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| author | Keshavamurthy Anil S <anil.s.keshavamurthy@intel.com> | 2005-11-22 14:15:49 -0800 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2005-11-29 09:24:39 -0800 |
| commit | 5a94bcfd2a18edcf368b3128c7df07b58e529932 (patch) | |
| tree | 12e6240717e2dbdce0e157a097629b76d07afdae /arch/ia64/kernel/kprobes.c | |
| parent | b77dae5293efba42ea1ff04d410ee68e66d5b0cf (diff) | |
| download | linux-5a94bcfd2a18edcf368b3128c7df07b58e529932.tar.gz | |
[IA64] Remove getting break_num by decoding instruction
break.b always sets cr.iim to 0 and the current code tries to get the break_num by decoding instruction. However, their seems to be a race condition while reading the regs->cr_iip, as on other cpu the break.b at regs->cr_iip might have been replaced with the original instruction as a result of unregister_kprobe() and hence decoding instruction to obtain break_num will result in wrong value in this case. Also includes changes to kprobes.c which now has to handle break number zero. Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/kernel/kprobes.c')
| -rw-r--r-- | arch/ia64/kernel/kprobes.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/ia64/kernel/kprobes.c b/arch/ia64/kernel/kprobes.c index 801eeaeaf3de..2895d6e6062f 100644 --- a/arch/ia64/kernel/kprobes.c +++ b/arch/ia64/kernel/kprobes.c @@ -740,7 +740,7 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self, switch(val) { case DIE_BREAK: /* err is break number from ia64_bad_break() */ - if (args->err == 0x80200 || args->err == 0x80300) + if (args->err == 0x80200 || args->err == 0x80300 || args->err == 0) if (pre_kprobes_handler(args)) ret = NOTIFY_STOP; break; |