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