1 /* $NetBSD: asm.h,v 1.12 2001/11/03 20:24:42 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1994 Allen Briggs 5 * All rights reserved. 6 * 7 * Gleaned from locore.s and sun3 asm.h which had the following copyrights: 8 * locore.s: 9 * Copyright (c) 1988 University of Utah. 10 * Copyright (c) 1982, 1990 The Regents of the University of California. 11 * sun3/include/asm.h: 12 * Copyright (c) 1993 Adam Glass 13 * Copyright (c) 1990 The Regents of the University of California. 14 * 15 * Redistribution and use in source and binary forms, with or without 16 * modification, are permitted provided that the following conditions 17 * are met: 18 * 1. Redistributions of source code must retain the above copyright 19 * notice, this list of conditions and the following disclaimer. 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in the 22 * documentation and/or other materials provided with the distribution. 23 * 3. All advertising materials mentioning features or use of this software 24 * must display the following acknowledgement: 25 * This product includes software developed by the University of 26 * California, Berkeley and its contributors. 27 * 4. Neither the name of the University nor the names of its contributors 28 * may be used to endorse or promote products derived from this software 29 * without specific prior written permission. 30 * 31 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 32 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 33 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 34 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 35 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 39 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 40 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 41 * SUCH DAMAGE. 42 */ 43 44 #ifndef _ASM_H_ 45 #define _ASM_H_ 46 47 #ifdef __ELF__ 48 #define _C_LABEL(name) name 49 #else 50 #ifdef __STDC__ 51 #define _C_LABEL(name) _ ## name 52 #else 53 #define _C_LABEL(name) _/**/name 54 #endif 55 #endif 56 #define _ASM_LABEL(name) name 57 58 #ifdef PIC 59 /* 60 * PIC_PROLOGUE() is akin to the compiler generated function prologue for 61 * PIC code. It leaves the address of the Global Offset Table in DEST, 62 * clobbering register TMP in the process. Using the temporary enables us 63 * to work without a stack frame (doing so requires saving %o7) . 64 */ 65 #define PIC_PROLOGUE(dest,tmp) \ 66 mov %o7,tmp; 3: call 4f; nop; 4: \ 67 sethi %hi(_C_LABEL(_GLOBAL_OFFSET_TABLE_)-(3b-.)),dest; \ 68 or dest,%lo(_C_LABEL(_GLOBAL_OFFSET_TABLE_)-(3b-.)),dest; \ 69 add dest,%o7,dest; mov tmp,%o7 70 71 /* 72 * PICCY_SET() does the equivalent of a `set var, %dest' instruction in 73 * a PIC-like way, but without involving the Global Offset Table. This 74 * only works for VARs defined in the same file *and* in the text segment. 75 */ 76 #define PICCY_SET(var,dest,tmp) \ 77 mov %o7,tmp; 3: call 4f; nop; 4: \ 78 add %o7,(var-3b),dest; mov tmp,%o7 79 #else 80 #define PIC_PROLOGUE(dest,tmp) 81 #define PICCY_OFFSET(var,dest,tmp) 82 #endif 83 84 #define FTYPE(x) .type x,@function 85 #define OTYPE(x) .type x,@object 86 87 #define _ENTRY(name) \ 88 .align 4; .globl name; .proc 1; FTYPE(name); name: 89 90 #ifdef GPROF 91 /* see _MCOUNT_ENTRY in profile.h */ 92 #ifdef __ELF__ 93 #define _PROF_PROLOGUE \ 94 .data; .align 4; 1: .long 0; \ 95 .text; save %sp,-96,%sp; sethi %hi(1b),%o0; call _mcount; \ 96 or %o0,%lo(1b),%o0; restore 97 #else 98 #define _PROF_PROLOGUE \ 99 .data; .align 4; 1: .long 0; \ 100 .text; save %sp,-96,%sp; sethi %hi(1b),%o0; call mcount; \ 101 or %o0,%lo(1b),%o0; restore 102 #endif 103 #else 104 #define _PROF_PROLOGUE 105 #endif 106 107 #define ENTRY(name) _ENTRY(_C_LABEL(name)); _PROF_PROLOGUE 108 #define ASENTRY(name) _ENTRY(_ASM_LABEL(name)); _PROF_PROLOGUE 109 #define FUNC(name) ASENTRY(name) 110 #define RODATA(name) .align 4; .text; .globl _C_LABEL(name); \ 111 OTYPE(_C_LABEL(name)); _C_LABEL(name): 112 113 114 #define ASMSTR .asciz 115 116 #define RCSID(name) .asciz name 117 118 #ifdef __ELF__ 119 #define WEAK_ALIAS(alias,sym) \ 120 .weak alias; \ 121 alias = sym 122 #endif 123 124 #ifdef __STDC__ 125 #define __STRING(x) #x 126 #define WARN_REFERENCES(sym,msg) \ 127 .stabs msg ## ,30,0,0,0 ; \ 128 .stabs __STRING(_ ## sym) ## ,1,0,0,0 129 #else 130 #define __STRING(x) "x" 131 #define WARN_REFERENCES(sym,msg) \ 132 .stabs msg,30,0,0,0 ; \ 133 .stabs __STRING(_/**/sym),1,0,0,0 134 #endif /* __STDC__ */ 135 136 #endif /* _ASM_H_ */ 137