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- /* 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
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