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 EXTRA_CTX (1 << 2)
20
21 #define KSFT_BAD_MAGIC 0xdeadbeef
22
23 #define HDR_SZ \
24 sizeof(struct _aarch64_ctx)
25
26 #define GET_SF_RESV_HEAD(sf) \
27 (struct _aarch64_ctx *)(&(sf).uc.uc_mcontext.__reserved)
28
29 #define GET_SF_RESV_SIZE(sf) \
30 sizeof((sf).uc.uc_mcontext.__reserved)
31
32 #define GET_UCP_RESV_SIZE(ucp) \
33 sizeof((ucp)->uc_mcontext.__reserved)
34
35 #define ASSERT_BAD_CONTEXT(uc) do { \
36 char *err = NULL; \
37 if (!validate_reserved((uc), GET_UCP_RESV_SIZE((uc)), &err)) { \
38 if (err) \
39 fprintf(stderr, \
40 "Using badly built context - ERR: %s\n",\
41 err); \
42 } else { \
43 abort(); \
44 } \
45 } while (0)
46
47 #define ASSERT_GOOD_CONTEXT(uc) do { \
48 char *err = NULL; \
49 if (!validate_reserved((uc), GET_UCP_RESV_SIZE((uc)), &err)) { \
50 if (err) \
51 fprintf(stderr, \
52 "Detected BAD context - ERR: %s\n", err);\
53 abort(); \
54 } else { \
55 fprintf(stderr, "uc context validated.\n"); \
56 } \
57 } while (0)
58
59 /*
60 * A simple record-walker for __reserved area: it walks through assuming
61 * only to find a proper struct __aarch64_ctx header descriptor.
62 *
63 * Instead it makes no assumptions on the content and ordering of the
64 * records, any needed bounds checking must be enforced by the caller
65 * if wanted: this way can be used by caller on any maliciously built bad
66 * contexts.
67 *
68 * head->size accounts both for payload and header _aarch64_ctx size !
69 */
70 #define GET_RESV_NEXT_HEAD(h) \
71 (struct _aarch64_ctx *)((char *)(h) + (h)->size)
72
73 struct fake_sigframe {
74 siginfo_t info;
75 ucontext_t uc;
76 };
77
78
79 bool validate_reserved(ucontext_t *uc, size_t resv_sz, char **err);
80
81 bool validate_extra_context(struct extra_context *extra, char **err);
82
83 struct _aarch64_ctx *get_header(struct _aarch64_ctx *head, uint32_t magic,
84 size_t resv_sz, size_t *offset);
85
get_terminator(struct _aarch64_ctx * head,size_t resv_sz,size_t * offset)86 static inline struct _aarch64_ctx *get_terminator(struct _aarch64_ctx *head,
87 size_t resv_sz,
88 size_t *offset)
89 {
90 return get_header(head, 0, resv_sz, offset);
91 }
92
write_terminator_record(struct _aarch64_ctx * tail)93 static inline void write_terminator_record(struct _aarch64_ctx *tail)
94 {
95 if (tail) {
96 tail->magic = 0;
97 tail->size = 0;
98 }
99 }
100
101 struct _aarch64_ctx *get_starting_head(struct _aarch64_ctx *shead,
102 size_t need_sz, size_t resv_sz,
103 size_t *offset);
104 #endif
105