2 * System call table mapper
4 * (C) 2016 Arnaldo Carvalho de Melo <acme@redhat.com>
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.
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
16 #include "syscalltbl.h"
18 #include <linux/compiler.h>
20 #ifdef HAVE_SYSCALL_TABLE_SUPPORT
25 #if defined(__x86_64__)
26 #include <asm/syscalls_64.c>
27 const int syscalltbl_native_max_id = SYSCALLTBL_x86_64_MAX_ID;
28 static const char **syscalltbl_native = syscalltbl_x86_64;
29 #elif defined(__s390x__)
30 #include <asm/syscalls_64.c>
31 const int syscalltbl_native_max_id = SYSCALLTBL_S390_64_MAX_ID;
32 static const char **syscalltbl_native = syscalltbl_s390_64;
33 #elif defined(__powerpc64__)
34 #include <asm/syscalls_64.c>
35 const int syscalltbl_native_max_id = SYSCALLTBL_POWERPC_64_MAX_ID;
36 static const char **syscalltbl_native = syscalltbl_powerpc_64;
37 #elif defined(__powerpc__)
38 #include <asm/syscalls_32.c>
39 const int syscalltbl_native_max_id = SYSCALLTBL_POWERPC_32_MAX_ID;
40 static const char **syscalltbl_native = syscalltbl_powerpc_32;
48 static int syscallcmpname(const void *vkey, const void *ventry)
50 const char *key = vkey;
51 const struct syscall *entry = ventry;
53 return strcmp(key, entry->name);
56 static int syscallcmp(const void *va, const void *vb)
58 const struct syscall *a = va, *b = vb;
60 return strcmp(a->name, b->name);
63 static int syscalltbl__init_native(struct syscalltbl *tbl)
65 int nr_entries = 0, i, j;
66 struct syscall *entries;
68 for (i = 0; i <= syscalltbl_native_max_id; ++i)
69 if (syscalltbl_native[i])
72 entries = tbl->syscalls.entries = malloc(sizeof(struct syscall) * nr_entries);
73 if (tbl->syscalls.entries == NULL)
76 for (i = 0, j = 0; i <= syscalltbl_native_max_id; ++i) {
77 if (syscalltbl_native[i]) {
78 entries[j].name = syscalltbl_native[i];
84 qsort(tbl->syscalls.entries, nr_entries, sizeof(struct syscall), syscallcmp);
85 tbl->syscalls.nr_entries = nr_entries;
89 struct syscalltbl *syscalltbl__new(void)
91 struct syscalltbl *tbl = malloc(sizeof(*tbl));
93 if (syscalltbl__init_native(tbl)) {
101 void syscalltbl__delete(struct syscalltbl *tbl)
103 zfree(&tbl->syscalls.entries);
107 const char *syscalltbl__name(const struct syscalltbl *tbl __maybe_unused, int id)
109 return id <= syscalltbl_native_max_id ? syscalltbl_native[id]: NULL;
112 int syscalltbl__id(struct syscalltbl *tbl, const char *name)
114 struct syscall *sc = bsearch(name, tbl->syscalls.entries,
115 tbl->syscalls.nr_entries, sizeof(*sc),
118 return sc ? sc->id : -1;
121 int syscalltbl__strglobmatch_next(struct syscalltbl *tbl, const char *syscall_glob, int *idx)
124 struct syscall *syscalls = tbl->syscalls.entries;
126 for (i = *idx + 1; i < tbl->syscalls.nr_entries; ++i) {
127 if (strglobmatch(syscalls[i].name, syscall_glob)) {
129 return syscalls[i].id;
136 int syscalltbl__strglobmatch_first(struct syscalltbl *tbl, const char *syscall_glob, int *idx)
139 return syscalltbl__strglobmatch_next(tbl, syscall_glob, idx);
142 #else /* HAVE_SYSCALL_TABLE_SUPPORT */
144 #include <libaudit.h>
146 struct syscalltbl *syscalltbl__new(void)
148 struct syscalltbl *tbl = malloc(sizeof(*tbl));
150 tbl->audit_machine = audit_detect_machine();
154 void syscalltbl__delete(struct syscalltbl *tbl)
159 const char *syscalltbl__name(const struct syscalltbl *tbl, int id)
161 return audit_syscall_to_name(id, tbl->audit_machine);
164 int syscalltbl__id(struct syscalltbl *tbl, const char *name)
166 return audit_name_to_syscall(name, tbl->audit_machine);
169 int syscalltbl__strglobmatch_next(struct syscalltbl *tbl __maybe_unused,
170 const char *syscall_glob __maybe_unused, int *idx __maybe_unused)
175 int syscalltbl__strglobmatch_first(struct syscalltbl *tbl, const char *syscall_glob, int *idx)
177 return syscalltbl__strglobmatch_next(tbl, syscall_glob, idx);
179 #endif /* HAVE_SYSCALL_TABLE_SUPPORT */