| commit | ce3266c047389443d5f433d605c769e878cbe46e | |
| author | Steven J. Magnani <steve@digidescorp.com> | |
| Tue, 27 Apr 2010 17:37:54 +0000 (27 12:37 -0500) | ||
| committer | Michal Simek <monstr@monstr.eu> | |
| Wed, 4 Aug 2010 08:22:35 +0000 (4 10:22 +0200) | ||
| tree | e638a255d5d0f1b000a81b512dc605b92d0b8701 | treesnapshot (tar.gz zip) |
| parent | ba9c4f88d747836bf35c3eee36aa18d2e164f493 | commitdiff |
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>
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>