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| author | Steven J. Magnani <steve@digidescorp.com> | 2010-04-27 19:37:54 +0200 |
|---|---|---|
| committer | Michal Simek <monstr@monstr.eu> | 2010-08-04 10:22:35 +0200 |
| commit | ce3266c047389443d5f433d605c769e878cbe46e (patch) | |
| tree | e638a255d5d0f1b000a81b512dc605b92d0b8701 /arch/microblaze/include/asm/exceptions.h | |
| parent | microblaze: Allow PAGE_SIZE configuration (diff) | |
| download | linux-ce3266c047389443d5f433d605c769e878cbe46e.tar.xz linux-ce3266c047389443d5f433d605c769e878cbe46e.zip | |
microblaze: Add stack unwinder
Implement intelligent backtracing by searching for stack frame creation,
and emitting only return addresses. Use print_hex_dump() to display the
entire binary kernel stack.
Limitation: MMU kernels are not currently able to trace beyond a system trap
(interrupt, syscall, etc.). It is the intent of this patch to provide
infrastructure that can be extended to add this capability later.
Changes from V1:
* Removed checks in find_frame_creation() that prevented location of the frame
creation instruction in heavily optimized code
* Various formatting/commenting/file location tweaks per review comments
* Dropped Kconfig option to enable STACKTRACE as something logically separate
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Diffstat (limited to 'arch/microblaze/include/asm/exceptions.h')
| -rw-r--r-- | arch/microblaze/include/asm/exceptions.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/microblaze/include/asm/exceptions.h b/arch/microblaze/include/asm/exceptions.h index 4c7b5d037c88..fa0e36657fdd 100644 --- a/arch/microblaze/include/asm/exceptions.h +++ b/arch/microblaze/include/asm/exceptions.h @@ -14,6 +14,11 @@ #define _ASM_MICROBLAZE_EXCEPTIONS_H #ifdef __KERNEL__ + +#ifndef CONFIG_MMU +#define EX_HANDLER_STACK_SIZ (4*19) +#endif + #ifndef __ASSEMBLY__ /* Macros to enable and disable HW exceptions in the MSR */ |