mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-16 18:10:11 +00:00
a8ef1b608b
2000-01-13 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/i386/mmap64.S: Fix code generated if mmap2 is available when compiling but no at runtime.
126 lines
2.6 KiB
ArmAsm
126 lines
2.6 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
|
|
#define ENOSYS 38
|
|
|
|
.text
|
|
|
|
ENTRY (__mmap64)
|
|
|
|
#ifdef __NR_mmap2
|
|
|
|
/* Save registers. */
|
|
pushl %ebp
|
|
pushl %ebx
|
|
pushl %esi
|
|
pushl %edi
|
|
|
|
movl 40(%esp), %edx
|
|
movl 44(%esp), %ecx
|
|
testl $0x3ff, %edx
|
|
jne L(einval)
|
|
shrdl $12, %ecx, %edx /* mmap2 takes the offset in pages. */
|
|
shrl $12, %ecx
|
|
jne L(einval)
|
|
movl %edx, %ebp
|
|
|
|
movl 20(%esp), %ebx
|
|
movl 24(%esp), %ecx
|
|
movl 28(%esp), %edx
|
|
movl 32(%esp), %esi
|
|
movl 36(%esp), %edi
|
|
|
|
movl $SYS_ify(mmap2), %eax /* System call number in %eax. */
|
|
|
|
/* Do the system call trap. */
|
|
L(do_syscall):
|
|
int $0x80
|
|
|
|
/* Restore registers. */
|
|
popl %edi
|
|
popl %esi
|
|
popl %ebx
|
|
popl %ebp
|
|
|
|
#ifndef __ASSUME_MMAP2_SYSCALL
|
|
2:
|
|
cmp $-ENOSYS, %eax
|
|
je 3f
|
|
#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
|
|
|
|
/* This means the offset value is too large. */
|
|
L(einval):
|
|
popl %edi
|
|
popl %esi
|
|
popl %ebx
|
|
popl %ebp
|
|
movl $-EINVAL, %eax
|
|
jmp SYSCALL_ERROR_LABEL
|
|
#endif
|
|
|
|
#if !defined __ASSUME_MMAP2_SYSCALL || !defined __NR_mmap2
|
|
3:
|
|
/* Save registers. */
|
|
movl %ebx, %edx
|
|
|
|
cmpl $0, 28(%esp)
|
|
jne L(einval2)
|
|
|
|
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
|
|
|
|
/* If 0 > %eax > -4096 there was an error. */
|
|
cmpl $-4096, %eax
|
|
ja SYSCALL_ERROR_LABEL
|
|
|
|
/* Successful; return the syscall's value. */
|
|
#ifndef __NR_mmap2
|
|
L(pseudo_end):
|
|
#endif
|
|
ret
|
|
|
|
L(einval2):
|
|
movl %edx, %ebx
|
|
movl $-EINVAL, %eax
|
|
jmp SYSCALL_ERROR_LABEL
|
|
#endif
|
|
|
|
PSEUDO_END (__mmap64)
|
|
|
|
weak_alias (__mmap64, mmap64)
|