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/* Copyright (C) 1999, 2000 Free Software Foundation, Inc.
Copyright (C) 2001 Hewlett-Packard Australia
This program 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.
This program 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 this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Derived in part from the Linux-8086 C library, the GNU C Library, and several
other sundry sources. Files within this library are copyright by their
respective copyright holders.
*/
#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. */
.global errno
.text
.align 5
.type __vfork,@function
.globl __vfork;
__vfork:
mov.l @r15+,r3 // pop value from the stack
mov.l .L5,r1
mov.l r3,@r1 // save it in .sav_stack
mov.w .L3, r3
#ifdef HIOS
trapa #0x28
#else
trapa #0x10
#endif
mov r0, r1
// 12 arithmetic shifts for the crappy sh2, because shad doesn't exist!
shar r1
shar r1
shar r1
shar r1
shar r1
shar r1
shar r1
shar r1
shar r1
shar r1
shar r1
shar 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
jmp @r1
mov r0, r4
.align 4
1:
mov.l .L5,r1
mov.l @r1,r3 // get it from .sav_stack
mov.l r3,@-r15 // restore value to the stack
rts
nop
.align 4
2:
.global __syscall_error
__syscall_error:
/* Store it in errno... */
mov.l .L4, r1
mov.l r0, @r1
mov.l .L5,r1
mov.l @r1,r3 // get it from .sav_stack
mov.l r3,@-r15 // restore value to the stack
/* And just kick back a -1. */
rts
mov #-1, r0
.align 4
.L1:
.word -ENOSYS
.L3:
.word 190 //__NR_vfork
.align 4 // Shouldn't be necessary as previously with have two words
.L2:
.long __syscall_error
.L4: .long errno
.L5: .long .sav_stack
.data
.align 4
.sav_stack: //area to temporary save the stach
.long 0
.weak vfork
vfork = __vfork
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