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annotate zdis.c @ 1027:276cd582b728

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Fix PC value pushed to stack for A and F line traps
author Michael Pavone <pavone@retrodev.com>
date Tue, 10 May 2016 21:26:27 -0700
parents a634ed0a92cf
children 137dbd05ceab
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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>
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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
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14 void fatal_error(char *format, ...)
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15 {
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16 va_list args;
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17 va_start(args, format);
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18 vfprintf(stderr, format, args);
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19 va_end(args);
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20 exit(1);
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21 }
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22
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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 break;
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116 case 's':
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117 opt++;
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118 if (opt >= argc) {
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119 fputs("-s must be followed by a start offset in hex\n", stderr);
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120 exit(1);
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121 }
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122 offset = strtol(argv[opt], NULL, 16);
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123 break;
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124 }
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125 } else {
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126 uint16_t address = strtol(argv[opt], NULL, 16);
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127 def = defer(address, def);
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128 reference(address);
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129 }
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130 }
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131 uint16_t start = offset;
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132 uint8_t *encoded, *next;
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133 uint32_t size;
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134 if (!def || !only) {
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135 def = defer(start, def);
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136 }
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137 uint16_t address;
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138 while(def) {
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139 do {
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140 encoded = NULL;
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141 address = def->address;
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142 if (!is_visited(address)) {
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143 encoded = filebuf + address - offset;
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144 }
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145 tmpd = def;
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parents:
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146 def = def->next;
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parents:
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147 free(tmpd);
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parents:
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148 } while(def && encoded == NULL);
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parents:
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149 if (!encoded) {
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150 break;
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151 }
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152 for(;;) {
817
e95978c0988c Added a -s paramter for specifying a start offset in the Z80 disassembler
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parents: 805
diff changeset
153 if ((address - offset) > filesize || is_visited(address) || address < offset) {
199
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parents:
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154 break;
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parents:
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155 }
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156 visit(address);
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157 next = z80_decode(encoded, &instbuf);
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158 address += (next-encoded);
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159 encoded = next;
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160
258
852b8765bba6 Fix infinite loop in Z80 disassembler
Mike Pavone <pavone@retrodev.com>
parents: 199
diff changeset
161 //z80_disasm(&instbuf, disbuf);
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parents: 199
diff changeset
162 //printf("%X: %s\n", address, disbuf);
199
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163 switch (instbuf.op)
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164 {
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165 case Z80_JR:
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166 address += instbuf.immed;
817
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parents: 805
diff changeset
167 encoded = filebuf + address - offset;
199
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168 break;
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parents:
diff changeset
169 case Z80_JRCC:
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parents:
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170 reference(address + instbuf.immed);
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parents:
diff changeset
171 def = defer(address + instbuf.immed, def);
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
172 break;
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
173 case Z80_JP:
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parents:
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174 address = instbuf.immed;
817
e95978c0988c Added a -s paramter for specifying a start offset in the Z80 disassembler
Michael Pavone <pavone@retrodev.com>
parents: 805
diff changeset
175 encoded = filebuf + address - offset;
199
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parents:
diff changeset
176 break;
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
177 case Z80_JPCC:
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parents:
diff changeset
178 case Z80_CALL:
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parents:
diff changeset
179 case Z80_CALLCC:
313
a13329645ea3 Fix terminal instruction detection in disassembler
Mike Pavone <pavone@retrodev.com>
parents: 258
diff changeset
180 case Z80_RST:
199
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parents:
diff changeset
181 reference(instbuf.immed);
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parents:
diff changeset
182 def = defer(instbuf.immed, def);
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Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
183 break;
313
a13329645ea3 Fix terminal instruction detection in disassembler
Mike Pavone <pavone@retrodev.com>
parents: 258
diff changeset
184 default:
a13329645ea3 Fix terminal instruction detection in disassembler
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parents: 258
diff changeset
185 if (z80_is_terminal(&instbuf)) {
a13329645ea3 Fix terminal instruction detection in disassembler
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parents: 258
diff changeset
186 address = filesize + 1;
a13329645ea3 Fix terminal instruction detection in disassembler
Mike Pavone <pavone@retrodev.com>
parents: 258
diff changeset
187 }
199
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parents:
diff changeset
188 }
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
189 }
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
190 }
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
191 if (labels) {
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
192 for (address = filesize; address < (64*1024); address++) {
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
193 if (is_label(address)) {
69585e7d474f Add initial stab at Z80 decoder and disassembler
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parents:
diff changeset
194 printf("ADR_%X equ $%X\n", address, address);
69585e7d474f Add initial stab at Z80 decoder and disassembler
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parents:
diff changeset
195 }
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 puts("");
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
198 }
818
a634ed0a92cf Small fix to start offset support in Z80 disassembler
Michael Pavone <pavone@retrodev.com>
parents: 817
diff changeset
199 for (address = offset; address < filesize + offset; address++) {
199
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
200 if (is_visited(address)) {
817
e95978c0988c Added a -s paramter for specifying a start offset in the Z80 disassembler
Michael Pavone <pavone@retrodev.com>
parents: 805
diff changeset
201 encoded = filebuf + address - offset;
199
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
202 z80_decode(encoded, &instbuf);
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
203 if (labels) {
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
204 /*m68k_disasm_labels(&instbuf, disbuf);
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
205 if (is_label(instbuf.address)) {
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
206 printf("ADR_%X:\n", instbuf.address);
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
207 }
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
208 if (addr) {
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
209 printf("\t%s\t;%X\n", disbuf, instbuf.address);
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
210 } else {
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
211 printf("\t%s\n", disbuf);
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
212 }*/
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
213 } else {
314
54c0e5f22198 Show absolute addresses for JR, JRCC and DJNZ in Z80 disassembler
Mike Pavone <pavone@retrodev.com>
parents: 313
diff changeset
214 z80_disasm(&instbuf, disbuf, address);
199
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
215 printf("%X: %s\n", address, disbuf);
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
216 }
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
217 }
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
218 }
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
219 return 0;
69585e7d474f Add initial stab at Z80 decoder and disassembler
Mike Pavone <pavone@retrodev.com>
parents:
diff changeset
220 }