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x86_32: signal: introduce signal_fault()

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implement signal_fault() for 32bit.

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Hiroshi Shimamoto 2008-09-05 16:27:11 -07:00 committed by Ingo Molnar
parent bb57925f50
commit 72fa50f4ef
2 changed files with 19 additions and 3 deletions
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18
arch/x86/kernel/signal_32.c
View File

@ -243,7 +243,7 @@ asmlinkage int sys_rt_sigreturn(unsigned long __unused)
return ax;
badframe:
force_sig(SIGSEGV, current);
signal_fault(regs, frame, "rt sigreturn");
return 0;
}
@ -669,3 +669,19 @@ do_notify_resume(struct pt_regs *regs, void *unused, __u32 thread_info_flags)
clear_thread_flag(TIF_IRET);
}
void signal_fault(struct pt_regs *regs, void __user *frame, char *where)
{
struct task_struct *me = current;
if (show_unhandled_signals && printk_ratelimit()) {
printk(KERN_INFO
"%s[%d] bad frame in %s frame:%p ip:%lx sp:%lx orax:%lx",
me->comm, me->pid, where, frame,
regs->ip, regs->sp, regs->orig_ax);
print_vma_addr(" in ", regs->ip);
printk(KERN_CONT "\n");
}
force_sig(SIGSEGV, me);
}

4
include/asm-x86/ptrace.h
View File

@ -144,10 +144,10 @@ convert_ip_to_linear(struct task_struct *child, struct pt_regs *regs);
#ifdef CONFIG_X86_32
extern void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs,
int error_code);
#else
void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
#endif
void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
extern long syscall_trace_enter(struct pt_regs *);
extern void syscall_trace_leave(struct pt_regs *);