1 /* Copyright (C) 2000 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 #include <bits/errno.h>
22 #include <sys/syscall.h>
24 #if defined __UCLIBC_HAS_LFS__ && defined __NR_mmap2
26 /* The mmap2 system call takes six arguments, all in registers. */
29 .type mmap64,%function
32 stmfd sp!, {r4, r5, lr}
35 movs ip, r5, lsl $20 @ check that offset is page-aligned
39 orr r5, r5, ip, lsl $20 @ compose page offset
41 bne .Linval @ check for overflow
45 ldmccfd sp!, {r4, r5, pc}
47 ldmnefd sp!, {r4, r5, lr}
49 /* The current kernel does not support mmap2. Fall back to plain
50 mmap if the offset is small enough. */
52 mov r0, ip @ first arg was clobbered
54 ldmeqfd sp!, {r4, r5, lr}
55 beq HIDDEN_JUMPTARGET(mmap)
58 ldmfd sp!, {r4, r5, lr}