diff options
| author | Jeff Dike <jdike@addtoit.com> | 2007-10-16 12:27:00 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 20:43:05 +0400 |
| commit | ba180fd437156f7fd8cfb2fdd021d949eeef08d6 (patch) | |
| tree | b9f38b9cdd7a5b1aacf00341d1948314663c5871 /arch/um | |
| parent | 77bf4400319db9d2a8af6b00c2be6faa0f3d07cb (diff) | |
| download | linux-ba180fd437156f7fd8cfb2fdd021d949eeef08d6.tar.xz | |
uml: style fixes pass 3
Formatting changes in the files which have been changed in the course
of folding foo_skas functions into their callers. These include:
copyright updates
header file trimming
style fixes
adding severity to printks
These changes should be entirely non-functional.
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um')
42 files changed, 1322 insertions, 1408 deletions
diff --git a/arch/um/include/irq_user.h b/arch/um/include/irq_user.h index e16ebce1290d..884a9c17eea0 100644 --- a/arch/um/include/irq_user.h +++ b/arch/um/include/irq_user.h @@ -1,12 +1,12 @@ /* - * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ #ifndef __IRQ_USER_H__ #define __IRQ_USER_H__ -#include "uml-config.h" +#include "sysdep/ptrace.h" struct irq_fd { struct irq_fd *next; diff --git a/arch/um/include/kern_util.h b/arch/um/include/kern_util.h index 9d3110f41ddb..7e7e84e4bc53 100644 --- a/arch/um/include/kern_util.h +++ b/arch/um/include/kern_util.h @@ -1,5 +1,5 @@ /* - * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ @@ -8,7 +8,6 @@ #include "sysdep/ptrace.h" #include "sysdep/faultinfo.h" -#include "uml-config.h" typedef void (*kern_hndl)(int, struct uml_pt_regs *); diff --git a/arch/um/include/os.h b/arch/um/include/os.h index daf188843a94..96f333cd560d 100644 --- a/arch/um/include/os.h +++ b/arch/um/include/os.h @@ -1,20 +1,18 @@ /* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ #ifndef __OS_H__ #define __OS_H__ -#include "uml-config.h" -#include "asm/types.h" -#include "../os/include/file.h" -#include "sysdep/ptrace.h" -#include "kern_util.h" -#include "skas/mm_id.h" +#include <stdarg.h> #include "irq_user.h" +#include "kern_util.h" +#include "longjmp.h" +#include "mm_id.h" #include "sysdep/tls.h" -#include "sysdep/archsetjmp.h" +#include "../os/include/file.h" #define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR)) @@ -140,7 +138,7 @@ extern int os_set_slip(int fd); extern int os_set_owner(int fd, int pid); extern int os_mode_fd(int fd, int mode); -extern int os_seek_file(int fd, __u64 offset); +extern int os_seek_file(int fd, unsigned long long offset); extern int os_open_file(char *file, struct openflags flags, int mode); extern int os_read_file(int fd, void *buf, int len); extern int os_write_file(int fd, const void *buf, int count); diff --git a/arch/um/include/skas/skas.h b/arch/um/include/skas/skas.h index b4a95e485929..b073f8a86bd3 100644 --- a/arch/um/include/skas/skas.h +++ b/arch/um/include/skas/skas.h @@ -1,12 +1,11 @@ /* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ #ifndef __SKAS_H #define __SKAS_H -#include "mm_id.h" #include "sysdep/ptrace.h" extern int userspace_pid[]; diff --git a/arch/um/include/sysdep-i386/ptrace.h b/arch/um/include/sysdep-i386/ptrace.h index d765175d42be..b843941acd1d 100644 --- a/arch/um/include/sysdep-i386/ptrace.h +++ b/arch/um/include/sysdep-i386/ptrace.h @@ -97,12 +97,12 @@ struct syscall_args { }; #define SYSCALL_ARGS(r) ((struct syscall_args) \ - { .args = { UPT_SYSCALL_ARG1(r), \ - UPT_SYSCALL_ARG2(r), \ - UPT_SYSCALL_ARG3(r), \ - UPT_SYSCALL_ARG4(r), \ - UPT_SYSCALL_ARG5(r), \ - UPT_SYSCALL_ARG6(r) } } ) + { .args = { UPT_SYSCALL_ARG1(r), \ + UPT_SYSCALL_ARG2(r), \ + UPT_SYSCALL_ARG3(r), \ + UPT_SYSCALL_ARG4(r), \ + UPT_SYSCALL_ARG5(r), \ + UPT_SYSCALL_ARG6(r) } } ) #define UPT_REG(regs, reg) \ ({ unsigned long val; \ diff --git a/arch/um/kernel/exec.c b/arch/um/kernel/exec.c index 5064fb691eb5..0d260567fd15 100644 --- a/arch/um/kernel/exec.c +++ b/arch/um/kernel/exec.c @@ -1,24 +1,19 @@ /* - * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include "linux/slab.h" +#include "linux/stddef.h" +#include "linux/fs.h" #include "linux/smp_lock.h" #include "linux/ptrace.h" -#include "linux/fs.h" -#include "asm/ptrace.h" -#include "asm/pgtable.h" -#include "asm/tlbflush.h" +#include "linux/sched.h" +#include "asm/current.h" +#include "asm/processor.h" #include "asm/uaccess.h" -#include "kern_util.h" -#include "as-layout.h" #include "mem_user.h" -#include "kern.h" -#include "irq_user.h" -#include "tlb.h" +#include "skas.h" #include "os.h" -#include "skas/skas.h" void flush_thread(void) { @@ -29,8 +24,8 @@ void flush_thread(void) arch_flush_thread(¤t->thread.arch); ret = unmap(¤t->mm->context.skas.id, 0, end, 1, &data); - if(ret){ - printk("flush_thread - clearing address space failed, " + if (ret) { + printk(KERN_ERR "flush_thread - clearing address space failed, " "err = %d\n", ret); force_sig(SIGKILL, current); } @@ -52,7 +47,7 @@ extern void log_exec(char **argv, void *tty); static long execve1(char *file, char __user * __user *argv, char __user *__user *env) { - long error; + long error; #ifdef CONFIG_TTY_LOG struct tty_struct *tty; @@ -62,16 +57,16 @@ static long execve1(char *file, char __user * __user *argv, log_exec(argv, tty); mutex_unlock(&tty_mutex); #endif - error = do_execve(file, argv, env, ¤t->thread.regs); - if (error == 0){ + error = do_execve(file, argv, env, ¤t->thread.regs); + if (error == 0) { task_lock(current); - current->ptrace &= ~PT_DTRACE; + current->ptrace &= ~PT_DTRACE; #ifdef SUBARCH_EXECVE1 SUBARCH_EXECVE1(¤t->thread.regs.regs); #endif task_unlock(current); - } - return(error); + } + return error; } long um_execve(char *file, char __user *__user *argv, char __user *__user *env) @@ -79,9 +74,9 @@ long um_execve(char *file, char __user *__user *argv, char __user *__user *env) long err; err = execve1(file, argv, env); - if(!err) + if (!err) do_longjmp(current->thread.exec_buf, 1); - return(err); + return err; } long sys_execve(char __user *file, char __user *__user *argv, @@ -98,5 +93,5 @@ long sys_execve(char __user *file, char __user *__user *argv, putname(filename); out: unlock_kernel(); - return(error); + return error; } diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c index b10ee28b97cb..277fce17b088 100644 --- a/arch/um/kernel/irq.c +++ b/arch/um/kernel/irq.c @@ -1,37 +1,19 @@ /* - * Copyright (C) 2000 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL * Derived (i.e. mostly copied) from arch/i386/kernel/irq.c: * Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar */ -#include "linux/kernel.h" -#include "linux/module.h" -#include "linux/smp.h" -#include "linux/kernel_stat.h" +#include "linux/cpumask.h" +#include "linux/hardirq.h" #include "linux/interrupt.h" -#include "linux/random.h" -#include "linux/slab.h" -#include "linux/file.h" -#include "linux/proc_fs.h" -#include "linux/init.h" +#include "linux/kernel_stat.h" +#include "linux/module.h" #include "linux/seq_file.h" -#include "linux/profile.h" -#include "linux/hardirq.h" -#include "asm/irq.h" -#include "asm/hw_irq.h" -#include "asm/atomic.h" -#include "asm/signal.h" -#include "asm/system.h" -#include "asm/errno.h" -#include "asm/uaccess.h" +#include "as-layout.h" #include "kern_util.h" -#include "irq_user.h" -#include "irq_kern.h" #include "os.h" -#include "sigio.h" -#include "misc_constants.h" -#include "as-layout.h" /* * Generic, controller-independent functions: @@ -71,9 +53,8 @@ int show_interrupts(struct seq_file *p, void *v) seq_putc(p, '\n'); skip: spin_unlock_irqrestore(&irq_desc[i].lock, flags); - } else if (i == NR_IRQS) { + } else if (i == NR_IRQS) seq_putc(p, '\n'); - } return 0; } @@ -102,11 +83,13 @@ void sigio_handler(int sig, struct uml_pt_regs *regs) while (1) { n = os_waiting_for_events(active_fds); if (n <= 0) { - if(n == -EINTR) continue; + if (n == -EINTR) + continue; else break; } - for (irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next) { + for (irq_fd = active_fds; irq_fd != NULL; + irq_fd = irq_fd->next) { if (irq_fd->current_events != 0) { irq_fd->current_events = 0; do_IRQ(irq_fd->irq, regs); @@ -138,8 +121,7 @@ int activate_fd(int irq, int fd, int type, void *dev_id) if (type == IRQ_READ) events = UM_POLLIN | UM_POLLPRI; - else - events = UM_POLLOUT; + else events = UM_POLLOUT; *new_fd = ((struct irq_fd) { .next = NULL, .id = dev_id, .fd = fd, @@ -153,9 +135,10 @@ int activate_fd(int irq, int fd, int type, void *dev_id) spin_lock_irqsave(&irq_lock, flags); for (irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next) { if ((irq_fd->fd == fd) && (irq_fd->type == type)) { - printk("Registering fd %d twice\n", fd); - printk("Irqs : %d, %d\n", irq_fd->irq, irq); - printk("Ids : 0x%p, 0x%p\n", irq_fd->id, dev_id); + printk(KERN_ERR "Registering fd %d twice\n", fd); + printk(KERN_ERR "Irqs : %d, %d\n", irq_fd->irq, irq); + printk(KERN_ERR "Ids : 0x%p, 0x%p\n", irq_fd->id, + dev_id); goto out_unlock; } } @@ -171,7 +154,8 @@ int activate_fd(int irq, int fd, int type, void *dev_id) if (n == 0) break; - /* n > 0 + /* + * n > 0 * It means we couldn't put new pollfd to current pollfds * and tmp_fds is NULL or too small for new pollfds array. * Needed size is equal to n as minimum. @@ -197,7 +181,8 @@ int activate_fd(int irq, int fd, int type, void *dev_id) spin_unlock_irqrestore(&irq_lock, flags); - /* This calls activate_fd, so it has to be outside the critical + /* + * This calls activate_fd, so it has to be outside the critical * section. */ maybe_sigio_broken(fd, (type == IRQ_READ)); @@ -264,13 +249,14 @@ static struct irq_fd *find_irq_by_fd(int fd, int irqnum, int *index_out) i++; } if (irq == NULL) { - printk("find_irq_by_fd doesn't have descriptor %d\n", fd); + printk(KERN_ERR "find_irq_by_fd doesn't have descriptor %d\n", + fd); goto out; } fdi = os_get_pollfd(i); if ((fdi != -1) && (fdi != fd)) { - printk("find_irq_by_fd - mismatch between active_fds and " - "pollfds, fd %d vs %d, need %d\n", irq->fd, + printk(KERN_ERR "find_irq_by_fd - mismatch between active_fds " + "and pollfds, fd %d vs %d, need %d\n", irq->fd, fdi, fd); irq = NULL; goto out; @@ -306,7 +292,7 @@ void deactivate_fd(int fd, int irqnum) spin_lock_irqsave(&irq_lock, flags); irq = find_irq_by_fd(fd, irqnum, &i); - if(irq == NULL){ + if (irq == NULL) { spin_unlock_irqrestore(&irq_lock, flags); return; } @@ -372,8 +358,10 @@ int um_request_irq(unsigned int irq, int fd, int type, EXPORT_SYMBOL(um_request_irq); EXPORT_SYMBOL(reactivate_fd); -/* hw_interrupt_type must define (startup || enable) && - * (shutdown || disable) && end */ +/* + * hw_interrupt_type must define (startup || enable) && + * (shutdown || disable) && end + */ static void dummy(unsigned int irq) { } @@ -422,7 +410,8 @@ int init_aio_irq(int irq, char *name, irq_handler_t handler) err = os_pipe(fds, 1, 1); if (err) { - printk("init_aio_irq - os_pipe failed, err = %d\n", -err); + printk(KERN_ERR "init_aio_irq - os_pipe failed, err = %d\n", + -err); goto out; } @@ -430,7 +419,8 @@ int init_aio_irq(int irq, char *name, irq_handler_t handler) IRQF_DISABLED | IRQF_SAMPLE_RANDOM, name, (void *) (long) fds[0]); if (err) { - printk("init_aio_irq - : um_request_irq failed, err = %d\n", + printk(KERN_ERR "init_aio_irq - : um_request_irq failed, " + "err = %d\n", err); goto out_close; } @@ -501,8 +491,9 @@ unsigned long to_irq_stack(unsigned long *mask_out) int nested; mask = xchg(&pending_mask, *mask_out); - if(mask != 0){ - /* If any interrupts come in at this point, we want to + if (mask != 0) { + /* + * If any interrupts come in at this point, we want to * make sure that their bits aren't lost by our * putting our bit in. So, this loop accumulates bits * until xchg returns the same value that we put in. @@ -514,13 +505,13 @@ unsigned long to_irq_stack(unsigned long *mask_out) do { old |= mask; mask = xchg(&pending_mask, old); - } while(mask != old); + } while (mask != old); return 1; } ti = current_thread_info(); nested = (ti->real_thread != NULL); - if(!nested){ + if (!nested) { struct task_struct *task; struct thread_info *tti; diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c index 90e89e838173..a55d221d8a4c 100644 --- a/arch/um/kernel/physmem.c +++ b/arch/um/kernel/physmem.c @@ -75,7 +75,7 @@ void map_memory(unsigned long virt, unsigned long phys, unsigned long len, err = os_map_memory((void *) virt, fd, offset, len, r, w, x); if (err) { if (err == -ENOMEM) - printk("try increasing the host's " + printk(KERN_ERR "try increasing the host's " "/proc/sys/vm/max_map_count to <physical " "memory size>/4096\n"); panic("map_memory(0x%lx, %d, 0x%llx, %ld, %d, %d, %d) failed, " @@ -103,7 +103,8 @@ void __init setup_physmem(unsigned long start, unsigned long reserve_end, exit(1); } - /* Special kludge - This page will be mapped in to userspace processes + /* + * Special kludge - This page will be mapped in to userspace processes * from physmem_fd, so it needs to be written out there. */ os_seek_file(physmem_fd, __pa(&__syscall_stub_start)); @@ -202,8 +203,8 @@ int setup_iomem(void) err = os_map_memory((void *) iomem_start, region->fd, 0, region->size, 1, 1, 0); if (err) - printk("Mapping iomem region for driver '%s' failed, " - "errno = %d\n", region->driver, -err); + printk(KERN_ERR "Mapping iomem region for driver '%s' " + "failed, errno = %d\n", region->driver, -err); else { region->virt = iomem_start; region->phys = __pa(region->virt); diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c index d3b9c62e73c7..7c037fa9c5b8 100644 --- a/arch/um/kernel/process.c +++ b/arch/um/kernel/process.c @@ -1,51 +1,29 @@ /* - * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Copyright 2003 PathScale, Inc. * Licensed under the GPL */ -#include "linux/kernel.h" -#include "linux/sched.h" -#include "linux/interrupt.h" -#include "linux/string.h" +#include "linux/stddef.h" +#include "linux/err.h" +#include "linux/hardirq.h" #include "linux/mm.h" -#include "linux/slab.h" -#include "linux/utsname.h" -#include "linux/fs.h" -#include "linux/utime.h" -#include "linux/smp_lock.h" -#include "linux/module.h" -#include "linux/init.h" -#include "linux/capability.h" -#include "linux/vmalloc.h" -#include "linux/spinlock.h" +#include "linux/personality.h" #include "linux/proc_fs.h" #include "linux/ptrace.h" #include "linux/random.h" -#include "linux/personality.h" -#include "asm/unistd.h" -#include "asm/mman.h" -#include "asm/segment.h" -#include "asm/stat.h" +#include "linux/sched.h" +#include "linux/threads.h" #include "asm/pgtable.h" -#include "asm/processor.h" -#include "asm/tlbflush.h" #include "asm/uaccess.h" -#include "asm/user.h" -#include "kern_util.h" #include "as-layout.h" -#include "kern.h" -#include "signal_kern.h" -#include "init.h" -#include "irq_user.h" -#include "mem_user.h" -#include "tlb.h" -#include "frame_kern.h" -#include "sigcontext.h" +#include "kern_util.h" #include "os.h" #include "skas.h" +#include "tlb.h" -/* This is a per-cpu array. A processor only modifies its entry and it only +/* + * This is a per-cpu array. A processor only modifies its entry and it only * cares about its entry, so it's OK if another processor is modifying its * entry. */ @@ -54,15 +32,15 @@ struct cpu_task cpu_tasks[NR_CPUS] = { [0 ... NR_CPUS - 1] = { -1, NULL } }; static inline int external_pid(struct task_struct *task) { /* FIXME: Need to look up userspace_pid by cpu */ - return(userspace_pid[0]); + return userspace_pid[0]; } int pid_to_processor_id(int pid) { int i; - for(i = 0; i < ncpus; i++){ - if(cpu_tasks[i].pid == pid) + for(i = 0; i < ncpus; i++) { + if (cpu_tasks[i].pid == pid) return i; } return -1; @@ -118,7 +96,7 @@ void *_switch_to(void *prev, void *next, void *last) current->thread.saved_task = NULL; /* XXX need to check runqueues[cpu].idle */ - if(current->pid == 0) + if (current->pid == 0) switch_timers(0); switch_threads(&from->thread.switch_buf, @@ -126,10 +104,10 @@ void *_switch_to(void *prev, void *next, void *last) arch_switch_to(current->thread.prev_sched, current); - if(current->pid == 0) + if (current->pid == 0) switch_timers(1); - if(current->thread.saved_task) + if (current->thread.saved_task) show_regs(&(current->thread.regs)); next= current->thread.saved_task; prev= current; @@ -141,9 +119,9 @@ void *_switch_to(void *prev, void *next, void *last) void interrupt_end(void) { - if(need_resched()) + if (need_resched()) schedule(); - if(test_tsk_thread_flag(current, TIF_SIGPENDING)) + if (test_tsk_thread_flag(current, TIF_SIGPENDING)) do_signal(); } @@ -158,7 +136,8 @@ void *get_current(void) extern void schedule_tail(struct task_struct *prev); -/* This is called magically, by its address being stuffed in a jmp_buf +/* + * This is called magically, by its address being stuffed in a jmp_buf * and being longjmp-d to. */ void new_thread_handler(void) @@ -166,18 +145,19 @@ void new_thread_handler(void) int (*fn)(void *), n; void *arg; - if(current->thread.prev_sched != NULL) + if (current->thread.prev_sched != NULL) schedule_tail(current->thread.prev_sched); current->thread.prev_sched = NULL; fn = current->thread.request.u.thread.proc; arg = current->thread.request.u.thread.arg; - /* The return value is 1 if the kernel thread execs a process, + /* + * The return value is 1 if the kernel thread execs a process, * 0 if it just exits */ n = run_kernel_thread(fn, arg, ¤t->thread.exec_buf); - if(n == 1){ + if (n == 1) { /* Handle any immediate reschedules or signals */ interrupt_end(); userspace(¤t->thread.regs.regs); @@ -189,14 +169,16 @@ void new_thread_handler(void) void fork_handler(void) { force_flush_all(); - if(current->thread.prev_sched == NULL) + if (current->thread.prev_sched == NULL) panic("blech"); schedule_tail(current->thread.prev_sched); - /* XXX: if interrupt_end() calls schedule, this call to + /* + * XXX: if interrupt_end() calls schedule, this call to * arch_switch_to isn't needed. We could want to apply this to - * improve performance. -bb */ + * improve performance. -bb + */ arch_switch_to(current->thread.prev_sched, current); current->thread.prev_sched = NULL; @@ -216,11 +198,11 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long sp, p->thread = (struct thread_struct) INIT_THREAD; - if(current->thread.forking){ + if (current->thread.forking) { memcpy(&p->thread.regs.regs, ®s->regs, sizeof(p->thread.regs.regs)); REGS_SET_SYSCALL_RETURN(p->thread.regs.regs.regs, 0); - if(sp != 0) + if (sp != 0) REGS_SP(p->thread.regs.regs.regs) = sp; handler = fork_handler; @@ -259,14 +241,14 @@ void initial_thread_cb(void (*proc)(void *), void *arg) void default_idle(void) { - while(1){ + while(1) { /* endless idle loop with no priority at all */ /* * although we are an idle CPU, we do not want to * get into the scheduler unnecessarily. */ - if(need_resched()) + if (need_resched()) schedule(); idle_sleep(10); @@ -288,26 +270,26 @@ void *um_virt_to_phys(struct task_struct *task, unsigned long addr, pte_t *pte; pte_t ptent; - if(task->mm == NULL) + if (task->mm == NULL) return ERR_PTR(-EINVAL); pgd = pgd_offset(task->mm, addr); - if(!pgd_present(*pgd)) + if (!pgd_present(*pgd)) return ERR_PTR(-EINVAL); pud = pud_offset(pgd, addr); - if(!pud_present(*pud)) + if (!pud_present(*pud)) return ERR_PTR(-EINVAL); pmd = pmd_offset(pud, addr); - if(!pmd_present(*pmd)) + if (!pmd_present(*pmd)) return ERR_PTR(-EINVAL); pte = pte_offset_kernel(pmd, addr); ptent = *pte; - if(!pte_present(ptent)) + if (!pte_present(ptent)) return ERR_PTR(-EINVAL); - if(pte_out != NULL) + if (pte_out != NULL) *pte_out = ptent; return (void *) (pte_val(ptent) & PAGE_MASK) + (addr & ~PAGE_MASK); } @@ -380,7 +362,7 @@ int smp_sigio_handler(void) #ifdef CONFIG_SMP int cpu = current_thread->cpu; IPI_handler(cpu); - if(cpu != 0) + if (cpu != 0) return 1; #endif return 0; @@ -408,7 +390,8 @@ int get_using_sysemu(void) static int proc_read_sysemu(char *buf, char **start, off_t offset, int size,int *eof, void *data) { - if (snprintf(buf, size, "%d\n", get_using_sysemu()) < size) /*No overflow*/ + if (snprintf(buf, size, "%d\n", get_using_sysemu()) < size) + /* No overflow */ *eof = 1; return strlen(buf); @@ -423,7 +406,8 @@ static int proc_write_sysemu(struct file *file,const char __user *buf, unsigned if (tmp[0] >= '0' && tmp[0] <= '2') set_using_sysemu(tmp[0] - '0'); - return count; /*We use the first char, but pretend to write everything*/ + /* We use the first char, but pretend to write everything */ + return count; } int __init make_proc_sysemu(void) @@ -453,10 +437,10 @@ int singlestepping(void * t) struct task_struct *task = t ? t : current; if ( ! (task->ptrace & PT_DTRACE) ) - return(0); + return 0; if (task->thread.singlestep_syscall) - return(1); + return 1; return 2; } diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c index bbc3a4a9a0fa..db55a017e9b9 100644 --- a/arch/um/kernel/ptrace.c +++ b/arch/um/kernel/ptrace.c @@ -1,35 +1,27 @@ -/* - * Copyright (C) 2000 Jeff Dike (jdike@karaya.com) +/* + * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include "linux/sched.h" -#include "linux/mm.h" -#include "linux/errno.h" -#include "linux/smp_lock.h" -#include "linux/security.h" -#include "linux/ptrace.h" #include "linux/audit.h" +#include "linux/ptrace.h" +#include "linux/sched.h" +#include "asm/uaccess.h" #ifdef CONFIG_PROC_MM -#include "linux/proc_mm.h" +#include "proc_mm.h" #endif -#include "asm/ptrace.h" -#include "asm/uaccess.h" -#include "kern_util.h" #include "skas_ptrace.h" -#include "sysdep/ptrace.h" -#include "os.h" static inline void set_singlestepping(struct task_struct *child, int on) { - if (on) - child->ptrace |= PT_DTRACE; - else - child->ptrace &= ~PT_DTRACE; - child->thread.singlestep_syscall = 0; + if (on) + child->ptrace |= PT_DTRACE; + else + child->ptrace &= ~PT_DTRACE; + child->thread.singlestep_syscall = 0; #ifdef SUBARCH_SET_SINGLESTEPPING - SUBARCH_SET_SINGLESTEPPING(child, on); + SUBARCH_SET_SINGLESTEPPING(child, on); #endif } @@ -37,8 +29,8 @@ static inline void set_singlestepping(struct task_struct *child, int on) * Called by kernel/ptrace.c when detaching.. */ void ptrace_disable(struct task_struct *child) -{ - set_singlestepping(child,0); +{ + set_singlestepping(child,0); } extern int peek_user(struct task_struct * child, long addr, long data); @@ -50,40 +42,40 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) unsigned long __user *p = (void __user *)(unsigned long)data; switch (request) { - /* when I and D space are separate, these will need to be fixed. */ - case PTRACE_PEEKTEXT: /* read word at location addr. */ + /* read word at location addr. */ + case PTRACE_PEEKTEXT: case PTRACE_PEEKDATA: ret = generic_ptrace_peekdata(child, addr, data); break; /* read the word at location addr in the USER area. */ - case PTRACE_PEEKUSR: - ret = peek_user(child, addr, data); - break; + case PTRACE_PEEKUSR: + ret = peek_user(child, addr, data); + break; - /* when I and D space are separate, this will have to be fixed. */ - case PTRACE_POKETEXT: /* write the word at location addr. */ + /* write the word at location addr. */ + case PTRACE_POKETEXT: case PTRACE_POKEDATA: ret = generic_ptrace_pokedata(child, addr, data); break; - case PTRACE_POKEUSR: /* write the word at location addr in the USER area */ - ret = poke_user(child, addr, data); - break; + /* write the word at location addr in the USER area */ + case PTRACE_POKEUSR: + ret = poke_user(child, addr, data); + break; - case PTRACE_SYSCALL: /* continue and stop at next (return from) syscall */ - case PTRACE_CONT: { /* restart after signal. */ + /* continue and stop at next (return from) syscall */ + case PTRACE_SYSCALL: + /* restart after signal. */ + case PTRACE_CONT: { ret = -EIO; if (!valid_signal(data)) break; - set_singlestepping(child, 0); - if (request == PTRACE_SYSCALL) { + set_singlestepping(child, 0); + if (request == PTRACE_SYSCALL) set_tsk_thread_flag(child, TIF_SYSCALL_TRACE); - } - else { - clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE); - } + else clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE); child->exit_code = data; wake_up_process(child); ret = 0; @@ -91,8 +83,8 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) } /* - * make the child exit. Best I can do is send it a sigkill. - * perhaps it should be put in the status that it wants to + * make the child exit. Best I can do is send it a sigkill. + * perhaps it should be put in the status that it wants to * exit. */ case PTRACE_KILL: { @@ -100,7 +92,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) if (child->exit_state == EXIT_ZOMBIE) /* already dead */ break; - set_singlestepping(child, 0); + set_singlestepping(child, 0); child->exit_code = SIGKILL; wake_up_process(child); break; @@ -111,7 +103,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) if (!valid_signal(data)) break; clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE); - set_singlestepping(child, 1); + set_singlestepping(child, 1); child->exit_code = data; /* give it a chance to run. */ wake_up_process(child); @@ -180,13 +172,14 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) break; case PTRACE_FAULTINFO: { - /* Take the info from thread->arch->faultinfo, + /* + * Take the info from thread->arch->faultinfo, * but transfer max. sizeof(struct ptrace_faultinfo). * On i386, ptrace_faultinfo is smaller! */ ret = copy_to_user(p, &child->thread.arch.faultinfo, sizeof(struct ptrace_faultinfo)); - if(ret) + if (ret) break; break; } @@ -195,12 +188,13 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) case PTRACE_LDT: { struct ptrace_ldt ldt; - if(copy_from_user(&ldt, p, sizeof(ldt))){ + if (copy_from_user(&ldt, p, sizeof(ldt))) { ret = -EIO; break; } - /* This one is confusing, so just punt and return -EIO for + /* + * This one is confusing, so just punt and return -EIO for * now */ ret = -EIO; @@ -212,7 +206,7 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) struct mm_struct *old = child->mm; struct mm_struct *new = proc_mm_get_mm(data); - if(IS_ERR(new)){ + if (IS_ERR(new)) { ret = PTR_ERR(new); break; } @@ -226,10 +220,10 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) } #endif #ifdef PTRACE_ARCH_PRCTL - case PTRACE_ARCH_PRCTL: - /* XXX Calls ptrace on the host - needs some SMP thinking */ - ret = arch_prctl(child, data, (void *) addr); - break; + case PTRACE_ARCH_PRCTL: + /* XXX Calls ptrace on the host - needs some SMP thinking */ + ret = arch_prctl(child, data, (void *) addr); + break; #endif default: ret = ptrace_request(child, request, addr, data); @@ -255,7 +249,8 @@ void send_sigtrap(struct task_struct *tsk, struct uml_pt_regs *regs, force_sig_info(SIGTRAP, &info, tsk); } -/* XXX Check PT_DTRACE vs TIF_SINGLESTEP for singlestepping check and +/* + * XXX Check PT_DTRACE vs TIF_SINGLESTEP for singlestepping check and * PT_PTRACED vs TIF_SYSCALL_TRACE for syscall tracing check */ void syscall_trace(struct uml_pt_regs *regs, int entryexit) @@ -272,7 +267,7 @@ void syscall_trace(struct uml_pt_regs *regs, int entryexit) UPT_SYSCALL_ARG3(regs), UPT_SYSCALL_ARG4(regs)); else audit_syscall_exit(AUDITSC_RESULT(UPT_SYSCALL_RET(regs)), - UPT_SYSCALL_RET(regs)); + UPT_SYSCALL_RET(regs)); } /* Fake a debug trap */ @@ -285,15 +280,18 @@ void syscall_trace(struct uml_pt_regs *regs, int entryexit) if (!(current->ptrace & PT_PTRACED)) return; - /* the 0x80 provides a way for the tracing parent to distinguish - between a syscall stop and SIGTRAP delivery */ + /* + * the 0x80 provides a way for the tracing parent to distinguish + * between a syscall stop and SIGTRAP delivery + */ tracesysgood = (current->ptrace & PT_TRACESYSGOOD); ptrace_notify(SIGTRAP | (tracesysgood ? 0x80 : 0)); if (entryexit) /* force do_signal() --> is_syscall() */ set_thread_flag(TIF_SIGPENDING); - /* this isn't the same as continuing with a signal, but it will do + /* + * this isn't the same as continuing with a signal, but it will do * for normal use. strace only continues with a signal if the * stopping signal is not SIGTRAP. -brl */ diff --git a/arch/um/kernel/reboot.c b/arch/um/kernel/reboot.c index f3bd18bbf07f..9d8eea47a0fc 100644 --- a/arch/um/kernel/reboot.c +++ b/arch/um/kernel/reboot.c @@ -1,13 +1,9 @@ /* - * Copyright (C) 2000, 2002 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include "linux/module.h" #include "linux/sched.h" -#include "asm/smp.h" -#include "kern_util.h" -#include "kern.h" #include "os.h" #include "skas.h" @@ -37,20 +33,20 @@ static void kill_off_processes(void) void uml_cleanup(void) { - kmalloc_ok = 0; + kmalloc_ok = 0; do_uml_exitcalls(); kill_off_processes(); } void machine_restart(char * __unused) { - uml_cleanup(); + uml_cleanup(); reboot_skas(); } void machine_power_off(void) { - uml_cleanup(); + uml_cleanup(); halt_skas(); } diff --git a/arch/um/kernel/signal.c b/arch/um/kernel/signal.c index 4dab7e417ba9..19cb97733937 100644 --- a/arch/um/kernel/signal.c +++ b/arch/um/kernel/signal.c @@ -1,27 +1,16 @@ /* - * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include "linux/stddef.h" -#include "linux/sys.h" -#include "linux/sched.h" -#include "linux/wait.h" -#include "linux/kernel.h" -#include "linux/smp_lock.h" #include "linux/module.h" -#include "linux/slab.h" -#include "linux/tty.h" -#include "linux/binfmts.h" #include "linux/ptrace.h" +#include "linux/sched.h" +#include "asm/siginfo.h" #include "asm/signal.h" -#include "asm/uaccess.h" #include "asm/unistd.h" -#include "asm/ucontext.h" -#include "kern_util.h" -#include "signal_kern.h" -#include "kern.h" #include "frame_kern.h" +#include "kern_util.h" #include "sigcontext.h" EXPORT_SYMBOL(block_signals); @@ -45,9 +34,9 @@ static int handle_signal(struct pt_regs *regs, unsigned long signr, current_thread_info()->restart_block.fn = do_no_restart_syscall; /* Did we come from a system call? */ - if(PT_REGS_SYSCALL_NR(regs) >= 0){ + if (PT_REGS_SYSCALL_NR(regs) >= 0) { /* If so, check system call restarting.. */ - switch(PT_REGS_SYSCALL_RET(regs)){ + switch(PT_REGS_SYSCALL_RET(regs)) { case -ERESTART_RESTARTBLOCK: case -ERESTARTNOHAND: PT_REGS_SYSCALL_RET(regs) = -EINTR; @@ -67,17 +56,17 @@ static int handle_signal(struct pt_regs *regs, unsigned long signr, } sp = PT_REGS_SP(regs); - if((ka->sa.sa_flags & SA_ONSTACK) && (sas_ss_flags(sp) == 0)) + if ((ka->sa.sa_flags & SA_ONSTACK) && (sas_ss_flags(sp) == 0)) sp = current->sas_ss_sp + current->sas_ss_size; #ifdef CONFIG_ARCH_HAS_SC_SIGNALS - if(!(ka->sa.sa_flags & SA_SIGINFO)) + if (!(ka->sa.sa_flags & SA_SIGINFO)) err = setup_signal_stack_sc(sp, signr, ka, regs, oldset); else #endif err = setup_signal_stack_si(sp, signr, ka, regs, info, oldset); - if(err){ + if (err) { spin_lock_irq(¤t->sighand->siglock); current->blocked = *oldset; recalc_sigpending(); @@ -87,7 +76,7 @@ static int handle_signal(struct pt_regs *regs, unsigned long signr, spin_lock_irq(¤t->sighand->siglock); sigorsets(¤t->blocked, ¤t->blocked, &ka->sa.sa_mask); - if(!(ka->sa.sa_flags & SA_NODEFER)) + if (!(ka->sa.sa_flags & SA_NODEFER)) sigaddset(¤t->blocked, signr); recalc_sigpending(); spin_unlock_irq(¤t->sighand->siglock); @@ -108,14 +97,16 @@ static int kern_do_signal(struct pt_regs *regs) else oldset = ¤t->blocked; - while((sig = get_signal_to_deliver(&info, &ka_copy, regs, NULL)) > 0){ + while ((sig = get_signal_to_deliver(&info, &ka_copy, regs, NULL)) > 0) { handled_sig = 1; /* Whee! Actually deliver the signal. */ - if(!handle_signal(regs, sig, &ka_copy, &info, oldset)){ - /* a signal was successfully delivered; the saved + if (!handle_signal(regs, sig, &ka_copy, &info, oldset)) { + /* + * a signal was successfully delivered; the saved * sigmask will have been stored in the signal frame, * and will be restored by sigreturn, so we can simply - * clear the TIF_RESTORE_SIGMASK flag */ + * clear the TIF_RESTORE_SIGMASK flag + */ if (test_thread_flag(TIF_RESTORE_SIGMASK)) clear_thread_flag(TIF_RESTORE_SIGMASK); break; @@ -123,9 +114,9 @@ static int kern_do_signal(struct pt_regs *regs) } /* Did we come from a system call? */ - if(!handled_sig && (PT_REGS_SYSCALL_NR(regs) >= 0)){ + if (!handled_sig && (PT_REGS_SYSCALL_NR(regs) >= 0)) { /* Restart the system call - no handlers present */ - switch(PT_REGS_SYSCALL_RET(regs)){ + switch(PT_REGS_SYSCALL_RET(regs)) { case -ERESTARTNOHAND: case -ERESTARTSYS: case -ERESTARTNOINTR: @@ -136,22 +127,25 @@ static int kern_do_signal(struct pt_regs *regs) PT_REGS_ORIG_SYSCALL(regs) = __NR_restart_syscall; PT_REGS_RESTART_SYSCALL(regs); break; - } + } } - /* This closes a way to execute a system call on the host. If + /* + * This closes a way to execute a system call on the host. If * you set a breakpoint on a system call instruction and singlestep * from it, the tracing thread used to PTRACE_SINGLESTEP the process * rather than PTRACE_SYSCALL it, allowing the system call to execute * on the host. The tracing thread will check this flag and * PTRACE_SYSCALL if necessary. */ - if(current->ptrace & PT_DTRACE) + if (current->ptrace & PT_DTRACE) current->thread.singlestep_syscall = is_syscall(PT_REGS_IP(¤t->thread.regs)); - /* if there's no signal to deliver, we just put the saved sigmask - * back */ + /* + * if there's no signal to deliver, we just put the saved sigmask + * back + */ if (!handled_sig && test_thread_flag(TIF_RESTORE_SIGMASK)) { clear_thread_flag(TIF_RESTORE_SIGMASK); sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); diff --git a/arch/um/kernel/skas/Makefile b/arch/um/kernel/skas/Makefile index b2823cdd783e..0b76d8869c94 100644 --- a/arch/um/kernel/skas/Makefile +++ b/arch/um/kernel/skas/Makefile @@ -1,5 +1,5 @@ # -# Copyright (C) 2002 - 2004 Jeff Dike (jdike@addtoit.com) +# Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) # Licensed under the GPL # diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c index 902d74138952..c5475ecd9fd4 100644 --- a/arch/um/kernel/skas/mmu.c +++ b/arch/um/kernel/skas/mmu.c @@ -1,20 +1,12 @@ -/* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) +/* + * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include "linux/sched.h" -#include "linux/list.h" -#include "linux/spinlock.h" -#include "linux/slab.h" -#include "linux/errno.h" #include "linux/mm.h" -#include "asm/current.h" -#include "asm/segment.h" -#include "asm/mmu.h" +#include "linux/sched.h" #include "asm/pgalloc.h" #include "asm/pgtable.h" -#include "asm/ldt.h" #include "os.h" #include "skas.h" @@ -41,10 +33,11 @@ static int init_stub_pte(struct mm_struct *mm, unsigned long proc, if (!pte) goto out_pte; - /* There's an interaction between the skas0 stub pages, stack + /* + * There's an interaction between the skas0 stub pages, stack * randomization, and the BUG at the end of exit_mmap. exit_mmap - * checks that the number of page tables freed is the same as had - * been allocated. If the stack is on the last page table page, + * checks that the number of page tables freed is the same as had + * been allocated. If the stack is on the last page table page, * then the stack pte page will be freed, and if not, it won't. To * avoid having to know where the stack is, or if the process mapped * something at the top of its address space for some other reason, @@ -54,36 +47,37 @@ static int init_stub_pte(struct mm_struct *mm, unsigned long proc, * destroy_context_skas. */ - mm->context.skas.last_page_table = pmd_page_vaddr(*pmd); + mm->context.skas.last_page_table = pmd_page_vaddr(*pmd); #ifdef CONFIG_3_LEVEL_PGTABLES - mm->context.skas.last_pmd = (unsigned long) __va(pud_val(*pud)); + mm->context.skas.last_pmd = (unsigned long) __va(pud_val(*pud)); #endif *pte = mk_pte(virt_to_page(kernel), __pgprot(_PAGE_PRESENT)); *pte = pte_mkread(*pte); - return(0); + return 0; out_pmd: pud_free(pud); out_pte: pmd_free(pmd); out: - return(-ENOMEM); + return -ENOMEM; } int init_new_context(struct task_struct *task, struct mm_struct *mm) { - struct mmu_context_skas *from_mm = NULL; + struct mmu_context_skas *from_mm = NULL; struct mmu_context_skas *to_mm = &mm->context.skas; unsigned long stack = 0; int ret = -ENOMEM; - if(skas_needs_stub){ + if (skas_needs_stub) { stack = get_zeroed_page(GFP_KERNEL); - if(stack == 0) + if (stack == 0) goto out; - /* This zeros the entry that pgd_alloc didn't, needed since + /* + * This zeros the entry that pgd_alloc didn't, needed since * we are about to reinitialize it, and want mm.nr_ptes to * be accurate. */ @@ -91,39 +85,39 @@ int init_new_context(struct task_struct *task, struct mm_struct *mm) ret = init_stub_pte(mm, CONFIG_STUB_CODE, (unsigned long) &__syscall_stub_start); - if(ret) + if (ret) goto out_free; ret = init_stub_pte(mm, CONFIG_STUB_DATA, stack); - if(ret) + if (ret) goto out_free; mm->nr_ptes--; } to_mm->id.stack = stack; - if(current->mm != NULL && current->mm != &init_mm) + if (current->mm != NULL && current->mm != &init_mm) from_mm = ¤t->mm->context.skas; - if(proc_mm){ + if (proc_mm) { ret = new_mm(stack); - if(ret < 0){ - printk("init_new_context_skas - new_mm failed, " - "errno = %d\n", ret); + if (ret < 0) { + printk(KERN_ERR "init_new_context_skas - " + "new_mm failed, errno = %d\n", ret); goto out_free; } to_mm->id.u.mm_fd = ret; } else { - if(from_mm) + if (from_mm) to_mm->id.u.pid = copy_context_skas0(stack, from_mm->id.u.pid); else to_mm->id.u.pid = start_userspace(stack); } ret = init_new_ldt(to_mm, from_mm); - if(ret < 0){ - printk("init_new_context_skas - init_ldt" + if (ret < 0) { + printk(KERN_ERR "init_new_context_skas - init_ldt" " failed, errno = %d\n", ret); goto out_free; } @@ -131,7 +125,7 @@ int init_new_context(struct task_struct *task, struct mm_struct *mm) return 0; out_free: - if(to_mm->id.stack != 0) + if (to_mm->id.stack != 0) free_page(to_mm->id.stack); out: return ret; @@ -141,12 +135,12 @@ void destroy_context(struct mm_struct *mm) { struct mmu_context_skas *mmu = &mm->context.skas; - if(proc_mm) + if (proc_mm) os_close_file(mmu->id.u.mm_fd); else os_kill_ptraced_process(mmu->id.u.pid, 1); - if(!proc_mm || !ptrace_faultinfo){ + if (!proc_mm || !ptrace_faultinfo) { free_page(mmu->id.stack); pte_lock_deinit(virt_to_page(mmu->last_page_table)); pte_free_kernel((pte_t *) mmu->last_page_table); diff --git a/arch/um/kernel/skas/process.c b/arch/um/kernel/skas/process.c index dabae62d52be..9ce1c49421f8 100644 --- a/arch/um/kernel/skas/process.c +++ b/arch/um/kernel/skas/process.c @@ -1,36 +1,23 @@ /* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include "linux/sched.h" -#include "linux/slab.h" -#include "linux/ptrace.h" -#include "linux/proc_fs.h" -#include "linux/file.h" -#include "linux/errno.h" #include "linux/init.h" -#include "asm/uaccess.h" -#include "asm/atomic.h" -#include "kern_util.h" +#include "linux/sched.h" #include "as-layout.h" -#include "skas.h" #include "os.h" -#include "tlb.h" -#include "kern.h" -#include "registers.h" - -extern void schedule_tail(struct task_struct *prev); +#include "skas.h" int new_mm(unsigned long stack) { int fd; fd = os_open_file("/proc/mm", of_cloexec(of_write(OPENFLAGS())), 0); - if(fd < 0) + if (fd < 0) return fd; - if(skas_needs_stub) + if (skas_needs_stub) map_stub_pages(fd, CONFIG_STUB_CODE, CONFIG_STUB_DATA, stack); return fd; @@ -62,7 +49,7 @@ int __init start_uml(void) { stack_protections((unsigned long) &cpu0_irqstack); set_sigstack(cpu0_irqstack, THREAD_SIZE); - if(proc_mm) + if (proc_mm) userspace_pid[0] = start_userspace(0); init_new_thread_signals(); @@ -75,7 +62,7 @@ int __init start_uml(void) unsigned long current_stub_stack(void) { - if(current->mm == NULL) + if (current->mm == NULL) return 0; return current->mm->context.skas.id.stack; diff --git a/arch/um/kernel/skas/syscall.c b/arch/um/kernel/skas/syscall.c index e183da633c89..8582c1331048 100644 --- a/arch/um/kernel/skas/syscall.c +++ b/arch/um/kernel/skas/syscall.c @@ -1,17 +1,13 @@ /* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include "linux/sys.h" +#include "linux/kernel.h" #include "linux/ptrace.h" -#include "asm/errno.h" -#include "asm/unistd.h" -#include "asm/ptrace.h" -#include "asm/current.h" -#include "sysdep/syscalls.h" #include "kern_util.h" -#include "syscall.h" +#include "sysdep/ptrace.h" +#include "sysdep/syscalls.h" void handle_syscall(struct uml_pt_regs *r) { @@ -24,7 +20,8 @@ void handle_syscall(struct uml_pt_regs *r) current->thread.nsyscalls++; nsyscalls++; - /* This should go in the declaration of syscall, but when I do that, + /* + * This should go in the declaration of syscall, but when I do that, * strace -f -c bash -c 'ls ; ls' breaks, sometimes not tracing * children at all, sometimes hanging when bash doesn't see the first * ls exit. @@ -33,7 +30,7 @@ void handle_syscall(struct uml_pt_regs *r) * in case it's a compiler bug. */ syscall = UPT_SYSCALL_NR(r); - if((syscall >= NR_syscalls) || (syscall < 0)) + if ((syscall >= NR_syscalls) || (syscall < 0)) result = -ENOSYS; else result = EXECUTE_SYSCALL(syscall, regs); diff --git a/arch/um/kernel/syscall.c b/arch/um/kernel/syscall.c index ebb29f5259a9..b9d92b2089ae 100644 --- a/arch/um/kernel/syscall.c +++ b/arch/um/kernel/syscall.c @@ -1,25 +1,17 @@ /* - * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com) + * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include "linux/sched.h" #include "linux/file.h" -#include "linux/smp_lock.h" -#include "linux/mm.h" #include "linux/fs.h" +#include "linux/mm.h" +#include "linux/sched.h" #include "linux/utsname.h" -#include "linux/msg.h" -#include "linux/shm.h" -#include "linux/sys.h" -#include "linux/syscalls.h" -#include "linux/unistd.h" -#include "linux/slab.h" -#include "linux/utime.h" +#include "asm/current.h" #include "asm/mman.h" #include "asm/uaccess.h" -#include "kern_util.h" -#include "sysdep/syscalls.h" +#include "asm/unistd.h" /* Unlocked, I don't care if this is a bit off */ int nsyscalls = 0; @@ -32,7 +24,7 @@ long sys_fork(void) ret = do_fork(SIGCHLD, UPT_SP(¤t->thread.regs.regs), ¤t->thread.regs, 0, NULL, NULL); current->thread.forking = 0; - return(ret); + return ret; } long sys_vfork(void) @@ -44,7 +36,7 @@ long sys_vfork(void) UPT_SP(¤t->thread.regs.regs), ¤t->thread.regs, 0, NULL, NULL); current->thread.forking = 0; - return(ret); + return ret; } /* common code for old and new mmaps */ @@ -90,15 +82,15 @@ long old_mmap(unsigned long addr, unsigned long len, */ long sys_pipe(unsigned long __user * fildes) { - int fd[2]; - long error; + int fd[2]; + long error; - error = do_pipe(fd); - if (!error) { + error = do_pipe(fd); + if (!error) { if (copy_to_user(fildes, fd, sizeof(fd))) - error = -EFAULT; - } - return error; + error = -EFAULT; + } + return error; } @@ -122,7 +114,7 @@ long sys_olduname(struct oldold_utsname __user * name) if (!access_ok(VERIFY_WRITE,name,sizeof(struct oldold_utsname))) return -EFAULT; - down_read(&uts_sem); + down_read(&uts_sem); error = __copy_to_user(&name->sysname, &utsname()->sysname, __OLD_UTS_LEN); diff --git a/arch/um/kernel/time.c b/arch/um/kernel/time.c index 90e24e2dbeaa..4fc8c2586b70 100644 --- a/arch/um/kernel/time.c +++ b/arch/um/kernel/time.c @@ -1,28 +1,19 @@ /* - * Copyright (C) 2000 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include "linux/kernel.h" -#include "linux/module.h" -#include "linux/unistd.h" -#include "linux/stddef.h" -#include "linux/spinlock.h" -#include "linux/time.h" -#include "linux/sched.h" #include "linux/interrupt.h" -#include "linux/init.h" -#include "linux/delay.h" -#include "linux/hrtimer.h" +#include "linux/jiffies.h" +#include "linux/threads.h" #include "asm/irq.h" #include "asm/param.h" -#include "asm/current.h" #include "kern_util.h" #include "os.h" int hz(void) { - return(HZ); + return HZ; } /* @@ -43,7 +34,7 @@ void timer_irq(struct uml_pt_regs *regs) unsigned long long ticks = 0; #ifdef CONFIG_UML_REAL_TIME_CLOCK int c = cpu(); - if(prev_nsecs[c]){ + if (prev_nsecs[c]) { /* We've had 1 tick */ unsigned long long nsecs = os_nsecs(); @@ -51,7 +42,7 @@ void timer_irq(struct uml_pt_regs *regs) prev_nsecs[c] = nsecs; /* Protect against the host clock being set backwards */ - if(delta[c] < 0) + if (delta[c] < 0) delta[c] = 0; ticks += (delta[c] * HZ) / BILLION; @@ -61,7 +52,7 @@ void timer_irq(struct uml_pt_regs *regs) #else ticks = 1; #endif - while(ticks > 0){ + while (ticks > 0) { do_IRQ(TIMER_IRQ, regs); ticks--; } @@ -112,12 +103,12 @@ static void register_timer(void) int err; err = request_irq(TIMER_IRQ, um_timer, IRQF_DISABLED, "timer", NULL); - if(err != 0) + if (err != 0) printk(KERN_ERR "register_timer : request_irq failed - " "errno = %d\n", -err); err = set_interval(1); - if(err != 0) + if (err != 0) printk(KERN_ERR "register_timer : set_interval failed - " "errno = %d\n", -err); } @@ -144,7 +135,8 @@ void do_gettimeofday(struct timeval *tv) xtime.tv_nsec; #endif tv->tv_sec = nsecs / NSEC_PER_SEC; - /* Careful about calculations here - this was originally done as + /* + * Careful about calculations here - this was originally done as * (nsecs - tv->tv_sec * NSEC_PER_SEC) / NSEC_PER_USEC * which gave bogus (> 1000000) values. Dunno why, suspect gcc * (4.0.0) miscompiled it, or there's a subtle 64/32-bit conversion @@ -176,7 +168,7 @@ int do_settimeofday(struct timespec *tv) void timer_handler(int sig, struct uml_pt_regs *regs) { - if(current_thread->cpu == 0) + if (current_thread->cpu == 0) timer_irq(regs); local_irq_disable(); irq_enter(); diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c index 12b8c637527d..849922fcfb60 100644 --- a/arch/um/kernel/tlb.c +++ b/arch/um/kernel/tlb.c @@ -1,19 +1,16 @@ /* - * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ #include "linux/mm.h" -#include "asm/page.h" -#include "asm/pgalloc.h" #include "asm/pgtable.h" #include "asm/tlbflush.h" #include "as-layout.h" -#include "tlb.h" -#include "mem.h" #include "mem_user.h" #include "os.h" #include "skas.h" +#include "tlb.h" static int add_mmap(unsigned long virt, unsigned long phys, unsigned long len, unsigned int prot, struct host_vm_op *ops, int *index, @@ -26,18 +23,18 @@ static int add_mmap(unsigned long virt, unsigned long phys, unsigned long len, int fd, ret = 0; fd = phys_mapping(phys, &offset); - if(*index != -1){ + if (*index != -1) { last = &ops[*index]; - if((last->type == MMAP) && + if ((last->type == MMAP) && (last->u.mmap.addr + last->u.mmap.len == virt) && (last->u.mmap.prot == prot) && (last->u.mmap.fd == fd) && - (last->u.mmap.offset + last->u.mmap.len == offset)){ + (last->u.mmap.offset + last->u.mmap.len == offset)) { last->u.mmap.len += len; return 0; } } - if(*index == last_filled){ + if (*index == last_filled) { ret = (*do_ops)(mmu, ops, last_filled, 0, flush); *index = -1; } @@ -62,16 +59,16 @@ static int add_munmap(unsigned long addr, unsigned long len, struct host_vm_op *last; int ret = 0; - if(*index != -1){ + if (*index != -1) { last = &ops[*index]; - if((last->type == MUNMAP) && - (last->u.munmap.addr + last->u.mmap.len == addr)){ + if ((last->type == MUNMAP) && + (last->u.munmap.addr + last->u.mmap.len == addr)) { last->u.munmap.len += len; return 0; } } - if(*index == last_filled){ + if (*index == last_filled) { ret = (*do_ops)(mmu, ops, last_filled, 0, flush); *index = -1; } @@ -92,17 +89,17 @@ static int add_mprotect(unsigned long addr, unsigned long len, struct host_vm_op *last; int ret = 0; - if(*index != -1){ + if (*index != -1) { last = &ops[*index]; - if((last->type == MPROTECT) && + if ((last->type == MPROTECT) && (last->u.mprotect.addr + last->u.mprotect.len == addr) && - (last->u.mprotect.prot == prot)){ + (last->u.mprotect.prot == prot)) { last->u.mprotect.len += len; return 0; } } - if(*index == last_filled){ + if (*index == last_filled) { ret = (*do_ops)(mmu, ops, last_filled, 0, flush); *index = -1; } @@ -141,15 +138,15 @@ static inline int update_pte_range(pmd_t *pmd, unsigned long addr, } prot = ((r ? UM_PROT_READ : 0) | (w ? UM_PROT_WRITE : 0) | (x ? UM_PROT_EXEC : 0)); - if(force || pte_newpage(*pte)){ - if(pte_present(*pte)) + if (force || pte_newpage(*pte)) { + if (pte_present(*pte)) ret = add_mmap(addr, pte_val(*pte) & PAGE_MASK, PAGE_SIZE, prot, ops, op_index, last_op, mmu, flush, do_ops); else ret = add_munmap(addr, PAGE_SIZE, ops, op_index, last_op, mmu, flush, do_ops); } - else if(pte_newprot(*pte)) + else if (pte_newprot(*pte)) ret = add_mprotect(addr, PAGE_SIZE, prot, ops, op_index, last_op, mmu, flush, do_ops); *pte = pte_mkuptodate(*pte); @@ -172,8 +169,8 @@ static inline int update_pmd_range(pud_t *pud, unsigned long addr, pmd = pmd_offset(pud, addr); do { next = pmd_addr_end(addr, end); - if(!pmd_present(*pmd)){ - if(force || pmd_newpage(*pmd)){ + if (!pmd_present(*pmd)) { + if (force || pmd_newpage(*pmd)) { ret = add_munmap(addr, next - addr, ops, op_index, last_op, mmu, flush, do_ops); @@ -202,8 +199,8 @@ static inline int update_pud_range(pgd_t *pgd, unsigned long addr, pud = pud_offset(pgd, addr); do { next = pud_addr_end(addr, end); - if(!pud_present(*pud)){ - if(force || pud_newpage(*pud)){ + if (!pud_present(*pud)) { + if (force || pud_newpage(*pud)) { ret = add_munmap(addr, next - addr, ops, op_index, last_op, mmu, flush, do_ops); @@ -233,8 +230,8 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr, pgd = pgd_offset(mm, addr); do { next = pgd_addr_end(addr, end_addr); - if(!pgd_present(*pgd)){ - if (force || pgd_newpage(*pgd)){ + if (!pgd_present(*pgd)) { + if (force || pgd_newpage(*pgd)) { ret = add_munmap(addr, next - addr, ops, &op_index, last_op, mmu, &flush, do_ops); @@ -246,12 +243,13 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr, do_ops); } while (pgd++, addr = next, ((addr != end_addr) && !ret)); - if(!ret) + if (!ret) ret = (*do_ops)(mmu, ops, op_index, 1, &flush); /* This is not an else because ret is modified above */ - if(ret) { - printk("fix_range_common: failed, killing current process\n"); + if (ret) { + printk(KERN_ERR "fix_range_common: failed, killing current " + "process\n"); force_sig(SIGKILL, current); } } @@ -267,17 +265,17 @@ int flush_tlb_kernel_range_common(unsigned long start, unsigned long end) int updated = 0, err; mm = &init_mm; - for(addr = start; addr < end;){ + for (addr = start; addr < end;) { pgd = pgd_offset(mm, addr); - if(!pgd_present(*pgd)){ + if (!pgd_present(*pgd)) { last = ADD_ROUND(addr, PGDIR_SIZE); - if(last > end) + if (last > end) last = end; - if(pgd_newpage(*pgd)){ + if (pgd_newpage(*pgd)) { updated = 1; err = os_unmap_memory((void *) addr, last - addr); - if(err < 0) + if (err < 0) panic("munmap failed, errno = %d\n", -err); } @@ -286,15 +284,15 @@ int flush_tlb_kernel_range_common(unsigned long start, unsigned long end) } pud = pud_offset(pgd, addr); - if(!pud_present(*pud)){ + if (!pud_present(*pud)) { last = ADD_ROUND(addr, PUD_SIZE); - if(last > end) + if (last > end) last = end; - if(pud_newpage(*pud)){ + if (pud_newpage(*pud)) { updated = 1; err = os_unmap_memory((void *) addr, last - addr); - if(err < 0) + if (err < 0) panic("munmap failed, errno = %d\n", -err); } @@ -303,15 +301,15 @@ int flush_tlb_kernel_range_common(unsigned long start, unsigned long end) } pmd = pmd_offset(pud, addr); - if(!pmd_present(*pmd)){ + if (!pmd_present(*pmd)) { last = ADD_ROUND(addr, PMD_SIZE); - if(last > end) + if (last > end) last = end; - if(pmd_newpage(*pmd)){ + if (pmd_newpage(*pmd)) { updated = 1; err = os_unmap_memory((void *) addr, last - addr); - if(err < 0) + if (err < 0) panic("munmap failed, errno = %d\n", -err); } @@ -320,25 +318,25 @@ int flush_tlb_kernel_range_common(unsigned long start, unsigned long end) } pte = pte_offset_kernel(pmd, addr); - if(!pte_present(*pte) || pte_newpage(*pte)){ + if (!pte_present(*pte) || pte_newpage(*pte)) { updated = 1; err = os_unmap_memory((void *) addr, PAGE_SIZE); - if(err < 0) + if (err < 0) panic("munmap failed, errno = %d\n", -err); - if(pte_present(*pte)) + if (pte_present(*pte)) map_memory(addr, pte_val(*pte) & PAGE_MASK, PAGE_SIZE, 1, 1, 1); } - else if(pte_newprot(*pte)){ + else if (pte_newprot(*pte)) { updated = 1; os_protect_memory((void *) addr, PAGE_SIZE, 1, 1, 1); } addr += PAGE_SIZE; } - return(updated); + return updated; } void flush_tlb_page(struct vm_area_struct *vma, unsigned long address) @@ -354,15 +352,15 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long address) address &= PAGE_MASK; pgd = pgd_offset(mm, address); - if(!pgd_present(*pgd)) + if (!pgd_present(*pgd)) goto kill; pud = pud_offset(pgd, address); - if(!pud_present(*pud)) + if (!pud_present(*pud)) goto kill; pmd = pmd_offset(pud, address); - if(!pmd_present(*pmd)) + if (!pmd_present(*pmd)) goto kill; pte = pte_offset_kernel(pmd, address); @@ -380,8 +378,8 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long address) mm_id = &mm->context.skas.id; prot = ((r ? UM_PROT_READ : 0) | (w ? UM_PROT_WRITE : 0) | (x ? UM_PROT_EXEC : 0)); - if(pte_newpage(*pte)){ - if(pte_present(*pte)){ + if (pte_newpage(*pte)) { + if (pte_present(*pte)) { unsigned long long offset; int fd; @@ -391,10 +389,10 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long address) } else err = unmap(mm_id, address, PAGE_SIZE, 1, &flush); } - else if(pte_newprot(*pte)) + else if (pte_newprot(*pte)) err = protect(mm_id, address, PAGE_SIZE, prot, 1, &flush); - if(err) + if (err) goto kill; *pte = pte_mkuptodate(*pte); @@ -402,28 +400,28 @@ void flush_tlb_page(struct vm_area_struct *vma, unsigned long address) return; kill: - printk("Failed to flush page for address 0x%lx\n", address); + printk(KERN_ERR "Failed to flush page for address 0x%lx\n", address); force_sig(SIGKILL, current); } pgd_t *pgd_offset_proc(struct mm_struct *mm, unsigned long address) { - return(pgd_offset(mm, address)); + return pgd_offset(mm, address); } pud_t *pud_offset_proc(pgd_t *pgd, unsigned long address) { - return(pud_offset(pgd, address)); + return pud_offset(pgd, address); } pmd_t *pmd_offset_proc(pud_t *pud, unsigned long address) { - return(pmd_offset(pud, address)); + return pmd_offset(pud, address); } pte_t *pte_offset_proc(pmd_t *pmd, unsigned long address) { - return(pte_offset_kernel(pmd, address)); + return pte_offset_kernel(pmd, address); } pte_t *addr_pte(struct task_struct *task, unsigned long addr) @@ -432,7 +430,7 @@ pte_t *addr_pte(struct task_struct *task, unsigned long addr) pud_t *pud = pud_offset(pgd, addr); pmd_t *pmd = pmd_offset(pud, addr); - return(pte_offset_map(pmd, addr)); + return pte_offset_map(pmd, addr); } void flush_tlb_all(void) @@ -452,18 +450,18 @@ void flush_tlb_kernel_vm(void) void __flush_tlb_one(unsigned long addr) { - flush_tlb_kernel_range_common(addr, addr + PAGE_SIZE); + flush_tlb_kernel_range_common(addr, addr + PAGE_SIZE); } static int do_ops(union mm_context *mmu, struct host_vm_op *ops, int last, int finished, void **flush) { struct host_vm_op *op; - int i, ret = 0; + int i, ret = 0; - for(i = 0; i <= last && !ret; i++){ - op = &ops[i]; - switch(op->type){ + for (i = 0; i <= last && !ret; i++) { + op = &ops[i]; + switch(op->type) { case MMAP: ret = map(&mmu->skas.id, op->u.mmap.addr, op->u.mmap.len, op->u.mmap.prot, @@ -480,7 +478,8 @@ static int do_ops(union mm_context *mmu, struct host_vm_op *ops, int last, finished, flush); break; default: - printk("Unknown op type %d in do_ops\n", op->type); + printk(KERN_ERR "Unknown op type %d in do_ops\n", + op->type); break; } } @@ -491,32 +490,33 @@ static int do_ops(union mm_context *mmu, struct host_vm_op *ops, int last, static void fix_range(struct mm_struct *mm, unsigned long start_addr, unsigned long end_addr, int force) { - if(!proc_mm && (end_addr > CONFIG_STUB_START)) - end_addr = CONFIG_STUB_START; + if (!proc_mm && (end_addr > CONFIG_STUB_START)) + end_addr = CONFIG_STUB_START; - fix_range_common(mm, start_addr, end_addr, force, do_ops); + fix_range_common(mm, start_addr, end_addr, force, do_ops); } void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end) { - if(vma->vm_mm == NULL) - flush_tlb_kernel_range_common(start, end); - else fix_range(vma->vm_mm, start, end, 0); + if (vma->vm_mm == NULL) + flush_tlb_kernel_range_common(start, end); + else fix_range(vma->vm_mm, start, end, 0); } void flush_tlb_mm(struct mm_struct *mm) { unsigned long end; - /* Don't bother flushing if this address space is about to be - * destroyed. - */ - if(atomic_read(&mm->mm_users) == 0) - return; + /* + * Don't bother flushing if this address space is about to be + * destroyed. + */ + if (atomic_read(&mm->mm_users) == 0) + return; end = proc_mm ? task_size : CONFIG_STUB_START; - fix_range(mm, 0, end, 0); + fix_range(mm, 0, end, 0); } void force_flush_all(void) @@ -524,7 +524,7 @@ void force_flush_all(void) struct mm_struct *mm = current->mm; struct vm_area_struct *vma = mm->mmap; - while(vma != NULL) { + while (vma != NULL) { fix_range(mm, vma->vm_start, vma->vm_end, 1); vma = vma->vm_next; } diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c index 5f3e13c365e5..1993e5e12256 100644 --- a/arch/um/kernel/um_arch.c +++ b/arch/um/kernel/um_arch.c @@ -1,39 +1,22 @@ /* - * Copyright (C) 2000, 2002 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include "linux/kernel.h" -#include "linux/sched.h" -#include "linux/notifier.h" -#include "linux/mm.h" -#include "linux/types.h" -#include "linux/tty.h" -#include "linux/init.h" -#include "linux/bootmem.h" -#include "linux/spinlock.h" -#include "linux/utsname.h" -#include "linux/sysrq.h" -#include "linux/seq_file.h" #include "linux/delay.h" +#include "linux/mm.h" #include "linux/module.h" +#include "linux/seq_file.h" +#include "linux/string.h" #include "linux/utsname.h" -#include "asm/page.h" #include "asm/pgtable.h" -#include "asm/ptrace.h" -#include "asm/elf.h" -#include "asm/user.h" +#include "asm/processor.h" #include "asm/setup.h" -#include "ubd_user.h" -#include "asm/current.h" -#include "kern_util.h" -#include "as-layout.h" #include "arch.h" +#include "as-layout.h" +#include "init.h" #include "kern.h" #include "mem_user.h" -#include "mem.h" -#include "initrd.h" -#include "init.h" #include "os.h" #include "skas.h" @@ -48,7 +31,7 @@ static void __init add_arg(char *arg) printf("add_arg: Too many command line arguments!\n"); exit(1); } - if(strlen(command_line) > 0) + if (strlen(command_line) > 0) strcat(command_line, " "); strcat(command_line, arg); } @@ -133,7 +116,7 @@ static int have_root __initdata = 0; /* Set in uml_mem_setup and modified in linux_main */ long long physmem_size = 32 * 1024 * 1024; -static char *usage_string = +static char *usage_string = "User Mode Linux v%s\n" " available at http://user-mode-linux.sourceforge.net/\n\n"; @@ -191,7 +174,7 @@ static int __init uml_ncpus_setup(char *line, int *add) __uml_setup("ncpus=", uml_ncpus_setup, "ncpus=<# of desired CPUs>\n" -" This tells an SMP kernel how many virtual processors to start.\n\n" +" This tells an SMP kernel how many virtual processors to start.\n\n" ); #endif @@ -223,9 +206,8 @@ static int __init uml_checksetup(char *line, int *add) int n; n = strlen(p->str); - if(!strncmp(line, p->str, n)){ - if (p->setup_func(line + n, add)) return 1; - } + if (!strncmp(line, p->str, n) && p->setup_func(line + n, add)) + return 1; p++; } return 0; @@ -236,7 +218,7 @@ static void __init uml_postsetup(void) initcall_t *p; p = &__uml_postsetup_start; - while(p < &__uml_postsetup_end){ + while(p < &__uml_postsetup_end) { (*p)(); p++; } @@ -272,16 +254,18 @@ int __init linux_main(int argc, char **argv) unsigned int i, add; char * mode; - for (i = 1; i < argc; i++){ - if((i == 1) && (argv[i][0] == ' ')) continue; + for (i = 1; i < argc; i++) { + if ((i == 1) && (argv[i][0] == ' ')) + continue; add = 1; uml_checksetup(argv[i], &add); if (add) add_arg(argv[i]); } - if(have_root == 0) + if (have_root == 0) add_arg(DEFAULT_COMMAND_LINE); + /* OS sanity checks that need to happen before the kernel runs */ os_early_checks(); can_do_skas(); @@ -302,12 +286,14 @@ int __init linux_main(int argc, char **argv) brk_start = (unsigned long) sbrk(0); - /* Increase physical memory size for exec-shield users - so they actually get what they asked for. This should - add zero for non-exec shield users */ + /* + * Increase physical memory size for exec-shield users + * so they actually get what they asked for. This should + * add zero for non-exec shield users + */ diff = UML_ROUND_UP(brk_start) - UML_ROUND_UP(&_end); - if(diff > 1024 * 1024){ + if (diff > 1024 * 1024) { printf("Adding %ld bytes to physical memory to account for " "exec-shield gap\n", diff); physmem_size += UML_ROUND_UP(brk_start) - UML_ROUND_UP(&_end); @@ -324,11 +310,12 @@ int __init linux_main(int argc, char **argv) iomem_size = (iomem_size + PAGE_SIZE - 1) & PAGE_MASK; max_physmem = get_kmem_end() - uml_physmem - iomem_size - MIN_VMALLOC; - /* Zones have to begin on a 1 << MAX_ORDER page boundary, + /* + * Zones have to begin on a 1 << MAX_ORDER page boundary, * so this makes sure that's true for highmem */ max_physmem &= ~((1 << (PAGE_SHIFT + MAX_ORDER)) - 1); - if(physmem_size + iomem_size > max_physmem){ + if (physmem_size + iomem_size > max_physmem) { highmem = physmem_size + iomem_size - max_physmem; physmem_size -= highmem; #ifndef CONFIG_HIGHMEM @@ -345,7 +332,7 @@ int __init linux_main(int argc, char **argv) start_vm = VMALLOC_START; setup_physmem(uml_physmem, uml_reserved, physmem_size, highmem); - if(init_maps(physmem_size, iomem_size, highmem)){ + if (init_maps(physmem_size, iomem_size, highmem)) { printf("Failed to allocate mem_map for %Lu bytes of physical " "memory and %Lu bytes of highmem\n", physmem_size, highmem); @@ -354,10 +341,11 @@ int __init linux_main(int argc, char **argv) virtmem_size = physmem_size; avail = get_kmem_end() - start_vm; - if(physmem_size > avail) virtmem_size = avail; + if (physmem_size > avail) + virtmem_size = avail; end_vm = start_vm + virtmem_size; - if(virtmem_size < physmem_size) + if (virtmem_size < physmem_size) printf("Kernel virtual memory size shrunk to %lu bytes\n", virtmem_size); diff --git a/arch/um/os-Linux/aio.c b/arch/um/os-Linux/aio.c index 11c2b01a92bd..68454daf958d 100644 --- a/arch/um/os-Linux/aio.c +++ b/arch/um/os-Linux/aio.c @@ -1,19 +1,19 @@ /* - * Copyright (C) 2004 Jeff Dike (jdike@addtoit.com) + * Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include <stdlib.h> #include <unistd.h> +#include <sched.h> #include <signal.h> #include <errno.h> -#include <sched.h> -#include <sys/syscall.h> -#include "os.h" +#include <sys/time.h> +#include <asm/unistd.h> #include "aio.h" #include "init.h" -#include "user.h" #include "kern_constants.h" +#include "os.h" +#include "user.h" struct aio_thread_req { enum aio_type type; @@ -27,7 +27,8 @@ struct aio_thread_req { #if defined(HAVE_AIO_ABI) #include <linux/aio_abi.h> -/* If we have the headers, we are going to build with AIO enabled. +/* + * If we have the headers, we are going to build with AIO enabled. * If we don't have aio in libc, we define the necessary stubs here. */ @@ -51,7 +52,8 @@ static long io_getevents(aio_context_t ctx_id, long min_nr, long nr, #endif -/* The AIO_MMAP cases force the mmapped page into memory here +/* + * The AIO_MMAP cases force the mmapped page into memory here * rather than in whatever place first touches the data. I used * to do this by touching the page, but that's delicate because * gcc is prone to optimizing that away. So, what's done here @@ -105,12 +107,12 @@ static int aio_thread(void *arg) signal(SIGWINCH, SIG_IGN); - while(1){ + while (1) { n = io_getevents(ctx, 1, 1, &event, NULL); - if(n < 0){ - if(errno == EINTR) + if (n < 0) { + if (errno == EINTR) continue; - printk("aio_thread - io_getevents failed, " + printk(UM_KERN_ERR "aio_thread - io_getevents failed, " "errno = %d\n", errno); } else { @@ -119,9 +121,9 @@ static int aio_thread(void *arg) .err = event.res }); reply_fd = ((struct aio_context *) reply.data)->reply_fd; err = write(reply_fd, &reply, sizeof(reply)); - if(err != sizeof(reply)) - printk("aio_thread - write failed, fd = %d, " - "err = %d\n", reply_fd, errno); + if (err != sizeof(reply)) + printk(UM_KERN_ERR "aio_thread - write failed, " + "fd = %d, err = %d\n", reply_fd, errno); } } return 0; @@ -136,10 +138,10 @@ static int do_not_aio(struct aio_thread_req *req) int n; actual = lseek64(req->io_fd, req->offset, SEEK_SET); - if(actual != req->offset) + if (actual != req->offset) return -errno; - switch(req->type){ + switch(req->type) { case AIO_READ: n = read(req->io_fd, req->buf, req->len); break; @@ -150,11 +152,12 @@ static int do_not_aio(struct aio_thread_req *req) n = read(req->io_fd, &c, sizeof(c)); break; default: - printk("do_not_aio - bad request type : %d\n", req->type); + printk(UM_KERN_ERR "do_not_aio - bad request type : %d\n", + req->type); return -EINVAL; } - if(n < 0) + if (n < 0) return -errno; return 0; } @@ -172,16 +175,18 @@ static int not_aio_thread(void *arg) int err; signal(SIGWINCH, SIG_IGN); - while(1){ + while (1) { err = read(aio_req_fd_r, &req, sizeof(req)); - if(err != sizeof(req)){ - if(err < 0) - printk("not_aio_thread - read failed, " - "fd = %d, err = %d\n", aio_req_fd_r, + if (err != sizeof(req)) { + if (err < 0) + printk(UM_KERN_ERR "not_aio_thread - " + "read failed, fd = %d, err = %d\n", + aio_req_fd_r, errno); else { - printk("not_aio_thread - short read, fd = %d, " - "length = %d\n", aio_req_fd_r, err); + printk(UM_KERN_ERR "not_aio_thread - short " + "read, fd = %d, length = %d\n", + aio_req_fd_r, err); } continue; } @@ -189,9 +194,9 @@ static int not_aio_thread(void *arg) reply = ((struct aio_thread_reply) { .data = req.aio, .err = err }); err = write(req.aio->reply_fd, &reply, sizeof(reply)); - if(err != sizeof(reply)) - printk("not_aio_thread - write failed, fd = %d, " - "err = %d\n", req.aio->reply_fd, errno); + if (err != sizeof(reply)) + printk(UM_KERN_ERR "not_aio_thread - write failed, " + "fd = %d, err = %d\n", req.aio->reply_fd, errno); } return 0; @@ -202,19 +207,19 @@ static int init_aio_24(void) int fds[2], err; err = os_pipe(fds, 1, 1); - if(err) + if (err) goto out; aio_req_fd_w = fds[0]; aio_req_fd_r = fds[1]; err = os_set_fd_block(aio_req_fd_w, 0); - if(err) + if (err) goto out_close_pipe; err = run_helper_thread(not_aio_thread, NULL, CLONE_FILES | CLONE_VM | SIGCHLD, &aio_stack); - if(err < 0) + if (err < 0) goto out_close_pipe; aio_pid = err; @@ -227,10 +232,11 @@ out_close_pipe: aio_req_fd_r = -1; out: #ifndef HAVE_AIO_ABI - printk("/usr/include/linux/aio_abi.h not present during build\n"); + printk(UM_KERN_INFO "/usr/include/linux/aio_abi.h not present during " + "build\n"); #endif - printk("2.6 host AIO support not used - falling back to I/O " - "thread\n"); + printk(UM_KERN_INFO "2.6 host AIO support not used - falling back to " + "I/O thread\n"); return 0; } @@ -240,21 +246,21 @@ static int init_aio_26(void) { int err; - if(io_setup(256, &ctx)){ + if (io_setup(256, &ctx)) { err = -errno; - printk("aio_thread failed to initialize context, err = %d\n", - errno); + printk(UM_KERN_ERR "aio_thread failed to initialize context, " + "err = %d\n", errno); return err; } err = run_helper_thread(aio_thread, NULL, CLONE_FILES | CLONE_VM | SIGCHLD, &aio_stack); - if(err < 0) + if (err < 0) return err; aio_pid = err; - printk("Using 2.6 host AIO\n"); + printk(UM_KERN_INFO "Using 2.6 host AIO\n"); return 0; } @@ -265,13 +271,13 @@ static int submit_aio_26(enum aio_type type, int io_fd, char *buf, int len, int err; err = do_aio(ctx, type, io_fd, buf, len, offset, aio); - if(err){ + if (err) { reply = ((struct aio_thread_reply) { .data = aio, .err = err }); err = write(aio->reply_fd, &reply, sizeof(reply)); - if(err != sizeof(reply)){ + if (err != sizeof(reply)) { err = -errno; - printk("submit_aio_26 - write failed, " + printk(UM_KERN_ERR "submit_aio_26 - write failed, " "fd = %d, err = %d\n", aio->reply_fd, -err); } else err = 0; @@ -319,23 +325,24 @@ static int init_aio(void) { int err; - if(!aio_24){ + if (!aio_24) { err = init_aio_26(); - if(err && (errno == ENOSYS)){ - printk("2.6 AIO not supported on the host - " - "reverting to 2.4 AIO\n"); + if (err && (errno == ENOSYS)) { + printk(UM_KERN_INFO "2.6 AIO not supported on the " + "host - reverting to 2.4 AIO\n"); aio_24 = 1; } else return err; } - if(aio_24) + if (aio_24) return init_aio_24(); return 0; } -/* The reason for the __initcall/__uml_exitcall asymmetry is that init_aio +/* + * The reason for the __initcall/__uml_exitcall asymmetry is that init_aio * needs to be called when the kernel is running because it calls run_helper, * which needs get_free_page. exit_aio is a __uml_exitcall because the generic * kernel does not run __exitcalls on shutdown, and can't because many of them @@ -366,7 +373,7 @@ static int submit_aio_24(enum aio_type type, int io_fd, char *buf, int len, int err; err = write(aio_req_fd_w, &req, sizeof(req)); - if(err == sizeof(req)) + if (err == sizeof(req)) err = 0; else err = -errno; @@ -378,9 +385,8 @@ int submit_aio(enum aio_type type, int io_fd, char *buf, int len, struct aio_context *aio) { aio->reply_fd = reply_fd; - if(aio_24) + if (aio_24) return submit_aio_24(type, io_fd, buf, len, offset, aio); - else { + else return submit_aio_26(type, io_fd, buf, len, offset, aio); - } } diff --git a/arch/um/os-Linux/file.c b/arch/um/os-Linux/file.c index f52006ee70e8..d463a8205637 100644 --- a/arch/um/os-Linux/file.c +++ b/arch/um/os-Linux/file.c @@ -267,9 +267,9 @@ void os_close_file(int fd) close(fd); } -int os_seek_file(int fd, __u64 offset) +int os_seek_file(int fd, unsigned long long offset) { - __u64 actual; + unsigned long long actual; actual = lseek64(fd, offset, SEEK_SET); if(actual != offset) diff --git a/arch/um/os-Linux/main.c b/arch/um/os-Linux/main.c index aeeecc634733..1518f7a45a24 100644 --- a/arch/um/os-Linux/main.c +++ b/arch/um/os-Linux/main.c @@ -1,27 +1,21 @@ /* - * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include <unistd.h> #include <stdio.h> #include <stdlib.h> -#include <string.h> -#include <signal.h> +#include <unistd.h> #include <errno.h> +#include <signal.h> +#include <string.h> #include <sys/resource.h> -#include <sys/mman.h> -#include <sys/user.h> -#include "kern_util.h" #include "as-layout.h" -#include "mem_user.h" -#include "irq_user.h" -#include "user.h" #include "init.h" -#include "uml-config.h" +#include "kern_constants.h" +#include "kern_util.h" #include "os.h" #include "um_malloc.h" -#include "kern_constants.h" #define PGD_BOUND (4 * 1024 * 1024) #define STACKSIZE (8 * 1024 * 1024) @@ -31,13 +25,13 @@ static void set_stklim(void) { struct rlimit lim; - if(getrlimit(RLIMIT_STACK, &lim) < 0){ + if (getrlimit(RLIMIT_STACK, &lim) < 0) { perror("getrlimit"); exit(1); } - if((lim.rlim_cur == RLIM_INFINITY) || (lim.rlim_cur > STACKSIZE)){ + if ((lim.rlim_cur == RLIM_INFINITY) || (lim.rlim_cur > STACKSIZE)) { lim.rlim_cur = STACKSIZE; - if(setrlimit(RLIMIT_STACK, &lim) < 0){ + if (setrlimit(RLIMIT_STACK, &lim) < 0) { perror("setrlimit"); exit(1); } @@ -49,7 +43,7 @@ static __init void do_uml_initcalls(void) initcall_t *call; call = &__uml_initcall_start; - while (call < &__uml_initcall_end){ + while (call < &__uml_initcall_end) { (*call)(); call++; } @@ -68,7 +62,8 @@ static void install_fatal_handler(int sig) /* All signals are enabled in this handler ... */ sigemptyset(&action.sa_mask); - /* ... including the signal being handled, plus we want the + /* + * ... including the signal being handled, plus we want the * handler reset to the default behavior, so that if an exit * handler is hanging for some reason, the UML will just die * after this signal is sent a second time. @@ -76,7 +71,7 @@ static void install_fatal_handler(int sig) action.sa_flags = SA_RESETHAND | SA_NODEFER; action.sa_restorer = NULL; action.sa_handler = last_ditch_exit; - if(sigaction(sig, &action, NULL) < 0){ + if (sigaction(sig, &action, NULL) < 0) { printf("failed to install handler for signal %d - errno = %d\n", errno); exit(1); @@ -92,7 +87,8 @@ static void setup_env_path(void) int path_len = 0; old_path = getenv("PATH"); - /* if no PATH variable is set or it has an empty value + /* + * if no PATH variable is set or it has an empty value * just use the default + /usr/lib/uml */ if (!old_path || (path_len = strlen(old_path)) == 0) { @@ -125,38 +121,41 @@ int __init main(int argc, char **argv, char **envp) setup_env_path(); new_argv = malloc((argc + 1) * sizeof(char *)); - if(new_argv == NULL){ + if (new_argv == NULL) { perror("Mallocing argv"); exit(1); } - for(i=0;i<argc;i++){ + for (i = 0; i < argc; i++) { new_argv[i] = strdup(argv[i]); - if(new_argv[i] == NULL){ + if (new_argv[i] == NULL) { perror("Mallocing an arg"); exit(1); } } new_argv[argc] = NULL; - /* Allow these signals to bring down a UML if all other + /* + * Allow these signals to bring down a UML if all other * methods of control fail. */ install_fatal_handler(SIGINT); install_fatal_handler(SIGTERM); install_fatal_handler(SIGHUP); - scan_elf_aux( envp); + scan_elf_aux(envp); do_uml_initcalls(); ret = linux_main(argc, argv); - /* Disable SIGPROF - I have no idea why libc doesn't do this or turn + /* + * Disable SIGPROF - I have no idea why libc doesn't do this or turn * off the profiling time, but UML dies with a SIGPROF just before * exiting when profiling is active. */ change_sig(SIGPROF, 0); - /* This signal stuff used to be in the reboot case. However, + /* + * This signal stuff used to be in the reboot case. However, * sometimes a SIGVTALRM can come in when we're halting (reproducably * when writing out gcov information, presumably because that takes * some time) and cause a segfault. @@ -167,17 +166,18 @@ int __init main(int argc, char **argv, char **envp) /* disable SIGIO for the fds and set SIGIO to be ignored */ err = deactivate_all_fds(); - if(err) + if (err) printf("deactivate_all_fds failed, errno = %d\n", -err); - /* Let any pending signals fire now. This ensures + /* + * Let any pending signals fire now. This ensures * that they won't be delivered after the exec, when * they are definitely not expected. */ unblock_signals(); /* Reboot */ - if(ret){ + if (ret) { printf("\n"); execvp(new_argv[0], new_argv); perror("Failed to exec kernel"); @@ -193,17 +193,18 @@ void *__wrap_malloc(int size) { void *ret; - if(!kmalloc_ok) + if (!kmalloc_ok) return __real_malloc(size); - else if(size <= UM_KERN_PAGE_SIZE) + else if (size <= UM_KERN_PAGE_SIZE) /* finding contiguous pages can be hard*/ ret = kmalloc(size, UM_GFP_KERNEL); else ret = vmalloc(size); - /* glibc people insist that if malloc fails, errno should be + /* + * glibc people insist that if malloc fails, errno should be * set by malloc as well. So we do. */ - if(ret == NULL) + if (ret == NULL) errno = ENOMEM; return ret; @@ -213,7 +214,7 @@ void *__wrap_calloc(int n, int size) { void *ptr = __wrap_malloc(n * size); - if(ptr == NULL) + if (ptr == NULL) return NULL; memset(ptr, 0, n * size); return ptr; @@ -227,7 +228,8 @@ void __wrap_free(void *ptr) { unsigned long addr = (unsigned long) ptr; - /* We need to know how the allocation happened, so it can be correctly + /* + * We need to know how the allocation happened, so it can be correctly * freed. This is done by seeing what region of memory the pointer is * in - * physical memory - kmalloc/kfree @@ -245,12 +247,12 @@ void __wrap_free(void *ptr) * there is a possibility for memory leaks. */ - if((addr >= uml_physmem) && (addr < high_physmem)){ - if(kmalloc_ok) + if ((addr >= uml_physmem) && (addr < high_physmem)) { + if (kmalloc_ok) kfree(ptr); } - else if((addr >= start_vm) && (addr < end_vm)){ - if(kmalloc_ok) + else if ((addr >= start_vm) && (addr < end_vm)) { + if (kmalloc_ok) vfree(ptr); } else __real_free(ptr); diff --git a/arch/um/os-Linux/process.c b/arch/um/os-Linux/process.c index a955e9bcd04d..b2e0d8c4258c 100644 --- a/arch/um/os-Linux/process.c +++ b/arch/um/os-Linux/process.c @@ -1,27 +1,23 @@ -/* - * Copyright (C) 2002 Jeff Dike (jdike@addtoit.com) +/* + * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include <unistd.h> #include <stdio.h> +#include <unistd.h> #include <errno.h> #include <signal.h> #include <sys/mman.h> +#include <sys/ptrace.h> #include <sys/wait.h> -#include <sys/mman.h> -#include <sys/syscall.h> -#include "ptrace_user.h" +#include <asm/unistd.h> +#include "init.h" +#include "kern_constants.h" +#include "longjmp.h" #include "os.h" -#include "user.h" #include "process.h" -#include "irq_user.h" -#include "kern_util.h" -#include "longjmp.h" #include "skas_ptrace.h" -#include "kern_constants.h" -#include "uml-config.h" -#include "init.h" +#include "user.h" #define ARBITRARY_ADDR -1 #define FAILURE_PID -1 @@ -37,24 +33,25 @@ unsigned long os_process_pc(int pid) sprintf(proc_stat, "/proc/%d/stat", pid); fd = os_open_file(proc_stat, of_read(OPENFLAGS()), 0); - if(fd < 0){ - printk("os_process_pc - couldn't open '%s', err = %d\n", - proc_stat, -fd); + if (fd < 0) { + printk(UM_KERN_ERR "os_process_pc - couldn't open '%s', " + "err = %d\n", proc_stat, -fd); return ARBITRARY_ADDR; } CATCH_EINTR(err = read(fd, buf, sizeof(buf))); - if(err < 0){ - printk("os_process_pc - couldn't read '%s', err = %d\n", - proc_stat, errno); + if (err < 0) { + printk(UM_KERN_ERR "os_process_pc - couldn't read '%s', " + "err = %d\n", proc_stat, errno); os_close_file(fd); return ARBITRARY_ADDR; } os_close_file(fd); pc = ARBITRARY_ADDR; - if(sscanf(buf, "%*d " COMM_SCANF " %*c %*d %*d %*d %*d %*d %*d %*d " + if (sscanf(buf, "%*d " COMM_SCANF " %*c %*d %*d %*d %*d %*d %*d %*d " "%*d %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d " - "%*d %*d %*d %*d %*d %lu", &pc) != 1){ - printk("os_process_pc - couldn't find pc in '%s'\n", buf); + "%*d %*d %*d %*d %*d %lu", &pc) != 1) { + printk(UM_KERN_ERR "os_process_pc - couldn't find pc in '%s'\n", + buf); } return pc; } @@ -65,28 +62,29 @@ int os_process_parent(int pid) char data[256]; int parent, n, fd; - if(pid == -1) + if (pid == -1) return -1; snprintf(stat, sizeof(stat), "/proc/%d/stat", pid); fd = os_open_file(stat, of_read(OPENFLAGS()), 0); - if(fd < 0){ - printk("Couldn't open '%s', err = %d\n", stat, -fd); + if (fd < 0) { + printk(UM_KERN_ERR "Couldn't open '%s', err = %d\n", stat, -fd); return FAILURE_PID; } CATCH_EINTR(n = read(fd, data, sizeof(data))); os_close_file(fd); - if(n < 0){ - printk("Couldn't read '%s', err = %d\n", stat, errno); + if (n < 0) { + printk(UM_KERN_ERR "Couldn't read '%s', err = %d\n", stat, + errno); return FAILURE_PID; } parent = FAILURE_PID; n = sscanf(data, "%*d " COMM_SCANF " %*c %d", &parent); - if(n != 1) - printk("Failed to scan '%s'\n", data); + if (n != 1) + printk(UM_KERN_ERR "Failed to scan '%s'\n", data); return parent; } @@ -99,9 +97,8 @@ void os_stop_process(int pid) void os_kill_process(int pid, int reap_child) { kill(pid, SIGKILL); - if(reap_child) + if (reap_child) CATCH_EINTR(waitpid(pid, NULL, 0)); - } /* This is here uniquely to have access to the userspace errno, i.e. the one @@ -129,7 +126,7 @@ void os_kill_ptraced_process(int pid, int reap_child) kill(pid, SIGKILL); ptrace(PTRACE_KILL, pid); ptrace(PTRACE_CONT, pid); - if(reap_child) + if (reap_child) CATCH_EINTR(waitpid(pid, NULL, 0)); } @@ -153,34 +150,35 @@ int os_map_memory(void *virt, int fd, unsigned long long off, unsigned long len, void *loc; int prot; - prot = (r ? PROT_READ : 0) | (w ? PROT_WRITE : 0) | + prot = (r ? PROT_READ : 0) | (w ? PROT_WRITE : 0) | (x ? PROT_EXEC : 0); loc = mmap64((void *) virt, len, prot, MAP_SHARED | MAP_FIXED, fd, off); - if(loc == MAP_FAILED) + if (loc == MAP_FAILED) return -errno; return 0; } int os_protect_memory(void *addr, unsigned long len, int r, int w, int x) { - int prot = ((r ? PROT_READ : 0) | (w ? PROT_WRITE : 0) | + int prot = ((r ? PROT_READ : 0) | (w ? PROT_WRITE : 0) | (x ? PROT_EXEC : 0)); - if(mprotect(addr, len, prot) < 0) + if (mprotect(addr, len, prot) < 0) return -errno; - return 0; + + return 0; } int os_unmap_memory(void *addr, int len) { - int err; + int err; - err = munmap(addr, len); - if(err < 0) + err = munmap(addr, len); + if (err < 0) return -errno; - return 0; + return 0; } #ifndef MADV_REMOVE @@ -192,7 +190,7 @@ int os_drop_memory(void *addr, int length) int err; err = madvise(addr, length, MADV_REMOVE); - if(err < 0) + if (err < 0) err = -errno; return err; } @@ -202,22 +200,24 @@ int __init can_drop_memory(void) void *addr; int fd, ok = 0; - printk("Checking host MADV_REMOVE support..."); + printk(UM_KERN_INFO "Checking host MADV_REMOVE support..."); fd = create_mem_file(UM_KERN_PAGE_SIZE); - if(fd < 0){ - printk("Creating test memory file failed, err = %d\n", -fd); + if (fd < 0) { + printk(UM_KERN_ERR "Creating test memory file failed, " + "err = %d\n", -fd); goto out; } addr = mmap64(NULL, UM_KERN_PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); - if(addr == MAP_FAILED){ - printk("Mapping test memory file failed, err = %d\n", -errno); + if (addr == MAP_FAILED) { + printk(UM_KERN_ERR "Mapping test memory file failed, " + "err = %d\n", -errno); goto out_close; } - if(madvise(addr, UM_KERN_PAGE_SIZE, MADV_REMOVE) != 0){ - printk("MADV_REMOVE failed, err = %d\n", -errno); + if (madvise(addr, UM_KERN_PAGE_SIZE, MADV_REMOVE) != 0) { + printk(UM_KERN_ERR "MADV_REMOVE failed, err = %d\n", -errno); goto out_unmap; } @@ -256,7 +256,7 @@ int run_kernel_thread(int (*fn)(void *), void *arg, void **jmp_ptr) *jmp_ptr = &buf; n = UML_SETJMP(&buf); - if(n != 0) + if (n != 0) return n; (*fn)(arg); return 0; diff --git a/arch/um/os-Linux/registers.c b/arch/um/os-Linux/registers.c index ce0b791160e6..14732f98e0a2 100644 --- a/arch/um/os-Linux/registers.c +++ b/arch/um/os-Linux/registers.c @@ -1,13 +1,14 @@ /* * Copyright (C) 2004 PathScale, Inc + * Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ #include <errno.h> #include <string.h> #include <sys/ptrace.h> -#include "user.h" #include "sysdep/ptrace.h" +#include "user.h" /* This is set once at boot time and not changed thereafter */ @@ -23,7 +24,7 @@ void save_registers(int pid, struct uml_pt_regs *regs) int err; err = ptrace(PTRACE_GETREGS, pid, 0, regs->regs); - if(err < 0) + if (err < 0) panic("save_registers - saving registers failed, errno = %d\n", errno); } @@ -33,7 +34,7 @@ void restore_registers(int pid, struct uml_pt_regs *regs) int err; err = ptrace(PTRACE_SETREGS, pid, 0, regs->regs); - if(err < 0) + if (err < 0) panic("restore_registers - saving registers failed, " "errno = %d\n", errno); } @@ -43,7 +44,7 @@ void init_registers(int pid) int err; err = ptrace(PTRACE_GETREGS, pid, 0, exec_regs); - if(err) + if (err) panic("check_ptrace : PTRACE_GETREGS failed, errno = %d", errno); } diff --git a/arch/um/os-Linux/signal.c b/arch/um/os-Linux/signal.c index 583424b9797d..49c113b576b7 100644 --- a/arch/um/os-Linux/signal.c +++ b/arch/um/os-Linux/signal.c @@ -1,24 +1,21 @@ /* * Copyright (C) 2004 PathScale, Inc + * Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include <signal.h> -#include <stdio.h> -#include <unistd.h> #include <stdlib.h> -#include <errno.h> #include <stdarg.h> -#include <string.h> -#include <sys/mman.h> -#include "user.h" -#include "signal_kern.h" -#include "sysdep/sigcontext.h" -#include "sysdep/barrier.h" -#include "sigcontext.h" +#include <errno.h> +#include <signal.h> +#include <strings.h> #include "os.h" +#include "sysdep/barrier.h" +#include "sysdep/sigcontext.h" +#include "user.h" -/* These are the asynchronous signals. SIGVTALRM and SIGARLM are handled +/* + * These are the asynchronous signals. SIGVTALRM and SIGARLM are handled * together under SIGVTALRM_BIT. SIGPROF is excluded because we want to * be able to profile all of UML, not just the non-critical sections. If * profiling is not thread-safe, then that is not my problem. We can disable @@ -33,7 +30,8 @@ #define SIGALRM_BIT 2 #define SIGALRM_MASK (1 << SIGALRM_BIT) -/* These are used by both the signal handlers and +/* + * These are used by both the signal handlers and * block/unblock_signals. I don't want modifications cached in a * register - they must go straight to memory. */ @@ -45,7 +43,7 @@ void sig_handler(int sig, struct sigcontext *sc) int enabled; enabled = signals_enabled; - if(!enabled && (sig == SIGIO)){ + if (!enabled && (sig == SIGIO)) { pending |= SIGIO_MASK; return; } @@ -61,16 +59,16 @@ static void real_alarm_handler(int sig, struct sigcontext *sc) { struct uml_pt_regs regs; - if(sig == SIGALRM) + if (sig == SIGALRM) switch_timers(0); - if(sc != NULL) + if (sc != NULL) copy_sc(®s, sc); regs.is_user = 0; unblock_signals(); timer_handler(sig, ®s); - if(sig == SIGALRM) + if (sig == SIGALRM) switch_timers(1); } @@ -79,8 +77,8 @@ void alarm_handler(int sig, struct sigcontext *sc) int enabled; enabled = signals_enabled; - if(!signals_enabled){ - if(sig == SIGVTALRM) + if (!signals_enabled) { + if (sig == SIGVTALRM) pending |= SIGVTALRM_MASK; else pending |= SIGALRM_MASK; @@ -99,7 +97,7 @@ void set_sigstack(void *sig_stack, int size) .ss_sp = (__ptr_t) sig_stack, .ss_size = size - sizeof(void *) }); - if(sigaltstack(&stack, NULL) != 0) + if (sigaltstack(&stack, NULL) != 0) panic("enabling signal stack failed, errno = %d\n", errno); } @@ -109,7 +107,7 @@ void remove_sigstack(void) .ss_sp = NULL, .ss_size = 0 }); - if(sigaltstack(&stack, NULL) != 0) + if (sigaltstack(&stack, NULL) != 0) panic("disabling signal stack failed, errno = %d\n", errno); } @@ -133,26 +131,27 @@ void handle_signal(int sig, struct sigcontext *sc) * with this interrupt. */ bail = to_irq_stack(&pending); - if(bail) + if (bail) return; nested = pending & 1; pending &= ~1; - while((sig = ffs(pending)) != 0){ + while ((sig = ffs(pending)) != 0){ sig--; pending &= ~(1 << sig); (*handlers[sig])(sig, sc); } - /* Again, pending comes back with a mask of signals + /* + * Again, pending comes back with a mask of signals * that arrived while tearing down the stack. If this * is non-zero, we just go back, set up the stack * again, and handle the new interrupts. */ - if(!nested) + if (!nested) pending = from_irq_stack(nested); - } while(pending); + } while (pending); } extern void hard_handler(int sig); @@ -170,18 +169,18 @@ void set_handler(int sig, void (*handler)(int), int flags, ...) sigemptyset(&action.sa_mask); va_start(ap, flags); - while((mask = va_arg(ap, int)) != -1) + while ((mask = va_arg(ap, int)) != -1) sigaddset(&action.sa_mask, mask); va_end(ap); action.sa_flags = flags; action.sa_restorer = NULL; - if(sigaction(sig, &action, NULL) < 0) + if (sigaction(sig, &action, NULL) < 0) panic("sigaction failed - errno = %d\n", errno); sigemptyset(&sig_mask); sigaddset(&sig_mask, sig); - if(sigprocmask(SIG_UNBLOCK, &sig_mask, NULL) < 0) + if (sigprocmask(SIG_UNBLOCK, &sig_mask, NULL) < 0) panic("sigprocmask failed - errno = %d\n", errno); } @@ -192,13 +191,14 @@ int change_sig(int signal, int on) sigemptyset(&sigset); sigaddset(&sigset, signal); sigprocmask(on ? SIG_UNBLOCK : SIG_BLOCK, &sigset, &old); - return(!sigismember(&old, signal)); + return !sigismember(&old, signal); } void block_signals(void) { signals_enabled = 0; - /* This must return with signals disabled, so this barrier + /* + * This must return with signals disabled, so this barrier * ensures that writes are flushed out before the return. * This might matter if gcc figures out how to inline this and * decides to shuffle this code into the caller. @@ -210,27 +210,31 @@ void unblock_signals(void) { int save_pending; - if(signals_enabled == 1) + if (signals_enabled == 1) return; - /* We loop because the IRQ handler returns with interrupts off. So, + /* + * We loop because the IRQ handler returns with interrupts off. So, * interrupts may have arrived and we need to re-enable them and * recheck pending. */ - while(1){ - /* Save and reset save_pending after enabling signals. This + while(1) { + /* + * Save and reset save_pending after enabling signals. This * way, pending won't be changed while we're reading it. */ signals_enabled = 1; - /* Setting signals_enabled and reading pending must + /* + * Setting signals_enabled and reading pending must * happen in this order. */ mb(); save_pending = pending; - if(save_pending == 0){ - /* This must return with signals enabled, so + if (save_pending == 0) { + /* + * This must return with signals enabled, so * this barrier ensures that writes are * flushed out before the return. This might * matter if gcc figures out how to inline @@ -243,24 +247,26 @@ void unblock_signals(void) pending = 0; - /* We have pending interrupts, so disable signals, as the + /* + * We have pending interrupts, so disable signals, as the * handlers expect them off when they are called. They will * be enabled again above. */ signals_enabled = 0; - /* Deal with SIGIO first because the alarm handler might + /* + * Deal with SIGIO first because the alarm handler might * schedule, leaving the pending SIGIO stranded until we come * back here. */ - if(save_pending & SIGIO_MASK) + if (save_pending & SIGIO_MASK) sig_handler_common_skas(SIGIO, NULL); - if(save_pending & SIGALRM_MASK) + if (save_pending & SIGALRM_MASK) real_alarm_handler(SIGALRM, NULL); - if(save_pending & SIGVTALRM_MASK) + if (save_pending & SIGVTALRM_MASK) real_alarm_handler(SIGVTALRM, NULL); } } @@ -273,11 +279,11 @@ int get_signals(void) int set_signals(int enable) { int ret; - if(signals_enabled == enable) + if (signals_enabled == enable) return enable; ret = signals_enabled; - if(enable) + if (enable) unblock_signals(); else block_signals(); diff --git a/arch/um/os-Linux/skas/mem.c b/arch/um/os-Linux/skas/mem.c index ae7685710c46..d58d11179bb7 100644 --- a/arch/um/os-Linux/skas/mem.c +++ b/arch/um/os-Linux/skas/mem.c @@ -1,30 +1,25 @@ /* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include <signal.h> +#include <stddef.h> +#include <unistd.h> #include <errno.h> #include <string.h> -#include <unistd.h> #include <sys/mman.h> -#include <sys/wait.h> -#include <asm/unistd.h> -#include "mem_user.h" -#include "mem.h" -#include "skas.h" -#include "user.h" +#include "init.h" +#include "kern_constants.h" +#include "mm_id.h" #include "os.h" #include "proc_mm.h" #include "ptrace_user.h" -#include "kern_util.h" -#include "task.h" #include "registers.h" -#include "uml-config.h" +#include "skas.h" +#include "user.h" #include "sysdep/ptrace.h" #include "sysdep/stub.h" -#include "init.h" -#include "kern_constants.h" +#include "uml-config.h" extern unsigned long batch_syscall_stub, __syscall_stub_start; @@ -33,7 +28,7 @@ extern void wait_stub_done(int pid); static inline unsigned long *check_init_stack(struct mm_id * mm_idp, unsigned long *stack) { - if(stack == NULL) { + if (stack == NULL) { stack = (unsigned long *) mm_idp->stack + 2; *stack = 0; } @@ -67,29 +62,30 @@ static inline long do_syscall_stub(struct mm_id * mm_idp, void **addr) unsigned long * syscall; int err, pid = mm_idp->u.pid; - if(proc_mm) + if (proc_mm) /* FIXME: Need to look up userspace_pid by cpu */ pid = userspace_pid[0]; multi_count++; n = ptrace_setregs(pid, syscall_regs); - if(n < 0){ - printk("Registers - \n"); - for(i = 0; i < MAX_REG_NR; i++) - printk("\t%d\t0x%lx\n", i, syscall_regs[i]); + if (n < 0) { + printk(UM_KERN_ERR "Registers - \n"); + for (i = 0; i < MAX_REG_NR; i++) + printk(UM_KERN_ERR "\t%d\t0x%lx\n", i, syscall_regs[i]); panic("do_syscall_stub : PTRACE_SETREGS failed, errno = %d\n", -n); } err = ptrace(PTRACE_CONT, pid, 0, 0); - if(err) + if (err) panic("Failed to continue stub, pid = %d, errno = %d\n", pid, errno); wait_stub_done(pid); - /* When the stub stops, we find the following values on the + /* + * When the stub stops, we find the following values on the * beginning of the stack: * (long )return_value * (long )offset to failed sycall-data (0, if no error) @@ -99,24 +95,25 @@ static inline long do_syscall_stub(struct mm_id * mm_idp, void **addr) if (offset) { data = (unsigned long *)(mm_idp->stack + offset - UML_CONFIG_STUB_DATA); - printk("do_syscall_stub : ret = %ld, offset = %ld, " + printk(UM_KERN_ERR "do_syscall_stub : ret = %ld, offset = %ld, " "data = %p\n", ret, offset, data); syscall = (unsigned long *)((unsigned long)data + data[0]); - printk("do_syscall_stub: syscall %ld failed, return value = " - "0x%lx, expected return value = 0x%lx\n", + printk(UM_KERN_ERR "do_syscall_stub: syscall %ld failed, " + "return value = 0x%lx, expected return value = 0x%lx\n", syscall[0], ret, syscall[7]); - printk(" syscall parameters: " + printk(UM_KERN_ERR " syscall parameters: " "0x%lx 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx\n", syscall[1], syscall[2], syscall[3], syscall[4], syscall[5], syscall[6]); - for(n = 1; n < data[0]/sizeof(long); n++) { - if(n == 1) - printk(" additional syscall data:"); - if(n % 4 == 1) - printk("\n "); + for (n = 1; n < data[0]/sizeof(long); n++) { + if (n == 1) + printk(UM_KERN_ERR " additional syscall " + "data:"); + if (n % 4 == 1) + printk("\n" UM_KERN_ERR " "); printk(" 0x%lx", data[n]); } - if(n > 1) + if (n > 1) printk("\n"); } else ret = 0; @@ -132,7 +129,7 @@ long run_syscall_stub(struct mm_id * mm_idp, int syscall, { unsigned long *stack = check_init_stack(mm_idp, *addr); - if(done && *addr == NULL) + if (done && *addr == NULL) single_count++; *stack += sizeof(long); @@ -149,8 +146,8 @@ long run_syscall_stub(struct mm_id * mm_idp, int syscall, *stack = 0; multi_op_count++; - if(!done && ((((unsigned long) stack) & ~UM_KERN_PAGE_MASK) < - UM_KERN_PAGE_SIZE - 10 * sizeof(long))){ + if (!done && ((((unsigned long) stack) & ~UM_KERN_PAGE_MASK) < + UM_KERN_PAGE_SIZE - 10 * sizeof(long))) { *addr = stack; return 0; } @@ -165,14 +162,15 @@ long syscall_stub_data(struct mm_id * mm_idp, unsigned long *stack; int ret = 0; - /* If *addr still is uninitialized, it *must* contain NULL. + /* + * If *addr still is uninitialized, it *must* contain NULL. * Thus in this case do_syscall_stub correctly won't be called. */ - if((((unsigned long) *addr) & ~UM_KERN_PAGE_MASK) >= + if ((((unsigned long) *addr) & ~UM_KERN_PAGE_MASK) >= UM_KERN_PAGE_SIZE - (10 + data_count) * sizeof(long)) { ret = do_syscall_stub(mm_idp, addr); /* in case of error, don't overwrite data on stack */ - if(ret) + if (ret) return ret; } @@ -194,7 +192,7 @@ int map(struct mm_id * mm_idp, unsigned long virt, unsigned long len, int prot, { int ret; - if(proc_mm){ + if (proc_mm) { struct proc_mm_op map; int fd = mm_idp->u.mm_fd; @@ -210,9 +208,10 @@ int map(struct mm_id * mm_idp, unsigned long virt, unsigned long len, int prot, .offset= offset } } } ); CATCH_EINTR(ret = write(fd, &map, sizeof(map))); - if(ret != sizeof(map)){ + if (ret != sizeof(map)) { ret = -errno; - printk("map : /proc/mm map failed, err = %d\n", -ret); + printk(UM_KERN_ERR "map : /proc/mm map failed, " + "err = %d\n", -ret); } else ret = 0; } @@ -233,7 +232,7 @@ int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len, { int ret; - if(proc_mm){ + if (proc_mm) { struct proc_mm_op unmap; int fd = mm_idp->u.mm_fd; @@ -244,9 +243,10 @@ int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len, (unsigned long) addr, .len = len } } } ); CATCH_EINTR(ret = write(fd, &unmap, sizeof(unmap))); - if(ret != sizeof(unmap)){ + if (ret != sizeof(unmap)) { ret = -errno; - printk("unmap - proc_mm write returned %d\n", ret); + printk(UM_KERN_ERR "unmap - proc_mm write returned " + "%d\n", ret); } else ret = 0; } @@ -267,7 +267,7 @@ int protect(struct mm_id * mm_idp, unsigned long addr, unsigned long len, struct proc_mm_op protect; int ret; - if(proc_mm){ + if (proc_mm) { int fd = mm_idp->u.mm_fd; protect = ((struct proc_mm_op) { .op = MM_MPROTECT, @@ -279,9 +279,9 @@ int protect(struct mm_id * mm_idp, unsigned long addr, unsigned long len, .prot = prot } } } ); CATCH_EINTR(ret = write(fd, &protect, sizeof(protect))); - if(ret != sizeof(protect)){ + if (ret != sizeof(protect)) { ret = -errno; - printk("protect failed, err = %d", -ret); + printk(UM_KERN_ERR "protect failed, err = %d", -ret); } else ret = 0; } diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c index eb027673f357..e12d18cc77da 100644 --- a/arch/um/os-Linux/skas/process.c +++ b/arch/um/os-Linux/skas/process.c @@ -1,48 +1,38 @@ /* - * Copyright (C) 2002- 2004 Jeff Dike (jdike@addtoit.com) + * Copyright (C) 2002- 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ #include <stdlib.h> -#include <string.h> #include <unistd.h> -#include <errno.h> -#include <signal.h> #include <sched.h> -#include "ptrace_user.h" -#include <sys/wait.h> +#include <errno.h> +#include <string.h> #include <sys/mman.h> -#include <sys/user.h> -#include <sys/time.h> -#include <sys/syscall.h> -#include <asm/types.h> -#include "user.h" -#include "sysdep/ptrace.h" -#include "kern_util.h" -#include "skas.h" -#include "stub-data.h" -#include "mm_id.h" -#include "sysdep/sigcontext.h" -#include "sysdep/stub.h" -#include "os.h" -#include "proc_mm.h" -#include "skas_ptrace.h" +#include <sys/ptrace.h> +#include <sys/wait.h> +#include <asm/unistd.h> +#include "as-layout.h" #include "chan_user.h" -#include "registers.h" +#include "kern_constants.h" #include "mem.h" -#include "uml-config.h" +#include "os.h" #include "process.h" -#include "longjmp.h" -#include "kern_constants.h" -#include "as-layout.h" +#include "proc_mm.h" +#include "ptrace_user.h" +#include "registers.h" +#include "skas.h" +#include "skas_ptrace.h" +#include "user.h" +#include "sysdep/stub.h" int is_skas_winch(int pid, int fd, void *data) { - if(pid != os_getpgrp()) - return(0); + if (pid != os_getpgrp()) + return 0; register_winch_irq(-1, fd, -1, data, 0); - return(1); + return 1; } static int ptrace_dump_regs(int pid) @@ -50,13 +40,12 @@ static int ptrace_dump_regs(int pid) unsigned long regs[MAX_REG_NR]; int i; - if(ptrace(PTRACE_GETREGS, pid, 0, regs) < 0) + if (ptrace(PTRACE_GETREGS, pid, 0, regs) < 0) return -errno; - else { - printk("Stub registers -\n"); - for(i = 0; i < ARRAY_SIZE(regs); i++) - printk("\t%d - %lx\n", i, regs[i]); - } + + printk(UM_KERN_ERR "Stub registers -\n"); + for (i = 0; i < ARRAY_SIZE(regs); i++) + printk(UM_KERN_ERR "\t%d - %lx\n", i, regs[i]); return 0; } @@ -74,27 +63,28 @@ void wait_stub_done(int pid) { int n, status, err; - while(1){ + while (1) { CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED)); - if((n < 0) || !WIFSTOPPED(status)) + if ((n < 0) || !WIFSTOPPED(status)) goto bad_wait; - if(((1 << WSTOPSIG(status)) & STUB_SIG_MASK) == 0) + if (((1 << WSTOPSIG(status)) & STUB_SIG_MASK) == 0) break; err = ptrace(PTRACE_CONT, pid, 0, 0); - if(err) + if (err) panic("wait_stub_done : continue failed, errno = %d\n", errno); } - if(((1 << WSTOPSIG(status)) & STUB_DONE_MASK) != 0) + if (((1 << WSTOPSIG(status)) & STUB_DONE_MASK) != 0) return; bad_wait: err = ptrace_dump_regs(pid); - if(err) - printk("Failed to get registers from stub, errno = %d\n", -err); + if (err) + printk(UM_KERN_ERR "Failed to get registers from stub, " + "errno = %d\n", -err); panic("wait_stub_done : failed to wait for SIGUSR1/SIGTRAP, pid = %d, " "n = %d, errno = %d, status = 0x%x\n", pid, n, errno, status); } @@ -105,9 +95,9 @@ void get_skas_faultinfo(int pid, struct faultinfo * fi) { int err; - if(ptrace_faultinfo){ + if (ptrace_faultinfo) { err = ptrace(PTRACE_FAULTINFO, pid, 0, fi); - if(err) + if (err) panic("get_skas_faultinfo - PTRACE_FAULTINFO failed, " "errno = %d\n", errno); @@ -119,12 +109,13 @@ void get_skas_faultinfo(int pid, struct faultinfo * fi) } else { err = ptrace(PTRACE_CONT, pid, 0, SIGSEGV); - if(err) + if (err) panic("Failed to continue stub, pid = %d, errno = %d\n", pid, errno); wait_stub_done(pid); - /* faultinfo is prepared by the stub-segv-handler at start of + /* + * faultinfo is prepared by the stub-segv-handler at start of * the stub stack page. We just have to copy it. */ memcpy(fi, (void *)current_stub_stack(), sizeof(*fi)); @@ -137,8 +128,12 @@ static void handle_segv(int pid, struct uml_pt_regs * regs) segv(regs->faultinfo, 0, 1, NULL); } -/*To use the same value of using_sysemu as the caller, ask it that value (in local_using_sysemu)*/ -static void handle_trap(int pid, struct uml_pt_regs *regs, int local_using_sysemu) +/* + * To use the same value of using_sysemu as the caller, ask it that value + * (in local_using_sysemu + */ +static void handle_trap(int pid, struct uml_pt_regs *regs, + int local_using_sysemu) { int err, status; @@ -149,22 +144,22 @@ static void handle_trap(int pid, struct uml_pt_regs *regs, int local_using_sysem { err = ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_NR_OFFSET, __NR_getpid); - if(err < 0) - panic("handle_trap - nullifying syscall failed errno = %d\n", - errno); + if (err < 0) + panic("handle_trap - nullifying syscall failed, " + "errno = %d\n", errno); err = ptrace(PTRACE_SYSCALL, pid, 0, 0); - if(err < 0) - panic("handle_trap - continuing to end of syscall failed, " - "errno = %d\n", errno); + if (err < 0) + panic("handle_trap - continuing to end of syscall " + "failed, errno = %d\n", errno); CATCH_EINTR(err = waitpid(pid, &status, WUNTRACED)); - if((err < 0) || !WIFSTOPPED(status) || - (WSTOPSIG(status) != SIGTRAP + 0x80)){ + if ((err < 0) || !WIFSTOPPED(status) || + (WSTOPSIG(status) != SIGTRAP + 0x80)) { err = ptrace_dump_regs(pid); - if(err) - printk("Failed to get registers from process, " - "errno = %d\n", -err); + if (err) + printk(UM_KERN_ERR "Failed to get registers " + "from process, errno = %d\n", -err); panic("handle_trap - failed to wait at end of syscall, " "errno = %d, status = %d\n", errno, status); } @@ -184,38 +179,39 @@ static int userspace_tramp(void *stack) init_new_thread_signals(); err = set_interval(1); - if(err) + if (err) panic("userspace_tramp - setting timer failed, errno = %d\n", err); - if(!proc_mm){ - /* This has a pte, but it can't be mapped in with the usual + if (!proc_mm) { + /* + * This has a pte, but it can't be mapped in with the usual * tlb_flush mechanism because this is part of that mechanism */ int fd; - __u64 offset; + unsigned long long offset; fd = phys_mapping(to_phys(&__syscall_stub_start), &offset); addr = mmap64((void *) UML_CONFIG_STUB_CODE, UM_KERN_PAGE_SIZE, PROT_EXEC, MAP_FIXED | MAP_PRIVATE, fd, offset); - if(addr == MAP_FAILED){ - printk("mapping mmap stub failed, errno = %d\n", - errno); + if (addr == MAP_FAILED) { + printk(UM_KERN_ERR "mapping mmap stub failed, " + "errno = %d\n", errno); exit(1); } - if(stack != NULL){ + if (stack != NULL) { fd = phys_mapping(to_phys(stack), &offset); addr = mmap((void *) UML_CONFIG_STUB_DATA, UM_KERN_PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_FIXED | MAP_SHARED, fd, offset); - if(addr == MAP_FAILED){ - printk("mapping segfault stack failed, " - "errno = %d\n", errno); + if (addr == MAP_FAILED) { + printk(UM_KERN_ERR "mapping segfault stack " + "failed, errno = %d\n", errno); exit(1); } } } - if(!ptrace_faultinfo && (stack != NULL)){ + if (!ptrace_faultinfo && (stack != NULL)) { struct sigaction sa; unsigned long v = UML_CONFIG_STUB_CODE + @@ -232,13 +228,13 @@ static int userspace_tramp(void *stack) sa.sa_flags = SA_ONSTACK; sa.sa_handler = (void *) v; sa.sa_restorer = NULL; - if(sigaction(SIGSEGV, &sa, NULL) < 0) + if (sigaction(SIGSEGV, &sa, NULL) < 0) panic("userspace_tramp - setting SIGSEGV handler " "failed - errno = %d\n", errno); } os_stop_process(os_getpid()); - return(0); + return 0; } /* Each element set once, and only accessed by a single processor anyway */ @@ -255,35 +251,38 @@ int start_userspace(unsigned long stub_stack) stack = mmap(NULL, UM_KERN_PAGE_SIZE, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); - if(stack == MAP_FAILED) + if (stack == MAP_FAILED) panic("start_userspace : mmap failed, errno = %d", errno); sp = (unsigned long) stack + UM_KERN_PAGE_SIZE - sizeof(void *); flags = CLONE_FILES | SIGCHLD; - if(proc_mm) flags |= CLONE_VM; + if (proc_mm) + flags |= CLONE_VM; + pid = clone(userspace_tramp, (void *) sp, flags, (void *) stub_stack); - if(pid < 0) + if (pid < 0) panic("start_userspace : clone failed, errno = %d", errno); do { CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED)); - if(n < 0) + if (n < 0) panic("start_userspace : wait failed, errno = %d", errno); - } while(WIFSTOPPED(status) && (WSTOPSIG(status) == SIGVTALRM)); + } while (WIFSTOPPED(status) && (WSTOPSIG(status) == SIGVTALRM)); - if(!WIFSTOPPED(status) || (WSTOPSIG(status) != SIGSTOP)) + if (!WIFSTOPPED(status) || (WSTOPSIG(status) != SIGSTOP)) panic("start_userspace : expected SIGSTOP, got status = %d", status); - if (ptrace(PTRACE_OLDSETOPTIONS, pid, NULL, (void *)PTRACE_O_TRACESYSGOOD) < 0) - panic("start_userspace : PTRACE_OLDSETOPTIONS failed, errno=%d\n", - errno); + if (ptrace(PTRACE_OLDSETOPTIONS, pid, NULL, + (void *) PTRACE_O_TRACESYSGOOD) < 0) + panic("start_userspace : PTRACE_OLDSETOPTIONS failed, " + "errno = %d\n", errno); - if(munmap(stack, UM_KERN_PAGE_SIZE) < 0) + if (munmap(stack, UM_KERN_PAGE_SIZE) < 0) panic("start_userspace : munmap failed, errno = %d\n", errno); - return(pid); + return pid; } void userspace(struct uml_pt_regs *regs) @@ -292,7 +291,7 @@ void userspace(struct uml_pt_regs *regs) /* To prevent races if using_sysemu changes under us.*/ int local_using_sysemu; - while(1){ + while (1) { restore_registers(pid, regs); /* Now we set local_using_sysemu to be used for one loop */ @@ -302,13 +301,13 @@ void userspace(struct uml_pt_regs *regs) singlestepping(NULL)); err = ptrace(op, pid, 0, 0); - if(err) + if (err) panic("userspace - could not resume userspace process, " "pid=%d, ptrace operation = %d, errno = %d\n", pid, op, errno); CATCH_EINTR(err = waitpid(pid, &status, WUNTRACED)); - if(err < 0) + if (err < 0) panic("userspace - waitpid failed, errno = %d\n", errno); @@ -316,12 +315,14 @@ void userspace(struct uml_pt_regs *regs) save_registers(pid, regs); UPT_SYSCALL_NR(regs) = -1; /* Assume: It's not a syscall */ - if(WIFSTOPPED(status)){ + if (WIFSTOPPED(status)) { int sig = WSTOPSIG(status); - switch(sig){ + switch(sig) { case SIGSEGV: - if(PTRACE_FULL_FAULTINFO || !ptrace_faultinfo){ - get_skas_faultinfo(pid, ®s->faultinfo); + if (PTRACE_FULL_FAULTINFO || + !ptrace_faultinfo) { + get_skas_faultinfo(pid, + ®s->faultinfo); (*sig_info[SIGSEGV])(SIGSEGV, regs); } else handle_segv(pid, regs); @@ -343,14 +344,14 @@ void userspace(struct uml_pt_regs *regs) unblock_signals(); break; default: - printk("userspace - child stopped with signal " - "%d\n", sig); + printk(UM_KERN_ERR "userspace - child stopped " + "with signal %d\n", sig); } pid = userspace_pid[0]; interrupt_end(); /* Avoid -ERESTARTSYS handling in host */ - if(PT_SYSCALL_NR_OFFSET != PT_SYSCALL_RET_OFFSET) + if (PT_SYSCALL_NR_OFFSET != PT_SYSCALL_RET_OFFSET) PT_SYSCALL_NR(regs->regs) = -1; } } @@ -384,7 +385,8 @@ int copy_context_skas0(unsigned long new_stack, int pid) __u64 new_offset; int new_fd = phys_mapping(to_phys((void *)new_stack), &new_offset); - /* prepare offset and fd of child's stack as argument for parent's + /* + * prepare offset and fd of child's stack as argument for parent's * and child's mmap2 calls */ *data = ((struct stub_data) { .offset = MMAP_OFFSET(new_offset), @@ -393,28 +395,30 @@ int copy_context_skas0(unsigned long new_stack, int pid) { { 0, 1000000 / hz() }, { 0, 1000000 / hz() }})}); err = ptrace_setregs(pid, thread_regs); - if(err < 0) + if (err < 0) panic("copy_context_skas0 : PTRACE_SETREGS failed, " "pid = %d, errno = %d\n", pid, -err); /* set a well known return code for detection of child write failure */ child_data->err = 12345678; - /* Wait, until parent has finished its work: read child's pid from + /* + * Wait, until parent has finished its work: read child's pid from * parent's stack, and check, if bad result. */ err = ptrace(PTRACE_CONT, pid, 0, 0); - if(err) + if (err) panic("Failed to continue new process, pid = %d, " "errno = %d\n", pid, errno); wait_stub_done(pid); pid = data->err; - if(pid < 0) + if (pid < 0) panic("copy_context_skas0 - stub-parent reports error %d\n", -pid); - /* Wait, until child has finished too: read child's result from + /* + * Wait, until child has finished too: read child's result from * child's stack and check it. */ wait_stub_done(pid); @@ -455,15 +459,16 @@ void map_stub_pages(int fd, unsigned long code, .offset = code_offset } } }); CATCH_EINTR(n = write(fd, &mmop, sizeof(mmop))); - if(n != sizeof(mmop)){ + if (n != sizeof(mmop)) { n = errno; - printk("mmap args - addr = 0x%lx, fd = %d, offset = %llx\n", - code, code_fd, (unsigned long long) code_offset); + printk(UM_KERN_ERR "mmap args - addr = 0x%lx, fd = %d, " + "offset = %llx\n", code, code_fd, + (unsigned long long) code_offset); panic("map_stub_pages : /proc/mm map for code failed, " "err = %d\n", n); } - if ( stack ) { + if (stack) { __u64 map_offset; int map_fd = phys_mapping(to_phys((void *)stack), &map_offset); mmop = ((struct proc_mm_op) @@ -478,7 +483,7 @@ void map_stub_pages(int fd, unsigned long code, .offset = map_offset } } }); CATCH_EINTR(n = write(fd, &mmop, sizeof(mmop))); - if(n != sizeof(mmop)) + if (n != sizeof(mmop)) panic("map_stub_pages : /proc/mm map for data failed, " "err = %d\n", errno); } @@ -498,7 +503,7 @@ void new_thread(void *stack, jmp_buf *buf, void (*handler)(void)) void switch_threads(jmp_buf *me, jmp_buf *you) { - if(UML_SETJMP(me) == 0) + if (UML_SETJMP(me) == 0) UML_LONGJMP(you, 1); } @@ -526,7 +531,7 @@ int start_idle_thread(void *stack, jmp_buf *switch_buf) * after returning to the jumper. */ n = setjmp(initial_jmpbuf); - switch(n){ + switch(n) { case INIT_JMP_NEW_THREAD: (*switch_buf)[0].JB_IP = (unsigned long) new_thread_handler; (*switch_buf)[0].JB_SP = (unsigned long) stack + @@ -538,10 +543,10 @@ int start_idle_thread(void *stack, jmp_buf *switch_buf) break; case INIT_JMP_HALT: kmalloc_ok = 0; - return(0); + return 0; case INIT_JMP_REBOOT: kmalloc_ok = 0; - return(1); + return 1; default: panic("Bad sigsetjmp return in start_idle_thread - %d\n", n); } @@ -557,7 +562,7 @@ void initial_thread_cb_skas(void (*proc)(void *), void *arg) cb_back = &here; block_signals(); - if(UML_SETJMP(&here) == 0) + if (UML_SETJMP(&here) == 0) UML_LONGJMP(&initial_jmpbuf, INIT_JMP_CALLBACK); unblock_signals(); @@ -583,10 +588,10 @@ void __switch_mm(struct mm_id *mm_idp) int err; /* FIXME: need cpu pid in __switch_mm */ - if(proc_mm){ + if (proc_mm) { err = ptrace(PTRACE_SWITCH_MM, userspace_pid[0], 0, mm_idp->u.mm_fd); - if(err) + if (err) panic("__switch_mm - PTRACE_SWITCH_MM failed, " "errno = %d\n", errno); } diff --git a/arch/um/os-Linux/skas/trap.c b/arch/um/os-Linux/skas/trap.c index d43e470227de..e53face44200 100644 --- a/arch/um/os-Linux/skas/trap.c +++ b/arch/um/os-Linux/skas/trap.c @@ -1,19 +1,23 @@ /* - * Copyright (C) 2002 - 2003 Jeff Dike (jdike@addtoit.com) + * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include <signal.h> -#include <errno.h> +#if 0 #include "kern_util.h" -#include "as-layout.h" -#include "task.h" -#include "sigcontext.h" #include "skas.h" #include "ptrace_user.h" -#include "sysdep/ptrace.h" #include "sysdep/ptrace_user.h" +#endif + +#include <errno.h> +#include <signal.h> +#include "sysdep/ptrace.h" +#include "kern_constants.h" +#include "as-layout.h" #include "os.h" +#include "sigcontext.h" +#include "task.h" static struct uml_pt_regs ksig_regs[UM_NR_CPUS]; @@ -24,14 +28,16 @@ void sig_handler_common_skas(int sig, void *sc_ptr) void (*handler)(int, struct uml_pt_regs *); int save_user, save_errno = errno; - /* This is done because to allow SIGSEGV to be delivered inside a SEGV + /* + * This is done because to allow SIGSEGV to be delivered inside a SEGV * handler. This can happen in copy_user, and if SEGV is disabled, * the process will die. * XXX Figure out why this is better than SA_NODEFER */ - if(sig == SIGSEGV) { + if (sig == SIGSEGV) { change_sig(SIGSEGV, 1); - /* For segfaults, we want the data from the + /* + * For segfaults, we want the data from the * sigcontext. In this case, we don't want to mangle * the process registers, so use a static set of * registers. For other signals, the process @@ -44,11 +50,9 @@ void sig_handler_common_skas(int sig, void *sc_ptr) save_user = r->is_user; r->is_user = 0; - if ( sig == SIGFPE || sig == SIGSEGV || - sig == SIGBUS || sig == SIGILL || - sig == SIGTRAP ) { + if ((sig == SIGFPE) || (sig == SIGSEGV) || (sig == SIGBUS) || + (sig == SIGILL) || (sig == SIGTRAP)) GET_FAULTINFO_FROM_SC(r->faultinfo, sc); - } change_sig(SIGUSR1, 1); diff --git a/arch/um/os-Linux/start_up.c b/arch/um/os-Linux/start_up.c index abfc094c3c49..f22715868929 100644 --- a/arch/um/os-Linux/start_up.c +++ b/arch/um/os-Linux/start_up.c @@ -1,41 +1,29 @@ /* - * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include <pty.h> #include <stdio.h> -#include <stddef.h> -#include <stdarg.h> #include <stdlib.h> -#include <string.h> +#include <stdarg.h> #include <unistd.h> -#include <signal.h> -#include <sched.h> -#include <fcntl.h> #include <errno.h> -#include <sys/time.h> -#include <sys/wait.h> +#include <fcntl.h> +#include <sched.h> +#include <signal.h> +#include <string.h> #include <sys/mman.h> -#include <sys/resource.h> +#include <sys/ptrace.h> +#include <sys/stat.h> +#include <sys/wait.h> #include <asm/unistd.h> -#include <sys/types.h> -#include "kern_util.h" -#include "user.h" -#include "signal_kern.h" -#include "sysdep/ptrace.h" -#include "sysdep/sigcontext.h" -#include "irq_user.h" -#include "ptrace_user.h" -#include "mem_user.h" #include "init.h" -#include "os.h" -#include "uml-config.h" -#include "tempfile.h" #include "kern_constants.h" -#include "skas.h" -#include "skas_ptrace.h" +#include "os.h" +#include "mem_user.h" +#include "ptrace_user.h" #include "registers.h" +#include "skas_ptrace.h" static int ptrace_child(void *arg) { @@ -44,26 +32,33 @@ static int ptrace_child(void *arg) int sc_result; change_sig(SIGWINCH, 0); - if(ptrace(PTRACE_TRACEME, 0, 0, 0) < 0){ + if (ptrace(PTRACE_TRACEME, 0, 0, 0) < 0) { perror("ptrace"); os_kill_process(pid, 0); } kill(pid, SIGSTOP); - /*This syscall will be intercepted by the parent. Don't call more than - * once, please.*/ + /* + * This syscall will be intercepted by the parent. Don't call more than + * once, please. + */ sc_result = os_getpid(); if (sc_result == pid) - ret = 1; /*Nothing modified by the parent, we are running - normally.*/ + /* Nothing modified by the parent, we are running normally. */ + ret = 1; else if (sc_result == ppid) - ret = 0; /*Expected in check_ptrace and check_sysemu when they - succeed in modifying the stack frame*/ + /* + * Expected in check_ptrace and check_sysemu when they succeed + * in modifying the stack frame + */ + ret = 0; else - ret = 2; /*Serious trouble! This could be caused by a bug in - host 2.6 SKAS3/2.6 patch before release -V6, together - with a bug in the UML code itself.*/ + /* Serious trouble! This could be caused by a bug in host 2.6 + * SKAS3/2.6 patch before release -V6, together with a bug in + * the UML code itself. + */ + ret = 2; _exit(ret); } @@ -104,16 +99,18 @@ static int start_ptraced_child(void **stack_out) stack = mmap(NULL, UM_KERN_PAGE_SIZE, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); - if(stack == MAP_FAILED) + if (stack == MAP_FAILED) fatal_perror("check_ptrace : mmap failed"); + sp = (unsigned long) stack + UM_KERN_PAGE_SIZE - sizeof(void *); pid = clone(ptrace_child, (void *) sp, SIGCHLD, NULL); - if(pid < 0) + if (pid < 0) fatal_perror("start_ptraced_child : clone failed"); + CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED)); - if(n < 0) + if (n < 0) fatal_perror("check_ptrace : clone failed"); - if(!WIFSTOPPED(status) || (WSTOPSIG(status) != SIGSTOP)) + if (!WIFSTOPPED(status) || (WSTOPSIG(status) != SIGSTOP)) fatal("check_ptrace : expected SIGSTOP, got status = %d", status); @@ -132,10 +129,10 @@ static int stop_ptraced_child(int pid, void *stack, int exitcode, { int status, n, ret = 0; - if(ptrace(PTRACE_CONT, pid, 0, 0) < 0) + if (ptrace(PTRACE_CONT, pid, 0, 0) < 0) fatal_perror("stop_ptraced_child : ptrace failed"); CATCH_EINTR(n = waitpid(pid, &status, 0)); - if(!WIFEXITED(status) || (WEXITSTATUS(status) != exitcode)) { + if (!WIFEXITED(status) || (WEXITSTATUS(status) != exitcode)) { int exit_with = WEXITSTATUS(status); if (exit_with == 2) non_fatal("check_ptrace : child exited with status 2. " @@ -148,7 +145,7 @@ static int stop_ptraced_child(int pid, void *stack, int exitcode, ret = -1; } - if(munmap(stack, UM_KERN_PAGE_SIZE) < 0) + if (munmap(stack, UM_KERN_PAGE_SIZE) < 0) fatal_perror("check_ptrace : munmap failed"); return ret; } @@ -209,26 +206,26 @@ static void __init check_sysemu(void) sysemu_supported = 0; pid = start_ptraced_child(&stack); - if(ptrace(PTRACE_SYSEMU, pid, 0, 0) < 0) + if (ptrace(PTRACE_SYSEMU, pid, 0, 0) < 0) goto fail; CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED)); if (n < 0) fatal_perror("check_sysemu : wait failed"); - if(!WIFSTOPPED(status) || (WSTOPSIG(status) != SIGTRAP)) + if (!WIFSTOPPED(status) || (WSTOPSIG(status) != SIGTRAP)) fatal("check_sysemu : expected SIGTRAP, got status = %d", status); - if(ptrace(PTRACE_GETREGS, pid, 0, regs) < 0) + if (ptrace(PTRACE_GETREGS, pid, 0, regs) < 0) fatal_perror("check_sysemu : PTRACE_GETREGS failed"); - if(PT_SYSCALL_NR(regs) != __NR_getpid){ + if (PT_SYSCALL_NR(regs) != __NR_getpid) { non_fatal("check_sysemu got system call number %d, " "expected %d...", PT_SYSCALL_NR(regs), __NR_getpid); goto fail; } n = ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_RET_OFFSET, os_getpid()); - if(n < 0){ + if (n < 0) { non_fatal("check_sysemu : failed to modify system call " "return"); goto fail; @@ -244,30 +241,31 @@ static void __init check_sysemu(void) non_fatal("Checking advanced syscall emulation patch for ptrace..."); pid = start_ptraced_child(&stack); - if((ptrace(PTRACE_OLDSETOPTIONS, pid, 0, + if ((ptrace(PTRACE_OLDSETOPTIONS, pid, 0, (void *) PTRACE_O_TRACESYSGOOD) < 0)) fatal_perror("check_ptrace: PTRACE_OLDSETOPTIONS failed"); - while(1){ + while (1) { count++; - if(ptrace(PTRACE_SYSEMU_SINGLESTEP, pid, 0, 0) < 0) + if (ptrace(PTRACE_SYSEMU_SINGLESTEP, pid, 0, 0) < 0) goto fail; CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED)); - if(n < 0) + if (n < 0) fatal_perror("check_ptrace : wait failed"); - if(WIFSTOPPED(status) && (WSTOPSIG(status) == (SIGTRAP|0x80))){ + if (WIFSTOPPED(status) && + (WSTOPSIG(status) == (SIGTRAP|0x80))) { if (!count) fatal("check_ptrace : SYSEMU_SINGLESTEP " "doesn't singlestep"); n = ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_RET_OFFSET, os_getpid()); - if(n < 0) + if (n < 0) fatal_perror("check_sysemu : failed to modify " "system call return"); break; } - else if(WIFSTOPPED(status) && (WSTOPSIG(status) == SIGTRAP)) + else if (WIFSTOPPED(status) && (WSTOPSIG(status) == SIGTRAP)) count++; else fatal("check_ptrace : expected SIGTRAP or " @@ -279,7 +277,7 @@ static void __init check_sysemu(void) sysemu_supported = 2; non_fatal("OK\n"); - if ( !force_sysemu_disabled ) + if (!force_sysemu_disabled) set_using_sysemu(sysemu_supported); return; @@ -297,29 +295,29 @@ static void __init check_ptrace(void) non_fatal("Checking that ptrace can change system call numbers..."); pid = start_ptraced_child(&stack); - if((ptrace(PTRACE_OLDSETOPTIONS, pid, 0, + if ((ptrace(PTRACE_OLDSETOPTIONS, pid, 0, (void *) PTRACE_O_TRACESYSGOOD) < 0)) fatal_perror("check_ptrace: PTRACE_OLDSETOPTIONS failed"); - while(1){ - if(ptrace(PTRACE_SYSCALL, pid, 0, 0) < 0) + while (1) { + if (ptrace(PTRACE_SYSCALL, pid, 0, 0) < 0) fatal_perror("check_ptrace : ptrace failed"); CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED)); - if(n < 0) + if (n < 0) fatal_perror("check_ptrace : wait failed"); - if(!WIFSTOPPED(status) || + if (!WIFSTOPPED(status) || (WSTOPSIG(status) != (SIGTRAP | 0x80))) fatal("check_ptrace : expected (SIGTRAP|0x80), " "got status = %d", status); syscall = ptrace(PTRACE_PEEKUSR, pid, PT_SYSCALL_NR_OFFSET, 0); - if(syscall == __NR_getpid){ + if (syscall == __NR_getpid) { n = ptrace(PTRACE_POKEUSR, pid, PT_SYSCALL_NR_OFFSET, __NR_getppid); - if(n < 0) + if (n < 0) fatal_perror("check_ptrace : failed to modify " "system call"); break; @@ -337,18 +335,18 @@ static void __init check_coredump_limit(void) struct rlimit lim; int err = getrlimit(RLIMIT_CORE, &lim); - if(err){ + if (err) { perror("Getting core dump limit"); return; } printf("Core dump limits :\n\tsoft - "); - if(lim.rlim_cur == RLIM_INFINITY) + if (lim.rlim_cur == RLIM_INFINITY) printf("NONE\n"); else printf("%lu\n", lim.rlim_cur); printf("\thard - "); - if(lim.rlim_max == RLIM_INFINITY) + if (lim.rlim_max == RLIM_INFINITY) printf("NONE\n"); else printf("%lu\n", lim.rlim_max); } @@ -414,7 +412,7 @@ static inline void check_skas3_ptrace_faultinfo(void) n = ptrace(PTRACE_FAULTINFO, pid, 0, &fi); if (n < 0) { ptrace_faultinfo = 0; - if(errno == EIO) + if (errno == EIO) non_fatal("not found\n"); else perror("not found"); @@ -446,7 +444,7 @@ static inline void check_skas3_ptrace_ldt(void) n = ptrace(PTRACE_LDT, pid, 0, (unsigned long) &ldt_op); if (n < 0) { - if(errno == EIO) + if (errno == EIO) non_fatal("not found\n"); else { perror("not found"); @@ -454,7 +452,7 @@ static inline void check_skas3_ptrace_ldt(void) ptrace_ldt = 0; } else { - if(ptrace_ldt) + if (ptrace_ldt) non_fatal("found\n"); else non_fatal("found, but use is disabled\n"); @@ -477,12 +475,9 @@ static inline void check_skas3_proc_mm(void) proc_mm = 0; perror("not found"); } - else { - if (!proc_mm) - non_fatal("found but disabled on command line\n"); - else - non_fatal("found\n"); - } + else if (!proc_mm) + non_fatal("found but disabled on command line\n"); + else non_fatal("found\n"); } int can_do_skas(void) @@ -493,7 +488,7 @@ int can_do_skas(void) check_skas3_ptrace_faultinfo(); check_skas3_ptrace_ldt(); - if(!proc_mm || !ptrace_faultinfo || !ptrace_ldt) + if (!proc_mm || !ptrace_faultinfo || !ptrace_ldt) skas_needs_stub = 1; return 1; @@ -508,25 +503,25 @@ int __init parse_iomem(char *str, int *add) driver = str; file = strchr(str,','); - if(file == NULL){ + if (file == NULL) { printf("parse_iomem : failed to parse iomem\n"); goto out; } *file = '\0'; file++; fd = open(file, O_RDWR, 0); - if(fd < 0){ + if (fd < 0) { os_print_error(fd, "parse_iomem - Couldn't open io file"); goto out; } - if(fstat64(fd, &buf) < 0){ + if (fstat64(fd, &buf) < 0) { perror("parse_iomem - cannot stat_fd file"); goto out_close; } new = malloc(sizeof(*new)); - if(new == NULL){ + if (new == NULL) { perror("Couldn't allocate iomem_region struct"); goto out_close; } diff --git a/arch/um/os-Linux/trap.c b/arch/um/os-Linux/trap.c index e87fb5362f44..be8e029f58b4 100644 --- a/arch/um/os-Linux/trap.c +++ b/arch/um/os-Linux/trap.c @@ -1,13 +1,11 @@ /* - * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include <stdlib.h> #include <signal.h> -#include "kern_util.h" #include "os.h" -#include "longjmp.h" +#include "sysdep/ptrace.h" /* Initialized from linux_main() */ void (*sig_info[NSIG])(int, struct uml_pt_regs *); diff --git a/arch/um/os-Linux/umid.c b/arch/um/os-Linux/umid.c index e36541e5ec00..106fa8641553 100644 --- a/arch/um/os-Linux/umid.c +++ b/arch/um/os-Linux/umid.c @@ -1,14 +1,19 @@ +/* + * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) + * Licensed under the GPL + */ + #include <stdio.h> -#include <unistd.h> #include <stdlib.h> -#include <string.h> +#include <dirent.h> #include <errno.h> +#include <fcntl.h> #include <signal.h> -#include <dirent.h> -#include <sys/fcntl.h> +#include <string.h> +#include <unistd.h> #include <sys/stat.h> -#include <sys/param.h> #include "init.h" +#include "kern_constants.h" #include "os.h" #include "user.h" @@ -27,13 +32,13 @@ static int __init make_uml_dir(void) char dir[512] = { '\0' }; int len, err; - if(*uml_dir == '~'){ + if (*uml_dir == '~') { char *home = getenv("HOME"); err = -ENOENT; - if(home == NULL){ - printk("make_uml_dir : no value in environment for " - "$HOME\n"); + if (home == NULL) { + printk(UM_KERN_ERR "make_uml_dir : no value in " + "environment for $HOME\n"); goto err; } strlcpy(dir, home, sizeof(dir)); @@ -52,7 +57,7 @@ static int __init make_uml_dir(void) } strcpy(uml_dir, dir); - if((mkdir(uml_dir, 0777) < 0) && (errno != EEXIST)){ + if ((mkdir(uml_dir, 0777) < 0) && (errno != EEXIST)) { printf("Failed to mkdir '%s': %s\n", uml_dir, strerror(errno)); err = -errno; goto err_free; @@ -69,8 +74,8 @@ err: /* * Unlinks the files contained in @dir and then removes @dir. * Doesn't handle directory trees, so it's not like rm -rf, but almost such. We - * ignore ENOENT errors for anything (they happen, strangely enough - possibly due - * to races between multiple dying UML threads). + * ignore ENOENT errors for anything (they happen, strangely enough - possibly + * due to races between multiple dying UML threads). */ static int remove_files_and_dir(char *dir) { @@ -115,7 +120,8 @@ out: return ret; } -/* This says that there isn't already a user of the specified directory even if +/* + * This says that there isn't already a user of the specified directory even if * there are errors during the checking. This is because if these errors * happen, the directory is unusable by the pre-existing UML, so we might as * well take it over. This could happen either by @@ -133,44 +139,45 @@ static inline int is_umdir_used(char *dir) int dead, fd, p, n, err; n = snprintf(file, sizeof(file), "%s/pid", dir); - if(n >= sizeof(file)){ - printk("is_umdir_used - pid filename too long\n"); + if (n >= sizeof(file)) { + printk(UM_KERN_ERR "is_umdir_used - pid filename too long\n"); err = -E2BIG; goto out; } dead = 0; fd = open(file, O_RDONLY); - if(fd < 0) { + if (fd < 0) { fd = -errno; - if(fd != -ENOENT){ - printk("is_umdir_used : couldn't open pid file '%s', " - "err = %d\n", file, -fd); + if (fd != -ENOENT) { + printk(UM_KERN_ERR "is_umdir_used : couldn't open pid " + "file '%s', err = %d\n", file, -fd); } goto out; } err = 0; n = read(fd, pid, sizeof(pid)); - if(n < 0){ - printk("is_umdir_used : couldn't read pid file '%s', " - "err = %d\n", file, errno); + if (n < 0) { + printk(UM_KERN_ERR "is_umdir_used : couldn't read pid file " + "'%s', err = %d\n", file, errno); goto out_close; - } else if(n == 0){ - printk("is_umdir_used : couldn't read pid file '%s', " - "0-byte read\n", file); + } else if (n == 0) { + printk(UM_KERN_ERR "is_umdir_used : couldn't read pid file " + "'%s', 0-byte read\n", file); goto out_close; } p = strtoul(pid, &end, 0); - if(end == pid){ - printk("is_umdir_used : couldn't parse pid file '%s', " - "errno = %d\n", file, errno); + if (end == pid) { + printk(UM_KERN_ERR "is_umdir_used : couldn't parse pid file " + "'%s', errno = %d\n", file, errno); goto out_close; } - if((kill(p, 0) == 0) || (errno != ESRCH)){ - printk("umid \"%s\" is already in use by pid %d\n", umid, p); + if ((kill(p, 0) == 0) || (errno != ESRCH)) { + printk(UM_KERN_ERR "umid \"%s\" is already in use by pid %d\n", + umid, p); return 1; } @@ -194,8 +201,8 @@ static int umdir_take_if_dead(char *dir) ret = remove_files_and_dir(dir); if (ret) { - printk("is_umdir_used - remove_files_and_dir failed with " - "err = %d\n", ret); + printk(UM_KERN_ERR "is_umdir_used - remove_files_and_dir " + "failed with err = %d\n", ret); } return ret; } @@ -206,27 +213,28 @@ static void __init create_pid_file(void) char pid[sizeof("nnnnn\0")]; int fd, n; - if(umid_file_name("pid", file, sizeof(file))) + if (umid_file_name("pid", file, sizeof(file))) return; fd = open(file, O_RDWR | O_CREAT | O_EXCL, 0644); - if(fd < 0){ - printk("Open of machine pid file \"%s\" failed: %s\n", - file, strerror(errno)); + if (fd < 0) { + printk(UM_KERN_ERR "Open of machine pid file \"%s\" failed: " + "%s\n", file, strerror(errno)); return; } snprintf(pid, sizeof(pid), "%d\n", getpid()); n = write(fd, pid, strlen(pid)); - if(n != strlen(pid)) - printk("Write of pid file failed - err = %d\n", errno); + if (n != strlen(pid)) + printk(UM_KERN_ERR "Write of pid file failed - err = %d\n", + errno); close(fd); } int __init set_umid(char *name) { - if(strlen(name) > UMID_LEN - 1) + if (strlen(name) > UMID_LEN - 1) return -E2BIG; strlcpy(umid, name, sizeof(umid)); @@ -242,18 +250,18 @@ int __init make_umid(void) int fd, err; char tmp[256]; - if(umid_setup) + if (umid_setup) return 0; make_uml_dir(); - if(*umid == '\0'){ + if (*umid == '\0') { strlcpy(tmp, uml_dir, sizeof(tmp)); strlcat(tmp, "XXXXXX", sizeof(tmp)); fd = mkstemp(tmp); - if(fd < 0){ - printk("make_umid - mkstemp(%s) failed: %s\n", - tmp, strerror(errno)); + if (fd < 0) { + printk(UM_KERN_ERR "make_umid - mkstemp(%s) failed: " + "%s\n", tmp, strerror(errno)); err = -errno; goto err; } @@ -262,11 +270,12 @@ int __init make_umid(void) set_umid(&tmp[strlen(uml_dir)]); - /* There's a nice tiny little race between this unlink and + /* + * There's a nice tiny little race between this unlink and * the mkdir below. It'd be nice if there were a mkstemp * for directories. */ - if(unlink(tmp)){ + if (unlink(tmp)) { err = -errno; goto err; } @@ -274,9 +283,9 @@ int __init make_umid(void) snprintf(tmp, sizeof(tmp), "%s%s", uml_dir, umid); err = mkdir(tmp, 0777); - if(err < 0){ + if (err < 0) { err = -errno; - if(err != -EEXIST) + if (err != -EEXIST) goto err; if (umdir_take_if_dead(tmp) < 0) @@ -284,9 +293,10 @@ int __init make_umid(void) err = mkdir(tmp, 0777); } - if(err){ + if (err) { err = -errno; - printk("Failed to create '%s' - err = %d\n", umid, -errno); + printk(UM_KERN_ERR "Failed to create '%s' - err = %d\n", umid, + errno); goto err; } @@ -301,14 +311,15 @@ int __init make_umid(void) static int __init make_umid_init(void) { - if(!make_umid()) + if (!make_umid()) return 0; - /* If initializing with the given umid failed, then try again with + /* + * If initializing with the given umid failed, then try again with * a random one. */ - printk("Failed to initialize umid \"%s\", trying with a random umid\n", - umid); + printk(UM_KERN_ERR "Failed to initialize umid \"%s\", trying with a " + "random umid\n", umid); *umid = '\0'; make_umid(); @@ -322,12 +333,12 @@ int __init umid_file_name(char *name, char *buf, int len) int n, err; err = make_umid(); - if(err) + if (err) return err; n = snprintf(buf, len, "%s%s/%s", uml_dir, umid, name); - if(n >= len){ - printk("umid_file_name : buffer too short\n"); + if (n >= len) { + printk(UM_KERN_ERR "umid_file_name : buffer too short\n"); return -E2BIG; } @@ -341,21 +352,22 @@ char *get_umid(void) static int __init set_uml_dir(char *name, int *add) { - if(*name == '\0'){ + if (*name == '\0') { printf("uml_dir can't be an empty string\n"); return 0; } - if(name[strlen(name) - 1] == '/'){ + if (name[strlen(name) - 1] == '/') { uml_dir = name; return 0; } uml_dir = malloc(strlen(name) + 2); - if(uml_dir == NULL){ + if (uml_dir == NULL) { printf("Failed to malloc uml_dir - error = %d\n", errno); - /* Return 0 here because do_initcalls doesn't look at + /* + * Return 0 here because do_initcalls doesn't look at * the return value. */ return 0; @@ -376,7 +388,7 @@ static void remove_umid_dir(void) sprintf(dir, "%s%s", uml_dir, umid); err = remove_files_and_dir(dir); - if(err) + if (err) printf("remove_umid_dir - remove_files_and_dir failed with " "err = %d\n", err); } diff --git a/arch/um/sys-i386/bugs.c b/arch/um/sys-i386/bugs.c index 25c1165d8093..806895d73bcc 100644 --- a/arch/um/sys-i386/bugs.c +++ b/arch/um/sys-i386/bugs.c @@ -1,18 +1,15 @@ /* - * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include <unistd.h> #include <errno.h> +#include <signal.h> #include <string.h> -#include <sys/signal.h> -#include <asm/ldt.h> -#include "kern_util.h" -#include "user.h" -#include "sysdep/ptrace.h" -#include "task.h" +#include "kern_constants.h" #include "os.h" +#include "task.h" +#include "user.h" #define MAXTOKEN 64 @@ -30,18 +27,20 @@ static char token(int fd, char *buf, int len, char stop) do { n = os_read_file(fd, ptr, sizeof(*ptr)); c = *ptr++; - if(n != sizeof(*ptr)){ - if(n == 0) + if (n != sizeof(*ptr)) { + if (n == 0) return 0; - printk("Reading /proc/cpuinfo failed, err = %d\n", -n); - if(n < 0) + printk(UM_KERN_ERR "Reading /proc/cpuinfo failed, " + "err = %d\n", -n); + if (n < 0) return n; else return -EIO; } - } while((c != '\n') && (c != stop) && (ptr < end)); + } while ((c != '\n') && (c != stop) && (ptr < end)); - if(ptr == end){ - printk("Failed to find '%c' in /proc/cpuinfo\n", stop); + if (ptr == end) { + printk(UM_KERN_ERR "Failed to find '%c' in /proc/cpuinfo\n", + stop); return -1; } *(ptr - 1) = '\0'; @@ -54,26 +53,27 @@ static int find_cpuinfo_line(int fd, char *key, char *scratch, int len) char c; scratch[len - 1] = '\0'; - while(1){ + while (1) { c = token(fd, scratch, len - 1, ':'); - if(c <= 0) + if (c <= 0) return 0; - else if(c != ':'){ - printk("Failed to find ':' in /proc/cpuinfo\n"); + else if (c != ':') { + printk(UM_KERN_ERR "Failed to find ':' in " + "/proc/cpuinfo\n"); return 0; } - if(!strncmp(scratch, key, strlen(key))) + if (!strncmp(scratch, key, strlen(key))) return 1; do { n = os_read_file(fd, &c, sizeof(c)); - if(n != sizeof(c)){ - printk("Failed to find newline in " + if (n != sizeof(c)) { + printk(UM_KERN_ERR "Failed to find newline in " "/proc/cpuinfo, err = %d\n", -n); return 0; } - } while(c != '\n'); + } while (c != '\n'); } return 0; } @@ -83,46 +83,50 @@ static int check_cpu_flag(char *feature, int *have_it) char buf[MAXTOKEN], c; int fd, len = ARRAY_SIZE(buf); - printk("Checking for host processor %s support...", feature); + printk(UM_KERN_INFO "Checking for host processor %s support...", + feature); fd = os_open_file("/proc/cpuinfo", of_read(OPENFLAGS()), 0); - if(fd < 0){ - printk("Couldn't open /proc/cpuinfo, err = %d\n", -fd); + if (fd < 0) { + printk(UM_KERN_ERR "Couldn't open /proc/cpuinfo, err = %d\n", + -fd); return 0; } *have_it = 0; - if(!find_cpuinfo_line(fd, "flags", buf, ARRAY_SIZE(buf))) + if (!find_cpuinfo_line(fd, "flags", buf, ARRAY_SIZE(buf))) goto out; c = token(fd, buf, len - 1, ' '); - if(c < 0) + if (c < 0) goto out; - else if(c != ' '){ - printk("Failed to find ' ' in /proc/cpuinfo\n"); + else if (c != ' ') { + printk(UM_KERN_ERR "Failed to find ' ' in /proc/cpuinfo\n"); goto out; } - while(1){ + while (1) { c = token(fd, buf, len - 1, ' '); - if(c < 0) + if (c < 0) goto out; - else if(c == '\n') break; + else if (c == '\n') + break; - if(!strcmp(buf, feature)){ + if (!strcmp(buf, feature)) { *have_it = 1; goto out; } } out: - if(*have_it == 0) + if (*have_it == 0) printk("No\n"); - else if(*have_it == 1) + else if (*have_it == 1) printk("Yes\n"); os_close_file(fd); return 1; } -#if 0 /* This doesn't work in tt mode, plus it's causing compilation problems +#if 0 /* + * This doesn't work in tt mode, plus it's causing compilation problems * for some people. */ static void disable_lcall(void) @@ -135,8 +139,9 @@ static void disable_lcall(void) ldt.base_addr = 0; ldt.limit = 0; err = modify_ldt(1, &ldt, sizeof(ldt)); - if(err) - printk("Failed to disable lcall7 - errno = %d\n", errno); + if (err) + printk(UM_KERN_ERR "Failed to disable lcall7 - errno = %d\n", + errno); } #endif @@ -151,14 +156,14 @@ void arch_check_bugs(void) { int have_it; - if(os_access("/proc/cpuinfo", OS_ACC_R_OK) < 0){ - printk("/proc/cpuinfo not available - skipping CPU capability " - "checks\n"); + if (os_access("/proc/cpuinfo", OS_ACC_R_OK) < 0) { + printk(UM_KERN_ERR "/proc/cpuinfo not available - skipping CPU " + "capability checks\n"); return; } - if(check_cpu_flag("cmov", &have_it)) + if (check_cpu_flag("cmov", &have_it)) host_has_cmov = have_it; - if(check_cpu_flag("xmm", &have_it)) + if (check_cpu_flag("xmm", &have_it)) host_has_xmm = have_it; } @@ -166,25 +171,26 @@ int arch_handle_signal(int sig, struct uml_pt_regs *regs) { unsigned char tmp[2]; - /* This is testing for a cmov (0x0f 0x4x) instruction causing a + /* + * This is testing for a cmov (0x0f 0x4x) instruction causing a * SIGILL in init. */ - if((sig != SIGILL) || (TASK_PID(get_current()) != 1)) + if ((sig != SIGILL) || (TASK_PID(get_current()) != 1)) return 0; if (copy_from_user_proc(tmp, (void *) UPT_IP(regs), 2)) panic("SIGILL in init, could not read instructions!\n"); - if((tmp[0] != 0x0f) || ((tmp[1] & 0xf0) != 0x40)) + if ((tmp[0] != 0x0f) || ((tmp[1] & 0xf0) != 0x40)) return 0; - if(host_has_cmov == 0) + if (host_has_cmov == 0) panic("SIGILL caused by cmov, which this processor doesn't " "implement, boot a filesystem compiled for older " "processors"); - else if(host_has_cmov == 1) + else if (host_has_cmov == 1) panic("SIGILL caused by cmov, which this processor claims to " "implement"); - else if(host_has_cmov == -1) + else if (host_has_cmov == -1) panic("SIGILL caused by cmov, couldn't tell if this processor " "implements it, boot a filesystem compiled for older " "processors"); diff --git a/arch/um/sys-i386/fault.c b/arch/um/sys-i386/fault.c index cc06a5737df0..d670f68532f4 100644 --- a/arch/um/sys-i386/fault.c +++ b/arch/um/sys-i386/fault.c @@ -1,5 +1,5 @@ /* - * Copyright (C) 2002 - 2004 Jeff Dike (jdike@addtoit.com) + * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ @@ -20,9 +20,9 @@ int arch_fixup(unsigned long address, struct uml_pt_regs *regs) const struct exception_table_entry *fixup; fixup = search_exception_tables(address); - if(fixup != 0){ + if (fixup != 0) { UPT_IP(regs) = fixup->fixup; - return(1); + return 1; } - return(0); + return 0; } diff --git a/arch/um/sys-i386/ldt.c b/arch/um/sys-i386/ldt.c index 906c2a4e7279..0bf7572a80a3 100644 --- a/arch/um/sys-i386/ldt.c +++ b/arch/um/sys-i386/ldt.c @@ -1,34 +1,26 @@ /* - * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com) + * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include "linux/sched.h" -#include "linux/slab.h" -#include "linux/types.h" -#include "linux/errno.h" -#include "linux/spinlock.h" -#include "asm/uaccess.h" -#include "asm/smp.h" -#include "asm/ldt.h" +#include "linux/mm.h" #include "asm/unistd.h" -#include "kern.h" #include "os.h" - -extern int modify_ldt(int func, void *ptr, unsigned long bytecount); - +#include "proc_mm.h" #include "skas.h" #include "skas_ptrace.h" -#include "asm/mmu_context.h" -#include "proc_mm.h" +#include "sysdep/tls.h" + +extern int modify_ldt(int func, void *ptr, unsigned long bytecount); long write_ldt_entry(struct mm_id * mm_idp, int func, struct user_desc * desc, void **addr, int done) { long res; - if(proc_mm){ - /* This is a special handling for the case, that the mm to + if (proc_mm) { + /* + * This is a special handling for the case, that the mm to * modify isn't current->active_mm. * If this is called directly by modify_ldt, * (current->active_mm->context.skas.u == mm_idp) @@ -40,12 +32,12 @@ long write_ldt_entry(struct mm_id * mm_idp, int func, struct user_desc * desc, * * Note: I'm unsure: should interrupts be disabled here? */ - if(!current->active_mm || current->active_mm == &init_mm || - mm_idp != ¤t->active_mm->context.skas.id) + if (!current->active_mm || current->active_mm == &init_mm || + mm_idp != ¤t->active_mm->context.skas.id) __switch_mm(mm_idp); } - if(ptrace_ldt) { + if (ptrace_ldt) { struct ptrace_ldt ldt_op = (struct ptrace_ldt) { .func = func, .ptr = desc, @@ -53,7 +45,7 @@ long write_ldt_entry(struct mm_id * mm_idp, int func, struct user_desc * desc, u32 cpu; int pid; - if(!proc_mm) + if (!proc_mm) pid = mm_idp->u.pid; else { cpu = get_cpu(); @@ -62,7 +54,7 @@ long write_ldt_entry(struct mm_id * mm_idp, int func, struct user_desc * desc, res = os_ptrace_ldt(pid, 0, (unsigned long) &ldt_op); - if(proc_mm) + if (proc_mm) put_cpu(); } else { @@ -71,7 +63,7 @@ long write_ldt_entry(struct mm_id * mm_idp, int func, struct user_desc * desc, (sizeof(*desc) + sizeof(long) - 1) & ~(sizeof(long) - 1), addr, &stub_addr); - if(!res){ + if (!res) { unsigned long args[] = { func, (unsigned long)stub_addr, sizeof(*desc), @@ -81,12 +73,13 @@ long write_ldt_entry(struct mm_id * mm_idp, int func, struct user_desc * desc, } } - if(proc_mm){ - /* This is the second part of special handling, that makes + if (proc_mm) { + /* + * This is the second part of special handling, that makes * PTRACE_LDT possible to implement. */ - if(current->active_mm && current->active_mm != &init_mm && - mm_idp != ¤t->active_mm->context.skas.id) + if (current->active_mm && current->active_mm != &init_mm && + mm_idp != ¤t->active_mm->context.skas.id) __switch_mm(¤t->active_mm->context.skas.id); } @@ -102,21 +95,22 @@ static long read_ldt_from_host(void __user * ptr, unsigned long bytecount) .ptr = kmalloc(bytecount, GFP_KERNEL)}; u32 cpu; - if(ptrace_ldt.ptr == NULL) + if (ptrace_ldt.ptr == NULL) return -ENOMEM; - /* This is called from sys_modify_ldt only, so userspace_pid gives + /* + * This is called from sys_modify_ldt only, so userspace_pid gives * us the right number */ cpu = get_cpu(); res = os_ptrace_ldt(userspace_pid[cpu], 0, (unsigned long) &ptrace_ldt); put_cpu(); - if(res < 0) + if (res < 0) goto out; n = copy_to_user(ptr, ptrace_ldt.ptr, res); - if(n != 0) + if (n != 0) res = -EFAULT; out: @@ -143,33 +137,32 @@ static int read_ldt(void __user * ptr, unsigned long bytecount) unsigned long size; uml_ldt_t * ldt = ¤t->mm->context.skas.ldt; - if(!ldt->entry_count) + if (!ldt->entry_count) goto out; - if(bytecount > LDT_ENTRY_SIZE*LDT_ENTRIES) + if (bytecount > LDT_ENTRY_SIZE*LDT_ENTRIES) bytecount = LDT_ENTRY_SIZE*LDT_ENTRIES; err = bytecount; - if(ptrace_ldt){ + if (ptrace_ldt) return read_ldt_from_host(ptr, bytecount); - } down(&ldt->semaphore); - if(ldt->entry_count <= LDT_DIRECT_ENTRIES){ + if (ldt->entry_count <= LDT_DIRECT_ENTRIES) { size = LDT_ENTRY_SIZE*LDT_DIRECT_ENTRIES; - if(size > bytecount) + if (size > bytecount) size = bytecount; - if(copy_to_user(ptr, ldt->u.entries, size)) + if (copy_to_user(ptr, ldt->u.entries, size)) err = -EFAULT; bytecount -= size; ptr += size; } else { - for(i=0; i<ldt->entry_count/LDT_ENTRIES_PER_PAGE && bytecount; - i++){ + for (i=0; i<ldt->entry_count/LDT_ENTRIES_PER_PAGE && bytecount; + i++) { size = PAGE_SIZE; - if(size > bytecount) + if (size > bytecount) size = bytecount; - if(copy_to_user(ptr, ldt->u.pages[i], size)){ + if (copy_to_user(ptr, ldt->u.pages[i], size)) { err = -EFAULT; break; } @@ -179,10 +172,10 @@ static int read_ldt(void __user * ptr, unsigned long bytecount) } up(&ldt->semaphore); - if(bytecount == 0 || err == -EFAULT) + if (bytecount == 0 || err == -EFAULT) goto out; - if(clear_user(ptr, bytecount)) + if (clear_user(ptr, bytecount)) err = -EFAULT; out: @@ -193,15 +186,16 @@ static int read_default_ldt(void __user * ptr, unsigned long bytecount) { int err; - if(bytecount > 5*LDT_ENTRY_SIZE) + if (bytecount > 5*LDT_ENTRY_SIZE) bytecount = 5*LDT_ENTRY_SIZE; err = bytecount; - /* UML doesn't support lcall7 and lcall27. + /* + * UML doesn't support lcall7 and lcall27. * So, we don't really have a default ldt, but emulate * an empty ldt of common host default ldt size. */ - if(clear_user(ptr, bytecount)) + if (clear_user(ptr, bytecount)) err = -EFAULT; return err; @@ -217,52 +211,52 @@ static int write_ldt(void __user * ptr, unsigned long bytecount, int func) void *addr = NULL; err = -EINVAL; - if(bytecount != sizeof(ldt_info)) + if (bytecount != sizeof(ldt_info)) goto out; err = -EFAULT; - if(copy_from_user(&ldt_info, ptr, sizeof(ldt_info))) + if (copy_from_user(&ldt_info, ptr, sizeof(ldt_info))) goto out; err = -EINVAL; - if(ldt_info.entry_number >= LDT_ENTRIES) + if (ldt_info.entry_number >= LDT_ENTRIES) goto out; - if(ldt_info.contents == 3){ + if (ldt_info.contents == 3) { if (func == 1) goto out; if (ldt_info.seg_not_present == 0) goto out; } - if(!ptrace_ldt) - down(&ldt->semaphore); + if (!ptrace_ldt) + down(&ldt->semaphore); err = write_ldt_entry(mm_idp, func, &ldt_info, &addr, 1); - if(err) + if (err) goto out_unlock; - else if(ptrace_ldt) { - /* With PTRACE_LDT available, this is used as a flag only */ - ldt->entry_count = 1; - goto out; - } - - if(ldt_info.entry_number >= ldt->entry_count && - ldt_info.entry_number >= LDT_DIRECT_ENTRIES){ - for(i=ldt->entry_count/LDT_ENTRIES_PER_PAGE; - i*LDT_ENTRIES_PER_PAGE <= ldt_info.entry_number; - i++){ - if(i == 0) + else if (ptrace_ldt) { + /* With PTRACE_LDT available, this is used as a flag only */ + ldt->entry_count = 1; + goto out; + } + + if (ldt_info.entry_number >= ldt->entry_count && + ldt_info.entry_number >= LDT_DIRECT_ENTRIES) { + for (i=ldt->entry_count/LDT_ENTRIES_PER_PAGE; + i*LDT_ENTRIES_PER_PAGE <= ldt_info.entry_number; + i++) { + if (i == 0) memcpy(&entry0, ldt->u.entries, sizeof(entry0)); ldt->u.pages[i] = (struct ldt_entry *) __get_free_page(GFP_KERNEL|__GFP_ZERO); - if(!ldt->u.pages[i]){ + if (!ldt->u.pages[i]) { err = -ENOMEM; /* Undo the change in host */ memset(&ldt_info, 0, sizeof(ldt_info)); write_ldt_entry(mm_idp, 1, &ldt_info, &addr, 1); goto out_unlock; } - if(i == 0) { + if (i == 0) { memcpy(ldt->u.pages[0], &entry0, sizeof(entry0)); memcpy(ldt->u.pages[0]+1, ldt->u.entries+1, @@ -271,17 +265,17 @@ static int write_ldt(void __user * ptr, unsigned long bytecount, int func) ldt->entry_count = (i + 1) * LDT_ENTRIES_PER_PAGE; } } - if(ldt->entry_count <= ldt_info.entry_number) + if (ldt->entry_count <= ldt_info.entry_number) ldt->entry_count = ldt_info.entry_number + 1; - if(ldt->entry_count <= LDT_DIRECT_ENTRIES) + if (ldt->entry_count <= LDT_DIRECT_ENTRIES) ldt_p = ldt->u.entries + ldt_info.entry_number; else ldt_p = ldt->u.pages[ldt_info.entry_number/LDT_ENTRIES_PER_PAGE] + ldt_info.entry_number%LDT_ENTRIES_PER_PAGE; - if(ldt_info.base_addr == 0 && ldt_info.limit == 0 && - (func == 1 || LDT_empty(&ldt_info))){ + if (ldt_info.base_addr == 0 && ldt_info.limit == 0 && + (func == 1 || LDT_empty(&ldt_info))) { ldt_p->a = 0; ldt_p->b = 0; } @@ -332,7 +326,7 @@ static void ldt_get_host_info(void) spin_lock(&host_ldt_lock); - if(host_ldt_entries != NULL){ + if (host_ldt_entries != NULL) { spin_unlock(&host_ldt_lock); return; } @@ -340,49 +334,49 @@ static void ldt_get_host_info(void) spin_unlock(&host_ldt_lock); - for(i = LDT_PAGES_MAX-1, order=0; i; i>>=1, order++); + for (i = LDT_PAGES_MAX-1, order=0; i; i>>=1, order++) + ; ldt = (struct ldt_entry *) __get_free_pages(GFP_KERNEL|__GFP_ZERO, order); - if(ldt == NULL) { - printk("ldt_get_host_info: couldn't allocate buffer for host " - "ldt\n"); + if (ldt == NULL) { + printk(KERN_ERR "ldt_get_host_info: couldn't allocate buffer " + "for host ldt\n"); return; } ret = modify_ldt(0, ldt, (1<<order)*PAGE_SIZE); - if(ret < 0) { - printk("ldt_get_host_info: couldn't read host ldt\n"); + if (ret < 0) { + printk(KERN_ERR "ldt_get_host_info: couldn't read host ldt\n"); goto out_free; } - if(ret == 0) { + if (ret == 0) { /* default_ldt is active, simply write an empty entry 0 */ host_ldt_entries = dummy_list; goto out_free; } - for(i=0, size=0; i<ret/LDT_ENTRY_SIZE; i++){ - if(ldt[i].a != 0 || ldt[i].b != 0) + for (i=0, size=0; i<ret/LDT_ENTRY_SIZE; i++) { + if (ldt[i].a != 0 || ldt[i].b != 0) size++; } - if(size < ARRAY_SIZE(dummy_list)) + if (size < ARRAY_SIZE(dummy_list)) host_ldt_entries = dummy_list; else { size = (size + 1) * sizeof(dummy_list[0]); tmp = kmalloc(size, GFP_KERNEL); - if(tmp == NULL) { - printk("ldt_get_host_info: couldn't allocate host ldt " - "list\n"); + if (tmp == NULL) { + printk(KERN_ERR "ldt_get_host_info: couldn't allocate " + "host ldt list\n"); goto out_free; } host_ldt_entries = tmp; } - for(i=0, k=0; i<ret/LDT_ENTRY_SIZE; i++){ - if(ldt[i].a != 0 || ldt[i].b != 0) { + for (i=0, k=0; i<ret/LDT_ENTRY_SIZE; i++) { + if (ldt[i].a != 0 || ldt[i].b != 0) host_ldt_entries[k++] = i; - } } host_ldt_entries[k] = -1; @@ -401,15 +395,15 @@ long init_new_ldt(struct mmu_context_skas * new_mm, struct proc_mm_op copy; - if(!ptrace_ldt) + if (!ptrace_ldt) init_MUTEX(&new_mm->ldt.semaphore); - if(!from_mm){ + if (!from_mm) { memset(&desc, 0, sizeof(desc)); /* * We have to initialize a clean ldt. */ - if(proc_mm) { + if (proc_mm) { /* * If the new mm was created using proc_mm, host's * default-ldt currently is assigned, which normally @@ -417,8 +411,7 @@ long init_new_ldt(struct mmu_context_skas * new_mm, * To remove these gates, we simply write an empty * entry as number 0 to the host. */ - err = write_ldt_entry(&new_mm->id, 1, &desc, - &addr, 1); + err = write_ldt_entry(&new_mm->id, 1, &desc, &addr, 1); } else{ /* @@ -427,11 +420,11 @@ long init_new_ldt(struct mmu_context_skas * new_mm, * will be reset in the following loop */ ldt_get_host_info(); - for(num_p=host_ldt_entries; *num_p != -1; num_p++){ + for (num_p=host_ldt_entries; *num_p != -1; num_p++) { desc.entry_number = *num_p; err = write_ldt_entry(&new_mm->id, 1, &desc, &addr, *(num_p + 1) == -1); - if(err) + if (err) break; } } @@ -440,8 +433,9 @@ long init_new_ldt(struct mmu_context_skas * new_mm, goto out; } - if(proc_mm){ - /* We have a valid from_mm, so we now have to copy the LDT of + if (proc_mm) { + /* + * We have a valid from_mm, so we now have to copy the LDT of * from_mm to new_mm, because using proc_mm an new mm with * an empty/default LDT was created in new_mm() */ @@ -450,27 +444,27 @@ long init_new_ldt(struct mmu_context_skas * new_mm, { .copy_segments = from_mm->id.u.mm_fd } } ); i = os_write_file(new_mm->id.u.mm_fd, ©, sizeof(copy)); - if(i != sizeof(copy)) - printk("new_mm : /proc/mm copy_segments failed, " - "err = %d\n", -i); + if (i != sizeof(copy)) + printk(KERN_ERR "new_mm : /proc/mm copy_segments " + "failed, err = %d\n", -i); } - if(!ptrace_ldt) { - /* Our local LDT is used to supply the data for + if (!ptrace_ldt) { + /* + * Our local LDT is used to supply the data for * modify_ldt(READLDT), if PTRACE_LDT isn't available, * i.e., we have to use the stub for modify_ldt, which * can't handle the big read buffer of up to 64kB. */ down(&from_mm->ldt.semaphore); - if(from_mm->ldt.entry_count <= LDT_DIRECT_ENTRIES){ + if (from_mm->ldt.entry_count <= LDT_DIRECT_ENTRIES) memcpy(new_mm->ldt.u.entries, from_mm->ldt.u.entries, sizeof(new_mm->ldt.u.entries)); - } - else{ + else { i = from_mm->ldt.entry_count / LDT_ENTRIES_PER_PAGE; - while(i-->0){ + while (i-->0) { page = __get_free_page(GFP_KERNEL|__GFP_ZERO); - if (!page){ + if (!page) { err = -ENOMEM; break; } @@ -493,11 +487,10 @@ void free_ldt(struct mmu_context_skas * mm) { int i; - if(!ptrace_ldt && mm->ldt.entry_count > LDT_DIRECT_ENTRIES){ + if (!ptrace_ldt && mm->ldt.entry_count > LDT_DIRECT_ENTRIES) { i = mm->ldt.entry_count / LDT_ENTRIES_PER_PAGE; - while(i-- > 0){ - free_page((long )mm->ldt.u.pages[i]); - } + while (i-- > 0) + free_page((long) mm->ldt.u.pages[i]); } mm->ldt.entry_count = 0; } diff --git a/arch/um/sys-i386/ptrace.c b/arch/um/sys-i386/ptrace.c index dcf0c6b310c8..178f894384f4 100644 --- a/arch/um/sys-i386/ptrace.c +++ b/arch/um/sys-i386/ptrace.c @@ -1,18 +1,11 @@ -/* - * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com) +/* + * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include <linux/compiler.h> -#include "linux/sched.h" #include "linux/mm.h" -#include "asm/elf.h" -#include "asm/ptrace.h" +#include "linux/sched.h" #include "asm/uaccess.h" -#include "asm/unistd.h" -#include "sysdep/ptrace.h" -#include "sysdep/sigcontext.h" -#include "sysdep/sc.h" extern int arch_switch_tls(struct task_struct *from, struct task_struct *to); @@ -23,7 +16,8 @@ void arch_switch_to(struct task_struct *from, struct task_struct *to) return; if (err != -EINVAL) - printk(KERN_WARNING "arch_switch_tls failed, errno %d, not EINVAL\n", -err); + printk(KERN_WARNING "arch_switch_tls failed, errno %d, " + "not EINVAL\n", -err); else printk(KERN_WARNING "arch_switch_tls failed, errno = EINVAL\n"); } @@ -34,21 +28,21 @@ int is_syscall(unsigned long addr) int n; n = copy_from_user(&instr, (void __user *) addr, sizeof(instr)); - if(n){ + if (n) { /* access_process_vm() grants access to vsyscall and stub, * while copy_from_user doesn't. Maybe access_process_vm is * slow, but that doesn't matter, since it will be called only * in case of singlestepping, if copy_from_user failed. */ n = access_process_vm(current, addr, &instr, sizeof(instr), 0); - if(n != sizeof(instr)) { - printk("is_syscall : failed to read instruction from " - "0x%lx\n", addr); - return(1); + if (n != sizeof(instr)) { + printk(KERN_ERR "is_syscall : failed to read " + "instruction from 0x%lx\n", addr); + return 1; } } /* int 0x80 or sysenter */ - return((instr == 0x80cd) || (instr == 0x340f)); + return (instr == 0x80cd) || (instr == 0x340f); } /* determines which flags the user has access to. */ @@ -92,21 +86,21 @@ int putreg(struct task_struct *child, int regno, unsigned long value) int poke_user(struct task_struct *child, long addr, long data) { - if ((addr & 3) || addr < 0) - return -EIO; - - if (addr < MAX_REG_OFFSET) - return putreg(child, addr, data); - - else if((addr >= offsetof(struct user, u_debugreg[0])) && - (addr <= offsetof(struct user, u_debugreg[7]))){ - addr -= offsetof(struct user, u_debugreg[0]); - addr = addr >> 2; - if((addr == 4) || (addr == 5)) return -EIO; - child->thread.arch.debugregs[addr] = data; - return 0; - } - return -EIO; + if ((addr & 3) || addr < 0) + return -EIO; + + if (addr < MAX_REG_OFFSET) + return putreg(child, addr, data); + else if ((addr >= offsetof(struct user, u_debugreg[0])) && + (addr <= offsetof(struct user, u_debugreg[7]))) { + addr -= offsetof(struct user, u_debugreg[0]); + addr = addr >> 2; + if ((addr == 4) || (addr == 5)) + return -EIO; + child->thread.arch.debugregs[addr] = data; + return 0; + } + return -EIO; } unsigned long getreg(struct task_struct *child, int regno) @@ -129,20 +123,20 @@ unsigned long getreg(struct task_struct *child, int regno) return retval; } +/* read the word at location addr in the USER area. */ int peek_user(struct task_struct *child, long addr, long data) { -/* read the word at location addr in the USER area. */ unsigned long tmp; if ((addr & 3) || addr < 0) return -EIO; tmp = 0; /* Default return condition */ - if(addr < MAX_REG_OFFSET){ + if (addr < MAX_REG_OFFSET) { tmp = getreg(child, addr); } - else if((addr >= offsetof(struct user, u_debugreg[0])) && - (addr <= offsetof(struct user, u_debugreg[7]))){ + else if ((addr >= offsetof(struct user, u_debugreg[0])) && + (addr <= offsetof(struct user, u_debugreg[7]))) { addr -= offsetof(struct user, u_debugreg[0]); addr = addr >> 2; tmp = child->thread.arch.debugregs[addr]; @@ -173,15 +167,15 @@ struct i387_fxsave_struct { static inline unsigned short twd_i387_to_fxsr( unsigned short twd ) { unsigned int tmp; /* to avoid 16 bit prefixes in the code */ - + /* Transform each pair of bits into 01 (valid) or 00 (empty) */ - tmp = ~twd; - tmp = (tmp | (tmp>>1)) & 0x5555; /* 0V0V0V0V0V0V0V0V */ - /* and move the valid bits to the lower byte. */ - tmp = (tmp | (tmp >> 1)) & 0x3333; /* 00VV00VV00VV00VV */ - tmp = (tmp | (tmp >> 2)) & 0x0f0f; /* 0000VVVV0000VVVV */ - tmp = (tmp | (tmp >> 4)) & 0x00ff; /* 00000000VVVVVVVV */ - return tmp; + tmp = ~twd; + tmp = (tmp | (tmp>>1)) & 0x5555; /* 0V0V0V0V0V0V0V0V */ + /* and move the valid bits to the lower byte. */ + tmp = (tmp | (tmp >> 1)) & 0x3333; /* 00VV00VV00VV00VV */ + tmp = (tmp | (tmp >> 2)) & 0x0f0f; /* 0000VVVV0000VVVV */ + tmp = (tmp | (tmp >> 4)) & 0x00ff; /* 00000000VVVVVVVV */ + return tmp; } static inline unsigned long twd_fxsr_to_i387( struct i387_fxsave_struct *fxsave ) @@ -235,7 +229,7 @@ static inline int convert_fxsr_to_user(struct _fpstate __user *buf, return 0; } -static inline int convert_fxsr_from_user(struct pt_regs *regs, +static inline int convert_fxsr_from_user(struct pt_regs *regs, struct _fpstate __user *buf) { return 0; @@ -247,18 +241,20 @@ int get_fpregs(unsigned long buf, struct task_struct *child) err = convert_fxsr_to_user((struct _fpstate __user *) buf, &child->thread.regs); - if(err) return(-EFAULT); - else return(0); + if (err) + return -EFAULT; + return 0; } int set_fpregs(unsigned long buf, struct task_struct *child) { int err; - err = convert_fxsr_from_user(&child->thread.regs, + err = convert_fxsr_from_user(&child->thread.regs, (struct _fpstate __user *) buf); - if(err) return(-EFAULT); - else return(0); + if (err) + return -EFAULT; + return 0; } int get_fpxregs(unsigned long buf, struct task_struct *tsk) @@ -284,7 +280,7 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu) fpu->fos = 0; memcpy(fpu->st_space, (void *) SC_FP_ST(PT_REGS_SC(regs)), sizeof(fpu->st_space)); - return(1); + return 1; } #endif @@ -292,14 +288,3 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu ) { return 1; } - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/sys-i386/signal.c b/arch/um/sys-i386/signal.c index c64d48734e3a..c82e5f562ec6 100644 --- a/arch/um/sys-i386/signal.c +++ b/arch/um/sys-i386/signal.c @@ -1,17 +1,13 @@ /* - * Copyright (C) 2004 Jeff Dike (jdike@addtoit.com) + * Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ -#include "linux/signal.h" #include "linux/ptrace.h" -#include "asm/current.h" -#include "asm/ucontext.h" -#include "asm/uaccess.h" #include "asm/unistd.h" +#include "asm/uaccess.h" +#include "asm/ucontext.h" #include "frame_kern.h" -#include "sigcontext.h" -#include "registers.h" #include "skas.h" void copy_sc(struct uml_pt_regs *regs, void *from) @@ -39,21 +35,21 @@ void copy_sc(struct uml_pt_regs *regs, void *from) static int copy_sc_from_user(struct pt_regs *regs, struct sigcontext __user *from) { - struct sigcontext sc; + struct sigcontext sc; unsigned long fpregs[HOST_FP_SIZE]; int err; err = copy_from_user(&sc, from, sizeof(sc)); err |= copy_from_user(fpregs, sc.fpstate, sizeof(fpregs)); - if(err) + if (err) return err; copy_sc(®s->regs, &sc); err = restore_fp_registers(userspace_pid[0], fpregs); - if(err < 0) { - printk("copy_sc_from_user_skas - PTRACE_SETFPREGS failed, " - "errno = %d\n", -err); + if (err < 0) { + printk(KERN_ERR "copy_sc_from_user_skas - PTRACE_SETFPREGS " + "failed, errno = %d\n", -err); return err; } @@ -64,7 +60,7 @@ static int copy_sc_to_user(struct sigcontext __user *to, struct _fpstate __user *to_fp, struct pt_regs *regs, unsigned long sp) { - struct sigcontext sc; + struct sigcontext sc; unsigned long fpregs[HOST_FP_SIZE]; struct faultinfo * fi = ¤t->thread.arch.faultinfo; int err; @@ -86,28 +82,29 @@ static int copy_sc_to_user(struct sigcontext __user *to, sc.eflags = REGS_EFLAGS(regs->regs.regs); sc.esp_at_signal = regs->regs.regs[UESP]; sc.ss = regs->regs.regs[SS]; - sc.cr2 = fi->cr2; - sc.err = fi->error_code; - sc.trapno = fi->trap_no; + sc.cr2 = fi->cr2; + sc.err = fi->error_code; + sc.trapno = fi->trap_no; err = save_fp_registers(userspace_pid[0], fpregs); - if(err < 0){ - printk("copy_sc_to_user_skas - PTRACE_GETFPREGS failed, " - "errno = %d\n", err); + if (err < 0) { + printk(KERN_ERR "copy_sc_to_user_skas - PTRACE_GETFPREGS " + "failed, errno = %d\n", err); return 1; } to_fp = (to_fp ? to_fp : (struct _fpstate __user *) (to + 1)); sc.fpstate = to_fp; - if(err) + if (err) return err; return copy_to_user(to, &sc, sizeof(sc)) || copy_to_user(to_fp, fpregs, sizeof(fpregs)); } -static int copy_ucontext_to_user(struct ucontext __user *uc, struct _fpstate __user *fp, - sigset_t *set, unsigned long sp) +static int copy_ucontext_to_user(struct ucontext __user *uc, + struct _fpstate __user *fp, sigset_t *set, + unsigned long sp) { int err = 0; @@ -157,7 +154,7 @@ int setup_signal_stack_sc(unsigned long stack_top, int sig, return 1; restorer = frame->retcode; - if(ka->sa.sa_flags & SA_RESTORER) + if (ka->sa.sa_flags & SA_RESTORER) restorer = ka->sa.sa_restorer; /* Update SP now because the page fault handler refuses to extend @@ -189,7 +186,7 @@ int setup_signal_stack_sc(unsigned long stack_top, int sig, err |= __put_user(__NR_sigreturn, (int __user *)(frame->retcode+2)); err |= __put_user(0x80cd, (short __user *)(frame->retcode+6)); - if(err) + if (err) goto err; PT_REGS_SP(regs) = (unsigned long) frame; @@ -222,7 +219,7 @@ int setup_signal_stack_si(unsigned long stack_top, int sig, return 1; restorer = frame->retcode; - if(ka->sa.sa_flags & SA_RESTORER) + if (ka->sa.sa_flags & SA_RESTORER) restorer = ka->sa.sa_restorer; /* See comment above about why this is here */ @@ -247,7 +244,7 @@ int setup_signal_stack_si(unsigned long stack_top, int sig, err |= __put_user(__NR_rt_sigreturn, (int __user *)(frame->retcode+1)); err |= __put_user(0x80cd, (short __user *)(frame->retcode+5)); - if(err) + if (err) goto err; PT_REGS_IP(regs) = (unsigned long) ka->sa.sa_handler; @@ -274,8 +271,8 @@ long sys_sigreturn(struct pt_regs regs) unsigned long __user *extramask = frame->extramask; int sig_size = (_NSIG_WORDS - 1) * sizeof(unsigned long); - if(copy_from_user(&set.sig[0], oldmask, sizeof(set.sig[0])) || - copy_from_user(&set.sig[1], extramask, sig_size)) + if (copy_from_user(&set.sig[0], oldmask, sizeof(set.sig[0])) || + copy_from_user(&set.sig[1], extramask, sig_size)) goto segfault; sigdelsetmask(&set, ~_BLOCKABLE); @@ -285,7 +282,7 @@ long sys_sigreturn(struct pt_regs regs) recalc_sigpending(); spin_unlock_irq(¤t->sighand->siglock); - if(copy_sc_from_user(¤t->thread.regs, sc)) + if (copy_sc_from_user(¤t->thread.regs, sc)) goto segfault; /* Avoid ERESTART handling */ @@ -300,12 +297,13 @@ long sys_sigreturn(struct pt_regs regs) long sys_rt_sigreturn(struct pt_regs regs) { unsigned long sp = PT_REGS_SP(¤t->thread.regs); - struct rt_sigframe __user *frame = (struct rt_sigframe __user *) (sp - 4); + struct rt_sigframe __user *frame = + (struct rt_sigframe __user *) (sp - 4); sigset_t set; struct ucontext __user *uc = &frame->uc; int sig_size = _NSIG_WORDS * sizeof(unsigned long); - if(copy_from_user(&set, &uc->uc_sigmask, sig_size)) + if (copy_from_user(&set, &uc->uc_sigmask, sig_size)) goto segfault; sigdelsetmask(&set, ~_BLOCKABLE); @@ -315,7 +313,7 @@ long sys_rt_sigreturn(struct pt_regs regs) recalc_sigpending(); spin_unlock_irq(¤t->sighand->siglock); - if(copy_sc_from_user(¤t->thread.regs, &uc->uc_mcontext)) + if (copy_sc_from_user(¤t->thread.regs, &uc->uc_mcontext)) goto segfault; /* Avoid ERESTART handling */ diff --git a/arch/um/sys-i386/tls.c b/arch/um/sys-i386/tls.c index 6cb7cbd137a0..b02266ab5c55 100644 --- a/arch/um/sys-i386/tls.c +++ b/arch/um/sys-i386/tls.c @@ -3,19 +3,12 @@ * Licensed under the GPL */ -#include "linux/kernel.h" +#include "linux/percpu.h" #include "linux/sched.h" -#include "linux/slab.h" -#include "linux/types.h" #include "asm/uaccess.h" -#include "asm/ptrace.h" -#include "asm/segment.h" -#include "asm/smp.h" -#include "asm/desc.h" -#include "kern.h" -#include "kern_util.h" #include "os.h" #include "skas.h" +#include "sysdep/tls.h" /* * If needed we can detect when it's uninitialized. @@ -74,7 +67,8 @@ static inline void clear_user_desc(struct user_desc* info) /* Postcondition: LDT_empty(info) returns true. */ memset(info, 0, sizeof(*info)); - /* Check the LDT_empty or the i386 sys_get_thread_area code - we obtain + /* + * Check the LDT_empty or the i386 sys_get_thread_area code - we obtain * indeed an empty user_desc. */ info->read_exec_only = 1; @@ -89,10 +83,13 @@ static int load_TLS(int flags, struct task_struct *to) int idx; for (idx = GDT_ENTRY_TLS_MIN; idx < GDT_ENTRY_TLS_MAX; idx++) { - struct uml_tls_struct* curr = &to->thread.arch.tls_array[idx - GDT_ENTRY_TLS_MIN]; + struct uml_tls_struct* curr = + &to->thread.arch.tls_array[idx - GDT_ENTRY_TLS_MIN]; - /* Actually, now if it wasn't flushed it gets cleared and - * flushed to the host, which will clear it.*/ + /* + * Actually, now if it wasn't flushed it gets cleared and + * flushed to the host, which will clear it. + */ if (!curr->present) { if (!curr->flushed) { clear_user_desc(&curr->tls); @@ -116,7 +113,8 @@ out: return ret; } -/* Verify if we need to do a flush for the new process, i.e. if there are any +/* + * Verify if we need to do a flush for the new process, i.e. if there are any * present desc's, only if they haven't been flushed. */ static inline int needs_TLS_update(struct task_struct *task) @@ -125,10 +123,13 @@ static inline int needs_TLS_update(struct task_struct *task) int ret = 0; for (i = GDT_ENTRY_TLS_MIN; i < GDT_ENTRY_TLS_MAX; i++) { - struct uml_tls_struct* curr = &task->thread.arch.tls_array[i - GDT_ENTRY_TLS_MIN]; + struct uml_tls_struct* curr = + &task->thread.arch.tls_array[i - GDT_ENTRY_TLS_MIN]; - /* Can't test curr->present, we may need to clear a descriptor - * which had a value. */ + /* + * Can't test curr->present, we may need to clear a descriptor + * which had a value. + */ if (curr->flushed) continue; ret = 1; @@ -137,7 +138,8 @@ static inline int needs_TLS_update(struct task_struct *task) return ret; } -/* On a newly forked process, the TLS descriptors haven't yet been flushed. So +/* + * On a newly forked process, the TLS descriptors haven't yet been flushed. So * we mark them as such and the first switch_to will do the job. */ void clear_flushed_tls(struct task_struct *task) @@ -145,10 +147,13 @@ void clear_flushed_tls(struct task_struct *task) int i; for (i = GDT_ENTRY_TLS_MIN; i < GDT_ENTRY_TLS_MAX; i++) { - struct uml_tls_struct* curr = &task->thread.arch.tls_array[i - GDT_ENTRY_TLS_MIN]; + struct uml_tls_struct* curr = + &task->thread.arch.tls_array[i - GDT_ENTRY_TLS_MIN]; - /* Still correct to do this, if it wasn't present on the host it - * will remain as flushed as it was. */ + /* + * Still correct to do this, if it wasn't present on the host it + * will remain as flushed as it was. + */ if (!curr->present) continue; @@ -156,23 +161,27 @@ void clear_flushed_tls(struct task_struct *task) } } -/* In SKAS0 mode, currently, multiple guest threads sharing the same ->mm have a +/* + * In SKAS0 mode, currently, multiple guest threads sharing the same ->mm have a * common host process. So this is needed in SKAS0 too. * * However, if each thread had a different host process (and this was discussed * for SMP support) this won't be needed. * * And this will not need be used when (and if) we'll add support to the host - * SKAS patch. */ + * SKAS patch. + */ int arch_switch_tls(struct task_struct *from, struct task_struct *to) { if (!host_supports_tls) return 0; - /* We have no need whatsoever to switch TLS for kernel threads; beyond + /* + * We have no need whatsoever to switch TLS for kernel threads; beyond * that, that would also result in us calling os_set_thread_area with - * userspace_pid[cpu] == 0, which gives an error. */ + * userspace_pid[cpu] == 0, which gives an error. + */ if (likely(to->mm)) return load_TLS(O_FORCE, to); @@ -232,17 +241,20 @@ static int get_tls_entry(struct task_struct* task, struct user_desc *info, int i *info = t->arch.tls_array[idx - GDT_ENTRY_TLS_MIN].tls; out: - /* Temporary debugging check, to make sure that things have been + /* + * Temporary debugging check, to make sure that things have been * flushed. This could be triggered if load_TLS() failed. */ - if (unlikely(task == current && !t->arch.tls_array[idx - GDT_ENTRY_TLS_MIN].flushed)) { + if (unlikely(task == current && + !t->arch.tls_array[idx - GDT_ENTRY_TLS_MIN].flushed)) { printk(KERN_ERR "get_tls_entry: task with pid %d got here " "without flushed TLS.", current->pid); } return 0; clear: - /* When the TLS entry has not been set, the values read to user in the + /* + * When the TLS entry has not been set, the values read to user in the * tls_array are 0 (because it's cleared at boot, see * arch/i386/kernel/head.S:cpu_gdt_table). Emulate that. */ @@ -344,8 +356,10 @@ out: } -/* XXX: This part is probably common to i386 and x86-64. Don't create a common - * file for now, do that when implementing x86-64 support.*/ +/* + * XXX: This part is probably common to i386 and x86-64. Don't create a common + * file for now, do that when implementing x86-64 support. + */ static int __init __setup_host_supports_tls(void) { check_host_supports_tls(&host_supports_tls, &host_gdt_entry_tls_min); diff --git a/arch/um/sys-x86_64/fault.c b/arch/um/sys-x86_64/fault.c index 79f37ef3dceb..ce85117fc64e 100644 --- a/arch/um/sys-x86_64/fault.c +++ b/arch/um/sys-x86_64/fault.c @@ -14,14 +14,15 @@ struct exception_table_entry }; const struct exception_table_entry *search_exception_tables(unsigned long add); + int arch_fixup(unsigned long address, struct uml_pt_regs *regs) { const struct exception_table_entry *fixup; fixup = search_exception_tables(address); - if(fixup != 0){ + if (fixup != 0) { UPT_IP(regs) = fixup->fixup; - return(1); + return 1; } - return(0); + return 0; } diff --git a/arch/um/sys-x86_64/signal.c b/arch/um/sys-x86_64/signal.c index a06d66d0c409..9001d17fc3d8 100644 --- a/arch/um/sys-x86_64/signal.c +++ b/arch/um/sys-x86_64/signal.c @@ -3,16 +3,11 @@ * Licensed under the GPL */ -#include "linux/stddef.h" -#include "linux/errno.h" #include "linux/personality.h" #include "linux/ptrace.h" -#include "asm/current.h" +#include "asm/unistd.h" #include "asm/uaccess.h" -#include "asm/sigcontext.h" -#include "asm/ptrace.h" -#include "asm/arch/ucontext.h" -#include "sysdep/ptrace.h" +#include "asm/ucontext.h" #include "frame_kern.h" #include "skas.h" @@ -20,28 +15,28 @@ void copy_sc(struct uml_pt_regs *regs, void *from) { struct sigcontext *sc = from; -#define GETREG(regs, regno, sc, regname) \ - (regs)->regs[(regno) / sizeof(unsigned long)] = (sc)->regname - - GETREG(regs, R8, sc, r8); - GETREG(regs, R9, sc, r9); - GETREG(regs, R10, sc, r10); - GETREG(regs, R11, sc, r11); - GETREG(regs, R12, sc, r12); - GETREG(regs, R13, sc, r13); - GETREG(regs, R14, sc, r14); - GETREG(regs, R15, sc, r15); - GETREG(regs, RDI, sc, rdi); - GETREG(regs, RSI, sc, rsi); - GETREG(regs, RBP, sc, rbp); - GETREG(regs, RBX, sc, rbx); - GETREG(regs, RDX, sc, rdx); - GETREG(regs, RAX, sc, rax); - GETREG(regs, RCX, sc, rcx); - GETREG(regs, RSP, sc, rsp); - GETREG(regs, RIP, sc, rip); - GETREG(regs, EFLAGS, sc, eflags); - GETREG(regs, CS, sc, cs); +#define GETREG(regs, regno, sc, regname) \ + (regs)->regs[(regno) / sizeof(unsigned long)] = (sc)->regname + + GETREG(regs, R8, sc, r8); + GETREG(regs, R9, sc, r9); + GETREG(regs, R10, sc, r10); + GETREG(regs, R11, sc, r11); + GETREG(regs, R12, sc, r12); + GETREG(regs, R13, sc, r13); + GETREG(regs, R14, sc, r14); + GETREG(regs, R15, sc, r15); + GETREG(regs, RDI, sc, rdi); + GETREG(regs, RSI, sc, rsi); + GETREG(regs, RBP, sc, rbp); + GETREG(regs, RBX, sc, rbx); + GETREG(regs, RDX, sc, rdx); + GETREG(regs, RAX, sc, rax); + GETREG(regs, RCX, sc, rcx); + GETREG(regs, RSP, sc, rsp); + GETREG(regs, RIP, sc, rip); + GETREG(regs, EFLAGS, sc, eflags); + GETREG(regs, CS, sc, cs); #undef GETREG } @@ -49,58 +44,58 @@ void copy_sc(struct uml_pt_regs *regs, void *from) static int copy_sc_from_user(struct pt_regs *regs, struct sigcontext __user *from) { - int err = 0; - -#define GETREG(regs, regno, sc, regname) \ - __get_user((regs)->regs.regs[(regno) / sizeof(unsigned long)], \ - &(sc)->regname) - - err |= GETREG(regs, R8, from, r8); - err |= GETREG(regs, R9, from, r9); - err |= GETREG(regs, R10, from, r10); - err |= GETREG(regs, R11, from, r11); - err |= GETREG(regs, R12, from, r12); - err |= GETREG(regs, R13, from, r13); - err |= GETREG(regs, R14, from, r14); - err |= GETREG(regs, R15, from, r15); - err |= GETREG(regs, RDI, from, rdi); - err |= GETREG(regs, RSI, from, rsi); - err |= GETREG(regs, RBP, from, rbp); - err |= GETREG(regs, RBX, from, rbx); - err |= GETREG(regs, RDX, from, rdx); - err |= GETREG(regs, RAX, from, rax); - err |= GETREG(regs, RCX, from, rcx); - err |= GETREG(regs, RSP, from, rsp); - err |= GETREG(regs, RIP, from, rip); - err |= GETREG(regs, EFLAGS, from, eflags); - err |= GETREG(regs, CS, from, cs); + int err = 0; + +#define GETREG(regs, regno, sc, regname) \ + __get_user((regs)->regs.regs[(regno) / sizeof(unsigned long)], \ + &(sc)->regname) + + err |= GETREG(regs, R8, from, r8); + err |= GETREG(regs, R9, from, r9); + err |= GETREG(regs, R10, from, r10); + err |= GETREG(regs, R11, from, r11); + err |= GETREG(regs, R12, from, r12); + err |= GETREG(regs, R13, from, r13); + err |= GETREG(regs, R14, from, r14); + err |= GETREG(regs, R15, from, r15); + err |= GETREG(regs, RDI, from, rdi); + err |= GETREG(regs, RSI, from, rsi); + err |= GETREG(regs, RBP, from, rbp); + err |= GETREG(regs, RBX, from, rbx); + err |= GETREG(regs, RDX, from, rdx); + err |= GETREG(regs, RAX, from, rax); + err |= GETREG(regs, RCX, from, rcx); + err |= GETREG(regs, RSP, from, rsp); + err |= GETREG(regs, RIP, from, rip); + err |= GETREG(regs, EFLAGS, from, eflags); + err |= GETREG(regs, CS, from, cs); #undef GETREG - return err; + return err; } static int copy_sc_to_user(struct sigcontext __user *to, struct _fpstate __user *to_fp, struct pt_regs *regs, unsigned long mask, unsigned long sp) { - struct faultinfo * fi = ¤t->thread.arch.faultinfo; + struct faultinfo * fi = ¤t->thread.arch.faultinfo; int err = 0; err |= __put_user(0, &to->gs); err |= __put_user(0, &to->fs); -#define PUTREG(regs, regno, sc, regname) \ - __put_user((regs)->regs.regs[(regno) / sizeof(unsigned long)], \ - &(sc)->regname) +#define PUTREG(regs, regno, sc, regname) \ + __put_user((regs)->regs.regs[(regno) / sizeof(unsigned long)], \ + &(sc)->regname) err |= PUTREG(regs, RDI, to, rdi); err |= PUTREG(regs, RSI, to, rsi); err |= PUTREG(regs, RBP, to, rbp); - /* Must use orignal RSP, which is passed in, rather than what's in - * the pt_regs, because that's already been updated to point at the - * signal frame. - */ + /* Must use orignal RSP, which is passed in, rather than what's in + * the pt_regs, because that's already been updated to point at the + * signal frame. + */ err |= __put_user(sp, &to->rsp); err |= PUTREG(regs, RBX, to, rbx); err |= PUTREG(regs, RDX, to, rdx); @@ -116,9 +111,9 @@ static int copy_sc_to_user(struct sigcontext __user *to, err |= PUTREG(regs, R15, to, r15); err |= PUTREG(regs, CS, to, cs); /* XXX x86_64 doesn't do this */ - err |= __put_user(fi->cr2, &to->cr2); - err |= __put_user(fi->error_code, &to->err); - err |= __put_user(fi->trap_no, &to->trapno); + err |= __put_user(fi->cr2, &to->cr2); + err |= __put_user(fi->error_code, &to->err); + err |= __put_user(fi->trap_no, &to->trapno); err |= PUTREG(regs, RIP, to, rip); err |= PUTREG(regs, EFLAGS, to, eflags); @@ -131,9 +126,9 @@ static int copy_sc_to_user(struct sigcontext __user *to, struct rt_sigframe { - char __user *pretcode; - struct ucontext uc; - struct siginfo info; + char __user *pretcode; + struct ucontext uc; + struct siginfo info; }; #define round_down(m, n) (((m) / (n)) * (n)) @@ -151,7 +146,7 @@ int setup_signal_stack_si(unsigned long stack_top, int sig, frame = (struct rt_sigframe __user *) round_down(stack_top - sizeof(struct rt_sigframe), 16); /* Subtract 128 for a red zone and 8 for proper alignment */ - frame = (struct rt_sigframe __user *) ((unsigned long) frame - 128 - 8); + frame = (struct rt_sigframe __user *) ((unsigned long) frame - 128 - 8); if (!access_ok(VERIFY_WRITE, fp, sizeof(struct _fpstate))) goto out; @@ -241,7 +236,7 @@ long sys_rt_sigreturn(struct pt_regs *regs) struct ucontext __user *uc = &frame->uc; sigset_t set; - if(copy_from_user(&set, &uc->uc_sigmask, sizeof(set))) + if (copy_from_user(&set, &uc->uc_sigmask, sizeof(set))) goto segfault; sigdelsetmask(&set, ~_BLOCKABLE); @@ -251,7 +246,7 @@ long sys_rt_sigreturn(struct pt_regs *regs) recalc_sigpending(); spin_unlock_irq(¤t->sighand->siglock); - if(copy_sc_from_user(¤t->thread.regs, &uc->uc_mcontext)) + if (copy_sc_from_user(¤t->thread.regs, &uc->uc_mcontext)) goto segfault; /* Avoid ERESTART handling */ @@ -262,13 +257,3 @@ long sys_rt_sigreturn(struct pt_regs *regs) force_sig(SIGSEGV, current); return 0; } -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/sys-x86_64/syscalls.c b/arch/um/sys-x86_64/syscalls.c index bbcab773b23d..58ae06562b4a 100644 --- a/arch/um/sys-x86_64/syscalls.c +++ b/arch/um/sys-x86_64/syscalls.c @@ -1,36 +1,34 @@ /* + * Copyright (C) 2003 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Copyright 2003 PathScale, Inc. * * Licensed under the GPL */ #include "linux/linkage.h" -#include "linux/slab.h" -#include "linux/shm.h" -#include "linux/utsname.h" #include "linux/personality.h" -#include "asm/uaccess.h" -#define __FRAME_OFFSETS -#include "asm/ptrace.h" -#include "asm/unistd.h" +#include "linux/utsname.h" #include "asm/prctl.h" /* XXX This should get the constants from libc */ -#include "kern.h" +#include "asm/uaccess.h" #include "os.h" asmlinkage long sys_uname64(struct new_utsname __user * name) { int err; + down_read(&uts_sem); err = copy_to_user(name, utsname(), sizeof (*name)); up_read(&uts_sem); + if (personality(current->personality) == PER_LINUX32) err |= copy_to_user(&name->machine, "i686", 5); + return err ? -EFAULT : 0; } long arch_prctl(struct task_struct *task, int code, unsigned long __user *addr) { - unsigned long *ptr = addr, tmp; + unsigned long *ptr = addr, tmp; long ret; int pid = task->mm->context.skas.id.u.pid; @@ -47,42 +45,42 @@ long arch_prctl(struct task_struct *task, int code, unsigned long __user *addr) * arch_prctl is run on the host, then the registers are read * back. */ - switch(code){ + switch (code) { case ARCH_SET_FS: case ARCH_SET_GS: - restore_registers(pid, ¤t->thread.regs.regs); - break; - case ARCH_GET_FS: - case ARCH_GET_GS: - /* - * With these two, we read to a local pointer and - * put_user it to the userspace pointer that we were - * given. If addr isn't valid (because it hasn't been - * faulted in or is just bogus), we want put_user to - * fault it in (or return -EFAULT) instead of having - * the host return -EFAULT. - */ - ptr = &tmp; - } + restore_registers(pid, ¤t->thread.regs.regs); + break; + case ARCH_GET_FS: + case ARCH_GET_GS: + /* + * With these two, we read to a local pointer and + * put_user it to the userspace pointer that we were + * given. If addr isn't valid (because it hasn't been + * faulted in or is just bogus), we want put_user to + * fault it in (or return -EFAULT) instead of having + * the host return -EFAULT. + */ + ptr = &tmp; + } - ret = os_arch_prctl(pid, code, ptr); - if(ret) - return ret; + ret = os_arch_prctl(pid, code, ptr); + if (ret) + return ret; - switch(code){ + switch (code) { case ARCH_SET_FS: current->thread.arch.fs = (unsigned long) ptr; save_registers(pid, ¤t->thread.regs.regs); break; case ARCH_SET_GS: - save_registers(pid, ¤t->thread.regs.regs); + save_registers(pid, ¤t->thread.regs.regs); break; case ARCH_GET_FS: ret = put_user(tmp, addr); - break; + break; case ARCH_GET_GS: ret = put_user(tmp, addr); - break; + break; } return ret; @@ -109,8 +107,8 @@ long sys_clone(unsigned long clone_flags, unsigned long newsp, void arch_switch_to(struct task_struct *from, struct task_struct *to) { - if((to->thread.arch.fs == 0) || (to->mm == NULL)) - return; + if ((to->thread.arch.fs == 0) || (to->mm == NULL)) + return; - arch_prctl(to, ARCH_SET_FS, (void __user *) to->thread.arch.fs); + arch_prctl(to, ARCH_SET_FS, (void __user *) to->thread.arch.fs); } diff --git a/arch/um/sys-x86_64/tls.c b/arch/um/sys-x86_64/tls.c index fcd5217c26a5..3bd19a51ad6b 100644 --- a/arch/um/sys-x86_64/tls.c +++ b/arch/um/sys-x86_64/tls.c @@ -13,5 +13,5 @@ int arch_copy_tls(struct task_struct *t) */ t->thread.arch.fs = t->thread.regs.regs.regs[R8 / sizeof(long)]; - return 0; + return 0; } |