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