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authorOlof Johansson <olof@lixom.net>2007-10-12 10:20:07 +1000
committerPaul Mackerras <paulus@samba.org>2007-10-12 14:05:18 +1000
commitd0c3d534a4388a465101b634a95f2ec586415254 (patch)
treee6acdc89adcb9057b7bbaeba55332fdcb97c2ceb /arch/powerpc/kernel/signal_64.c
parentb63db45ca44a805ef21eb10a3750e88419156423 (diff)
[POWERPC] Implement logging of unhandled signals
Implement show_unhandled_signals sysctl + support to print when a process is killed due to unhandled signals just as i386 and x86_64 does. Default to having it off, unlike x86 that defaults on. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/kernel/signal_64.c')
-rw-r--r--arch/powerpc/kernel/signal_64.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c
index de895e6d8c6..faeb8f207ea 100644
--- a/arch/powerpc/kernel/signal_64.c
+++ b/arch/powerpc/kernel/signal_64.c
@@ -64,6 +64,11 @@ struct rt_sigframe {
char abigap[288];
} __attribute__ ((aligned (16)));
+static const char fmt32[] = KERN_INFO \
+ "%s[%d]: bad frame in %s: %08lx nip %08lx lr %08lx\n";
+static const char fmt64[] = KERN_INFO \
+ "%s[%d]: bad frame in %s: %016lx nip %016lx lr %016lx\n";
+
/*
* Set up the sigcontext for the signal frame.
*/
@@ -315,6 +320,11 @@ badframe:
printk("badframe in sys_rt_sigreturn, regs=%p uc=%p &uc->uc_mcontext=%p\n",
regs, uc, &uc->uc_mcontext);
#endif
+ if (show_unhandled_signals && printk_ratelimit())
+ printk(regs->msr & MSR_SF ? fmt64 : fmt32,
+ current->comm, current->pid, "rt_sigreturn",
+ (long)uc, regs->nip, regs->link);
+
force_sig(SIGSEGV, current);
return 0;
}
@@ -398,6 +408,11 @@ badframe:
printk("badframe in setup_rt_frame, regs=%p frame=%p newsp=%lx\n",
regs, frame, newsp);
#endif
+ if (show_unhandled_signals && printk_ratelimit())
+ printk(regs->msr & MSR_SF ? fmt64 : fmt32,
+ current->comm, current->pid, "setup_rt_frame",
+ (long)frame, regs->nip, regs->link);
+
force_sigsegv(signr, current);
return 0;
}