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- /* Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
- 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. */
- /* 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 <features.h>
- #include <bits/errno.h>
- #include <sys/syscall.h>
- #warning "This file contains a hardcoded constant for SYS_clone"
- .section .rodata
- .align 2
- .LC0: .long 120 /* SYS_clone */
- .align 4
- .text
- .type clone,@function
- .globl clone;
- clone:
- .word 0x0040
- /* subl2 $8, %sp */
- movl 4(%ap), %r1
- movl 8(%ap), %r0
- mcoml $21, %r6
- /* Sanity check args. */
- tstl %r1
- jeql CLONE_ERROR_LABEL
- tstl %r0
- jeql CLONE_ERROR_LABEL
- /* Need to setup the child stack the same as the parent. */
- subl2 $24, %r0
- movl 16(%ap), 20(%r0)
- movl %r1, 16(%r0)
- movl %r0, %r1
- addl2 $16, %r1
- movl %r1, 12(%r0)
- /* Do the system call. */
- pushl %ap
- pushl %r0
- pushl 12(%ap)
- pushl $0x2
- movl %sp, %ap
- chmk .LC0 /* %r0 .LC0 -4(%fp) -8(%fp) */
- addl2 $12, %sp
- movl (%sp)+, %ap
- movl %r0, %r6
- jneq CLONE_ERROR_LABEL
- movl $0, %fp
- pushl 4(%ap)
- movl (%r1), %r0
- calls $1, (%r0)
- pushl %r0
- calls $1, HIDDEN_JUMPTARGET(_exit)
- CLONE_ERROR_LABEL:
- cmpl %r6, $-126 /* -ENOKEY?!?! Fuck, this must be wrong! FIXME */
- jlequ CLONE_RETURN_LABEL
- calls $0, __errno_location
- mnegl %r6, (%r0)
- mcoml $0, %r6
- movl %r6, %r0
- ret
- CLONE_RETURN_LABEL:
- ret
- .size clone,.-clone
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