asm.h revision 1.16.2.2
1 1.16.2.2 nathanw /* $NetBSD: asm.h,v 1.16.2.2 2002/02/28 04:12:12 nathanw Exp $ */ 2 1.16.2.2 nathanw 3 1.16.2.2 nathanw /* 4 1.16.2.2 nathanw * Copyright (c) 1994 Allen Briggs 5 1.16.2.2 nathanw * All rights reserved. 6 1.16.2.2 nathanw * 7 1.16.2.2 nathanw * Gleaned from locore.s and sun3 asm.h which had the following copyrights: 8 1.16.2.2 nathanw * locore.s: 9 1.16.2.2 nathanw * Copyright (c) 1988 University of Utah. 10 1.16.2.2 nathanw * Copyright (c) 1982, 1990 The Regents of the University of California. 11 1.16.2.2 nathanw * sun3/include/asm.h: 12 1.16.2.2 nathanw * Copyright (c) 1993 Adam Glass 13 1.16.2.2 nathanw * Copyright (c) 1990 The Regents of the University of California. 14 1.16.2.2 nathanw * 15 1.16.2.2 nathanw * Redistribution and use in source and binary forms, with or without 16 1.16.2.2 nathanw * modification, are permitted provided that the following conditions 17 1.16.2.2 nathanw * are met: 18 1.16.2.2 nathanw * 1. Redistributions of source code must retain the above copyright 19 1.16.2.2 nathanw * notice, this list of conditions and the following disclaimer. 20 1.16.2.2 nathanw * 2. Redistributions in binary form must reproduce the above copyright 21 1.16.2.2 nathanw * notice, this list of conditions and the following disclaimer in the 22 1.16.2.2 nathanw * documentation and/or other materials provided with the distribution. 23 1.16.2.2 nathanw * 3. All advertising materials mentioning features or use of this software 24 1.16.2.2 nathanw * must display the following acknowledgement: 25 1.16.2.2 nathanw * This product includes software developed by the University of 26 1.16.2.2 nathanw * California, Berkeley and its contributors. 27 1.16.2.2 nathanw * 4. Neither the name of the University nor the names of its contributors 28 1.16.2.2 nathanw * may be used to endorse or promote products derived from this software 29 1.16.2.2 nathanw * without specific prior written permission. 30 1.16.2.2 nathanw * 31 1.16.2.2 nathanw * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 32 1.16.2.2 nathanw * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 33 1.16.2.2 nathanw * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 34 1.16.2.2 nathanw * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 35 1.16.2.2 nathanw * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 1.16.2.2 nathanw * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 1.16.2.2 nathanw * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 1.16.2.2 nathanw * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 39 1.16.2.2 nathanw * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 40 1.16.2.2 nathanw * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 41 1.16.2.2 nathanw * SUCH DAMAGE. 42 1.16.2.2 nathanw */ 43 1.16.2.2 nathanw 44 1.16.2.2 nathanw #ifndef _ASM_H_ 45 1.16.2.2 nathanw #define _ASM_H_ 46 1.16.2.2 nathanw 47 1.16.2.2 nathanw #ifndef _LOCORE 48 1.16.2.2 nathanw #define _LOCORE 49 1.16.2.2 nathanw #endif 50 1.16.2.2 nathanw #include <machine/frame.h> 51 1.16.2.2 nathanw 52 1.16.2.2 nathanw #ifdef __arch64__ 53 1.16.2.2 nathanw #ifndef __ELF__ 54 1.16.2.2 nathanw #define __ELF__ 55 1.16.2.2 nathanw #endif 56 1.16.2.2 nathanw #endif 57 1.16.2.2 nathanw 58 1.16.2.2 nathanw /* Pull in CCFSZ, CC64FSZ, and BIAS from frame.h */ 59 1.16.2.2 nathanw #ifndef _LOCORE 60 1.16.2.2 nathanw #define _LOCORE 61 1.16.2.2 nathanw #endif 62 1.16.2.2 nathanw #include <machine/frame.h> 63 1.16.2.2 nathanw 64 1.16.2.2 nathanw #ifdef __ELF__ 65 1.16.2.2 nathanw #define _C_LABEL(name) name 66 1.16.2.2 nathanw #else 67 1.16.2.2 nathanw #ifdef __STDC__ 68 1.16.2.2 nathanw #define _C_LABEL(name) _ ## name 69 1.16.2.2 nathanw #else 70 1.16.2.2 nathanw #define _C_LABEL(name) _/**/name 71 1.16.2.2 nathanw #endif 72 1.16.2.2 nathanw #endif 73 1.16.2.2 nathanw #define _ASM_LABEL(name) name 74 1.16.2.2 nathanw 75 1.16.2.2 nathanw #ifdef PIC 76 1.16.2.2 nathanw /* 77 1.16.2.2 nathanw * PIC_PROLOGUE() is akin to the compiler generated function prologue for 78 1.16.2.2 nathanw * PIC code. It leaves the address of the Global Offset Table in DEST, 79 1.16.2.2 nathanw * clobbering register TMP in the process. 80 1.16.2.2 nathanw * 81 1.16.2.2 nathanw * We can use two code sequences. We can read the %pc or use the call 82 1.16.2.2 nathanw * instruction that saves the pc in %o7. Call requires the branch unit and 83 1.16.2.2 nathanw * IEU1, and clobbers %o7 which needs to be restored. This instruction 84 1.16.2.2 nathanw * sequence takes about 4 cycles due to instruction interdependence. Reading 85 1.16.2.2 nathanw * the pc takes 4 cycles to dispatch and is always dispatched alone. That 86 1.16.2.2 nathanw * sequence takes 7 cycles. 87 1.16.2.2 nathanw */ 88 1.16.2.2 nathanw #define PIC_PROLOGUE(dest,tmp) \ 89 1.16.2.2 nathanw mov %o7, tmp; \ 90 1.16.2.2 nathanw sethi %hi(_GLOBAL_OFFSET_TABLE_-4),dest; \ 91 1.16.2.2 nathanw call 0f; \ 92 1.16.2.2 nathanw or dest,%lo(_GLOBAL_OFFSET_TABLE_+4),dest; \ 93 1.16.2.2 nathanw 0: \ 94 1.16.2.2 nathanw add dest,%o7,dest; \ 95 1.16.2.2 nathanw mov tmp, %o7 96 1.16.2.2 nathanw 97 1.16.2.2 nathanw /* 98 1.16.2.2 nathanw * PICCY_SET() does the equivalent of a `set var, %dest' instruction in 99 1.16.2.2 nathanw * a PIC-like way, but without involving the Global Offset Table. This 100 1.16.2.2 nathanw * only works for VARs defined in the same file *and* in the text segment. 101 1.16.2.2 nathanw */ 102 1.16.2.2 nathanw #define PICCY_SET(var,dest,tmp) \ 103 1.16.2.2 nathanw 3: rd %pc, tmp; add tmp,(var-3b),dest 104 1.16.2.2 nathanw #else 105 1.16.2.2 nathanw #define PIC_PROLOGUE(dest,tmp) 106 1.16.2.2 nathanw #define PICCY_OFFSET(var,dest,tmp) 107 1.16.2.2 nathanw #endif 108 1.16.2.2 nathanw 109 1.16.2.2 nathanw #define FTYPE(x) .type x,@function 110 1.16.2.2 nathanw #define OTYPE(x) .type x,@object 111 1.16.2.2 nathanw 112 1.16.2.2 nathanw #define _ENTRY(name) \ 113 1.16.2.2 nathanw .align 4; .globl name; .proc 1; FTYPE(name); name: 114 1.16.2.2 nathanw 115 1.16.2.2 nathanw #ifdef GPROF 116 1.16.2.2 nathanw /* see _MCOUNT_ENTRY in profile.h */ 117 1.16.2.2 nathanw #ifdef __ELF__ 118 1.16.2.2 nathanw #define _PROF_PROLOGUE \ 119 1.16.2.2 nathanw .data; .align 8; 1: .uaword 0; .uaword 0; \ 120 1.16.2.2 nathanw .text; save %sp,-CC64FSZ,%sp; sethi %hi(1b),%o0; call _mcount; \ 121 1.16.2.2 nathanw or %o0,%lo(1b),%o0; restore 122 1.16.2.2 nathanw #else 123 1.16.2.2 nathanw #define _PROF_PROLOGUE \ 124 1.16.2.2 nathanw .data; .align 8; 1: .uaword 0; .uaword 0; \ 125 1.16.2.2 nathanw .text; save %sp,-CC64FSZ,%sp; sethi %hi(1b),%o0; call mcount; \ 126 1.16.2.2 nathanw or %o0,%lo(1b),%o0; restore 127 1.16.2.2 nathanw #endif 128 1.16.2.2 nathanw #else 129 1.16.2.2 nathanw #define _PROF_PROLOGUE 130 1.16.2.2 nathanw #endif 131 1.16.2.2 nathanw 132 1.16.2.2 nathanw #define ENTRY(name) _ENTRY(_C_LABEL(name)); _PROF_PROLOGUE 133 1.16.2.2 nathanw #define ASENTRY(name) _ENTRY(_ASM_LABEL(name)); _PROF_PROLOGUE 134 1.16.2.2 nathanw #define FUNC(name) ASENTRY(name) 135 1.16.2.2 nathanw #define RODATA(name) .align 4; .text; .globl _C_LABEL(name); \ 136 1.16.2.2 nathanw OTYPE(_C_LABEL(name)); _C_LABEL(name): 137 1.16.2.2 nathanw 138 1.16.2.2 nathanw 139 1.16.2.2 nathanw #define ASMSTR .asciz 140 1.16.2.2 nathanw 141 1.16.2.2 nathanw #define RCSID(name) .asciz name 142 1.16.2.2 nathanw 143 1.16.2.2 nathanw #ifdef __ELF__ 144 1.16.2.2 nathanw #define WEAK_ALIAS(alias,sym) \ 145 1.16.2.2 nathanw .weak alias; \ 146 1.16.2.2 nathanw alias = sym 147 1.16.2.2 nathanw #endif 148 1.16.2.2 nathanw 149 1.16.2.2 nathanw /* 150 1.16.2.2 nathanw * WARN_REFERENCES: create a warning if the specified symbol is referenced. 151 1.16.2.2 nathanw */ 152 1.16.2.2 nathanw #ifdef __ELF__ 153 1.16.2.2 nathanw #ifdef __STDC__ 154 1.16.2.2 nathanw #define WARN_REFERENCES(_sym,_msg) \ 155 1.16.2.2 nathanw .section .gnu.warning. ## _sym ; .ascii _msg ; .text 156 1.16.2.2 nathanw #else 157 1.16.2.2 nathanw #define WARN_REFERENCES(_sym,_msg) \ 158 1.16.2.2 nathanw .section .gnu.warning./**/_sym ; .ascii _msg ; .text 159 1.16.2.2 nathanw #endif /* __STDC__ */ 160 1.16.2.2 nathanw #else 161 1.16.2.2 nathanw #ifdef __STDC__ 162 1.16.2.2 nathanw #define __STRING(x) #x 163 1.16.2.2 nathanw #define WARN_REFERENCES(sym,msg) \ 164 1.16.2.2 nathanw .stabs msg ## ,30,0,0,0 ; \ 165 1.16.2.2 nathanw .stabs __STRING(_ ## sym) ## ,1,0,0,0 166 1.16.2.2 nathanw #else 167 1.16.2.2 nathanw #define __STRING(x) "x" 168 1.16.2.2 nathanw #define WARN_REFERENCES(sym,msg) \ 169 1.16.2.2 nathanw .stabs msg,30,0,0,0 ; \ 170 1.16.2.2 nathanw .stabs __STRING(_/**/sym),1,0,0,0 171 1.16.2.2 nathanw #endif /* __STDC__ */ 172 1.16.2.2 nathanw #endif /* __ELF__ */ 173 1.16.2.2 nathanw 174 1.16.2.2 nathanw #endif /* _ASM_H_ */ 175
Indexes created Thu Oct 02 14:10:14 GMT 2025