[RFC PATCH 22/38] fork: prefer clone syscall
Jonas Bonn
jonas at southpole.se
Tue Sep 6 08:30:46 UTC 2011
Signed-off-by: Jonas Bonn <jonas at southpole.se>
---
libc/sysdeps/linux/common/fork.c | 19 ++++++++++++++++++-
1 files changed, 18 insertions(+), 1 deletions(-)
diff --git a/libc/sysdeps/linux/common/fork.c b/libc/sysdeps/linux/common/fork.c
index 14e00a2..64c6d42 100644
--- a/libc/sysdeps/linux/common/fork.c
+++ b/libc/sysdeps/linux/common/fork.c
@@ -9,10 +9,27 @@
#include <sys/syscall.h>
#include <unistd.h>
+#include <signal.h>
#ifdef __ARCH_USE_MMU__
-#ifdef __NR_fork
+#ifdef __NR_clone
+pid_t __libc_fork(void)
+{
+ pid_t pid;
+ pid = INLINE_SYSCALL(clone, 4, SIGCHLD, NULL, NULL, NULL);
+
+ if (pid < 0) {
+ __set_errno (-pid);
+ return -1;
+ }
+
+ return pid;
+}
+weak_alias(__libc_fork,fork)
+libc_hidden_weak(fork)
+
+#elif defined __NR_fork
#define __NR___libc_fork __NR_fork
extern __typeof(fork) __libc_fork;
_syscall0(pid_t, __libc_fork)
--
1.7.5.4
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