mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-18 19:10:06 +00:00
41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
56 lines
1.8 KiB
ArmAsm
56 lines
1.8 KiB
ArmAsm
/* Copyright (C) 1998, 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 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. */
|
|
|
|
#include <sysdep.h>
|
|
|
|
.text
|
|
|
|
ENTRY (__mmap)
|
|
|
|
/* Because we can only get five args through the syscall interface, and
|
|
mmap() takes six, we need to build a parameter block and pass its
|
|
address instead. The 386 port does a similar trick. */
|
|
|
|
/* This code previously moved sp into ip and stored the args using
|
|
stmdb ip!, {a1-a4}. It did not modify sp, so the stack never had
|
|
to be restored after the syscall completed. It saved an
|
|
instruction and meant no stack cleanup work was required.
|
|
|
|
This will not work in the case of a mmap call being interrupted
|
|
by a signal. If the signal handler uses any stack the arguments
|
|
to mmap will be trashed. The results of a restart of mmap are
|
|
then unpredictable. */
|
|
|
|
/* store args on the stack */
|
|
stmdb sp!, {a1-a4}
|
|
|
|
/* do the syscall */
|
|
mov a1, sp
|
|
swi SYS_ify (mmap)
|
|
|
|
/* pop args off the stack. */
|
|
add sp, sp, #16
|
|
|
|
cmn r0, $4096
|
|
RETINSTR(movcc, pc, lr)
|
|
b PLTJMP(syscall_error);
|
|
|
|
PSEUDO_END (__mmap)
|
|
|
|
weak_alias (__mmap, mmap)
|