From 03252919b79891063cf99145612360efbdf9500b Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Wed, 30 Jan 2008 13:33:18 +0100 Subject: x86: print which shared library/executable faulted in segfault etc. messages v3 They now look like: hal-resmgr[13791]: segfault at 3c rip 2b9c8caec182 rsp 7fff1e825d30 error 4 in libacl.so.1.1.0[2b9c8caea000+6000] This makes it easier to pinpoint bugs to specific libraries. And printing the offset into a mapping also always allows to find the correct fault point in a library even with randomized mappings. Previously there was no way to actually find the correct code address inside the randomized mapping. Relies on earlier patch to shorten the printk formats. They are often now longer than 80 characters, but I think that's worth it. [includes fix from Eric Dumazet to check d_path error value] Signed-off-by: Andi Kleen Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- arch/x86/kernel/signal_64.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'arch/x86/kernel/signal_64.c') diff --git a/arch/x86/kernel/signal_64.c b/arch/x86/kernel/signal_64.c index 4eb751c..7347bb1 100644 --- a/arch/x86/kernel/signal_64.c +++ b/arch/x86/kernel/signal_64.c @@ -484,9 +484,12 @@ do_notify_resume(struct pt_regs *regs, void *unused, __u32 thread_info_flags) void signal_fault(struct pt_regs *regs, void __user *frame, char *where) { struct task_struct *me = current; - if (show_unhandled_signals && printk_ratelimit()) - printk("%s[%d] bad frame in %s frame:%p ip:%lx sp:%lx orax:%lx\n", + if (show_unhandled_signals && printk_ratelimit()) { + printk("%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("\n"); + } force_sig(SIGSEGV, me); } -- cgit v1.1