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| author | Murilo Opsfelder Araujo <muriloo@linux.ibm.com> | 2018-08-01 18:33:18 -0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-08-08 00:32:30 +1000 |
| commit | 0f642d616b8b15647ca34786877b298ff2970713 (patch) | |
| tree | 26fa3a00b3253a80cb23faed22fd59cb0a6e775b /arch/powerpc/kernel/traps.c | |
| parent | 49d8f2011dddac642a20491a698ad07059ed6096 (diff) | |
| download | linux-0f642d616b8b15647ca34786877b298ff2970713.tar.bz2 | |
powerpc/traps: Print VMA for unhandled signals
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:
pandafault[61470]: unhandled signal 11 at 100007d0 nip 1000061c lr 7fff8d185100 code 2
After this patch, a page fault looks like:
pandafault[6303]: segfault 11 at 100007d0 nip 1000061c lr 7fff93c55100 code 2 in pandafault[10000000+10000]
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/traps.c')
| -rw-r--r-- | arch/powerpc/kernel/traps.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index eb83cf6b5cb2..171c504d78fb 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -96,6 +96,19 @@ EXPORT_SYMBOL(__debugger_fault_handler); #define TM_DEBUG(x...) do { } while(0) #endif +static const char *signame(int signr) +{ + switch (signr) { + case SIGBUS: return "bus error"; + case SIGFPE: return "floating point exception"; + case SIGILL: return "illegal instruction"; + case SIGSEGV: return "segfault"; + case SIGTRAP: return "unhandled trap"; + } + + return "unknown signal"; +} + /* * Trap & Exception support */ @@ -317,9 +330,13 @@ static void show_signal_msg(int signr, struct pt_regs *regs, int code, if (!unhandled_signal(current, signr)) return; - pr_info("%s[%d]: unhandled signal %d at %lx nip %lx lr %lx code %x\n", - current->comm, current->pid, signr, + pr_info("%s[%d]: %s (%d) at %lx nip %lx lr %lx code %x", + current->comm, current->pid, signame(signr), 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, |