diff options
Diffstat (limited to 'arch/um/sys-x86_64')
| -rw-r--r-- | arch/um/sys-x86_64/Makefile | 2 | ||||
| -rw-r--r-- | arch/um/sys-x86_64/bug.c | 20 | ||||
| -rw-r--r-- | arch/um/sys-x86_64/unmap.c | 11 |
3 files changed, 28 insertions, 5 deletions
diff --git a/arch/um/sys-x86_64/Makefile b/arch/um/sys-x86_64/Makefile index f41768b8e25e..4d9e5efa6fb9 100644 --- a/arch/um/sys-x86_64/Makefile +++ b/arch/um/sys-x86_64/Makefile @@ -4,7 +4,7 @@ # Licensed under the GPL # -obj-y = bugs.o delay.o fault.o ldt.o mem.o ptrace.o ptrace_user.o \ +obj-y = bug.o bugs.o delay.o fault.o ldt.o mem.o ptrace.o ptrace_user.o \ setjmp.o sigcontext.o signal.o syscalls.o syscall_table.o sysrq.o \ ksyms.o tls.o diff --git a/arch/um/sys-x86_64/bug.c b/arch/um/sys-x86_64/bug.c new file mode 100644 index 000000000000..200c8ba2879b --- /dev/null +++ b/arch/um/sys-x86_64/bug.c @@ -0,0 +1,20 @@ +/* + * Copyright (C) 2006 Jeff Dike (jdike@addtoit.com) + * Licensed under the GPL V2 + */ + +#include <linux/uaccess.h> + +/* Mostly copied from i386/x86_86 - eliminated the eip < PAGE_OFFSET because + * that's not relevent in skas mode. + */ + +int is_valid_bugaddr(unsigned long eip) +{ + unsigned short ud2; + + if (probe_kernel_address((unsigned short __user *)eip, ud2)) + return 0; + + return ud2 == 0x0b0f; +} diff --git a/arch/um/sys-x86_64/unmap.c b/arch/um/sys-x86_64/unmap.c index 57c9286a701b..f4a4bffd8a18 100644 --- a/arch/um/sys-x86_64/unmap.c +++ b/arch/um/sys-x86_64/unmap.c @@ -5,17 +5,20 @@ #include <linux/mman.h> #include <asm/unistd.h> -#include <sys/syscall.h> +static int errno; + +static inline _syscall2(int,munmap,void *,start,size_t,len) +static inline _syscall6(void *,mmap,void *,addr,size_t,len,int,prot,int,flags,int,fd,off_t,offset) int switcheroo(int fd, int prot, void *from, void *to, int size) { - if (syscall(__NR_munmap, to, size) < 0){ + if(munmap(to, size) < 0){ return(-1); } - if (syscall(__NR_mmap, to, size, prot, MAP_SHARED | MAP_FIXED, fd, 0) == (void*) -1){ + if(mmap(to, size, prot, MAP_SHARED | MAP_FIXED, fd, 0) == (void*) -1){ return(-1); } - if (syscall(__NR_munmap, from, size) < 0){ + if(munmap(from, size) < 0){ return(-1); } return(0); |