1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* Copyright (C) 2019 ARM Limited */ 3 #ifndef __TESTCASES_H__ 4 #define __TESTCASES_H__ 5 6 #include <stddef.h> 7 #include <stdio.h> 8 #include <stdbool.h> 9 #include <stdint.h> 10 #include <stdlib.h> 11 #include <ucontext.h> 12 #include <signal.h> 13 14 /* Architecture specific sigframe definitions */ 15 #include <asm/sigcontext.h> 16 17 #define FPSIMD_CTX (1 << 0) 18 #define SVE_CTX (1 << 1) 19 #define ZA_CTX (1 << 2) 20 #define EXTRA_CTX (1 << 3) 21 22 #define KSFT_BAD_MAGIC 0xdeadbeef 23 24 #define HDR_SZ \ 25 sizeof(struct _aarch64_ctx) 26 27 #define GET_SF_RESV_HEAD(sf) \ 28 (struct _aarch64_ctx *)(&(sf).uc.uc_mcontext.__reserved) 29 30 #define GET_SF_RESV_SIZE(sf) \ 31 sizeof((sf).uc.uc_mcontext.__reserved) 32 33 #define GET_UCP_RESV_SIZE(ucp) \ 34 sizeof((ucp)->uc_mcontext.__reserved) 35 36 #define ASSERT_BAD_CONTEXT(uc) do { \ 37 char *err = NULL; \ 38 if (!validate_reserved((uc), GET_UCP_RESV_SIZE((uc)), &err)) { \ 39 if (err) \ 40 fprintf(stderr, \ 41 "Using badly built context - ERR: %s\n",\ 42 err); \ 43 } else { \ 44 abort(); \ 45 } \ 46 } while (0) 47 48 #define ASSERT_GOOD_CONTEXT(uc) do { \ 49 char *err = NULL; \ 50 if (!validate_reserved((uc), GET_UCP_RESV_SIZE((uc)), &err)) { \ 51 if (err) \ 52 fprintf(stderr, \ 53 "Detected BAD context - ERR: %s\n", err);\ 54 abort(); \ 55 } else { \ 56 fprintf(stderr, "uc context validated.\n"); \ 57 } \ 58 } while (0) 59 60 /* 61 * A simple record-walker for __reserved area: it walks through assuming 62 * only to find a proper struct __aarch64_ctx header descriptor. 63 * 64 * Instead it makes no assumptions on the content and ordering of the 65 * records, any needed bounds checking must be enforced by the caller 66 * if wanted: this way can be used by caller on any maliciously built bad 67 * contexts. 68 * 69 * head->size accounts both for payload and header _aarch64_ctx size ! 70 */ 71 #define GET_RESV_NEXT_HEAD(h) \ 72 (struct _aarch64_ctx *)((char *)(h) + (h)->size) 73 74 struct fake_sigframe { 75 siginfo_t info; 76 ucontext_t uc; 77 }; 78 79 80 bool validate_reserved(ucontext_t *uc, size_t resv_sz, char **err); 81 82 bool validate_extra_context(struct extra_context *extra, char **err); 83 84 struct _aarch64_ctx *get_header(struct _aarch64_ctx *head, uint32_t magic, 85 size_t resv_sz, size_t *offset); 86 87 static inline struct _aarch64_ctx *get_terminator(struct _aarch64_ctx *head, 88 size_t resv_sz, 89 size_t *offset) 90 { 91 return get_header(head, 0, resv_sz, offset); 92 } 93 94 static inline void write_terminator_record(struct _aarch64_ctx *tail) 95 { 96 if (tail) { 97 tail->magic = 0; 98 tail->size = 0; 99 } 100 } 101 102 struct _aarch64_ctx *get_starting_head(struct _aarch64_ctx *shead, 103 size_t need_sz, size_t resv_sz, 104 size_t *offset); 105 #endif 106