summaryrefslogtreecommitdiff
path: root/libc/sysdeps/linux/tile/vfork.S
diff options
context:
space:
mode:
authorWaldemar Brodkorb <wbx@uclibc-ng.org>2018-02-04 15:34:18 +0000
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2018-03-12 20:11:14 +0100
commit490e84f5e146485a26dea2f41279a4ff13aaca05 (patch)
tree03b9eab7297c5ad571b548b5ed916f17be78bf48 /libc/sysdeps/linux/tile/vfork.S
parent6e627523ee4b3fc00c30dcff74c2adf93e2b6840 (diff)
tile: add basic support for tilegx
This adds basic support for tile architecture. Only static binaries, no ld.so or threading support. Tested with qemu-tilegx only.
Diffstat (limited to 'libc/sysdeps/linux/tile/vfork.S')
-rw-r--r--libc/sysdeps/linux/tile/vfork.S45
1 files changed, 45 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/tile/vfork.S b/libc/sysdeps/linux/tile/vfork.S
new file mode 100644
index 000000000..ab104a0c1
--- /dev/null
+++ b/libc/sysdeps/linux/tile/vfork.S
@@ -0,0 +1,45 @@
+/* Copyright (C) 2011-2018 Free Software Foundation, Inc.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <sysdep.h>
+#define __ASSEMBLY__ /* for kernel headers */
+#include <linux/sched.h>
+#include <asm/signal.h>
+
+/* Clone the calling process, but without copying the whole address space.
+ The calling process is suspended until the new process exits or is
+ replaced by a call to `execve'. Return -1 for errors, 0 to the new process,
+ and the process ID of the new process to the old process. */
+
+ .text
+ENTRY (__vfork)
+ {
+ moveli r0, CLONE_VFORK | CLONE_VM | SIGCHLD
+ move r1, zero
+ }
+ {
+ move r2, zero
+ move r3, zero
+ }
+ moveli TREG_SYSCALL_NR_NAME, __NR_clone
+ swint1
+
+ bnez r1, 0f
+ jrp lr
+PSEUDO_END (__vfork)
+libc_hidden_def (vfork)
+
+weak_alias (__vfork, vfork)