perf tools: Allow generating per-arch syscall table arrays
Tools should use a mechanism similar to arch/x86/entry/syscalls/ to generate a header file with the definitions for two variables: static const char *syscalltbl_x86_64[] = { [0] = "read", [1] = "write", <SNIP> [324] = "membarrier", [325] = "mlock2", [326] = "copy_file_range", }; static const int syscalltbl_x86_64_max_id = 326; In a per arch file that should then be included in tools/perf/util/syscalltbl.c. First one will be for x86_64. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-02uuamkxgccczdth8komspgp@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -14,19 +14,103 @@
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*/
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#include "syscalltbl.h"
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#include <string.h>
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#include <libaudit.h>
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#include <stdlib.h>
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#ifdef HAVE_SYSCALL_TABLE
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#include <linux/compiler.h>
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#include <string.h>
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#include "util.h"
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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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tbl->audit_machine = audit_detect_machine();
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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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#else /* HAVE_SYSCALL_TABLE */
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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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@ -41,3 +125,4 @@ 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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#endif /* HAVE_SYSCALL_TABLE */
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@ -4,6 +4,10 @@
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struct syscalltbl {
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union {
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int audit_machine;
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struct {
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int nr_entries;
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void *entries;
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} syscalls;
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};
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};
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