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- /* 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
- .align 1<<4
- 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
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