1/* $NetBSD: alloca.S,v 1.1 2001/06/19 00:25:02 fvdl Exp $ */ 2 3#include <machine/asm.h> 4 5#if defined(LIBC_SCCS) 6 RCSID("$NetBSD: alloca.S,v 1.1 2001/06/19 00:25:02 fvdl Exp $") 7#endif 8 9ENTRY(alloca) 10 popq %rdx 11 movq %rsp,%rcx 12 addq $15,%rdi /* round up to 16 bytes */ 13 andq $~15,%rdi 14 subq %rdi,%rsp 15 movq %rsp,%rax 16 jmp *%rdx 17