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| author |   Murilo Opsfelder Araujo <muriloo@linux.ibm.com> | 2018-08-01 18:33:20 -0300 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2018-08-08 00:32:30 +1000 |
| commit | a99b9c5ed43ecfff5c47c558cc0fcbf8c6503f4c (patch) | |
| tree | 73603c2fa512799f8ef2e5694e8f601a461e2695 /arch/powerpc/kernel | |
| parent | powerpc: Add show_user_instructions() (diff) | |
| download | linux-dev-a99b9c5ed43ecfff5c47c558cc0fcbf8c6503f4c.tar.xz linux-dev-a99b9c5ed43ecfff5c47c558cc0fcbf8c6503f4c.zip | |
powerpc/traps: Show instructions on exceptions
Call show_user_instructions() in arch/powerpc/kernel/traps.c to dump
instructions at faulty location, useful to debugging.
Before this patch, an unhandled signal message looked like:
pandafault[10524]: segfault (11) at 100007d0 nip 1000061c lr 7fffbd295100 code 2 in pandafault[10000000+10000]
After this patch, it looks like:
pandafault[10524]: segfault (11) at 100007d0 nip 1000061c lr 7fffbd295100 code 2 in pandafault[10000000+10000]
pandafault[10524]: code: 4bfffeec 4bfffee8 3c401002 38427f00 fbe1fff8 f821ffc1 7c3f0b78 3d22fffe
pandafault[10524]: code: 392988d0 f93f0020 e93f0020 39400048 <99490000> 39200000 7d234b78 383f0040
Signed-off-by: Murilo Opsfelder Araujo <muriloo@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/traps.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 171c504d78fb..070e96f1773a 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -70,6 +70,7 @@ #include <asm/hmi.h> #include <sysdev/fsl_pci.h> #include <asm/kprobes.h> +#include <asm/stacktrace.h> #if defined(CONFIG_DEBUGGER) || defined(CONFIG_KEXEC_CORE) int (*__debugger)(struct pt_regs *regs) __read_mostly; @@ -337,6 +338,8 @@ static void show_signal_msg(int signr, struct pt_regs *regs, int code, print_vma_addr(KERN_CONT " in ", regs->nip); pr_cont("\n"); + + show_user_instructions(regs); } void _exception_pkey(int signr, struct pt_regs *regs, int code, |