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-rw-r--r--libc/sysdeps/linux/cris/clone.S89
1 files changed, 89 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/cris/clone.S b/libc/sysdeps/linux/cris/clone.S
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index 000000000..56ea05c72
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+++ b/libc/sysdeps/linux/cris/clone.S
@@ -0,0 +1,89 @@
+/* Copyright (C) 2001 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 <asm/errno.h>
+#include <sys/syscall.h>
+#include <sysdep.h>
+
+/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
+
+ .syntax no_register_prefix
+
+ .text
+ENTRY (__clone)
+ /* Sanity check arguments: No NULL function pointers. Allow a NULL
+ stack pointer though; it makes the kernel allocate stack. */
+ test.d r10
+ beq 1f
+ nop
+
+ /* We need to muck with a few registers. */
+ movem r1,[sp=sp-8]
+
+ /* Save the function pointer and argument. We can't save them
+ onto the new stack since it can be NULL. */
+ move.d r10,r0
+ move.d r13,r1
+
+ /* Move the other arguments into place for the system call. */
+ move.d r11,r10
+ move.d r12,r11
+
+ /* Do the system call. */
+ movu.w SYS_ify (clone),r9
+ break 13
+ test.d r10
+ beq .Lthread_start
+ nop
+
+ /* Jump to error handler if we get (unsigned) -4096 .. 0xffffffff. */
+ cmps.w -4096,r10
+ bhs 0f
+ movem [sp+],r1
+
+ /* In parent, successful return. (Avoid using "ret" - it's a macro.) */
+ Ret
+ nop
+
+.Lthread_start:
+ /* Terminate frame pointers here. */
+ moveq 0,r8
+
+ /* I've told you once. */
+ move.d r1,r10
+ jsr r0
+
+ SETUP_PIC
+ PLTCALL (_exit)
+
+ /* Die horribly. */
+ test.d [6809]
+
+ /* Stop the unstoppable. */
+9:
+ ba 9b
+ nop
+
+/* Local error handler. */
+1:
+ movs.w -EINVAL,r10
+ /* Drop through into the ordinary error handler. */
+PSEUDO_END (__clone)
+
+.globl clone
+ clone = __clone