| // 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, sizeof(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, |
| }; |