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 #define FPMR_CTX (1 << 5) 23 24 #define KSFT_BAD_MAGIC 0xdeadbeef 25 26 #define HDR_SZ \ 27 sizeof(struct _aarch64_ctx) 28 29 #define GET_SF_RESV_HEAD(sf) \ 30 (struct _aarch64_ctx *)(&(sf).uc.uc_mcontext.__reserved) 31 32 #define GET_SF_RESV_SIZE(sf) \ 33 sizeof((sf).uc.uc_mcontext.__reserved) 34 35 #define GET_BUF_RESV_HEAD(buf) \ 36 (struct _aarch64_ctx *)(&(buf).uc.uc_mcontext.__reserved) 37 38 #define GET_BUF_RESV_SIZE(buf) \ 39 (sizeof(buf) - sizeof(buf.uc) + \ 40 sizeof((buf).uc.uc_mcontext.__reserved)) 41 42 #define GET_UCP_RESV_SIZE(ucp) \ 43 sizeof((ucp)->uc_mcontext.__reserved) 44 45 #define ASSERT_BAD_CONTEXT(uc) do { \ 46 char *err = NULL; \ 47 if (!validate_reserved((uc), GET_UCP_RESV_SIZE((uc)), &err)) { \ 48 if (err) \ 49 fprintf(stderr, \ 50 "Using badly built context - ERR: %s\n",\ 51 err); \ 52 } else { \ 53 abort(); \ 54 } \ 55 } while (0) 56 57 #define ASSERT_GOOD_CONTEXT(uc) do { \ 58 char *err = NULL; \ 59 if (!validate_reserved((uc), GET_UCP_RESV_SIZE((uc)), &err)) { \ 60 if (err) \ 61 fprintf(stderr, \ 62 "Detected BAD context - ERR: %s\n", err);\ 63 abort(); \ 64 } else { \ 65 fprintf(stderr, "uc context validated.\n"); \ 66 } \ 67 } while (0) 68 69 /* 70 * A simple record-walker for __reserved area: it walks through assuming 71 * only to find a proper struct __aarch64_ctx header descriptor. 72 * 73 * Instead it makes no assumptions on the content and ordering of the 74 * records, any needed bounds checking must be enforced by the caller 75 * if wanted: this way can be used by caller on any maliciously built bad 76 * contexts. 77 * 78 * head->size accounts both for payload and header _aarch64_ctx size ! 79 */ 80 #define GET_RESV_NEXT_HEAD(h) \ 81 (struct _aarch64_ctx *)((char *)(h) + (h)->size) 82 83 struct fake_sigframe { 84 siginfo_t info; 85 ucontext_t uc; 86 }; 87 88 89 bool validate_reserved(ucontext_t *uc, size_t resv_sz, char **err); 90 91 struct _aarch64_ctx *get_header(struct _aarch64_ctx *head, uint32_t magic, 92 size_t resv_sz, size_t *offset); 93 94 static inline struct _aarch64_ctx *get_terminator(struct _aarch64_ctx *head, 95 size_t resv_sz, 96 size_t *offset) 97 { 98 return get_header(head, 0, resv_sz, offset); 99 } 100 101 static inline void write_terminator_record(struct _aarch64_ctx *tail) 102 { 103 if (tail) { 104 tail->magic = 0; 105 tail->size = 0; 106 } 107 } 108 109 struct _aarch64_ctx *get_starting_head(struct _aarch64_ctx *shead, 110 size_t need_sz, size_t resv_sz, 111 size_t *offset); 112 #endif 113