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Diffstat (limited to 'arch/x86/kernel/traps_32.c')
-rw-r--r--arch/x86/kernel/traps_32.c39
1 files changed, 17 insertions, 22 deletions
diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
index 959d40edecd..6f3bb287c70 100644
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps_32.c
@@ -120,15 +120,6 @@ static inline unsigned long print_context_stack(struct thread_info *tinfo,
{
struct stack_frame *frame = (struct stack_frame *)bp;
- /*
- * if EBP is "deeper" into the stack than the actual stack pointer,
- * we need to rewind the stack pointer a little to start at the
- * first stack frame, but only if EBP is in this stack frame.
- */
- if (stack > (unsigned long *) bp
- && valid_stack_ptr(tinfo, frame, sizeof(*frame)))
- stack = (unsigned long *) bp;
-
while (valid_stack_ptr(tinfo, stack, sizeof(*stack))) {
unsigned long addr;
@@ -139,7 +130,7 @@ static inline unsigned long print_context_stack(struct thread_info *tinfo,
frame = frame->next_frame;
bp = (unsigned long) frame;
} else {
- ops->address(data, addr, 0);
+ ops->address(data, addr, bp == 0);
}
}
stack++;
@@ -150,11 +141,9 @@ static inline unsigned long print_context_stack(struct thread_info *tinfo,
#define MSG(msg) ops->warning(data, msg)
void dump_trace(struct task_struct *task, struct pt_regs *regs,
- unsigned long *stack,
+ unsigned long *stack, unsigned long bp,
const struct stacktrace_ops *ops, void *data)
{
- unsigned long bp = 0;
-
if (!task)
task = current;
@@ -234,20 +223,20 @@ static const struct stacktrace_ops print_trace_ops = {
static void
show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
- unsigned long * stack, char *log_lvl)
+ unsigned long *stack, unsigned long bp, char *log_lvl)
{
- dump_trace(task, regs, stack, &print_trace_ops, log_lvl);
+ dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
printk("%s =======================\n", log_lvl);
}
void show_trace(struct task_struct *task, struct pt_regs *regs,
- unsigned long * stack)
+ unsigned long *stack, unsigned long bp)
{
- show_trace_log_lvl(task, regs, stack, "");
+ show_trace_log_lvl(task, regs, stack, bp, "");
}
static void show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
- unsigned long *sp, char *log_lvl)
+ unsigned long *sp, unsigned long bp, char *log_lvl)
{
unsigned long *stack;
int i;
@@ -268,13 +257,13 @@ static void show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
printk("%08lx ", *stack++);
}
printk("\n%sCall Trace:\n", log_lvl);
- show_trace_log_lvl(task, regs, sp, log_lvl);
+ show_trace_log_lvl(task, regs, sp, bp, log_lvl);
}
void show_stack(struct task_struct *task, unsigned long *sp)
{
printk(" ");
- show_stack_log_lvl(task, NULL, sp, "");
+ show_stack_log_lvl(task, NULL, sp, 0, "");
}
/*
@@ -283,13 +272,19 @@ void show_stack(struct task_struct *task, unsigned long *sp)
void dump_stack(void)
{
unsigned long stack;
+ unsigned long bp = 0;
+
+#ifdef CONFIG_FRAME_POINTER
+ if (!bp)
+ asm("movl %%ebp, %0" : "=r" (bp):);
+#endif
printk("Pid: %d, comm: %.20s %s %s %.*s\n",
current->pid, current->comm, print_tainted(),
init_utsname()->release,
(int)strcspn(init_utsname()->version, " "),
init_utsname()->version);
- show_trace(current, NULL, &stack);
+ show_trace(current, NULL, &stack, bp);
}
EXPORT_SYMBOL(dump_stack);
@@ -314,7 +309,7 @@ void show_registers(struct pt_regs *regs)
unsigned char c;
printk("\n" KERN_EMERG "Stack: ");
- show_stack_log_lvl(NULL, regs, &regs->sp, KERN_EMERG);
+ show_stack_log_lvl(NULL, regs, &regs->sp, 0, KERN_EMERG);
printk(KERN_EMERG "Code: ");