diff options
| author | Steven J. Magnani <steve@digidescorp.com> | 2010-04-27 21:37:54 +0400 |
|---|---|---|
| committer | Michal Simek <monstr@monstr.eu> | 2010-08-04 12:22:35 +0400 |
| commit | ce3266c047389443d5f433d605c769e878cbe46e (patch) | |
| tree | e638a255d5d0f1b000a81b512dc605b92d0b8701 /arch/microblaze/include/asm/unwind.h | |
| parent | ba9c4f88d747836bf35c3eee36aa18d2e164f493 (diff) | |
| download | linux-ce3266c047389443d5f433d605c769e878cbe46e.tar.xz | |
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/unwind.h')
| -rw-r--r-- | arch/microblaze/include/asm/unwind.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/microblaze/include/asm/unwind.h b/arch/microblaze/include/asm/unwind.h new file mode 100644 index 000000000000..d248b7de4b13 --- /dev/null +++ b/arch/microblaze/include/asm/unwind.h @@ -0,0 +1,29 @@ +/* + * Backtrace support for Microblaze + * + * Copyright (C) 2010 Digital Design Corporation + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#ifndef __MICROBLAZE_UNWIND_H +#define __MICROBLAZE_UNWIND_H + +struct stack_trace; + +struct trap_handler_info { + unsigned long start_addr; + unsigned long end_addr; + const char *trap_name; +}; +extern struct trap_handler_info microblaze_trap_handlers; + +extern const char _hw_exception_handler; +extern const char ex_handler_unhandled; + +void microblaze_unwind(struct task_struct *task, struct stack_trace *trace); + +#endif /* __MICROBLAZE_UNWIND_H */ + |