mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-15 00:04:15 +08:00
44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Stack trace management functions
|
|
*
|
|
* Copyright (C) 2009-2021 Helge Deller <deller@gmx.de>
|
|
* based on arch/x86/kernel/stacktrace.c by Ingo Molnar <mingo@redhat.com>
|
|
* and parisc unwind functions by Randolph Chung <tausq@debian.org>
|
|
*
|
|
* TODO: Userspace stacktrace (CONFIG_USER_STACKTRACE_SUPPORT)
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/stacktrace.h>
|
|
|
|
#include <asm/unwind.h>
|
|
|
|
static void notrace walk_stackframe(struct task_struct *task,
|
|
struct pt_regs *regs, bool (*fn)(void *, unsigned long), void *cookie)
|
|
{
|
|
struct unwind_frame_info info;
|
|
|
|
unwind_frame_init_task(&info, task, NULL);
|
|
while (1) {
|
|
if (unwind_once(&info) < 0 || info.ip == 0)
|
|
break;
|
|
|
|
if (__kernel_text_address(info.ip))
|
|
if (!fn(cookie, info.ip))
|
|
break;
|
|
}
|
|
}
|
|
|
|
void arch_stack_walk(stack_trace_consume_fn consume_entry, void *cookie,
|
|
struct task_struct *task, struct pt_regs *regs)
|
|
{
|
|
walk_stackframe(task, regs, consume_entry, cookie);
|
|
}
|
|
|
|
int arch_stack_walk_reliable(stack_trace_consume_fn consume_entry, void *cookie,
|
|
struct task_struct *task)
|
|
{
|
|
walk_stackframe(task, NULL, consume_entry, cookie);
|
|
return 1;
|
|
}
|