1 /* $NetBSD: aicasm.c,v 1.14 2023/09/01 11:23:39 andvar Exp $ */ 2 3 /* 4 * Aic7xxx SCSI host adapter firmware assembler 5 * 6 * Copyright (c) 1997, 1998, 2000, 2001 Justin T. Gibbs. 7 * Copyright (c) 2001, 2002 Adaptec Inc. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions, and the following disclaimer, 15 * without modification. 16 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 17 * substantially similar to the "NO WARRANTY" disclaimer below 18 * ("Disclaimer") and any redistribution must be conditioned upon 19 * including a substantially similar Disclaimer requirement for further 20 * binary redistribution. 21 * 3. Neither the names of the above-listed copyright holders nor the names 22 * of any contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * Alternatively, this software may be distributed under the terms of the 26 * GNU General Public License ("GPL") version 2 as published by the Free 27 * Software Foundation. 28 * 29 * NO WARRANTY 30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 31 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 32 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 33 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 34 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 38 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 39 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 40 * POSSIBILITY OF SUCH DAMAGES. 41 * 42 * $FreeBSD: src/sys/dev/aic7xxx/aicasm/aicasm.c,v 1.35 2002/08/31 06:39:40 gibbs Exp $ 43 */ 44 45 #include <sys/cdefs.h> 46 __RCSID("$NetBSD: aicasm.c,v 1.14 2023/09/01 11:23:39 andvar Exp $"); 47 48 #include <sys/types.h> 49 #include <sys/mman.h> 50 51 #include <ctype.h> 52 #include <inttypes.h> 53 #include <regex.h> 54 #include <stdio.h> 55 #include <stdlib.h> 56 #include <string.h> 57 #include <sysexits.h> 58 #include <unistd.h> 59 60 #if linux 61 #include <endian.h> 62 #else 63 #include <machine/endian.h> 64 #endif 65 66 #include "aicasm.h" 67 #include "aicasm_symbol.h" 68 #include "aicasm_insformat.h" 69 70 typedef struct patch { 71 STAILQ_ENTRY(patch) links; 72 int patch_func; 73 u_int begin; 74 u_int skip_instr; 75 u_int skip_patch; 76 } patch_t; 77 78 STAILQ_HEAD(patch_list, patch) patches; 79 80 static void usage(void); 81 static void back_patch(void); 82 static void output_code(void); 83 static void output_listing(char *ifilename); 84 static void dump_scope(scope_t *scope); 85 static void emit_patch(scope_t *scope, int patch); 86 static int check_patch(patch_t **start_patch, int start_instr, 87 int *skip_addr, int *func_vals); 88 89 struct path_list search_path; 90 int includes_search_curdir; 91 char *appname; 92 char *stock_include_file; 93 FILE *ofile; 94 char *ofilename; 95 char *regfilename; 96 FILE *regfile; 97 char *listfilename; 98 FILE *listfile; 99 char *regdiagfilename; 100 FILE *regdiagfile; 101 int src_mode; 102 int dst_mode; 103 104 static STAILQ_HEAD(,instruction) seq_program; 105 struct cs_tailq cs_tailq; 106 struct scope_list scope_stack; 107 symlist_t patch_functions; 108 109 #if DEBUG 110 extern int yy_flex_debug; 111 extern int mm_flex_debug; 112 extern int yydebug; 113 extern int mmdebug; 114 #endif 115 extern FILE *yyin; 116 extern int yyparse(void); 117 118 int main(int argc, char *argv[]); 119 120 int 121 main(int argc, char *argv[]) 122 { 123 extern char *optarg; 124 extern int optind; 125 int ch; 126 int retval; 127 char *inputfilename; 128 scope_t *sentinal; 129 130 STAILQ_INIT(&patches); 131 SLIST_INIT(&search_path); 132 STAILQ_INIT(&seq_program); 133 TAILQ_INIT(&cs_tailq); 134 SLIST_INIT(&scope_stack); 135 136 /* Set Sentinal scope node */ 137 sentinal = scope_alloc(); 138 sentinal->type = SCOPE_ROOT; 139 140 includes_search_curdir = 1; 141 appname = *argv; 142 regfile = NULL; 143 listfile = NULL; 144 #if DEBUG 145 yy_flex_debug = 0; 146 mm_flex_debug = 0; 147 yydebug = 0; 148 mmdebug = 0; 149 #endif 150 while ((ch = getopt(argc, argv, "d:i:l:n:o:p:r:I:")) != -1) { 151 switch(ch) { 152 case 'd': 153 #if DEBUG 154 if (strcmp(optarg, "s") == 0) { 155 yy_flex_debug = 1; 156 mm_flex_debug = 1; 157 } else if (strcmp(optarg, "p") == 0) { 158 yydebug = 1; 159 mmdebug = 1; 160 } else { 161 fprintf(stderr, "%s: -d Requires either an " 162 "'s' or 'p' argument\n", appname); 163 usage(); 164 } 165 #else 166 stop("-d: Assembler not built with debugging " 167 "information", EX_SOFTWARE); 168 #endif 169 break; 170 case 'i': 171 stock_include_file = optarg; 172 break; 173 case 'l': 174 /* Create a program listing */ 175 if ((listfile = fopen(optarg, "w")) == NULL) { 176 perror(optarg); 177 stop(NULL, EX_CANTCREAT); 178 } 179 listfilename = optarg; 180 break; 181 case 'n': 182 /* Don't complain about the -nostdinc directive */ 183 if (strcmp(optarg, "ostdinc")) { 184 fprintf(stderr, "%s: Unknown option -%c%s\n", 185 appname, ch, optarg); 186 usage(); 187 /* NOTREACHED */ 188 } 189 break; 190 case 'o': 191 if ((ofile = fopen(optarg, "w")) == NULL) { 192 perror(optarg); 193 stop(NULL, EX_CANTCREAT); 194 } 195 ofilename = optarg; 196 break; 197 case 'p': 198 /* Create Register Diagnostic "printing" Functions */ 199 if ((regdiagfile = fopen(optarg, "w")) == NULL) { 200 perror(optarg); 201 stop(NULL, EX_CANTCREAT); 202 } 203 regdiagfilename = optarg; 204 break; 205 case 'r': 206 if ((regfile = fopen(optarg, "w")) == NULL) { 207 perror(optarg); 208 stop(NULL, EX_CANTCREAT); 209 } 210 regfilename = optarg; 211 break; 212 case 'I': 213 { 214 path_entry_t include_dir; 215 216 if (strcmp(optarg, "-") == 0) { 217 if (includes_search_curdir == 0) { 218 fprintf(stderr, "%s: Warning - '-I-' " 219 "specified multiple " 220 "times\n", appname); 221 } 222 includes_search_curdir = 0; 223 for (include_dir = SLIST_FIRST(&search_path); 224 include_dir != NULL; 225 include_dir = SLIST_NEXT(include_dir, 226 links)) 227 /* 228 * All entries before a '-I-' only 229 * apply to includes specified with 230 * quotes instead of "<>". 231 */ 232 include_dir->quoted_includes_only = 1; 233 } else { 234 include_dir = 235 (path_entry_t)malloc(sizeof(*include_dir)); 236 if (include_dir == NULL) { 237 perror(optarg); 238 stop(NULL, EX_OSERR); 239 } 240 include_dir->directory = strdup(optarg); 241 if (include_dir->directory == NULL) { 242 perror(optarg); 243 stop(NULL, EX_OSERR); 244 } 245 include_dir->quoted_includes_only = 0; 246 SLIST_INSERT_HEAD(&search_path, include_dir, 247 links); 248 } 249 break; 250 } 251 case '?': 252 default: 253 usage(); 254 /* NOTREACHED */ 255 } 256 } 257 argc -= optind; 258 argv += optind; 259 260 if (argc != 1) { 261 fprintf(stderr, "%s: No input file specified\n", appname); 262 usage(); 263 /* NOTREACHED */ 264 } 265 266 if (regdiagfile != NULL 267 && (regfile == NULL || stock_include_file == NULL)) { 268 fprintf(stderr, 269 "%s: The -p option requires the -r and -i options.\n", 270 appname); 271 usage(); 272 /* NOTREACHED */ 273 } 274 symtable_open(); 275 inputfilename = *argv; 276 include_file(*argv, SOURCE_FILE); 277 retval = yyparse(); 278 if (retval == 0) { 279 if (SLIST_FIRST(&scope_stack) == NULL 280 || SLIST_FIRST(&scope_stack)->type != SCOPE_ROOT) { 281 stop("Unterminated conditional expression", EX_DATAERR); 282 /* NOTREACHED */ 283 } 284 285 /* Process outmost scope */ 286 process_scope(SLIST_FIRST(&scope_stack)); 287 /* 288 * Descend the tree of scopes and insert/emit 289 * patches as appropriate. We perform a depth first 290 * transversal, recursively handling each scope. 291 */ 292 /* start at the root scope */ 293 dump_scope(SLIST_FIRST(&scope_stack)); 294 295 /* Patch up forward jump addresses */ 296 back_patch(); 297 298 if (ofile != NULL) 299 output_code(); 300 if (regfile != NULL) 301 symtable_dump(regfile, regdiagfile); 302 if (listfile != NULL) 303 output_listing(inputfilename); 304 } 305 306 stop(NULL, 0); 307 /* NOTREACHED */ 308 return (0); 309 } 310 311 static void 312 usage(void) 313 { 314 315 (void)fprintf(stderr, 316 "usage: %-16s [-nostdinc] [-I-] [-I directory] [-o output_file]\n" 317 " [-r register_output_file [-p register_diag_file -i includefile]]\n" 318 " [-l program_list_file]\n" 319 " input_file\n", appname); 320 exit(EX_USAGE); 321 } 322 323 static void 324 back_patch(void) 325 { 326 struct instruction *cur_instr; 327 328 for (cur_instr = STAILQ_FIRST(&seq_program); 329 cur_instr != NULL; 330 cur_instr = STAILQ_NEXT(cur_instr, links)) { 331 if (cur_instr->patch_label != NULL) { 332 struct ins_format3 *f3_instr; 333 u_int address; 334 335 if (cur_instr->patch_label->type != LABEL) { 336 char buf[255]; 337 338 snprintf(buf, sizeof(buf), 339 "Undefined label %s", 340 cur_instr->patch_label->name); 341 stop(buf, EX_DATAERR); 342 /* NOTREACHED */ 343 } 344 f3_instr = &cur_instr->format.format3; 345 address = f3_instr->address; 346 address += cur_instr->patch_label->info.linfo->address; 347 f3_instr->address = address; 348 } 349 } 350 } 351 352 static void 353 output_code(void) 354 { 355 struct instruction *cur_instr; 356 patch_t *cur_patch; 357 critical_section_t *cs; 358 symbol_node_t *cur_node; 359 int instrcount; 360 361 instrcount = 0; 362 fprintf(ofile, 363 "/*\n" 364 " * DO NOT EDIT - This file is automatically generated\n" 365 " * from the following source files:\n" 366 " *\n" 367 "%s */\n", versions); 368 369 fprintf(ofile, "static const uint8_t seqprog[] = {\n"); 370 for (cur_instr = STAILQ_FIRST(&seq_program); 371 cur_instr != NULL; 372 cur_instr = STAILQ_NEXT(cur_instr, links)) { 373 374 fprintf(ofile, "%s\t0x%02x, 0x%02x, 0x%02x, 0x%02x", 375 cur_instr == STAILQ_FIRST(&seq_program) ? "" : ",\n", 376 #if BYTE_ORDER == LITTLE_ENDIAN 377 cur_instr->format.bytes[0], 378 cur_instr->format.bytes[1], 379 cur_instr->format.bytes[2], 380 cur_instr->format.bytes[3]); 381 #else 382 cur_instr->format.bytes[3], 383 cur_instr->format.bytes[2], 384 cur_instr->format.bytes[1], 385 cur_instr->format.bytes[0]); 386 #endif 387 instrcount++; 388 } 389 fprintf(ofile, "\n};\n\n"); 390 391 if (patch_arg_list == NULL) 392 stop("Patch argument list not defined", 393 EX_DATAERR); 394 395 /* 396 * Output patch information. Patch functions first. 397 */ 398 fprintf(ofile, 399 "typedef int %spatch_func_t (%s);\n", prefix, patch_arg_list); 400 401 for (cur_node = SLIST_FIRST(&patch_functions); 402 cur_node != NULL; 403 cur_node = SLIST_NEXT(cur_node,links)) { 404 fprintf(ofile, 405 "static %spatch_func_t %spatch%d_func;\n" 406 "\n" 407 "static int\n" 408 "%spatch%d_func(%s)\n" 409 "{\n" 410 " return (%s);\n" 411 "}\n\n", 412 prefix, 413 prefix, 414 cur_node->symbol->info.condinfo->func_num, 415 prefix, 416 cur_node->symbol->info.condinfo->func_num, 417 patch_arg_list, 418 cur_node->symbol->name); 419 } 420 421 fprintf(ofile, 422 "static const struct patch {\n" 423 " %spatch_func_t *patch_func;\n" 424 " uint32_t begin :10,\n" 425 " skip_instr :10,\n" 426 " skip_patch :12;\n" 427 "} patches[] = {\n", prefix); 428 429 for (cur_patch = STAILQ_FIRST(&patches); 430 cur_patch != NULL; 431 cur_patch = STAILQ_NEXT(cur_patch,links)) { 432 fprintf(ofile, "%s\t{ %spatch%d_func, %d, %d, %d }", 433 cur_patch == STAILQ_FIRST(&patches) ? "" : ",\n", 434 prefix, 435 cur_patch->patch_func, cur_patch->begin, 436 cur_patch->skip_instr, cur_patch->skip_patch); 437 } 438 439 fprintf(ofile, "\n};\n\n"); 440 441 fprintf(ofile, 442 "static const struct cs {\n" 443 " uint16_t begin;\n" 444 " uint16_t end;\n" 445 "} critical_sections[] = {\n"); 446 447 for (cs = TAILQ_FIRST(&cs_tailq); 448 cs != NULL; 449 cs = TAILQ_NEXT(cs, links)) { 450 fprintf(ofile, "%s\t{ %d, %d }", 451 cs == TAILQ_FIRST(&cs_tailq) ? "" : ",\n", 452 cs->begin_addr, cs->end_addr); 453 } 454 455 fprintf(ofile, "\n};\n\n"); 456 457 fprintf(ofile, 458 "#define NUM_CRITICAL_SECTIONS \\\n" 459 " (sizeof(critical_sections) / sizeof(*critical_sections))\n"); 460 fprintf(ofile, 461 "static const int num_critical_sections = NUM_CRITICAL_SECTIONS;\n"); 462 463 fprintf(stderr, "%s: %d instructions used\n", appname, instrcount); 464 } 465 466 static void 467 dump_scope(scope_t *scope) 468 { 469 scope_t *cur_scope; 470 471 /* 472 * Emit the first patch for this scope 473 */ 474 emit_patch(scope, 0); 475 476 /* 477 * Dump each scope within this one. 478 */ 479 cur_scope = TAILQ_FIRST(&scope->inner_scope); 480 481 while (cur_scope != NULL) { 482 483 dump_scope(cur_scope); 484 485 cur_scope = TAILQ_NEXT(cur_scope, scope_links); 486 } 487 488 /* 489 * Emit the second, closing, patch for this scope 490 */ 491 emit_patch(scope, 1); 492 } 493 494 void 495 emit_patch(scope_t *scope, int patch) 496 { 497 patch_info_t *pinfo; 498 patch_t *new_patch; 499 500 pinfo = &scope->patches[patch]; 501 502 if (pinfo->skip_instr == 0) 503 /* No-Op patch */ 504 return; 505 506 new_patch = (patch_t *)malloc(sizeof(*new_patch)); 507 508 if (new_patch == NULL) 509 stop("Could not malloc patch structure", EX_OSERR); 510 511 memset(new_patch, 0, sizeof(*new_patch)); 512 513 if (patch == 0) { 514 new_patch->patch_func = scope->func_num; 515 new_patch->begin = scope->begin_addr; 516 } else { 517 new_patch->patch_func = 0; 518 new_patch->begin = scope->end_addr; 519 } 520 new_patch->skip_instr = pinfo->skip_instr; 521 new_patch->skip_patch = pinfo->skip_patch; 522 STAILQ_INSERT_TAIL(&patches, new_patch, links); 523 } 524 525 void 526 output_listing(char *ifilename) 527 { 528 char buf[1024]; 529 FILE *ifile; 530 struct instruction *cur_instr; 531 patch_t *cur_patch; 532 symbol_node_t *cur_func; 533 int *func_values; 534 int instrcount; 535 int instrptr; 536 int line; 537 int func_count; 538 int skip_addr; 539 540 instrcount = 0; 541 instrptr = 0; 542 line = 1; 543 skip_addr = 0; 544 if ((ifile = fopen(ifilename, "r")) == NULL) { 545 perror(ifilename); 546 stop(NULL, EX_DATAERR); 547 } 548 549 /* 550 * Determine which options to apply to this listing. 551 */ 552 for (func_count = 0, cur_func = SLIST_FIRST(&patch_functions); 553 cur_func != NULL; 554 cur_func = SLIST_NEXT(cur_func, links)) 555 func_count++; 556 557 func_values = NULL; 558 if (func_count != 0) { 559 func_values = (int *)malloc(func_count * sizeof(int)); 560 561 if (func_values == NULL) 562 stop("Could not malloc", EX_OSERR); 563 564 func_values[0] = 0; /* FALSE func */ 565 func_count--; 566 567 /* 568 * Ask the user to fill in the return values for 569 * the rest of the functions. 570 */ 571 572 573 for (cur_func = SLIST_FIRST(&patch_functions); 574 cur_func != NULL && SLIST_NEXT(cur_func, links) != NULL; 575 cur_func = SLIST_NEXT(cur_func, links), func_count--) { 576 int input; 577 578 fprintf(stdout, "\n(%s)\n", cur_func->symbol->name); 579 fprintf(stdout, 580 "Enter the return value for " 581 "this expression[T/F]:"); 582 583 while (1) { 584 585 input = getchar(); 586 input = toupper(input); 587 588 if (input == 'T') { 589 func_values[func_count] = 1; 590 break; 591 } else if (input == 'F') { 592 func_values[func_count] = 0; 593 break; 594 } 595 } 596 if (isatty(fileno(stdin)) == 0) 597 putchar(input); 598 } 599 free(func_values); 600 func_values = NULL; 601 fprintf(stdout, "\nThanks!\n"); 602 } 603 604 /* Now output the listing */ 605 cur_patch = STAILQ_FIRST(&patches); 606 for (cur_instr = STAILQ_FIRST(&seq_program); 607 cur_instr != NULL; 608 cur_instr = STAILQ_NEXT(cur_instr, links), instrcount++) { 609 610 /* 611 * XXX XXX XXX: What exactly are we trying to do here? 612 * 'func_values' is always NULL, so check_patch will 613 * necessarily crash. 614 */ 615 if (check_patch(&cur_patch, instrcount, 616 &skip_addr, func_values) == 0) { 617 /* Don't count this instruction as it is in a patch 618 * that was removed. 619 */ 620 continue; 621 } 622 623 while (line < cur_instr->srcline) { 624 fgets(buf, sizeof(buf), ifile); 625 fprintf(listfile, "\t\t%s", buf); 626 line++; 627 } 628 fprintf(listfile, "%03x %02x%02x%02x%02x", instrptr, 629 #if BYTE_ORDER == LITTLE_ENDIAN 630 cur_instr->format.bytes[0], 631 cur_instr->format.bytes[1], 632 cur_instr->format.bytes[2], 633 cur_instr->format.bytes[3]); 634 #else 635 cur_instr->format.bytes[3], 636 cur_instr->format.bytes[2], 637 cur_instr->format.bytes[1], 638 cur_instr->format.bytes[0]); 639 #endif 640 fgets(buf, sizeof(buf), ifile); 641 fprintf(listfile, "\t%s", buf); 642 line++; 643 instrptr++; 644 } 645 /* Dump the remainder of the file */ 646 while(fgets(buf, sizeof(buf), ifile) != NULL) 647 fprintf(listfile, "\t\t%s", buf); 648 649 fclose(ifile); 650 } 651 652 static int 653 check_patch(patch_t **start_patch, int start_instr, 654 int *skip_addr, int *func_vals) 655 { 656 patch_t *cur_patch; 657 658 cur_patch = *start_patch; 659 660 while (cur_patch != NULL && start_instr == cur_patch->begin) { 661 if (func_vals[cur_patch->patch_func] == 0) { 662 int skip; 663 664 /* Start rejecting code */ 665 *skip_addr = start_instr + cur_patch->skip_instr; 666 for (skip = cur_patch->skip_patch; 667 skip > 0 && cur_patch != NULL; 668 skip--) 669 cur_patch = STAILQ_NEXT(cur_patch, links); 670 } else { 671 /* Accepted this patch. Advance to the next 672 * one and wait for our instruction pointer to 673 * hit this point. 674 */ 675 cur_patch = STAILQ_NEXT(cur_patch, links); 676 } 677 } 678 679 *start_patch = cur_patch; 680 if (start_instr < *skip_addr) 681 /* Still skipping */ 682 return (0); 683 684 return (1); 685 } 686 687 /* 688 * Print out error information if appropriate, and clean up before 689 * terminating the program. 690 */ 691 void 692 stop(const char *string, int err_code) 693 { 694 if (string != NULL) { 695 fprintf(stderr, "%s: ", appname); 696 if (yyfilename != NULL) { 697 fprintf(stderr, "Stopped at file %s, line %d - ", 698 yyfilename, yylineno); 699 } 700 fprintf(stderr, "%s\n", string); 701 } 702 703 if (ofile != NULL) { 704 fclose(ofile); 705 if (err_code != 0) { 706 fprintf(stderr, "%s: Removing %s due to error\n", 707 appname, ofilename); 708 unlink(ofilename); 709 } 710 } 711 712 if (regfile != NULL) { 713 fclose(regfile); 714 if (err_code != 0) { 715 fprintf(stderr, "%s: Removing %s due to error\n", 716 appname, regfilename); 717 unlink(regfilename); 718 } 719 } 720 721 if (listfile != NULL) { 722 fclose(listfile); 723 if (err_code != 0) { 724 fprintf(stderr, "%s: Removing %s due to error\n", 725 appname, listfilename); 726 unlink(listfilename); 727 } 728 } 729 730 symlist_free(&patch_functions); 731 symtable_close(); 732 733 exit(err_code); 734 } 735 736 struct instruction * 737 seq_alloc(void) 738 { 739 struct instruction *new_instr; 740 741 new_instr = (struct instruction *)malloc(sizeof(struct instruction)); 742 if (new_instr == NULL) 743 stop("Unable to malloc instruction object", EX_SOFTWARE); 744 memset(new_instr, 0, sizeof(*new_instr)); 745 STAILQ_INSERT_TAIL(&seq_program, new_instr, links); 746 new_instr->srcline = yylineno; 747 return new_instr; 748 } 749 750 critical_section_t * 751 cs_alloc(void) 752 { 753 critical_section_t *new_cs; 754 755 new_cs= (critical_section_t *)malloc(sizeof(critical_section_t)); 756 if (new_cs == NULL) 757 stop("Unable to malloc critical_section object", EX_SOFTWARE); 758 memset(new_cs, 0, sizeof(*new_cs)); 759 760 TAILQ_INSERT_TAIL(&cs_tailq, new_cs, links); 761 return new_cs; 762 } 763 764 scope_t * 765 scope_alloc(void) 766 { 767 scope_t *new_scope; 768 769 new_scope = (scope_t *)malloc(sizeof(scope_t)); 770 if (new_scope == NULL) 771 stop("Unable to malloc scope object", EX_SOFTWARE); 772 memset(new_scope, 0, sizeof(*new_scope)); 773 TAILQ_INIT(&new_scope->inner_scope); 774 775 if (SLIST_FIRST(&scope_stack) != NULL) { 776 TAILQ_INSERT_TAIL(&SLIST_FIRST(&scope_stack)->inner_scope, 777 new_scope, scope_links); 778 } 779 /* This patch is now the current scope */ 780 SLIST_INSERT_HEAD(&scope_stack, new_scope, scope_stack_links); 781 return new_scope; 782 } 783 784 void 785 process_scope(scope_t *scope) 786 { 787 /* 788 * We are "leaving" this scope. We should now have 789 * enough information to process the lists of scopes 790 * we encapsulate. 791 */ 792 scope_t *cur_scope; 793 u_int skip_patch_count; 794 u_int skip_instr_count; 795 796 cur_scope = TAILQ_LAST(&scope->inner_scope, scope_tailq); 797 skip_patch_count = 0; 798 skip_instr_count = 0; 799 while (cur_scope != NULL) { 800 u_int patch0_patch_skip; 801 802 patch0_patch_skip = 0; 803 switch (cur_scope->type) { 804 case SCOPE_IF: 805 case SCOPE_ELSE_IF: 806 if (skip_instr_count != 0) { 807 /* Create a tail patch */ 808 patch0_patch_skip++; 809 cur_scope->patches[1].skip_patch = 810 skip_patch_count + 1; 811 cur_scope->patches[1].skip_instr = 812 skip_instr_count; 813 } 814 815 /* Count Head patch */ 816 patch0_patch_skip++; 817 818 /* Count any patches contained in our inner scope */ 819 patch0_patch_skip += cur_scope->inner_scope_patches; 820 821 cur_scope->patches[0].skip_patch = patch0_patch_skip; 822 cur_scope->patches[0].skip_instr = 823 cur_scope->end_addr - cur_scope->begin_addr; 824 825 skip_instr_count += cur_scope->patches[0].skip_instr; 826 827 skip_patch_count += patch0_patch_skip; 828 if (cur_scope->type == SCOPE_IF) { 829 scope->inner_scope_patches += skip_patch_count; 830 skip_patch_count = 0; 831 skip_instr_count = 0; 832 } 833 break; 834 case SCOPE_ELSE: 835 /* Count any patches contained in our inner scope */ 836 skip_patch_count += cur_scope->inner_scope_patches; 837 838 skip_instr_count += cur_scope->end_addr 839 - cur_scope->begin_addr; 840 break; 841 case SCOPE_ROOT: 842 stop("Unexpected scope type encountered", EX_SOFTWARE); 843 /* NOTREACHED */ 844 } 845 846 cur_scope = TAILQ_PREV(cur_scope, scope_tailq, scope_links); 847 } 848 } 849
Indexes created Sun Sep 21 19:09:51 GMT 2025