diff options
| author |   Atsushi Nemoto <anemo@mba.ocn.ne.jp> | 2006-09-26 23:44:01 +0900 |
|---|---|---|
| committer |   Ralf Baechle <ralf@linux-mips.org> | 2006-10-01 23:16:57 +0100 |
| commit | 1df0f0ff7e56f6dcb1351b9490d55ebf91ff4bd8 (patch) | |
| tree | f309b9cf0293c973683b4fa3fab5bbb74e415d47 /include/asm-mips | |
| parent | [MIPS] lockdep: fix TRACE_IRQFLAGS_SUPPORT (diff) | |
| download | linux-dev-1df0f0ff7e56f6dcb1351b9490d55ebf91ff4bd8.tar.xz linux-dev-1df0f0ff7e56f6dcb1351b9490d55ebf91ff4bd8.zip | |
[MIPS] lockdep: Add STACKTRACE_SUPPORT and enable LOCKDEP_SUPPORT
Implement stacktrace interface by using unwind_stack() and enable lockdep
support in Kconfig.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'include/asm-mips')
| -rw-r--r-- | include/asm-mips/stacktrace.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/include/asm-mips/stacktrace.h b/include/asm-mips/stacktrace.h new file mode 100644 index 000000000000..231f6f897a61 --- /dev/null +++ b/include/asm-mips/stacktrace.h @@ -0,0 +1,44 @@ +#ifndef _ASM_STACKTRACE_H +#define _ASM_STACKTRACE_H + +#include <asm/ptrace.h> + +#ifdef CONFIG_KALLSYMS +extern int raw_show_trace; +extern unsigned long unwind_stack(struct task_struct *task, unsigned long *sp, + unsigned long pc, unsigned long ra); +#else +#define raw_show_trace 1 +#define unwind_stack(task, sp, pc, ra) 0 +#endif + +static __always_inline void prepare_frametrace(struct pt_regs *regs) +{ +#ifndef CONFIG_KALLSYMS + /* + * Remove any garbage that may be in regs (specially func + * addresses) to avoid show_raw_backtrace() to report them + */ + memset(regs, 0, sizeof(*regs)); +#endif + __asm__ __volatile__( + ".set push\n\t" + ".set noat\n\t" +#ifdef CONFIG_64BIT + "1: dla $1, 1b\n\t" + "sd $1, %0\n\t" + "sd $29, %1\n\t" + "sd $31, %2\n\t" +#else + "1: la $1, 1b\n\t" + "sw $1, %0\n\t" + "sw $29, %1\n\t" + "sw $31, %2\n\t" +#endif + ".set pop\n\t" + : "=m" (regs->cp0_epc), + "=m" (regs->regs[29]), "=m" (regs->regs[31]) + : : "memory"); +} + +#endif /* _ASM_STACKTRACE_H */ |