1/* $NetBSD: asm.h,v 1.19 2014/05/22 14:59:01 uebayasi Exp $ */
2
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 * @(#)asm.h 5.5 (Berkeley) 5/7/91
35 */
36
37#ifndef _AMD64_ASM_H_
38#define _AMD64_ASM_H_
39
40#ifdef __x86_64__
41
42#ifdef __PIC__
43#define PIC_PLT(x) x@PLT
44#define PIC_GOT(x) x@GOTPCREL(%rip)
45#else
46#define PIC_PLT(x) x
47#define PIC_GOT(x) x
48#endif
49
50#define _C_LABEL(x) x
51#define _ASM_LABEL(x) x
52
53#define CVAROFF(x,y) (_C_LABEL(x)+y)(%rip)
54
55#ifdef __STDC__
56# define __CONCAT(x,y) x ## y
57# define __STRING(x) #x
58#else
59# define __CONCAT(x,y) x/**/y
60# define __STRING(x) "x"
61#endif
62
63/* let kernels and others override entrypoint alignment */
64#ifndef _ALIGN_TEXT
65# ifdef _STANDALONE
66# define _ALIGN_TEXT .align 4
67# else
68# define _ALIGN_TEXT .align 16
69# endif
70#endif
71
72#define _ENTRY(x) \
73 .text; _ALIGN_TEXT; .globl x; .type x,@function; x:
74#define _LABEL(x) \
75 .globl x; x:
76
77#ifdef _KERNEL
78/* XXX Can't use __CONCAT() here, as it would be evaluated incorrectly. */
79#ifdef __STDC__
80#define IDTVEC(name) \
81 ALIGN_TEXT; .globl X ## name; .type X ## name,@function; X ## name:
82#define IDTVEC_END(name) \
83 .size X ## name, . - X ## name
84#else
85#define IDTVEC(name) \
86 ALIGN_TEXT; .globl X/**/name; .type X/**/name,@function; X/**/name:
87#define IDTVEC_END(name) \
88 .size X/**/name, . - X/**/name
89#endif /* __STDC__ */
90#endif /* _KERNEL */
91
92#ifdef __STDC__
93#define CPUVAR(off) %gs:CPU_INFO_ ## off
94#else
95#define CPUVAR(off) %gs:CPU_INFO_/**/off
96#endif
97
98
99#ifdef GPROF
100# define _PROF_PROLOGUE \
101 pushq %rbp; leaq (%rsp),%rbp; call PIC_PLT(__mcount); popq %rbp
102#else
103# define _PROF_PROLOGUE
104#endif
105
106#define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
107#define NENTRY(y) _ENTRY(_C_LABEL(y))
108#define ALTENTRY(x) NENTRY(x)
109#define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
110#define LABEL(y) _LABEL(_C_LABEL(y))
111#define END(y) .size y, . - y
112
113#define ASMSTR .asciz
114
115#define RCSID(x) .pushsection ".ident"; .asciz x; .popsection
116
117#define WEAK_ALIAS(alias,sym) \
118 .weak alias; \
119 alias = sym
120
121/*
122 * STRONG_ALIAS: create a strong alias.
123 */
124#define STRONG_ALIAS(alias,sym) \
125 .globl alias; \
126 alias = sym
127
128#ifdef __STDC__
129#define WARN_REFERENCES(sym,msg) \
130 .pushsection .gnu.warning. ## sym; \
131 .ascii msg; \
132 .popsection
133#else
134#define WARN_REFERENCES(sym,msg) \
135 .pushsection .gnu.warning./**/sym; \
136 .ascii msg; \
137 .popsection
138#endif /* __STDC__ */
139
140#else /* __x86_64__ */
141
142#include <i386/asm.h>
143
144#endif /* __x86_64__ */
145
146#endif /* !_AMD64_ASM_H_ */
147