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
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* System call table mapper
*
* (C) 2016 Arnaldo Carvalho de Melo <acme@redhat.com>
*/
#include "syscalltbl.h"
#include <stdlib.h>
#include <linux/compiler.h>
#ifdef HAVE_SYSCALL_TABLE_SUPPORT
#include <string.h>
#include "string2.h"
#include "util.h"
#if defined(__x86_64__)
#include <asm/syscalls_64.c>
const int syscalltbl_native_max_id = SYSCALLTBL_x86_64_MAX_ID;
static const char **syscalltbl_native = syscalltbl_x86_64;
#elif defined(__s390x__)
#include <asm/syscalls_64.c>
const int syscalltbl_native_max_id = SYSCALLTBL_S390_64_MAX_ID;
static const char **syscalltbl_native = syscalltbl_s390_64;
#elif defined(__powerpc64__)
#include <asm/syscalls_64.c>
const int syscalltbl_native_max_id = SYSCALLTBL_POWERPC_64_MAX_ID;
static const char **syscalltbl_native = syscalltbl_powerpc_64;
#elif defined(__powerpc__)
#include <asm/syscalls_32.c>
const int syscalltbl_native_max_id = SYSCALLTBL_POWERPC_32_MAX_ID;
static const char **syscalltbl_native = syscalltbl_powerpc_32;
#elif defined(__aarch64__)
#include <asm/syscalls.c>
const int syscalltbl_native_max_id = SYSCALLTBL_ARM64_MAX_ID;
static const char **syscalltbl_native = syscalltbl_arm64;
#endif
struct syscall {
int id;
const char *name;
};
static int syscallcmpname(const void *vkey, const void *ventry)
{
const char *key = vkey;
const struct syscall *entry = ventry;
return strcmp(key, entry->name);
}
static int syscallcmp(const void *va, const void *vb)
{
const struct syscall *a = va, *b = vb;
return strcmp(a->name, b->name);
}
static int syscalltbl__init_native(struct syscalltbl *tbl)
{
int nr_entries = 0, i, j;
struct syscall *entries;
for (i = 0; i <= syscalltbl_native_max_id; ++i)
if (syscalltbl_native[i])
++nr_entries;
entries = tbl->syscalls.entries = malloc(sizeof(struct syscall) * nr_entries);
if (tbl->syscalls.entries == NULL)
return -1;
for (i = 0, j = 0; i <= syscalltbl_native_max_id; ++i) {
if (syscalltbl_native[i]) {
entries[j].name = syscalltbl_native[i];
entries[j].id = i;
++j;
}
}
qsort(tbl->syscalls.entries, nr_entries, sizeof(struct syscall), syscallcmp);
tbl->syscalls.nr_entries = nr_entries;
return 0;
}
struct syscalltbl *syscalltbl__new(void)
{
struct syscalltbl *tbl = malloc(sizeof(*tbl));
if (tbl) {
if (syscalltbl__init_native(tbl)) {
free(tbl);
return NULL;
}
}
return tbl;
}
void syscalltbl__delete(struct syscalltbl *tbl)
{
zfree(&tbl->syscalls.entries);
free(tbl);
}
const char *syscalltbl__name(const struct syscalltbl *tbl __maybe_unused, int id)
{
return id <= syscalltbl_native_max_id ? syscalltbl_native[id]: NULL;
}
int syscalltbl__id(struct syscalltbl *tbl, const char *name)
{
struct syscall *sc = bsearch(name, tbl->syscalls.entries,
tbl->syscalls.nr_entries, sizeof(*sc),
syscallcmpname);
return sc ? sc->id : -1;
}
int syscalltbl__strglobmatch_next(struct syscalltbl *tbl, const char *syscall_glob, int *idx)
{
int i;
struct syscall *syscalls = tbl->syscalls.entries;
for (i = *idx + 1; i < tbl->syscalls.nr_entries; ++i) {
if (strglobmatch(syscalls[i].name, syscall_glob)) {
*idx = i;
return syscalls[i].id;
}
}
return -1;
}
int syscalltbl__strglobmatch_first(struct syscalltbl *tbl, const char *syscall_glob, int *idx)
{
*idx = -1;
return syscalltbl__strglobmatch_next(tbl, syscall_glob, idx);
}
#else /* HAVE_SYSCALL_TABLE_SUPPORT */
#include <libaudit.h>
struct syscalltbl *syscalltbl__new(void)
{
struct syscalltbl *tbl = malloc(sizeof(*tbl));
if (tbl)
tbl->audit_machine = audit_detect_machine();
return tbl;
}
void syscalltbl__delete(struct syscalltbl *tbl)
{
free(tbl);
}
const char *syscalltbl__name(const struct syscalltbl *tbl, int id)
{
return audit_syscall_to_name(id, tbl->audit_machine);
}
int syscalltbl__id(struct syscalltbl *tbl, const char *name)
{
return audit_name_to_syscall(name, tbl->audit_machine);
}
int syscalltbl__strglobmatch_next(struct syscalltbl *tbl __maybe_unused,
const char *syscall_glob __maybe_unused, int *idx __maybe_unused)
{
return -1;
}
int syscalltbl__strglobmatch_first(struct syscalltbl *tbl, const char *syscall_glob, int *idx)
{
return syscalltbl__strglobmatch_next(tbl, syscall_glob, idx);
}
#endif /* HAVE_SYSCALL_TABLE_SUPPORT */
|
