This is unusable on amd64. Remove it before it causes more confusion.

It is only possible to do this on an ABI that has a compulsory frame
pointer, which the amd64 ABI does not.  Thus, it is only possible to
implement this as a compiler builtin.

1 files changed, 0 insertions, 53 deletions

diff --git a/lib/libc/amd64/gen/alloca.S b/lib/libc/amd64/gen/alloca.S
deleted file mode 100644
index c94eafa..0000000
--- a/lib/libc/amd64/gen/alloca.S
+++ /dev/null
@@ -1,53 +0,0 @@
-/*-
- * Copyright (c) 1990 The Regents of the University of California.
- * All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * William Jolitz.
- *
- * 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.
- */
-
-#if defined(LIBC_SCCS) && !defined(lint)
-	.asciz "@(#)alloca.s	5.2 (Berkeley) 5/14/90"
-#endif /* LIBC_SCCS and not lint */
-#include <machine/asm.h>
-__FBSDID("$FreeBSD$");
-
-
-/* like alloc, but automatic automatic free in return */
-
-ENTRY(alloca)
-	popq	%rdx		/*  pop return addr */
-	movq	%rsp,%rcx
-	addq	$15,%rdi	/*  round amount to allocate up to 16 bytes */
-	andq	$~15,%rdi
-	subq	%rdi,%rsp
-	movq	%rsp,%rax	/* base of newly allocated space */
-	jmp	*%rdx		/* "return" */