1// SPDX-License-Identifier: GPL-2.0
2#include <string.h>
3#include "perf_regs.h"
4#include "thread.h"
5#include "map.h"
6#include "maps.h"
7#include "event.h"
8#include "debug.h"
9#include "tests/tests.h"
10
11#define STACK_SIZE 8192
12
13static int sample_ustack(struct perf_sample *sample,
14		struct thread *thread, u64 *regs)
15{
16	struct stack_dump *stack = &sample->user_stack;
17	struct map *map;
18	unsigned long sp;
19	u64 stack_size, *buf;
20
21	buf = malloc(STACK_SIZE);
22	if (!buf) {
23		pr_debug("failed to allocate sample uregs data\n");
24		return -1;
25	}
26
27	sp = (unsigned long) regs[PERF_REG_ARM64_SP];
28
29	map = maps__find(thread__maps(thread), (u64)sp);
30	if (!map) {
31		pr_debug("failed to get stack map\n");
32		free(buf);
33		return -1;
34	}
35
36	stack_size = map__end(map) - sp;
37	stack_size = stack_size > STACK_SIZE ? STACK_SIZE : stack_size;
38
39	memcpy(buf, (void *) sp, stack_size);
40	stack->data = (char *) buf;
41	stack->size = stack_size;
42	return 0;
43}
44
45int test__arch_unwind_sample(struct perf_sample *sample,
46		struct thread *thread)
47{
48	struct regs_dump *regs = &sample->user_regs;
49	u64 *buf;
50
51	buf = calloc(1, sizeof(u64) * PERF_REGS_MAX);
52	if (!buf) {
53		pr_debug("failed to allocate sample uregs data\n");
54		return -1;
55	}
56
57	perf_regs_load(buf);
58	regs->abi  = PERF_SAMPLE_REGS_ABI;
59	regs->regs = buf;
60	regs->mask = PERF_REGS_MASK;
61
62	return sample_ustack(sample, thread, buf);
63}
64