diff options
| author | Ananth N Mavinakayanahalli <ananth@in.ibm.com> | 2012-08-23 21:27:09 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2012-09-05 15:19:36 +1000 |
| commit | 41ab5266c3622354353433618edb92ab278025fa (patch) | |
| tree | 5e1313a104ae877a174a88a2c93eb010f1bd5861 /arch/powerpc/kernel | |
| parent | 7118e7e648e0a902bf4f38c55a25fcff730f33d7 (diff) | |
powerpc: Add trap_nr to thread_struct
Add thread_struct.trap_nr and use it to store the last exception
the thread experienced. In this patch, we populate the field at
various places where we force_sig_info() to the process.
This is also used in uprobes to determine if the probed instruction
caused an exception.
Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/process.c | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/traps.c | 1 |
2 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 710f400476d..8e701a4ed36 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -258,6 +258,7 @@ void do_send_trap(struct pt_regs *regs, unsigned long address, { siginfo_t info; + current->thread.trap_nr = signal_code; if (notify_die(DIE_DABR_MATCH, "dabr_match", regs, error_code, 11, SIGSEGV) == NOTIFY_STOP) return; @@ -275,6 +276,7 @@ void do_dabr(struct pt_regs *regs, unsigned long address, { siginfo_t info; + current->thread.trap_nr = TRAP_HWBKPT; if (notify_die(DIE_DABR_MATCH, "dabr_match", regs, error_code, 11, SIGSEGV) == NOTIFY_STOP) return; diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 158972341a2..8831322962d 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -251,6 +251,7 @@ void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr) if (arch_irqs_disabled() && !arch_irq_disabled_regs(regs)) local_irq_enable(); + current->thread.trap_nr = code; memset(&info, 0, sizeof(info)); info.si_signo = signr; info.si_code = code; |