diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-05 15:33:27 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-05 15:33:27 -0800 |
| commit | 6ec22f9b037fc0c2e00ddb7023fad279c365324d (patch) | |
| tree | 4da7e3b3c0213317dd17c6535876171865e24315 /arch/x86/kernel/dumpstack_64.c | |
| parent | 83be7d764dc4b860712e392197ec27645f9d74a8 (diff) | |
| parent | 9b3660a55a9052518c91cc7c62d89e22f3f6f490 (diff) | |
Merge branch 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: Limit number of per cpu TSC sync messages
x86: dumpstack, 64-bit: Disable preemption when walking the IRQ/exception stacks
x86: dumpstack: Clean up the x86_stack_ids[][] initalization and other details
x86, cpu: mv display_cacheinfo -> cpu_detect_cache_sizes
x86: Suppress stack overrun message for init_task
x86: Fix cpu_devs[] initialization in early_cpu_init()
x86: Remove CPU cache size output for non-Intel too
x86: Minimise printk spew from per-vendor init code
x86: Remove the CPU cache size printk's
cpumask: Avoid cpumask_t in arch/x86/kernel/apic/nmi.c
x86: Make sure we also print a Code: line for show_regs()
Diffstat (limited to 'arch/x86/kernel/dumpstack_64.c')
| -rw-r--r-- | arch/x86/kernel/dumpstack_64.c | 46 |
1 files changed, 26 insertions, 20 deletions
diff --git a/arch/x86/kernel/dumpstack_64.c b/arch/x86/kernel/dumpstack_64.c index a071e6be177e..8e740934bd1f 100644 --- a/arch/x86/kernel/dumpstack_64.c +++ b/arch/x86/kernel/dumpstack_64.c @@ -10,26 +10,28 @@ #include <linux/module.h> #include <linux/ptrace.h> #include <linux/kexec.h> +#include <linux/sysfs.h> #include <linux/bug.h> #include <linux/nmi.h> -#include <linux/sysfs.h> #include <asm/stacktrace.h> #include "dumpstack.h" +#define N_EXCEPTION_STACKS_END \ + (N_EXCEPTION_STACKS + DEBUG_STKSZ/EXCEPTION_STKSZ - 2) static char x86_stack_ids[][8] = { - [DEBUG_STACK - 1] = "#DB", - [NMI_STACK - 1] = "NMI", - [DOUBLEFAULT_STACK - 1] = "#DF", - [STACKFAULT_STACK - 1] = "#SS", - [MCE_STACK - 1] = "#MC", + [ DEBUG_STACK-1 ] = "#DB", + [ NMI_STACK-1 ] = "NMI", + [ DOUBLEFAULT_STACK-1 ] = "#DF", + [ STACKFAULT_STACK-1 ] = "#SS", + [ MCE_STACK-1 ] = "#MC", #if DEBUG_STKSZ > EXCEPTION_STKSZ - [N_EXCEPTION_STACKS ... - N_EXCEPTION_STACKS + DEBUG_STKSZ / EXCEPTION_STKSZ - 2] = "#DB[?]" + [ N_EXCEPTION_STACKS ... + N_EXCEPTION_STACKS_END ] = "#DB[?]" #endif - }; +}; int x86_is_stack_id(int id, char *name) { @@ -37,7 +39,7 @@ int x86_is_stack_id(int id, char *name) } static unsigned long *in_exception_stack(unsigned cpu, unsigned long stack, - unsigned *usedp, char **idp) + unsigned *usedp, char **idp) { unsigned k; @@ -202,21 +204,24 @@ EXPORT_SYMBOL(dump_trace); void show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs, - unsigned long *sp, unsigned long bp, char *log_lvl) + unsigned long *sp, unsigned long bp, char *log_lvl) { + unsigned long *irq_stack_end; + unsigned long *irq_stack; unsigned long *stack; + int cpu; int i; - const int cpu = smp_processor_id(); - unsigned long *irq_stack_end = - (unsigned long *)(per_cpu(irq_stack_ptr, cpu)); - unsigned long *irq_stack = - (unsigned long *)(per_cpu(irq_stack_ptr, cpu) - IRQ_STACK_SIZE); + + preempt_disable(); + cpu = smp_processor_id(); + + irq_stack_end = (unsigned long *)(per_cpu(irq_stack_ptr, cpu)); + irq_stack = (unsigned long *)(per_cpu(irq_stack_ptr, cpu) - IRQ_STACK_SIZE); /* - * debugging aid: "show_stack(NULL, NULL);" prints the - * back trace for this cpu. + * Debugging aid: "show_stack(NULL, NULL);" prints the + * back trace for this cpu: */ - if (sp == NULL) { if (task) sp = (unsigned long *)task->thread.sp; @@ -240,6 +245,8 @@ show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs, printk(" %016lx", *stack++); touch_nmi_watchdog(); } + preempt_enable(); + printk("\n"); show_trace_log_lvl(task, regs, sp, bp, log_lvl); } @@ -303,4 +310,3 @@ int is_valid_bugaddr(unsigned long ip) return ud2 == 0x0b0f; } - |