Mercurial > repos > blastem
annotate dis.c @ 522:6a14c5a95648
Adjust PSG and YM-2612 volume to be closer to the real console
author | Michael Pavone <pavone@retrodev.com> |
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date | Tue, 11 Feb 2014 12:52:28 -0800 |
parents | 140af5509ce7 |
children | 316facea756d de6f00204fa2 |
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 "68kinst.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[(16*1024*1024)/16]; |
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11 uint8_t label[(16*1024*1024)/8]; |
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12 |
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13 void visit(uint32_t address) |
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14 { |
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15 address &= 0xFFFFFF; |
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16 visited[address/16] |= 1 << ((address / 2) % 8); |
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17 } |
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18 |
134 | 19 void reference(uint32_t address) |
20 { | |
21 address &= 0xFFFFFF; | |
22 //printf("referenced: %X\n", address); | |
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23 label[address/16] |= 1 << (address % 8); |
134 | 24 } |
25 | |
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26 uint8_t is_visited(uint32_t address) |
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27 { |
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28 address &= 0xFFFFFF; |
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29 return visited[address/16] & (1 << ((address / 2) % 8)); |
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30 } |
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31 |
134 | 32 uint8_t is_label(uint32_t address) |
33 { | |
34 address &= 0xFFFFFF; | |
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35 return label[address/16] & (1 << (address % 8)); |
134 | 36 } |
37 | |
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38 typedef struct deferred { |
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39 uint32_t address; |
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40 struct deferred *next; |
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41 } deferred; |
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42 |
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43 deferred * defer(uint32_t address, deferred * next) |
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44 { |
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45 if (is_visited(address)) { |
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46 return next; |
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47 } |
111 | 48 //printf("deferring %X\n", address); |
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49 deferred * d = malloc(sizeof(deferred)); |
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50 d->address = address; |
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51 d->next = next; |
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52 return d; |
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53 } |
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54 |
134 | 55 void check_reference(m68kinst * inst, m68k_op_info * op) |
56 { | |
57 switch(op->addr_mode) | |
58 { | |
59 case MODE_PC_DISPLACE: | |
60 reference(inst->address + 2 + op->params.regs.displacement); | |
61 break; | |
62 case MODE_ABSOLUTE: | |
63 case MODE_ABSOLUTE_SHORT: | |
64 reference(op->params.immed); | |
65 break; | |
66 } | |
67 } | |
68 | |
69 uint8_t labels = 0; | |
70 uint8_t addr = 0; | |
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71 uint8_t only = 0; |
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72 |
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73 int main(int argc, char ** argv) |
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74 { |
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75 long filesize; |
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76 unsigned short *filebuf; |
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77 char disbuf[1024]; |
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78 m68kinst instbuf; |
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79 unsigned short * cur; |
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80 FILE * f = fopen(argv[1], "rb"); |
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81 fseek(f, 0, SEEK_END); |
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82 filesize = ftell(f); |
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83 fseek(f, 0, SEEK_SET); |
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84 filebuf = malloc(filesize); |
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85 fread(filebuf, 2, filesize/2, f); |
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86 fclose(f); |
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87 deferred *def = NULL, *tmpd; |
134 | 88 for(uint8_t opt = 2; opt < argc; ++opt) { |
89 if (argv[opt][0] == '-') { | |
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90 FILE * address_log; |
134 | 91 switch (argv[opt][1]) |
92 { | |
93 case 'l': | |
94 labels = 1; | |
95 break; | |
96 case 'a': | |
97 addr = 1; | |
98 break; | |
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99 case 'o': |
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100 only = 1; |
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101 break; |
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102 case 'f': |
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103 opt++; |
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104 if (opt >= argc) { |
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105 fputs("-f must be followed by a filename\n", stderr); |
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106 exit(1); |
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107 } |
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108 address_log = fopen(argv[opt], "r"); |
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109 if (!address_log) { |
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110 fprintf(stderr, "Failed to open %s for reading\n", argv[opt]); |
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111 exit(1); |
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112 } |
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113 while (fgets(disbuf, sizeof(disbuf), address_log)) { |
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114 if (disbuf[0]) { |
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115 uint32_t address = strtol(disbuf, NULL, 16); |
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116 if (address) { |
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117 def = defer(address, def); |
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118 reference(address); |
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119 } |
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120 } |
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121 } |
134 | 122 } |
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123 } else { |
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124 uint32_t address = strtol(argv[opt], NULL, 16); |
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125 def = defer(address, def); |
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126 reference(address); |
134 | 127 } |
128 } | |
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129 for(cur = filebuf; cur - filebuf < (filesize/2); ++cur) |
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130 { |
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131 *cur = (*cur >> 8) | (*cur << 8); |
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132 } |
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133 uint32_t start = filebuf[2] << 16 | filebuf[3], tmp_addr; |
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134 uint32_t int_2 = filebuf[0x68/2] << 16 | filebuf[0x6A/2]; |
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135 uint32_t int_4 = filebuf[0x70/2] << 16 | filebuf[0x72/2]; |
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136 uint32_t int_6 = filebuf[0x78/2] << 16 | filebuf[0x7A/2]; |
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137 uint16_t *encoded, *next; |
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138 uint32_t size; |
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139 if (!def || !only) { |
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140 def = defer(start, def); |
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141 def = defer(int_2, def); |
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142 def = defer(int_4, def); |
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143 def = defer(int_6, def); |
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144 } |
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145 uint32_t address; |
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146 while(def) { |
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147 do { |
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148 encoded = NULL; |
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149 address = def->address; |
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150 if (!is_visited(address)) { |
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151 encoded = filebuf + address/2; |
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152 } |
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153 tmpd = def; |
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154 def = def->next; |
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155 free(tmpd); |
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156 } while(def && encoded == NULL); |
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157 if (!encoded) { |
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158 break; |
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159 } |
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160 for(;;) { |
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161 if (address > filesize) { |
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162 break; |
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163 } |
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164 visit(address); |
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165 next = m68k_decode(encoded, &instbuf, address); |
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166 address += (next-encoded)*2; |
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167 encoded = next; |
111 | 168 //m68k_disasm(&instbuf, disbuf); |
169 //printf("%X: %s\n", instbuf.address, disbuf); | |
134 | 170 check_reference(&instbuf, &(instbuf.src)); |
171 check_reference(&instbuf, &(instbuf.dst)); | |
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172 if (instbuf.op == M68K_ILLEGAL || instbuf.op == M68K_RTS || instbuf.op == M68K_RTE || instbuf.op == M68K_INVALID) { |
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173 break; |
164
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174 } |
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175 if (instbuf.op == M68K_BCC || instbuf.op == M68K_DBCC || instbuf.op == M68K_BSR) { |
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176 if (instbuf.op == M68K_BCC && instbuf.extra.cond == COND_TRUE) { |
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177 address = instbuf.address + 2 + instbuf.src.params.immed; |
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178 encoded = filebuf + address/2; |
134 | 179 reference(address); |
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180 if (is_visited(address)) { |
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181 break; |
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182 } |
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183 } else { |
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184 tmp_addr = instbuf.address + 2 + instbuf.src.params.immed; |
134 | 185 reference(tmp_addr); |
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186 def = defer(tmp_addr, def); |
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187 } |
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188 } else if(instbuf.op == M68K_JMP) { |
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189 if (instbuf.src.addr_mode == MODE_ABSOLUTE || instbuf.src.addr_mode == MODE_ABSOLUTE_SHORT) { |
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190 address = instbuf.src.params.immed; |
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191 encoded = filebuf + address/2; |
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192 if (is_visited(address)) { |
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193 break; |
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194 } |
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195 } else if (instbuf.src.addr_mode = MODE_PC_DISPLACE) { |
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196 address = instbuf.src.params.regs.displacement + instbuf.address + 2; |
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197 encoded = filebuf + address/2; |
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198 if (is_visited(address)) { |
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199 break; |
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200 } |
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201 } else { |
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202 break; |
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203 } |
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204 } else if(instbuf.op == M68K_JSR) { |
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205 if (instbuf.src.addr_mode == MODE_ABSOLUTE || instbuf.src.addr_mode == MODE_ABSOLUTE_SHORT) { |
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206 def = defer(instbuf.src.params.immed, def); |
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207 } else if (instbuf.src.addr_mode == MODE_PC_DISPLACE) { |
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208 def = defer(instbuf.src.params.regs.displacement + instbuf.address + 2, def); |
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209 } |
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210 } |
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211 } |
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212 } |
134 | 213 if (labels) { |
214 for (address = filesize; address < (16*1024*1024); address++) { | |
215 if (is_label(address)) { | |
216 printf("ADR_%X equ $%X\n", address, address); | |
217 } | |
218 } | |
219 puts(""); | |
220 } | |
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221 for (address = 0; address < filesize; address+=2) { |
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222 if (is_visited(address)) { |
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223 encoded = filebuf + address/2; |
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224 m68k_decode(encoded, &instbuf, address); |
134 | 225 if (labels) { |
226 m68k_disasm_labels(&instbuf, disbuf); | |
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227 if (address == start) { |
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228 puts("start:"); |
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229 } |
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230 if(address == int_2) { |
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231 puts("int_2:"); |
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232 } |
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233 if(address == int_4) { |
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234 puts("int_4:"); |
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235 } |
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236 if(address == int_6) { |
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237 puts("int_6:"); |
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238 } |
134 | 239 if (is_label(instbuf.address)) { |
240 printf("ADR_%X:\n", instbuf.address); | |
241 } | |
242 if (addr) { | |
243 printf("\t%s\t;%X\n", disbuf, instbuf.address); | |
244 } else { | |
245 printf("\t%s\n", disbuf); | |
246 } | |
247 } else { | |
248 m68k_disasm(&instbuf, disbuf); | |
249 printf("%X: %s\n", instbuf.address, disbuf); | |
250 } | |
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251 } |
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252 } |
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253 return 0; |
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254 } |