1 // SPDX-License-Identifier: GPL-2.0-only
3 * Stack trace management functions
9 * TODO: Userspace stacktrace (CONFIG_USER_STACKTRACE_SUPPORT)
11 #include <linux/kernel.h>
12 #include <linux/stacktrace.h>
14 #include <asm/unwind.h>
16 static void notrace walk_stackframe(struct task_struct *task,
17 struct pt_regs *regs, bool (*fn)(void *, unsigned long), void *cookie)
19 struct unwind_frame_info info;
21 unwind_frame_init_task(&info, task, NULL);
23 if (unwind_once(&info) < 0 || info.ip == 0)
26 if (__kernel_text_address(info.ip))
27 if (!fn(cookie, info.ip))
32 void arch_stack_walk(stack_trace_consume_fn consume_entry, void *cookie,
33 struct task_struct *task, struct pt_regs *regs)
35 walk_stackframe(task, regs, consume_entry, cookie);
38 int arch_stack_walk_reliable(stack_trace_consume_fn consume_entry, void *cookie,
39 struct task_struct *task)
41 walk_stackframe(task, NULL, consume_entry, cookie);