diff options
Diffstat (limited to 'arch/m68k/kernel/signal.c')
| -rw-r--r-- | arch/m68k/kernel/signal.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/arch/m68k/kernel/signal.c b/arch/m68k/kernel/signal.c index b9f6908a31bc..e628b859ef21 100644 --- a/arch/m68k/kernel/signal.c +++ b/arch/m68k/kernel/signal.c @@ -51,6 +51,8 @@ #include <asm/ucontext.h> #include <asm/cacheflush.h> +#include "signal.h" + #ifdef CONFIG_MMU /* @@ -858,11 +860,17 @@ static inline int rt_setup_ucontext(struct ucontext __user *uc, struct pt_regs * } static inline void __user * -get_sigframe(struct ksignal *ksig, size_t frame_size) +get_sigframe(struct ksignal *ksig, struct pt_regs *tregs, size_t frame_size) { unsigned long usp = sigsp(rdusp(), ksig); + unsigned long gap = 0; + + if (CPU_IS_020_OR_030 && tregs->format == 0xb) { + /* USP is unreliable so use worst-case value */ + gap = 256; + } - return (void __user *)((usp - frame_size) & -8UL); + return (void __user *)((usp - gap - frame_size) & -8UL); } static int setup_frame(struct ksignal *ksig, sigset_t *set, @@ -880,7 +888,7 @@ static int setup_frame(struct ksignal *ksig, sigset_t *set, return -EFAULT; } - frame = get_sigframe(ksig, sizeof(*frame) + fsize); + frame = get_sigframe(ksig, tregs, sizeof(*frame) + fsize); if (fsize) err |= copy_to_user (frame + 1, regs + 1, fsize); @@ -952,7 +960,7 @@ static int setup_rt_frame(struct ksignal *ksig, sigset_t *set, return -EFAULT; } - frame = get_sigframe(ksig, sizeof(*frame)); + frame = get_sigframe(ksig, tregs, sizeof(*frame)); if (fsize) err |= copy_to_user (&frame->uc.uc_extra, regs + 1, fsize); @@ -1103,7 +1111,7 @@ static void do_signal(struct pt_regs *regs) restore_saved_sigmask(); } -void do_notify_resume(struct pt_regs *regs) +asmlinkage void do_notify_resume(struct pt_regs *regs) { if (test_thread_flag(TIF_NOTIFY_SIGNAL) || test_thread_flag(TIF_SIGPENDING)) |