x86: i386-show-unhandled-signals-v3

[deliverable/linux.git] / arch / i386 / mm / fault.c

diff --git a/arch/i386/mm/fault.c b/arch/i386/mm/fault.c
index e92a10124935c006a22a55775b0aee755b2b08c3..01ffdd4964f08e9bec86c5ae759da9f5cbe8270a 100644 (file)
--- a/arch/i386/mm/fault.c
+++ b/arch/i386/mm/fault.c
@@ -283,6 +283,8 @@ static inline int vmalloc_fault(unsigned long address)
        return 0;
 }
 
+int show_unhandled_signals = 1;
+
 /*
  * This routine handles page faults.  It determines the address,
  * and the problem, and then passes it off to one of the appropriate
@@ -469,6 +471,14 @@ bad_area_nosemaphore:
                if (is_prefetch(regs, address, error_code))
                        return;
 
+               if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
+                   printk_ratelimit()) {
+                       printk("%s%s[%d]: segfault at %08lx eip %08lx "
+                           "esp %08lx error %lx\n",
+                           tsk->pid > 1 ? KERN_INFO : KERN_EMERG,
+                           tsk->comm, tsk->pid, address, regs->eip,
+                           regs->esp, error_code);
+               }
                tsk->thread.cr2 = address;
                /* Kernel addresses are always protection faults */
                tsk->thread.error_code = error_code | (address >= TASK_SIZE);