diff options
| author |   Daniel Kalmar <kalmard@homejinni.com> | 2011-05-13 08:38:04 -0400 |
|---|---|---|
| committer |   Robert Richter <robert.richter@amd.com> | 2011-06-15 14:35:33 +0200 |
| commit | 94ea09c6a8e6c5ffb59bb1d5ca10008d37544e1a (patch) | |
| tree | 86fd0e4241cfaa9a3d44ce6da39e54a291684143 /arch/mips | |
| parent | Linux 3.0-rc3 (diff) | |
| download | linux-dev-94ea09c6a8e6c5ffb59bb1d5ca10008d37544e1a.tar.xz linux-dev-94ea09c6a8e6c5ffb59bb1d5ca10008d37544e1a.zip | |
MIPS: Add new unwind_stack variant
The unwind_stack_by_address variant supports unwinding based
on any kernel code address.
This symbol is also exported so it can be called from modules.
Signed-off-by: Daniel Kalmar <kalmard@homejinni.com>
Signed-off-by: Gergely Kis <gergely@homejinni.com>
Signed-off-by: Robert Richter <robert.richter@amd.com>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/include/asm/stacktrace.h | 4 | ||||
| -rw-r--r-- | arch/mips/kernel/process.c | 19 |
2 files changed, 18 insertions, 5 deletions
diff --git a/arch/mips/include/asm/stacktrace.h b/arch/mips/include/asm/stacktrace.h index 0bf82818aa53..780ee2c2a2ac 100644 --- a/arch/mips/include/asm/stacktrace.h +++ b/arch/mips/include/asm/stacktrace.h @@ -7,6 +7,10 @@ extern int raw_show_trace; extern unsigned long unwind_stack(struct task_struct *task, unsigned long *sp, unsigned long pc, unsigned long *ra); +extern unsigned long unwind_stack_by_address(unsigned long stack_page, + unsigned long *sp, + unsigned long pc, + unsigned long *ra); #else #define raw_show_trace 1 static inline unsigned long unwind_stack(struct task_struct *task, diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c index d2112d3cf115..c28fbe6107bc 100644 --- a/arch/mips/kernel/process.c +++ b/arch/mips/kernel/process.c @@ -373,18 +373,18 @@ unsigned long thread_saved_pc(struct task_struct *tsk) #ifdef CONFIG_KALLSYMS -/* used by show_backtrace() */ -unsigned long unwind_stack(struct task_struct *task, unsigned long *sp, - unsigned long pc, unsigned long *ra) +/* generic stack unwinding function */ +unsigned long notrace unwind_stack_by_address(unsigned long stack_page, + unsigned long *sp, + unsigned long pc, + unsigned long *ra) { - unsigned long stack_page; struct mips_frame_info info; unsigned long size, ofs; int leaf; extern void ret_from_irq(void); extern void ret_from_exception(void); - stack_page = (unsigned long)task_stack_page(task); if (!stack_page) return 0; @@ -443,6 +443,15 @@ unsigned long unwind_stack(struct task_struct *task, unsigned long *sp, *ra = 0; return __kernel_text_address(pc) ? pc : 0; } +EXPORT_SYMBOL(unwind_stack_by_address); + +/* used by show_backtrace() */ +unsigned long unwind_stack(struct task_struct *task, unsigned long *sp, + unsigned long pc, unsigned long *ra) +{ + unsigned long stack_page = (unsigned long)task_stack_page(task); + return unwind_stack_by_address(stack_page, sp, pc, ra); +} #endif /* |