| /* Copyright (C) 2000-2014 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> |
| |
| .syntax unified |
| |
| #define EINVAL 22 |
| |
| #ifdef __ARMEB__ |
| # define LOW_OFFSET 8 + 4 |
| /* The initial + 4 is for the stack postdecrement. */ |
| # define HIGH_OFFSET 4 + 8 + 0 |
| #else |
| # define LOW_OFFSET 8 + 0 |
| # define HIGH_OFFSET 4 + 8 + 4 |
| #endif |
| |
| /* The mmap2 system call takes six arguments, all in registers. */ |
| .text |
| ENTRY (__mmap64) |
| ldr ip, [sp, $LOW_OFFSET] |
| push { r5 } |
| cfi_adjust_cfa_offset (4) |
| cfi_rel_offset (r5, 0) |
| ldr r5, [sp, $HIGH_OFFSET] |
| push { r4 } |
| cfi_adjust_cfa_offset (4) |
| cfi_rel_offset (r4, 0) |
| cfi_remember_state |
| movs r4, ip, lsl $20 @ check that offset is page-aligned |
| mov ip, ip, lsr $12 |
| it eq |
| movseq r4, r5, lsr $12 @ check for overflow |
| bne .Linval |
| ldr r4, [sp, $8] @ load fd |
| orr r5, ip, r5, lsl $20 @ compose page offset |
| DO_CALL (mmap2, 0) |
| cmn r0, $4096 |
| pop {r4, r5} |
| cfi_adjust_cfa_offset (-8) |
| cfi_restore (r4) |
| cfi_restore (r5) |
| it cc |
| RETINSTR(cc, lr) |
| b PLTJMP(syscall_error) |
| |
| cfi_restore_state |
| .Linval: |
| mov r0, $-EINVAL |
| pop {r4, r5} |
| cfi_adjust_cfa_offset (-8) |
| cfi_restore (r4) |
| cfi_restore (r5) |
| b PLTJMP(syscall_error) |
| PSEUDO_END (__mmap64) |
| |
| weak_alias (__mmap64, mmap64) |
