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- /* Copyright (C) 2001, 2003 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,
- see <http://www.gnu.org/licenses/>. */
- #include <features.h>
- #include <sys/syscall.h>
- #include "sysdep.h"
- #define _ERRNO_H 1
- #include <bits/errno.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. */
- cmpq 0,r10
- beq 1f
- nop
- /* We need to muck with a few registers. */
- subq 8,sp
- movem r1,[sp]
- /* 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
- cmpq 0,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
- #ifdef __arch_v32
- /* Is this the right place for an argument? */
- jsr r0
- move.d r1,r10
- #else
- /* I've told you once. */
- move.d r1,r10
- jsr r0
- #endif
- SETUP_PIC
- PLTCALL (HIDDEN_JUMPTARGET(_exit))
- /* Die horribly. */
- move.d 6809,r13
- test.d [r13]
- /* 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)
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