Improve perf_event_open argument decoding
* configure.ac (AC_CHECK_HEADERS): Add linux/perf_event.h.
* desc.c [HAVE_LINUX_PERF_EVENT_H]: Include <linux/perf_event.h>.
(perf_event_open_flags): New xlat structure.
(sys_perf_event_open): New function.
* linux/dummy.h (sys_perf_event_open): Remove.
* linux/syscall.h (sys_perf_event_open): New prototype.
Signed-off-by: Ben Noordhuis <info@bnoordhuis.nl>
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
diff --git a/configure.ac b/configure.ac
index f44eaf1..80be383 100644
--- a/configure.ac
+++ b/configure.ac
@@ -196,6 +196,7 @@
ioctls.h
libaio.h
linux/capability.h
+ linux/perf_event.h
linux/ptrace.h
linux/utsname.h
mqueue.h
diff --git a/desc.c b/desc.c
index f0c1890..e75ed4f 100644
--- a/desc.c
+++ b/desc.c
@@ -37,6 +37,9 @@
#ifdef HAVE_LIBAIO_H
# include <libaio.h>
#endif
+#ifdef HAVE_LINUX_PERF_EVENT_H
+# include <linux/perf_event.h>
+#endif
#if HAVE_LONG_LONG_OFF_T
/*
@@ -222,6 +225,19 @@
{ 0, NULL },
};
+static const struct xlat perf_event_open_flags[] = {
+#ifdef PERF_FLAG_FD_NO_GROUP
+ { PERF_FLAG_FD_NO_GROUP, "PERF_FLAG_FD_NO_GROUP" },
+#endif
+#ifdef PERF_FLAG_FD_OUTPUT
+ { PERF_FLAG_FD_OUTPUT, "PERF_FLAG_FD_OUTPUT" },
+#endif
+#ifdef PERF_FLAG_PID_CGROUP
+ { PERF_FLAG_PID_CGROUP, "PERF_FLAG_PID_CGROUP" },
+#endif
+ { 0, NULL },
+};
+
#ifndef HAVE_LONG_LONG_OFF_T
/* fcntl/lockf */
static void
@@ -1068,3 +1084,18 @@
{
return do_eventfd(tcp, 1);
}
+
+int
+sys_perf_event_open(struct tcb *tcp)
+{
+ if (entering(tcp)) {
+ tprintf("%#lx, %d, %d, %d, ",
+ tcp->u_arg[0],
+ (int) tcp->u_arg[1],
+ (int) tcp->u_arg[2],
+ (int) tcp->u_arg[3]);
+ printflags(perf_event_open_flags, tcp->u_arg[4],
+ "PERF_FLAG_???");
+ }
+ return 0;
+}
diff --git a/linux/dummy.h b/linux/dummy.h
index ce340b9..182896e 100644
--- a/linux/dummy.h
+++ b/linux/dummy.h
@@ -39,7 +39,6 @@
#define sys_lookup_dcookie printargs
#define sys_name_to_handle_at printargs
#define sys_open_by_handle_at printargs
-#define sys_perf_event_open printargs
#define sys_request_key printargs
#define sys_sync_file_range printargs
#define sys_sysfs printargs
diff --git a/linux/syscall.h b/linux/syscall.h
index 7e0155e..81b4c69 100644
--- a/linux/syscall.h
+++ b/linux/syscall.h
@@ -163,6 +163,7 @@
int sys_oldstat();
int sys_open();
int sys_openat();
+int sys_perf_event_open();
int sys_personality();
int sys_pipe();
int sys_pipe2();