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c5ac25e0 JH |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * Copyright (C) 2022-2023 Loongson Technology Corporation Limited | |
4 | */ | |
5 | #include <linux/kernel.h> | |
6 | #include <linux/ftrace.h> | |
7 | ||
8 | #include <asm/unwind.h> | |
9 | ||
10 | bool default_next_frame(struct unwind_state *state) | |
11 | { | |
12 | struct stack_info *info = &state->stack_info; | |
13 | unsigned long addr; | |
14 | ||
15 | if (unwind_done(state)) | |
16 | return false; | |
17 | ||
18 | do { | |
19 | for (state->sp += sizeof(unsigned long); | |
20 | state->sp < info->end; state->sp += sizeof(unsigned long)) { | |
21 | addr = *(unsigned long *)(state->sp); | |
22 | state->pc = unwind_graph_addr(state, addr, state->sp + 8); | |
23 | if (__kernel_text_address(state->pc)) | |
24 | return true; | |
25 | } | |
26 | ||
27 | state->sp = info->next_sp; | |
28 | ||
29 | } while (!get_stack_info(state->sp, state->task, info)); | |
30 | ||
31 | return false; | |
32 | } |