initial import

sysdeps/unix/sparc/brk.S

@@ -0,0 +1,55 @@
+/* Copyright (C) 1993, 1995 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <sysdep.h>
+
+#ifndef	SYS_brk
+#define	SYS_brk	17
+#endif
+
+#ifndef C_SYMBOL_NAME
+#define	C_SYMBOL_NAME(name)	_##name
+#endif
+
+.data
+.global C_SYMBOL_NAME(__curbrk)
+C_LABEL(__curbrk)
+#ifdef	HAVE_GNU_LD
+	.long C_SYMBOL_NAME(_end)
+#else
+	.long C_SYMBOL_NAME(end)
+#endif
+
+.text
+ENTRY (__brk)
+	add %o0, 7, %o0
+	andn %o0, 7, %o0
+	mov SYS_brk, %g1
+	mov %o0, %o1		/* Save rounded value.  */
+	ta %g0
+	bcs error
+	sethi %hi(C_SYMBOL_NAME(__curbrk)), %g1
+	st %o1, [%g1 + %lo(C_SYMBOL_NAME(__curbrk))]
+	ret
+error:	sethi %hi(C_SYMBOL_NAME(errno)), %g1
+	st %o0, [%g1 + %lo(C_SYMBOL_NAME(errno))]
+	sub %g0, 1, %o0
+	retl
+	nop			/* Fill the delay slot.  */
+
+weak_alias (__brk, brk)