| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * Copyright (C) 2019 ARM Limited |
| * |
| * Place a fake sigframe on the stack at a misaligned SP: on sigreturn |
| * Kernel must spot this attempt and the test case is expected to be |
| * terminated via SEGV. |
| */ |
| |
| #include <signal.h> |
| #include <ucontext.h> |
| |
| #include "test_signals_utils.h" |
| #include "testcases.h" |
| |
| struct fake_sigframe sf; |
| |
| static int fake_sigreturn_misaligned_run(struct tdescr *td, |
| siginfo_t *si, ucontext_t *uc) |
| { |
| /* just to fill the ucontext_t with something real */ |
| if (!get_current_context(td, &sf.uc)) |
| return 1; |
| |
| /* Forcing sigframe on misaligned SP (16 + 3) */ |
| fake_sigreturn(&sf, sizeof(sf), 3); |
| |
| return 1; |
| } |
| |
| struct tdescr tde = { |
| .name = "FAKE_SIGRETURN_MISALIGNED_SP", |
| .descr = "Triggers a sigreturn with a misaligned sigframe", |
| .sig_ok = SIGSEGV, |
| .timeout = 3, |
| .run = fake_sigreturn_misaligned_run, |
| }; |
