![Richard Weinberger](/assets/img/avatar_default.png)
We cannot use print_stack_trace because the name conflicts with linux/stacktrace.h. Reported-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Richard Weinberger <richard@nod.at>
99 lines
2.4 KiB
C
99 lines
2.4 KiB
C
/*
|
|
* Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
|
|
* Copyright (C) 2013 Richard Weinberger <richrd@nod.at>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/kallsyms.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/sched.h>
|
|
#include <asm/sysrq.h>
|
|
#include <os.h>
|
|
|
|
struct stack_frame {
|
|
struct stack_frame *next_frame;
|
|
unsigned long return_address;
|
|
};
|
|
|
|
static void do_stack_trace(unsigned long *sp, unsigned long bp)
|
|
{
|
|
int reliable;
|
|
unsigned long addr;
|
|
struct stack_frame *frame = (struct stack_frame *)bp;
|
|
|
|
printk(KERN_INFO "Call Trace:\n");
|
|
while (((long) sp & (THREAD_SIZE-1)) != 0) {
|
|
addr = *sp;
|
|
if (__kernel_text_address(addr)) {
|
|
reliable = 0;
|
|
if ((unsigned long) sp == bp + sizeof(long)) {
|
|
frame = frame ? frame->next_frame : NULL;
|
|
bp = (unsigned long)frame;
|
|
reliable = 1;
|
|
}
|
|
|
|
printk(KERN_INFO " [<%08lx>]", addr);
|
|
printk(KERN_CONT " %s", reliable ? "" : "? ");
|
|
print_symbol(KERN_CONT "%s", addr);
|
|
printk(KERN_CONT "\n");
|
|
}
|
|
sp++;
|
|
}
|
|
printk(KERN_INFO "\n");
|
|
}
|
|
|
|
static unsigned long get_frame_pointer(struct task_struct *task,
|
|
struct pt_regs *segv_regs)
|
|
{
|
|
if (!task || task == current)
|
|
return segv_regs ? PT_REGS_BP(segv_regs) : current_bp();
|
|
else
|
|
return KSTK_EBP(task);
|
|
}
|
|
|
|
static unsigned long *get_stack_pointer(struct task_struct *task,
|
|
struct pt_regs *segv_regs)
|
|
{
|
|
if (!task || task == current)
|
|
return segv_regs ? (unsigned long *)PT_REGS_SP(segv_regs) : current_sp();
|
|
else
|
|
return (unsigned long *)KSTK_ESP(task);
|
|
}
|
|
|
|
void show_stack(struct task_struct *task, unsigned long *stack)
|
|
{
|
|
unsigned long *sp = stack, bp = 0;
|
|
struct pt_regs *segv_regs = current->thread.segv_regs;
|
|
int i;
|
|
|
|
if (!segv_regs && os_is_signal_stack()) {
|
|
printk(KERN_ERR "Received SIGSEGV in SIGSEGV handler,"
|
|
" aborting stack trace!\n");
|
|
return;
|
|
}
|
|
|
|
#ifdef CONFIG_FRAME_POINTER
|
|
bp = get_frame_pointer(task, segv_regs);
|
|
#endif
|
|
|
|
if (!stack)
|
|
sp = get_stack_pointer(task, segv_regs);
|
|
|
|
printk(KERN_INFO "Stack:\n");
|
|
stack = sp;
|
|
for (i = 0; i < 3 * STACKSLOTS_PER_LINE; i++) {
|
|
if (kstack_end(stack))
|
|
break;
|
|
if (i && ((i % STACKSLOTS_PER_LINE) == 0))
|
|
printk(KERN_CONT "\n");
|
|
printk(KERN_CONT " %08lx", *stack++);
|
|
}
|
|
printk(KERN_CONT "\n");
|
|
|
|
do_stack_trace(sp, bp);
|
|
}
|