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8#include "syscalltbl.h"
9#include <stdlib.h>
10#include <linux/compiler.h>
11#include <linux/zalloc.h>
12
13#ifdef HAVE_SYSCALL_TABLE_SUPPORT
14#include <string.h>
15#include "string2.h"
16
17#if defined(__x86_64__)
18#include <asm/syscalls_64.c>
19const int syscalltbl_native_max_id = SYSCALLTBL_x86_64_MAX_ID;
20static const char **syscalltbl_native = syscalltbl_x86_64;
21#elif defined(__s390x__)
22#include <asm/syscalls_64.c>
23const int syscalltbl_native_max_id = SYSCALLTBL_S390_64_MAX_ID;
24static const char **syscalltbl_native = syscalltbl_s390_64;
25#elif defined(__powerpc64__)
26#include <asm/syscalls_64.c>
27const int syscalltbl_native_max_id = SYSCALLTBL_POWERPC_64_MAX_ID;
28static const char **syscalltbl_native = syscalltbl_powerpc_64;
29#elif defined(__powerpc__)
30#include <asm/syscalls_32.c>
31const int syscalltbl_native_max_id = SYSCALLTBL_POWERPC_32_MAX_ID;
32static const char **syscalltbl_native = syscalltbl_powerpc_32;
33#elif defined(__aarch64__)
34#include <asm/syscalls.c>
35const int syscalltbl_native_max_id = SYSCALLTBL_ARM64_MAX_ID;
36static const char **syscalltbl_native = syscalltbl_arm64;
37#elif defined(__mips__)
38#include <asm/syscalls_n64.c>
39const int syscalltbl_native_max_id = SYSCALLTBL_MIPS_N64_MAX_ID;
40static const char **syscalltbl_native = syscalltbl_mips_n64;
41#endif
42
43struct syscall {
44 int id;
45 const char *name;
46};
47
48static int syscallcmpname(const void *vkey, const void *ventry)
49{
50 const char *key = vkey;
51 const struct syscall *entry = ventry;
52
53 return strcmp(key, entry->name);
54}
55
56static int syscallcmp(const void *va, const void *vb)
57{
58 const struct syscall *a = va, *b = vb;
59
60 return strcmp(a->name, b->name);
61}
62
63static int syscalltbl__init_native(struct syscalltbl *tbl)
64{
65 int nr_entries = 0, i, j;
66 struct syscall *entries;
67
68 for (i = 0; i <= syscalltbl_native_max_id; ++i)
69 if (syscalltbl_native[i])
70 ++nr_entries;
71
72 entries = tbl->syscalls.entries = malloc(sizeof(struct syscall) * nr_entries);
73 if (tbl->syscalls.entries == NULL)
74 return -1;
75
76 for (i = 0, j = 0; i <= syscalltbl_native_max_id; ++i) {
77 if (syscalltbl_native[i]) {
78 entries[j].name = syscalltbl_native[i];
79 entries[j].id = i;
80 ++j;
81 }
82 }
83
84 qsort(tbl->syscalls.entries, nr_entries, sizeof(struct syscall), syscallcmp);
85 tbl->syscalls.nr_entries = nr_entries;
86 tbl->syscalls.max_id = syscalltbl_native_max_id;
87 return 0;
88}
89
90struct syscalltbl *syscalltbl__new(void)
91{
92 struct syscalltbl *tbl = malloc(sizeof(*tbl));
93 if (tbl) {
94 if (syscalltbl__init_native(tbl)) {
95 free(tbl);
96 return NULL;
97 }
98 }
99 return tbl;
100}
101
102void syscalltbl__delete(struct syscalltbl *tbl)
103{
104 zfree(&tbl->syscalls.entries);
105 free(tbl);
106}
107
108const char *syscalltbl__name(const struct syscalltbl *tbl __maybe_unused, int id)
109{
110 return id <= syscalltbl_native_max_id ? syscalltbl_native[id]: NULL;
111}
112
113int syscalltbl__id(struct syscalltbl *tbl, const char *name)
114{
115 struct syscall *sc = bsearch(name, tbl->syscalls.entries,
116 tbl->syscalls.nr_entries, sizeof(*sc),
117 syscallcmpname);
118
119 return sc ? sc->id : -1;
120}
121
122int syscalltbl__strglobmatch_next(struct syscalltbl *tbl, const char *syscall_glob, int *idx)
123{
124 int i;
125 struct syscall *syscalls = tbl->syscalls.entries;
126
127 for (i = *idx + 1; i < tbl->syscalls.nr_entries; ++i) {
128 if (strglobmatch(syscalls[i].name, syscall_glob)) {
129 *idx = i;
130 return syscalls[i].id;
131 }
132 }
133
134 return -1;
135}
136
137int syscalltbl__strglobmatch_first(struct syscalltbl *tbl, const char *syscall_glob, int *idx)
138{
139 *idx = -1;
140 return syscalltbl__strglobmatch_next(tbl, syscall_glob, idx);
141}
142
143#else
144
145#include <libaudit.h>
146
147struct syscalltbl *syscalltbl__new(void)
148{
149 struct syscalltbl *tbl = zalloc(sizeof(*tbl));
150 if (tbl)
151 tbl->audit_machine = audit_detect_machine();
152 return tbl;
153}
154
155void syscalltbl__delete(struct syscalltbl *tbl)
156{
157 free(tbl);
158}
159
160const char *syscalltbl__name(const struct syscalltbl *tbl, int id)
161{
162 return audit_syscall_to_name(id, tbl->audit_machine);
163}
164
165int syscalltbl__id(struct syscalltbl *tbl, const char *name)
166{
167 return audit_name_to_syscall(name, tbl->audit_machine);
168}
169
170int syscalltbl__strglobmatch_next(struct syscalltbl *tbl __maybe_unused,
171 const char *syscall_glob __maybe_unused, int *idx __maybe_unused)
172{
173 return -1;
174}
175
176int syscalltbl__strglobmatch_first(struct syscalltbl *tbl, const char *syscall_glob, int *idx)
177{
178 return syscalltbl__strglobmatch_next(tbl, syscall_glob, idx);
179}
180#endif
181
