99 lines
2.4 KiB
C
99 lines
2.4 KiB
C
/*
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* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
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* Copyright (C) 2013 Richard Weinberger <richrd@nod.at>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kallsyms.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/sched.h>
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#include <asm/sysrq.h>
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#include <os.h>
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struct stack_frame {
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struct stack_frame *next_frame;
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unsigned long return_address;
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};
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static void do_stack_trace(unsigned long *sp, unsigned long bp)
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{
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int reliable;
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unsigned long addr;
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struct stack_frame *frame = (struct stack_frame *)bp;
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printk(KERN_INFO "Call Trace:\n");
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while (((long) sp & (THREAD_SIZE-1)) != 0) {
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addr = *sp;
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if (__kernel_text_address(addr)) {
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reliable = 0;
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if ((unsigned long) sp == bp + sizeof(long)) {
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frame = frame ? frame->next_frame : NULL;
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bp = (unsigned long)frame;
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reliable = 1;
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}
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printk(KERN_INFO " [<%08lx>]", addr);
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printk(KERN_CONT " %s", reliable ? "" : "? ");
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print_symbol(KERN_CONT "%s", addr);
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printk(KERN_CONT "\n");
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}
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sp++;
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}
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printk(KERN_INFO "\n");
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}
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static unsigned long get_frame_pointer(struct task_struct *task,
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struct pt_regs *segv_regs)
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{
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if (!task || task == current)
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return segv_regs ? PT_REGS_BP(segv_regs) : current_bp();
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else
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return KSTK_EBP(task);
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}
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static unsigned long *get_stack_pointer(struct task_struct *task,
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struct pt_regs *segv_regs)
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{
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if (!task || task == current)
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return segv_regs ? (unsigned long *)PT_REGS_SP(segv_regs) : current_sp();
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else
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return (unsigned long *)KSTK_ESP(task);
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}
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void show_stack(struct task_struct *task, unsigned long *stack)
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{
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unsigned long *sp = stack, bp = 0;
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struct pt_regs *segv_regs = current->thread.segv_regs;
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int i;
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if (!segv_regs && os_is_signal_stack()) {
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printk(KERN_ERR "Received SIGSEGV in SIGSEGV handler,"
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" aborting stack trace!\n");
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return;
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}
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#ifdef CONFIG_FRAME_POINTER
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bp = get_frame_pointer(task, segv_regs);
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#endif
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if (!stack)
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sp = get_stack_pointer(task, segv_regs);
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printk(KERN_INFO "Stack:\n");
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stack = sp;
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for (i = 0; i < 3 * STACKSLOTS_PER_LINE; i++) {
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if (kstack_end(stack))
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break;
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if (i && ((i % STACKSLOTS_PER_LINE) == 0))
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printk(KERN_CONT "\n");
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printk(KERN_CONT " %08lx", *stack++);
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}
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printk(KERN_CONT "\n");
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do_stack_trace(sp, bp);
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}
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