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
35#ifdef __i386__
36#include <i386/asm.h>
37#else /* !__i386__ */
38
39#ifndef _MACHINE_ASM_H_
40#define	_MACHINE_ASM_H_
41
42#include <sys/cdefs.h>
43
44#ifdef PIC
45#define	PIC_PLT(x)	x@PLT
46#define	PIC_GOT(x)	x@GOTPCREL(%rip)
47#else
48#define	PIC_PLT(x)	x
49#endif
50
51/*
52 * CNAME and HIDENAME manage the relationship between symbol names in C
53 * and the equivalent assembly language names.  CNAME is given a name as
54 * it would be used in a C program.  It expands to the equivalent assembly
55 * language name.  HIDENAME is given an assembly-language name, and expands
56 * to a possibly-modified form that will be invisible to C programs.
57 */
58#define CNAME(csym)		csym
59#define HIDENAME(asmsym)	.asmsym
60
61#define _START_ENTRY	.text; .p2align 4,0x90
62
63#define _ENTRY(x)	_START_ENTRY; \
64			.globl CNAME(x); .type CNAME(x),@function; CNAME(x):; \
65			.cfi_startproc
66
67#ifdef PROF
68#define	ALTENTRY(x)	_ENTRY(x); \
69			pushq %rbp; \
70			.cfi_def_cfa_offset 16; \
71			.cfi_offset %rbp, -16; \
72			movq %rsp,%rbp; \
73			call PIC_PLT(HIDENAME(mcount)); \
74			popq %rbp; \
75			.cfi_restore %rbp; \
76			.cfi_def_cfa_offset 8; \
77			jmp 9f
78#define	ENTRY(x)	_ENTRY(x); \
79			pushq %rbp; \
80			.cfi_def_cfa_offset 16; \
81			.cfi_offset %rbp, -16; \
82			movq %rsp,%rbp; \
83			call PIC_PLT(HIDENAME(mcount)); \
84			popq %rbp; \
85			.cfi_restore %rbp; \
86			.cfi_def_cfa_offset 8; \
87			9:
88#else
89#define	ALTENTRY(x)	_ENTRY(x)
90#define	ENTRY(x)	_ENTRY(x)
91#endif
92
93#define	END(x)		.size x, . - x; .cfi_endproc
94/*
95 * WEAK_REFERENCE(): create a weak reference alias from sym.
96 * The macro is not a general asm macro that takes arbitrary names,
97 * but one that takes only C names. It does the non-null name
98 * translation inside the macro.
99 */
100#define	WEAK_REFERENCE(sym, alias)					\
101	.weak CNAME(alias);						\
102	.equ CNAME(alias),CNAME(sym)
103
104#define RCSID(x)	.text; .asciz x
105
106#undef __FBSDID
107#if !defined(STRIP_FBSDID)
108#define __FBSDID(s)	.ident s
109#else
110#define __FBSDID(s)	/* nothing */
111#endif /* !STRIP_FBSDID */
112
113#endif /* !_MACHINE_ASM_H_ */
114
115#endif /* __i386__ */
116