1 // SPDX-License-Identifier: GPL-2.0-only
3 * System call table mapper
5 * (C) 2016 Arnaldo Carvalho de Melo <acme@redhat.com>
8 #include "syscalltbl.h"
10 #include <linux/compiler.h>
11 #include <linux/zalloc.h>
13 #ifdef HAVE_SYSCALL_TABLE_SUPPORT
17 #if defined(__x86_64__)
18 #include <asm/syscalls_64.c>
19 const int syscalltbl_native_max_id = SYSCALLTBL_x86_64_MAX_ID;
20 static const char **syscalltbl_native = syscalltbl_x86_64;
21 #elif defined(__s390x__)
22 #include <asm/syscalls_64.c>
23 const int syscalltbl_native_max_id = SYSCALLTBL_S390_64_MAX_ID;
24 static const char **syscalltbl_native = syscalltbl_s390_64;
25 #elif defined(__powerpc64__)
26 #include <asm/syscalls_64.c>
27 const int syscalltbl_native_max_id = SYSCALLTBL_POWERPC_64_MAX_ID;
28 static const char **syscalltbl_native = syscalltbl_powerpc_64;
29 #elif defined(__powerpc__)
30 #include <asm/syscalls_32.c>
31 const int syscalltbl_native_max_id = SYSCALLTBL_POWERPC_32_MAX_ID;
32 static const char **syscalltbl_native = syscalltbl_powerpc_32;
33 #elif defined(__aarch64__)
34 #include <asm/syscalls.c>
35 const int syscalltbl_native_max_id = SYSCALLTBL_ARM64_MAX_ID;
36 static const char **syscalltbl_native = syscalltbl_arm64;
44 static int syscallcmpname(const void *vkey, const void *ventry)
46 const char *key = vkey;
47 const struct syscall *entry = ventry;
49 return strcmp(key, entry->name);
52 static int syscallcmp(const void *va, const void *vb)
54 const struct syscall *a = va, *b = vb;
56 return strcmp(a->name, b->name);
59 static int syscalltbl__init_native(struct syscalltbl *tbl)
61 int nr_entries = 0, i, j;
62 struct syscall *entries;
64 for (i = 0; i <= syscalltbl_native_max_id; ++i)
65 if (syscalltbl_native[i])
68 entries = tbl->syscalls.entries = malloc(sizeof(struct syscall) * nr_entries);
69 if (tbl->syscalls.entries == NULL)
72 for (i = 0, j = 0; i <= syscalltbl_native_max_id; ++i) {
73 if (syscalltbl_native[i]) {
74 entries[j].name = syscalltbl_native[i];
80 qsort(tbl->syscalls.entries, nr_entries, sizeof(struct syscall), syscallcmp);
81 tbl->syscalls.nr_entries = nr_entries;
82 tbl->syscalls.max_id = syscalltbl_native_max_id;
86 struct syscalltbl *syscalltbl__new(void)
88 struct syscalltbl *tbl = malloc(sizeof(*tbl));
90 if (syscalltbl__init_native(tbl)) {
98 void syscalltbl__delete(struct syscalltbl *tbl)
100 zfree(&tbl->syscalls.entries);
104 const char *syscalltbl__name(const struct syscalltbl *tbl __maybe_unused, int id)
106 return id <= syscalltbl_native_max_id ? syscalltbl_native[id]: NULL;
109 int syscalltbl__id(struct syscalltbl *tbl, const char *name)
111 struct syscall *sc = bsearch(name, tbl->syscalls.entries,
112 tbl->syscalls.nr_entries, sizeof(*sc),
115 return sc ? sc->id : -1;
118 int syscalltbl__strglobmatch_next(struct syscalltbl *tbl, const char *syscall_glob, int *idx)
121 struct syscall *syscalls = tbl->syscalls.entries;
123 for (i = *idx + 1; i < tbl->syscalls.nr_entries; ++i) {
124 if (strglobmatch(syscalls[i].name, syscall_glob)) {
126 return syscalls[i].id;
133 int syscalltbl__strglobmatch_first(struct syscalltbl *tbl, const char *syscall_glob, int *idx)
136 return syscalltbl__strglobmatch_next(tbl, syscall_glob, idx);
139 #else /* HAVE_SYSCALL_TABLE_SUPPORT */
141 #include <libaudit.h>
143 struct syscalltbl *syscalltbl__new(void)
145 struct syscalltbl *tbl = zalloc(sizeof(*tbl));
147 tbl->audit_machine = audit_detect_machine();
151 void syscalltbl__delete(struct syscalltbl *tbl)
156 const char *syscalltbl__name(const struct syscalltbl *tbl, int id)
158 return audit_syscall_to_name(id, tbl->audit_machine);
161 int syscalltbl__id(struct syscalltbl *tbl, const char *name)
163 return audit_name_to_syscall(name, tbl->audit_machine);
166 int syscalltbl__strglobmatch_next(struct syscalltbl *tbl __maybe_unused,
167 const char *syscall_glob __maybe_unused, int *idx __maybe_unused)
172 int syscalltbl__strglobmatch_first(struct syscalltbl *tbl, const char *syscall_glob, int *idx)
174 return syscalltbl__strglobmatch_next(tbl, syscall_glob, idx);
176 #endif /* HAVE_SYSCALL_TABLE_SUPPORT */