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
get_terminator(struct _aarch64_ctx * head,size_t resv_sz,size_t * offset)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
write_terminator_record(struct _aarch64_ctx * tail)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