1 files changed, 74 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/clone.S b/sysdeps/unix/sysv/linux/powerpc/clone.S
new file mode 100644
index 0000000000..e5fa16d8c5
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/powerpc/clone.S
@@ -0,0 +1,74 @@
+/* Wrapper around clone system call.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <sysdep.h>
+#define _ERRNO_H	1
+#include <errnos.h>
+
+/* This is the only really unusual system call in PPC linux, but not
+   because of any weirdness in the system call itself; because of
+   all the freaky stuff we have to do to make the call useful.  */
+
+/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
+
+ENTRY(clone)
+	/* Set up stack frame, save registers.  */
+	stwu 1,-20(1)
+	stw 31,16(1)
+
+	/* Check for child_stack == NULL, fn == NULL.  */
+	mr. 31,4
+	cmpwi 1,3,0
+	cror 2+0*4,2+0*4,2+1*4
+	beq- 0,badargs
+
+	/* Save 'fn' and its argument on the new stack.  */
+	stw 3,0(4)
+	stw 6,4(4)
+
+	/* 'flags' argument is (only) parameter to clone syscall.  */
+	mr 3,5
+
+	/* Do the call.  */
+	DO_CALL(SYS_ify(clone))
+	bso- error
+	beq child
+
+	/* Parent.  Restore registers & return.  */
+	lwz 31,20(1)
+	addi 1,1,20
+	blr
+
+child:
+	/* Get address of procedure to call.  */
+	lwz 0,0(31)
+	/* Set up argument register.  */
+	lwz 3,4(31)
+	mtlr 0
+	/* Switch to new stack.  */
+	mr 1,31
+	/* Call procedure.  */
+	blrl
+	/* Call _exit with result from procedure.  */
+	DO_CALL (SYS_ify (exit))
+
+badargs:
+	li 3,-EINVAL
+error:
+	b __syscall_error