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| author | Keshavamurthy Anil S <anil.s.keshavamurthy@intel.com> | 2006-09-26 01:32:20 +0200 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2006-09-26 20:33:32 +0200 |
| commit | fd32cb3a9c9f9399421408e8734cd8a6d9d1a09f (patch) | |
| tree | d030d93f169bd9ff39019dacc8f5b3c5a828b079 /arch/ia64/kernel/kprobes.c | |
| parent | [IA64] kprobe opcode 16 bytes alignment on IA64 (diff) | |
| download | linux-fd32cb3a9c9f9399421408e8734cd8a6d9d1a09f.tar.xz linux-fd32cb3a9c9f9399421408e8734cd8a6d9d1a09f.zip | |
[IA64] kprobes: fixup the pagefault exception caused by probehandlers
If the user-specified kprobe handler causes the page fault when accessing
user space address, fixup this fault since do_page_fault() should not
continue as the kprobe handler are run with preemption disabled.
Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
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 | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/ia64/kernel/kprobes.c b/arch/ia64/kernel/kprobes.c index 320cb7a91c9d..169ec3a7156c 100644 --- a/arch/ia64/kernel/kprobes.c +++ b/arch/ia64/kernel/kprobes.c @@ -771,6 +771,12 @@ static int __kprobes kprobes_fault_handler(struct pt_regs *regs, int trapnr) */ if (cur->fault_handler && cur->fault_handler(cur, regs, trapnr)) return 1; + /* + * In case the user-specified fault handler returned + * zero, try to fix up. + */ + if (ia64_done_with_exception(regs)) + return 1; /* * Let ia64_do_page_fault() fix it. |