tools/perf/util/syscalltbl.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * System call table mapper
   4  *
   5  * (C) 2016 Arnaldo Carvalho de Melo <acme@redhat.com>
   6  */
   7
   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>
  19 const int syscalltbl_native_max_id = SYSCALLTBL_x86_64_MAX_ID;
  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 = SYSCALLTBL_x86_MAX_ID;
  24 static const char *const *syscalltbl_native = syscalltbl_x86;
  25 #elif defined(__s390x__)
  26 #include <asm/syscalls_64.c>
  27 const int syscalltbl_native_max_id = SYSCALLTBL_S390_64_MAX_ID;
  28 static const char *const *syscalltbl_native = syscalltbl_s390_64;
  29 #elif defined(__powerpc64__)
  30 #include <asm/syscalls_64.c>
  31 const int syscalltbl_native_max_id = SYSCALLTBL_POWERPC_64_MAX_ID;
  32 static const char *const *syscalltbl_native = syscalltbl_powerpc_64;
  33 #elif defined(__powerpc__)
  34 #include <asm/syscalls_32.c>
  35 const int syscalltbl_native_max_id = SYSCALLTBL_POWERPC_32_MAX_ID;
  36 static const char *const *syscalltbl_native = syscalltbl_powerpc_32;
  37 #elif defined(__aarch64__)
  38 #include <asm/syscalls.c>
  39 const int syscalltbl_native_max_id = SYSCALLTBL_ARM64_MAX_ID;
  40 static const char *const *syscalltbl_native = syscalltbl_arm64;
  41 #elif defined(__mips__)
  42 #include <asm/syscalls_n64.c>
  43 const int syscalltbl_native_max_id = SYSCALLTBL_MIPS_N64_MAX_ID;
  44 static const char *const *syscalltbl_native = syscalltbl_mips_n64;
  45 #elif defined(__loongarch__)
  46 #include <asm/syscalls.c>
  47 const int syscalltbl_native_max_id = SYSCALLTBL_LOONGARCH_MAX_ID;
  48 static const char *const *syscalltbl_native = syscalltbl_loongarch;
  49 #elif defined(__riscv)
  50 #include <asm/syscalls.c>
  51 const int syscalltbl_native_max_id = SYSCALLTBL_RISCV_MAX_ID;
  52 static const char *const *syscalltbl_native = syscalltbl_riscv;
  53 #else
  54 const int syscalltbl_native_max_id = 0;
  55 static const char *const syscalltbl_native[] = {
  56         [0] = "unknown",
  57 };
  58 #endif
  59
  60 struct syscall {
  61         int id;
  62         const char *name;
  63 };
  64
  65 static int syscallcmpname(const void *vkey, const void *ventry)
  66 {
  67         const char *key = vkey;
  68         const struct syscall *entry = ventry;
  69
  70         return strcmp(key, entry->name);
  71 }
  72
  73 static int syscallcmp(const void *va, const void *vb)
  74 {
  75         const struct syscall *a = va, *b = vb;
  76
  77         return strcmp(a->name, b->name);
  78 }
  79
  80 static int syscalltbl__init_native(struct syscalltbl *tbl)
  81 {
  82         int nr_entries = 0, i, j;
  83         struct syscall *entries;
  84
  85         for (i = 0; i <= syscalltbl_native_max_id; ++i)
  86                 if (syscalltbl_native[i])
  87                         ++nr_entries;
  88
  89         entries = tbl->syscalls.entries = malloc(sizeof(struct syscall) * nr_entries);
  90         if (tbl->syscalls.entries == NULL)
  91                 return -1;
  92
  93         for (i = 0, j = 0; i <= syscalltbl_native_max_id; ++i) {
  94                 if (syscalltbl_native[i]) {
  95                         entries[j].name = syscalltbl_native[i];
  96                         entries[j].id = i;
  97                         ++j;
  98                 }
  99         }
 100
 101         qsort(tbl->syscalls.entries, nr_entries, sizeof(struct syscall), syscallcmp);
 102         tbl->syscalls.nr_entries = nr_entries;
 103         tbl->syscalls.max_id     = syscalltbl_native_max_id;
 104         return 0;
 105 }
 106
 107 struct syscalltbl *syscalltbl__new(void)
 108 {
 109         struct syscalltbl *tbl = malloc(sizeof(*tbl));
 110         if (tbl) {
 111                 if (syscalltbl__init_native(tbl)) {
 112                         free(tbl);
 113                         return NULL;
 114                 }
 115         }
 116         return tbl;
 117 }
 118
 119 void syscalltbl__delete(struct syscalltbl *tbl)
 120 {
 121         zfree(&tbl->syscalls.entries);
 122         free(tbl);
 123 }
 124
 125 const char *syscalltbl__name(const struct syscalltbl *tbl __maybe_unused, int id)
 126 {
 127         return id <= syscalltbl_native_max_id ? syscalltbl_native[id]: NULL;
 128 }
 129
 130 int syscalltbl__id(struct syscalltbl *tbl, const char *name)
 131 {
 132         struct syscall *sc = bsearch(name, tbl->syscalls.entries,
 133                                      tbl->syscalls.nr_entries, sizeof(*sc),
 134                                      syscallcmpname);
 135
 136         return sc ? sc->id : -1;
 137 }
 138
 139 int syscalltbl__id_at_idx(struct syscalltbl *tbl, int idx)
 140 {
 141         struct syscall *syscalls = tbl->syscalls.entries;
 142
 143         return idx < tbl->syscalls.nr_entries ? syscalls[idx].id : -1;
 144 }
 145
 146 int syscalltbl__strglobmatch_next(struct syscalltbl *tbl, const char *syscall_glob, int *idx)
 147 {
 148         int i;
 149         struct syscall *syscalls = tbl->syscalls.entries;
 150
 151         for (i = *idx + 1; i < tbl->syscalls.nr_entries; ++i) {
 152                 if (strglobmatch(syscalls[i].name, syscall_glob)) {
 153                         *idx = i;
 154                         return syscalls[i].id;
 155                 }
 156         }
 157
 158         return -1;
 159 }
 160
 161 int syscalltbl__strglobmatch_first(struct syscalltbl *tbl, const char *syscall_glob, int *idx)
 162 {
 163         *idx = -1;
 164         return syscalltbl__strglobmatch_next(tbl, syscall_glob, idx);
 165 }
 166
 167 #else /* HAVE_SYSCALL_TABLE_SUPPORT */
 168
 169 #include <libaudit.h>
 170
 171 struct syscalltbl *syscalltbl__new(void)
 172 {
 173         struct syscalltbl *tbl = zalloc(sizeof(*tbl));
 174         if (tbl)
 175                 tbl->audit_machine = audit_detect_machine();
 176         return tbl;
 177 }
 178
 179 void syscalltbl__delete(struct syscalltbl *tbl)
 180 {
 181         free(tbl);
 182 }
 183
 184 const char *syscalltbl__name(const struct syscalltbl *tbl, int id)
 185 {
 186         return audit_syscall_to_name(id, tbl->audit_machine);
 187 }
 188
 189 int syscalltbl__id(struct syscalltbl *tbl, const char *name)
 190 {
 191         return audit_name_to_syscall(name, tbl->audit_machine);
 192 }
 193
 194 int syscalltbl__id_at_idx(struct syscalltbl *tbl __maybe_unused, int idx)
 195 {
 196         return idx;
 197 }
 198
 199 int syscalltbl__strglobmatch_next(struct syscalltbl *tbl __maybe_unused,
 200                                   const char *syscall_glob __maybe_unused, int *idx __maybe_unused)
 201 {
 202         return -1;
 203 }
 204
 205 int syscalltbl__strglobmatch_first(struct syscalltbl *tbl, const char *syscall_glob, int *idx)
 206 {
 207         return syscalltbl__strglobmatch_next(tbl, syscall_glob, idx);
 208 }
 209 #endif /* HAVE_SYSCALL_TABLE_SUPPORT */