1 files changed, 97 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/sparc64/brk.S b/sysdeps/unix/sysv/linux/sparc64/brk.S
new file mode 100644
index 0000000000..87412e095a
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/sparc64/brk.S
@@ -0,0 +1,97 @@
+/* Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Richard Henderson <richard@gnu.ai.mit.edu>, 1997.
+
+   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., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* __brk is a special syscall under Linux since it never returns an
+   error.  Instead, the error condition is indicated by returning the old
+   break value (instead of the new, requested one).  */
+
+#include <sysdep.h>
+#define _ERRNO_H
+#include <bits/errno.h>
+
+#ifdef PIC
+.section .bss
+	.align 8
+	.globl __curbrk
+__curbrk: .skip 8
+	.type __curbrk,@object
+	.size __curbrk,8
+#else
+.common __curbrk, 8, 8
+#endif
+
+	.text
+ENTRY(__brk)
+	save	%sp, -160, %sp
+#ifdef PIC
+1:	rd	%pc, %g1
+	sethi	%hi(_GLOBAL_OFFSET_TABLE_-(1b-.)), %l7
+	or	%l7, %lo(_GLOBAL_OFFSET_TABLE_-(1b-.)), %l7
+	add	%l7, %g1, %l7
+#endif
+
+	LOADSYSCALL(brk)
+	mov	%i0, %o0
+
+	ta	0x11
+
+	/* All the ways we can fail... */
+	bcs,pn	%xcc, .Lerr1
+	 nop
+	brz	%i0, .Lok
+	 subcc	%i0, %o0, %g0
+	bne,pn	%xcc, .Lerr0
+
+	/* Update __curbrk and return cleanly.  */
+.Lok:	sethi	%hi(__curbrk), %g1
+	or	%g1, %lo(__curbrk), %g1
+#ifdef PIC
+	ldx	[%l7+%g1], %g1
+	stx	%o0, [%g1]
+#else
+	stx	%o0, [%g4+%g1]
+#endif
+	mov	%g0, %i0
+
+	/* Don't use "ret" cause the preprocessor will eat it.  */
+	jmpl	%i7+8, %g0
+	 restore
+	
+	/* What a horrible way to die.  */
+.Lerr0:	set	ENOMEM, %o0
+.Lerr1:	sethi	%hi(errno), %g1
+	or	%g1, %lo(errno), %g1
+#ifdef PIC
+	ldx	[%l7+%g1], %g1
+	st	%o0, [%g1]
+#else
+	st	%o0, [%g4+%g1]
+#endif
+#ifdef _LIBC_REENTRANT
+	call	__errno_location
+	 mov	%o0,%l1
+	st	%l1, [%o0]
+#endif
+	sub	%g0, 1, %i0
+	jmpl	%i7+8, %g0
+	 restore
+
+	.size __brk, .-__brk
+
+weak_alias (__brk, brk)