| 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 at a misaligned SP: on sigreturn |
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| 6 | * Kernel must spot this attempt and the test case is expected to be |
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| 7 | * terminated via SEGV. |
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| 8 | */ |
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| 9 | |
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| 10 | #include <signal.h> |
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| 11 | #include <ucontext.h> |
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| 12 | |
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| 13 | #include "test_signals_utils.h" |
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| 14 | #include "testcases.h" |
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| 15 | |
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| 16 | struct fake_sigframe sf; |
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| 17 | |
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| 18 | static int fake_sigreturn_misaligned_run(struct tdescr *td, |
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| 19 | siginfo_t *si, ucontext_t *uc) |
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| 20 | { |
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| 21 | /* just to fill the ucontext_t with something real */ |
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| 22 | if (!get_current_context(td, &sf.uc, sizeof(sf.uc))) |
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| 23 | return 1; |
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| 24 | |
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| 25 | /* Forcing sigframe on misaligned SP (16 + 3) */ |
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| 26 | fake_sigreturn(&sf, sizeof(sf), 3); |
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| 27 | |
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| 28 | return 1; |
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| 29 | } |
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| 30 | |
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| 31 | struct tdescr tde = { |
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| 32 | .name = "FAKE_SIGRETURN_MISALIGNED_SP" , |
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| 33 | .descr = "Triggers a sigreturn with a misaligned sigframe" , |
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| 34 | .sig_ok = SIGSEGV, |
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| 35 | .timeout = 3, |
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| 36 | .run = fake_sigreturn_misaligned_run, |
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| 37 | }; |
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| 38 | |
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