/* Copyright (C) 1995,96,97,98,99,2000,2002 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 <_lfs_64.h> #define _ERRNO_H 1 #include <bits/errno.h> #include <sys/syscall.h> #ifdef __NR_mmap2 #define LINKAGE 4 #define PTR_SIZE 4 #define SVRSP 16 /* saved register space */ #define PARMS LINKAGE+SVRSP /* space for 4 saved regs */ #define ADDR PARMS #define LEN ADDR+PTR_SIZE #define PROT LEN+4 #define FLAGS PROT+4 #define FD FLAGS+4 #define OFFLO FD+4 #define OFFHI OFFLO+4 .text .global mmap64 .type mmap64,%function mmap64: /* Save registers. */ pushl %ebp pushl %ebx pushl %esi pushl %edi movl OFFLO(%esp), %edx movl OFFHI(%esp), %ecx testl $0xfff, %edx jne L_einval shrdl $12, %ecx, %edx /* mmap2 takes the offset in pages. */ shrl $12, %ecx jne L_einval movl %edx, %ebp movl ADDR(%esp), %ebx movl LEN(%esp), %ecx movl PROT(%esp), %edx movl FLAGS(%esp), %esi movl FD(%esp), %edi movl $__NR_mmap2, %eax /* System call number in %eax. */ /* Do the system call trap. */ int $0x80 /* Restore registers. */ popl %edi popl %esi popl %ebx popl %ebp /* If 0 > %eax > -4096 there was an error. */ cmpl $-4095,%eax ja __syscall_error /* Successful; return the syscall's value. */ 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 .size mmap64,.-mmap64 #endif