Mercurial > repos > blastem
annotate zdis.c @ 1913:2c742812bcbb
Fix regression at the very start of The Revenge of Shinobi
author | Michael Pavone <pavone@retrodev.com> |
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date | Wed, 01 Apr 2020 23:15:47 -0700 |
parents | 137dbd05ceab |
children | 92dc3e24f309 |
rev | line source |
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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 */ |
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6 #include "z80inst.h" |
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7 #include <stdio.h> |
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8 #include <stdlib.h> |
805 | 9 #include <stdarg.h> |
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10 |
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11 uint8_t visited[(64*1024)/8]; |
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12 uint8_t label[(64*1024)/8]; |
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13 |
805 | 14 void fatal_error(char *format, ...) |
15 { | |
16 va_list args; | |
17 va_start(args, format); | |
18 vfprintf(stderr, format, args); | |
19 va_end(args); | |
20 exit(1); | |
21 } | |
22 | |
199
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23 void visit(uint16_t address) |
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24 { |
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25 visited[address/8] |= 1 << (address % 8); |
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26 } |
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27 |
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28 void reference(uint16_t address) |
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29 { |
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30 //printf("referenced: %X\n", address); |
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31 label[address/8] |= 1 << (address % 8); |
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32 } |
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33 |
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34 uint8_t is_visited(uint16_t address) |
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35 { |
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36 return visited[address/8] & (1 << (address % 8)); |
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37 } |
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38 |
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39 uint8_t is_label(uint16_t address) |
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40 { |
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41 return label[address/8] & (1 << (address % 8)); |
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42 } |
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43 |
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44 typedef struct deferred { |
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45 uint16_t address; |
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46 struct deferred *next; |
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47 } deferred; |
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48 |
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49 deferred * defer(uint16_t address, deferred * next) |
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50 { |
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51 if (is_visited(address)) { |
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52 return next; |
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53 } |
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54 //printf("deferring %X\n", address); |
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55 deferred * d = malloc(sizeof(deferred)); |
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56 d->address = address; |
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57 d->next = next; |
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58 return d; |
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59 } |
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60 |
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61 uint8_t labels = 0; |
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62 uint8_t addr = 0; |
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63 uint8_t only = 0; |
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64 |
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65 int main(int argc, char ** argv) |
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66 { |
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67 long filesize; |
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68 uint8_t *filebuf; |
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69 char disbuf[1024]; |
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70 z80inst instbuf; |
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71 uint8_t * cur; |
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72 FILE * f = fopen(argv[1], "rb"); |
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73 fseek(f, 0, SEEK_END); |
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74 filesize = ftell(f); |
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75 fseek(f, 0, SEEK_SET); |
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76 filebuf = malloc(filesize); |
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77 fread(filebuf, 1, filesize, f); |
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78 fclose(f); |
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79 deferred *def = NULL, *tmpd; |
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80 uint16_t offset = 0; |
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81 for(uint8_t opt = 2; opt < argc; ++opt) { |
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82 if (argv[opt][0] == '-') { |
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83 FILE * address_log; |
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84 switch (argv[opt][1]) |
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85 { |
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86 case 'l': |
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87 labels = 1; |
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88 break; |
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89 case 'a': |
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90 addr = 1; |
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91 break; |
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92 case 'o': |
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93 only = 1; |
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94 break; |
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95 case 'f': |
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96 opt++; |
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97 if (opt >= argc) { |
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98 fputs("-f must be followed by a filename\n", stderr); |
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99 exit(1); |
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100 } |
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101 address_log = fopen(argv[opt], "r"); |
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102 if (!address_log) { |
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103 fprintf(stderr, "Failed to open %s for reading\n", argv[opt]); |
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104 exit(1); |
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105 } |
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106 while (fgets(disbuf, sizeof(disbuf), address_log)) { |
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107 if (disbuf[0]) { |
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108 uint16_t address = strtol(disbuf, NULL, 16); |
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109 if (address) { |
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110 def = defer(address, def); |
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111 reference(address); |
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112 } |
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113 } |
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114 } |
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115 fclose(address_log); |
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116 break; |
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117 case 's': |
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118 opt++; |
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119 if (opt >= argc) { |
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120 fputs("-s must be followed by a start offset in hex\n", stderr); |
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121 exit(1); |
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122 } |
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123 offset = strtol(argv[opt], NULL, 16); |
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124 break; |
199
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125 } |
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126 } else { |
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127 uint16_t address = strtol(argv[opt], NULL, 16); |
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128 def = defer(address, def); |
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129 reference(address); |
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130 } |
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131 } |
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132 uint16_t start = offset; |
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133 uint8_t *encoded, *next; |
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134 uint32_t size; |
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135 if (!def || !only) { |
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136 def = defer(start, def); |
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137 } |
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138 uint16_t address; |
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139 while(def) { |
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140 do { |
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141 encoded = NULL; |
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142 address = def->address; |
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143 if (!is_visited(address)) { |
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144 encoded = filebuf + address - offset; |
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145 } |
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146 tmpd = def; |
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147 def = def->next; |
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148 free(tmpd); |
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149 } while(def && encoded == NULL); |
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150 if (!encoded) { |
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151 break; |
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152 } |
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153 for(;;) { |
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154 if ((address - offset) > filesize || is_visited(address) || address < offset) { |
199
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155 break; |
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156 } |
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157 visit(address); |
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158 next = z80_decode(encoded, &instbuf); |
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159 address += (next-encoded); |
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160 encoded = next; |
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161 |
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162 //z80_disasm(&instbuf, disbuf); |
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163 //printf("%X: %s\n", address, disbuf); |
199
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164 switch (instbuf.op) |
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165 { |
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166 case Z80_JR: |
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167 address += instbuf.immed; |
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168 encoded = filebuf + address - offset; |
199
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169 break; |
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170 case Z80_JRCC: |
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171 reference(address + instbuf.immed); |
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172 def = defer(address + instbuf.immed, def); |
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173 break; |
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174 case Z80_JP: |
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175 address = instbuf.immed; |
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176 encoded = filebuf + address - offset; |
199
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177 break; |
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178 case Z80_JPCC: |
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179 case Z80_CALL: |
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180 case Z80_CALLCC: |
313
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181 case Z80_RST: |
199
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182 reference(instbuf.immed); |
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183 def = defer(instbuf.immed, def); |
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184 break; |
313
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185 default: |
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186 if (z80_is_terminal(&instbuf)) { |
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187 address = filesize + 1; |
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188 } |
199
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189 } |
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190 } |
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191 } |
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192 if (labels) { |
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193 for (address = filesize; address < (64*1024); address++) { |
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194 if (is_label(address)) { |
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195 printf("ADR_%X equ $%X\n", address, address); |
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196 } |
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197 } |
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198 puts(""); |
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199 } |
818
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200 for (address = offset; address < filesize + offset; address++) { |
199
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201 if (is_visited(address)) { |
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202 encoded = filebuf + address - offset; |
199
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203 z80_decode(encoded, &instbuf); |
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204 if (labels) { |
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205 /*m68k_disasm_labels(&instbuf, disbuf); |
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206 if (is_label(instbuf.address)) { |
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207 printf("ADR_%X:\n", instbuf.address); |
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208 } |
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209 if (addr) { |
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210 printf("\t%s\t;%X\n", disbuf, instbuf.address); |
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211 } else { |
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212 printf("\t%s\n", disbuf); |
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213 }*/ |
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214 } else { |
314
54c0e5f22198
Show absolute addresses for JR, JRCC and DJNZ in Z80 disassembler
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313
diff
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|
215 z80_disasm(&instbuf, disbuf, address); |
199
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216 printf("%X: %s\n", address, disbuf); |
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217 } |
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218 } |
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219 } |
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220 return 0; |
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221 } |