diff options
| -rw-r--r-- | arch/powerpc/Kconfig | 1 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/syscalls.h | 4 | ||||
| -rw-r--r-- | arch/powerpc/kernel/ppc32.h | 8 | ||||
| -rw-r--r-- | arch/powerpc/kernel/signal.c | 7 | ||||
| -rw-r--r-- | arch/powerpc/kernel/signal_32.c | 69 | ||||
| -rw-r--r-- | arch/powerpc/kernel/signal_64.c | 11 |
6 files changed, 13 insertions, 87 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 17903f1f356b..dd52babec7d7 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -144,6 +144,7 @@ config PPC select HAVE_MOD_ARCH_SPECIFIC select MODULES_USE_ELF_RELA select CLONE_BACKWARDS + select GENERIC_SIGALTSTACK config EARLY_PRINTK bool diff --git a/arch/powerpc/include/asm/syscalls.h b/arch/powerpc/include/asm/syscalls.h index 6949c42ffac2..01d240ded0d5 100644 --- a/arch/powerpc/include/asm/syscalls.h +++ b/arch/powerpc/include/asm/syscalls.h @@ -22,9 +22,5 @@ asmlinkage long ppc64_personality(unsigned long personality); asmlinkage int ppc_rtas(struct rtas_args __user *uargs); asmlinkage time_t sys64_time(time_t __user * tloc); -asmlinkage long sys_sigaltstack(const stack_t __user *uss, - stack_t __user *uoss, unsigned long r5, unsigned long r6, - unsigned long r7, unsigned long r8, struct pt_regs *regs); - #endif /* __KERNEL__ */ #endif /* __ASM_POWERPC_SYSCALLS_H */ diff --git a/arch/powerpc/kernel/ppc32.h b/arch/powerpc/kernel/ppc32.h index 02fb0ee26093..f6bee3e6f438 100644 --- a/arch/powerpc/kernel/ppc32.h +++ b/arch/powerpc/kernel/ppc32.h @@ -34,12 +34,6 @@ struct sigaction32 { compat_sigset_t sa_mask; /* A 32 bit mask */ }; -typedef struct sigaltstack_32 { - unsigned int ss_sp; - int ss_flags; - compat_size_t ss_size; -} stack_32_t; - struct pt_regs32 { unsigned int gpr[32]; unsigned int nip; @@ -75,7 +69,7 @@ struct mcontext32 { struct ucontext32 { unsigned int uc_flags; unsigned int uc_link; - stack_32_t uc_stack; + compat_stack_t uc_stack; int uc_pad[7]; compat_uptr_t uc_regs; /* points to uc_mcontext field */ compat_sigset_t uc_sigmask; /* mask last for extensibility */ diff --git a/arch/powerpc/kernel/signal.c b/arch/powerpc/kernel/signal.c index 3b997118df50..fa99dc54965c 100644 --- a/arch/powerpc/kernel/signal.c +++ b/arch/powerpc/kernel/signal.c @@ -169,10 +169,3 @@ void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags) tracehook_notify_resume(regs); } } - -long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss, - unsigned long r5, unsigned long r6, unsigned long r7, - unsigned long r8, struct pt_regs *regs) -{ - return do_sigaltstack(uss, uoss, regs->gpr[1]); -} diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c index 9ec3fed3caac..0ea248c893cb 100644 --- a/arch/powerpc/kernel/signal_32.c +++ b/arch/powerpc/kernel/signal_32.c @@ -67,6 +67,8 @@ #define mcontext mcontext32 #define ucontext ucontext32 +#define __save_altstack __compat_save_altstack + /* * Userspace code may pass a ucontext which doesn't include VSX added * at the end. We need to check for this case. @@ -763,55 +765,6 @@ long compat_sys_rt_sigqueueinfo(u32 pid, u32 sig, compat_siginfo_t __user *uinfo set_fs (old_fs); return ret; } -/* - * Start Alternate signal stack support - * - * System Calls - * sigaltatck compat_sys_sigaltstack - */ - -int compat_sys_sigaltstack(u32 __new, u32 __old, int r5, - int r6, int r7, int r8, struct pt_regs *regs) -{ - stack_32_t __user * newstack = compat_ptr(__new); - stack_32_t __user * oldstack = compat_ptr(__old); - stack_t uss, uoss; - int ret; - mm_segment_t old_fs; - unsigned long sp; - compat_uptr_t ss_sp; - - /* - * set sp to the user stack on entry to the system call - * the system call router sets R9 to the saved registers - */ - sp = regs->gpr[1]; - - /* Put new stack info in local 64 bit stack struct */ - if (newstack) { - if (get_user(ss_sp, &newstack->ss_sp) || - __get_user(uss.ss_flags, &newstack->ss_flags) || - __get_user(uss.ss_size, &newstack->ss_size)) - return -EFAULT; - uss.ss_sp = compat_ptr(ss_sp); - } - - old_fs = get_fs(); - set_fs(KERNEL_DS); - /* The __user pointer casts are valid because of the set_fs() */ - ret = do_sigaltstack( - newstack ? (stack_t __user *) &uss : NULL, - oldstack ? (stack_t __user *) &uoss : NULL, - sp); - set_fs(old_fs); - /* Copy the stack information to the user output buffer */ - if (!ret && oldstack && - (put_user(ptr_to_compat(uoss.ss_sp), &oldstack->ss_sp) || - __put_user(uoss.ss_flags, &oldstack->ss_flags) || - __put_user(uoss.ss_size, &oldstack->ss_size))) - return -EFAULT; - return ret; -} #endif /* CONFIG_PPC64 */ /* @@ -838,10 +791,7 @@ int handle_rt_signal32(unsigned long sig, struct k_sigaction *ka, if (copy_siginfo_to_user(&rt_sf->info, info) || __put_user(0, &rt_sf->uc.uc_flags) || __put_user(0, &rt_sf->uc.uc_link) - || __put_user(current->sas_ss_sp, &rt_sf->uc.uc_stack.ss_sp) - || __put_user(sas_ss_flags(regs->gpr[1]), - &rt_sf->uc.uc_stack.ss_flags) - || __put_user(current->sas_ss_size, &rt_sf->uc.uc_stack.ss_size) + || __save_altstack(&rt_sf->uc.uc_stack, regs->gpr[1]) || __put_user(to_user_ptr(&rt_sf->uc.uc_mcontext), &rt_sf->uc.uc_regs) || put_sigset_t(&rt_sf->uc.uc_sigmask, oldset)) @@ -1038,14 +988,11 @@ long sys_rt_sigreturn(int r3, int r4, int r5, int r6, int r7, int r8, * change it. -- paulus */ #ifdef CONFIG_PPC64 - /* - * We use the compat_sys_ version that does the 32/64 bits conversion - * and takes userland pointer directly. What about error checking ? - * nobody does any... - */ - compat_sys_sigaltstack((u32)(u64)&rt_sf->uc.uc_stack, 0, 0, 0, 0, 0, regs); + if (compat_restore_altstack(&rt_sf->uc.uc_stack)) + goto bad; #else - do_sigaltstack(&rt_sf->uc.uc_stack, NULL, regs->gpr[1]); + if (restore_altstack(&rt_sf->uc.uc_stack)) + goto bad; #endif set_thread_flag(TIF_RESTOREALL); return 0; @@ -1161,7 +1108,7 @@ int sys_debug_setcontext(struct ucontext __user *ctx, * always done it up until now so it is probably better not to * change it. -- paulus */ - do_sigaltstack(&ctx->uc_stack, NULL, regs->gpr[1]); + restore_altstack(&ctx->uc_stack); set_thread_flag(TIF_RESTOREALL); out: diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c index 1ca045d44324..807b5b1535e9 100644 --- a/arch/powerpc/kernel/signal_64.c +++ b/arch/powerpc/kernel/signal_64.c @@ -368,10 +368,8 @@ int sys_rt_sigreturn(unsigned long r3, unsigned long r4, unsigned long r5, if (restore_sigcontext(regs, NULL, 1, &uc->uc_mcontext)) goto badframe; - /* do_sigaltstack expects a __user pointer and won't modify - * what's in there anyway - */ - do_sigaltstack(&uc->uc_stack, NULL, regs->gpr[1]); + if (restore_altstack(&uc->uc_stack)) + goto badframe; set_thread_flag(TIF_RESTOREALL); return 0; @@ -416,10 +414,7 @@ int handle_rt_signal64(int signr, struct k_sigaction *ka, siginfo_t *info, /* Create the ucontext. */ err |= __put_user(0, &frame->uc.uc_flags); err |= __put_user(0, &frame->uc.uc_link); - err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp); - err |= __put_user(sas_ss_flags(regs->gpr[1]), - &frame->uc.uc_stack.ss_flags); - err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size); + err |= __save_altstack(&frame->uc.uc_stack, regs->gpr[1]); err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, signr, NULL, (unsigned long)ka->sa.sa_handler, 1); err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set)); |