mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-30 10:45:40 +03:00
b0af120fd0
* sysdeps/unix/sysv/linux/i386/mmap.S (__mmap): Return -EINVAL even if bits 10 a 11 are non-zero. * sysdeps/unix/sysv/linux/i386/mmap64.S (__mmap64): Likewise.
89 lines
2.1 KiB
ArmAsm
89 lines
2.1 KiB
ArmAsm
/* Copyright (C) 1995, 96, 97, 98, 99, 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>
|
|
|
|
#include "kernel-features.h"
|
|
|
|
#define EINVAL 22
|
|
|
|
.text
|
|
|
|
ENTRY (__mmap)
|
|
|
|
/* I don't think it is worthwhile trzing to use mmap2 whenever it
|
|
is available. Only use it when we are sure the syscall exists. */
|
|
#ifdef __ASSUME_MMAP2_SYSCALL
|
|
|
|
/* Save registers. */
|
|
pushl %ebp
|
|
pushl %ebx
|
|
pushl %esi
|
|
pushl %edi
|
|
|
|
movl 20(%esp), %ebx
|
|
movl 24(%esp), %ecx
|
|
movl 28(%esp), %edx
|
|
movl 32(%esp), %esi
|
|
movl 36(%esp), %edi
|
|
movl 40(%esp), %ebp
|
|
testl $0xfff, %ebp
|
|
movl $-EINVAL, %eax
|
|
jne L(skip)
|
|
shrl $12, %ebp /* mmap2 takes the offset in pages. */
|
|
|
|
movl $SYS_ify(mmap2), %eax /* System call number in %eax. */
|
|
|
|
/* Do the system call trap. */
|
|
int $0x80
|
|
L(skip):
|
|
/* Restore registers. */
|
|
popl %edi
|
|
popl %esi
|
|
popl %ebx
|
|
popl %ebp
|
|
|
|
#else
|
|
|
|
/* Save registers. */
|
|
movl %ebx, %edx
|
|
|
|
movl $SYS_ify(mmap), %eax /* System call number in %eax. */
|
|
|
|
lea 4(%esp), %ebx /* Address of args is 1st arg. */
|
|
|
|
/* Do the system call trap. */
|
|
int $0x80
|
|
|
|
/* Restore registers. */
|
|
movl %edx, %ebx
|
|
|
|
#endif
|
|
|
|
/* If 0 > %eax > -4096 there was an error. */
|
|
cmpl $-4096, %eax
|
|
ja SYSCALL_ERROR_LABEL
|
|
|
|
/* Successful; return the syscall's value. */
|
|
L(pseudo_end):
|
|
ret
|
|
|
|
PSEUDO_END (__mmap)
|
|
|
|
weak_alias (__mmap, mmap)
|