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Diffstat (limited to '')
| -rw-r--r-- | tools/perf/util/syscalltbl.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/tools/perf/util/syscalltbl.c b/tools/perf/util/syscalltbl.c new file mode 100644 index 000000000..a2e906858 --- /dev/null +++ b/tools/perf/util/syscalltbl.c @@ -0,0 +1,180 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * System call table mapper + * + * (C) 2016 Arnaldo Carvalho de Melo <acme@redhat.com> + */ + +#include "syscalltbl.h" +#include <stdlib.h> +#include <linux/compiler.h> +#include <linux/zalloc.h> + +#ifdef HAVE_SYSCALL_TABLE_SUPPORT +#include <string.h> +#include "string2.h" + +#if defined(__x86_64__) +#include <asm/syscalls_64.c> +const int syscalltbl_native_max_id = SYSCALLTBL_x86_64_MAX_ID; +static const char **syscalltbl_native = syscalltbl_x86_64; +#elif defined(__s390x__) +#include <asm/syscalls_64.c> +const int syscalltbl_native_max_id = SYSCALLTBL_S390_64_MAX_ID; +static const char **syscalltbl_native = syscalltbl_s390_64; +#elif defined(__powerpc64__) +#include <asm/syscalls_64.c> +const int syscalltbl_native_max_id = SYSCALLTBL_POWERPC_64_MAX_ID; +static const char **syscalltbl_native = syscalltbl_powerpc_64; +#elif defined(__powerpc__) +#include <asm/syscalls_32.c> +const int syscalltbl_native_max_id = SYSCALLTBL_POWERPC_32_MAX_ID; +static const char **syscalltbl_native = syscalltbl_powerpc_32; +#elif defined(__aarch64__) +#include <asm/syscalls.c> +const int syscalltbl_native_max_id = SYSCALLTBL_ARM64_MAX_ID; +static const char **syscalltbl_native = syscalltbl_arm64; +#elif defined(__mips__) +#include <asm/syscalls_n64.c> +const int syscalltbl_native_max_id = SYSCALLTBL_MIPS_N64_MAX_ID; +static const char **syscalltbl_native = syscalltbl_mips_n64; +#endif + +struct syscall { + int id; + const char *name; +}; + +static int syscallcmpname(const void *vkey, const void *ventry) +{ + const char *key = vkey; + const struct syscall *entry = ventry; + + return strcmp(key, entry->name); +} + +static int syscallcmp(const void *va, const void *vb) +{ + const struct syscall *a = va, *b = vb; + + return strcmp(a->name, b->name); +} + +static int syscalltbl__init_native(struct syscalltbl *tbl) +{ + int nr_entries = 0, i, j; + struct syscall *entries; + + for (i = 0; i <= syscalltbl_native_max_id; ++i) + if (syscalltbl_native[i]) + ++nr_entries; + + entries = tbl->syscalls.entries = malloc(sizeof(struct syscall) * nr_entries); + if (tbl->syscalls.entries == NULL) + return -1; + + for (i = 0, j = 0; i <= syscalltbl_native_max_id; ++i) { + if (syscalltbl_native[i]) { + entries[j].name = syscalltbl_native[i]; + entries[j].id = i; + ++j; + } + } + + qsort(tbl->syscalls.entries, nr_entries, sizeof(struct syscall), syscallcmp); + tbl->syscalls.nr_entries = nr_entries; + tbl->syscalls.max_id = syscalltbl_native_max_id; + return 0; +} + +struct syscalltbl *syscalltbl__new(void) +{ + struct syscalltbl *tbl = malloc(sizeof(*tbl)); + if (tbl) { + if (syscalltbl__init_native(tbl)) { + free(tbl); + return NULL; + } + } + return tbl; +} + +void syscalltbl__delete(struct syscalltbl *tbl) +{ + zfree(&tbl->syscalls.entries); + free(tbl); +} + +const char *syscalltbl__name(const struct syscalltbl *tbl __maybe_unused, int id) +{ + return id <= syscalltbl_native_max_id ? syscalltbl_native[id]: NULL; +} + +int syscalltbl__id(struct syscalltbl *tbl, const char *name) +{ + struct syscall *sc = bsearch(name, tbl->syscalls.entries, + tbl->syscalls.nr_entries, sizeof(*sc), + syscallcmpname); + + return sc ? sc->id : -1; +} + +int syscalltbl__strglobmatch_next(struct syscalltbl *tbl, const char *syscall_glob, int *idx) +{ + int i; + struct syscall *syscalls = tbl->syscalls.entries; + + for (i = *idx + 1; i < tbl->syscalls.nr_entries; ++i) { + if (strglobmatch(syscalls[i].name, syscall_glob)) { + *idx = i; + return syscalls[i].id; + } + } + + return -1; +} + +int syscalltbl__strglobmatch_first(struct syscalltbl *tbl, const char *syscall_glob, int *idx) +{ + *idx = -1; + return syscalltbl__strglobmatch_next(tbl, syscall_glob, idx); +} + +#else /* HAVE_SYSCALL_TABLE_SUPPORT */ + +#include <libaudit.h> + +struct syscalltbl *syscalltbl__new(void) +{ + struct syscalltbl *tbl = zalloc(sizeof(*tbl)); + if (tbl) + tbl->audit_machine = audit_detect_machine(); + return tbl; +} + +void syscalltbl__delete(struct syscalltbl *tbl) +{ + free(tbl); +} + +const char *syscalltbl__name(const struct syscalltbl *tbl, int id) +{ + return audit_syscall_to_name(id, tbl->audit_machine); +} + +int syscalltbl__id(struct syscalltbl *tbl, const char *name) +{ + return audit_name_to_syscall(name, tbl->audit_machine); +} + +int syscalltbl__strglobmatch_next(struct syscalltbl *tbl __maybe_unused, + const char *syscall_glob __maybe_unused, int *idx __maybe_unused) +{ + return -1; +} + +int syscalltbl__strglobmatch_first(struct syscalltbl *tbl, const char *syscall_glob, int *idx) +{ + return syscalltbl__strglobmatch_next(tbl, syscall_glob, idx); +} +#endif /* HAVE_SYSCALL_TABLE_SUPPORT */ |