mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-15 17:40:06 +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.
92 lines
2.5 KiB
ArmAsm
92 lines
2.5 KiB
ArmAsm
/* Copyright (C) 2001 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>
|
|
|
|
#include "kernel-features.h"
|
|
|
|
#include <asm/errno.h>
|
|
|
|
/* Rather than dragging in yet another kernel file, <asm/page.h>, we
|
|
define it here. Provide for easy override. */
|
|
#ifndef PAGE_SHIFT
|
|
#define PAGE_SHIFT 13
|
|
#endif
|
|
|
|
/* This is: __ptr_t
|
|
__mmap64 (__ptr_t addr, size_t len, int prot, int flags, int fd,
|
|
off64_t offset); */
|
|
|
|
/* This was done in C, but the resulting code didn't look anywhere near
|
|
nice, and mmap64 is important enough to have fast code. Rather than
|
|
fixing (the generic bits in) gcc, we make sure not to depend on it by
|
|
writing code that GCC cannot reasonably generate. */
|
|
|
|
.syntax no_register_prefix
|
|
|
|
ENTRY (__mmap64)
|
|
|
|
move [sp],mof
|
|
move.d [sp+4],r9
|
|
|
|
/* Only accept an offset being a multiple of PAGE_SIZE, ditto address. */
|
|
btstq (PAGE_SHIFT - 1),r9
|
|
bne 1f
|
|
lsrq PAGE_SHIFT,r9
|
|
|
|
btstq (PAGE_SHIFT - 1),r10
|
|
bne 1f
|
|
move.d r9,[sp]
|
|
|
|
/* We have to store the adjusted part somewhere we can "or" from.
|
|
No registers available, so let's re-use the incoming low-part
|
|
parameter location. */
|
|
move.d [sp+8],r9
|
|
|
|
swapwbr r9
|
|
/* Check if the highest bits (now the lowest bits) are zero. They
|
|
must be, since we're actually calling a system function
|
|
specifying the size in *pages* in a single dword. Thus you can
|
|
mmap64 PAGE_SIZE * 4 Gbyte. */
|
|
btstq (PAGE_SHIFT - 1),r9
|
|
bne 1f
|
|
swapwbr r9
|
|
|
|
lslq (32 - PAGE_SHIFT),r9
|
|
or.d [sp],r9
|
|
move srp,[sp]
|
|
move r9,srp
|
|
|
|
movu.b SYS_ify (mmap2),r9
|
|
break 13
|
|
|
|
cmps.w -4096,r10
|
|
bhs 0f
|
|
move [sp],srp
|
|
|
|
Ret
|
|
nop
|
|
|
|
/* Local error handler. */
|
|
1:
|
|
movs.w -EINVAL,r10
|
|
/* Drop through into the ordinary error handler. */
|
|
PSEUDO_END (__mmap64)
|
|
|
|
weak_alias (__mmap64, mmap64)
|