exec.c

   1 #include <errno.h>
   2 #include <stdio.h>
   3 #include <string.h>
   4 #include <stdarg.h>
   5
   6 #include "gmqcc.h"
   7
   8 MEM_VEC_FUNCTIONS(qc_program,   prog_section_statement, code)
   9 MEM_VEC_FUNCTIONS(qc_program,   prog_section_def,       defs)
  10 MEM_VEC_FUNCTIONS(qc_program,   prog_section_def,       fields)
  11 MEM_VEC_FUNCTIONS(qc_program,   prog_section_function,  functions)
  12 MEM_VEC_FUNCTIONS(qc_program,   char,                   strings)
  13 MEM_VEC_FUN_APPEND(qc_program,  char,                   strings)
  14 MEM_VEC_FUN_RESIZE(qc_program,  char,                   strings)
  15 MEM_VEC_FUNCTIONS(qc_program,   qcint,                  globals)
  16 MEM_VEC_FUNCTIONS(qc_program,   qcint,                  entitydata)
  17 MEM_VEC_FUNCTIONS(qc_program,   bool,                   entitypool)
  18
  19 MEM_VEC_FUNCTIONS(qc_program,   qcint,         localstack)
  20 MEM_VEC_FUN_APPEND(qc_program,  qcint,         localstack)
  21 MEM_VEC_FUN_RESIZE(qc_program,  qcint,         localstack)
  22 MEM_VEC_FUNCTIONS(qc_program,   qc_exec_stack, stack)
  23
  24 MEM_VEC_FUNCTIONS(qc_program,   size_t, profile)
  25 MEM_VEC_FUN_RESIZE(qc_program,  size_t, profile)
  26
  27 MEM_VEC_FUNCTIONS(qc_program,   prog_builtin, builtins)
  28
  29 static void loaderror(const char *fmt, ...)
  30 {
  31     int     err = errno;
  32     va_list ap;
  33     va_start(ap, fmt);
  34     vprintf(fmt, ap);
  35     va_end(ap);
  36     printf(": %s\n", strerror(err));
  37 }
  38
  39 static void qcvmerror(qc_program *prog, const char *fmt, ...)
  40 {
  41     va_list ap;
  42
  43     prog->vmerror++;
  44
  45     va_start(ap, fmt);
  46     vprintf(fmt, ap);
  47     va_end(ap);
  48     putchar('\n');
  49 }
  50
  51 qc_program* prog_load(const char *filename)
  52 {
  53     qc_program *prog;
  54     prog_header header;
  55     size_t      i;
  56     FILE *file;
  57
  58     file = util_fopen(filename, "rb");
  59     if (!file)
  60         return NULL;
  61
  62     if (fread(&header, sizeof(header), 1, file) != 1) {
  63         loaderror("failed to read header from '%s'", filename);
  64         fclose(file);
  65         return NULL;
  66     }
  67
  68     if (header.version != 6) {
  69         loaderror("header says this is a version %i progs, we need version 6\n", header.version);
  70         fclose(file);
  71         return NULL;
  72     }
  73
  74     prog = (qc_program*)mem_a(sizeof(qc_program));
  75     if (!prog) {
  76         fclose(file);
  77         printf("failed to allocate program data\n");
  78         return NULL;
  79     }
  80     memset(prog, 0, sizeof(*prog));
  81
  82     prog->entityfields = header.entfield;
  83
  84     prog->filename = util_strdup(filename);
  85     if (!prog->filename) {
  86         loaderror("failed to store program name");
  87         goto error;
  88     }
  89
  90 #define read_data(hdrvar, progvar, type)                                         \
  91     if (fseek(file, header.hdrvar.offset, SEEK_SET) != 0) {                      \
  92         loaderror("seek failed");                                                \
  93         goto error;                                                              \
  94     }                                                                            \
  95     prog->progvar##_alloc = header.hdrvar.length;                                \
  96     prog->progvar##_count = header.hdrvar.length;                                \
  97     prog->progvar = (type*)mem_a(header.hdrvar.length * sizeof(*prog->progvar)); \
  98     if (!prog->progvar)                                                          \
  99         goto error;                                                              \
 100     if (fread(prog->progvar, sizeof(*prog->progvar), header.hdrvar.length, file) \
 101         != header.hdrvar.length) {                                               \
 102         loaderror("read failed");                                                \
 103         goto error;                                                              \
 104     }
 105 #define read_data1(x, y) read_data(x, x, y)
 106
 107     read_data (statements, code, prog_section_statement);
 108     read_data1(defs,             prog_section_def);
 109     read_data1(fields,           prog_section_def);
 110     read_data1(functions,        prog_section_function);
 111     read_data1(strings,          char);
 112     read_data1(globals,          qcint);
 113
 114     fclose(file);
 115
 116     /* profile counters */
 117     if (!qc_program_profile_resize(prog, prog->code_count))
 118         goto error;
 119
 120     /* Add tempstring area */
 121     prog->tempstring_start = prog->strings_count;
 122     prog->tempstring_at    = prog->strings_count;
 123     if (!qc_program_strings_resize(prog, prog->strings_count + 16*1024))
 124         goto error;
 125
 126     /* spawn the world entity */
 127     if (!qc_program_entitypool_add(prog, true)) {
 128         loaderror("failed to allocate world entity\n");
 129         goto error;
 130     }
 131     for (i = 0; i < prog->entityfields; ++i) {
 132         if (!qc_program_entitydata_add(prog, 0)) {
 133             loaderror("failed to allocate world data\n");
 134             goto error;
 135         }
 136     }
 137     prog->entities = 1;
 138
 139     return prog;
 140
 141 error:
 142     if (prog->filename)   mem_d(prog->filename);
 143     if (prog->code)       mem_d(prog->code);
 144     if (prog->defs)       mem_d(prog->defs);
 145     if (prog->fields)     mem_d(prog->fields);
 146     if (prog->functions)  mem_d(prog->functions);
 147     if (prog->strings)    mem_d(prog->strings);
 148     if (prog->globals)    mem_d(prog->globals);
 149     if (prog->entitydata) mem_d(prog->entitydata);
 150     if (prog->entitypool) mem_d(prog->entitypool);
 151     mem_d(prog);
 152     return NULL;
 153 }
 154
 155 void prog_delete(qc_program *prog)
 156 {
 157     if (prog->filename) mem_d(prog->filename);
 158     MEM_VECTOR_CLEAR(prog, code);
 159     MEM_VECTOR_CLEAR(prog, defs);
 160     MEM_VECTOR_CLEAR(prog, fields);
 161     MEM_VECTOR_CLEAR(prog, functions);
 162     MEM_VECTOR_CLEAR(prog, strings);
 163     MEM_VECTOR_CLEAR(prog, globals);
 164     MEM_VECTOR_CLEAR(prog, entitydata);
 165     MEM_VECTOR_CLEAR(prog, entitypool);
 166     MEM_VECTOR_CLEAR(prog, localstack);
 167     MEM_VECTOR_CLEAR(prog, stack);
 168     MEM_VECTOR_CLEAR(prog, profile);
 169
 170     if (prog->builtins_alloc) {
 171         MEM_VECTOR_CLEAR(prog, builtins);
 172     }
 173     /* otherwise the builtins were statically allocated */
 174     mem_d(prog);
 175 }
 176
 177 /***********************************************************************
 178  * VM code
 179  */
 180
 181 char* prog_getstring(qc_program *prog, qcint str)
 182 {
 183     if (str < 0 || str >= prog->strings_count)
 184         return "<<<invalid string>>>";
 185     return prog->strings + str;
 186 }
 187
 188 prog_section_def* prog_entfield(qc_program *prog, qcint off)
 189 {
 190     size_t i;
 191     for (i = 0; i < prog->fields_count; ++i) {
 192         if (prog->fields[i].offset == off)
 193             return (prog->fields + i);
 194     }
 195     return NULL;
 196 }
 197
 198 prog_section_def* prog_getdef(qc_program *prog, qcint off)
 199 {
 200     size_t i;
 201     for (i = 0; i < prog->defs_count; ++i) {
 202         if (prog->defs[i].offset == off)
 203             return (prog->defs + i);
 204     }
 205     return NULL;
 206 }
 207
 208 qcany* prog_getedict(qc_program *prog, qcint e)
 209 {
 210     if (e >= prog->entitypool_count) {
 211         prog->vmerror++;
 212         printf("Accessing out of bounds edict %i\n", (int)e);
 213         e = 0;
 214     }
 215     return (qcany*)(prog->entitydata + (prog->entityfields * e));
 216 }
 217
 218 qcint prog_spawn_entity(qc_program *prog)
 219 {
 220     size_t i;
 221     qcint  e;
 222     for (e = 0; e < (qcint)prog->entitypool_count; ++e) {
 223         if (!prog->entitypool[e]) {
 224             char *data = (char*)(prog->entitydata + (prog->entityfields * e));
 225             memset(data, 0, prog->entityfields * sizeof(qcint));
 226             return e;
 227         }
 228     }
 229     if (!qc_program_entitypool_add(prog, true)) {
 230         prog->vmerror++;
 231         printf("Failed to allocate entity\n");
 232         return 0;
 233     }
 234     prog->entities++;
 235     for (i = 0; i < prog->entityfields; ++i) {
 236         if (!qc_program_entitydata_add(prog, 0)) {
 237             printf("Failed to allocate entity\n");
 238             return 0;
 239         }
 240     }
 241     return e;
 242 }
 243
 244 void prog_free_entity(qc_program *prog, qcint e)
 245 {
 246     if (!e) {
 247         prog->vmerror++;
 248         printf("Trying to free world entity\n");
 249         return;
 250     }
 251     if (e >= prog->entitypool_count) {
 252         prog->vmerror++;
 253         printf("Trying to free out of bounds entity\n");
 254         return;
 255     }
 256     if (!prog->entitypool[e]) {
 257         prog->vmerror++;
 258         printf("Double free on entity\n");
 259         return;
 260     }
 261     prog->entitypool[e] = false;
 262 }
 263
 264 qcint prog_tempstring(qc_program *prog, const char *_str)
 265 {
 266     /* we don't access it, but the macro-generated functions don't use
 267      * const
 268      */
 269     char *str = (char*)_str;
 270
 271     size_t len = strlen(str);
 272     size_t at = prog->tempstring_at;
 273
 274     /* when we reach the end we start over */
 275     if (at + len >= prog->strings_count)
 276         at = prog->tempstring_start;
 277
 278     /* when it doesn't fit, reallocate */
 279     if (at + len >= prog->strings_count)
 280     {
 281         prog->strings_count = at;
 282         if (!qc_program_strings_append(prog, str, len+1)) {
 283             prog->vmerror = VMERR_TEMPSTRING_ALLOC;
 284             return 0;
 285         }
 286         return at;
 287     }
 288
 289     /* when it fits, just copy */
 290     memcpy(prog->strings + at, str, len+1);
 291     prog->tempstring_at += len+1;
 292     return at;
 293 }
 294
 295 static int print_escaped_string(const char *str)
 296 {
 297     int len = 2;
 298     putchar('"');
 299     while (*str) {
 300         switch (*str) {
 301             case '\a': len += 2; putchar('\\'); putchar('a'); break;
 302             case '\b': len += 2; putchar('\\'); putchar('b'); break;
 303             case '\r': len += 2; putchar('\\'); putchar('r'); break;
 304             case '\n': len += 2; putchar('\\'); putchar('n'); break;
 305             case '\t': len += 2; putchar('\\'); putchar('t'); break;
 306             case '\f': len += 2; putchar('\\'); putchar('f'); break;
 307             case '\v': len += 2; putchar('\\'); putchar('v'); break;
 308             case '\\': len += 2; putchar('\\'); putchar('\\'); break;
 309             case '"':  len += 2; putchar('\\'); putchar('"'); break;
 310             default:
 311                 ++len;
 312                 putchar(*str);
 313                 break;
 314         }
 315         ++str;
 316     }
 317     putchar('"');
 318     return len;
 319 }
 320
 321 static void trace_print_global(qc_program *prog, unsigned int glob, int vtype)
 322 {
 323     static char spaces[40+1] = "                                        ";
 324     prog_section_def *def;
 325     qcany    *value;
 326     int       len;
 327
 328     if (!glob) {
 329         len = printf("<null>,");
 330         goto done;
 331     }
 332
 333     def = prog_getdef(prog, glob);
 334     value = (qcany*)(&prog->globals[glob]);
 335
 336     if (def) {
 337         len = printf("[%s] ", prog_getstring(prog, def->name));
 338         vtype = def->type;
 339     }
 340     else
 341         len = printf("[@%u] ", glob);
 342
 343     switch (vtype) {
 344         case TYPE_VOID:
 345         case TYPE_ENTITY:
 346         case TYPE_FIELD:
 347         case TYPE_FUNCTION:
 348         case TYPE_POINTER:
 349             len += printf("%i,", value->_int);
 350             break;
 351         case TYPE_VECTOR:
 352             len += printf("'%g %g %g',", value->vector[0],
 353                                          value->vector[1],
 354                                          value->vector[2]);
 355             break;
 356         case TYPE_STRING:
 357             len += print_escaped_string(prog_getstring(prog, value->string));
 358             len += printf(",");
 359             /* len += printf("\"%s\",", prog_getstring(prog, value->string)); */
 360             break;
 361         case TYPE_FLOAT:
 362         default:
 363             len += printf("%g,", value->_float);
 364             break;
 365     }
 366 done:
 367     if (len < sizeof(spaces)-1) {
 368         spaces[sizeof(spaces)-1-len] = 0;
 369         printf(spaces);
 370         spaces[sizeof(spaces)-1-len] = ' ';
 371     }
 372 }
 373
 374 static void prog_print_statement(qc_program *prog, prog_section_statement *st)
 375 {
 376     if (st->opcode >= (sizeof(asm_instr)/sizeof(asm_instr[0]))) {
 377         printf("<illegal instruction %d>\n", st->opcode);
 378         return;
 379     }
 380     printf(" <> %-12s", asm_instr[st->opcode].m);
 381     if (st->opcode >= INSTR_IF &&
 382         st->opcode <= INSTR_IFNOT)
 383     {
 384         trace_print_global(prog, st->o1.u1, TYPE_FLOAT);
 385         printf("%d\n", st->o2.s1);
 386     }
 387     else if (st->opcode >= INSTR_CALL0 &&
 388              st->opcode <= INSTR_CALL8)
 389     {
 390         printf("\n");
 391     }
 392     else if (st->opcode == INSTR_GOTO)
 393     {
 394         printf("%i\n", st->o1.s1);
 395     }
 396     else
 397     {
 398         int t[3] = { TYPE_FLOAT, TYPE_FLOAT, TYPE_FLOAT };
 399         switch (st->opcode)
 400         {
 401             case INSTR_MUL_FV:
 402                 t[1] = t[2] = TYPE_VECTOR;
 403                 break;
 404             case INSTR_MUL_VF:
 405                 t[0] = t[2] = TYPE_VECTOR;
 406                 break;
 407             case INSTR_MUL_V:
 408                 t[0] = t[1] = TYPE_VECTOR;
 409                 break;
 410             case INSTR_ADD_V:
 411             case INSTR_SUB_V:
 412             case INSTR_EQ_V:
 413             case INSTR_NE_V:
 414                 t[0] = t[1] = t[2] = TYPE_VECTOR;
 415                 break;
 416             case INSTR_EQ_S:
 417             case INSTR_NE_S:
 418                 t[0] = t[1] = TYPE_STRING;
 419                 break;
 420             case INSTR_STORE_F:
 421             case INSTR_STOREP_F:
 422                 t[2] = -1;
 423                 break;
 424             case INSTR_STORE_V:
 425                 t[0] = t[1] = TYPE_VECTOR; t[2] = -1;
 426                 break;
 427             case INSTR_STORE_S:
 428                 t[0] = t[1] = TYPE_STRING; t[2] = -1;
 429                 break;
 430             case INSTR_STORE_ENT:
 431                 t[0] = t[1] = TYPE_ENTITY; t[2] = -1;
 432                 break;
 433             case INSTR_STORE_FLD:
 434                 t[0] = t[1] = TYPE_FIELD; t[2] = -1;
 435                 break;
 436             case INSTR_STORE_FNC:
 437                 t[0] = t[1] = TYPE_FUNCTION; t[2] = -1;
 438                 break;
 439             case INSTR_STOREP_V:
 440                 t[0] = TYPE_VECTOR; t[1] = TYPE_ENTITY; t[2] = -1;
 441                 break;
 442             case INSTR_STOREP_S:
 443                 t[0] = TYPE_STRING; t[1] = TYPE_ENTITY; t[2] = -1;
 444                 break;
 445             case INSTR_STOREP_ENT:
 446                 t[0] = TYPE_ENTITY; t[1] = TYPE_ENTITY; t[2] = -1;
 447                 break;
 448             case INSTR_STOREP_FLD:
 449                 t[0] = TYPE_FIELD; t[1] = TYPE_ENTITY; t[2] = -1;
 450                 break;
 451             case INSTR_STOREP_FNC:
 452                 t[0] = TYPE_FUNCTION; t[1] = TYPE_ENTITY; t[2] = -1;
 453                 break;
 454         }
 455         if (t[0] >= 0) trace_print_global(prog, st->o1.u1, t[0]);
 456         else           printf("(none),          ");
 457         if (t[1] >= 0) trace_print_global(prog, st->o2.u1, t[1]);
 458         else           printf("(none),          ");
 459         if (t[2] >= 0) trace_print_global(prog, st->o3.u1, t[2]);
 460         else           printf("(none)");
 461         printf("\n");
 462     }
 463     fflush(stdout);
 464 }
 465
 466 static qcint prog_enterfunction(qc_program *prog, prog_section_function *func)
 467 {
 468     qc_exec_stack st;
 469     size_t p, parampos;
 470
 471     /* back up locals */
 472     st.localsp  = prog->localstack_count;
 473     st.stmt     = prog->statement;
 474     st.function = func;
 475
 476 #ifdef QCVM_BACKUP_STRATEGY_CALLER_VARS
 477     if (prog->stack_count)
 478     {
 479         prog_section_function *cur;
 480         cur = prog->stack[prog->stack_count-1].function;
 481         if (cur)
 482         {
 483             qcint *globals = prog->globals + cur->firstlocal;
 484             if (!qc_program_localstack_append(prog, globals, cur->locals))
 485             {
 486                 printf("out of memory\n");
 487                 exit(1);
 488             }
 489         }
 490     }
 491 #else
 492     {
 493         qcint *globals = prog->globals + func->firstlocal;
 494         if (!qc_program_localstack_append(prog, globals, func->locals))
 495         {
 496             printf("out of memory\n");
 497             exit(1);
 498         }
 499     }
 500 #endif
 501
 502     /* copy parameters */
 503     parampos = func->firstlocal;
 504     for (p = 0; p < func->nargs; ++p)
 505     {
 506         size_t s;
 507         for (s = 0; s < func->argsize[p]; ++s) {
 508             prog->globals[parampos] = prog->globals[OFS_PARM0 + 3*p + s];
 509             ++parampos;
 510         }
 511     }
 512
 513     if (!qc_program_stack_add(prog, st)) {
 514         printf("out of memory\n");
 515         exit(1);
 516     }
 517
 518     return func->entry;
 519 }
 520
 521 static qcint prog_leavefunction(qc_program *prog)
 522 {
 523     prog_section_function *prev = NULL;
 524     size_t oldsp;
 525
 526     qc_exec_stack st = prog->stack[prog->stack_count-1];
 527
 528 #ifdef QCVM_BACKUP_STRATEGY_CALLER_VARS
 529     if (prog->stack_count > 1) {
 530         prev  = prog->stack[prog->stack_count-2].function;
 531         oldsp = prog->stack[prog->stack_count-2].localsp;
 532     }
 533 #else
 534     prev  = prog->stack[prog->stack_count-1].function;
 535     oldsp = prog->stack[prog->stack_count-1].localsp;
 536 #endif
 537     if (prev) {
 538         qcint *globals = prog->globals + prev->firstlocal;
 539         memcpy(globals, prog->localstack + oldsp, prev->locals);
 540         if (!qc_program_localstack_resize(prog, oldsp)) {
 541             printf("out of memory\n");
 542             exit(1);
 543         }
 544     }
 545
 546     if (!qc_program_stack_remove(prog, prog->stack_count-1)) {
 547         printf("out of memory\n");
 548         exit(1);
 549     }
 550
 551     return st.stmt - 1; /* offset the ++st */
 552 }
 553
 554 bool prog_exec(qc_program *prog, prog_section_function *func, size_t flags, long maxjumps)
 555 {
 556     long jumpcount = 0;
 557     prog_section_statement *st;
 558
 559     prog->vmerror = 0;
 560
 561     st = prog->code + prog_enterfunction(prog, func);
 562     --st;
 563     switch (flags)
 564     {
 565         default:
 566         case 0:
 567         {
 568 #define QCVM_PROFILE 0
 569 #define QCVM_TRACE   0
 570 #           include "execloop.h"
 571             break;
 572         }
 573         case (VMXF_TRACE):
 574         {
 575 #define QCVM_PROFILE 0
 576 #define QCVM_TRACE   1
 577 #           include "execloop.h"
 578             break;
 579         }
 580         case (VMXF_PROFILE):
 581         {
 582 #define QCVM_PROFILE 1
 583 #define QCVM_TRACE   0
 584 #           include "execloop.h"
 585             break;
 586         }
 587         case (VMXF_TRACE|VMXF_PROFILE):
 588         {
 589 #define QCVM_PROFILE 1
 590 #define QCVM_TRACE   1
 591 #           include "execloop.h"
 592             break;
 593         }
 594     };
 595
 596 cleanup:
 597     prog->localstack_count = 0;
 598     prog->stack_count = 0;
 599     if (prog->vmerror)
 600         return false;
 601     return true;
 602 }
 603
 604 /***********************************************************************
 605  * main for when building the standalone executor
 606  */
 607
 608 #if defined(QCVM_EXECUTOR)
 609 bool        opts_debug    = false;
 610 bool        opts_memchk   = false;
 611
 612 #define CheckArgs(num) do {                                                    \
 613     if (prog->argc != (num)) {                                                 \
 614         prog->vmerror++;                                                       \
 615         printf("ERROR: invalid number of arguments for %s: %i, expected %i\n", \
 616         __FUNCTION__, prog->argc, (num));                                      \
 617         return -1;                                                             \
 618     }                                                                          \
 619 } while (0)
 620
 621 #define GetGlobal(idx) ((qcany*)(prog->globals + (idx)))
 622 #define GetArg(num) GetGlobal(OFS_PARM0 + 3*(num))
 623 #define Return(any) *(GetGlobal(OFS_RETURN)) = (any)
 624
 625 static int qc_print(qc_program *prog)
 626 {
 627     size_t i;
 628     for (i = 0; i < prog->argc; ++i) {
 629         qcany *str = (qcany*)(prog->globals + OFS_PARM0 + 3*i);
 630         printf("%s", prog_getstring(prog, str->string));
 631     }
 632     return 0;
 633 }
 634
 635 static int qc_ftos(qc_program *prog)
 636 {
 637     char buffer[512];
 638     qcany *num;
 639     qcany str;
 640     CheckArgs(1);
 641     num = GetArg(0);
 642     snprintf(buffer, sizeof(buffer), "%g", num->_float);
 643     str.string = prog_tempstring(prog, buffer);
 644     Return(str);
 645     return 0;
 646 }
 647
 648 static int qc_spawn(qc_program *prog)
 649 {
 650     qcany ent;
 651     CheckArgs(0);
 652     ent.edict = prog_spawn_entity(prog);
 653     Return(ent);
 654     return (ent.edict ? 0 : -1);
 655 }
 656
 657 static int qc_kill(qc_program *prog)
 658 {
 659     qcany *ent;
 660     CheckArgs(1);
 661     ent = GetArg(0);
 662     prog_free_entity(prog, ent->edict);
 663     return 0;
 664 }
 665
 666 static prog_builtin qc_builtins[] = {
 667     NULL,
 668     &qc_print,
 669     &qc_ftos,
 670     &qc_spawn,
 671     &qc_kill
 672 };
 673 static size_t qc_builtins_count = sizeof(qc_builtins) / sizeof(qc_builtins[0]);
 674
 675 static const char *arg0 = NULL;
 676
 677 void usage()
 678 {
 679     printf("usage: [-debug] %s file\n", arg0);
 680     exit(1);
 681 }
 682
 683 int main(int argc, char **argv)
 684 {
 685     size_t      i;
 686     qcint       fnmain = -1;
 687     qc_program *prog;
 688     size_t      xflags = VMXF_DEFAULT;
 689
 690     arg0 = argv[0];
 691
 692     if (argc < 2)
 693         usage();
 694
 695     while (argc > 2) {
 696         if (!strcmp(argv[1], "-trace")) {
 697             --argc;
 698             ++argv;
 699             xflags |= VMXF_TRACE;
 700         }
 701         else if (!strcmp(argv[1], "-profile")) {
 702             --argc;
 703             ++argv;
 704             xflags |= VMXF_PROFILE;
 705         }
 706         else
 707             usage();
 708     }
 709
 710
 711     prog = prog_load(argv[1]);
 712     if (!prog) {
 713         printf("failed to load program '%s'\n", argv[1]);
 714         exit(1);
 715     }
 716
 717     prog->builtins       = qc_builtins;
 718     prog->builtins_count = qc_builtins_count;
 719     prog->builtins_alloc = 0;
 720
 721     for (i = 1; i < prog->functions_count; ++i) {
 722         const char *name = prog_getstring(prog, prog->functions[i].name);
 723         /* printf("Found function: %s\n", name); */
 724         if (!strcmp(name, "main"))
 725             fnmain = (qcint)i;
 726     }
 727     printf("Entity field space: %i\n", (int)prog->entityfields);
 728     if (fnmain > 0)
 729     {
 730         prog_exec(prog, &prog->functions[fnmain], xflags, VM_JUMPS_DEFAULT);
 731     }
 732     else
 733         printf("No main function found\n");
 734
 735     prog_delete(prog);
 736     return 0;
 737 }
 738 #endif