diff options
Diffstat (limited to 'arch/mips/kernel/stacktrace.c')
| -rw-r--r-- | arch/mips/kernel/stacktrace.c | 26 |
1 files changed, 19 insertions, 7 deletions
diff --git a/arch/mips/kernel/stacktrace.c b/arch/mips/kernel/stacktrace.c index ebd9db8d1ec..1ba775d24d3 100644 --- a/arch/mips/kernel/stacktrace.c +++ b/arch/mips/kernel/stacktrace.c @@ -1,12 +1,11 @@ /* - * arch/mips/kernel/stacktrace.c - * * Stack trace management functions * * Copyright (C) 2006 Atsushi Nemoto <anemo@mba.ocn.ne.jp> */ #include <linux/sched.h> #include <linux/stacktrace.h> +#include <linux/export.h> #include <asm/stacktrace.h> /* @@ -31,7 +30,8 @@ static void save_raw_context_stack(struct stack_trace *trace, } } -static void save_context_stack(struct stack_trace *trace, struct pt_regs *regs) +static void save_context_stack(struct stack_trace *trace, + struct task_struct *tsk, struct pt_regs *regs) { unsigned long sp = regs->regs[29]; #ifdef CONFIG_KALLSYMS @@ -40,7 +40,7 @@ static void save_context_stack(struct stack_trace *trace, struct pt_regs *regs) if (raw_show_trace || !__kernel_text_address(pc)) { unsigned long stack_page = - (unsigned long)task_stack_page(current); + (unsigned long)task_stack_page(tsk); if (stack_page && sp >= stack_page && sp <= stack_page + THREAD_SIZE - 32) save_raw_context_stack(trace, sp); @@ -53,7 +53,7 @@ static void save_context_stack(struct stack_trace *trace, struct pt_regs *regs) trace->entries[trace->nr_entries++] = pc; if (trace->nr_entries >= trace->max_entries) break; - pc = unwind_stack(current, &sp, pc, &ra); + pc = unwind_stack(tsk, &sp, pc, &ra); } while (pc); #else save_raw_context_stack(trace, sp); @@ -65,11 +65,23 @@ static void save_context_stack(struct stack_trace *trace, struct pt_regs *regs) */ void save_stack_trace(struct stack_trace *trace) { + save_stack_trace_tsk(current, trace); +} +EXPORT_SYMBOL_GPL(save_stack_trace); + +void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace) +{ struct pt_regs dummyregs; struct pt_regs *regs = &dummyregs; WARN_ON(trace->nr_entries || !trace->max_entries); - prepare_frametrace(regs); - save_context_stack(trace, regs); + if (tsk != current) { + regs->regs[29] = tsk->thread.reg29; + regs->regs[31] = 0; + regs->cp0_epc = tsk->thread.reg31; + } else + prepare_frametrace(regs); + save_context_stack(trace, tsk, regs); } +EXPORT_SYMBOL_GPL(save_stack_trace_tsk); |