4.3BSD - /usr/src/ucb/pascal/pdx/machine/printinst.c

   1: /*
   2:  * Copyright (c) 1980 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[] = "@(#)printinst.c	5.1 (Berkeley) 6/6/85";
   9: #endif not lint
  10: /*
  11:  * decode and print the instructions
  12:  */
  13: 
  14: #include "defs.h"
  15: #include "machine.h"
  16: #include "process.h"
  17: #include "pxops.h"
  18: #include "optab.h"
  19: #include "object.h"
  20: 
  21: LOCAL ADDRESS printop(), docase();
  22: 
  23: /*
  24:  * print instructions within the given address range
  25:  */
  26: 
  27: printinst(lowaddr, highaddr)
  28: ADDRESS lowaddr;
  29: ADDRESS highaddr;
  30: {
  31:     register ADDRESS addr;
  32: 
  33:     for (addr = lowaddr; addr <= highaddr; ) {
  34:     addr = printop(addr);
  35:     }
  36: }
  37: 
  38: /*
  39:  * print count instructions from given address
  40:  */
  41: 
  42: printninst(count, addr)
  43: int count;
  44: ADDRESS addr;
  45: {
  46:     int i;
  47: 
  48:     for (i = 0; i < count; i++) {
  49:     addr = printop(addr);
  50:     }
  51: }
  52: 
  53: /*
  54:  * print the opcode at the given address, return the address
  55:  * of the next instruction
  56:  */
  57: 
  58: LOCAL ADDRESS printop(addr)
  59: register ADDRESS addr;
  60: {
  61:     int i;
  62:     PXOP op;
  63:     OPTAB *o;
  64:     char subop;
  65:     short arg;
  66:     long longarg;
  67:     union {
  68:     short i;
  69:     struct { char c1, c2; } opword;
  70:     } u;
  71: 
  72:     iread(&u.i, addr, sizeof(u.i));
  73:     op = (PXOP) u.opword.c1;
  74:     subop = u.opword.c2;
  75:     o = &optab[op];
  76:     printf("%5d   %s", addr, o->opname);
  77:     addr += sizeof(u);
  78:     for (i = 0; o->argtype[i] != 0; i++) {
  79:     if (i == 0) {
  80:         putchar('\t');
  81:     } else {
  82:         putchar(',');
  83:     }
  84:     switch(o->argtype[i]) {
  85:         case ADDR4:
  86:         case LWORD:
  87:         iread(&longarg, addr, sizeof(longarg));
  88:         printf("%d", longarg);
  89:         addr += sizeof(long);
  90:         break;
  91: 
  92:         case SUBOP:
  93:         printf("%d", subop);
  94:         break;
  95: 
  96:         case ADDR2:
  97:         case DISP:
  98:         case PSUBOP:
  99:         case VLEN:
 100:         case HWORD:
 101:         if (i != 0 || subop == 0) {
 102:             iread(&arg, addr, sizeof(arg));
 103:             addr += sizeof(short);
 104:         } else {
 105:             arg = subop;
 106:         }
 107:         printf("%d", arg);
 108:         break;
 109: 
 110:         case STRING: {
 111:         char c;
 112: 
 113:         putchar('\'');
 114:         while (subop > 0) {
 115:             iread(&c, addr, sizeof(c));
 116:             if (c == '\0') {
 117:             break;
 118:             }
 119:             putchar(c);
 120:             subop--;
 121:             addr++;
 122:         }
 123:         addr++;
 124:         putchar('\'');
 125:         if ((addr&1) != 0) {
 126:             addr++;
 127:         }
 128:         break;
 129:         }
 130: 
 131:         default:
 132:         panic("bad argtype %d", o->argtype[i]);
 133:         /*NOTREACHED*/
 134:     }
 135:     }
 136:     switch(op) {
 137:     case O_CON:
 138:         addr += arg;
 139:         break;
 140: 
 141:     case O_CASE1OP:
 142:         addr = docase(addr, 1, subop);
 143:         break;
 144: 
 145:     case O_CASE2OP:
 146:         addr = docase(addr, 2, subop);
 147:         break;
 148: 
 149:     case O_CASE4OP:
 150:         addr = docase(addr, 4, subop);
 151:         break;
 152:     }
 153:     putchar('\n');
 154:     return(addr);
 155: }
 156: 
 157: /*
 158:  * print out the destinations and cases
 159:  */
 160: 
 161: LOCAL ADDRESS docase(addr, size, n)
 162: ADDRESS addr;
 163: int size;
 164: int n;
 165: {
 166:     register int i;
 167:     char c;
 168:     short arg;
 169:     long longarg;
 170: 
 171:     iread(&arg, addr, sizeof(arg));
 172:     printf("\n\t%5d", arg);
 173:     addr += 2;
 174:     for (i = 1; i < n; i++) {
 175:     iread(&arg, addr, sizeof(arg));
 176:     printf(", %5d", arg);
 177:     addr += 2;
 178:     }
 179:     printf("\n\t");
 180:     for (i = 0; i < n; i++) {
 181:     switch(size) {
 182:         case 1:
 183:         iread(&c, addr, sizeof(c));
 184:         printf("%5d", c);
 185:         break;
 186: 
 187:         case 2:
 188:         iread(&arg, addr, sizeof(arg));
 189:         printf("%5d", arg);
 190:         break;
 191: 
 192:         case 4:
 193:         iread(&longarg, addr, sizeof(longarg));
 194:         printf("%5d", longarg);
 195:         break;
 196:     }
 197:     addr += size;
 198:     if (i < n - 1) {
 199:         printf(", ");
 200:     }
 201:     }
 202:     if ((addr&01) == 01) {
 203:     addr++;
 204:     }
 205:     return(addr);
 206: }

Defined functions

Defined variables