Mercurial > hg > Members > kono > os9 > sbc09
annotate a09.c @ 8:96a067cf4c4f
level2 rom done
| author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Thu, 05 Jul 2018 12:07:06 +0900 |
| parents | a6db579d8c11 |
| children | ce7323f9b937 |
| rev | line source |
|---|---|
| 0 | 1 /* A09, 6809 Assembler. |
| 2 | |
| 3 created 1993,1994 by L.C. Benschop. | |
| 4 copyleft (c) 1994-2014 by the sbc09 team, see AUTHORS for more details. | |
| 5 license: GNU General Public License version 2, see LICENSE for more details. | |
| 6 THERE IS NO WARRANTY ON THIS PROGRAM. | |
| 7 | |
| 8 Generates binary image file from the lowest to | |
| 9 the highest address with actually assembled data. | |
| 10 | |
| 5 | 11 Machin edependencies: |
| 0 | 12 char is 8 bits. |
| 13 short is 16 bits. | |
| 14 integer arithmetic is twos complement. | |
| 15 | |
| 16 syntax a09 [-o filename] [-l filename] sourcefile. | |
| 17 | |
| 18 Options | |
| 19 -o filename name of the output file (default name minus a09 suffix) | |
| 20 -s filename name of the s-record output file (default its a binary file) | |
| 21 -l filename list file name (default no listing) | |
| 22 -d enable debugging | |
| 23 | |
| 24 recognized pseudoops: | |
| 25 extern public | |
| 26 macro endm if else endif | |
| 27 org equ set setdp | |
| 28 fcb fcw fdb fcc rmb | |
| 29 end include title | |
| 30 | |
| 31 Not all of these are actually IMPLEMENTED!!!!!! | |
| 32 | |
| 33 Revisions: | |
| 34 1993-11-03 v0.1 | |
| 35 Initial version. | |
| 36 1994/03/21 v0.2 | |
| 37 Fixed PC relative addressing bug | |
| 38 Added SET, SETDP, INCLUDE. IF/ELSE/ENDIF | |
| 39 No macros yet, and no separate linkable modules. | |
| 40 2012-06-04 j at klasek at | |
| 41 New: debugging parameter/option. | |
| 42 Fixed additional possible issue PC relative addressing. | |
| 43 Compatibility: Octal number prefix "&". | |
| 44 2014-07-15 j at klasek at | |
| 45 Fixed usage message. | |
| 46 */ | |
| 47 | |
| 48 #include <stdlib.h> | |
| 49 #include <stdio.h> | |
| 50 #include <string.h> | |
| 51 #include <ctype.h> | |
| 52 | |
| 53 #define NLABELS 2048 | |
| 54 #define MAXIDLEN 16 | |
| 55 #define MAXLISTBYTES 8 | |
| 56 #define FNLEN 30 | |
| 57 #define LINELEN 128 | |
| 58 | |
| 59 static int debug=0; | |
| 60 | |
| 61 struct oprecord{char * name; | |
| 62 unsigned char cat; | |
| 63 unsigned short code;}; | |
| 64 | |
| 65 /* Instruction categories: | |
| 66 0 one byte oprcodes NOP | |
| 67 1 two byte opcodes SWI2 | |
| 68 2 opcodes w. imm byte ANDCC | |
| 69 3 LEAX etc. | |
| 70 4 short branches. BGE | |
| 71 5 long branches 2byte opc LBGE | |
| 72 6 long branches 1byte opc LBRA | |
| 73 7 accumulator instr. ADDA | |
| 74 8 double reg instr 1byte opc LDX | |
| 75 9 double reg instr 2 byte opc LDY | |
| 76 10 single address instrs NEG | |
| 77 11 TFR, EXG | |
| 78 12 push,pull | |
| 79 13 pseudoops | |
| 80 */ | |
| 81 | |
| 82 struct oprecord optable[]={ | |
| 83 {"ABX",0,0x3a},{"ADCA",7,0x89},{"ADCB",7,0xc9}, | |
| 84 {"ADDA",7,0x8b},{"ADDB",7,0xcb},{"ADDD",8,0xc3}, | |
| 85 {"ANDA",7,0X84},{"ANDB",7,0xc4},{"ANDCC",2,0x1c}, | |
| 86 {"ASL",10,0x08},{"ASLA",0,0x48},{"ASLB",0,0x58}, | |
| 87 {"ASR",10,0x07},{"ASRA",0,0x47},{"ASRB",0,0x57}, | |
| 88 {"BCC",4,0x24},{"BCS",4,0x25},{"BEQ",4,0x27}, | |
| 89 {"BGE",4,0x2c},{"BGT",4,0x2e},{"BHI",4,0x22}, | |
| 90 {"BHS",4,0x24},{"BITA",7,0x85},{"BITB",7,0xc5}, | |
| 91 {"BLE",4,0x2f},{"BLO",4,0x25},{"BLS",4,0x23}, | |
| 92 {"BLT",4,0x2d},{"BMI",4,0x2b},{"BNE",4,0x26}, | |
| 93 {"BPL",4,0x2a},{"BRA",4,0x20},{"BRN",4,0x21}, | |
| 94 {"BSR",4,0x8d}, | |
| 95 {"BVC",4,0x28},{"BVS",4,0x29}, | |
| 96 {"CLC",1,0x1cfe},{"CLF",1,0x1cbf},{"CLI",1,0x1cef}, | |
| 97 {"CLIF",1,0x1caf}, | |
| 98 {"CLR",10,0x0f},{"CLRA",0,0x4f},{"CLRB",0,0x5f}, | |
| 99 {"CLV",1,0x1cfd}, | |
| 100 {"CMPA",7,0x81},{"CMPB",7,0xc1},{"CMPD",9,0x1083}, | |
| 101 {"CMPS",9,0x118c},{"CMPU",9,0x1183},{"CMPX",8,0x8c}, | |
| 102 {"CMPY",9,0x108c}, | |
| 103 {"COM",10,0x03},{"COMA",0,0x43},{"COMB",0,0x53}, | |
| 104 {"CWAI",2,0x3c},{"DAA",0,0x19}, | |
| 105 {"DEC",10,0x0a},{"DECA",0,0x4a},{"DECB",0,0x5a}, | |
| 106 {"DES",1,0x327f},{"DEU",1,0x335f},{"DEX",1,0x301f}, | |
| 107 {"DEY",1,0x313f}, | |
| 108 {"ELSE",13,1}, | |
| 109 {"EMOD",13,25}, | |
| 110 {"END",13,2}, | |
| 111 {"ENDC",13,3}, | |
| 112 {"ENDIF",13,3}, | |
| 113 {"ENDM",13,4}, | |
| 114 {"EORA",7,0x88},{"EORB",7,0xc8}, | |
| 115 {"EQU",13,5},{"EXG",11,0x1e},{"EXTERN",13,6}, | |
| 116 {"FCB",13,7},{"FCC",13,8}, | |
| 117 {"FCS",13,23}, | |
| 118 {"FCW",13,9}, | |
| 119 {"FDB",13,9}, | |
| 120 {"IF",13,10}, | |
| 121 {"IFEQ",13,29}, | |
| 122 {"IFGT",13,30}, | |
| 123 {"IFNE",13,28}, | |
| 124 {"IFP1",13,21}, | |
| 125 {"INC",10,0x0c},{"INCA",0,0x4c},{"INCB",0,0x5c}, | |
| 126 {"INCLUDE",13,16}, | |
| 127 {"INS",1,0x3261},{"INU",1,0x3341},{"INX",1,0x3001}, | |
| 128 {"INY",1,0x3121},{"JMP",10,0x0e},{"JSR",8,0x8d}, | |
| 129 {"LBCC",5,0x1024},{"LBCS",5,0x1025},{"LBEQ",5,0x1027}, | |
| 130 {"LBGE",5,0x102c},{"LBGT",5,0x102e},{"LBHI",5,0x1022}, | |
| 131 {"LBHS",5,0x1024}, | |
| 132 {"LBLE",5,0x102f},{"LBLO",5,0x1025},{"LBLS",5,0x1023}, | |
| 133 {"LBLT",5,0x102d},{"LBMI",5,0x102b},{"LBNE",5,0x1026}, | |
| 134 {"LBPL",5,0x102a},{"LBRA",6,0x16},{"LBRN",5,0x1021}, | |
| 135 {"LBSR",6,0x17}, | |
| 136 {"LBVC",5,0x1028},{"LBVS",5,0x1029}, | |
| 137 {"LDA",7,0x86},{"LDB",7,0xc6},{"LDD",8,0xcc}, | |
| 138 {"LDS",9,0x10ce},{"LDU",8,0xce},{"LDX",8,0x8e}, | |
| 139 {"LDY",9,0x108e},{"LEAS",3,0x32}, | |
| 140 {"LEAU",3,0x33},{"LEAX",3,0x30},{"LEAY",3,0x31}, | |
| 141 {"LSL",10,0x08},{"LSLA",0,0x48},{"LSLB",0,0x58}, | |
| 142 {"LSR",10,0x04},{"LSRA",0,0x44},{"LSRB",0,0x54}, | |
| 143 {"MACRO",13,11}, | |
| 144 {"MOD",13,24}, | |
| 145 {"MUL",0,0x3d}, | |
| 146 {"NAM",13,26}, | |
| 147 {"NEG",10,0x00},{"NEGA",0,0x40},{"NEGB",0,0x50}, | |
| 148 {"NOP",0,0x12}, | |
| 149 {"OPT",13,19}, | |
| 150 {"ORA",7,0x8a},{"ORB",7,0xca},{"ORCC",2,0x1a}, | |
| 151 {"ORG",13,12}, | |
| 152 {"OS9",13,32}, | |
| 153 {"PAG",13,20}, {"PAGE",13,20}, | |
| 154 {"PSHS",12,0x34},{"PSHU",12,0x36},{"PUBLIC",13,13}, | |
| 155 {"PULS",12,0x35},{"PULU",12,0x37},{"RMB",13,0}, | |
| 156 {"ROL",10,0x09},{"ROLA",0,0x49},{"ROLB",0,0x59}, | |
| 157 {"ROR",10,0x06},{"RORA",0,0x46},{"RORB",0,0x56}, | |
| 158 {"RTI",0,0x3b},{"RTS",0,0x39}, | |
| 159 {"SBCA",7,0x82},{"SBCB",7,0xc2}, | |
| 160 {"SEC",1,0x1a01},{"SEF",1,0x1a40},{"SEI",1,0x1a10}, | |
| 161 {"SEIF",1,0x1a50},{"SET",13,15}, | |
| 162 {"SETDP",13,14},{"SEV",1,0x1a02},{"SEX",0,0x1d}, | |
| 163 {"STA",7,0x87},{"STB",7,0xc7},{"STD",8,0xcd}, | |
| 164 {"STS",9,0x10cf},{"STU",8,0xcf},{"STX",8,0x8f}, | |
| 165 {"STY",9,0x108f}, | |
| 166 {"SUBA",7,0x80},{"SUBB",7,0xc0},{"SUBD",8,0x83}, | |
| 167 {"SWI",0,0x3f},{"SWI2",1,0x103f},{"SWI3",1,0x113f}, | |
| 168 {"SYNC",0,0x13},{"TFR",11,0x1f}, | |
| 169 {"TITLE",13,18}, | |
| 170 {"TST",10,0x0d},{"TSTA",0,0x4d},{"TSTB",0,0x5d}, | |
| 171 {"TTL",13,18}, | |
| 172 {"USE",13,27}, | |
| 173 }; | |
| 174 | |
| 175 struct symrecord{char name[MAXIDLEN+1]; | |
| 176 char cat; | |
| 177 unsigned short value; | |
| 178 }; | |
| 179 | |
| 180 int symcounter=0; | |
| 3 | 181 int os9 = 0; // os9 flag |
| 6 | 182 int prevloc = 0; |
| 0 | 183 |
| 8 | 184 /* expression categories... |
| 185 ECORD all zeros is ordinary constant. | |
| 186 ECADR bit 1 indicates address within module. | |
| 187 ECEXT bit 2 indicates external address. | |
| 188 ECLBL bit 3 public label | |
| 189 ECABS bit 4 indicates this can't be relocated if it's an address. | |
| 190 ECNEG bit 5 indicates address (if any) is negative. | |
| 191 */ | |
| 192 | |
| 193 | |
| 194 /* Symbol categories. exprcat ( symcat & 0xe ) | |
| 195 0 SCC Constant value (from equ). ECORD | |
| 196 1 SCV Variable value (from set) ECORD | |
| 197 2 SCC__ADR Address within program module (label). ECADR | |
| 198 3 SCV__ADR Variable containing address. ECADR | |
| 199 4 SC_E_ADR Adress in other program module (extern) ECEXT | |
| 200 5 SCVE_ADR Variable containing external address. ECEXT | |
| 201 6 SCU _ADR Unresolved address. ECEXT+ECADR | |
| 202 7 SCV_UADR Variable containing unresolved address. ECEXT+ECADR | |
| 203 8 SC___LBL Public label. ECLBL | |
| 204 9 SCMACRO Macro definition. xxx | |
| 205 10 SCU__LBL Public label (yet undefined). ECADR+ECLBL | |
| 206 11 SCPARAM parameter name. ECADR+ECLBL | |
| 207 12 SCLOCAL local label. ECEXT+ECLBL | |
| 208 13 SCEMPTY empty. xxx | |
| 0 | 209 */ |
| 210 | |
| 211 struct symrecord symtable[NLABELS]; | |
| 212 | |
| 213 void processfile(char *name); | |
| 214 | |
| 215 struct oprecord * findop(char * nm) | |
| 216 /* Find operation (mnemonic) in table using binary search */ | |
| 217 { | |
| 218 int lo,hi,i,s; | |
| 219 lo=0;hi=sizeof(optable)/sizeof(optable[0])-1; | |
| 220 do { | |
| 221 i=(lo+hi)/2; | |
| 222 s=strcmp(optable[i].name,nm); | |
| 223 if(s<0) lo=i+1; | |
| 224 else if(s>0) hi=i-1; | |
| 225 else break; | |
| 226 } while(hi>=lo); | |
| 227 if (s) return NULL; | |
| 228 return optable+i; | |
| 229 } | |
| 230 | |
| 231 struct symrecord * findsym(char * nm) | |
| 232 /* finds symbol table record; inserts if not found | |
| 233 uses binary search, maintains sorted table */ | |
| 234 { | |
| 235 int lo,hi,i,j,s; | |
| 236 lo=0;hi=symcounter-1; | |
| 237 s=1;i=0; | |
| 238 while (hi>=lo) { | |
| 239 i=(lo+hi)/2; | |
| 240 s=strcmp(symtable[i].name,nm); | |
| 241 if(s<0) lo=i+1; | |
| 242 else if(s>0) hi=i-1; | |
| 243 else break; | |
| 244 } | |
| 245 if(s) { | |
| 246 i=(s<0?i+1:i); | |
| 247 if(symcounter==NLABELS) { | |
| 248 fprintf(stderr,"Sorry, no storage for symbols!!!"); | |
| 249 exit(4); | |
| 250 } | |
| 251 for(j=symcounter;j>i;j--) symtable[j]=symtable[j-1]; | |
| 252 symcounter++; | |
| 253 strcpy(symtable[i].name,nm); | |
| 254 symtable[i].cat=13; | |
| 255 } | |
| 256 return symtable+i; | |
| 257 } | |
| 258 | |
| 259 FILE *listfile,*objfile; | |
| 260 char *listname,*objname,*srcname,*curname; | |
| 261 int lineno; | |
| 262 | |
| 263 void | |
| 264 outsymtable() | |
| 265 { | |
| 266 int i,j=0; | |
| 267 fprintf(listfile,"\nSYMBOL TABLE"); | |
| 268 for(i=0;i<symcounter;i++) | |
| 269 if(symtable[i].cat!=13) { | |
| 270 if(j%4==0)fprintf(listfile,"\n"); | |
| 271 fprintf(listfile,"%10s %02d %04x",symtable[i].name,symtable[i].cat, | |
| 272 symtable[i].value); | |
| 273 j++; | |
| 274 } | |
| 275 fprintf(listfile,"\n"); | |
| 276 } | |
| 277 | |
| 278 struct regrecord{char *name;unsigned char tfr,psh;}; | |
| 279 struct regrecord regtable[]= | |
| 280 {{"D",0x00,0x06},{"X",0x01,0x10},{"Y",0x02,0x20}, | |
| 281 {"U",0x03,0x40},{"S",0x04,0x40},{"PC",0x05,0x80}, | |
| 282 {"A",0x08,0x02},{"B",0x09,0x04},{"CC",0x0a,0x01}, | |
| 283 {"CCR",0x0a,0x01},{"DP",0x0b,0x08},{"DPR",0x0b,0x08}}; | |
| 284 | |
| 285 struct regrecord * findreg(char *nm) | |
| 286 { | |
| 287 int i; | |
| 288 for(i=0;i<12;i++) { | |
| 289 if(strcmp(regtable[i].name,nm)==0) return regtable+i; | |
| 290 } | |
| 291 return 0; | |
| 292 } | |
| 293 | |
| 294 | |
| 295 char pass; /* Assembler pass=1 or 2 */ | |
| 296 char listing; /* flag to indicate listing */ | |
| 297 char relocatable; /* flag to indicate relocatable object. */ | |
| 298 char terminate; /* flag to indicate termination. */ | |
| 299 char generating; /* flag to indicate that we generate code */ | |
| 300 unsigned short loccounter,oldlc; /* Location counter */ | |
| 301 | |
| 302 char inpline[128]; /* Current input line (not expanded)*/ | |
| 303 char srcline[128]; /* Current source line */ | |
| 304 char * srcptr; /* Pointer to line being parsed */ | |
| 305 | |
| 306 char unknown; /* flag to indicate value unknown */ | |
| 307 char certain; /* flag to indicate value is certain at pass 1*/ | |
| 308 int error; /* flags indicating errors in current line. */ | |
| 309 int errors; /* number of errors */ | |
| 310 char exprcat; /* category of expression being parsed, eg. | |
| 311 label or constant, this is important when | |
| 312 generating relocatable object code. */ | |
| 313 | |
| 6 | 314 void generate() |
| 315 { | |
| 316 generating = 1; | |
| 317 if (prevloc) { | |
|
7
a6db579d8c11
level 2 rom preparing...
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
parents:
6
diff
changeset
|
318 oldlc = loccounter = prevloc-1 ; |
| 6 | 319 prevloc = 0; |
| 320 } | |
| 321 } | |
| 322 | |
| 0 | 323 |
| 324 char namebuf[MAXIDLEN+1]; | |
| 325 | |
| 326 void | |
| 327 err(int er) { | |
| 328 error |= er ; | |
| 329 } | |
| 330 | |
| 331 void | |
| 332 scanname() | |
| 333 { | |
| 334 int i=0; | |
| 335 char c; | |
| 336 while(1) { | |
| 337 c=*srcptr++; | |
| 338 if(c>='a'&&c<='z')c-=32; | |
| 339 if(c!='.'&&c!='$'&&(c<'0'||c>'9')&&(c<'A'||c>'Z'))break; | |
| 340 if(i<MAXIDLEN)namebuf[i++]=c; | |
| 341 } | |
| 342 namebuf[i]=0; | |
| 343 srcptr--; | |
| 344 } | |
| 345 | |
| 346 void | |
| 347 skipspace() | |
| 348 { | |
| 349 char c; | |
| 350 do { | |
| 351 c=*srcptr++; | |
| 352 } while(c==' '||c=='\t'); | |
| 353 srcptr--; | |
| 354 } | |
| 355 | |
| 356 short scanexpr(int); | |
| 357 | |
| 358 short scandecimal() | |
| 359 { | |
| 360 char c; | |
| 361 short t=0; | |
| 362 c=*srcptr++; | |
| 363 while(isdigit(c)) { | |
| 364 t=t*10+c-'0'; | |
| 365 c=*srcptr++; | |
| 366 } | |
| 367 srcptr--; | |
| 368 return t; | |
| 369 } | |
| 370 | |
| 371 short scanhex() | |
| 372 { | |
| 373 short t=0,i=0; | |
| 374 srcptr++; | |
| 375 scanname(); | |
| 376 while(namebuf[i]>='0'&&namebuf[i]<='F') { | |
| 377 t=t*16+namebuf[i]-'0'; | |
| 378 if(namebuf[i]>'9')t-=7; | |
| 379 i++; | |
| 380 } | |
| 381 if(i==0)error|=1; | |
| 382 return t; | |
| 383 } | |
| 384 | |
| 385 short scanchar() | |
| 386 { | |
| 387 short t; | |
| 388 srcptr++; | |
| 389 t=*srcptr; | |
| 390 if(t)srcptr++; | |
| 391 if (*srcptr=='\'')srcptr++; | |
| 392 return t; | |
| 393 } | |
| 394 | |
| 395 short scanbin() | |
| 396 { | |
| 397 char c; | |
| 398 short t=0; | |
| 399 srcptr++; | |
| 400 c=*srcptr++; | |
| 401 while(c=='0'||c=='1') { | |
| 402 t=t*2+c-'0'; | |
| 403 c=*srcptr++; | |
| 404 } | |
| 405 srcptr--; | |
| 406 return t; | |
| 407 } | |
| 408 | |
| 409 short scanoct() | |
| 410 { | |
| 411 char c; | |
| 412 short t=0; | |
| 413 srcptr++; | |
| 414 c=*srcptr++; | |
| 415 while(c>='0'&&c<='7') { | |
| 416 t=t*8+c-'0'; | |
| 417 c=*srcptr++; | |
| 418 } | |
| 419 srcptr--; | |
| 420 return t; | |
| 421 } | |
| 422 | |
| 423 | |
| 424 short scanlabel() | |
| 425 { | |
| 426 struct symrecord * p; | |
| 427 scanname(); | |
| 428 p=findsym(namebuf); | |
| 429 if(p->cat==13) { | |
| 430 p->cat=6; | |
| 431 p->value=0; | |
| 432 } | |
| 433 if(p->cat==9||p->cat==11)error|=1; | |
| 434 exprcat=p->cat&14; | |
| 435 if(exprcat==6||exprcat==10)unknown=1; | |
| 436 if(((exprcat==2||exprcat==8) | |
| 437 && (unsigned short)(p->value)>(unsigned short)loccounter)|| | |
| 438 exprcat==4) | |
| 439 certain=0; | |
| 440 if(exprcat==8||exprcat==6||exprcat==10)exprcat=2; | |
| 441 return p->value; | |
| 442 } | |
| 443 | |
| 444 | |
| 445 short scanfactor() | |
| 446 { | |
| 447 char c; | |
| 448 short t; | |
| 449 skipspace(); | |
| 450 c=*srcptr; | |
| 451 if(isalpha(c))return scanlabel(); | |
| 452 else if(isdigit(c))return scandecimal(); | |
| 453 else switch(c) { | |
| 454 case '.' : | |
| 455 case '*' : srcptr++;exprcat|=2;return loccounter; | |
| 456 case '$' : return scanhex(); | |
| 457 case '%' : return scanbin(); | |
| 458 case '&' : /* compatibility */ | |
| 459 case '@' : return scanoct(); | |
| 460 case '\'' : return scanchar(); | |
| 461 case '(' : srcptr++;t=scanexpr(0);skipspace(); | |
| 462 if(*srcptr==')')srcptr++;else error|=1; | |
| 463 return t; | |
| 464 case '-' : srcptr++;exprcat^=32;return -scanfactor(); | |
| 465 case '+' : srcptr++;return scanfactor(); | |
| 466 case '!' : srcptr++;exprcat|=16;return !scanfactor(); | |
| 467 case '^' : | |
| 468 case '~' : srcptr++;exprcat|=16;return ~scanfactor(); | |
| 469 } | |
| 470 error|=1; | |
| 471 return 0; | |
| 472 } | |
| 473 | |
| 474 #define EXITEVAL {srcptr--;return t;} | |
| 475 | |
| 476 #define RESOLVECAT if((oldcat&15)==0)oldcat=0;\ | |
| 477 if((exprcat&15)==0)exprcat=0;\ | |
| 478 if((exprcat==2&&oldcat==34)||(exprcat==34&&oldcat==2)) {\ | |
| 479 exprcat=0;\ | |
| 480 oldcat=0;}\ | |
| 481 exprcat|=oldcat;\ | |
| 482 /* resolve such cases as constant added to address or difference between | |
| 483 two addresses in same module */ | |
| 484 | |
| 485 | |
| 486 short scanexpr(int level) /* This is what you call _recursive_ descent!!!*/ | |
| 487 { | |
| 488 short t,u; | |
| 489 char oldcat,c; | |
| 490 exprcat=0; | |
| 491 if(level==10)return scanfactor(); | |
| 492 t=scanexpr(level+1); | |
| 493 while(1) { | |
| 5 | 494 // skipspace(); |
| 0 | 495 c=*srcptr++; |
| 496 switch(c) { | |
| 497 case '*':oldcat=exprcat; | |
| 498 t*=scanexpr(10); | |
| 499 exprcat|=oldcat|16; | |
| 500 break; | |
| 501 case '/':oldcat=exprcat; | |
| 502 u=scanexpr(10); | |
| 503 if(u)t/=u;else error|=1; | |
| 504 exprcat|=oldcat|16; | |
| 505 break; | |
| 506 case '%':oldcat=exprcat; | |
| 507 u=scanexpr(10); | |
| 508 if(u)t%=u;else error|=1; | |
| 509 exprcat|=oldcat|16; | |
| 510 break; | |
| 511 case '+':if(level==9)EXITEVAL | |
| 512 oldcat=exprcat; | |
| 513 t+=scanexpr(9); | |
| 514 RESOLVECAT | |
| 515 break; | |
| 516 case '-':if(level==9)EXITEVAL | |
| 517 oldcat=exprcat; | |
| 518 t-=scanexpr(9); | |
| 519 exprcat^=32; | |
| 520 RESOLVECAT | |
| 521 break; | |
| 522 case '<':if(*(srcptr)=='<') { | |
| 523 if(level>=8)EXITEVAL | |
| 524 srcptr++; | |
| 525 oldcat=exprcat; | |
| 526 t<<=scanexpr(8); | |
| 527 exprcat|=oldcat|16; | |
| 528 break; | |
| 529 } else if(*(srcptr)=='=') { | |
| 530 if(level>=7)EXITEVAL | |
| 531 srcptr++; | |
| 532 oldcat=exprcat; | |
| 533 t=t<=scanexpr(7); | |
| 534 exprcat|=oldcat|16; | |
| 535 break; | |
| 536 } else { | |
| 537 if(level>=7)EXITEVAL | |
| 538 oldcat=exprcat; | |
| 539 t=t<scanexpr(7); | |
| 540 exprcat|=oldcat|16; | |
| 541 break; | |
| 542 } | |
| 543 case '>':if(*(srcptr)=='>') { | |
| 544 if(level>=8)EXITEVAL | |
| 545 srcptr++; | |
| 546 oldcat=exprcat; | |
| 547 t>>=scanexpr(8); | |
| 548 exprcat|=oldcat|16; | |
| 549 break; | |
| 550 } else if(*(srcptr)=='=') { | |
| 551 if(level>=7)EXITEVAL | |
| 552 srcptr++; | |
| 553 oldcat=exprcat; | |
| 554 t=t>=scanexpr(7); | |
| 555 exprcat|=oldcat|16; | |
| 556 break; | |
| 557 } else { | |
| 558 if(level>=7)EXITEVAL | |
| 559 oldcat=exprcat; | |
| 560 t=t>scanexpr(7); | |
| 561 exprcat|=oldcat|16; | |
| 562 break; | |
| 563 } | |
| 5 | 564 case '!':if(level>=6) { |
| 565 if (*srcptr=='=') { | |
| 566 srcptr++; | |
| 567 oldcat=exprcat; | |
| 568 t=t!=scanexpr(6); | |
| 569 exprcat|=oldcat|16; | |
| 570 } else { | |
| 571 oldcat=exprcat; | |
| 572 t|=scanexpr(6); | |
| 573 exprcat|=oldcat|16; | |
| 574 } | |
| 575 } | |
| 0 | 576 break; |
| 577 case '=':if(level>=6)EXITEVAL | |
| 578 if(*srcptr=='=')srcptr++; | |
| 579 oldcat=exprcat; | |
| 580 t=t==scanexpr(6); | |
| 581 exprcat|=oldcat|16; | |
| 582 break; | |
| 583 case '&':if(level>=5)EXITEVAL | |
| 584 oldcat=exprcat; | |
| 585 t&=scanexpr(5); | |
| 586 exprcat|=oldcat|16; | |
| 587 break; | |
| 588 case '^':if(level>=4)EXITEVAL | |
| 589 oldcat=exprcat; | |
| 590 t^=scanexpr(4); | |
| 591 exprcat|=oldcat|16; | |
| 592 break; | |
| 593 case '|':if(level>=3)EXITEVAL | |
| 594 oldcat=exprcat; | |
| 595 t|=scanexpr(3); | |
| 596 exprcat|=oldcat|16; | |
| 597 default: EXITEVAL | |
| 598 } | |
| 599 } | |
| 600 } | |
| 601 | |
| 602 char mode; /* addressing mode 0=immediate,1=direct,2=extended,3=postbyte | |
| 603 4=pcrelative(with postbyte) 5=indirect 6=pcrel&indirect*/ | |
| 604 char opsize; /*desired operand size 0=dunno,1=5,2=8,3=16*/ | |
| 605 short operand; | |
| 606 unsigned char postbyte; | |
| 607 | |
| 608 int dpsetting; | |
| 609 | |
| 610 | |
| 611 int scanindexreg() | |
| 612 { | |
| 613 char c; | |
| 614 c=*srcptr; | |
| 615 if(islower(c))c-=32; | |
| 616 if (debug) fprintf(stderr,"DEBUG: scanindexreg: indexreg=%d, mode=%d, opsize=%d, error=%d, postbyte=%02X\n",c,mode,opsize,error,postbyte); | |
| 617 switch(c) { | |
| 618 case 'X':return 1; | |
| 619 case 'Y':postbyte|=0x20;return 1; | |
| 620 case 'U':postbyte|=0x40;return 1; | |
| 621 case 'S':postbyte|=0x60;return 1; | |
| 622 default: return 0; | |
| 623 } | |
| 624 } | |
| 625 | |
| 626 void | |
| 627 set3() | |
| 628 { | |
| 629 if(mode<3)mode=3; | |
| 630 } | |
| 631 | |
| 632 void | |
| 633 scanspecial() | |
| 634 { | |
| 635 set3(); | |
| 636 skipspace(); | |
| 637 if(*srcptr=='-') { | |
| 638 srcptr++; | |
| 639 if(*srcptr=='-') { | |
| 640 srcptr++; | |
| 641 postbyte=0x83; | |
| 642 } else postbyte=0x82; | |
| 643 if(!scanindexreg())error|=2;else srcptr++; | |
| 644 } else { | |
| 645 postbyte=0x80; | |
| 646 if(!scanindexreg())error|=2;else srcptr++; | |
| 647 if(*srcptr=='+') { | |
| 648 srcptr++; | |
| 649 if(*srcptr=='+') { | |
| 650 srcptr++; | |
| 651 postbyte+=1; | |
| 652 } | |
| 653 } else postbyte+=4; | |
| 654 } | |
| 655 } | |
| 656 | |
| 657 void | |
| 658 scanindexed() | |
| 659 { | |
| 660 set3(); | |
| 661 postbyte=0; | |
| 662 if(scanindexreg()) { | |
| 663 srcptr++; | |
| 664 if(opsize==0) { | |
| 665 if(unknown||!certain)opsize=3; | |
| 666 else if(operand>=-16&&operand<16&&mode==3)opsize=1; | |
| 667 else if(operand>=-128&&operand<128)opsize=2; | |
| 668 else opsize=3; | |
| 669 } | |
| 670 switch(opsize) { | |
| 671 case 1:postbyte+=(operand&31);opsize=0;break; | |
| 672 case 2:postbyte+=0x88;break; | |
| 673 case 3:postbyte+=0x89;break; | |
| 674 } | |
| 675 } else { /*pc relative*/ | |
| 676 if(toupper(*srcptr)!='P')error|=2; | |
| 677 else { | |
| 678 srcptr++; | |
| 679 if(toupper(*srcptr)!='C')error|=2; | |
| 680 else { | |
| 681 srcptr++; | |
| 682 if(toupper(*srcptr)=='R')srcptr++; | |
| 683 } | |
| 684 } | |
| 685 mode++;postbyte+=0x8c; | |
| 686 if(opsize==1)opsize=2; | |
| 687 } | |
| 688 } | |
| 689 | |
| 690 #define RESTORE {srcptr=oldsrcptr;c=*srcptr;goto dodefault;} | |
| 691 | |
| 692 void | |
| 693 scanoperands() | |
| 694 { | |
| 695 char c,d,*oldsrcptr; | |
| 696 unknown=0; | |
| 697 opsize=0; | |
| 698 certain=1; | |
| 699 skipspace(); | |
| 700 c=*srcptr; | |
| 701 mode=0; | |
| 702 if(c=='[') { | |
| 703 srcptr++; | |
| 704 c=*srcptr; | |
| 705 mode=5; | |
| 706 } | |
| 707 if (debug) fprintf(stderr,"DEBUG: scanoperands: c=%c (%02X)\n",c,c); | |
| 708 switch(c) { | |
| 709 case 'D': case 'd': | |
| 710 oldsrcptr=srcptr; | |
| 711 srcptr++; | |
| 712 skipspace(); | |
| 713 if(*srcptr!=',')RESTORE else { | |
| 714 postbyte=0x8b; | |
| 715 srcptr++; | |
| 716 if(!scanindexreg())RESTORE else {srcptr++;set3();} | |
| 717 } | |
| 718 break; | |
| 719 case 'A': case 'a': | |
| 720 oldsrcptr=srcptr; | |
| 721 srcptr++; | |
| 722 skipspace(); | |
| 723 if(*srcptr!=',')RESTORE else { | |
| 724 postbyte=0x86; | |
| 725 srcptr++; | |
| 726 if(!scanindexreg())RESTORE else {srcptr++;set3();} | |
| 727 } | |
| 728 break; | |
| 729 case 'B': case 'b': | |
| 730 oldsrcptr=srcptr; | |
| 731 srcptr++; | |
| 732 skipspace(); | |
| 733 if(*srcptr!=',')RESTORE else { | |
| 734 postbyte=0x85; | |
| 735 srcptr++; | |
| 736 if (debug) fprintf(stderr,"DEBUG: scanoperands: breg preindex: c=%c (%02X)\n",*srcptr,*srcptr); | |
| 737 if(!scanindexreg())RESTORE else {srcptr++;set3();} | |
| 738 if (debug) fprintf(stderr,"DEBUG: scanoperands: breg: postindex c=%c (%02X)\n",*srcptr,*srcptr); | |
| 739 } | |
| 740 break; | |
| 741 case ',': | |
| 742 srcptr++; | |
| 743 scanspecial(); | |
| 744 break; | |
| 745 case '#': | |
| 746 if(mode==5)error|=2;else mode=0; | |
| 747 srcptr++; | |
| 5 | 748 if (*srcptr=='"') { |
| 749 operand = (srcptr[1]<<8) + srcptr[2] ; | |
| 750 srcptr += 3; | |
| 751 break; | |
| 752 } | |
| 0 | 753 operand=scanexpr(0); |
| 754 break; | |
| 755 case '<': | |
| 756 srcptr++; | |
| 757 if(*srcptr=='<') { | |
| 758 srcptr++; | |
| 759 opsize=1; | |
| 760 } else opsize=2; | |
| 761 goto dodefault; | |
| 762 case '>': | |
| 763 srcptr++; | |
| 764 opsize=3; | |
| 765 default: dodefault: | |
| 766 operand=scanexpr(0); | |
| 767 skipspace(); | |
| 768 if(*srcptr==',') { | |
| 769 srcptr++; | |
| 770 scanindexed(); | |
| 771 } else { | |
| 772 if(opsize==0) { | |
| 773 if(unknown||!certain||dpsetting==-1|| | |
| 774 (unsigned short)(operand-dpsetting*256)>=256) | |
| 775 opsize=3; else opsize=2; | |
| 776 } | |
| 777 if(opsize==1)opsize=2; | |
| 778 if(mode==5){ | |
| 779 postbyte=0x8f; | |
| 780 opsize=3; | |
| 781 } else mode=opsize-1; | |
| 782 } | |
| 783 } | |
| 784 if (debug) fprintf(stderr,"DEBUG: scanoperands: mode=%d, error=%d, postbyte=%02X\n",mode,error,postbyte); | |
| 785 if(mode>=5) { | |
| 786 skipspace(); | |
| 787 postbyte|=0x10; | |
| 788 if(*srcptr!=']')error|=2;else srcptr++; | |
| 789 } | |
| 790 if(pass==2&&unknown)error|=4; | |
| 791 } | |
| 792 | |
| 793 unsigned char codebuf[128]; | |
| 794 int codeptr; /* byte offset within instruction */ | |
| 795 int suppress; /* 0=no suppress 1=until ENDIF 2=until ELSE 3=until ENDM */ | |
| 796 int ifcount; /* count of nested IFs within suppressed text */ | |
| 797 | |
| 798 unsigned char outmode; /* 0 is binary, 1 is s-records */ | |
| 799 | |
| 800 unsigned short hexaddr; | |
| 801 int hexcount; | |
| 802 unsigned char hexbuffer[16]; | |
| 803 unsigned int chksum; | |
| 804 | |
| 805 extern int os9crc(unsigned char c, int crcp); | |
| 806 int crc; | |
| 807 | |
| 808 void | |
| 809 reset_crc() | |
| 810 { | |
| 811 crc = -1; | |
| 812 } | |
| 813 | |
| 814 | |
| 815 void | |
| 816 flushhex() | |
| 817 { | |
| 818 int i; | |
| 819 if(hexcount){ | |
| 820 fprintf(objfile,"S1%02X%04X",(hexcount+3)&0xff,hexaddr&0xffff); | |
| 821 for(i=0;i<hexcount;i++)fprintf(objfile,"%02X",hexbuffer[i]); | |
| 822 chksum+=(hexaddr&0xff)+((hexaddr>>8)&0xff)+hexcount+3; | |
| 823 fprintf(objfile,"%02X\n",0xff-(chksum&0xff)); | |
| 824 hexaddr+=hexcount; | |
| 825 hexcount=0; | |
| 826 chksum=0; | |
| 827 } | |
| 828 } | |
| 829 | |
| 830 void | |
| 831 outhex(unsigned char x) | |
| 832 { | |
| 833 if(hexcount==16)flushhex(); | |
| 834 hexbuffer[hexcount++]=x; | |
| 835 chksum+=x; | |
| 836 } | |
| 837 | |
| 838 void | |
| 839 outbuffer() | |
| 840 { | |
| 841 int i; | |
| 842 for(i=0;i<codeptr;i++) { | |
| 843 crc = os9crc(codebuf[i],crc); | |
| 844 if(!outmode)fputc(codebuf[i],objfile);else outhex(codebuf[i]); | |
| 845 } | |
| 846 } | |
| 847 | |
| 848 char *errormsg[]={"Error in expression", | |
| 849 "Illegal addressing mode", | |
| 850 "Undefined label", | |
| 851 "Multiple definitions of label", | |
| 852 "Relative branch out of range", | |
| 853 "Missing label", | |
| 854 "","","","","","","","","", | |
| 855 "Illegal mnemonic" | |
| 856 }; | |
| 857 | |
| 858 void | |
| 859 report() | |
| 860 { | |
| 861 int i; | |
| 862 fprintf(stderr,"File %s, line %d:%s\n",curname,lineno,srcline); | |
| 863 for(i=0;i<16;i++) { | |
| 864 if(error&1) { | |
| 865 fprintf(stderr,"%s\n",errormsg[i]); | |
| 866 if(pass==2&&listing)fprintf(listfile,"**** %s\n",errormsg[i]); | |
| 867 } | |
| 868 error>>=1; | |
| 869 } | |
| 5 | 870 error = 0; |
| 0 | 871 errors++; |
| 872 } | |
| 873 | |
| 874 void | |
| 875 outlist() | |
| 876 { | |
| 877 int i; | |
| 878 fprintf(listfile,"%04X: ",oldlc); | |
| 879 for(i=0;i<codeptr&&i<MAXLISTBYTES;i++) | |
| 880 fprintf(listfile,"%02X",codebuf[i]); | |
| 881 for(;i<=MAXLISTBYTES;i++) | |
| 882 fprintf(listfile," "); | |
| 883 fprintf(listfile,"%s\n",srcline); | |
| 884 while(i<codeptr) { | |
| 885 fprintf(listfile,"%04X: ",oldlc + i); | |
| 886 for(int j=0;i<codeptr&&j<MAXLISTBYTES;j++) { | |
| 887 fprintf(listfile,"%02X",codebuf[i]); i++; | |
| 888 } | |
| 889 fprintf(listfile,"\n"); | |
| 890 } | |
| 891 } | |
| 892 | |
| 893 void | |
| 894 setlabel(struct symrecord * lp) | |
| 895 { | |
| 896 if(lp) { | |
| 897 if(lp->cat!=13&&lp->cat!=6) { | |
| 898 if(lp->cat!=2||lp->value!=loccounter) | |
| 899 error|=8; | |
| 900 } else { | |
| 901 lp->cat=2; | |
| 902 lp->value=loccounter; | |
| 903 } | |
| 904 } | |
| 905 } | |
| 906 | |
| 907 void | |
| 908 putbyte(unsigned char b) | |
| 909 { | |
| 910 codebuf[codeptr++]=b; | |
| 911 } | |
| 912 | |
| 913 void | |
| 914 putword(unsigned short w) | |
| 915 { | |
| 916 codebuf[codeptr++]=w>>8; | |
| 917 codebuf[codeptr++]=w&0x0ff; | |
| 918 } | |
| 919 | |
| 920 void | |
| 921 doaddress() /* assemble the right addressing bytes for an instruction */ | |
| 922 { | |
| 923 int offs; | |
| 924 switch(mode) { | |
| 925 case 0: if(opsize==2)putbyte(operand);else putword(operand);break; | |
| 926 case 1: putbyte(operand);break; | |
| 927 case 2: putword(operand);break; | |
| 928 case 3: case 5: putbyte(postbyte); | |
| 929 switch(opsize) { | |
| 930 case 2: putbyte(operand);break; | |
| 931 case 3: putword(operand); | |
| 932 } | |
| 933 break; | |
| 934 case 4: case 6: offs=(unsigned short)operand-loccounter-codeptr-2; | |
| 935 if(offs<-128||offs>=128||opsize==3||unknown||!certain) { | |
| 936 if((!unknown)&&opsize==2&&(offs<-128||offs>=128) ) | |
| 937 error|=16; | |
| 8 | 938 // offs--; |
| 939 // opsize=3; | |
| 940 // postbyte++; | |
| 0 | 941 } |
| 942 putbyte(postbyte); | |
| 943 if (debug) fprintf(stderr,"DEBUG: doaddress: mode=%d, opsize=%d, error=%d, postbyte=%02X, operand=%04X offs=%d\n",mode,opsize,error,postbyte,operand,offs); | |
| 944 if(opsize==3)putword(offs); | |
| 945 else putbyte(offs); | |
| 946 } | |
| 947 } | |
| 948 | |
| 949 void | |
| 950 onebyte(int co) | |
| 951 { | |
| 952 putbyte(co); | |
| 953 } | |
| 954 | |
| 955 void | |
| 956 twobyte(int co) | |
| 957 { | |
| 958 putword(co); | |
| 959 } | |
| 960 | |
| 961 void | |
| 962 oneimm(int co) | |
| 963 { | |
| 964 scanoperands(); | |
| 5 | 965 if(mode>=3) |
| 966 error|=2; | |
| 0 | 967 putbyte(co); |
| 968 putbyte(operand); | |
| 969 } | |
| 970 | |
| 971 void | |
| 972 lea(int co) | |
| 973 { | |
| 974 putbyte(co); | |
| 975 scanoperands(); | |
| 976 if(mode==0) error|=2; | |
| 977 if(mode<3) { | |
| 978 opsize=3; | |
| 979 postbyte=0x8f; | |
| 980 mode=3; | |
| 981 } | |
| 982 if (debug) fprintf(stderr,"DEBUG: lea: mode=%d, opsize=%d, error=%d, postbyte=%02X, *src=%c\n",mode,opsize,error,postbyte,*srcptr); | |
| 983 doaddress(); | |
| 984 } | |
| 985 | |
| 986 void | |
| 987 sbranch(int co) | |
| 988 { | |
| 989 int offs; | |
| 990 scanoperands(); | |
| 991 if(mode!=1&&mode!=2)error|=2; | |
| 992 offs=(unsigned short)operand-loccounter-2; | |
| 993 if(!unknown&&(offs<-128||offs>=128))error|=16; | |
| 994 if(pass==2&&unknown)error|=4; | |
| 995 putbyte(co); | |
| 996 putbyte(offs); | |
| 997 } | |
| 998 | |
| 999 void | |
| 1000 lbra(int co) | |
| 1001 { | |
| 1002 scanoperands(); | |
| 1003 if(mode!=1&&mode!=2)error|=2; | |
| 1004 putbyte(co); | |
| 1005 putword(operand-loccounter-3); | |
| 1006 } | |
| 1007 | |
| 1008 void | |
| 1009 lbranch(int co) | |
| 1010 { | |
| 1011 scanoperands(); | |
| 1012 if(mode!=1&&mode!=2)error|=2; | |
| 1013 putword(co); | |
| 1014 putword(operand-loccounter-4); | |
| 1015 } | |
| 1016 | |
| 1017 void | |
| 1018 arith(int co) | |
| 1019 { | |
| 1020 scanoperands(); | |
| 1021 switch(mode) { | |
| 1022 case 0:opsize=2;putbyte(co);break; | |
| 1023 case 1:putbyte(co+0x010);break; | |
| 1024 case 2:putbyte(co+0x030);break; | |
| 1025 default:putbyte(co+0x020); | |
| 1026 } | |
| 1027 doaddress(); | |
| 1028 } | |
| 1029 | |
| 1030 void | |
| 1031 darith(int co) | |
| 1032 { | |
| 1033 scanoperands(); | |
| 1034 switch(mode) { | |
| 1035 case 0:opsize=3;putbyte(co);break; | |
| 1036 case 1:putbyte(co+0x010);break; | |
| 1037 case 2:putbyte(co+0x030);break; | |
| 1038 default:putbyte(co+0x020); | |
| 1039 } | |
| 1040 doaddress(); | |
| 1041 } | |
| 1042 | |
| 1043 void | |
| 1044 d2arith(int co) | |
| 1045 { | |
| 1046 scanoperands(); | |
| 1047 switch(mode) { | |
| 1048 case 0:opsize=3;putword(co);break; | |
| 1049 case 1:putword(co+0x010);break; | |
| 1050 case 2:putword(co+0x030);break; | |
| 1051 default:putword(co+0x020); | |
| 1052 } | |
| 1053 doaddress(); | |
| 1054 } | |
| 1055 | |
| 1056 void | |
| 1057 oneaddr(int co) | |
| 1058 { | |
| 1059 scanoperands(); | |
| 1060 switch(mode) { | |
| 1061 case 0: error|=2;break; | |
| 1062 case 1: putbyte(co);break; | |
| 1063 case 2: putbyte(co+0x70);break; | |
| 1064 default: putbyte(co+0x60);break; | |
| 1065 } | |
| 1066 doaddress(); | |
| 1067 } | |
| 1068 | |
| 1069 void | |
| 1070 tfrexg(int co) | |
| 1071 { | |
| 1072 struct regrecord * p; | |
| 1073 putbyte(co); | |
| 1074 skipspace(); | |
| 1075 scanname(); | |
| 1076 if((p=findreg(namebuf))==0)error|=2; | |
| 1077 else postbyte=(p->tfr)<<4; | |
| 1078 skipspace(); | |
| 1079 if(*srcptr==',')srcptr++;else error|=2; | |
| 1080 skipspace(); | |
| 1081 scanname(); | |
| 1082 if((p=findreg(namebuf))==0)error|=2; | |
| 1083 else postbyte|=p->tfr; | |
| 1084 putbyte(postbyte); | |
| 1085 } | |
| 1086 | |
| 1087 void | |
| 1088 pshpul(int co) | |
| 1089 { | |
| 1090 struct regrecord *p; | |
| 1091 putbyte(co); | |
| 1092 postbyte=0; | |
| 1093 do { | |
| 1094 if(*srcptr==',')srcptr++; | |
| 1095 skipspace(); | |
| 1096 scanname(); | |
| 1097 if((p=findreg(namebuf))==0)error|=2; | |
| 1098 else postbyte|=p->psh; | |
| 1099 skipspace(); | |
| 1100 }while (*srcptr==','); | |
| 1101 putbyte(postbyte); | |
| 1102 } | |
| 1103 | |
| 1104 void | |
| 1105 skipComma() | |
| 1106 { | |
| 1107 while(*srcptr && *srcptr!='\n' && *srcptr!=',')srcptr++; | |
| 1108 if (*srcptr==',') { | |
| 1109 srcptr++; | |
| 1110 } else { | |
| 1111 error|=1; | |
| 1112 } | |
| 1113 } | |
| 1114 | |
| 1115 int modStart; | |
| 1116 | |
| 1117 void os9begin() | |
| 1118 { | |
| 6 | 1119 generate(); |
| 3 | 1120 os9=1; // contiguous code generation ( i.e. ignore org nor rmb ) |
| 0 | 1121 modStart = loccounter; |
| 1122 reset_crc(); | |
| 1123 putword(0x87cd); | |
| 1124 putword(scanexpr(0)-loccounter); // module size | |
| 1125 skipComma(); | |
| 1126 putword(scanexpr(0)-loccounter); // offset to module name | |
| 1127 skipComma(); | |
| 1128 putbyte(scanexpr(0)); // type / language | |
| 1129 skipComma(); | |
| 1130 putbyte(scanexpr(0)); // attribute | |
| 1131 int parity=0; | |
| 1132 for(int i=0; i< 8; i++) parity^=codebuf[i]; | |
| 1133 putbyte(parity^0xff); // header parity | |
| 1134 skipspace(); | |
| 1135 while (*srcptr==',') { // there are some more | |
| 1136 srcptr++; | |
| 1137 putword(scanexpr(0)); | |
| 1138 skipspace(); | |
| 1139 } | |
| 1140 } | |
| 1141 | |
| 1142 void os9end() | |
| 1143 { | |
| 1144 crc = crc ^ 0xffffff; | |
| 1145 | |
| 1146 putbyte((crc>>16)&0xff); | |
| 1147 putbyte((crc>>8)&0xff); | |
| 1148 putbyte(crc&0xff); | |
| 1149 } | |
| 1150 | |
| 1151 | |
| 1152 void | |
| 1153 pseudoop(int co,struct symrecord * lp) | |
| 1154 { | |
| 1155 int i; | |
| 1156 char c; | |
| 1157 char *fname; | |
| 1158 int locsave; | |
| 1159 | |
| 1160 switch(co) { | |
| 1161 case 0:/* RMB */ | |
| 3 | 1162 // in OS9 mode, this generates no data |
| 1163 // loccounter will be reset after any code to the current code generation | |
| 6 | 1164 if (os9 && !prevloc) prevloc = loccounter+1; |
| 0 | 1165 setlabel(lp); |
| 1166 operand=scanexpr(0); | |
| 1167 if(unknown)error|=4; | |
| 1168 loccounter+=operand; | |
| 1169 if(generating&&pass==2) { | |
| 6 | 1170 if(!outmode && !os9 ) { |
| 1171 for(i=0;i<operand;i++) { fputc(0,objfile); } | |
| 1172 } else | |
| 1173 flushhex(); | |
| 0 | 1174 } |
| 1175 hexaddr=loccounter; | |
| 1176 break; | |
| 1177 case 5:/* EQU */ | |
| 1178 operand=scanexpr(0); | |
| 1179 if(!lp)error|=32; | |
| 1180 else { | |
| 1181 if(lp->cat==13||lp->cat==6|| | |
| 1182 (lp->value==(unsigned short)operand&&pass==2)) { | |
| 1183 if(exprcat==2)lp->cat=2; | |
| 1184 else lp->cat=0; | |
| 1185 lp->value=operand; | |
| 1186 } else error|=8; | |
| 1187 } | |
| 1188 break; | |
| 1189 case 7:/* FCB */ | |
| 6 | 1190 generate(); |
| 0 | 1191 setlabel(lp); |
| 1192 do { | |
| 1193 if(*srcptr==',')srcptr++; | |
| 1194 skipspace(); | |
| 1195 if(*srcptr=='\"') { | |
| 1196 srcptr++; | |
| 1197 while(*srcptr!='\"'&&*srcptr) | |
| 1198 putbyte(*srcptr++); | |
| 1199 if(*srcptr=='\"')srcptr++; | |
| 1200 } else { | |
| 1201 putbyte(scanexpr(0)); | |
| 1202 if(unknown&&pass==2)error|=4; | |
| 1203 } | |
| 1204 skipspace(); | |
| 1205 } while(*srcptr==','); | |
| 1206 break; | |
| 1207 case 8:/* FCC */ | |
| 6 | 1208 generate(); |
| 0 | 1209 setlabel(lp); |
| 1210 skipspace(); | |
| 1211 c=*srcptr++; | |
| 1212 while(*srcptr!=c&&*srcptr) | |
| 1213 putbyte(*srcptr++); | |
| 1214 if(*srcptr==c)srcptr++; | |
| 1215 break; | |
| 1216 case 9:/* FDB */ | |
| 6 | 1217 generate(); |
| 0 | 1218 setlabel(lp); |
| 1219 do { | |
| 1220 if(*srcptr==',')srcptr++; | |
| 1221 skipspace(); | |
| 1222 putword(scanexpr(0)); | |
| 1223 if(unknown&&pass==2)error|=4; | |
| 1224 skipspace(); | |
| 1225 } while(*srcptr==','); | |
| 1226 break; | |
| 1227 case 23 :/* FCS */ | |
| 6 | 1228 generate(); |
| 0 | 1229 setlabel(lp); |
| 1230 skipspace(); | |
| 1231 int sep = *srcptr; | |
| 1232 if(sep=='\"' || sep=='/') { | |
| 1233 srcptr++; | |
| 1234 while(*srcptr!=sep&&*srcptr) | |
| 1235 putbyte(*srcptr++); | |
| 1236 if(*srcptr==sep)srcptr++; | |
| 1237 codebuf[codeptr-1] |= 0x80; // os9 string termination | |
| 1238 } | |
| 1239 break; | |
| 1240 case 1: /* ELSE */ | |
| 1241 suppress=1; | |
| 1242 break; | |
| 1243 case 21: /* IFP1 */ | |
| 1244 if(pass==2)suppress=2; | |
| 1245 break; | |
| 1246 case 29: /* IFGT */ | |
| 1247 operand=scanexpr(0); | |
| 1248 if(unknown)error|=4; | |
| 1249 if(operand>0)suppress=2; | |
| 1250 break; | |
| 1251 case 31: /* IFLT */ | |
| 1252 operand=scanexpr(0); | |
| 1253 if(unknown)error|=4; | |
| 1254 if(operand<0)suppress=2; | |
| 1255 break; | |
| 3 | 1256 case 30: /* IFEQ */ |
| 0 | 1257 operand=scanexpr(0); |
| 1258 if(unknown)error|=4; | |
| 1259 if(operand==0)suppress=2; | |
| 1260 break; | |
| 3 | 1261 case 28: /* IFNE */ |
| 0 | 1262 case 10: /* IF */ |
| 1263 operand=scanexpr(0); | |
| 1264 if(unknown)error|=4; | |
| 1265 if(!operand)suppress=2; | |
| 1266 break; | |
| 1267 case 12: /* ORG */ | |
| 6 | 1268 if (os9 && !prevloc) prevloc = loccounter+1; |
| 0 | 1269 operand=scanexpr(0); |
| 1270 if(unknown)error|=4; | |
| 3 | 1271 if(generating&&pass==2&&!outmode&&!os9) { |
| 0 | 1272 for(i=0;i<(unsigned short)operand-loccounter;i++) |
| 3 | 1273 fputc(0,objfile); |
| 1274 } else flushhex(); | |
| 0 | 1275 loccounter=operand; |
| 1276 hexaddr=loccounter; | |
| 1277 break; | |
| 1278 case 14: /* SETDP */ | |
| 1279 operand=scanexpr(0); | |
| 1280 if(unknown)error|=4; | |
| 1281 if(!(operand&255))operand=(unsigned short)operand>>8; | |
| 1282 if((unsigned)operand>255)operand=-1; | |
| 1283 dpsetting=operand; | |
| 1284 break; | |
| 1285 case 15: /* SET */ | |
| 1286 operand=scanexpr(0); | |
| 1287 if(!lp)error|=32; | |
| 1288 else { | |
| 1289 if(lp->cat&1||lp->cat==6) { | |
| 1290 if(exprcat==2)lp->cat=3; | |
| 1291 else lp->cat=1; | |
| 1292 lp->value=operand; | |
| 1293 } else error|=8; | |
| 1294 } | |
| 1295 break; | |
| 1296 case 2: /* END */ | |
| 1297 terminate=1; | |
| 1298 break; | |
| 1299 case 27: /* USE */ | |
| 6 | 1300 // locsave = loccounter ; |
| 0 | 1301 case 16: /* INCLUDE */ |
| 1302 skipspace(); | |
| 1303 if(*srcptr=='"')srcptr++; | |
| 1304 i = 0; | |
| 1305 for(i=0; !(srcptr[i]==0||srcptr[i]=='"'); i++); | |
| 1306 int len = i; | |
| 1307 fname = calloc(1,len); | |
| 1308 for(i=0;i<len;i++) { | |
| 1309 if(*srcptr==0||*srcptr=='"')break; | |
| 1310 fname[i]=*srcptr++; | |
| 1311 } | |
| 1312 fname[i]=0; | |
| 1313 processfile(fname); | |
| 1314 codeptr=0; | |
| 1315 srcline[0]=0; | |
| 3 | 1316 // if (co==27) loccounter = locsave; |
| 0 | 1317 break; |
| 1318 case 24: /* MOD */ | |
| 6 | 1319 oldlc = loccounter = 0; |
| 0 | 1320 setlabel(lp); |
| 1321 os9begin(); | |
| 1322 break; | |
| 1323 case 25: /* EMOD */ | |
| 1324 os9end(); | |
| 1325 break; | |
| 1326 case 32: /* OS9 */ | |
| 6 | 1327 generate(); |
| 0 | 1328 setlabel(lp); |
| 3 | 1329 putword(0x103f); // SWI2 |
| 0 | 1330 putbyte(scanexpr(0)); |
| 1331 break; | |
| 1332 case 18: /* TTL */ | |
| 1333 break; | |
| 1334 case 19: /* OPT */ | |
| 1335 case 26: /* NAM */ | |
| 1336 case 20: /* PAG */ | |
| 1337 case 3: /* ENDIF/ENDC */ | |
| 1338 break; | |
| 1339 } | |
| 1340 } | |
| 1341 | |
| 1342 | |
| 1343 void | |
| 1344 processline() | |
| 1345 { | |
| 1346 struct symrecord * lp; | |
| 1347 struct oprecord * op; | |
| 1348 int co; | |
| 1349 char c; | |
| 1350 srcptr=srcline; | |
| 1351 oldlc=loccounter; | |
| 5 | 1352 // error=0; |
| 0 | 1353 unknown=0;certain=1; |
| 1354 lp=0; | |
| 1355 codeptr=0; | |
| 1356 if(isalnum(*srcptr)) { | |
| 1357 scanname();lp=findsym(namebuf); | |
| 1358 if(*srcptr==':') srcptr++; | |
| 1359 } | |
| 1360 skipspace(); | |
| 1361 if(isalnum(*srcptr)) { | |
| 1362 scanname(); | |
| 1363 op=findop(namebuf); | |
| 1364 if(op) { | |
| 1365 if(op->cat!=13){ | |
| 6 | 1366 generate(); |
| 0 | 1367 setlabel(lp); |
| 1368 } | |
| 1369 co=op->code; | |
| 1370 switch(op->cat) { | |
| 1371 case 0:onebyte(co);break; | |
| 1372 case 1:twobyte(co);break; | |
| 1373 case 2:oneimm(co);break; | |
| 1374 case 3:lea(co);break; | |
| 1375 case 4:sbranch(co);break; | |
| 1376 case 5:lbranch(co);break; | |
| 1377 case 6:lbra(co);break; | |
| 1378 case 7:arith(co);break; | |
| 1379 case 8:darith(co);break; | |
| 1380 case 9:d2arith(co);break; | |
| 1381 case 10:oneaddr(co);break; | |
| 1382 case 11:tfrexg(co);break; | |
| 1383 case 12:pshpul(co);break; | |
| 1384 case 13:pseudoop(co,lp); | |
| 1385 } | |
| 1386 c=*srcptr; | |
| 1387 if (debug) fprintf(stderr,"DEBUG: processline: mode=%d, opsize=%d, error=%d, postbyte=%02X c=%c\n",mode,opsize,error,postbyte,c); | |
| 1388 if(c!=' '&&*(srcptr-1)!=' '&&c!=0&&c!=';')error|=2; | |
| 1389 } | |
| 1390 else error|=0x8000; | |
| 1391 }else setlabel(lp); | |
| 1392 if(pass==2) { | |
| 1393 outbuffer(); | |
| 1394 if(listing)outlist(); | |
| 1395 } | |
| 1396 if(error)report(); | |
| 1397 loccounter+=codeptr; | |
| 1398 } | |
| 1399 | |
| 1400 void | |
| 1401 suppressline() | |
| 1402 { | |
| 1403 struct oprecord * op; | |
| 1404 srcptr=srcline; | |
| 1405 oldlc=loccounter; | |
| 1406 codeptr=0; | |
| 1407 if(isalnum(*srcptr)) { | |
| 1408 scanname(); | |
| 1409 if(*srcptr==':')srcptr++; | |
| 1410 } | |
| 1411 skipspace(); | |
| 1412 scanname();op=findop(namebuf); | |
| 1413 if(op && op->cat==13) { | |
| 1414 if(op->code==10||op->code==13||op->code==29||op->code==28||op->code==21||op->code==30) ifcount++; | |
| 1415 else if(op->code==3) { | |
| 1416 if(ifcount>0)ifcount--;else if(suppress==1|suppress==2)suppress=0; | |
| 1417 } else if(op->code==1) { | |
| 1418 if(ifcount==0 && suppress==2)suppress=0; | |
| 1419 } | |
| 1420 } | |
| 6 | 1421 if(pass==2&&listing)outlist(); } |
| 0 | 1422 |
| 1423 void | |
| 1424 usage(char*nm) | |
| 1425 { | |
| 1426 fprintf(stderr,"Usage: %s [-o objname] [-l listname] [-s srecord-file] srcname\n",nm); | |
| 1427 exit(2); | |
| 1428 } | |
| 1429 | |
| 1430 char * | |
| 1431 strconcat(char *s,int spos,char *d) | |
| 1432 { | |
| 1433 int slen = strlen(s); | |
| 1434 int dlen = strlen(d); | |
| 1435 if ( spos == 0) spos = slen; | |
| 1436 char *out = calloc(1,spos+dlen+1); | |
| 1437 int i = 0; | |
| 1438 for(; i< spos; i++ ) out[i] = s[i]; | |
| 1439 for(; i< spos+dlen+1; i++ ) out[i] = *d++; | |
| 1440 return out; | |
| 1441 } | |
| 1442 | |
| 1443 | |
| 1444 void | |
| 1445 getoptions(int c,char*v[]) | |
| 1446 { | |
| 6 | 1447 int i=1; |
| 0 | 1448 if(c==1)usage(v[0]); |
| 6 | 1449 while(v[i]) { |
| 1450 if(strcmp(v[i],"-d")==0) { | |
| 1451 debug=1; | |
| 1452 i++; | |
| 1453 } else if(strcmp(v[i],"-o")==0) { | |
| 1454 objname = v[i+1]; | |
| 1455 i+=2; | |
| 1456 } else if(strcmp(v[i],"-s")==0) { | |
| 1457 objname=v[i+1]; | |
| 1458 outmode=1; | |
| 1459 i+=2; | |
| 1460 } else if(strcmp(v[i],"-l")==0) { | |
| 1461 listname=v[i+1]; | |
| 1462 i+=2; | |
| 1463 } else if(*v[i]=='-') { | |
| 1464 usage(v[0]); | |
| 1465 } else { | |
| 1466 if (srcname) usage(v[0]); | |
| 1467 srcname=v[i]; | |
| 1468 i++; | |
| 1469 } | |
| 0 | 1470 } |
| 1471 if(objname==0) { | |
| 1472 for(i=0;srcname[i]!='.' && srcname[i]!=0 ;i++) ; | |
| 1473 objname = strconcat(srcname,i,".b"); | |
| 1474 } | |
| 1475 listing=(listname!=0); | |
| 1476 } | |
| 1477 | |
| 1478 void | |
| 1479 expandline() | |
| 1480 { | |
| 1481 int i=0,j=0,k,j1; | |
| 1482 for(i=0;i<128&&j<128;i++) | |
| 1483 { | |
| 1484 if(inpline[i]=='\n') { | |
| 1485 srcline[j]=0;break; | |
| 1486 } | |
| 1487 if(inpline[i]=='\t') { | |
| 1488 j1=j; | |
| 1489 for(k=0;k<8-j1%8 && j<128;k++)srcline[j++]=' '; | |
| 1490 }else srcline[j++]=inpline[i]; | |
| 1491 } | |
| 1492 srcline[127]=0; | |
| 1493 } | |
| 1494 | |
| 1495 | |
| 1496 void | |
| 1497 processfile(char *name) | |
| 1498 { | |
| 1499 char *oldname; | |
| 1500 int oldno; | |
| 1501 FILE *srcfile; | |
| 1502 oldname=curname; | |
| 1503 curname=name; | |
| 1504 oldno=lineno; | |
| 1505 lineno=0; | |
| 1506 if((srcfile=fopen(name,"r"))==0) { | |
| 6 | 1507 int i = 0; |
| 1508 if (oldname) { | |
| 1509 i = strlen(oldname); | |
| 1510 while(i>0 && oldname[i]!='/') i--; | |
| 1511 } | |
| 0 | 1512 if (i>0) { |
| 1513 char *next = strconcat(oldname,i+1,name); | |
| 1514 if((srcfile=fopen(next,"r"))==0) { | |
| 1515 fprintf(stderr,"Cannot open source file %s\n",next); | |
| 1516 exit(4); | |
| 1517 } | |
| 1518 curname = next; | |
| 1519 } else { | |
| 1520 fprintf(stderr,"Cannot open source file %s\n",name); | |
| 1521 exit(4); | |
| 1522 } | |
| 1523 } | |
| 1524 while(!terminate&&fgets(inpline,128,srcfile)) { | |
| 1525 expandline(); | |
| 1526 lineno++; | |
| 1527 srcptr=srcline; | |
| 1528 if(suppress)suppressline(); else processline(); | |
| 1529 } | |
| 1530 fclose(srcfile); | |
| 1531 if(suppress) { | |
| 1532 fprintf(stderr,"improperly nested IF statements in %s",curname); | |
| 1533 errors++; | |
| 1534 suppress=0; | |
| 1535 } | |
| 1536 lineno=oldno; | |
| 1537 curname=oldname; | |
| 1538 } | |
| 1539 | |
| 1540 int | |
| 1541 main(int argc,char *argv[]) | |
| 1542 { | |
| 1543 char c; | |
| 1544 getoptions(argc,argv); | |
| 1545 pass=1; | |
| 1546 errors=0; | |
| 1547 generating=0; | |
| 1548 terminate=0; | |
| 1549 processfile(srcname); | |
| 1550 if(errors) { | |
| 1551 fprintf(stderr,"%d Pass 1 Errors, Continue?",errors); | |
| 1552 c=getchar(); | |
| 1553 if(c=='n'||c=='N') exit(3); | |
| 1554 } | |
| 1555 pass=2; | |
| 6 | 1556 prevloc = 0; |
| 0 | 1557 loccounter=0; |
| 1558 errors=0; | |
| 1559 generating=0; | |
| 1560 terminate=0; | |
| 1561 if(listing&&((listfile=fopen(listname,"w"))==0)) { | |
| 1562 fprintf(stderr,"Cannot open list file"); | |
| 1563 exit(4); | |
| 1564 } | |
| 1565 if((objfile=fopen(objname,outmode?"w":"wb"))==0) { | |
| 1566 fprintf(stderr,"Cannot write object file\n"); | |
| 1567 exit(4); | |
| 1568 } | |
| 1569 processfile(srcname); | |
| 1570 fprintf(stderr,"%d Pass 2 errors.\n",errors); | |
| 1571 if(listing) { | |
| 1572 fprintf(listfile,"%d Pass 2 errors.\n",errors); | |
| 1573 outsymtable(); | |
| 1574 fclose(listfile); | |
| 1575 } | |
| 1576 if(outmode){ | |
| 1577 flushhex(); | |
| 1578 fprintf(objfile,"S9030000FC\n"); | |
| 1579 } | |
| 1580 fclose(objfile); | |
| 1581 return 0; | |
| 1582 } | |
| 1583 |