1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2019 ARM Limited 4 * 5 * Place a fake sigframe on the stack including an additional FPSIMD 6 * record: on sigreturn Kernel must spot this attempt and the test 7 * case is expected to be terminated via SEGV. 8 */ 9 10 #include <signal.h> 11 #include <ucontext.h> 12 13 #include "test_signals_utils.h" 14 #include "testcases.h" 15 16 struct fake_sigframe sf; 17 18 static int fake_sigreturn_duplicated_fpsimd_run(struct tdescr *td, 19 siginfo_t *si, ucontext_t *uc) 20 { 21 struct _aarch64_ctx *shead = GET_SF_RESV_HEAD(sf), *head; 22 23 /* just to fill the ucontext_t with something real */ 24 if (!get_current_context(td, &sf.uc, sizeof(sf.uc))) 25 return 1; 26 27 head = get_starting_head(shead, sizeof(struct fpsimd_context) + HDR_SZ, 28 GET_SF_RESV_SIZE(sf), NULL); 29 if (!head) 30 return 0; 31 32 /* Add a spurious fpsimd_context */ 33 head->magic = FPSIMD_MAGIC; 34 head->size = sizeof(struct fpsimd_context); 35 /* and terminate */ 36 write_terminator_record(GET_RESV_NEXT_HEAD(head)); 37 38 ASSERT_BAD_CONTEXT(&sf.uc); 39 fake_sigreturn(&sf, sizeof(sf), 0); 40 41 return 1; 42 } 43 44 struct tdescr tde = { 45 .name = "FAKE_SIGRETURN_DUPLICATED_FPSIMD", 46 .descr = "Triggers a sigreturn including two fpsimd_context", 47 .sig_ok = SIGSEGV, 48 .timeout = 3, 49 .run = fake_sigreturn_duplicated_fpsimd_run, 50 }; 51