1 // SPDX-License-Identifier: GPL-2.0-only 1 // SPDX-License-Identifier: GPL-2.0-only
2 /* 2 /*
3 * System call table mapper 3 * System call table mapper
4 * 4 *
5 * (C) 2016 Arnaldo Carvalho de Melo <acme@red 5 * (C) 2016 Arnaldo Carvalho de Melo <acme@redhat.com>
6 */ 6 */
7 7
8 #include "syscalltbl.h" 8 #include "syscalltbl.h"
9 #include <stdlib.h> 9 #include <stdlib.h>
10 #include <linux/compiler.h> 10 #include <linux/compiler.h>
11 #include <linux/zalloc.h> 11 #include <linux/zalloc.h>
12 12
13 #ifdef HAVE_SYSCALL_TABLE_SUPPORT 13 #ifdef HAVE_SYSCALL_TABLE_SUPPORT
14 #include <string.h> 14 #include <string.h>
15 #include "string2.h" 15 #include "string2.h"
16 16
17 #if defined(__x86_64__) 17 #if defined(__x86_64__)
18 #include <asm/syscalls_64.c> 18 #include <asm/syscalls_64.c>
19 const int syscalltbl_native_max_id = SYSCALLTB 19 const int syscalltbl_native_max_id = SYSCALLTBL_x86_64_MAX_ID;
20 static const char *const *syscalltbl_native = 20 static const char *const *syscalltbl_native = syscalltbl_x86_64;
21 #elif defined(__i386__) <<
22 #include <asm/syscalls_32.c> <<
23 const int syscalltbl_native_max_id = SYSCALLTB <<
24 static const char *const *syscalltbl_native = <<
25 #elif defined(__s390x__) 21 #elif defined(__s390x__)
26 #include <asm/syscalls_64.c> 22 #include <asm/syscalls_64.c>
27 const int syscalltbl_native_max_id = SYSCALLTB 23 const int syscalltbl_native_max_id = SYSCALLTBL_S390_64_MAX_ID;
28 static const char *const *syscalltbl_native = 24 static const char *const *syscalltbl_native = syscalltbl_s390_64;
29 #elif defined(__powerpc64__) 25 #elif defined(__powerpc64__)
30 #include <asm/syscalls_64.c> 26 #include <asm/syscalls_64.c>
31 const int syscalltbl_native_max_id = SYSCALLTB 27 const int syscalltbl_native_max_id = SYSCALLTBL_POWERPC_64_MAX_ID;
32 static const char *const *syscalltbl_native = 28 static const char *const *syscalltbl_native = syscalltbl_powerpc_64;
33 #elif defined(__powerpc__) 29 #elif defined(__powerpc__)
34 #include <asm/syscalls_32.c> 30 #include <asm/syscalls_32.c>
35 const int syscalltbl_native_max_id = SYSCALLTB 31 const int syscalltbl_native_max_id = SYSCALLTBL_POWERPC_32_MAX_ID;
36 static const char *const *syscalltbl_native = 32 static const char *const *syscalltbl_native = syscalltbl_powerpc_32;
37 #elif defined(__aarch64__) 33 #elif defined(__aarch64__)
38 #include <asm/syscalls.c> 34 #include <asm/syscalls.c>
39 const int syscalltbl_native_max_id = SYSCALLTB 35 const int syscalltbl_native_max_id = SYSCALLTBL_ARM64_MAX_ID;
40 static const char *const *syscalltbl_native = 36 static const char *const *syscalltbl_native = syscalltbl_arm64;
41 #elif defined(__mips__) 37 #elif defined(__mips__)
42 #include <asm/syscalls_n64.c> 38 #include <asm/syscalls_n64.c>
43 const int syscalltbl_native_max_id = SYSCALLTB 39 const int syscalltbl_native_max_id = SYSCALLTBL_MIPS_N64_MAX_ID;
44 static const char *const *syscalltbl_native = 40 static const char *const *syscalltbl_native = syscalltbl_mips_n64;
45 #elif defined(__loongarch__) 41 #elif defined(__loongarch__)
46 #include <asm/syscalls.c> 42 #include <asm/syscalls.c>
47 const int syscalltbl_native_max_id = SYSCALLTB 43 const int syscalltbl_native_max_id = SYSCALLTBL_LOONGARCH_MAX_ID;
48 static const char *const *syscalltbl_native = 44 static const char *const *syscalltbl_native = syscalltbl_loongarch;
49 #else 45 #else
50 const int syscalltbl_native_max_id = 0; 46 const int syscalltbl_native_max_id = 0;
51 static const char *const syscalltbl_native[] = 47 static const char *const syscalltbl_native[] = {
52 [0] = "unknown", 48 [0] = "unknown",
53 }; 49 };
54 #endif 50 #endif
55 51
56 struct syscall { 52 struct syscall {
57 int id; 53 int id;
58 const char *name; 54 const char *name;
59 }; 55 };
60 56
61 static int syscallcmpname(const void *vkey, co 57 static int syscallcmpname(const void *vkey, const void *ventry)
62 { 58 {
63 const char *key = vkey; 59 const char *key = vkey;
64 const struct syscall *entry = ventry; 60 const struct syscall *entry = ventry;
65 61
66 return strcmp(key, entry->name); 62 return strcmp(key, entry->name);
67 } 63 }
68 64
69 static int syscallcmp(const void *va, const vo 65 static int syscallcmp(const void *va, const void *vb)
70 { 66 {
71 const struct syscall *a = va, *b = vb; 67 const struct syscall *a = va, *b = vb;
72 68
73 return strcmp(a->name, b->name); 69 return strcmp(a->name, b->name);
74 } 70 }
75 71
76 static int syscalltbl__init_native(struct sysc 72 static int syscalltbl__init_native(struct syscalltbl *tbl)
77 { 73 {
78 int nr_entries = 0, i, j; 74 int nr_entries = 0, i, j;
79 struct syscall *entries; 75 struct syscall *entries;
80 76
81 for (i = 0; i <= syscalltbl_native_max 77 for (i = 0; i <= syscalltbl_native_max_id; ++i)
82 if (syscalltbl_native[i]) 78 if (syscalltbl_native[i])
83 ++nr_entries; 79 ++nr_entries;
84 80
85 entries = tbl->syscalls.entries = mall 81 entries = tbl->syscalls.entries = malloc(sizeof(struct syscall) * nr_entries);
86 if (tbl->syscalls.entries == NULL) 82 if (tbl->syscalls.entries == NULL)
87 return -1; 83 return -1;
88 84
89 for (i = 0, j = 0; i <= syscalltbl_nat 85 for (i = 0, j = 0; i <= syscalltbl_native_max_id; ++i) {
90 if (syscalltbl_native[i]) { 86 if (syscalltbl_native[i]) {
91 entries[j].name = sysc 87 entries[j].name = syscalltbl_native[i];
92 entries[j].id = i; 88 entries[j].id = i;
93 ++j; 89 ++j;
94 } 90 }
95 } 91 }
96 92
97 qsort(tbl->syscalls.entries, nr_entrie 93 qsort(tbl->syscalls.entries, nr_entries, sizeof(struct syscall), syscallcmp);
98 tbl->syscalls.nr_entries = nr_entries; 94 tbl->syscalls.nr_entries = nr_entries;
99 tbl->syscalls.max_id = syscalltbl_ 95 tbl->syscalls.max_id = syscalltbl_native_max_id;
100 return 0; 96 return 0;
101 } 97 }
102 98
103 struct syscalltbl *syscalltbl__new(void) 99 struct syscalltbl *syscalltbl__new(void)
104 { 100 {
105 struct syscalltbl *tbl = malloc(sizeof 101 struct syscalltbl *tbl = malloc(sizeof(*tbl));
106 if (tbl) { 102 if (tbl) {
107 if (syscalltbl__init_native(tb 103 if (syscalltbl__init_native(tbl)) {
108 free(tbl); 104 free(tbl);
109 return NULL; 105 return NULL;
110 } 106 }
111 } 107 }
112 return tbl; 108 return tbl;
113 } 109 }
114 110
115 void syscalltbl__delete(struct syscalltbl *tbl 111 void syscalltbl__delete(struct syscalltbl *tbl)
116 { 112 {
117 zfree(&tbl->syscalls.entries); 113 zfree(&tbl->syscalls.entries);
118 free(tbl); 114 free(tbl);
119 } 115 }
120 116
121 const char *syscalltbl__name(const struct sysc 117 const char *syscalltbl__name(const struct syscalltbl *tbl __maybe_unused, int id)
122 { 118 {
123 return id <= syscalltbl_native_max_id 119 return id <= syscalltbl_native_max_id ? syscalltbl_native[id]: NULL;
124 } 120 }
125 121
126 int syscalltbl__id(struct syscalltbl *tbl, con 122 int syscalltbl__id(struct syscalltbl *tbl, const char *name)
127 { 123 {
128 struct syscall *sc = bsearch(name, tbl 124 struct syscall *sc = bsearch(name, tbl->syscalls.entries,
129 tbl->sysc 125 tbl->syscalls.nr_entries, sizeof(*sc),
130 syscallcm 126 syscallcmpname);
131 127
132 return sc ? sc->id : -1; 128 return sc ? sc->id : -1;
133 } 129 }
134 130
135 int syscalltbl__id_at_idx(struct syscalltbl *t 131 int syscalltbl__id_at_idx(struct syscalltbl *tbl, int idx)
136 { 132 {
137 struct syscall *syscalls = tbl->syscal 133 struct syscall *syscalls = tbl->syscalls.entries;
138 134
139 return idx < tbl->syscalls.nr_entries 135 return idx < tbl->syscalls.nr_entries ? syscalls[idx].id : -1;
140 } 136 }
141 137
142 int syscalltbl__strglobmatch_next(struct sysca 138 int syscalltbl__strglobmatch_next(struct syscalltbl *tbl, const char *syscall_glob, int *idx)
143 { 139 {
144 int i; 140 int i;
145 struct syscall *syscalls = tbl->syscal 141 struct syscall *syscalls = tbl->syscalls.entries;
146 142
147 for (i = *idx + 1; i < tbl->syscalls.n 143 for (i = *idx + 1; i < tbl->syscalls.nr_entries; ++i) {
148 if (strglobmatch(syscalls[i].n 144 if (strglobmatch(syscalls[i].name, syscall_glob)) {
149 *idx = i; 145 *idx = i;
150 return syscalls[i].id; 146 return syscalls[i].id;
151 } 147 }
152 } 148 }
153 149
154 return -1; 150 return -1;
155 } 151 }
156 152
157 int syscalltbl__strglobmatch_first(struct sysc 153 int syscalltbl__strglobmatch_first(struct syscalltbl *tbl, const char *syscall_glob, int *idx)
158 { 154 {
159 *idx = -1; 155 *idx = -1;
160 return syscalltbl__strglobmatch_next(t 156 return syscalltbl__strglobmatch_next(tbl, syscall_glob, idx);
161 } 157 }
162 158
163 #else /* HAVE_SYSCALL_TABLE_SUPPORT */ 159 #else /* HAVE_SYSCALL_TABLE_SUPPORT */
164 160
165 #include <libaudit.h> 161 #include <libaudit.h>
166 162
167 struct syscalltbl *syscalltbl__new(void) 163 struct syscalltbl *syscalltbl__new(void)
168 { 164 {
169 struct syscalltbl *tbl = zalloc(sizeof 165 struct syscalltbl *tbl = zalloc(sizeof(*tbl));
170 if (tbl) 166 if (tbl)
171 tbl->audit_machine = audit_det 167 tbl->audit_machine = audit_detect_machine();
172 return tbl; 168 return tbl;
173 } 169 }
174 170
175 void syscalltbl__delete(struct syscalltbl *tbl 171 void syscalltbl__delete(struct syscalltbl *tbl)
176 { 172 {
177 free(tbl); 173 free(tbl);
178 } 174 }
179 175
180 const char *syscalltbl__name(const struct sysc 176 const char *syscalltbl__name(const struct syscalltbl *tbl, int id)
181 { 177 {
182 return audit_syscall_to_name(id, tbl-> 178 return audit_syscall_to_name(id, tbl->audit_machine);
183 } 179 }
184 180
185 int syscalltbl__id(struct syscalltbl *tbl, con 181 int syscalltbl__id(struct syscalltbl *tbl, const char *name)
186 { 182 {
187 return audit_name_to_syscall(name, tbl 183 return audit_name_to_syscall(name, tbl->audit_machine);
188 } 184 }
189 185
190 int syscalltbl__id_at_idx(struct syscalltbl *t 186 int syscalltbl__id_at_idx(struct syscalltbl *tbl __maybe_unused, int idx)
191 { 187 {
192 return idx; 188 return idx;
193 } 189 }
194 190
195 int syscalltbl__strglobmatch_next(struct sysca 191 int syscalltbl__strglobmatch_next(struct syscalltbl *tbl __maybe_unused,
196 const char * 192 const char *syscall_glob __maybe_unused, int *idx __maybe_unused)
197 { 193 {
198 return -1; 194 return -1;
199 } 195 }
200 196
201 int syscalltbl__strglobmatch_first(struct sysc 197 int syscalltbl__strglobmatch_first(struct syscalltbl *tbl, const char *syscall_glob, int *idx)
202 { 198 {
203 return syscalltbl__strglobmatch_next(t 199 return syscalltbl__strglobmatch_next(tbl, syscall_glob, idx);
204 } 200 }
205 #endif /* HAVE_SYSCALL_TABLE_SUPPORT */ 201 #endif /* HAVE_SYSCALL_TABLE_SUPPORT */
206 202
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