| 1 | // SPDX-License-Identifier: GPL-2.0 |
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| 2 | /* |
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| 3 | * Copyright (C) 2019 ARM Limited |
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| 4 | * |
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| 5 | * Place a fake sigframe on the stack missing the mandatory FPSIMD |
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| 6 | * record: on sigreturn Kernel must spot this attempt and the test |
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| 7 | * case is expected to be terminated via SEGV. |
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| 8 | */ |
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| 9 | |
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| 10 | #include <stdio.h> |
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| 11 | #include <signal.h> |
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| 12 | #include <ucontext.h> |
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| 13 | |
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| 14 | #include "test_signals_utils.h" |
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| 15 | #include "testcases.h" |
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| 16 | |
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| 17 | struct fake_sigframe sf; |
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| 18 | |
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| 19 | static int fake_sigreturn_missing_fpsimd_run(struct tdescr *td, |
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| 20 | siginfo_t *si, ucontext_t *uc) |
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| 21 | { |
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| 22 | size_t resv_sz, offset; |
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| 23 | struct _aarch64_ctx *head = GET_SF_RESV_HEAD(sf); |
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| 24 | |
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| 25 | /* just to fill the ucontext_t with something real */ |
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| 26 | if (!get_current_context(td, &sf.uc, sizeof(sf.uc))) |
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| 27 | return 1; |
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| 28 | |
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| 29 | resv_sz = GET_SF_RESV_SIZE(sf); |
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| 30 | head = get_header(head, magic: FPSIMD_MAGIC, resv_sz, offset: &offset); |
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| 31 | if (head && resv_sz - offset >= HDR_SZ) { |
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| 32 | fprintf(stderr, "Mangling template header. Spare space:%zd\n" , |
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| 33 | resv_sz - offset); |
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| 34 | /* Just overwrite fpsmid_context */ |
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| 35 | write_terminator_record(tail: head); |
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| 36 | |
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| 37 | ASSERT_BAD_CONTEXT(&sf.uc); |
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| 38 | fake_sigreturn(&sf, sizeof(sf), 0); |
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| 39 | } |
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| 40 | |
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| 41 | return 1; |
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| 42 | } |
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| 43 | |
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| 44 | struct tdescr tde = { |
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| 45 | .name = "FAKE_SIGRETURN_MISSING_FPSIMD" , |
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| 46 | .descr = "Triggers a sigreturn with a missing fpsimd_context" , |
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| 47 | .sig_ok = SIGSEGV, |
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| 48 | .timeout = 3, |
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| 49 | .run = fake_sigreturn_missing_fpsimd_run, |
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| 50 | }; |
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| 51 | |
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