1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * from: @(#)DEFS.h 5.1 (Berkeley) 4/23/90 33 * $FreeBSD$ 34 */ 35 36 #ifndef _MACHINE_ASM_H_ 37 #define _MACHINE_ASM_H_ 38 39 #include <sys/cdefs.h> 40 41 #ifdef PIC 42 #define PIC_PLT(x) x@PLT 43 #define PIC_GOT(x) x@GOTPCREL(%rip) 44 #else 45 #define PIC_PLT(x) x 46 #endif 47 48 /* 49 * CNAME and HIDENAME manage the relationship between symbol names in C 50 * and the equivalent assembly language names. CNAME is given a name as 51 * it would be used in a C program. It expands to the equivalent assembly 52 * language name. HIDENAME is given an assembly-language name, and expands 53 * to a possibly-modified form that will be invisible to C programs. 54 */ 55 #define CNAME(csym) csym 56 #define HIDENAME(asmsym) .asmsym 57 58 #define _START_ENTRY .text; .p2align 4,0x90 59 60 #define _ENTRY(x) _START_ENTRY; \ 61 .globl CNAME(x); .type CNAME(x),@function; CNAME(x): 62 63 #ifdef PROF 64 #define ALTENTRY(x) _ENTRY(x); \ 65 pushq %rbp; movq %rsp,%rbp; \ 66 call PIC_PLT(HIDENAME(mcount)); \ 67 popq %rbp; \ 68 jmp 9f 69 #define ENTRY(x) _ENTRY(x); \ 70 pushq %rbp; movq %rsp,%rbp; \ 71 call PIC_PLT(HIDENAME(mcount)); \ 72 popq %rbp; \ 73 9: 74 #else 75 #define ALTENTRY(x) _ENTRY(x) 76 #define ENTRY(x) _ENTRY(x) 77 #endif 78 79 #define END(x) .size x, . - x 80 /* 81 * WEAK_REFERENCE(): create a weak reference alias from sym. 82 * The macro is not a general asm macro that takes arbitrary names, 83 * but one that takes only C names. It does the non-null name 84 * translation inside the macro. 85 */ 86 #define WEAK_REFERENCE(sym, alias) \ 87 .weak CNAME(alias); \ 88 .equ CNAME(alias),CNAME(sym) 89 90 #define RCSID(x) .text; .asciz x 91 92 #undef __FBSDID 93 #if !defined(lint) && !defined(STRIP_FBSDID) 94 #define __FBSDID(s) .ident s 95 #else 96 #define __FBSDID(s) /* nothing */ 97 #endif /* not lint and not STRIP_FBSDID */ 98 99 #endif /* !_MACHINE_ASM_H_ */ 100