1 files changed, 81 insertions, 0 deletions
diff --git a/lib/libc/mips/sys/brk.S b/lib/libc/mips/sys/brk.S
new file mode 100644
index 0000000..483be25
--- /dev/null
+++ b/lib/libc/mips/sys/brk.S
@@ -0,0 +1,81 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Ralph Campbell.
+ *
+ * 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.
+ */
+
+#include "SYS.h"
+
+#if defined(SYSLIBC_SCCS)
+	.text
+	.asciz "$OpenBSD$"
+#endif /* SYSLIBC_SCCS */
+
+	.globl	minbrk
+	.globl	curbrk
+
+	.data
+minbrk:	.word	_C_LABEL(end)
+	.text
+
+LEAF(brk)
+	.set	reorder
+	lw	v0, minbrk
+	bltu	a0, v0, 1f
+	la	t9, _brk
+	jr	t9
+1:
+	move	a0, v0		# dont allow break < minbrk
+	li	v0, SYS_break
+	syscall
+	bne	a3, zero, 2f
+	sw	a0, curbrk
+	move	v0, zero
+	j	ra
+2:
+	la	t9, _C_LABEL(cerror)
+	jr	t9
+END(brk)
+
+LEAF(_brk)
+	.set	reorder
+	li	v0, SYS_break
+	syscall
+	bne	a3, zero, 1f
+	sw	a0, curbrk
+	move	v0, zero
+	j	ra
+1:
+	la	t9, _C_LABEL(cerror)
+	jr	t9
+END(brk)