/* Copyright (C) 2000 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 /* The mmap2 system call takes six arguments, all in registers. */ .text .global mmap64; .type mmap64,%function .align 4; mmap64: stmfd sp!, {r4, r5, lr} ldr r5, [sp, $16] ldr r4, [sp, $12] movs ip, r5, lsl $20 @ check that offset is page-aligned bne .Linval ldr ip, [sp, $20] mov r5, r5, lsr $12 orr r5, r5, ip, lsl $20 @ compose page offset movs ip, ip, lsr $12 bne .Linval @ check for overflow mov ip, r0 swi __NR_mmap2 cmn r0, $4096 ldmccfd sp!, {r4, r5, pc} cmn r0, $ENOSYS ldmnefd sp!, {r4, r5, lr} bne __syscall_error (PLT) /* The current kernel does not support mmap2. Fall back to plain mmap if the offset is small enough. */ ldr r5, [sp, $20] mov r0, ip @ first arg was clobbered teq r5, $0 ldmeqfd sp!, {r4, r5, lr} beq mmap (PLT) .Linval: mov r0, $-EINVAL ldmfd sp!, {r4, r5, lr} b __syscall_error (PLT) __syscall_error: /* Looks like the syscall choked -- set errno */ ldr r3, .L4 /* Calculate the - of the syscall result, in case we need it */ rsb r2, r0, $0 /* errno = -result */ str r2, [r9,r3] /* return -1 */ mvn r0, $0 mov pc, lr .size mmap64,.-mmap64; .L4: .word errno #endif