Relocate alpha from ports to libc

Also fixed the following whitespace nits to satisfy the push:

sysdeps/alpha/alphaev6/memset.S:142: space before tab in indent.
sysdeps/alpha/configure:1: new blank line at EOF.
sysdeps/alpha/fpu/e_sqrt.c:126: space before tab in indent.
sysdeps/alpha/preconfigure:1: new blank line at EOF.
sysdeps/unix/sysv/linux/alpha/syscalls.list:1: new blank line at EOF.

1 files changed, 86 insertions, 0 deletions

diff --git a/sysdeps/alpha/bb_init_func.S b/sysdeps/alpha/bb_init_func.S
new file mode 100644
index 0000000000..77a05b021c
--- /dev/null
+++ b/sysdeps/alpha/bb_init_func.S
@@ -0,0 +1,86 @@
+/* Copyright (C) 1996-2014 Free Software Foundation, Inc.
+   Contributed by David Mosberger (davidm@cs.arizona.edu).
+   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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+/* __bb_init_func is invoked at the beginning of each function, before
+   any registers have been saved.  It is therefore safe to use any
+   caller-saved (call-used) registers (except for argument registers
+   a1-a5). */
+
+#include <sysdep.h>
+
+/*
+ * These offsets should match with "struct bb" declared in gcc/libgcc2.c.
+ */
+#define	ZERO_WORD	0x00
+#define NEXT		0x20
+
+	.set	noat
+	.set	noreorder
+
+ENTRY(__bb_init_func)
+	.prologue 0
+
+	ldq	t0, ZERO_WORD(a0)	/* t0 <- blocks->zero_word */
+	beq	t0, init		/* not initialized yet -> */
+	ret
+
+END(__bb_init_func)
+
+	.ent init
+init:
+	.frame	sp, 0x38, ra, 0
+	subq	sp, 0x38, sp
+	.prologue 0
+
+	stq	pv, 0x30(sp)
+	br	pv, 1f
+1:	ldgp	gp, 0(pv)
+
+	ldiq	t1, __bb_head
+	lda	t3, _gmonparam
+	ldq	t2, 0(t1)
+	ldl	t3, 0(t3)		/* t3 = _gmonparam.state */
+	lda	t0, 1
+	stq	t0, ZERO_WORD(a0)	/* blocks->zero_word = 1 */
+	stq	t2, NEXT(a0)		/* blocks->next = __bb_head */
+	stq	a0, 0(t1)
+	bne	t2, $leave
+	beq	t3, $leave		/* t3 == GMON_PROF_ON? yes -> */
+
+	/* also need to initialize destructor: */
+	stq	ra, 0x00(sp)
+	lda	a0, __bb_exit_func
+	stq	a1, 0x08(sp)
+	lda	pv, atexit
+	stq	a2, 0x10(sp)
+	stq	a3, 0x18(sp)
+	stq	a4, 0x20(sp)
+	stq	a5, 0x28(sp)
+	jsr	ra, (pv), atexit
+	ldq	ra, 0x00(sp)
+	ldq	a1, 0x08(sp)
+	ldq	a2, 0x10(sp)
+	ldq	a3, 0x18(sp)
+	ldq	a4, 0x20(sp)
+	ldq	a5, 0x28(sp)
+
+$leave:	ldq	pv, 0x30(sp)
+	addq	sp, 0x38, sp
+	ret
+
+	.end init