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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2019 ARM Limited
*
* Place a fake sigframe on the stack missing the mandatory FPSIMD
* record: on sigreturn Kernel must spot this attempt and the test
* case is expected to be terminated via SEGV.
*/
#include <stdio.h>
#include <signal.h>
#include <ucontext.h>
#include "test_signals_utils.h"
#include "testcases.h"
struct fake_sigframe sf;
static int fake_sigreturn_missing_fpsimd_run(struct tdescr *td,
siginfo_t *si, ucontext_t *uc)
{
size_t resv_sz, offset;
struct _aarch64_ctx *head = GET_SF_RESV_HEAD(sf);
/* just to fill the ucontext_t with something real */
if (!get_current_context(td, &sf.uc))
return 1;
resv_sz = GET_SF_RESV_SIZE(sf);
head = get_header(head, FPSIMD_MAGIC, resv_sz, &offset);
if (head && resv_sz - offset >= HDR_SZ) {
fprintf(stderr, "Mangling template header. Spare space:%zd\n",
resv_sz - offset);
/* Just overwrite fpsmid_context */
write_terminator_record(head);
ASSERT_BAD_CONTEXT(&sf.uc);
fake_sigreturn(&sf, sizeof(sf), 0);
}
return 1;
}
struct tdescr tde = {
.name = "FAKE_SIGRETURN_MISSING_FPSIMD",
.descr = "Triggers a sigreturn with a missing fpsimd_context",
.sig_ok = SIGSEGV,
.timeout = 3,
.run = fake_sigreturn_missing_fpsimd_run,
};
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