arm32 libc support

1 files changed, 69 insertions, 0 deletions

diff --git a/lib/libc/arch/arm32/sys/brk.S b/lib/libc/arch/arm32/sys/brk.S
new file mode 100644
index 00000000000..7f06268fa33
--- /dev/null
+++ b/lib/libc/arch/arm32/sys/brk.S
@@ -0,0 +1,69 @@
+/* $NetBSD: brk.S,v 1.1 1996/02/16 20:48:42 mark Exp $ */
+
+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * William Jolitz.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	from: @(#)brk.s	5.2 (Berkeley) 12/17/90
+ *	$Id: brk.S,v 1.1 1996/05/01 12:51:26 deraadt Exp $
+ */
+
+#include "SYS.h"
+
+	.globl	_end
+	.globl	minbrk
+	.globl	curbrk
+
+	.data
+minbrk:	.long	_end
+	.text
+	.align	0
+
+ENTRY(brk)
+	ldr	r1, Lminbrk
+	cmp	r0, r1
+	movlt	r0, r1
+	mov	r2, r0
+	swi	SYS_break
+	bcs	cerror
+	mov	r0, #0x00000000
+	ldr	r1, Lcurbrk
+	str	r2, [r1]
+	mov	r15, r14
+
+Lminbrk:
+	.word	minbrk
+
+Lcurbrk:
+	.word	curbrk