Annotation of sys/arch/amd64/include/asm.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: asm.h,v 1.2 2005/12/13 00:18:19 jsg Exp $ */
2: /* $NetBSD: asm.h,v 1.2 2003/05/02 18:05:47 yamt Exp $ */
3:
4: /*-
5: * Copyright (c) 1990 The Regents of the University of California.
6: * All rights reserved.
7: *
8: * This code is derived from software contributed to Berkeley by
9: * William Jolitz.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: * 3. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: *
35: * @(#)asm.h 5.5 (Berkeley) 5/7/91
36: */
37:
38: #ifndef _AMD64_ASM_H_
39: #define _AMD64_ASM_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: #define PIC_GOT(x) x
47: #endif
48:
49: # define _C_LABEL(x) x
50: #define _ASM_LABEL(x) x
51:
52: #define CVAROFF(x,y) (_C_LABEL(x)+y)(%rip)
53:
54: #ifdef __STDC__
55: # define __CONCAT(x,y) x ## y
56: # define __STRING(x) #x
57: #else
58: # define __CONCAT(x,y) x/**/y
59: # define __STRING(x) "x"
60: #endif
61:
62: /* let kernels and others override entrypoint alignment */
63: #ifndef _ALIGN_TEXT
64: #define _ALIGN_TEXT .align 16, 0x90
65: #endif
66:
67: #define _ENTRY(x) \
68: .text; _ALIGN_TEXT; .globl x; .type x,@function; x:
69:
70: #ifdef _KERNEL
71: /* XXX Can't use __CONCAT() here, as it would be evaluated incorrectly. */
72: #ifdef __STDC__
73: #define IDTVEC(name) \
74: .text; ALIGN_TEXT; .globl X ## name; .type X ## name,@function; X ## name:
75: #else
76: #define IDTVEC(name) \
77: .text; ALIGN_TEXT; .globl X/**/name; .type X/**/name,@function; X/**/name:
78: #endif /* __STDC__ */
79: #endif /* _KERNEL */
80:
81: #ifdef __STDC__
82: #define CPUVAR(off) %gs:CPU_INFO_ ## off
83: #else
84: #define CPUVAR(off) %gs:CPU_INFO_/**/off
85: #endif
86:
87:
88: #ifdef GPROF
89: # define _PROF_PROLOGUE \
90: pushq %rbp; leaq (%rsp),%rbp; call PIC_PLT(__mcount); popq %rbp
91: #else
92: # define _PROF_PROLOGUE
93: #endif
94:
95: #define ENTRY(y) _ENTRY(_C_LABEL(y)); _PROF_PROLOGUE
96: #define NENTRY(y) _ENTRY(_C_LABEL(y))
97: #define ASENTRY(y) _ENTRY(_ASM_LABEL(y)); _PROF_PROLOGUE
98:
99: #define ASMSTR .asciz
100:
101: #define RCSID(x) .text; .asciz x
102:
103: #define WEAK_ALIAS(alias,sym) \
104: .weak alias; \
105: alias = sym
106:
107: /* XXXfvdl do not use stabs here */
108: #ifdef __STDC__
109: #define WARN_REFERENCES(sym,msg) \
110: .stabs msg ## ,30,0,0,0 ; \
111: .stabs __STRING(_C_LABEL(sym)) ## ,1,0,0,0
112: #else
113: #define WARN_REFERENCES(sym,msg) \
114: .stabs msg,30,0,0,0 ; \
115: .stabs __STRING(sym),1,0,0,0
116: #endif /* __STDC__ */
117:
118: #endif /* !_AMD64_ASM_H_ */
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