1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2019 ARM Limited
4 *
5 * Place a fake sigframe on the stack including an additional FPSIMD
6 * record: on sigreturn Kernel must spot this attempt and the test
7 * case is expected to be terminated via SEGV.
8 */
9
10#include <signal.h>
11#include <ucontext.h>
12
13#include "test_signals_utils.h"
14#include "testcases.h"
15
16struct fake_sigframe sf;
17
18static int fake_sigreturn_duplicated_fpsimd_run(struct tdescr *td,
19						siginfo_t *si, ucontext_t *uc)
20{
21	struct _aarch64_ctx *shead = GET_SF_RESV_HEAD(sf), *head;
22
23	/* just to fill the ucontext_t with something real */
24	if (!get_current_context(td, &sf.uc, sizeof(sf.uc)))
25		return 1;
26
27	head = get_starting_head(shead, sizeof(struct fpsimd_context) + HDR_SZ,
28				 GET_SF_RESV_SIZE(sf), NULL);
29	if (!head)
30		return 0;
31
32	/* Add a spurious fpsimd_context */
33	head->magic = FPSIMD_MAGIC;
34	head->size = sizeof(struct fpsimd_context);
35	/* and terminate */
36	write_terminator_record(GET_RESV_NEXT_HEAD(head));
37
38	ASSERT_BAD_CONTEXT(&sf.uc);
39	fake_sigreturn(&sf, sizeof(sf), 0);
40
41	return 1;
42}
43
44struct tdescr tde = {
45		.name = "FAKE_SIGRETURN_DUPLICATED_FPSIMD",
46		.descr = "Triggers a sigreturn including two fpsimd_context",
47		.sig_ok = SIGSEGV,
48		.timeout = 3,
49		.run = fake_sigreturn_duplicated_fpsimd_run,
50};
51