From 70de0c73a54485b3434ef01d0e5e2b0528a60eef Mon Sep 17 00:00:00 2001 From: Peter Wemm Date: Fri, 13 Jun 2003 21:56:30 +0000 Subject: [PATCH] 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. --- lib/libc/amd64/gen/alloca.S | 53 ------------------------------------- 1 file changed, 53 deletions(-) delete mode 100644 lib/libc/amd64/gen/alloca.S diff --git a/lib/libc/amd64/gen/alloca.S b/lib/libc/amd64/gen/alloca.S deleted file mode 100644 index c94eafa0116a..000000000000 --- 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 -__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" */