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 #define ZT_CTX (1 << 4) 22 23 #define KSFT_BAD_MAGIC 0xdeadbeef 24 25 #define HDR_SZ \ 26 sizeof(struct _aarch64_ctx) 27 28 #define GET_SF_RESV_HEAD(sf) \ 29 (struct _aarch64_ctx *)(&(sf).uc.uc_mcontext.__reserved) 30 31 #define GET_SF_RESV_SIZE(sf) \ 32 sizeof((sf).uc.uc_mcontext.__reserved) 33 34 #define GET_BUF_RESV_HEAD(buf) \ 35 (struct _aarch64_ctx *)(&(buf).uc.uc_mcontext.__reserved) 36 37 #define GET_BUF_RESV_SIZE(buf) \ 38 (sizeof(buf) - sizeof(buf.uc) + \ 39 sizeof((buf).uc.uc_mcontext.__reserved)) 40 41 #define GET_UCP_RESV_SIZE(ucp) \ 42 sizeof((ucp)->uc_mcontext.__reserved) 43 44 #define ASSERT_BAD_CONTEXT(uc) do { \ 45 char *err = NULL; \ 46 if (!validate_reserved((uc), GET_UCP_RESV_SIZE((uc)), &err)) { \ 47 if (err) \ 48 fprintf(stderr, \ 49 "Using badly built context - ERR: %s\n",\ 50 err); \ 51 } else { \ 52 abort(); \ 53 } \ 54 } while (0) 55 56 #define ASSERT_GOOD_CONTEXT(uc) do { \ 57 char *err = NULL; \ 58 if (!validate_reserved((uc), GET_UCP_RESV_SIZE((uc)), &err)) { \ 59 if (err) \ 60 fprintf(stderr, \ 61 "Detected BAD context - ERR: %s\n", err);\ 62 abort(); \ 63 } else { \ 64 fprintf(stderr, "uc context validated.\n"); \ 65 } \ 66 } while (0) 67 68 /* 69 * A simple record-walker for __reserved area: it walks through assuming 70 * only to find a proper struct __aarch64_ctx header descriptor. 71 * 72 * Instead it makes no assumptions on the content and ordering of the 73 * records, any needed bounds checking must be enforced by the caller 74 * if wanted: this way can be used by caller on any maliciously built bad 75 * contexts. 76 * 77 * head->size accounts both for payload and header _aarch64_ctx size ! 78 */ 79 #define GET_RESV_NEXT_HEAD(h) \ 80 (struct _aarch64_ctx *)((char *)(h) + (h)->size) 81 82 struct fake_sigframe { 83 siginfo_t info; 84 ucontext_t uc; 85 }; 86 87 88 bool validate_reserved(ucontext_t *uc, size_t resv_sz, char **err); 89 90 struct _aarch64_ctx *get_header(struct _aarch64_ctx *head, uint32_t magic, 91 size_t resv_sz, size_t *offset); 92 93 static inline struct _aarch64_ctx *get_terminator(struct _aarch64_ctx *head, 94 size_t resv_sz, 95 size_t *offset) 96 { 97 return get_header(head, 0, resv_sz, offset); 98 } 99 100 static inline void write_terminator_record(struct _aarch64_ctx *tail) 101 { 102 if (tail) { 103 tail->magic = 0; 104 tail->size = 0; 105 } 106 } 107 108 struct _aarch64_ctx *get_starting_head(struct _aarch64_ctx *shead, 109 size_t need_sz, size_t resv_sz, 110 size_t *offset); 111 #endif 112