fad1c45c93
The old code had the IP and SP coming from the registers in the thread struct, which are completely wrong since those are the userspace registers. This fixes that by pulling the correct values from the jmp_buf in which the kernel state of each thread is stored. Signed-off-by: Allan Graves <allan.graves@oracle.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
82 lines
1.8 KiB
C
82 lines
1.8 KiB
C
/*
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* Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
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* Licensed under the GPL
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*/
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#include "linux/config.h"
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#include "linux/sched.h"
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#include "linux/kernel.h"
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#include "linux/module.h"
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#include "linux/kallsyms.h"
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#include "asm/page.h"
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#include "asm/processor.h"
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#include "sysrq.h"
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#include "user_util.h"
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/* Catch non-i386 SUBARCH's. */
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#if !defined(CONFIG_UML_X86) || defined(CONFIG_64BIT)
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void show_trace(struct task_struct *task, unsigned long * stack)
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{
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unsigned long addr;
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if (!stack) {
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stack = (unsigned long*) &stack;
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WARN_ON(1);
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}
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printk("Call Trace: \n");
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while (((long) stack & (THREAD_SIZE-1)) != 0) {
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addr = *stack;
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if (__kernel_text_address(addr)) {
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printk("%08lx: [<%08lx>]", (unsigned long) stack, addr);
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print_symbol(" %s", addr);
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printk("\n");
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}
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stack++;
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}
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printk("\n");
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}
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#endif
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/*
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* stack dumps generator - this is used by arch-independent code.
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* And this is identical to i386 currently.
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*/
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void dump_stack(void)
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{
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unsigned long stack;
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show_trace(current, &stack);
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}
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EXPORT_SYMBOL(dump_stack);
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/*Stolen from arch/i386/kernel/traps.c */
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static int kstack_depth_to_print = 24;
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/* This recently started being used in arch-independent code too, as in
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* kernel/sched.c.*/
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void show_stack(struct task_struct *task, unsigned long *esp)
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{
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unsigned long *stack;
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int i;
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if (esp == NULL) {
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if (task != current && task != NULL) {
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esp = (unsigned long *) KSTK_ESP(task);
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} else {
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esp = (unsigned long *) &esp;
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}
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}
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stack = esp;
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for(i = 0; i < kstack_depth_to_print; i++) {
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if (kstack_end(stack))
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break;
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if (i && ((i % 8) == 0))
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printk("\n ");
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printk("%08lx ", *stack++);
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}
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printk("Call Trace: \n");
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show_trace(task, esp);
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}
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