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__ */