[PATCH 5/7] powerpc/traps: Print VMA for unhandled signals

Murilo Opsfelder Araujo
2018-07-24T19:28:19Z

This adds VMA address in the message printed for unhandled signals, similarly to
what other architectures, like x86, print.

Before this patch, a page fault looked like:

Jul 11 15:56:25 localhost kernel: pandafault[61470]: unhandled signal 11 at 00000000100007d0 nip 000000001000061c lr 00007fff8d185100 code 2

After this patch, a page fault looks like:

Jul 11 16:04:11 localhost kernel: pandafault[6303]: unhandled signal 11 at 00000000100007d0 nip 000000001000061c lr 00007fff93c55100 code 2 in pandafault[10000000+10000]

Signed-off-by: Murilo Opsfelder Araujo <muriloo@linux.ibm.com>
---
arch/powerpc/kernel/traps.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 047d980ac776..e6c43ef9fb50 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -315,9 +315,13 @@ static void show_signal_msg(int signr, struct pt_regs *regs, int code,
return;

pr_info("%s[%d]: unhandled signal %d at "REG_FMT \
- " nip "REG_FMT" lr "REG_FMT" code %x\n",
+ " nip "REG_FMT" lr "REG_FMT" code %x",
current->comm, current->pid, signr, addr,
regs->nip, regs->link, code);
+
+ print_vma_addr(KERN_CONT " in ", regs->nip);
+
+ pr_cont("\n");
}

void _exception_pkey(int signr, struct pt_regs *regs, int code,
--
2.17.1