Annotation of sys/arch/sparc64/include/asm.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: asm.h,v 1.4 2003/06/12 01:07:30 deraadt Exp $ */
2: /* $NetBSD: asm.h,v 1.15 2000/08/02 22:24:39 eeh Exp $ */
3:
4: /*
5: * Copyright (c) 1994 Allen Briggs
6: * All rights reserved.
7: *
8: * Gleaned from locore.s and sun3 asm.h which had the following copyrights:
9: * locore.s:
10: * Copyright (c) 1988 University of Utah.
11: * Copyright (c) 1982, 1990 The Regents of the University of California.
12: * sun3/include/asm.h:
13: * Copyright (c) 1993 Adam Glass
14: * Copyright (c) 1990 The Regents of the University of California.
15: *
16: * Redistribution and use in source and binary forms, with or without
17: * modification, are permitted provided that the following conditions
18: * are met:
19: * 1. Redistributions of source code must retain the above copyright
20: * notice, this list of conditions and the following disclaimer.
21: * 2. Redistributions in binary form must reproduce the above copyright
22: * notice, this list of conditions and the following disclaimer in the
23: * documentation and/or other materials provided with the distribution.
24: * 3. Neither the name of the University nor the names of its contributors
25: * may be used to endorse or promote products derived from this software
26: * without specific prior written permission.
27: *
28: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38: * SUCH DAMAGE.
39: */
40:
41: #ifndef _ASM_H_
42: #define _ASM_H_
43:
44: #ifndef _LOCORE
45: #define _LOCORE
46: #endif
47: #include <machine/frame.h>
48:
49: /* Pull in CCFSZ, CC64FSZ, and BIAS from frame.h */
50: #ifndef _LOCORE
51: #define _LOCORE
52: #endif
53: #include <machine/frame.h>
54:
55: #ifdef __ELF__
56: #define _C_LABEL(name) name
57: #else
58: #ifdef __STDC__
59: #define _C_LABEL(name) _ ## name
60: #else
61: #define _C_LABEL(name) _/**/name
62: #endif
63: #endif
64: #define _ASM_LABEL(name) name
65:
66: #ifdef PIC
67: /*
68: * PIC_PROLOGUE() is akin to the compiler generated function prologue for
69: * PIC code. It leaves the address of the Global Offset Table in DEST,
70: * clobbering register TMP in the process. Using the temporary enables us
71: * to work without a stack frame (doing so requires saving %o7) .
72: */
73: #define PIC_PROLOGUE(dest,tmp) \
74: sethi %hi(_GLOBAL_OFFSET_TABLE_-4),dest; \
75: rd %pc, tmp; \
76: or dest,%lo(_GLOBAL_OFFSET_TABLE_+4),dest; \
77: add dest,tmp,dest
78:
79: /*
80: * PICCY_SET() does the equivalent of a `set var, %dest' instruction in
81: * a PIC-like way, but without involving the Global Offset Table. This
82: * only works for VARs defined in the same file *and* in the text segment.
83: */
84: #define PICCY_SET(var,dest,tmp) \
85: 3: rd %pc, tmp; add tmp,(var-3b),dest
86: #else
87: #define PIC_PROLOGUE(dest,tmp)
88: #define PICCY_OFFSET(var,dest,tmp)
89: #endif
90:
91: #define FTYPE(x) .type x,@function
92: #define OTYPE(x) .type x,@object
93:
94: #define _ENTRY(name) \
95: .align 4; .globl name; .proc 1; FTYPE(name); name:
96:
97: #ifdef GPROF
98: #define _PROF_PROLOGUE \
99: .data; .align 8; 1: .uaword 0; .uaword 0; \
100: .text; save %sp,-CC64FSZ,%sp; sethi %hi(1b),%o0; call _mcount; \
101: or %o0,%lo(1b),%o0; restore
102: #else
103: #define _PROF_PROLOGUE
104: #endif
105:
106: #define ENTRY(name) _ENTRY(_C_LABEL(name)); _PROF_PROLOGUE
107: #define ASENTRY(name) _ENTRY(_ASM_LABEL(name)); _PROF_PROLOGUE
108: #define FUNC(name) ASENTRY(name)
109: #define RODATA(name) .align 4; .text; .globl _C_LABEL(name); \
110: OTYPE(_C_LABEL(name)); _C_LABEL(name):
111:
112:
113: #define ASMSTR .asciz
114:
115: #define RCSID(name) .asciz name
116:
117: #ifdef __ELF__
118: #define WEAK_ALIAS(alias,sym) \
119: .weak alias; \
120: alias = sym
121: #endif
122:
123: /*
124: * WARN_REFERENCES: create a warning if the specified symbol is referenced.
125: */
126: #ifdef __ELF__
127: #ifdef __STDC__
128: #define WARN_REFERENCES(_sym,_msg) \
129: .section .gnu.warning. ## _sym ; .ascii _msg ; .text
130: #else
131: #define WARN_REFERENCES(_sym,_msg) \
132: .section .gnu.warning./**/_sym ; .ascii _msg ; .text
133: #endif /* __STDC__ */
134: #else
135: #ifdef __STDC__
136: #define __STRING(x) #x
137: #define WARN_REFERENCES(sym,msg) \
138: .stabs msg ## ,30,0,0,0 ; \
139: .stabs __STRING(_ ## sym) ## ,1,0,0,0
140: #else
141: #define __STRING(x) "x"
142: #define WARN_REFERENCES(sym,msg) \
143: .stabs msg,30,0,0,0 ; \
144: .stabs __STRING(_/**/sym),1,0,0,0
145: #endif /* __STDC__ */
146: #endif /* __ELF__ */
147:
148: #endif /* _ASM_H_ */
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