Commit 72fa50f4 authored by Hiroshi Shimamoto's avatar Hiroshi Shimamoto Committed by Ingo Molnar
Browse files

x86_32: signal: introduce signal_fault() 



implement signal_fault() for 32bit.

Signed-off-by: default avatarHiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent bb57925f

arch/x86/kernel/signal_32.c

+17 −1
Original line number Diff line number Diff line
@@ -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);

}

include/asm-x86/ptrace.h

+2 −2
Original line number Diff line number Diff line
@@ -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 *);