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| author | David Woodhouse <David.Woodhouse@intel.com> | 2009-06-08 13:21:27 +0200 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2009-06-08 13:21:27 +0200 |
| commit | e635a01ea0a16cf7cd31ecd2305870385dca9be6 (patch) | |
| tree | c7153e7dee5caf6ac90d85694ff27e4d0b606290 /arch/xtensa/kernel/traps.c | |
| parent | mtd: physmap_of: Add multiple regions and concatenation support (diff) | |
| parent | [MTD] [NAND] S3C2410: Use DIV_ROUND_UP (diff) | |
| download | linux-e635a01ea0a16cf7cd31ecd2305870385dca9be6.tar.xz linux-e635a01ea0a16cf7cd31ecd2305870385dca9be6.zip | |
Merge branch 'next-mtd' of git://aeryn.fluff.org.uk/bjdooks/linux
Diffstat (limited to 'arch/xtensa/kernel/traps.c')
| -rw-r--r-- | arch/xtensa/kernel/traps.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/arch/xtensa/kernel/traps.c b/arch/xtensa/kernel/traps.c index 9f0b71189e94..ba9ab9349782 100644 --- a/arch/xtensa/kernel/traps.c +++ b/arch/xtensa/kernel/traps.c @@ -369,6 +369,18 @@ void show_regs(struct pt_regs * regs) regs->syscall); } +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 show_trace(struct task_struct *task, unsigned long *sp) { unsigned long a0, a1, pc; @@ -377,7 +389,7 @@ void show_trace(struct task_struct *task, unsigned long *sp) if (sp) a1 = (unsigned long)sp; else - a1 = task->thread.sp; + a1 = (unsigned long)stack_pointer(task); sp_start = a1 & ~(THREAD_SIZE-1); sp_end = sp_start + THREAD_SIZE; @@ -420,7 +432,7 @@ void show_stack(struct task_struct *task, unsigned long *sp) unsigned long *stack; if (!sp) - sp = (unsigned long *)task->thread.sp; + sp = stack_pointer(task); stack = sp; printk("\nStack: "); |