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#include "arch-tests.h"
11
12#define STACK_SIZE 8192
13
14static int sample_ustack(struct perf_sample *sample,
15			 struct thread *thread, u64 *regs)
16{
17	struct stack_dump *stack = &sample->user_stack;
18	struct map *map;
19	unsigned long sp;
20	u64 stack_size, *buf;
21
22	buf = malloc(STACK_SIZE);
23	if (!buf) {
24		pr_debug("failed to allocate sample uregs data\n");
25		return -1;
26	}
27
28	sp = (unsigned long) regs[PERF_REG_POWERPC_R1];
29
30	map = maps__find(thread->maps, (u64)sp);
31	if (!map) {
32		pr_debug("failed to get stack map\n");
33		free(buf);
34		return -1;
35	}
36
37	stack_size = map->end - sp;
38	stack_size = stack_size > STACK_SIZE ? STACK_SIZE : stack_size;
39
40	memcpy(buf, (void *) sp, stack_size);
41	stack->data = (char *) buf;
42	stack->size = stack_size;
43	return 0;
44}
45
46int test__arch_unwind_sample(struct perf_sample *sample,
47			     struct thread *thread)
48{
49	struct regs_dump *regs = &sample->user_regs;
50	u64 *buf;
51
52	buf = calloc(1, sizeof(u64) * PERF_REGS_MAX);
53	if (!buf) {
54		pr_debug("failed to allocate sample uregs data\n");
55		return -1;
56	}
57
58	perf_regs_load(buf);
59	regs->abi  = PERF_SAMPLE_REGS_ABI;
60	regs->regs = buf;
61	regs->mask = PERF_REGS_MASK;
62
63	return sample_ustack(sample, thread, buf);
64}
65