1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
// SPDX-License-Identifier: BSD-2-Clause
/*-
* Copyright (c) 2023 Andes Technology Corporation
* Copyright (c) 2015-2019 Linaro Limited
* Copyright (c) 2015 The FreeBSD Foundation
*/
#include <compiler.h>
#include <string.h>
#include <trace.h>
#include <types_ext.h>
#include <unw/unwind.h>
#include <util.h>
void __weak ftrace_map_lr(uint64_t *lr __unused)
{
}
bool unwind_stack_riscv(struct unwind_state_riscv *frame,
vaddr_t stack, size_t stack_size)
{
vaddr_t fp = frame->fp;
struct unwind_state_riscv *caller_state = NULL;
if (fp < stack)
return false;
if (fp > stack + stack_size)
return false;
/*
* | ..... | ^ unwind upwards
* | ..... | |
* +=============+ <--+ | +======= caller FP ==========+
* | RA | | |
* +-------------+ | |
* | caller FP | ---|-+ ^
* +-------------+ | caller stack frame
* | ..... | | v
* | ..... | |
* | ..... | |
* +=============+ | +== caller SP / trapped FP ==+
* | RA | |
* +-------------+ |
* | caller FP | ---+ ^
* +-------------+ trapped stack frame
* | ..... | v
* | ..... |
* | ..... |
* +=============+ +======== trapped SP ========+
* |
* | grow downwards
* V
*/
/* Get caller FP and RA */
caller_state = (struct unwind_state_riscv *)fp - 1;
frame->fp = caller_state->fp;
frame->pc = caller_state->pc;
ftrace_map_lr(&frame->pc);
frame->pc -= 4;
return true;
}
void print_stack_riscv(struct unwind_state_riscv *state,
vaddr_t stack, size_t stack_size)
{
int width = sizeof(unsigned long);
trace_printf_helper_raw(TRACE_ERROR, true, "Call stack:");
ftrace_map_lr(&state->pc);
do {
trace_printf_helper_raw(TRACE_ERROR, true, " 0x%0*"PRIxVA,
width, state->pc);
} while (unwind_stack_riscv(state, stack, stack_size));
}
|
