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annotate zdis.c @ 313:a13329645ea3

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Fix terminal instruction detection in disassembler
author Mike Pavone <pavone@retrodev.com>
date Thu, 09 May 2013 19:24:18 -0700
parents 852b8765bba6
children 54c0e5f22198
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
199
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1 #include "z80inst.h"
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2 #include <stdio.h>
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3 #include <stdlib.h>
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4
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5 uint8_t visited[(64*1024)/8];
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6 uint8_t label[(64*1024)/8];
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7
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8 void visit(uint16_t address)
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9 {
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10 visited[address/8] |= 1 << (address % 8);
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11 }
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12
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13 void reference(uint16_t address)
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14 {
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15 //printf("referenced: %X\n", address);
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16 label[address/8] |= 1 << (address % 8);
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17 }
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18
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19 uint8_t is_visited(uint16_t address)
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20 {
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21 return visited[address/8] & (1 << (address % 8));
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22 }
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23
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24 uint8_t is_label(uint16_t address)
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25 {
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26 return label[address/8] & (1 << (address % 8));
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27 }
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28
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29 typedef struct deferred {
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30 uint16_t address;
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31 struct deferred *next;
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32 } deferred;
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33
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34 deferred * defer(uint16_t address, deferred * next)
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35 {
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36 if (is_visited(address)) {
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37 return next;
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38 }
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39 //printf("deferring %X\n", address);
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40 deferred * d = malloc(sizeof(deferred));
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41 d->address = address;
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42 d->next = next;
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43 return d;
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44 }
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45
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46 uint8_t labels = 0;
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47 uint8_t addr = 0;
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48 uint8_t only = 0;
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49
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50 int main(int argc, char ** argv)
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51 {
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52 long filesize;
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53 uint8_t *filebuf;
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54 char disbuf[1024];
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55 z80inst instbuf;
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56 uint8_t * cur;
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57 FILE * f = fopen(argv[1], "rb");
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58 fseek(f, 0, SEEK_END);
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59 filesize = ftell(f);
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60 fseek(f, 0, SEEK_SET);
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61 filebuf = malloc(filesize);
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62 fread(filebuf, 1, filesize, f);
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63 fclose(f);
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64 deferred *def = NULL, *tmpd;
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65 for(uint8_t opt = 2; opt < argc; ++opt) {
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66 if (argv[opt][0] == '-') {
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67 FILE * address_log;
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68 switch (argv[opt][1])
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69 {
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70 case 'l':
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71 labels = 1;
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72 break;
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73 case 'a':
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74 addr = 1;
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75 break;
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76 case 'o':
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77 only = 1;
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78 break;
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79 case 'f':
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80 opt++;
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81 if (opt >= argc) {
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82 fputs("-f must be followed by a filename\n", stderr);
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83 exit(1);
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84 }
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85 address_log = fopen(argv[opt], "r");
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86 if (!address_log) {
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87 fprintf(stderr, "Failed to open %s for reading\n", argv[opt]);
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88 exit(1);
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89 }
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90 while (fgets(disbuf, sizeof(disbuf), address_log)) {
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91 if (disbuf[0]) {
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92 uint16_t address = strtol(disbuf, NULL, 16);
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93 if (address) {
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94 def = defer(address, def);
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95 reference(address);
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96 }
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97 }
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98 }
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99 }
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100 } else {
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101 uint16_t address = strtol(argv[opt], NULL, 16);
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102 def = defer(address, def);
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103 reference(address);
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104 }
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105 }
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106 uint16_t start = 0;
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107 uint8_t *encoded, *next;
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108 uint32_t size;
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109 if (!def || !only) {
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110 def = defer(start, def);
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111 }
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112 uint16_t address;
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113 while(def) {
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114 do {
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115 encoded = NULL;
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116 address = def->address;
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117 if (!is_visited(address)) {
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118 encoded = filebuf + address;
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119 }
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120 tmpd = def;
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121 def = def->next;
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122 free(tmpd);
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123 } while(def && encoded == NULL);
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124 if (!encoded) {
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125 break;
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126 }
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127 for(;;) {
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128 if (address > filesize || is_visited(address)) {
199
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129 break;
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130 }
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131 visit(address);
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132 next = z80_decode(encoded, &instbuf);
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133 address += (next-encoded);
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134 encoded = next;
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135
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136 //z80_disasm(&instbuf, disbuf);
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137 //printf("%X: %s\n", address, disbuf);
199
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138 switch (instbuf.op)
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139 {
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140 case Z80_JR:
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141 address += instbuf.immed;
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142 encoded = filebuf + address;
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143 break;
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144 case Z80_JRCC:
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145 reference(address + instbuf.immed);
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146 def = defer(address + instbuf.immed, def);
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147 break;
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148 case Z80_JP:
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149 address = instbuf.immed;
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150 encoded = filebuf + address;
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151 break;
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152 case Z80_JPCC:
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153 case Z80_CALL:
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154 case Z80_CALLCC:
313
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parents: 258
diff changeset
155 case Z80_RST:
199
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156 reference(instbuf.immed);
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157 def = defer(instbuf.immed, def);
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158 break;
313
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parents: 258
diff changeset
159 default:
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parents: 258
diff changeset
160 if (z80_is_terminal(&instbuf)) {
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parents: 258
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161 address = filesize + 1;
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162 }
199
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163 }
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164 }
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165 }
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166 if (labels) {
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167 for (address = filesize; address < (64*1024); address++) {
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168 if (is_label(address)) {
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parents:
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169 printf("ADR_%X equ $%X\n", address, address);
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170 }
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171 }
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parents:
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172 puts("");
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173 }
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parents:
diff changeset
174 for (address = 0; address < filesize; address++) {
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parents:
diff changeset
175 if (is_visited(address)) {
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parents:
diff changeset
176 encoded = filebuf + address;
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parents:
diff changeset
177 z80_decode(encoded, &instbuf);
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parents:
diff changeset
178 if (labels) {
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parents:
diff changeset
179 /*m68k_disasm_labels(&instbuf, disbuf);
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parents:
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180 if (is_label(instbuf.address)) {
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parents:
diff changeset
181 printf("ADR_%X:\n", instbuf.address);
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parents:
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182 }
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parents:
diff changeset
183 if (addr) {
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parents:
diff changeset
184 printf("\t%s\t;%X\n", disbuf, instbuf.address);
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parents:
diff changeset
185 } else {
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parents:
diff changeset
186 printf("\t%s\n", disbuf);
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parents:
diff changeset
187 }*/
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188 } else {
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parents:
diff changeset
189 z80_disasm(&instbuf, disbuf);
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parents:
diff changeset
190 printf("%X: %s\n", address, disbuf);
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parents:
diff changeset
191 }
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parents:
diff changeset
192 }
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parents:
diff changeset
193 }
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parents:
diff changeset
194 return 0;
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
195 }