projects / thirdparty / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ce36bfa GR |
1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd. | |
| 3 | ||
| 4 | #include <linux/ptrace.h> | |
| 5 | ||
| 6 | int kstack_depth_to_print = 48; | |
| 7 | ||
| 8 | void show_trace(unsigned long *stack) | |
| 9 | { | |
| 8f4f1639 GR |
10 | unsigned long *stack_end; |
| 11 | unsigned long *stack_start; | |
| 12 | unsigned long *fp; | |
| 2ce36bfa | 13 | unsigned long addr; |
| 2ce36bfa | 14 | |
| 8f4f1639 GR |
15 | addr = (unsigned long) stack & THREAD_MASK; |
| 16 | stack_start = (unsigned long *) addr; | |
| 17 | stack_end = (unsigned long *) (addr + THREAD_SIZE); | |
| 18 | ||
| 19 | fp = stack; | |
| 20 | pr_info("\nCall Trace:"); | |
| 21 | ||
| 22 | while (fp > stack_start && fp < stack_end) { | |
| 23 | #ifdef CONFIG_STACKTRACE | |
| 24 | addr = fp[1]; | |
| 25 | fp = (unsigned long *) fp[0]; | |
| 26 | #else | |
| 27 | addr = *fp++; | |
| 2ce36bfa | 28 | #endif |
| 8f4f1639 GR |
29 | if (__kernel_text_address(addr)) |
| 30 | pr_cont("\n[<%08lx>] %pS", addr, (void *)addr); | |
| 2ce36bfa GR |
31 | } |
| 32 | pr_cont("\n"); | |
| 33 | } | |
| 34 | ||
| 35 | void show_stack(struct task_struct *task, unsigned long *stack) | |
| 36 | { | |
| 2ce36bfa GR |
37 | if (!stack) { |
| 38 | if (task) | |
| 8f4f1639 | 39 | stack = (unsigned long *)thread_saved_fp(task); |
| 2ce36bfa | 40 | else |
| 131aee8b GR |
41 | #ifdef CONFIG_STACKTRACE |
| 42 | asm volatile("mov %0, r8\n":"=r"(stack)::"memory"); | |
| 43 | #else | |
| 2ce36bfa | 44 | stack = (unsigned long *)&stack; |
| 131aee8b | 45 | #endif |
| 2ce36bfa | 46 | } |
| 2ce36bfa | 47 | |
| 2ce36bfa GR |
48 | show_trace(stack); |
| 49 | } |