diff options
author | Rusty Russell <rusty@rustcorp.com.au> | 2008-12-31 12:35:57 (GMT) |
---|---|---|
committer | Rusty Russell <rusty@rustcorp.com.au> | 2008-12-31 12:35:57 (GMT) |
commit | 2ca1a615835d9f4990f42102ab1f2ef434e7e89c (patch) | |
tree | 726cf3d5f29a6c66c44e4bd68e7ebed2fd83d059 /arch/sparc/kernel/stacktrace.c | |
parent | e12f0102ac81d660c9f801d0a0e10ccf4537a9de (diff) | |
parent | 6a94cb73064c952255336cc57731904174b2c58f (diff) | |
download | linux-fsl-qoriq-2ca1a615835d9f4990f42102ab1f2ef434e7e89c.tar.xz |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
arch/x86/kernel/io_apic.c
Diffstat (limited to 'arch/sparc/kernel/stacktrace.c')
-rw-r--r-- | arch/sparc/kernel/stacktrace.c | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/arch/sparc/kernel/stacktrace.c b/arch/sparc/kernel/stacktrace.c new file mode 100644 index 0000000..acb12f6 --- /dev/null +++ b/arch/sparc/kernel/stacktrace.c @@ -0,0 +1,64 @@ +#include <linux/sched.h> +#include <linux/stacktrace.h> +#include <linux/thread_info.h> +#include <linux/module.h> +#include <asm/ptrace.h> +#include <asm/stacktrace.h> + +#include "kstack.h" + +static void __save_stack_trace(struct thread_info *tp, + struct stack_trace *trace, + bool skip_sched) +{ + unsigned long ksp, fp; + + if (tp == current_thread_info()) { + stack_trace_flush(); + __asm__ __volatile__("mov %%fp, %0" : "=r" (ksp)); + } else { + ksp = tp->ksp; + } + + fp = ksp + STACK_BIAS; + do { + struct sparc_stackf *sf; + struct pt_regs *regs; + unsigned long pc; + + if (!kstack_valid(tp, fp)) + break; + + sf = (struct sparc_stackf *) fp; + regs = (struct pt_regs *) (sf + 1); + + if (kstack_is_trap_frame(tp, regs)) { + if (!(regs->tstate & TSTATE_PRIV)) + break; + pc = regs->tpc; + fp = regs->u_regs[UREG_I6] + STACK_BIAS; + } else { + pc = sf->callers_pc; + fp = (unsigned long)sf->fp + STACK_BIAS; + } + + if (trace->skip > 0) + trace->skip--; + else if (!skip_sched || !in_sched_functions(pc)) + trace->entries[trace->nr_entries++] = pc; + } while (trace->nr_entries < trace->max_entries); +} + +void save_stack_trace(struct stack_trace *trace) +{ + __save_stack_trace(current_thread_info(), trace, false); +} +EXPORT_SYMBOL_GPL(save_stack_trace); + +void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace) +{ + struct thread_info *tp = task_thread_info(tsk); + + __save_stack_trace(tp, trace, true); +} +EXPORT_SYMBOL_GPL(save_stack_trace_tsk); |