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