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@@ -0,0 +1,79 @@
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+/* Copyright (C) 2000 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, write to the Free
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+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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+ 02111-1307 USA. */
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+
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+#define _ERRNO_H 1
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+#include <features.h>
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+#include <bits/errno.h>
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+#include <sys/syscall.h>
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+
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+#if defined __UCLIBC_HAS_LFS__ && defined __NR_mmap2
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+
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+
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+ /* The mmap2 system call takes six arguments, all in registers. */
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+ .text
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+ .global mmap64;
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+ .type mmap64,%function
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+ .align 4;
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+
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+mmap64:
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+ stmfd sp!, {r4, r5, lr}
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+ ldr r5, [sp, $16]
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+ ldr r4, [sp, $12]
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+ movs ip, r5, lsl $20 @ check that offset is page-aligned
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+ bne .Linval
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+ ldr ip, [sp, $20]
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+ mov r5, r5, lsr $12
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+ orr r5, r5, ip, lsl $20 @ compose page offset
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+ movs ip, ip, lsr $12
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+ bne .Linval @ check for overflow
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+ mov ip, r0
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+ swi __NR_mmap2
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+ cmn r0, $4096
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+ ldmccfd sp!, {r4, r5, pc}
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+ cmn r0, $ENOSYS
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+ ldmnefd sp!, {r4, r5, lr}
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+ bne __syscall_error (PLT)
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+ /* The current kernel does not support mmap2. Fall back to plain
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+ mmap if the offset is small enough. */
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+ ldr r5, [sp, $20]
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+ mov r0, ip @ first arg was clobbered
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+ teq r5, $0
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+ ldmeqfd sp!, {r4, r5, lr}
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+ beq mmap (PLT)
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+.Linval:
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+ mov r0, $-EINVAL
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+ ldmfd sp!, {r4, r5, lr}
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+ b __syscall_error (PLT)
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+
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+__syscall_error:
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+ /* Looks like the syscall choked -- set errno */
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+ ldr r3, .L4
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+ /* Calculate the - of the syscall result, in case we need it */
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+ rsb r2, r0, $0
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+
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+ /* errno = -result */
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+ str r2, [r9,r3]
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+
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+ /* return -1 */
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+ mvn r0, $0
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+ mov pc, lr
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+.size mmap64,.-mmap64;
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+
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+.L4: .word errno
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+
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+#endif
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Eric Andersen