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.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent fd0db102
...@@ -14,19 +14,103 @@ ...@@ -14,19 +14,103 @@
*/ */
#include "syscalltbl.h" #include "syscalltbl.h"
#include <stdlib.h>
#ifdef HAVE_SYSCALL_TABLE
#include <linux/compiler.h>
#include <string.h> #include <string.h>
#include <libaudit.h> #include "util.h"
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;
return 0;
}
struct syscalltbl *syscalltbl__new(void) struct syscalltbl *syscalltbl__new(void)
{ {
struct syscalltbl *tbl = malloc(sizeof(*tbl)); struct syscalltbl *tbl = malloc(sizeof(*tbl));
if (tbl) { if (tbl) {
tbl->audit_machine = audit_detect_machine(); if (syscalltbl__init_native(tbl)) {
free(tbl);
return NULL;
}
} }
return tbl; 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;
}
#else /* HAVE_SYSCALL_TABLE */
#include <libaudit.h>
struct syscalltbl *syscalltbl__new(void)
{
struct syscalltbl *tbl = malloc(sizeof(*tbl));
if (tbl)
tbl->audit_machine = audit_detect_machine();
return tbl;
}
void syscalltbl__delete(struct syscalltbl *tbl) void syscalltbl__delete(struct syscalltbl *tbl)
{ {
free(tbl); free(tbl);
...@@ -41,3 +125,4 @@ int syscalltbl__id(struct syscalltbl *tbl, const char *name) ...@@ -41,3 +125,4 @@ int syscalltbl__id(struct syscalltbl *tbl, const char *name)
{ {
return audit_name_to_syscall(name, tbl->audit_machine); return audit_name_to_syscall(name, tbl->audit_machine);
} }
#endif /* HAVE_SYSCALL_TABLE */
...@@ -4,6 +4,10 @@ ...@@ -4,6 +4,10 @@
struct syscalltbl { struct syscalltbl {
union { union {
int audit_machine; int audit_machine;
struct {
int nr_entries;
void *entries;
} syscalls;
}; };
}; };
......
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