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180 lines
4.4 KiB
180 lines
4.4 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* System call table mapper |
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* |
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* (C) 2016 Arnaldo Carvalho de Melo <[email protected]> |
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*/ |
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#include "syscalltbl.h" |
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#include <stdlib.h> |
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#include <linux/compiler.h> |
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#include <linux/zalloc.h> |
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#ifdef HAVE_SYSCALL_TABLE_SUPPORT |
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#include <string.h> |
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#include "string2.h" |
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#if defined(__x86_64__) |
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#include <asm/syscalls_64.c> |
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const int syscalltbl_native_max_id = SYSCALLTBL_x86_64_MAX_ID; |
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static const char **syscalltbl_native = syscalltbl_x86_64; |
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#elif defined(__s390x__) |
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#include <asm/syscalls_64.c> |
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const int syscalltbl_native_max_id = SYSCALLTBL_S390_64_MAX_ID; |
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static const char **syscalltbl_native = syscalltbl_s390_64; |
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#elif defined(__powerpc64__) |
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#include <asm/syscalls_64.c> |
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const int syscalltbl_native_max_id = SYSCALLTBL_POWERPC_64_MAX_ID; |
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static const char **syscalltbl_native = syscalltbl_powerpc_64; |
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#elif defined(__powerpc__) |
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#include <asm/syscalls_32.c> |
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const int syscalltbl_native_max_id = SYSCALLTBL_POWERPC_32_MAX_ID; |
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static const char **syscalltbl_native = syscalltbl_powerpc_32; |
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#elif defined(__aarch64__) |
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#include <asm/syscalls.c> |
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const int syscalltbl_native_max_id = SYSCALLTBL_ARM64_MAX_ID; |
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static const char **syscalltbl_native = syscalltbl_arm64; |
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#elif defined(__mips__) |
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#include <asm/syscalls_n64.c> |
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const int syscalltbl_native_max_id = SYSCALLTBL_MIPS_N64_MAX_ID; |
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static const char **syscalltbl_native = syscalltbl_mips_n64; |
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#endif |
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struct syscall { |
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int id; |
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const char *name; |
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}; |
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static int syscallcmpname(const void *vkey, const void *ventry) |
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{ |
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const char *key = vkey; |
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const struct syscall *entry = ventry; |
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return strcmp(key, entry->name); |
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} |
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static int syscallcmp(const void *va, const void *vb) |
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{ |
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const struct syscall *a = va, *b = vb; |
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return strcmp(a->name, b->name); |
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} |
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static int syscalltbl__init_native(struct syscalltbl *tbl) |
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{ |
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int nr_entries = 0, i, j; |
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struct syscall *entries; |
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for (i = 0; i <= syscalltbl_native_max_id; ++i) |
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if (syscalltbl_native[i]) |
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++nr_entries; |
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entries = tbl->syscalls.entries = malloc(sizeof(struct syscall) * nr_entries); |
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if (tbl->syscalls.entries == NULL) |
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return -1; |
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for (i = 0, j = 0; i <= syscalltbl_native_max_id; ++i) { |
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if (syscalltbl_native[i]) { |
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entries[j].name = syscalltbl_native[i]; |
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entries[j].id = i; |
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++j; |
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} |
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} |
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qsort(tbl->syscalls.entries, nr_entries, sizeof(struct syscall), syscallcmp); |
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tbl->syscalls.nr_entries = nr_entries; |
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tbl->syscalls.max_id = syscalltbl_native_max_id; |
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return 0; |
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} |
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struct syscalltbl *syscalltbl__new(void) |
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{ |
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struct syscalltbl *tbl = malloc(sizeof(*tbl)); |
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if (tbl) { |
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if (syscalltbl__init_native(tbl)) { |
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free(tbl); |
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return NULL; |
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} |
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} |
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return tbl; |
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} |
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void syscalltbl__delete(struct syscalltbl *tbl) |
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{ |
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zfree(&tbl->syscalls.entries); |
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free(tbl); |
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} |
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const char *syscalltbl__name(const struct syscalltbl *tbl __maybe_unused, int id) |
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{ |
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return id <= syscalltbl_native_max_id ? syscalltbl_native[id]: NULL; |
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} |
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int syscalltbl__id(struct syscalltbl *tbl, const char *name) |
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{ |
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struct syscall *sc = bsearch(name, tbl->syscalls.entries, |
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tbl->syscalls.nr_entries, sizeof(*sc), |
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syscallcmpname); |
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return sc ? sc->id : -1; |
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} |
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int syscalltbl__strglobmatch_next(struct syscalltbl *tbl, const char *syscall_glob, int *idx) |
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{ |
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int i; |
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struct syscall *syscalls = tbl->syscalls.entries; |
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for (i = *idx + 1; i < tbl->syscalls.nr_entries; ++i) { |
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if (strglobmatch(syscalls[i].name, syscall_glob)) { |
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*idx = i; |
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return syscalls[i].id; |
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} |
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} |
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return -1; |
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} |
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int syscalltbl__strglobmatch_first(struct syscalltbl *tbl, const char *syscall_glob, int *idx) |
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{ |
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*idx = -1; |
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return syscalltbl__strglobmatch_next(tbl, syscall_glob, idx); |
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} |
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#else /* HAVE_SYSCALL_TABLE_SUPPORT */ |
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#include <libaudit.h> |
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struct syscalltbl *syscalltbl__new(void) |
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{ |
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struct syscalltbl *tbl = zalloc(sizeof(*tbl)); |
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if (tbl) |
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tbl->audit_machine = audit_detect_machine(); |
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return tbl; |
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} |
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void syscalltbl__delete(struct syscalltbl *tbl) |
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{ |
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free(tbl); |
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} |
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const char *syscalltbl__name(const struct syscalltbl *tbl, int id) |
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{ |
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return audit_syscall_to_name(id, tbl->audit_machine); |
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} |
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int syscalltbl__id(struct syscalltbl *tbl, const char *name) |
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{ |
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return audit_name_to_syscall(name, tbl->audit_machine); |
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} |
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int syscalltbl__strglobmatch_next(struct syscalltbl *tbl __maybe_unused, |
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const char *syscall_glob __maybe_unused, int *idx __maybe_unused) |
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{ |
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return -1; |
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} |
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int syscalltbl__strglobmatch_first(struct syscalltbl *tbl, const char *syscall_glob, int *idx) |
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{ |
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return syscalltbl__strglobmatch_next(tbl, syscall_glob, idx); |
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} |
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#endif /* HAVE_SYSCALL_TABLE_SUPPORT */
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