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![Kim Phillips](/assets/img/avatar_default.png)
This should speed up accessing new system calls introduced with the kernel rather than waiting for libaudit updates to include them. It also enables users to specify wildcards, for example, perf trace -e 'open*', just like was already possible on x86, s390, and powerpc, which means arm64 can now pass the "Check open filename arg using perf trace + vfs_getname" test. Signed-off-by: Kim Phillips <kim.phillips@arm.com> Reviewed-by: Hendrik Brueckner <brueckner@linux.ibm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Cc: Thomas Richter <tmricht@linux.vnet.ibm.com> Link: http://lkml.kernel.org/r/20180706163454.f714b9ab49ecc8566a0b3565@arm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
183 lines
4.6 KiB
C
183 lines
4.6 KiB
C
/*
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* System call table mapper
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*
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* (C) 2016 Arnaldo Carvalho de Melo <acme@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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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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#ifdef HAVE_SYSCALL_TABLE_SUPPORT
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#include <string.h>
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#include "string2.h"
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#include "util.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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#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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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 = malloc(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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