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annotate zdis.c @ 666:b68039895627

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In theory, the Z80 core should work on 32-bit builds now; however, I suspect there is some code that cannot deal with most of the Z80 registers not having a native register so more work will be needed
author Michael Pavone <pavone@retrodev.com>
date Fri, 02 Jan 2015 13:47:34 -0800
parents 140af5509ce7
children 3eced113081c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
467
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1 /*
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2 Copyright 2013 Michael Pavone
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3 This file is part of BlastEm.
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4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text.
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5 */
199
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6 #include "z80inst.h"
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7 #include <stdio.h>
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8 #include <stdlib.h>
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9
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10 uint8_t visited[(64*1024)/8];
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11 uint8_t label[(64*1024)/8];
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12
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13 void visit(uint16_t address)
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14 {
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15 visited[address/8] |= 1 << (address % 8);
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16 }
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17
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18 void reference(uint16_t address)
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19 {
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20 //printf("referenced: %X\n", address);
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21 label[address/8] |= 1 << (address % 8);
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22 }
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23
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24 uint8_t is_visited(uint16_t address)
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25 {
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26 return visited[address/8] & (1 << (address % 8));
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27 }
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28
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29 uint8_t is_label(uint16_t address)
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30 {
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31 return label[address/8] & (1 << (address % 8));
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32 }
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33
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34 typedef struct deferred {
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35 uint16_t address;
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36 struct deferred *next;
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37 } deferred;
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38
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39 deferred * defer(uint16_t address, deferred * next)
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40 {
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41 if (is_visited(address)) {
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42 return next;
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43 }
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44 //printf("deferring %X\n", address);
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45 deferred * d = malloc(sizeof(deferred));
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46 d->address = address;
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47 d->next = next;
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48 return d;
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49 }
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50
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51 uint8_t labels = 0;
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52 uint8_t addr = 0;
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53 uint8_t only = 0;
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54
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55 int main(int argc, char ** argv)
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56 {
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57 long filesize;
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58 uint8_t *filebuf;
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59 char disbuf[1024];
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60 z80inst instbuf;
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61 uint8_t * cur;
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62 FILE * f = fopen(argv[1], "rb");
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63 fseek(f, 0, SEEK_END);
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64 filesize = ftell(f);
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65 fseek(f, 0, SEEK_SET);
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66 filebuf = malloc(filesize);
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67 fread(filebuf, 1, filesize, f);
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68 fclose(f);
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69 deferred *def = NULL, *tmpd;
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70 for(uint8_t opt = 2; opt < argc; ++opt) {
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71 if (argv[opt][0] == '-') {
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72 FILE * address_log;
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73 switch (argv[opt][1])
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74 {
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75 case 'l':
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76 labels = 1;
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77 break;
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78 case 'a':
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79 addr = 1;
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80 break;
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81 case 'o':
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82 only = 1;
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83 break;
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84 case 'f':
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85 opt++;
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86 if (opt >= argc) {
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87 fputs("-f must be followed by a filename\n", stderr);
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88 exit(1);
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89 }
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90 address_log = fopen(argv[opt], "r");
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91 if (!address_log) {
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92 fprintf(stderr, "Failed to open %s for reading\n", argv[opt]);
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93 exit(1);
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94 }
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95 while (fgets(disbuf, sizeof(disbuf), address_log)) {
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96 if (disbuf[0]) {
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97 uint16_t address = strtol(disbuf, NULL, 16);
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98 if (address) {
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99 def = defer(address, def);
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100 reference(address);
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101 }
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102 }
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103 }
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104 }
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105 } else {
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106 uint16_t address = strtol(argv[opt], NULL, 16);
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107 def = defer(address, def);
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108 reference(address);
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109 }
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110 }
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111 uint16_t start = 0;
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112 uint8_t *encoded, *next;
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113 uint32_t size;
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114 if (!def || !only) {
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115 def = defer(start, def);
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116 }
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117 uint16_t address;
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118 while(def) {
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119 do {
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120 encoded = NULL;
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121 address = def->address;
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122 if (!is_visited(address)) {
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123 encoded = filebuf + address;
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124 }
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125 tmpd = def;
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126 def = def->next;
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127 free(tmpd);
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128 } while(def && encoded == NULL);
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129 if (!encoded) {
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130 break;
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131 }
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132 for(;;) {
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133 if (address > filesize || is_visited(address)) {
199
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134 break;
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135 }
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136 visit(address);
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137 next = z80_decode(encoded, &instbuf);
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138 address += (next-encoded);
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139 encoded = next;
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140
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141 //z80_disasm(&instbuf, disbuf);
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142 //printf("%X: %s\n", address, disbuf);
199
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143 switch (instbuf.op)
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144 {
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145 case Z80_JR:
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146 address += instbuf.immed;
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147 encoded = filebuf + address;
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148 break;
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149 case Z80_JRCC:
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150 reference(address + instbuf.immed);
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151 def = defer(address + instbuf.immed, def);
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152 break;
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153 case Z80_JP:
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154 address = instbuf.immed;
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155 encoded = filebuf + address;
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156 break;
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157 case Z80_JPCC:
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158 case Z80_CALL:
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159 case Z80_CALLCC:
313
a13329645ea3 Fix terminal instruction detection in disassembler
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parents: 258
diff changeset
160 case Z80_RST:
199
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parents:
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161 reference(instbuf.immed);
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162 def = defer(instbuf.immed, def);
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163 break;
313
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parents: 258
diff changeset
164 default:
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parents: 258
diff changeset
165 if (z80_is_terminal(&instbuf)) {
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parents: 258
diff changeset
166 address = filesize + 1;
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diff changeset
167 }
199
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parents:
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168 }
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parents:
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169 }
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
170 }
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
171 if (labels) {
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parents:
diff changeset
172 for (address = filesize; address < (64*1024); address++) {
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parents:
diff changeset
173 if (is_label(address)) {
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
174 printf("ADR_%X equ $%X\n", address, address);
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parents:
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175 }
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
176 }
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parents:
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177 puts("");
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Mike Pavone <pavone@retrodev.com>
parents:
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178 }
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
179 for (address = 0; address < filesize; address++) {
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
180 if (is_visited(address)) {
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parents:
diff changeset
181 encoded = filebuf + address;
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parents:
diff changeset
182 z80_decode(encoded, &instbuf);
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
183 if (labels) {
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parents:
diff changeset
184 /*m68k_disasm_labels(&instbuf, disbuf);
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parents:
diff changeset
185 if (is_label(instbuf.address)) {
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parents:
diff changeset
186 printf("ADR_%X:\n", instbuf.address);
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
187 }
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
188 if (addr) {
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
189 printf("\t%s\t;%X\n", disbuf, instbuf.address);
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parents:
diff changeset
190 } else {
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
191 printf("\t%s\n", disbuf);
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
192 }*/
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
193 } else {
314
54c0e5f22198 Show absolute addresses for JR, JRCC and DJNZ in Z80 disassembler
Mike Pavone <pavone@retrodev.com>
parents: 313
diff changeset
194 z80_disasm(&instbuf, disbuf, address);
199
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
195 printf("%X: %s\n", address, disbuf);
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
196 }
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
197 }
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
198 }
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
199 return 0;
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
200 }