1 // SPDX-License-Identifier: GPL-2.0-only <<
2 /* 1 /*
3 * System call table mapper 2 * System call table mapper
4 * 3 *
5 * (C) 2016 Arnaldo Carvalho de Melo <acme@red 4 * (C) 2016 Arnaldo Carvalho de Melo <acme@redhat.com>
>> 5 *
>> 6 * This program is free software; you can redistribute it and/or modify it
>> 7 * under the terms and conditions of the GNU General Public License,
>> 8 * version 2, as published by the Free Software Foundation.
>> 9 *
>> 10 * This program is distributed in the hope it will be useful, but WITHOUT
>> 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
>> 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
>> 13 * more details.
6 */ 14 */
7 15
8 #include "syscalltbl.h" 16 #include "syscalltbl.h"
9 #include <stdlib.h> 17 #include <stdlib.h>
10 #include <linux/compiler.h> 18 #include <linux/compiler.h>
11 #include <linux/zalloc.h> <<
12 19
13 #ifdef HAVE_SYSCALL_TABLE_SUPPORT 20 #ifdef HAVE_SYSCALL_TABLE_SUPPORT
14 #include <string.h> 21 #include <string.h>
15 #include "string2.h" 22 #include "string2.h"
>> 23 #include "util.h"
16 24
17 #if defined(__x86_64__) 25 #if defined(__x86_64__)
18 #include <asm/syscalls_64.c> 26 #include <asm/syscalls_64.c>
19 const int syscalltbl_native_max_id = SYSCALLTB 27 const int syscalltbl_native_max_id = SYSCALLTBL_x86_64_MAX_ID;
20 static const char *const *syscalltbl_native = !! 28 static const char **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__) 29 #elif defined(__s390x__)
26 #include <asm/syscalls_64.c> 30 #include <asm/syscalls_64.c>
27 const int syscalltbl_native_max_id = SYSCALLTB 31 const int syscalltbl_native_max_id = SYSCALLTBL_S390_64_MAX_ID;
28 static const char *const *syscalltbl_native = !! 32 static const char **syscalltbl_native = syscalltbl_s390_64;
29 #elif defined(__powerpc64__) 33 #elif defined(__powerpc64__)
30 #include <asm/syscalls_64.c> 34 #include <asm/syscalls_64.c>
31 const int syscalltbl_native_max_id = SYSCALLTB 35 const int syscalltbl_native_max_id = SYSCALLTBL_POWERPC_64_MAX_ID;
32 static const char *const *syscalltbl_native = !! 36 static const char **syscalltbl_native = syscalltbl_powerpc_64;
33 #elif defined(__powerpc__) 37 #elif defined(__powerpc__)
34 #include <asm/syscalls_32.c> 38 #include <asm/syscalls_32.c>
35 const int syscalltbl_native_max_id = SYSCALLTB 39 const int syscalltbl_native_max_id = SYSCALLTBL_POWERPC_32_MAX_ID;
36 static const char *const *syscalltbl_native = !! 40 static const char **syscalltbl_native = syscalltbl_powerpc_32;
37 #elif defined(__aarch64__) <<
38 #include <asm/syscalls.c> <<
39 const int syscalltbl_native_max_id = SYSCALLTB <<
40 static const char *const *syscalltbl_native = <<
41 #elif defined(__mips__) <<
42 #include <asm/syscalls_n64.c> <<
43 const int syscalltbl_native_max_id = SYSCALLTB <<
44 static const char *const *syscalltbl_native = <<
45 #elif defined(__loongarch__) <<
46 #include <asm/syscalls.c> <<
47 const int syscalltbl_native_max_id = SYSCALLTB <<
48 static const char *const *syscalltbl_native = <<
49 #else <<
50 const int syscalltbl_native_max_id = 0; <<
51 static const char *const syscalltbl_native[] = <<
52 [0] = "unknown", <<
53 }; <<
54 #endif 41 #endif
55 42
56 struct syscall { 43 struct syscall {
57 int id; 44 int id;
58 const char *name; 45 const char *name;
59 }; 46 };
60 47
61 static int syscallcmpname(const void *vkey, co 48 static int syscallcmpname(const void *vkey, const void *ventry)
62 { 49 {
63 const char *key = vkey; 50 const char *key = vkey;
64 const struct syscall *entry = ventry; 51 const struct syscall *entry = ventry;
65 52
66 return strcmp(key, entry->name); 53 return strcmp(key, entry->name);
67 } 54 }
68 55
69 static int syscallcmp(const void *va, const vo 56 static int syscallcmp(const void *va, const void *vb)
70 { 57 {
71 const struct syscall *a = va, *b = vb; 58 const struct syscall *a = va, *b = vb;
72 59
73 return strcmp(a->name, b->name); 60 return strcmp(a->name, b->name);
74 } 61 }
75 62
76 static int syscalltbl__init_native(struct sysc 63 static int syscalltbl__init_native(struct syscalltbl *tbl)
77 { 64 {
78 int nr_entries = 0, i, j; 65 int nr_entries = 0, i, j;
79 struct syscall *entries; 66 struct syscall *entries;
80 67
81 for (i = 0; i <= syscalltbl_native_max 68 for (i = 0; i <= syscalltbl_native_max_id; ++i)
82 if (syscalltbl_native[i]) 69 if (syscalltbl_native[i])
83 ++nr_entries; 70 ++nr_entries;
84 71
85 entries = tbl->syscalls.entries = mall 72 entries = tbl->syscalls.entries = malloc(sizeof(struct syscall) * nr_entries);
86 if (tbl->syscalls.entries == NULL) 73 if (tbl->syscalls.entries == NULL)
87 return -1; 74 return -1;
88 75
89 for (i = 0, j = 0; i <= syscalltbl_nat 76 for (i = 0, j = 0; i <= syscalltbl_native_max_id; ++i) {
90 if (syscalltbl_native[i]) { 77 if (syscalltbl_native[i]) {
91 entries[j].name = sysc 78 entries[j].name = syscalltbl_native[i];
92 entries[j].id = i; 79 entries[j].id = i;
93 ++j; 80 ++j;
94 } 81 }
95 } 82 }
96 83
97 qsort(tbl->syscalls.entries, nr_entrie 84 qsort(tbl->syscalls.entries, nr_entries, sizeof(struct syscall), syscallcmp);
98 tbl->syscalls.nr_entries = nr_entries; 85 tbl->syscalls.nr_entries = nr_entries;
99 tbl->syscalls.max_id = syscalltbl_ <<
100 return 0; 86 return 0;
101 } 87 }
102 88
103 struct syscalltbl *syscalltbl__new(void) 89 struct syscalltbl *syscalltbl__new(void)
104 { 90 {
105 struct syscalltbl *tbl = malloc(sizeof 91 struct syscalltbl *tbl = malloc(sizeof(*tbl));
106 if (tbl) { 92 if (tbl) {
107 if (syscalltbl__init_native(tb 93 if (syscalltbl__init_native(tbl)) {
108 free(tbl); 94 free(tbl);
109 return NULL; 95 return NULL;
110 } 96 }
111 } 97 }
112 return tbl; 98 return tbl;
113 } 99 }
114 100
115 void syscalltbl__delete(struct syscalltbl *tbl 101 void syscalltbl__delete(struct syscalltbl *tbl)
116 { 102 {
117 zfree(&tbl->syscalls.entries); 103 zfree(&tbl->syscalls.entries);
118 free(tbl); 104 free(tbl);
119 } 105 }
120 106
121 const char *syscalltbl__name(const struct sysc 107 const char *syscalltbl__name(const struct syscalltbl *tbl __maybe_unused, int id)
122 { 108 {
123 return id <= syscalltbl_native_max_id 109 return id <= syscalltbl_native_max_id ? syscalltbl_native[id]: NULL;
124 } 110 }
125 111
126 int syscalltbl__id(struct syscalltbl *tbl, con 112 int syscalltbl__id(struct syscalltbl *tbl, const char *name)
127 { 113 {
128 struct syscall *sc = bsearch(name, tbl 114 struct syscall *sc = bsearch(name, tbl->syscalls.entries,
129 tbl->sysc 115 tbl->syscalls.nr_entries, sizeof(*sc),
130 syscallcm 116 syscallcmpname);
131 117
132 return sc ? sc->id : -1; 118 return sc ? sc->id : -1;
133 } 119 }
134 120
135 int syscalltbl__id_at_idx(struct syscalltbl *t <<
136 { <<
137 struct syscall *syscalls = tbl->syscal <<
138 <<
139 return idx < tbl->syscalls.nr_entries <<
140 } <<
141 <<
142 int syscalltbl__strglobmatch_next(struct sysca 121 int syscalltbl__strglobmatch_next(struct syscalltbl *tbl, const char *syscall_glob, int *idx)
143 { 122 {
144 int i; 123 int i;
145 struct syscall *syscalls = tbl->syscal 124 struct syscall *syscalls = tbl->syscalls.entries;
146 125
147 for (i = *idx + 1; i < tbl->syscalls.n 126 for (i = *idx + 1; i < tbl->syscalls.nr_entries; ++i) {
148 if (strglobmatch(syscalls[i].n 127 if (strglobmatch(syscalls[i].name, syscall_glob)) {
149 *idx = i; 128 *idx = i;
150 return syscalls[i].id; 129 return syscalls[i].id;
151 } 130 }
152 } 131 }
153 132
154 return -1; 133 return -1;
155 } 134 }
156 135
157 int syscalltbl__strglobmatch_first(struct sysc 136 int syscalltbl__strglobmatch_first(struct syscalltbl *tbl, const char *syscall_glob, int *idx)
158 { 137 {
159 *idx = -1; 138 *idx = -1;
160 return syscalltbl__strglobmatch_next(t 139 return syscalltbl__strglobmatch_next(tbl, syscall_glob, idx);
161 } 140 }
162 141
163 #else /* HAVE_SYSCALL_TABLE_SUPPORT */ 142 #else /* HAVE_SYSCALL_TABLE_SUPPORT */
164 143
165 #include <libaudit.h> 144 #include <libaudit.h>
166 145
167 struct syscalltbl *syscalltbl__new(void) 146 struct syscalltbl *syscalltbl__new(void)
168 { 147 {
169 struct syscalltbl *tbl = zalloc(sizeof !! 148 struct syscalltbl *tbl = malloc(sizeof(*tbl));
170 if (tbl) 149 if (tbl)
171 tbl->audit_machine = audit_det 150 tbl->audit_machine = audit_detect_machine();
172 return tbl; 151 return tbl;
173 } 152 }
174 153
175 void syscalltbl__delete(struct syscalltbl *tbl 154 void syscalltbl__delete(struct syscalltbl *tbl)
176 { 155 {
177 free(tbl); 156 free(tbl);
178 } 157 }
179 158
180 const char *syscalltbl__name(const struct sysc 159 const char *syscalltbl__name(const struct syscalltbl *tbl, int id)
181 { 160 {
182 return audit_syscall_to_name(id, tbl-> 161 return audit_syscall_to_name(id, tbl->audit_machine);
183 } 162 }
184 163
185 int syscalltbl__id(struct syscalltbl *tbl, con 164 int syscalltbl__id(struct syscalltbl *tbl, const char *name)
186 { 165 {
187 return audit_name_to_syscall(name, tbl 166 return audit_name_to_syscall(name, tbl->audit_machine);
188 } <<
189 <<
190 int syscalltbl__id_at_idx(struct syscalltbl *t <<
191 { <<
192 return idx; <<
193 } 167 }
194 168
195 int syscalltbl__strglobmatch_next(struct sysca 169 int syscalltbl__strglobmatch_next(struct syscalltbl *tbl __maybe_unused,
196 const char * 170 const char *syscall_glob __maybe_unused, int *idx __maybe_unused)
197 { 171 {
198 return -1; 172 return -1;
199 } 173 }
200 174
201 int syscalltbl__strglobmatch_first(struct sysc 175 int syscalltbl__strglobmatch_first(struct syscalltbl *tbl, const char *syscall_glob, int *idx)
202 { 176 {
203 return syscalltbl__strglobmatch_next(t 177 return syscalltbl__strglobmatch_next(tbl, syscall_glob, idx);
204 } 178 }
205 #endif /* HAVE_SYSCALL_TABLE_SUPPORT */ 179 #endif /* HAVE_SYSCALL_TABLE_SUPPORT */
206 180
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