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| author | Max Filippov <jcmvbkbc@gmail.com> | 2013-04-15 09:20:48 +0400 |
|---|---|---|
| committer | Chris Zankel <chris@zankel.net> | 2013-05-09 01:07:10 -0700 |
| commit | 3e4196a5cc9cff50900f3dc8acc3d41e5963fd50 (patch) | |
| tree | 149403b0517e402fbf29ce9aac65a49d1119234e /arch/xtensa/include | |
| parent | 4e96274e2b7a7463de6849c0411d876182ee8889 (diff) | |
| download | linux-3e4196a5cc9cff50900f3dc8acc3d41e5963fd50.tar.bz2 | |
xtensa: add stacktrace support
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
Diffstat (limited to 'arch/xtensa/include')
| -rw-r--r-- | arch/xtensa/include/asm/stacktrace.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/stacktrace.h b/arch/xtensa/include/asm/stacktrace.h new file mode 100644 index 000000000000..6a05fcb0a20d --- /dev/null +++ b/arch/xtensa/include/asm/stacktrace.h @@ -0,0 +1,36 @@ +/* + * arch/xtensa/include/asm/stacktrace.h + * + * 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. + * + * Copyright (C) 2001 - 2013 Tensilica Inc. + */ +#ifndef _XTENSA_STACKTRACE_H +#define _XTENSA_STACKTRACE_H + +#include <linux/sched.h> + +struct stackframe { + unsigned long pc; + unsigned long sp; +}; + +static __always_inline unsigned long *stack_pointer(struct task_struct *task) +{ + unsigned long *sp; + + if (!task || task == current) + __asm__ __volatile__ ("mov %0, a1\n" : "=a"(sp)); + else + sp = (unsigned long *)task->thread.sp; + + return sp; +} + +void walk_stackframe(unsigned long *sp, + int (*fn)(struct stackframe *frame, void *data), + void *data); + +#endif /* _XTENSA_STACKTRACE_H */ |