mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-14 01:00:07 +00:00
80 lines
1.9 KiB
ArmAsm
80 lines
1.9 KiB
ArmAsm
/* Copyright (C) 1995-2015 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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <sysdep.h>
|
|
|
|
#define EINVAL 22
|
|
|
|
.text
|
|
|
|
ENTRY (__mmap)
|
|
|
|
/* Save registers. */
|
|
pushl %ebp
|
|
cfi_adjust_cfa_offset (4)
|
|
pushl %ebx
|
|
cfi_adjust_cfa_offset (4)
|
|
pushl %esi
|
|
cfi_adjust_cfa_offset (4)
|
|
pushl %edi
|
|
cfi_adjust_cfa_offset (4)
|
|
|
|
movl 20(%esp), %ebx
|
|
cfi_rel_offset (ebx, 8)
|
|
movl 24(%esp), %ecx
|
|
movl 28(%esp), %edx
|
|
movl 32(%esp), %esi
|
|
cfi_rel_offset (esi, 4)
|
|
movl 36(%esp), %edi
|
|
cfi_rel_offset (edi, 0)
|
|
movl 40(%esp), %ebp
|
|
cfi_rel_offset (ebp, 12)
|
|
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. */
|
|
ENTER_KERNEL
|
|
L(skip):
|
|
/* Restore registers. */
|
|
popl %edi
|
|
cfi_adjust_cfa_offset (-4)
|
|
cfi_restore (edi)
|
|
popl %esi
|
|
cfi_adjust_cfa_offset (-4)
|
|
cfi_restore (esi)
|
|
popl %ebx
|
|
cfi_adjust_cfa_offset (-4)
|
|
cfi_restore (ebx)
|
|
popl %ebp
|
|
cfi_adjust_cfa_offset (-4)
|
|
cfi_restore (ebp)
|
|
|
|
/* If 0 > %eax > -4096 there was an error. */
|
|
cmpl $-4096, %eax
|
|
ja SYSCALL_ERROR_LABEL
|
|
|
|
/* Successful; return the syscall's value. */
|
|
ret
|
|
|
|
PSEUDO_END (__mmap)
|
|
|
|
weak_alias (__mmap, mmap)
|