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Annotation of 43BSDTahoe/ucb/dbx/asm.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1983 Regents of the University of California.
                      3:  * All rights reserved.  The Berkeley software License Agreement
                      4:  * specifies the terms and conditions for redistribution.
                      5:  */
                      6: 
                      7: #ifndef lint
                      8: static char sccsid[] = "@(#)asm.c      5.2 (Berkeley) 1/11/88";
                      9: #endif not lint
                     10: 
                     11: static char rcsid[] = "$Header: asm.c,v 1.2 87/03/25 19:24:09 donn Exp $";
                     12: 
                     13: /*
                     14:  * Assembly language dependent symbol routines.
                     15:  */
                     16: 
                     17: #include "defs.h"
                     18: #include "symbols.h"
                     19: #include "asm.h"
                     20: #include "languages.h"
                     21: #include "tree.h"
                     22: #include "eval.h"
                     23: #include "operators.h"
                     24: #include "mappings.h"
                     25: #include "process.h"
                     26: #include "runtime.h"
                     27: #include "machine.h"
                     28: 
                     29: #define isdouble(range) ( \
                     30:     range->symvalue.rangev.upper == 0 and range->symvalue.rangev.lower > 0 \
                     31: )
                     32: 
                     33: /*
                     34:  * Initialize assembly language information.
                     35:  */
                     36: 
                     37: public asm_init()
                     38: {
                     39:     Language lang;
                     40: 
                     41:     lang = language_define("assembler", ".s");
                     42:     language_setop(lang, L_PRINTDECL, asm_printdecl);
                     43:     language_setop(lang, L_PRINTVAL, asm_printval);
                     44:     language_setop(lang, L_TYPEMATCH, asm_typematch);
                     45:     language_setop(lang, L_BUILDAREF, asm_buildaref);
                     46:     language_setop(lang, L_EVALAREF, asm_evalaref);
                     47:     language_setop(lang, L_MODINIT, asm_modinit);
                     48:     language_setop(lang, L_HASMODULES, asm_hasmodules);
                     49:     language_setop(lang, L_PASSADDR, asm_passaddr);
                     50: }
                     51: 
                     52: /*
                     53:  * Test if two types are compatible.
                     54:  */
                     55: 
                     56: public Boolean asm_typematch(type1, type2)
                     57: Symbol type1, type2;
                     58: {
                     59:     Boolean b;
                     60: 
                     61:     b = false;
                     62:     return b;
                     63: }
                     64: 
                     65: public asm_printdecl(s)
                     66: Symbol s;
                     67: {
                     68:     switch (s->class) {
                     69:        case CONST:
                     70:            printf("%s = %d", symname(s), s->symvalue.constval->value.lcon);
                     71:            break;
                     72: 
                     73:        case VAR:
                     74:        case REF:
                     75:            printf("&%s = 0x%x", symname(s), s->symvalue.offset);
                     76:            break;
                     77: 
                     78:        case PROC:
                     79:        case FUNC:
                     80:            printf("%s (0x%x):", symname(s), codeloc(s));
                     81:            break;
                     82: 
                     83:        case TYPE:
                     84:            printf("%s", symname(s));
                     85:            break;
                     86: 
                     87:        case ARRAY:
                     88:            printf("$string");
                     89:            break;
                     90: 
                     91:        default:
                     92:            printf("[%s]", classname(s));
                     93:            break;
                     94:     }
                     95:     putchar('\n');
                     96: }
                     97: 
                     98: /*
                     99:  * Print out the value on the top of the expression stack
                    100:  * in the format for the type of the given symbol.
                    101:  */
                    102: 
                    103: public asm_printval(s)
                    104: register Symbol s;
                    105: {
                    106:     register Symbol t;
                    107:     register Integer len;
                    108: 
                    109:     switch (s->class) {
                    110:        case ARRAY:
                    111:            t = rtype(s->type);
                    112:            if (t->class == RANGE and istypename(t->type, "$char")) {
                    113:                len = size(s);
                    114:                sp -= len;
                    115:                printf("\"%.*s\"", len, sp);
                    116:            } else {
                    117:                printarray(s);
                    118:            }
                    119:            break;
                    120: 
                    121:        default:
                    122:            printf("0x%x", pop(Integer));
                    123:            break;
                    124:     }
                    125: }
                    126: 
                    127: /*
                    128:  * Treat subscripting as indirection through pointer to integer.
                    129:  */
                    130: 
                    131: public Node asm_buildaref(a, slist)
                    132: Node a, slist;
                    133: {
                    134:     Symbol t, eltype;
                    135:     Node p, r;
                    136: 
                    137:     t = rtype(a->nodetype);
                    138:     eltype = t->type;
                    139:     p = slist->value.arg[0];
                    140:     r = build(O_MUL, p, build(O_LCON, (long) size(eltype)));
                    141:     r = build(O_ADD, build(O_RVAL, a), r);
                    142:     r->nodetype = eltype;
                    143:     return r;
                    144: }
                    145: 
                    146: /*
                    147:  * Evaluate a subscript index.  Assumes dimension is [0..n].
                    148:  */
                    149: 
                    150: public asm_evalaref(s, base, i)
                    151: Symbol s;
                    152: Address base;
                    153: long i;
                    154: {
                    155:     Symbol t;
                    156: 
                    157:     t = rtype(s);
                    158:     push(long, base + i * size(t->type));
                    159: }
                    160: 
                    161: public asm_modinit (typetable)
                    162: Symbol typetable[];
                    163: {
                    164:     /* nothing for right now */
                    165: }
                    166: 
                    167: public boolean asm_hasmodules ()
                    168: {
                    169:     return false;
                    170: }
                    171: 
                    172: public boolean asm_passaddr (param, exprtype)
                    173: Symbol param, exprtype;
                    174: {
                    175:     return false;
                    176: }

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