tree e638a255d5d0f1b000a81b512dc605b92d0b8701
parent ba9c4f88d747836bf35c3eee36aa18d2e164f493
author Steven J. Magnani <steve@digidescorp.com> 1272389874 -0500
committer Michal Simek <monstr@monstr.eu> 1280910155 +0200

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>