diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/arm/mmap.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/arm/mmap.S | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/arm/mmap.S b/sysdeps/unix/sysv/linux/arm/mmap.S new file mode 100644 index 0000000000..0383bb5547 --- /dev/null +++ b/sysdeps/unix/sysv/linux/arm/mmap.S @@ -0,0 +1,64 @@ +/* Copyright (C) 1998-2014 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> + +#define EINVAL 22 + + .text + +ENTRY (__mmap) + /* shuffle args */ + push { r5 } + cfi_adjust_cfa_offset (4) + cfi_rel_offset (r5, 0) + ldr r5, [sp, #8] + push { r4 } + cfi_adjust_cfa_offset (4) + cfi_rel_offset (r4, 0) + cfi_remember_state + ldr r4, [sp, #8] + + /* convert offset to pages */ + movs ip, r5, lsl #20 + bne .Linval + mov r5, r5, lsr #12 + + /* do the syscall */ + DO_CALL (mmap2, 0) + + /* restore registers */ +2: + pop { r4 } + cfi_adjust_cfa_offset (-4) + cfi_restore (r4) + pop { r5 } + cfi_adjust_cfa_offset (-4) + cfi_restore (r5) + + cmn r0, $4096 + it cc + RETINSTR(cc, lr) + b PLTJMP(syscall_error) + + cfi_restore_state +.Linval: + mov r0, #-EINVAL + b 2b +PSEUDO_END (__mmap) + +weak_alias (__mmap, mmap) |