mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-24 13:33:08 +03:00
688903eb3e
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
110 lines
2.9 KiB
ArmAsm
110 lines
2.9 KiB
ArmAsm
/* Copyright (C) 1996-2018 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Andreas Schwab (schwab@issan.informatik.uni-dortmund.de)
|
|
|
|
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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
/* 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 <sysdep.h>
|
|
#define _ERRNO_H 1
|
|
#include <bits/errno.h>
|
|
#include <tls.h>
|
|
|
|
/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg,
|
|
void *parent_tidptr, void *tls, void *child_tidptr) */
|
|
|
|
.text
|
|
ENTRY (__clone)
|
|
|
|
/* Sanity check arguments. */
|
|
movel #-EINVAL, %d0
|
|
movel 4(%sp), %a0 /* no NULL function pointers */
|
|
tstl %a0
|
|
jeq SYSCALL_ERROR_LABEL
|
|
movel 8(%sp), %a1 /* no NULL stack pointers */
|
|
tstl %a1
|
|
jeq SYSCALL_ERROR_LABEL
|
|
|
|
/* Allocate space and copy the argument onto the new stack. */
|
|
movel 16(%sp), -(%a1)
|
|
|
|
/* Do the system call */
|
|
movel 12+0(%sp), %d1 /* get flags */
|
|
movel %d3, -(%a1) /* save %d3 and get parent_tidptr */
|
|
movel %d3, -(%sp)
|
|
cfi_adjust_cfa_offset (4)
|
|
cfi_rel_offset (%d3, 0)
|
|
movel 20+4(%sp), %d3
|
|
movel %d4, -(%a1) /* save %d4 and get child_tidptr */
|
|
movel %d4, -(%sp)
|
|
cfi_adjust_cfa_offset (4)
|
|
cfi_rel_offset (%d4, 0)
|
|
movel 28+8(%sp), %d4
|
|
movel %d5, -(%a1) /* save %d5 and get tls */
|
|
movel %d5, -(%sp)
|
|
cfi_adjust_cfa_offset (4)
|
|
cfi_rel_offset (%d5, 0)
|
|
movel 24+12(%sp), %d5
|
|
/* save %d2 and get stack pointer */
|
|
#ifdef __mcoldfire__
|
|
movel %d2, -(%a1)
|
|
movel %d2, -(%sp)
|
|
cfi_adjust_cfa_offset (4)
|
|
cfi_rel_offset (%d2, 0)
|
|
movel %a1, %d2
|
|
#else
|
|
exg %d2, %a1 /* save %d2 and get stack pointer */
|
|
cfi_register (%d2, %a1)
|
|
#endif
|
|
movel #SYS_ify (clone), %d0
|
|
|
|
/* End FDE now, because in the child the unwind info will be
|
|
wrong. */
|
|
cfi_endproc
|
|
|
|
trap #0
|
|
#ifdef __mcoldfire__
|
|
movel (%sp)+, %d2
|
|
#else
|
|
exg %d2, %a1 /* restore %d2 */
|
|
#endif
|
|
movel (%sp)+, %d5 /* restore %d5, %d4 and %d3 */
|
|
movel (%sp)+, %d4
|
|
movel (%sp)+, %d3
|
|
|
|
tstl %d0
|
|
jmi SYSCALL_ERROR_LABEL
|
|
jeq 1f
|
|
|
|
rts
|
|
|
|
1:
|
|
cfi_startproc
|
|
cfi_undefined (pc) /* Mark end of stack */
|
|
subl %fp, %fp /* terminate the stack frame */
|
|
jsr (%a0)
|
|
movel %d0, %d1
|
|
movel #SYS_ify (exit), %d0
|
|
trap #0
|
|
cfi_endproc
|
|
|
|
cfi_startproc
|
|
PSEUDO_END (__clone)
|
|
|
|
libc_hidden_def (__clone)
|
|
weak_alias (__clone, clone)
|