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Annotation of 43BSDReno/pgrm/dbx/asm.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1983 The Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that: (1) source distributions retain this entire copyright
        !             7:  * notice and comment, and (2) distributions including binaries display
        !             8:  * the following acknowledgement:  ``This product includes software
        !             9:  * developed by the University of California, Berkeley and its contributors''
        !            10:  * in the documentation or other materials provided with the distribution
        !            11:  * and in all advertising materials mentioning features or use of this
        !            12:  * software. Neither the name of the University nor the names of its
        !            13:  * contributors may be used to endorse or promote products derived
        !            14:  * from this software without specific prior written permission.
        !            15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            18:  */
        !            19: 
        !            20: #ifndef lint
        !            21: static char sccsid[] = "@(#)asm.c      5.4 (Berkeley) 6/1/90";
        !            22: #endif /* not lint */
        !            23: 
        !            24: /*
        !            25:  * Assembly language dependent symbol routines.
        !            26:  */
        !            27: 
        !            28: #include "defs.h"
        !            29: #include "symbols.h"
        !            30: #include "asm.h"
        !            31: #include "languages.h"
        !            32: #include "tree.h"
        !            33: #include "eval.h"
        !            34: #include "operators.h"
        !            35: #include "mappings.h"
        !            36: #include "process.h"
        !            37: #include "runtime.h"
        !            38: #include "machine.h"
        !            39: 
        !            40: #define isdouble(range) ( \
        !            41:     range->symvalue.rangev.upper == 0 and range->symvalue.rangev.lower > 0 \
        !            42: )
        !            43: 
        !            44: /*
        !            45:  * Initialize assembly language information.
        !            46:  */
        !            47: 
        !            48: public asm_init()
        !            49: {
        !            50:     Language lang;
        !            51: 
        !            52:     lang = language_define("assembler", ".s");
        !            53:     language_setop(lang, L_PRINTDECL, asm_printdecl);
        !            54:     language_setop(lang, L_PRINTVAL, asm_printval);
        !            55:     language_setop(lang, L_TYPEMATCH, asm_typematch);
        !            56:     language_setop(lang, L_BUILDAREF, asm_buildaref);
        !            57:     language_setop(lang, L_EVALAREF, asm_evalaref);
        !            58:     language_setop(lang, L_MODINIT, asm_modinit);
        !            59:     language_setop(lang, L_HASMODULES, asm_hasmodules);
        !            60:     language_setop(lang, L_PASSADDR, asm_passaddr);
        !            61: }
        !            62: 
        !            63: /*
        !            64:  * Test if two types are compatible.
        !            65:  */
        !            66: 
        !            67: public Boolean asm_typematch(type1, type2)
        !            68: Symbol type1, type2;
        !            69: {
        !            70:     Boolean b;
        !            71: 
        !            72:     b = false;
        !            73:     return b;
        !            74: }
        !            75: 
        !            76: public asm_printdecl(s)
        !            77: Symbol s;
        !            78: {
        !            79:     switch (s->class) {
        !            80:        case CONST:
        !            81:            printf("%s = %d", symname(s), s->symvalue.constval->value.lcon);
        !            82:            break;
        !            83: 
        !            84:        case VAR:
        !            85:        case REF:
        !            86:            printf("&%s = 0x%x", symname(s), s->symvalue.offset);
        !            87:            break;
        !            88: 
        !            89:        case PROC:
        !            90:        case FUNC:
        !            91:            printf("%s (0x%x):", symname(s), codeloc(s));
        !            92:            break;
        !            93: 
        !            94:        case TYPE:
        !            95:            printf("%s", symname(s));
        !            96:            break;
        !            97: 
        !            98:        case ARRAY:
        !            99:            printf("$string");
        !           100:            break;
        !           101: 
        !           102:        default:
        !           103:            printf("[%s]", classname(s));
        !           104:            break;
        !           105:     }
        !           106:     putchar('\n');
        !           107: }
        !           108: 
        !           109: /*
        !           110:  * Print out the value on the top of the expression stack
        !           111:  * in the format for the type of the given symbol.
        !           112:  */
        !           113: 
        !           114: public asm_printval(s)
        !           115: register Symbol s;
        !           116: {
        !           117:     register Symbol t;
        !           118:     register Integer len;
        !           119: 
        !           120:     switch (s->class) {
        !           121:        case ARRAY:
        !           122:            t = rtype(s->type);
        !           123:            if (t->class == RANGE and istypename(t->type, "$char")) {
        !           124:                len = size(s);
        !           125:                sp -= len;
        !           126:                printf("\"%.*s\"", len, sp);
        !           127:            } else {
        !           128:                printarray(s);
        !           129:            }
        !           130:            break;
        !           131: 
        !           132:        default:
        !           133:            printf("0x%x", pop(Integer));
        !           134:            break;
        !           135:     }
        !           136: }
        !           137: 
        !           138: /*
        !           139:  * Treat subscripting as indirection through pointer to integer.
        !           140:  */
        !           141: 
        !           142: public Node asm_buildaref(a, slist)
        !           143: Node a, slist;
        !           144: {
        !           145:     Symbol t, eltype;
        !           146:     Node p, r;
        !           147: 
        !           148:     t = rtype(a->nodetype);
        !           149:     eltype = t->type;
        !           150:     p = slist->value.arg[0];
        !           151:     r = build(O_MUL, p, build(O_LCON, (long) size(eltype)));
        !           152:     r = build(O_ADD, build(O_RVAL, a), r);
        !           153:     r->nodetype = eltype;
        !           154:     return r;
        !           155: }
        !           156: 
        !           157: /*
        !           158:  * Evaluate a subscript index.  Assumes dimension is [0..n].
        !           159:  */
        !           160: 
        !           161: public asm_evalaref(s, base, i)
        !           162: Symbol s;
        !           163: Address base;
        !           164: long i;
        !           165: {
        !           166:     Symbol t;
        !           167: 
        !           168:     t = rtype(s);
        !           169:     push(long, base + i * size(t->type));
        !           170: }
        !           171: 
        !           172: public asm_modinit (typetable)
        !           173: Symbol typetable[];
        !           174: {
        !           175:     /* nothing for right now */
        !           176: }
        !           177: 
        !           178: public boolean asm_hasmodules ()
        !           179: {
        !           180:     return false;
        !           181: }
        !           182: 
        !           183: public boolean asm_passaddr (param, exprtype)
        !           184: Symbol param, exprtype;
        !           185: {
        !           186:     return false;
        !           187: }

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