1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (C) 2019 ARM Limited */
#ifndef __TESTCASES_H__
#define __TESTCASES_H__
#include <stddef.h>
#include <stdio.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
#include <ucontext.h>
#include <signal.h>
/* Architecture specific sigframe definitions */
#include <asm/sigcontext.h>
#define FPSIMD_CTX (1 << 0)
#define SVE_CTX (1 << 1)
#define ZA_CTX (1 << 2)
#define EXTRA_CTX (1 << 3)
#define ZT_CTX (1 << 4)
#define FPMR_CTX (1 << 5)
#define KSFT_BAD_MAGIC 0xdeadbeef
#define HDR_SZ \
sizeof(struct _aarch64_ctx)
#define GET_SF_RESV_HEAD(sf) \
(struct _aarch64_ctx *)(&(sf).uc.uc_mcontext.__reserved)
#define GET_SF_RESV_SIZE(sf) \
sizeof((sf).uc.uc_mcontext.__reserved)
#define GET_BUF_RESV_HEAD(buf) \
(struct _aarch64_ctx *)(&(buf).uc.uc_mcontext.__reserved)
#define GET_BUF_RESV_SIZE(buf) \
(sizeof(buf) - sizeof(buf.uc) + \
sizeof((buf).uc.uc_mcontext.__reserved))
#define GET_UCP_RESV_SIZE(ucp) \
sizeof((ucp)->uc_mcontext.__reserved)
#define ASSERT_BAD_CONTEXT(uc) do { \
char *err = NULL; \
if (!validate_reserved((uc), GET_UCP_RESV_SIZE((uc)), &err)) { \
if (err) \
fprintf(stderr, \
"Using badly built context - ERR: %s\n",\
err); \
} else { \
abort(); \
} \
} while (0)
#define ASSERT_GOOD_CONTEXT(uc) do { \
char *err = NULL; \
if (!validate_reserved((uc), GET_UCP_RESV_SIZE((uc)), &err)) { \
if (err) \
fprintf(stderr, \
"Detected BAD context - ERR: %s\n", err);\
abort(); \
} else { \
fprintf(stderr, "uc context validated.\n"); \
} \
} while (0)
/*
* A simple record-walker for __reserved area: it walks through assuming
* only to find a proper struct __aarch64_ctx header descriptor.
*
* Instead it makes no assumptions on the content and ordering of the
* records, any needed bounds checking must be enforced by the caller
* if wanted: this way can be used by caller on any maliciously built bad
* contexts.
*
* head->size accounts both for payload and header _aarch64_ctx size !
*/
#define GET_RESV_NEXT_HEAD(h) \
(struct _aarch64_ctx *)((char *)(h) + (h)->size)
struct fake_sigframe {
siginfo_t info;
ucontext_t uc;
};
bool validate_reserved(ucontext_t *uc, size_t resv_sz, char **err);
struct _aarch64_ctx *get_header(struct _aarch64_ctx *head, uint32_t magic,
size_t resv_sz, size_t *offset);
static inline struct _aarch64_ctx *get_terminator(struct _aarch64_ctx *head,
size_t resv_sz,
size_t *offset)
{
return get_header(head, 0, resv_sz, offset);
}
static inline void write_terminator_record(struct _aarch64_ctx *tail)
{
if (tail) {
tail->magic = 0;
tail->size = 0;
}
}
struct _aarch64_ctx *get_starting_head(struct _aarch64_ctx *shead,
size_t need_sz, size_t resv_sz,
size_t *offset);
#endif
|
