Mercurial > hg > forks > dxa
annotate scan.c @ 14:84c0facfc43c
Merge changes from upstream v0.1.4.
| author | Matti Hamalainen <ccr@tnsp.org> |
|---|---|
| date | Thu, 14 Oct 2021 01:38:52 +0300 |
| parents | fe4d840c13eb |
| children | a2a81589380d |
| rev | line source |
|---|---|
| 0 | 1 /*\ |
|
14
84c0facfc43c
Merge changes from upstream v0.1.4.
Matti Hamalainen <ccr@tnsp.org>
parents:
11
diff
changeset
|
2 * dxa -- symbolic 65xx disassembler |
| 0 | 3 * |
| 4 * Copyright (C) 1993, 1994 Marko M\"akel\"a | |
|
14
84c0facfc43c
Merge changes from upstream v0.1.4.
Matti Hamalainen <ccr@tnsp.org>
parents:
11
diff
changeset
|
5 * Copyright (C) 2019 Cameron Kaiser |
| 0 | 6 * |
| 7 * This program is free software; you can redistribute it and/or modify | |
| 8 * it under the terms of the GNU General Public License as published by | |
| 9 * the Free Software Foundation; either version 2 of the License, or | |
| 10 * (at your option) any later version. | |
| 11 * | |
| 12 * This program is distributed in the hope that it will be useful, | |
| 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 * GNU General Public License for more details. | |
| 16 * | |
| 17 * You should have received a copy of the GNU General Public License | |
| 18 * along with this program; if not, write to the Free Software | |
| 19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
| 20 * | |
| 21 \*/ | |
| 22 | |
| 23 #define _SCAN_C_ | |
| 24 #include <stdio.h> | |
| 25 #include "proto.h" | |
| 26 #include "opcodes.h" | |
| 27 #include "options.h" | |
| 28 | |
| 29 | |
| 30 int ScanSure (ADDR_T scanstart) | |
| 31 { | |
| 32 ADDR_T address, addr; | |
| 33 opcodes *instr; | |
| 34 | |
| 35 unsigned int size, counter; | |
|
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Merge changes from upstream v0.1.4.
Matti Hamalainen <ccr@tnsp.org>
parents:
11
diff
changeset
|
36 if (fVerbose) |
|
84c0facfc43c
Merge changes from upstream v0.1.4.
Matti Hamalainen <ccr@tnsp.org>
parents:
11
diff
changeset
|
37 fprintf(stderr, "\n%s: scanning sure section $%04x", prog, scanstart); |
| 0 | 38 |
| 39 for (address = scanstart;; address += size) { | |
| 40 if (GetMemFlag (address)) /* rest of routine not valid */ | |
| 41 return ((Options & M_DATA_BLOCKS) == O_DBL_STRICT); | |
| 42 | |
| 43 instr = &opset[Memory[address]]; | |
| 44 | |
| 45 if (!instr->mnemonic) /* invalid opcode */ | |
| 46 return ((Options & M_DATA_BLOCKS) == O_DBL_STRICT); | |
| 47 | |
| 48 size = sizes[instr->admode]; | |
| 49 if ((ADDR_T)(address + size - StartAddress) > | |
| 50 (ADDR_T)(EndAddress - StartAddress)) | |
| 51 break; /* end of program code encountered */ | |
| 52 | |
| 53 switch (GetMemType (address)) { | |
| 54 case MEM_INSTRUCTION: | |
| 55 return 0; /* The rest of the routine has already been processed. */ | |
| 56 | |
| 57 case MEM_DATA: | |
| 58 AddEntry (address, scanstart, WRN_INSTR_WRITTEN_TO); | |
| 59 break; | |
| 60 | |
| 61 case MEM_PARAMETER: | |
| 62 AddEntry (address, scanstart, WRN_PARAM_JUMPED_TO); | |
| 63 } | |
| 64 | |
| 65 SetMemType (address, MEM_INSTRUCTION); | |
| 66 | |
| 67 for (counter = size, addr = address + 1; --counter; addr++) | |
| 68 switch GetMemType(addr) { | |
| 69 case MEM_INSTRUCTION: | |
| 70 AddEntry (addr, scanstart, WRN_PARAM_JUMPED_TO); | |
| 71 break; | |
| 72 case MEM_DATA: | |
| 73 AddEntry (addr, scanstart, WRN_PARAM_WRITTEN_TO); | |
| 74 /* fall through */ | |
| 75 default: | |
| 76 SetMemType (addr, MEM_PARAMETER); | |
| 77 } | |
| 78 | |
| 79 if (instr->admode == zrel) { | |
| 80 addr = Memory[(ADDR_T)(address + 1)]; | |
| 81 | |
| 82 if (GetMemFlag (addr) && GetMemType (addr) == MEM_UNPROCESSED) | |
| 83 return (Options & M_DATA_BLOCKS) == O_DBL_STRICT; | |
| 84 | |
| 85 if (((ADDR_T)(addr - StartAddress) < | |
| 86 (ADDR_T)(EndAddress - StartAddress) || | |
| 87 Options & B_LBL_ALWAYS)) { | |
|
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Implement reference checking to reduce outputting of useless labels.
Matti Hamalainen <ccr@tnsp.org>
parents:
9
diff
changeset
|
88 |
| 0 | 89 PutLabel (addr); |
|
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Implement reference checking to reduce outputting of useless labels.
Matti Hamalainen <ccr@tnsp.org>
parents:
9
diff
changeset
|
90 PutReference (addr); |
| 0 | 91 PutLowByte (addr); |
| 92 PutHighByte (addr); | |
| 93 } | |
| 94 | |
| 95 addr = (ADDR_T)((int)(char)Memory[(ADDR_T)(address + 2)] + | |
| 96 address + size); | |
| 97 goto IsJump; | |
| 98 } | |
| 99 | |
| 100 if (instr->admode == rel) { | |
| 101 addr = (ADDR_T)((int)(char)Memory[(ADDR_T)(address + 1)] + | |
| 102 address + size); | |
| 103 | |
| 104 goto IsJump; | |
| 105 } | |
| 106 if ((instr->mnemonic == S_JSR || instr->mnemonic == S_JMP) && | |
| 107 instr->admode == abso) { | |
| 108 addr = Memory[(ADDR_T)(address + 1)] + | |
| 109 (Memory[(ADDR_T)(address + 2)] << 8); | |
| 110 | |
| 111 IsJump: | |
| 112 if (GetMemFlag (addr)) | |
| 113 return ((Options & M_DATA_BLOCKS) == O_DBL_STRICT); | |
| 114 | |
| 115 if ((ADDR_T)(addr - StartAddress) < | |
| 116 (ADDR_T)(EndAddress - StartAddress)) { | |
| 117 if (GetMemType (addr) == MEM_INSTRUCTION) { | |
| 118 PutLabel (addr); | |
|
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Implement reference checking to reduce outputting of useless labels.
Matti Hamalainen <ccr@tnsp.org>
parents:
9
diff
changeset
|
119 PutReference (addr); |
| 0 | 120 PutLowByte (addr); |
| 121 PutHighByte (addr); | |
| 122 } | |
| 123 else | |
| 124 AddEntry (addr, scanstart, Options & B_SCEPTIC && | |
| 125 instr->admode == rel && instr->mnemonic != S_BRA ? | |
| 126 RTN_POTENTIAL : RTN_SURE); | |
| 127 } | |
| 128 else if (Options & B_LBL_ALWAYS) { | |
| 129 PutLabel (addr); | |
|
11
fe4d840c13eb
Implement reference checking to reduce outputting of useless labels.
Matti Hamalainen <ccr@tnsp.org>
parents:
9
diff
changeset
|
130 PutReference (addr); |
| 0 | 131 PutLowByte (addr); |
| 132 PutHighByte (addr); | |
| 133 } | |
| 134 | |
| 135 if ((Options & M_DATA_BLOCKS) == O_DBL_STRICT && | |
| 136 Options & B_JMP_STRICT && | |
| 137 addr == address && instr->mnemonic != S_BVC) | |
| 138 return 1; | |
| 139 } | |
| 140 | |
| 141 switch (instr->mnemonic) { | |
| 142 case S_JMP: | |
| 143 addr = Memory[(ADDR_T)(address + 1)] + | |
| 144 (Memory[(ADDR_T)(address + 2)] << 8); | |
| 145 | |
| 146 if (instr->admode == iabs && (ADDR_T)(addr - StartAddress) < | |
| 147 (ADDR_T)(EndAddress - StartAddress)) { | |
| 148 PutLabel (addr); | |
|
11
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Implement reference checking to reduce outputting of useless labels.
Matti Hamalainen <ccr@tnsp.org>
parents:
9
diff
changeset
|
149 PutReference (addr); |
| 0 | 150 PutLowByte (addr); |
| 151 PutHighByte (addr); | |
| 152 | |
| 153 /* Mark pointer as data. */ | |
| 154 switch (GetMemType (addr)) { | |
| 155 case MEM_UNPROCESSED: | |
| 156 SetMemType (addr, MEM_DATA); | |
| 157 break; | |
| 158 case MEM_INSTRUCTION: | |
| 159 AddEntry (addr, scanstart, WRN_INSTR_WRITTEN_TO); | |
| 160 break; | |
| 161 case MEM_PARAMETER: | |
| 162 AddEntry (addr, scanstart, WRN_PARAM_WRITTEN_TO); | |
| 163 break; | |
| 164 } | |
| 165 | |
| 166 addr++; | |
| 167 | |
| 168 if ((ADDR_T)(addr - StartAddress) < | |
| 169 (ADDR_T)(EndAddress - StartAddress)) | |
| 170 switch (GetMemType (addr)) { | |
| 171 case MEM_UNPROCESSED: | |
| 172 SetMemType (addr, MEM_DATA); | |
| 173 break; | |
| 174 case MEM_INSTRUCTION: | |
| 175 AddEntry (addr, scanstart, WRN_INSTR_WRITTEN_TO); | |
| 176 break; | |
| 177 case MEM_PARAMETER: | |
| 178 AddEntry (addr, scanstart, WRN_PARAM_WRITTEN_TO); | |
| 179 break; | |
| 180 } | |
| 181 } | |
| 182 else if (Options & B_LBL_ALWAYS) { | |
| 183 PutLabel (addr); | |
|
11
fe4d840c13eb
Implement reference checking to reduce outputting of useless labels.
Matti Hamalainen <ccr@tnsp.org>
parents:
9
diff
changeset
|
184 PutReference (addr); |
| 0 | 185 PutLowByte (addr); |
| 186 PutHighByte (addr); | |
| 187 } | |
| 9 | 188 return 0; |
| 189 | |
| 0 | 190 case S_BRA: |
| 191 case S_RTS: | |
| 192 case S_RTI: | |
| 193 return 0; | |
| 194 | |
| 195 case S_BRK: | |
| 196 case S_STP: | |
| 197 return (Options & M_DATA_BLOCKS) == O_DBL_STRICT && | |
| 198 Options & B_BRK_REJECT; | |
| 199 } | |
| 200 | |
| 201 if (instr->admode == rel) { | |
| 202 if ((ADDR_T)(addr - scanstart) >= (ADDR_T)(address - scanstart) | |
| 203 || GetMemType (addr) != MEM_INSTRUCTION) { | |
| 204 if (GetMemType (address + size) != MEM_INSTRUCTION) | |
| 205 AddEntry (address + size, scanstart, RTN_POTENTIAL); | |
| 206 | |
| 207 return 0; | |
| 208 } | |
| 209 | |
| 210 continue; | |
| 211 } | |
| 212 | |
| 213 if (instr->mnemonic == S_JSR) { | |
| 214 if (!(Options & B_STK_BALANCE)) { | |
| 215 if (GetMemType (address + size) != MEM_INSTRUCTION) | |
| 216 AddEntry (address + size, scanstart, RTN_POTENTIAL); | |
| 217 | |
| 218 return 0; | |
| 219 } | |
| 220 | |
| 221 continue; | |
| 222 } | |
| 223 | |
| 224 switch (size) { | |
| 225 case 2: | |
| 226 addr = Memory[(ADDR_T)(address + 1)]; | |
| 227 break; | |
| 228 case 3: | |
| 229 addr = Memory[(ADDR_T)(address + 1)] + | |
| 230 (Memory[(ADDR_T)(address + 2)] << 8); | |
| 231 break; | |
| 232 } | |
| 233 | |
| 234 if (types[instr->admode] != impimm && GetMemFlag (addr) && | |
| 235 GetMemType (addr) == MEM_UNPROCESSED) | |
| 236 return (Options & M_DATA_BLOCKS) == O_DBL_STRICT; | |
| 237 | |
| 238 if (types[instr->admode] != impimm && | |
| 239 ((ADDR_T)(addr - StartAddress) < | |
| 240 (ADDR_T)(EndAddress - StartAddress) || | |
| 241 Options & B_LBL_ALWAYS)) { | |
| 242 PutLabel (addr); | |
|
11
fe4d840c13eb
Implement reference checking to reduce outputting of useless labels.
Matti Hamalainen <ccr@tnsp.org>
parents:
9
diff
changeset
|
243 PutReference (addr); |
| 0 | 244 PutLowByte (addr); |
| 245 PutHighByte (addr); | |
| 246 } | |
| 247 | |
| 248 if (types[instr->admode] != other && types[instr->admode] != impimm) { | |
| 249 if ((ADDR_T)(addr - StartAddress) < | |
| 250 (ADDR_T)(EndAddress - StartAddress)) { | |
| 251 switch (GetMemType (addr)) { | |
| 252 case MEM_UNPROCESSED: | |
| 253 SetMemType (addr, MEM_DATA); | |
| 254 break; | |
| 255 case MEM_INSTRUCTION: | |
| 256 AddEntry (addr, scanstart, WRN_INSTR_WRITTEN_TO); | |
| 257 break; | |
| 258 case MEM_PARAMETER: | |
| 259 AddEntry (addr, scanstart, WRN_PARAM_WRITTEN_TO); | |
| 260 break; | |
| 261 } | |
| 262 | |
| 263 if (types[instr->admode] == absindir) { /* indirect mode */ | |
| 264 addr++; /* set flags for upper vector byte */ | |
| 265 | |
| 266 if ((ADDR_T)(addr - StartAddress) < | |
| 267 (ADDR_T)(EndAddress - StartAddress)) | |
| 268 switch (GetMemType (addr)) { | |
| 269 case MEM_UNPROCESSED: | |
| 270 SetMemType (addr, MEM_DATA); | |
| 271 break; | |
| 272 case MEM_INSTRUCTION: | |
| 273 AddEntry (addr, scanstart, WRN_INSTR_WRITTEN_TO); | |
| 274 break; | |
| 275 case MEM_PARAMETER: | |
| 276 AddEntry (addr, scanstart, WRN_PARAM_WRITTEN_TO); | |
| 277 break; | |
| 278 } | |
| 279 } | |
| 280 } | |
| 281 } | |
| 282 } | |
| 283 | |
| 284 /* end of program (unexpectedly) encountered */ | |
| 285 | |
| 286 if (Options & O_DBL_STRICT) return 1; | |
| 287 | |
| 288 AddEntry (EndAddress, scanstart, WRN_RTN_TRUNCATED); | |
| 289 return 0; | |
| 290 } | |
| 291 | |
|
2
ec2f8f6f1dc9
Cleanup pass #1: Get rid of some ancient K&R-isms.
Matti Hamalainen <ccr@tnsp.org>
parents:
1
diff
changeset
|
292 |
| 0 | 293 int ScanPotential (ADDR_T scanstart) |
| 294 { | |
| 295 ADDR_T address, addr; | |
| 296 opcodes *instr; | |
| 297 | |
| 298 unsigned int size, counter; | |
| 299 | |
| 300 for (address = scanstart;; address += size) { | |
| 301 if (GetMemFlag (address)) /* rest of routine not valid */ | |
| 302 return 1; | |
| 303 | |
| 304 instr = &opset[Memory[address]]; | |
| 305 | |
| 306 if (!instr->mnemonic) { /* invalid opcode */ | |
| 307 SetMemFlag (address); | |
| 308 | |
| 309 if (GetMemType (address) == MEM_UNPROCESSED) | |
| 310 SetMemType (address, MEM_DATA); | |
| 311 return 1; | |
| 312 } | |
| 313 | |
| 314 size = sizes[instr->admode]; | |
| 315 if ((ADDR_T)(address + size - StartAddress) > | |
| 316 (ADDR_T)(EndAddress - StartAddress)) | |
| 317 break; /* end of program code encountered */ | |
| 318 | |
| 319 if (GetMemType (address) == MEM_INSTRUCTION) | |
| 320 return 0; /* The rest of the routine has already been processed. */ | |
| 321 | |
| 322 if (instr->admode == zrel) { | |
| 323 addr = Memory[(ADDR_T)(address + 1)]; | |
| 324 | |
| 325 if (GetMemFlag (addr) && GetMemType (addr) == MEM_UNPROCESSED) | |
| 326 goto Failure; | |
| 327 | |
| 328 if (((ADDR_T)(addr - StartAddress) < | |
| 329 (ADDR_T)(EndAddress - StartAddress) || | |
| 330 Options & B_LBL_ALWAYS)) | |
| 331 AddEntry (addr, scanstart, WRN_I_LABEL_NEEDED | WRN_B_TEMPORARY); | |
| 332 | |
| 333 addr = (ADDR_T)((int)(char)Memory[(ADDR_T)(address + 1)] + | |
| 334 address + size); | |
| 335 | |
| 336 goto IsJump; | |
| 337 } | |
| 338 | |
| 339 if (instr->admode == rel) { | |
| 340 addr = (ADDR_T)((int)(char)Memory[(ADDR_T)(address + 1)] + | |
| 341 address + size); | |
| 342 | |
| 343 goto IsJump; | |
| 344 } | |
| 345 | |
| 346 switch (size) { | |
| 347 case 2: | |
| 348 addr = Memory[(ADDR_T)(address + 1)]; | |
| 349 break; | |
| 350 case 3: | |
| 351 addr = Memory[(ADDR_T)(address + 1)] + | |
| 352 (Memory[(ADDR_T)(address + 2)] << 8); | |
| 353 break; | |
| 354 default: | |
| 355 addr = address; | |
| 356 } | |
| 357 | |
| 358 if (types[instr->admode] != impimm && GetMemFlag (addr) && | |
| 359 GetMemType (addr) == MEM_UNPROCESSED) { | |
| 360 Failure: | |
| 361 SetMemFlag (address); | |
| 362 | |
| 363 if (GetMemType (address) == MEM_UNPROCESSED) | |
| 364 SetMemType (address, MEM_DATA); | |
| 365 return 1; | |
| 366 } | |
| 367 | |
| 368 if ((instr->mnemonic == S_JSR || instr->mnemonic == S_JMP) && | |
| 369 instr->admode == abso) { | |
| 370 IsJump: | |
| 371 if (GetMemFlag (addr)) { | |
| 372 SetMemFlag (address); | |
| 373 | |
| 374 if (GetMemType (address) == MEM_UNPROCESSED) | |
| 375 SetMemType (address, MEM_DATA); | |
| 376 return 1; | |
| 377 } | |
| 378 | |
| 379 if ((ADDR_T)(addr - StartAddress) < | |
| 380 (ADDR_T)(EndAddress - StartAddress)) | |
| 381 AddEntry (addr, scanstart, Options & B_SCEPTIC && | |
| 382 instr->admode == rel && instr->mnemonic != S_BRA ? | |
| 383 RTN_SUSP_POT : RTN_SUSPECTED); | |
| 384 else if (Options & B_LBL_ALWAYS) | |
| 385 AddEntry (addr, scanstart, WRN_I_LABEL_NEEDED | WRN_B_TEMPORARY); | |
| 386 | |
| 387 if (Options & B_JMP_STRICT && addr == address && | |
| 388 instr->mnemonic != S_BVC) { | |
| 389 SetMemFlag (address); | |
| 390 | |
| 391 if (GetMemType (address) == MEM_UNPROCESSED) | |
| 392 SetMemType (address, MEM_DATA); | |
| 393 return 1; | |
| 394 } | |
| 395 } | |
| 396 | |
| 397 switch (instr->mnemonic) { | |
| 398 case S_BRK: | |
| 399 case S_STP: | |
| 400 if (Options & B_BRK_REJECT) { | |
| 401 SetMemFlag (address); | |
| 402 | |
| 403 if (GetMemType (address) == MEM_UNPROCESSED) | |
| 404 SetMemType (address, MEM_DATA); | |
| 405 return 1; | |
| 406 } | |
| 407 } | |
| 408 | |
| 409 if (!GetMemFlag (address)) | |
| 410 switch (GetMemType (address)) { | |
| 411 case MEM_DATA: | |
| 412 AddEntry (address, scanstart, WRN_INSTR_WRITTEN_TO | WRN_B_TEMPORARY); | |
| 413 break; | |
| 414 | |
| 415 case MEM_PARAMETER: | |
| 416 AddEntry (address, scanstart, WRN_PARAM_JUMPED_TO | WRN_B_TEMPORARY); | |
| 417 } | |
| 418 | |
| 419 SetMemType (address, MEM_INSTRUCTION); | |
| 420 | |
| 421 for (counter = size, addr = address + 1; --counter; addr++) | |
| 422 switch (GetMemType (addr)) { | |
| 423 case MEM_INSTRUCTION: | |
| 424 AddEntry (addr, scanstart, WRN_PARAM_JUMPED_TO | WRN_B_TEMPORARY); | |
| 425 break; | |
| 426 case MEM_DATA: | |
| 427 if (!GetMemFlag (addr)) | |
| 428 AddEntry (addr, scanstart, WRN_PARAM_WRITTEN_TO | WRN_B_TEMPORARY); | |
| 429 break; | |
| 430 default: | |
| 431 SetMemType (addr, MEM_PARAMETER); | |
| 432 } | |
| 433 | |
| 434 switch (instr->mnemonic) { | |
| 435 case S_BRK: | |
| 436 case S_STP: | |
| 437 case S_RTS: | |
| 438 case S_BRA: | |
| 439 case S_RTI: | |
| 440 return 0; | |
| 441 | |
| 442 case S_JMP: | |
| 443 addr = Memory[(ADDR_T)(address + 1)] + | |
| 444 (Memory[(ADDR_T)(address + 2)] << 8); | |
| 445 | |
| 446 if (instr->admode == iabs && (ADDR_T)(addr - StartAddress) < | |
| 447 (ADDR_T)(EndAddress - StartAddress)) { | |
| 448 AddEntry (addr, scanstart, WRN_I_LABEL_NEEDED | WRN_B_TEMPORARY); | |
| 449 | |
| 450 /* Mark pointer as data. */ | |
| 451 switch (GetMemType (addr)) { | |
| 452 case MEM_UNPROCESSED: | |
| 453 AddEntry (addr, scanstart, WRN_I_ACCESSED | WRN_B_TEMPORARY); | |
| 454 break; | |
| 455 case MEM_INSTRUCTION: | |
| 456 AddEntry (addr, scanstart, WRN_INSTR_WRITTEN_TO | WRN_B_TEMPORARY); | |
| 457 break; | |
| 458 case MEM_PARAMETER: | |
| 459 AddEntry (addr, scanstart, WRN_PARAM_WRITTEN_TO | WRN_B_TEMPORARY); | |
| 460 break; | |
| 461 } | |
| 462 | |
| 463 addr++; | |
| 464 | |
| 465 if ((ADDR_T)(addr - StartAddress) < | |
| 466 (ADDR_T)(EndAddress - StartAddress)) | |
| 467 switch (GetMemType (addr)) { | |
| 468 case MEM_UNPROCESSED: | |
| 469 AddEntry (addr, scanstart, WRN_I_ACCESSED | WRN_B_TEMPORARY); | |
| 470 break; | |
| 471 case MEM_INSTRUCTION: | |
| 472 AddEntry (addr, scanstart, | |
| 473 WRN_INSTR_WRITTEN_TO | WRN_B_TEMPORARY); | |
| 474 break; | |
| 475 case MEM_PARAMETER: | |
| 476 AddEntry (addr, scanstart, | |
| 477 WRN_PARAM_WRITTEN_TO | WRN_B_TEMPORARY); | |
| 478 break; | |
| 479 } | |
| 480 } | |
| 481 else if (Options & B_LBL_ALWAYS) | |
| 482 AddEntry (addr, scanstart, WRN_I_LABEL_NEEDED | WRN_B_TEMPORARY); | |
| 483 | |
| 484 return 0; | |
| 485 } | |
| 486 | |
| 487 if (instr->admode == rel && | |
| 488 GetMemType (address + size) != MEM_INSTRUCTION) { | |
| 489 AddEntry (address + size, scanstart, RTN_SUSP_POT); | |
| 490 | |
| 491 return 0; | |
| 492 } | |
| 493 | |
| 494 if (instr->mnemonic == S_JSR) { | |
| 495 if (!(Options & B_STK_BALANCE)) { | |
| 496 if (GetMemType (address + size) != MEM_INSTRUCTION) | |
| 497 AddEntry (address + size, scanstart, RTN_SUSP_POT); | |
| 498 | |
| 499 return 0; | |
| 500 } | |
| 501 | |
| 502 continue; | |
| 503 } | |
| 504 | |
| 505 switch (size) { | |
| 506 case 2: | |
| 507 addr = Memory[(ADDR_T)(address + 1)]; | |
| 508 break; | |
| 509 case 3: | |
| 510 addr = Memory[(ADDR_T)(address + 1)] + | |
| 511 (Memory[(ADDR_T)(address + 2)] << 8); | |
| 512 break; | |
| 513 } | |
| 514 | |
| 515 if (types[instr->admode] != impimm && | |
| 516 ((ADDR_T)(addr - StartAddress) < | |
| 517 (ADDR_T)(EndAddress - StartAddress) || | |
| 518 Options & B_LBL_ALWAYS)) | |
| 519 AddEntry (addr, scanstart, WRN_I_LABEL_NEEDED | WRN_B_TEMPORARY); | |
| 520 | |
| 521 if (types[instr->admode] != other && types[instr->admode] != impimm) { | |
| 522 if ((ADDR_T)(addr - StartAddress) < | |
| 523 (ADDR_T)(EndAddress - StartAddress)) { | |
| 524 switch (GetMemType (addr)) { | |
| 525 case MEM_UNPROCESSED: | |
| 526 AddEntry (addr, scanstart, WRN_I_ACCESSED | WRN_B_TEMPORARY); | |
| 527 break; | |
| 528 case MEM_INSTRUCTION: | |
| 529 AddEntry (addr, scanstart, WRN_INSTR_WRITTEN_TO | WRN_B_TEMPORARY); | |
| 530 break; | |
| 531 case MEM_PARAMETER: | |
| 532 AddEntry (addr, scanstart, WRN_PARAM_WRITTEN_TO | WRN_B_TEMPORARY); | |
| 533 break; | |
| 534 } | |
| 535 | |
| 536 if (types[instr->admode] == absindir) { /* indirect mode */ | |
| 537 addr++; /* set flags for upper vector byte */ | |
| 538 | |
| 539 if ((ADDR_T)(addr - StartAddress) < | |
| 540 (ADDR_T)(EndAddress - StartAddress)) | |
| 541 switch (GetMemType (addr)) { | |
| 542 case MEM_UNPROCESSED: | |
| 543 AddEntry (addr, scanstart, WRN_I_ACCESSED | WRN_B_TEMPORARY); | |
| 544 break; | |
| 545 case MEM_INSTRUCTION: | |
| 546 AddEntry (addr, scanstart, | |
| 547 WRN_INSTR_WRITTEN_TO | WRN_B_TEMPORARY); | |
| 548 break; | |
| 549 case MEM_PARAMETER: | |
| 550 AddEntry (addr, scanstart, | |
| 551 WRN_PARAM_WRITTEN_TO | WRN_B_TEMPORARY); | |
| 552 break; | |
| 553 } | |
| 554 } | |
| 555 } | |
| 556 } | |
| 557 } | |
| 558 | |
| 559 /* end of program (unexpectedly) encountered */ | |
| 560 | |
| 561 return 1; | |
| 562 } | |
| 563 | |
|
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564 |
| 0 | 565 int ScanSpecified (void) |
| 566 { | |
| 567 table *entry; | |
| 568 | |
| 569 if (fVerbose) | |
| 570 fprintf (stderr, "%s: scanning the routines at specified address(es)", | |
| 571 prog); | |
| 572 | |
| 573 while ((entry = FindNextEntryType (NULL, ~0, RTN_SURE))) { | |
| 574 PutLabel (entry->address); | |
|
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575 PutReference (entry->address); |
| 0 | 576 PutLowByte (entry->address); |
| 577 PutHighByte (entry->address); | |
| 578 | |
| 579 if (ScanSure (entry->address)) { | |
| 580 fprintf(stderr,"For routine specified at %i:", | |
| 581 (unsigned int)entry->address); | |
| 582 return 1; | |
| 583 } | |
|
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|
584 entry = FindNextEntryType (NULL, ~0, RTN_SURE); // valgrind fart |
| 0 | 585 DeleteEntry (entry); |
| 586 } | |
| 587 | |
| 588 return 0; | |
| 589 } | |
| 590 | |
|
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|
591 |
| 0 | 592 void UnDoScan (ADDR_T scanstart) |
| 593 { | |
| 594 opcodes *instr; | |
| 595 unsigned counter; | |
| 596 ADDR_T address; | |
| 597 | |
| 598 for (address = scanstart; address != EndAddress; address++) { | |
| 599 if (GetMemFlag (address)) return; | |
| 600 | |
| 601 switch (GetMemType (address)) { | |
| 602 case MEM_UNPROCESSED: | |
| 603 return; | |
| 604 | |
| 605 case MEM_INSTRUCTION: | |
| 606 SetMemFlag (address); | |
| 607 SetMemType (address, MEM_DATA); /* This could cause WRN_PARAM_WRITTEN_TO | |
| 608 in vain. */ | |
| 609 instr = &opset[Memory[address++]]; | |
| 610 for (counter = sizes[instr->admode]; --counter; address++) | |
| 611 if (GetMemType (address) == MEM_PARAMETER) | |
| 612 SetMemType (address, MEM_UNPROCESSED); | |
| 613 else if (GetMemType (address) == MEM_INSTRUCTION) | |
| 614 break; | |
| 615 | |
| 616 if (instr->mnemonic == S_STP || instr->mnemonic == S_BRK || | |
| 617 instr->mnemonic == S_RTI || instr->mnemonic == S_RTS || | |
| 618 instr->mnemonic == S_JMP || instr->admode == rel) | |
| 619 return; | |
| 620 | |
| 621 address--; | |
| 622 break; | |
| 623 | |
| 624 case MEM_PARAMETER: | |
| 625 SetMemType (address, MEM_UNPROCESSED); | |
| 626 } | |
| 627 } | |
| 628 } | |
| 629 | |
|
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|
630 |
| 0 | 631 void DeleteSuspectedParents (ADDR_T child) |
| 632 { | |
| 633 table *entry = NULL; | |
| 634 | |
| 635 while ((entry = FindNextEntry (entry, child, ~(RTN_B_PROCESSED | | |
| 636 RTN_B_TEMPORARY), | |
| 637 RTN_SUSPECTED))) { | |
| 638 if (entry->type & RTN_B_PROCESSED && entry->parent != child) | |
| 639 DeleteSuspectedParents (entry->parent); | |
| 640 | |
| 641 DeleteEntry (entry); | |
| 642 } | |
| 643 | |
| 644 entry = NULL; | |
| 645 | |
| 646 while ((entry = FindNextEntryTypeParent (entry, child, ~0, RTN_SUSP_POT))) | |
| 647 DeleteEntry (entry); | |
| 648 | |
| 649 entry = NULL; | |
| 650 | |
| 651 while ((entry = FindNextEntryTypeParent (entry, child, | |
| 652 MASK_ANY | WRN_B_TEMPORARY, | |
| 653 WRN_ANY | WRN_B_TEMPORARY))) { | |
| 654 if (entry->type == (WRN_PARAM_JUMPED_TO | WRN_B_TEMPORARY)) | |
| 655 SetMemType (entry->address, MEM_PARAMETER); | |
| 656 | |
| 657 DeleteEntry (entry); | |
| 658 } | |
| 659 | |
| 660 UnDoScan (child); | |
| 661 } | |
| 662 | |
|
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|
663 |
| 0 | 664 void ScanPotentials (void) |
| 665 { | |
| 666 table *entry; | |
| 667 ADDR_T address; | |
| 668 | |
| 669 if (fVerbose) | |
| 670 fprintf (stderr, "\n%s: scanning potential routines\n", prog); | |
| 671 | |
| 672 while ((entry = FindNextEntryType (NULL, ~0, RTN_POTENTIAL))) { | |
| 673 address = entry->address; | |
| 674 DeleteEntry (entry); | |
| 675 | |
| 676 if (!ScanPotential (address)) { | |
| 677 while ((entry = FindNextEntryType (NULL, ~RTN_B_TEMPORARY, | |
| 678 RTN_SUSPECTED))) { | |
| 679 entry->type |= RTN_B_PROCESSED; | |
| 680 | |
| 681 if (ScanPotential (entry->address) && | |
| 682 (Options & M_DATA_BLOCKS) != O_DBL_IGNORE) { | |
| 683 DeleteSuspectedParents (entry->address); | |
| 684 SetMemType (address, MEM_DATA); | |
| 685 } | |
| 686 } | |
| 687 | |
| 688 if (GetMemType (address) != MEM_DATA) { | |
| 689 PutLabel (address); | |
| 690 PutLowByte (address); | |
| 691 PutHighByte (address); | |
| 692 } | |
| 693 | |
| 694 entry = NULL; | |
| 695 | |
| 696 while ((entry = FindNextEntryType (entry, ~0, RTN_B_TEMPORARY | | |
| 697 RTN_SUSPECTED | RTN_B_PROCESSED))) | |
| 698 DeleteEntry (entry); | |
| 699 | |
| 700 entry = NULL; | |
| 701 | |
| 702 while ((entry = FindNextEntryType (entry, ~0, | |
| 703 RTN_SUSPECTED | RTN_B_PROCESSED))) { | |
| 704 PutLabel (entry->address); | |
|
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705 PutReference (entry->address); |
| 0 | 706 PutLowByte (entry->address); |
| 707 PutHighByte (entry->address); | |
| 708 DeleteEntry (entry); | |
| 709 } | |
| 710 | |
| 711 entry = NULL; | |
| 712 | |
| 713 while ((entry = FindNextEntryType (entry, ~0, RTN_SUSP_POT))) | |
| 714 entry->type = RTN_POTENTIAL; | |
| 715 | |
| 716 entry = NULL; | |
| 717 | |
| 718 while ((entry = FindNextEntryType (entry, MASK_ANY | WRN_B_TEMPORARY, | |
| 719 WRN_ANY | WRN_B_TEMPORARY))) { | |
| 720 switch (entry->type & ~WRN_B_TEMPORARY) { | |
| 721 case WRN_PARAM_WRITTEN_TO: | |
| 722 if (GetMemType (entry->address) == MEM_DATA) | |
| 723 SetMemType (entry->address, MEM_PARAMETER); | |
| 724 entry->type &= ~WRN_B_TEMPORARY; | |
| 725 break; | |
| 726 | |
| 727 case WRN_INSTR_WRITTEN_TO: | |
| 728 if (GetMemType (entry->address) == MEM_DATA) | |
| 729 SetMemType (entry->address, MEM_INSTRUCTION); | |
| 730 entry->type &= ~WRN_B_TEMPORARY; | |
| 731 break; | |
| 732 | |
| 733 case WRN_I_ACCESSED: | |
| 734 SetMemType (entry->address, MEM_DATA); | |
| 735 /* fall through */ | |
| 736 case WRN_I_LABEL_NEEDED: | |
| 737 PutLabel (entry->address); | |
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|
738 PutReference (entry->address); |
| 0 | 739 PutLowByte (entry->address); |
| 740 PutHighByte (entry->address); | |
| 741 DeleteEntry (entry); | |
| 742 break; | |
| 743 | |
| 744 default: | |
| 745 entry->type &= ~WRN_B_TEMPORARY; | |
| 746 } | |
| 747 } | |
| 748 } | |
| 749 else { | |
| 750 DeleteSuspectedParents (address); | |
| 751 SetMemType (address, MEM_DATA); | |
| 752 } | |
| 753 } | |
| 754 } | |
| 755 | |
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parents:
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diff
changeset
|
756 |
| 0 | 757 void ScanTheRest (void) |
| 758 { | |
| 759 ADDR_T address; | |
| 760 table *entry; | |
| 761 unsigned int fPotentials; | |
| 762 | |
| 763 if ((Options & M_DATA_BLOCKS) == O_DBL_NOSCAN) { | |
| 764 for (address = StartAddress; address != EndAddress; address++) | |
| 765 if (GetMemType (address) == MEM_UNPROCESSED) | |
| 766 SetMemType (address, MEM_DATA); | |
| 767 | |
| 768 return; | |
| 769 } | |
| 770 | |
| 771 if (fVerbose) | |
| 772 fprintf (stderr, "%s: scanning the remaining bytes for routines\n", prog); | |
| 773 | |
| 774 for (address = StartAddress; address != EndAddress; address++) { | |
| 775 if (GetMemType (address) || GetMemFlag (address)) | |
| 776 continue; /* scan only unprocessed bytes */ | |
| 777 | |
| 778 if (Options & B_RSC_STRICT) | |
| 779 switch (opset[Memory[address]].mnemonic) { | |
| 780 case S_RTI: | |
| 781 case S_RTS: | |
| 782 case S_BRK: | |
| 783 case S_STP: | |
| 784 continue; | |
| 785 | |
| 786 case S_BRA: | |
| 787 break; | |
| 788 | |
| 789 default: | |
| 790 if (opset[Memory[address]].admode == rel && | |
| 791 GetMemType (address + sizes[rel]) != MEM_INSTRUCTION) | |
| 792 AddEntry (address + sizes[rel], address, | |
| 793 RTN_SUSPECTED | RTN_B_TEMPORARY); | |
| 794 } | |
| 795 | |
| 796 if (fVerbose) | |
|
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diff
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|
797 fprintf (stderr, "\n%s: scanning at $%04x", prog, address); |
| 0 | 798 |
| 799 if (!ScanPotential (address)) { | |
| 800 while ((entry = FindNextEntryType (NULL, ~RTN_B_TEMPORARY, | |
| 801 RTN_SUSPECTED))) { | |
| 802 entry->type |= RTN_B_PROCESSED; | |
| 803 | |
| 804 if (ScanPotential (entry->address) && | |
| 805 (Options & M_DATA_BLOCKS) != O_DBL_IGNORE) { | |
| 806 DeleteSuspectedParents (entry->address); | |
| 807 SetMemType (address, MEM_DATA); | |
| 808 } | |
| 809 } | |
| 810 | |
| 811 if (GetMemType (address) != MEM_DATA) { | |
| 812 PutLabel (address); | |
|
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diff
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|
813 PutReference (address); |
| 0 | 814 PutLowByte (address); |
| 815 PutHighByte (address); | |
| 816 } | |
| 817 | |
| 818 fPotentials = FALSE; | |
| 819 entry = NULL; | |
| 820 | |
| 821 while ((entry = FindNextEntryType (entry, ~0, RTN_SUSP_POT))) { | |
| 822 fPotentials = TRUE; | |
| 823 entry->type = RTN_POTENTIAL; | |
| 824 } | |
| 825 | |
| 826 entry = NULL; | |
| 827 | |
| 828 while ((entry = FindNextEntryType (entry, ~0, RTN_B_TEMPORARY | | |
| 829 RTN_SUSPECTED | RTN_B_PROCESSED))) | |
| 830 DeleteEntry (entry); | |
| 831 | |
| 832 entry = NULL; | |
| 833 | |
| 834 while ((entry = FindNextEntryType (entry, ~0, | |
| 835 RTN_SUSPECTED | RTN_B_PROCESSED))) { | |
| 836 PutLabel (entry->address); | |
|
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diff
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|
837 PutReference (entry->address); |
| 0 | 838 PutLowByte (entry->address); |
| 839 PutHighByte (entry->address); | |
| 840 DeleteEntry (entry); | |
| 841 } | |
| 842 | |
| 843 entry = NULL; | |
| 844 | |
| 845 while ((entry = FindNextEntryType (entry, MASK_ANY | WRN_B_TEMPORARY, | |
| 846 WRN_ANY | WRN_B_TEMPORARY))) { | |
| 847 switch (entry->type & ~WRN_B_TEMPORARY) { | |
| 848 case WRN_PARAM_WRITTEN_TO: | |
| 849 if (GetMemType (entry->address) == MEM_DATA) | |
| 850 SetMemType (entry->address, MEM_PARAMETER); | |
| 851 entry->type &= ~WRN_B_TEMPORARY; | |
| 852 break; | |
| 853 | |
| 854 case WRN_INSTR_WRITTEN_TO: | |
| 855 if (GetMemType (entry->address) == MEM_DATA) | |
| 856 SetMemType (entry->address, MEM_INSTRUCTION); | |
| 857 entry->type &= ~WRN_B_TEMPORARY; | |
| 858 break; | |
| 859 | |
| 860 case WRN_I_ACCESSED: | |
| 861 SetMemType (entry->address, MEM_DATA); | |
| 862 /* fall through */ | |
| 863 case WRN_I_LABEL_NEEDED: | |
| 864 PutLabel (entry->address); | |
|
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parents:
9
diff
changeset
|
865 PutReference (entry->address); |
| 0 | 866 PutLowByte (entry->address); |
| 867 PutHighByte (entry->address); | |
| 868 DeleteEntry (entry); | |
| 869 break; | |
| 870 | |
| 871 default: | |
| 872 entry->type &= ~WRN_B_TEMPORARY; | |
| 873 } | |
| 874 } | |
| 875 | |
| 876 if (fPotentials) ScanPotentials (); | |
| 877 } | |
| 878 else { | |
| 879 DeleteSuspectedParents (address); | |
| 880 SetMemType (address, MEM_DATA); | |
| 881 } | |
| 882 } | |
| 883 | |
| 884 if (fVerbose) | |
| 885 fprintf (stderr, "\n"); | |
| 886 | |
| 887 for (address = StartAddress; address != EndAddress; address++) | |
| 888 if (GetMemType (address) == MEM_UNPROCESSED) { | |
| 889 fPotentials = GetMemFlag (address) ? MEM_PARAMETER : MEM_DATA; | |
| 890 SetMemType (address, fPotentials); | |
| 891 } | |
| 892 } |