1 files changed, 72 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/arm/mmap64.S b/sysdeps/unix/sysv/linux/arm/mmap64.S
new file mode 100644
index 0000000000..eae522988c
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arm/mmap64.S
@@ -0,0 +1,72 @@
+/* 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)