diff options
| author | K.Prasad <prasad@linux.vnet.ibm.com> | 2010-06-15 11:36:12 +0530 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2010-06-22 19:40:51 +1000 |
| commit | e3e94084adb5610987283367574ebc771e8206e1 (patch) | |
| tree | 2787caa5a5f657a218d199b7dff8c7dcd326eb7f /arch/powerpc/include/asm/hw_breakpoint.h | |
| parent | 06532a6743d83fac4b79389fc8c86c88cb4e3302 (diff) | |
powerpc, hw_breakpoint: Discard extraneous interrupt due to accesses outside symbol length
Many a times, the requested breakpoint length can be less than the
fixed breakpoint length i.e. 8 bytes supported by PowerPC 64-bit
server (Book III S) processors. This could lead to extraneous
interrupts resulting in false breakpoint notifications. This
detects and discards such interrupts for non-ptrace requests.
We don't change ptrace behaviour to avoid breaking compatability.
[Suggestion from Paul Mackerras <paulus@samba.org> to add a new flag in
'struct arch_hw_breakpoint' to identify extraneous interrupts]
Signed-off-by: K.Prasad <prasad@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/include/asm/hw_breakpoint.h')
| -rw-r--r-- | arch/powerpc/include/asm/hw_breakpoint.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/hw_breakpoint.h b/arch/powerpc/include/asm/hw_breakpoint.h index 6576bad1069c..ea87f8ae7bdb 100644 --- a/arch/powerpc/include/asm/hw_breakpoint.h +++ b/arch/powerpc/include/asm/hw_breakpoint.h @@ -27,6 +27,7 @@ #ifdef CONFIG_HAVE_HW_BREAKPOINT struct arch_hw_breakpoint { + bool extraneous_interrupt; u8 len; /* length of the target data symbol */ int type; unsigned long address; |