1/*-
  2 * SPDX-License-Identifier: BSD-3-Clause
  3 *
  4 * Copyright (c) 1990 The Regents of the University of California.
  5 * All rights reserved.
  6 *
  7 * This code is derived from software contributed to Berkeley by
  8 * William Jolitz.
  9 *
 10 * Redistribution and use in source and binary forms, with or without
 11 * modification, are permitted provided that the following conditions
 12 * are met:
 13 * 1. Redistributions of source code must retain the above copyright
 14 *    notice, this list of conditions and the following disclaimer.
 15 * 2. Redistributions in binary form must reproduce the above copyright
 16 *    notice, this list of conditions and the following disclaimer in the
 17 *    documentation and/or other materials provided with the distribution.
 18 * 3. Neither the name of the University nor the names of its contributors
 19 *    may be used to endorse or promote products derived from this software
 20 *    without specific prior written permission.
 21 *
 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 32 * SUCH DAMAGE.
 33 *
 34 *	from: @(#)DEFS.h	5.1 (Berkeley) 4/23/90
 35 */
 36
 37#ifdef __i386__
 38#include <i386/asm.h>
 39#else /* !__i386__ */
 40
 41#ifndef _MACHINE_ASM_H_
 42#define	_MACHINE_ASM_H_
 43
 44#include <sys/cdefs.h>
 45
 46#ifdef PIC
 47#define	PIC_PLT(x)	x@PLT
 48#define	PIC_GOT(x)	x@GOTPCREL(%rip)
 49#else
 50#define	PIC_PLT(x)	x
 51#endif
 52
 53/*
 54 * CNAME and HIDENAME manage the relationship between symbol names in C
 55 * and the equivalent assembly language names.  CNAME is given a name as
 56 * it would be used in a C program.  It expands to the equivalent assembly
 57 * language name.  HIDENAME is given an assembly-language name, and expands
 58 * to a possibly-modified form that will be invisible to C programs.
 59 */
 60#define CNAME(csym)		csym
 61#define HIDENAME(asmsym)	.asmsym
 62
 63#define _START_ENTRY	.text; .p2align 4,0x90
 64
 65#define _ENTRY(x)	_START_ENTRY; \
 66			.globl CNAME(x); .type CNAME(x),@function; CNAME(x):; \
 67			.cfi_startproc
 68
 69#ifdef PROF
 70#define	ALTENTRY(x)	_ENTRY(x); \
 71			pushq %rbp; \
 72			.cfi_def_cfa_offset 16; \
 73			.cfi_offset %rbp, -16; \
 74			movq %rsp,%rbp; \
 75			call PIC_PLT(HIDENAME(mcount)); \
 76			popq %rbp; \
 77			.cfi_restore %rbp; \
 78			.cfi_def_cfa_offset 8; \
 79			jmp 9f
 80#define	ENTRY(x)	_ENTRY(x); \
 81			pushq %rbp; \
 82			.cfi_def_cfa_offset 16; \
 83			.cfi_offset %rbp, -16; \
 84			movq %rsp,%rbp; \
 85			call PIC_PLT(HIDENAME(mcount)); \
 86			popq %rbp; \
 87			.cfi_restore %rbp; \
 88			.cfi_def_cfa_offset 8; \
 89			9:
 90#else
 91#define	ALTENTRY(x)	_ENTRY(x)
 92#define	ENTRY(x)	_ENTRY(x)
 93#endif
 94
 95#define	END(x)		.size x, . - x; .cfi_endproc
 96/*
 97 * WEAK_REFERENCE(): create a weak reference alias from sym. 
 98 * The macro is not a general asm macro that takes arbitrary names,
 99 * but one that takes only C names. It does the non-null name
100 * translation inside the macro.
101 */
102#define	WEAK_REFERENCE(sym, alias)					\
103	.weak CNAME(alias);						\
104	.equ CNAME(alias),CNAME(sym)
105
106#define RCSID(x)	.text; .asciz x
107
108#undef __FBSDID
109#if !defined(STRIP_FBSDID)
110#define __FBSDID(s)	.ident s
111#else
112#define __FBSDID(s)	/* nothing */
113#endif /* !STRIP_FBSDID */
114
115#endif /* !_MACHINE_ASM_H_ */
116
117#endif /* __i386__ */