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/* Copyright (C) 1999, 2000 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 <sysdep.h>
#define _ERRNO_H 1
#include <bits/errno.h>
/* Clone the calling process, but without copying the whole address space.
The calling process is suspended until the new process exits or is
replaced by a call to `execve'. Return -1 for errors, 0 to the new process,
and the process ID of the new process to the old process. */
ENTRY (__vfork)
#ifdef __NR_vfork
mov.w .L3, r3
trapa #0x10
mov r0, r1
mov #-12, r2
shad r2, r1
not r1, r1 // r1=0 means r0 = -1 to -4095
tst r1, r1 // i.e. error in linux
bf 1f
mov.w .L1, r1
cmp/eq r1, r0
bt 2f
mov.l .L2, r1
#ifdef SHARED
mov r0, r4
mov.l r12, @-r15
sts.l pr, @-r15
mov.l 0f, r12
mova 0f, r0
add r0, r12
mova .L2, r0
add r0, r1
jsr @r1
nop
lds.l @r15+, pr
rts
mov.l @r15+, r12
.align 2
0:
.long _GLOBAL_OFFSET_TABLE_
#else
jmp @r1
mov r0, r4
#endif
.L1:
.word -ENOSYS
.L3: .word __NR_vfork
1:
rts
nop
2:
#endif
/* If we don't have vfork, fork is close enough. */
mov #+__NR_fork, r3
trapa #0x10
mov r0, r1
mov #-12, r2
shad r2, r1
not r1, r1 // r1=0 means r0 = -1 to -4095
tst r1, r1 // i.e. error in linux
bf 1f
mov.l .L2, r1
#ifdef SHARED
mov r0, r4
mov.l r12, @-r15
sts.l pr, @-r15
mov.l 0f, r12
mova 0f, r0
add r0, r12
mova .L2, r0
add r0, r1
jsr @r1
nop
lds.l @r15+, pr
rts
mov.l @r15+, r12
.align 2
0:
.long _GLOBAL_OFFSET_TABLE_
#else
jmp @r1
mov r0, r4
#endif
.align 2
.L2:
.long PLTJMP(C_SYMBOL_NAME(__syscall_error))
1:
rts
nop
PSEUDO_END (__vfork)
weak_alias (__vfork, vfork)
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