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
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