| /* 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, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| |
| #define _ERRNO_H 1 |
| #include <features.h> |
| #include <bits/errno.h> |
| #include <sys/syscall.h> |
| |
| #if defined __UCLIBC_HAS_LFS__ && defined __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 |