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- /* Copyright (C) 1996, 1997, 1998, 2000 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Richard Henderson (rth@tamu.edu).
- 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, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
- /* clone() is even more special than fork() as it mucks with stacks
- and invokes a function in the right context after its all over. */
- #include <asm/errno.h>
- #include <sys/syscall.h>
- #include "NM_Macros.S"
- /* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
- .text
- .align 2
- .globl clone
- .type clone,@function
- clone:
- save %sp,-16
- MOVIP %l0, -EINVAL
- /* sanity check arguments */
- skprnz %i0 /* no NULL function pointers */
- br CLONE_ERROR_LABEL
- mov %o0, %i2
- skprnz %i1 /* no NULL stack pointers */
- br CLONE_ERROR_LABEL
- mov %o1, %i1
- /* Do the system call */
- MOVIP %g1, __NR_clone
- trap 63
- /* if ret >=0? */
- cmpi %o0, 0
- skps cc_pl
- br CLONE_ERROR_LABEL
- mov %l0, %o0
- /* Start thread */
- skprz %o1
- br __thread_start
- nop
- mov %i0, %o0
- ret
- restore
- CLONE_ERROR_LABEL:
- neg %l0
- MOVIA %g1, __errno_location@h
- call %g1
- nop
- st [%o0], %l0 /* store errno */
- xor %i0, %i0
- dec %i0 /* retval=-1 */
- ret
- restore
- .size clone, .-clone
- .type __thread_start,@function
- __thread_start:
- call %i0
- mov %o0, %i3
- MOVIA %g1, _exit@h
- call %g1
- nop
- .size __thread_start, .-__thread_start
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