1 files changed, 73 insertions, 0 deletions
diff --git a/lib/libc/powerpc/sys/brk.S b/lib/libc/powerpc/sys/brk.S
new file mode 100644
index 0000000..9223db3
--- /dev/null
+++ b/lib/libc/powerpc/sys/brk.S
@@ -0,0 +1,73 @@
+/*-
+ * Copyright (c) 2002 Peter Grehan.
+ * All rights reserved.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ */
+/*      $NetBSD: brk.S,v 1.9 2000/06/26 06:25:43 kleink Exp $   */
+
+#include <machine/asm.h>
+__FBSDID("$FreeBSD$");
+
+#include "SYS.h"
+
+        .globl  HIDENAME(curbrk)
+        .globl  HIDENAME(minbrk)
+        .globl  CNAME(_end)
+
+        .data
+HIDENAME(minbrk):
+        .long   CNAME(_end)
+
+        .text
+
+ENTRY(brk)
+#ifdef PIC
+	mflr    %r10
+	bl	_GLOBAL_OFFSET_TABLE_@local-4
+	mflr	%r9
+	mtlr	%r10
+	lwz	%r5,HIDENAME(minbrk)@got(%r9)
+	lwz	%r6,0(%r5)
+#else
+	lis	%r5,HIDENAME(minbrk)@ha
+	lwz	%r6,HIDENAME(minbrk)@l(%r5)
+#endif
+	cmplw   %r6,%r3			/* if (minbrk <= r3) */
+	bgt     0f
+	mr	%r6,%r3			/* r6 = r3 */
+0:
+	mr      %r3,%r6			/* new break value */
+	li      %r0,SYS_break
+	sc				/* assume, that r5 is kept */
+	bso	1f
+#ifdef PIC
+	lwz	%r7,HIDENAME(curbrk)@got(%r9)
+	stw	%r6,0(%r7)
+#else
+	lis	%r7,HIDENAME(curbrk)@ha /* record new break */
+	stw	%r6,HIDENAME(curbrk)@l(%r7)
+#endif
+	blr				/* return 0 */
+
+1:
+	b	PIC_PLT(HIDENAME(cerror))