libtcc.c

   1 /*
   2  *  TCC - Tiny C Compiler
   3  *
   4  *  Copyright (c) 2001-2004 Fabrice Bellard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "tcc.h"
  22
  23 /********************************************************/
  24 /* global variables */
  25
  26 /* use GNU C extensions */
  27 ST_DATA int gnu_ext = 1;
  28
  29 /* use TinyCC extensions */
  30 ST_DATA int tcc_ext = 1;
  31
  32 /* XXX: get rid of this ASAP */
  33 ST_DATA struct TCCState *tcc_state;
  34
  35 /********************************************************/
  36
  37 #ifdef ONE_SOURCE
  38 #include "tccpp.c"
  39 #include "tccgen.c"
  40 #include "tccelf.c"
  41 #include "tccrun.c"
  42 #ifdef TCC_TARGET_I386
  43 #include "i386-gen.c"
  44 #endif
  45 #ifdef TCC_TARGET_ARM
  46 #include "arm-gen.c"
  47 #endif
  48 #ifdef TCC_TARGET_ARM64
  49 #include "arm64-gen.c"
  50 #endif
  51 #ifdef TCC_TARGET_C67
  52 #include "c67-gen.c"
  53 #endif
  54 #ifdef TCC_TARGET_X86_64
  55 #include "x86_64-gen.c"
  56 #endif
  57 #ifdef CONFIG_TCC_ASM
  58 #include "tccasm.c"
  59 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
  60 #include "i386-asm.c"
  61 #endif
  62 #endif
  63 #ifdef TCC_TARGET_COFF
  64 #include "tcccoff.c"
  65 #endif
  66 #ifdef TCC_TARGET_PE
  67 #include "tccpe.c"
  68 #endif
  69 #endif /* ONE_SOURCE */
  70
  71 /********************************************************/
  72 #ifndef CONFIG_TCC_ASM
  73 ST_FUNC void asm_instr(void)
  74 {
  75     tcc_error("inline asm() not supported");
  76 }
  77 ST_FUNC void asm_global_instr(void)
  78 {
  79     tcc_error("inline asm() not supported");
  80 }
  81 #endif
  82
  83 /********************************************************/
  84 #ifdef _WIN32
  85 static char *normalize_slashes(char *path)
  86 {
  87     char *p;
  88     for (p = path; *p; ++p)
  89         if (*p == '\\')
  90             *p = '/';
  91     return path;
  92 }
  93
  94 static HMODULE tcc_module;
  95
  96 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
  97 static void tcc_set_lib_path_w32(TCCState *s)
  98 {
  99     char path[1024], *p;
 100     GetModuleFileNameA(tcc_module, path, sizeof path);
 101     p = tcc_basename(normalize_slashes(strlwr(path)));
 102     if (p - 5 > path && 0 == strncmp(p - 5, "/bin/", 5))
 103         p -= 5;
 104     else if (p > path)
 105         p--;
 106     *p = 0;
 107     tcc_set_lib_path(s, path);
 108 }
 109
 110 #ifdef TCC_TARGET_PE
 111 static void tcc_add_systemdir(TCCState *s)
 112 {
 113     char buf[1000];
 114     GetSystemDirectory(buf, sizeof buf);
 115     tcc_add_library_path(s, normalize_slashes(buf));
 116 }
 117 #endif
 118
 119 #ifndef CONFIG_TCC_STATIC
 120 static void dlclose(void *p)
 121 {
 122     FreeLibrary((HMODULE)p);
 123 }
 124 #endif
 125
 126 #ifdef LIBTCC_AS_DLL
 127 BOOL WINAPI DllMain (HINSTANCE hDll, DWORD dwReason, LPVOID lpReserved)
 128 {
 129     if (DLL_PROCESS_ATTACH == dwReason)
 130         tcc_module = hDll;
 131     return TRUE;
 132 }
 133 #endif
 134 #endif
 135
 136 /********************************************************/
 137 /* copy a string and truncate it. */
 138 ST_FUNC char *pstrcpy(char *buf, int buf_size, const char *s)
 139 {
 140     char *q, *q_end;
 141     int c;
 142
 143     if (buf_size > 0) {
 144         q = buf;
 145         q_end = buf + buf_size - 1;
 146         while (q < q_end) {
 147             c = *s++;
 148             if (c == '\0')
 149                 break;
 150             *q++ = c;
 151         }
 152         *q = '\0';
 153     }
 154     return buf;
 155 }
 156
 157 /* strcat and truncate. */
 158 ST_FUNC char *pstrcat(char *buf, int buf_size, const char *s)
 159 {
 160     int len;
 161     len = strlen(buf);
 162     if (len < buf_size)
 163         pstrcpy(buf + len, buf_size - len, s);
 164     return buf;
 165 }
 166
 167 ST_FUNC char *pstrncpy(char *out, const char *in, size_t num)
 168 {
 169     memcpy(out, in, num);
 170     out[num] = '\0';
 171     return out;
 172 }
 173
 174 /* extract the basename of a file */
 175 PUB_FUNC char *tcc_basename(const char *name)
 176 {
 177     char *p = strchr(name, 0);
 178     while (p > name && !IS_DIRSEP(p[-1]))
 179         --p;
 180     return p;
 181 }
 182
 183 /* extract extension part of a file
 184  *
 185  * (if no extension, return pointer to end-of-string)
 186  */
 187 PUB_FUNC char *tcc_fileextension (const char *name)
 188 {
 189     char *b = tcc_basename(name);
 190     char *e = strrchr(b, '.');
 191     return e ? e : strchr(b, 0);
 192 }
 193
 194 /********************************************************/
 195 /* memory management */
 196
 197 #undef free
 198 #undef malloc
 199 #undef realloc
 200
 201 #ifndef MEM_DEBUG
 202
 203 PUB_FUNC void tcc_free(void *ptr)
 204 {
 205     free(ptr);
 206 }
 207
 208 PUB_FUNC void *tcc_malloc(unsigned long size)
 209 {
 210     void *ptr;
 211     ptr = malloc(size);
 212     if (!ptr && size)
 213         tcc_error("memory full (malloc)");
 214     return ptr;
 215 }
 216
 217 PUB_FUNC void *tcc_mallocz(unsigned long size)
 218 {
 219     void *ptr;
 220     ptr = tcc_malloc(size);
 221     memset(ptr, 0, size);
 222     return ptr;
 223 }
 224
 225 PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
 226 {
 227     void *ptr1;
 228     ptr1 = realloc(ptr, size);
 229     if (!ptr1 && size)
 230         tcc_error("memory full (realloc)");
 231     return ptr1;
 232 }
 233
 234 PUB_FUNC char *tcc_strdup(const char *str)
 235 {
 236     char *ptr;
 237     ptr = tcc_malloc(strlen(str) + 1);
 238     strcpy(ptr, str);
 239     return ptr;
 240 }
 241
 242 PUB_FUNC void tcc_memstats(int bench)
 243 {
 244 }
 245
 246 #else
 247
 248 #define MEM_DEBUG_MAGIC1 0xFEEDDEB1
 249 #define MEM_DEBUG_MAGIC2 0xFEEDDEB2
 250 #define MEM_DEBUG_FILE_LEN 15
 251
 252 struct mem_debug_header {
 253     size_t      magic1;
 254     size_t      size;
 255     struct mem_debug_header *prev;
 256     struct mem_debug_header *next;
 257     size_t      line_num;
 258     char        file_name[MEM_DEBUG_FILE_LEN + 1];
 259     size_t      magic2;
 260 };
 261
 262 typedef struct mem_debug_header mem_debug_header_t;
 263
 264 static mem_debug_header_t *mem_debug_chain;
 265 static size_t mem_cur_size;
 266 static size_t mem_max_size;
 267
 268 PUB_FUNC void *tcc_malloc_debug(unsigned long size, const char *file, int line)
 269 {
 270     void *ptr;
 271     int ofs;
 272
 273     mem_debug_header_t *header;
 274
 275     ptr = malloc(sizeof(mem_debug_header_t) + size);
 276     if (!ptr)
 277         tcc_error("memory full (malloc)");
 278
 279     mem_cur_size += size;
 280     if (mem_cur_size > mem_max_size)
 281         mem_max_size = mem_cur_size;
 282
 283     header = (mem_debug_header_t *)ptr;
 284
 285     header->magic1 = MEM_DEBUG_MAGIC1;
 286     header->magic2 = MEM_DEBUG_MAGIC2;
 287     header->size = size;
 288     header->line_num = line;
 289
 290     ofs = strlen(file) - MEM_DEBUG_FILE_LEN;
 291     strncpy(header->file_name, file + (ofs > 0 ? ofs : 0), MEM_DEBUG_FILE_LEN);
 292     header->file_name[MEM_DEBUG_FILE_LEN] = 0;
 293
 294     header->next = mem_debug_chain;
 295     header->prev = NULL;
 296
 297     if (header->next)
 298         header->next->prev = header;
 299
 300     mem_debug_chain = header;
 301
 302     ptr = (char *)ptr + sizeof(mem_debug_header_t);
 303     return ptr;
 304 }
 305
 306 PUB_FUNC void tcc_free_debug(void *ptr)
 307 {
 308     mem_debug_header_t *header;
 309
 310     if (!ptr)
 311         return;
 312
 313     ptr = (char *)ptr - sizeof(mem_debug_header_t);
 314     header = (mem_debug_header_t *)ptr;
 315     if (header->magic1 != MEM_DEBUG_MAGIC1 ||
 316         header->magic2 != MEM_DEBUG_MAGIC2 ||
 317         header->size == (size_t)-1 )
 318     {
 319         tcc_error("tcc_free check failed");
 320     }
 321
 322     mem_cur_size -= header->size;
 323     header->size = (size_t)-1;
 324
 325     if (header->next)
 326         header->next->prev = header->prev;
 327
 328     if (header->prev)
 329         header->prev->next = header->next;
 330
 331     if (header == mem_debug_chain)
 332         mem_debug_chain = header->next;
 333
 334     free(ptr);
 335 }
 336
 337
 338 PUB_FUNC void *tcc_mallocz_debug(unsigned long size, const char *file, int line)
 339 {
 340     void *ptr;
 341     ptr = tcc_malloc_debug(size,file,line);
 342     memset(ptr, 0, size);
 343     return ptr;
 344 }
 345
 346 PUB_FUNC void *tcc_realloc_debug(void *ptr, unsigned long size, const char *file, int line)
 347 {
 348     mem_debug_header_t *header;
 349     int mem_debug_chain_update = 0;
 350
 351     if (!ptr) {
 352         ptr = tcc_malloc_debug(size, file, line);
 353         return ptr;
 354     }
 355
 356     ptr = (char *)ptr - sizeof(mem_debug_header_t);
 357     header = (mem_debug_header_t *)ptr;
 358     if (header->magic1 != MEM_DEBUG_MAGIC1 ||
 359         header->magic2 != MEM_DEBUG_MAGIC2 ||
 360         header->size == (size_t)-1 )
 361     {
 362         check_error:
 363             tcc_error("tcc_realloc check failed");
 364     }
 365
 366     mem_debug_chain_update = (header == mem_debug_chain);
 367
 368     mem_cur_size -= header->size;
 369     ptr = realloc(ptr, sizeof(mem_debug_header_t) + size);
 370     if (!ptr)
 371         tcc_error("memory full (realloc)");
 372
 373     header = (mem_debug_header_t *)ptr;
 374     if (header->magic1 != MEM_DEBUG_MAGIC1 ||
 375         header->magic2 != MEM_DEBUG_MAGIC2)
 376     {
 377         goto check_error;
 378     }
 379
 380     mem_cur_size += size;
 381     if (mem_cur_size > mem_max_size)
 382         mem_max_size = mem_cur_size;
 383
 384     header->size = size;
 385     if (header->next)
 386         header->next->prev = header;
 387
 388     if (header->prev)
 389         header->prev->next = header;
 390
 391     if (mem_debug_chain_update)
 392         mem_debug_chain = header;
 393
 394     ptr = (char *)ptr + sizeof(mem_debug_header_t);
 395     return ptr;
 396 }
 397
 398 PUB_FUNC char *tcc_strdup_debug(const char *str, const char *file, int line)
 399 {
 400     char *ptr;
 401     ptr = tcc_malloc_debug(strlen(str) + 1, file, line);
 402     strcpy(ptr, str);
 403     return ptr;
 404 }
 405
 406 PUB_FUNC void tcc_memstats(int bench)
 407 {
 408     if (mem_cur_size) {
 409         mem_debug_header_t *header = mem_debug_chain;
 410
 411         fprintf(stderr, "MEM_DEBUG: mem_leak= %d bytes, mem_max_size= %d bytes\n",
 412             mem_cur_size, mem_max_size);
 413
 414         while (header) {
 415             fprintf(stderr, "  file %s, line %u: %u bytes\n",
 416                 header->file_name, header->line_num, header->size);
 417             header = header->next;
 418         }
 419     }
 420     else if (bench)
 421         fprintf(stderr, "mem_max_size= %d bytes\n", mem_max_size);
 422 }
 423
 424 #undef MEM_DEBUG_MAGIC1
 425 #undef MEM_DEBUG_MAGIC2
 426 #undef MEM_DEBUG_FILE_LEN
 427
 428 #endif
 429
 430 #define free(p) use_tcc_free(p)
 431 #define malloc(s) use_tcc_malloc(s)
 432 #define realloc(p, s) use_tcc_realloc(p, s)
 433
 434 /********************************************************/
 435 /* dynarrays */
 436
 437 ST_FUNC void dynarray_add(void ***ptab, int *nb_ptr, void *data)
 438 {
 439     int nb, nb_alloc;
 440     void **pp;
 441
 442     nb = *nb_ptr;
 443     pp = *ptab;
 444     /* every power of two we double array size */
 445     if ((nb & (nb - 1)) == 0) {
 446         if (!nb)
 447             nb_alloc = 1;
 448         else
 449             nb_alloc = nb * 2;
 450         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 451         *ptab = pp;
 452     }
 453     pp[nb++] = data;
 454     *nb_ptr = nb;
 455 }
 456
 457 ST_FUNC void dynarray_reset(void *pp, int *n)
 458 {
 459     void **p;
 460     for (p = *(void***)pp; *n; ++p, --*n)
 461         if (*p)
 462             tcc_free(*p);
 463     tcc_free(*(void**)pp);
 464     *(void**)pp = NULL;
 465 }
 466
 467 static void tcc_split_path(TCCState *s, void ***p_ary, int *p_nb_ary, const char *in)
 468 {
 469     const char *p;
 470     do {
 471         int c;
 472         CString str;
 473
 474         cstr_new(&str);
 475         for (p = in; c = *p, c != '\0' && c != PATHSEP; ++p) {
 476             if (c == '{' && p[1] && p[2] == '}') {
 477                 c = p[1], p += 2;
 478                 if (c == 'B')
 479                     cstr_cat(&str, s->tcc_lib_path, -1);
 480             } else {
 481                 cstr_ccat(&str, c);
 482             }
 483         }
 484         cstr_ccat(&str, '\0');
 485         dynarray_add(p_ary, p_nb_ary, tcc_strdup(str.data));
 486         cstr_free(&str);
 487         in = p+1;
 488     } while (*p);
 489 }
 490
 491 /********************************************************/
 492
 493 ST_FUNC Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags)
 494 {
 495     Section *sec;
 496
 497     sec = tcc_mallocz(sizeof(Section) + strlen(name));
 498     strcpy(sec->name, name);
 499     sec->sh_type = sh_type;
 500     sec->sh_flags = sh_flags;
 501     switch(sh_type) {
 502     case SHT_HASH:
 503     case SHT_REL:
 504     case SHT_RELA:
 505     case SHT_DYNSYM:
 506     case SHT_SYMTAB:
 507     case SHT_DYNAMIC:
 508         sec->sh_addralign = 4;
 509         break;
 510     case SHT_STRTAB:
 511         sec->sh_addralign = 1;
 512         break;
 513     default:
 514         sec->sh_addralign =  PTR_SIZE; /* gcc/pcc default aligment */
 515         break;
 516     }
 517
 518     if (sh_flags & SHF_PRIVATE) {
 519         dynarray_add((void ***)&s1->priv_sections, &s1->nb_priv_sections, sec);
 520     } else {
 521         sec->sh_num = s1->nb_sections;
 522         dynarray_add((void ***)&s1->sections, &s1->nb_sections, sec);
 523     }
 524
 525     return sec;
 526 }
 527
 528 static void free_section(Section *s)
 529 {
 530     tcc_free(s->data);
 531 }
 532
 533 /* realloc section and set its content to zero */
 534 ST_FUNC void section_realloc(Section *sec, unsigned long new_size)
 535 {
 536     unsigned long size;
 537     unsigned char *data;
 538
 539     size = sec->data_allocated;
 540     if (size == 0)
 541         size = 1;
 542     while (size < new_size)
 543         size = size * 2;
 544     data = tcc_realloc(sec->data, size);
 545     memset(data + sec->data_allocated, 0, size - sec->data_allocated);
 546     sec->data = data;
 547     sec->data_allocated = size;
 548 }
 549
 550 /* reserve at least 'size' bytes in section 'sec' from
 551    sec->data_offset. */
 552 ST_FUNC void *section_ptr_add(Section *sec, addr_t size)
 553 {
 554     size_t offset, offset1;
 555
 556     offset = sec->data_offset;
 557     offset1 = offset + size;
 558     if (offset1 > sec->data_allocated)
 559         section_realloc(sec, offset1);
 560     sec->data_offset = offset1;
 561     return sec->data + offset;
 562 }
 563
 564 /* reserve at least 'size' bytes from section start */
 565 ST_FUNC void section_reserve(Section *sec, unsigned long size)
 566 {
 567     if (size > sec->data_allocated)
 568         section_realloc(sec, size);
 569     if (size > sec->data_offset)
 570         sec->data_offset = size;
 571 }
 572
 573 /* return a reference to a section, and create it if it does not
 574    exists */
 575 ST_FUNC Section *find_section(TCCState *s1, const char *name)
 576 {
 577     Section *sec;
 578     int i;
 579     for(i = 1; i < s1->nb_sections; i++) {
 580         sec = s1->sections[i];
 581         if (!strcmp(name, sec->name))
 582             return sec;
 583     }
 584     /* sections are created as PROGBITS */
 585     return new_section(s1, name, SHT_PROGBITS, SHF_ALLOC);
 586 }
 587
 588 /* update sym->c so that it points to an external symbol in section
 589    'section' with value 'value' */
 590 ST_FUNC void put_extern_sym2(Sym *sym, Section *section,
 591                             addr_t value, unsigned long size,
 592                             int can_add_underscore)
 593 {
 594     int sym_type, sym_bind, sh_num, info, other;
 595     ElfW(Sym) *esym;
 596     const char *name;
 597     char buf1[256];
 598
 599 #ifdef CONFIG_TCC_BCHECK
 600     char buf[32];
 601 #endif
 602
 603     if (section == NULL)
 604         sh_num = SHN_UNDEF;
 605     else if (section == SECTION_ABS)
 606         sh_num = SHN_ABS;
 607     else
 608         sh_num = section->sh_num;
 609
 610     if ((sym->type.t & VT_BTYPE) == VT_FUNC) {
 611         sym_type = STT_FUNC;
 612     } else if ((sym->type.t & VT_BTYPE) == VT_VOID) {
 613         sym_type = STT_NOTYPE;
 614     } else {
 615         sym_type = STT_OBJECT;
 616     }
 617
 618     if (sym->type.t & VT_STATIC)
 619         sym_bind = STB_LOCAL;
 620     else {
 621         if (sym->type.t & VT_WEAK)
 622             sym_bind = STB_WEAK;
 623         else
 624             sym_bind = STB_GLOBAL;
 625     }
 626
 627     if (!sym->c) {
 628         name = get_tok_str(sym->v, NULL);
 629 #ifdef CONFIG_TCC_BCHECK
 630         if (tcc_state->do_bounds_check) {
 631             /* XXX: avoid doing that for statics ? */
 632             /* if bound checking is activated, we change some function
 633                names by adding the "__bound" prefix */
 634             switch(sym->v) {
 635 #ifdef TCC_TARGET_PE
 636             /* XXX: we rely only on malloc hooks */
 637             case TOK_malloc:
 638             case TOK_free:
 639             case TOK_realloc:
 640             case TOK_memalign:
 641             case TOK_calloc:
 642 #endif
 643             case TOK_memcpy:
 644             case TOK_memmove:
 645             case TOK_memset:
 646             case TOK_strlen:
 647             case TOK_strcpy:
 648             case TOK_alloca:
 649                 strcpy(buf, "__bound_");
 650                 strcat(buf, name);
 651                 name = buf;
 652                 break;
 653             }
 654         }
 655 #endif
 656         other = 0;
 657
 658 #ifdef TCC_TARGET_PE
 659         if (sym->type.t & VT_EXPORT)
 660             other |= ST_PE_EXPORT;
 661         if (sym_type == STT_FUNC && sym->type.ref) {
 662             Sym *ref = sym->type.ref;
 663             if (ref->a.func_export)
 664                 other |= ST_PE_EXPORT;
 665             if (ref->a.func_call == FUNC_STDCALL && can_add_underscore) {
 666                 sprintf(buf1, "_%s@%d", name, ref->a.func_args * PTR_SIZE);
 667                 name = buf1;
 668                 other |= ST_PE_STDCALL;
 669                 can_add_underscore = 0;
 670             }
 671         } else {
 672             if (find_elf_sym(tcc_state->dynsymtab_section, name))
 673                 other |= ST_PE_IMPORT;
 674             if (sym->type.t & VT_IMPORT)
 675                 other |= ST_PE_IMPORT;
 676         }
 677 #else
 678         if (! (sym->type.t & VT_STATIC))
 679             other = (sym->type.t & VT_VIS_MASK) >> VT_VIS_SHIFT;
 680 #endif
 681         if (tcc_state->leading_underscore && can_add_underscore) {
 682             buf1[0] = '_';
 683             pstrcpy(buf1 + 1, sizeof(buf1) - 1, name);
 684             name = buf1;
 685         }
 686         if (sym->asm_label) {
 687             name = get_tok_str(sym->asm_label, NULL);
 688         }
 689         info = ELFW(ST_INFO)(sym_bind, sym_type);
 690         sym->c = add_elf_sym(symtab_section, value, size, info, other, sh_num, name);
 691     } else {
 692         esym = &((ElfW(Sym) *)symtab_section->data)[sym->c];
 693         esym->st_value = value;
 694         esym->st_size = size;
 695         esym->st_shndx = sh_num;
 696     }
 697 }
 698
 699 ST_FUNC void put_extern_sym(Sym *sym, Section *section,
 700                            addr_t value, unsigned long size)
 701 {
 702     put_extern_sym2(sym, section, value, size, 1);
 703 }
 704
 705 /* add a new relocation entry to symbol 'sym' in section 's' */
 706 ST_FUNC void greloca(Section *s, Sym *sym, unsigned long offset, int type,
 707                      addr_t addend)
 708 {
 709     int c = 0;
 710     if (sym) {
 711         if (0 == sym->c)
 712             put_extern_sym(sym, NULL, 0, 0);
 713         c = sym->c;
 714     }
 715     /* now we can add ELF relocation info */
 716     put_elf_reloca(symtab_section, s, offset, type, c, addend);
 717 }
 718
 719 ST_FUNC void greloc(Section *s, Sym *sym, unsigned long offset, int type)
 720 {
 721     greloca(s, sym, offset, type, 0);
 722 }
 723
 724 /********************************************************/
 725
 726 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 727 {
 728     int len;
 729     len = strlen(buf);
 730     vsnprintf(buf + len, buf_size - len, fmt, ap);
 731 }
 732
 733 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 734 {
 735     va_list ap;
 736     va_start(ap, fmt);
 737     strcat_vprintf(buf, buf_size, fmt, ap);
 738     va_end(ap);
 739 }
 740
 741 static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 742 {
 743     char buf[2048];
 744     BufferedFile **pf, *f;
 745
 746     buf[0] = '\0';
 747     /* use upper file if inline ":asm:" or token ":paste:" */
 748     for (f = file; f && f->filename[0] == ':'; f = f->prev)
 749      ;
 750     if (f) {
 751         for(pf = s1->include_stack; pf < s1->include_stack_ptr; pf++)
 752             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 753                 (*pf)->filename, (*pf)->line_num);
 754         if (f->line_num > 0) {
 755             strcat_printf(buf, sizeof(buf), "%s:%d: ",
 756                 f->filename, f->line_num - !!(tok_flags & TOK_FLAG_BOL));
 757         } else {
 758             strcat_printf(buf, sizeof(buf), "%s: ",
 759                 f->filename);
 760         }
 761     } else {
 762         strcat_printf(buf, sizeof(buf), "tcc: ");
 763     }
 764     if (is_warning)
 765         strcat_printf(buf, sizeof(buf), "warning: ");
 766     else
 767         strcat_printf(buf, sizeof(buf), "error: ");
 768     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 769
 770     if (!s1->error_func) {
 771         /* default case: stderr */
 772         if (s1->ppfp) /* print a newline during tcc -E */
 773             fprintf(s1->ppfp, "\n"), fflush(s1->ppfp);
 774         fprintf(stderr, "%s\n", buf);
 775         fflush(stderr); /* print error/warning now (win32) */
 776     } else {
 777         s1->error_func(s1->error_opaque, buf);
 778     }
 779     if (!is_warning || s1->warn_error)
 780         s1->nb_errors++;
 781 }
 782
 783 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque,
 784                         void (*error_func)(void *opaque, const char *msg))
 785 {
 786     s->error_opaque = error_opaque;
 787     s->error_func = error_func;
 788 }
 789
 790 /* error without aborting current compilation */
 791 PUB_FUNC void tcc_error_noabort(const char *fmt, ...)
 792 {
 793     TCCState *s1 = tcc_state;
 794     va_list ap;
 795
 796     va_start(ap, fmt);
 797     error1(s1, 0, fmt, ap);
 798     va_end(ap);
 799 }
 800
 801 PUB_FUNC void tcc_error(const char *fmt, ...)
 802 {
 803     TCCState *s1 = tcc_state;
 804     va_list ap;
 805
 806     va_start(ap, fmt);
 807     error1(s1, 0, fmt, ap);
 808     va_end(ap);
 809     /* better than nothing: in some cases, we accept to handle errors */
 810     if (s1->error_set_jmp_enabled) {
 811         longjmp(s1->error_jmp_buf, 1);
 812     } else {
 813         /* XXX: eliminate this someday */
 814         exit(1);
 815     }
 816 }
 817
 818 PUB_FUNC void tcc_warning(const char *fmt, ...)
 819 {
 820     TCCState *s1 = tcc_state;
 821     va_list ap;
 822
 823     if (s1->warn_none)
 824         return;
 825
 826     va_start(ap, fmt);
 827     error1(s1, 1, fmt, ap);
 828     va_end(ap);
 829 }
 830
 831 /********************************************************/
 832 /* I/O layer */
 833
 834 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 835 {
 836     BufferedFile *bf;
 837     int buflen = initlen ? initlen : IO_BUF_SIZE;
 838
 839     bf = tcc_mallocz(sizeof(BufferedFile) + buflen);
 840     bf->buf_ptr = bf->buffer;
 841     bf->buf_end = bf->buffer + initlen;
 842     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 843     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 844 #ifdef _WIN32
 845     normalize_slashes(bf->filename);
 846 #endif
 847     bf->line_num = 1;
 848     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 849     bf->fd = -1;
 850     bf->prev = file;
 851     file = bf;
 852 }
 853
 854 ST_FUNC void tcc_close(void)
 855 {
 856     BufferedFile *bf = file;
 857     if (bf->fd > 0) {
 858         close(bf->fd);
 859         total_lines += bf->line_num;
 860     }
 861     file = bf->prev;
 862     tcc_free(bf);
 863 }
 864
 865 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
 866 {
 867     int fd;
 868     if (strcmp(filename, "-") == 0)
 869         fd = 0, filename = "<stdin>";
 870     else
 871         fd = open(filename, O_RDONLY | O_BINARY);
 872     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 873         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 874                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 875     if (fd < 0)
 876         return -1;
 877
 878     tcc_open_bf(s1, filename, 0);
 879     file->fd = fd;
 880     return fd;
 881 }
 882
 883 /* compile the C file opened in 'file'. Return non zero if errors. */
 884 static int tcc_compile(TCCState *s1)
 885 {
 886     Sym *define_start;
 887     char buf[512];
 888     volatile int section_sym;
 889
 890 #ifdef INC_DEBUG
 891     printf("%s: **** new file\n", file->filename);
 892 #endif
 893     preprocess_init(s1);
 894
 895     cur_text_section = NULL;
 896     funcname = "";
 897     anon_sym = SYM_FIRST_ANOM;
 898
 899     /* file info: full path + filename */
 900     section_sym = 0; /* avoid warning */
 901     if (s1->do_debug) {
 902         section_sym = put_elf_sym(symtab_section, 0, 0,
 903                                   ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
 904                                   text_section->sh_num, NULL);
 905         getcwd(buf, sizeof(buf));
 906 #ifdef _WIN32
 907         normalize_slashes(buf);
 908 #endif
 909         pstrcat(buf, sizeof(buf), "/");
 910         put_stabs_r(buf, N_SO, 0, 0,
 911                     text_section->data_offset, text_section, section_sym);
 912         put_stabs_r(file->filename, N_SO, 0, 0,
 913                     text_section->data_offset, text_section, section_sym);
 914     }
 915     /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
 916        symbols can be safely used */
 917     put_elf_sym(symtab_section, 0, 0,
 918                 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
 919                 SHN_ABS, file->filename);
 920
 921     /* define some often used types */
 922     int_type.t = VT_INT;
 923
 924     char_pointer_type.t = VT_BYTE;
 925     mk_pointer(&char_pointer_type);
 926
 927 #if PTR_SIZE == 4
 928     size_type.t = VT_INT;
 929 #else
 930     size_type.t = VT_LLONG;
 931 #endif
 932
 933     func_old_type.t = VT_FUNC;
 934     func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
 935 #ifdef TCC_TARGET_ARM
 936     arm_init(s1);
 937 #endif
 938
 939 #if 0
 940     /* define 'void *alloca(unsigned int)' builtin function */
 941     {
 942         Sym *s1;
 943
 944         p = anon_sym++;
 945         sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
 946         s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
 947         s1->next = NULL;
 948         sym->next = s1;
 949         sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
 950     }
 951 #endif
 952
 953     define_start = define_stack;
 954     nocode_wanted = 1;
 955
 956     if (setjmp(s1->error_jmp_buf) == 0) {
 957         s1->nb_errors = 0;
 958         s1->error_set_jmp_enabled = 1;
 959
 960         ch = file->buf_ptr[0];
 961         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 962         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM | PARSE_FLAG_TOK_STR;
 963         next();
 964         decl(VT_CONST);
 965         if (tok != TOK_EOF)
 966             expect("declaration");
 967         check_vstack();
 968
 969         /* end of translation unit info */
 970         if (s1->do_debug) {
 971             put_stabs_r(NULL, N_SO, 0, 0,
 972                         text_section->data_offset, text_section, section_sym);
 973         }
 974     }
 975
 976     s1->error_set_jmp_enabled = 0;
 977
 978     /* reset define stack, but leave -Dsymbols (may be incorrect if
 979        they are undefined) */
 980     free_defines(define_start);
 981
 982     gen_inline_functions();
 983
 984     sym_pop(&global_stack, NULL);
 985     sym_pop(&local_stack, NULL);
 986
 987     return s1->nb_errors != 0 ? -1 : 0;
 988 }
 989
 990 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 991 {
 992     int len, ret;
 993
 994     len = strlen(str);
 995     tcc_open_bf(s, "<string>", len);
 996     memcpy(file->buffer, str, len);
 997     ret = tcc_compile(s);
 998     tcc_close();
 999     return ret;
1000 }
1001
1002 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
1003 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
1004 {
1005     int len1, len2;
1006     /* default value */
1007     if (!value)
1008         value = "1";
1009     len1 = strlen(sym);
1010     len2 = strlen(value);
1011
1012     /* init file structure */
1013     tcc_open_bf(s1, "<define>", len1 + len2 + 1);
1014     memcpy(file->buffer, sym, len1);
1015     file->buffer[len1] = ' ';
1016     memcpy(file->buffer + len1 + 1, value, len2);
1017
1018     /* parse with define parser */
1019     ch = file->buf_ptr[0];
1020     next_nomacro();
1021     parse_define();
1022
1023     tcc_close();
1024 }
1025
1026 /* undefine a preprocessor symbol */
1027 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
1028 {
1029     TokenSym *ts;
1030     Sym *s;
1031     ts = tok_alloc(sym, strlen(sym));
1032     s = define_find(ts->tok);
1033     /* undefine symbol by putting an invalid name */
1034     if (s)
1035         define_undef(s);
1036 }
1037
1038 /* cleanup all static data used during compilation */
1039 static void tcc_cleanup(void)
1040 {
1041     if (NULL == tcc_state)
1042         return;
1043     tcc_state = NULL;
1044
1045     preprocess_delete();
1046
1047     /* free sym_pools */
1048     dynarray_reset(&sym_pools, &nb_sym_pools);
1049     /* reset symbol stack */
1050     sym_free_first = NULL;
1051 }
1052
1053 LIBTCCAPI TCCState *tcc_new(void)
1054 {
1055     TCCState *s;
1056     char buffer[100];
1057     int a,b,c;
1058
1059     tcc_cleanup();
1060
1061     s = tcc_mallocz(sizeof(TCCState));
1062     if (!s)
1063         return NULL;
1064     tcc_state = s;
1065 #ifdef _WIN32
1066     tcc_set_lib_path_w32(s);
1067 #else
1068     tcc_set_lib_path(s, CONFIG_TCCDIR);
1069 #endif
1070     s->output_type = 0;
1071     preprocess_new();
1072     s->include_stack_ptr = s->include_stack;
1073
1074     /* we add dummy defines for some special macros to speed up tests
1075        and to have working defined() */
1076     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
1077     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
1078     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
1079     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
1080
1081     /* define __TINYC__ 92X  */
1082     sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
1083     sprintf(buffer, "%d", a*10000 + b*100 + c);
1084     tcc_define_symbol(s, "__TINYC__", buffer);
1085
1086     /* standard defines */
1087     tcc_define_symbol(s, "__STDC__", NULL);
1088     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
1089     tcc_define_symbol(s, "__STDC_HOSTED__", NULL);
1090
1091     /* target defines */
1092 #if defined(TCC_TARGET_I386)
1093     tcc_define_symbol(s, "__i386__", NULL);
1094     tcc_define_symbol(s, "__i386", NULL);
1095     tcc_define_symbol(s, "i386", NULL);
1096 #elif defined(TCC_TARGET_X86_64)
1097     tcc_define_symbol(s, "__x86_64__", NULL);
1098 #elif defined(TCC_TARGET_ARM)
1099     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
1100     tcc_define_symbol(s, "__arm_elf__", NULL);
1101     tcc_define_symbol(s, "__arm_elf", NULL);
1102     tcc_define_symbol(s, "arm_elf", NULL);
1103     tcc_define_symbol(s, "__arm__", NULL);
1104     tcc_define_symbol(s, "__arm", NULL);
1105     tcc_define_symbol(s, "arm", NULL);
1106     tcc_define_symbol(s, "__APCS_32__", NULL);
1107     tcc_define_symbol(s, "__ARMEL__", NULL);
1108 #if defined(TCC_ARM_EABI)
1109     tcc_define_symbol(s, "__ARM_EABI__", NULL);
1110 #endif
1111 #if defined(TCC_ARM_HARDFLOAT)
1112     s->float_abi = ARM_HARD_FLOAT;
1113     tcc_define_symbol(s, "__ARM_PCS_VFP", NULL);
1114 #else
1115     s->float_abi = ARM_SOFTFP_FLOAT;
1116 #endif
1117 #elif defined(TCC_TARGET_ARM64)
1118     tcc_define_symbol(s, "__aarch64__", NULL);
1119 #endif
1120
1121 #ifdef TCC_TARGET_PE
1122     tcc_define_symbol(s, "_WIN32", NULL);
1123 # ifdef TCC_TARGET_X86_64
1124     tcc_define_symbol(s, "_WIN64", NULL);
1125     /* Those are defined by Visual Studio */
1126     tcc_define_symbol(s, "_M_X64", "100");
1127     tcc_define_symbol(s, "_M_AMD64", "100");
1128 # else
1129     /* Defined by Visual Studio. 300 == 80386. */
1130     tcc_define_symbol(s, "_M_IX86", "300");
1131 # endif
1132 #else
1133     tcc_define_symbol(s, "__unix__", NULL);
1134     tcc_define_symbol(s, "__unix", NULL);
1135     tcc_define_symbol(s, "unix", NULL);
1136 # if defined(__linux__)
1137     tcc_define_symbol(s, "__linux__", NULL);
1138     tcc_define_symbol(s, "__linux", NULL);
1139 # endif
1140 # if defined(__FreeBSD__)
1141     tcc_define_symbol(s, "__FreeBSD__", "__FreeBSD__");
1142 # endif
1143 # if defined(__FreeBSD_kernel__)
1144     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
1145 # endif
1146 #endif
1147 # if defined(__NetBSD__)
1148     tcc_define_symbol(s, "__NetBSD__", "__NetBSD__");
1149 # endif
1150
1151     /* TinyCC & gcc defines */
1152 #if defined(TCC_TARGET_PE) && defined(TCC_TARGET_X86_64)
1153     /* 64bit Windows. */
1154     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
1155     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
1156     tcc_define_symbol(s, "__LLP64__", NULL);
1157 #elif defined(TCC_TARGET_X86_64) || defined(TCC_TARGET_ARM64)
1158     /* Other 64bit systems. */
1159     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
1160     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
1161     tcc_define_symbol(s, "__LP64__", NULL);
1162 #else
1163     /* Other 32bit systems. */
1164     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
1165     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
1166     tcc_define_symbol(s, "__ILP32__", NULL);
1167 #endif
1168
1169 #ifdef TCC_TARGET_PE
1170     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
1171     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned short");
1172 #else
1173     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
1174     /* wint_t is unsigned int by default, but (signed) int on BSDs
1175        and unsigned short on windows.  Other OSes might have still
1176        other conventions, sigh.  */
1177 #if defined(__FreeBSD__) || defined (__FreeBSD_kernel__) || defined(__NetBSD__)
1178     tcc_define_symbol(s, "__WINT_TYPE__", "int");
1179 #else
1180     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned int");
1181 #endif
1182 #endif
1183
1184 #ifndef TCC_TARGET_PE
1185     /* glibc defines */
1186     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)", "name proto __asm__ (#alias)");
1187     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)", "name proto __asm__ (#alias) __THROW");
1188     /* paths for crt objects */
1189     tcc_split_path(s, (void ***)&s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
1190 #endif
1191
1192     /* no section zero */
1193     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
1194
1195     /* create standard sections */
1196     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
1197     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
1198     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
1199
1200     /* symbols are always generated for linking stage */
1201     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
1202                                 ".strtab",
1203                                 ".hashtab", SHF_PRIVATE);
1204     strtab_section = symtab_section->link;
1205     s->symtab = symtab_section;
1206
1207     /* private symbol table for dynamic symbols */
1208     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
1209                                       ".dynstrtab",
1210                                       ".dynhashtab", SHF_PRIVATE);
1211     s->alacarte_link = 1;
1212     s->nocommon = 1;
1213     s->warn_implicit_function_declaration = 1;
1214
1215 #ifdef CHAR_IS_UNSIGNED
1216     s->char_is_unsigned = 1;
1217 #endif
1218     /* enable this if you want symbols with leading underscore on windows: */
1219 #if 0 /* def TCC_TARGET_PE */
1220     s->leading_underscore = 1;
1221 #endif
1222 #ifdef TCC_TARGET_I386
1223     s->seg_size = 32;
1224 #endif
1225 #ifdef TCC_IS_NATIVE
1226     s->runtime_main = "main";
1227 #endif
1228     return s;
1229 }
1230
1231 LIBTCCAPI void tcc_delete(TCCState *s1)
1232 {
1233     int i;
1234     int bench = s1->do_bench;
1235
1236     tcc_cleanup();
1237
1238     /* close a preprocessor output */
1239     if (s1->ppfp && s1->ppfp != stdout)
1240         fclose(s1->ppfp);
1241
1242     /* free all sections */
1243     for(i = 1; i < s1->nb_sections; i++)
1244         free_section(s1->sections[i]);
1245     dynarray_reset(&s1->sections, &s1->nb_sections);
1246
1247     for(i = 0; i < s1->nb_priv_sections; i++)
1248         free_section(s1->priv_sections[i]);
1249     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1250
1251     /* free any loaded DLLs */
1252 #ifdef TCC_IS_NATIVE
1253     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1254         DLLReference *ref = s1->loaded_dlls[i];
1255         if ( ref->handle )
1256             dlclose(ref->handle);
1257     }
1258 #endif
1259
1260     /* free loaded dlls array */
1261     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1262
1263     /* free library paths */
1264     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1265     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
1266
1267     /* free include paths */
1268     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1269     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1270     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1271
1272     tcc_free(s1->tcc_lib_path);
1273     tcc_free(s1->soname);
1274     tcc_free(s1->rpath);
1275     tcc_free(s1->init_symbol);
1276     tcc_free(s1->fini_symbol);
1277     tcc_free(s1->outfile);
1278     tcc_free(s1->deps_outfile);
1279     dynarray_reset(&s1->files, &s1->nb_files);
1280     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
1281     dynarray_reset(&s1->pragma_libs, &s1->nb_pragma_libs);
1282
1283 #ifdef TCC_IS_NATIVE
1284 # ifdef HAVE_SELINUX
1285     munmap (s1->write_mem, s1->mem_size);
1286     munmap (s1->runtime_mem, s1->mem_size);
1287 # else
1288     tcc_free(s1->runtime_mem);
1289 # endif
1290 #endif
1291
1292     tcc_free(s1->sym_attrs);
1293     tcc_free(s1);
1294     tcc_memstats(bench);
1295 }
1296
1297 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
1298 {
1299     tcc_split_path(s, (void ***)&s->include_paths, &s->nb_include_paths, pathname);
1300     return 0;
1301 }
1302
1303 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
1304 {
1305     tcc_split_path(s, (void ***)&s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
1306     return 0;
1307 }
1308
1309 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags, int filetype)
1310 {
1311     ElfW(Ehdr) ehdr;
1312     int fd, ret, size;
1313
1314     parse_flags = 0;
1315 #ifdef CONFIG_TCC_ASM
1316     /* if .S file, define __ASSEMBLER__ like gcc does */
1317     if ((filetype == TCC_FILETYPE_ASM) || (filetype == TCC_FILETYPE_ASM_PP)) {
1318         tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
1319         parse_flags = PARSE_FLAG_ASM_FILE;
1320     }
1321 #endif
1322
1323     /* open the file */
1324     ret = tcc_open(s1, filename);
1325     if (ret < 0) {
1326         if (flags & AFF_PRINT_ERROR)
1327             tcc_error_noabort("file '%s' not found", filename);
1328         return ret;
1329     }
1330
1331     /* update target deps */
1332     dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1333             tcc_strdup(filename));
1334
1335     if (flags & AFF_PREPROCESS) {
1336         ret = tcc_preprocess(s1);
1337         goto the_end;
1338     }
1339
1340     if (filetype == TCC_FILETYPE_C) {
1341         /* C file assumed */
1342         ret = tcc_compile(s1);
1343         goto the_end;
1344     }
1345
1346 #ifdef CONFIG_TCC_ASM
1347     if (filetype == TCC_FILETYPE_ASM_PP) {
1348         /* non preprocessed assembler */
1349         ret = tcc_assemble(s1, 1);
1350         goto the_end;
1351     }
1352
1353     if (filetype == TCC_FILETYPE_ASM) {
1354         /* preprocessed assembler */
1355         ret = tcc_assemble(s1, 0);
1356         goto the_end;
1357     }
1358 #endif
1359
1360     fd = file->fd;
1361     /* assume executable format: auto guess file type */
1362     size = read(fd, &ehdr, sizeof(ehdr));
1363     lseek(fd, 0, SEEK_SET);
1364     if (size <= 0) {
1365         tcc_error_noabort("could not read header");
1366         goto the_end;
1367     }
1368
1369     if (size == sizeof(ehdr) &&
1370         ehdr.e_ident[0] == ELFMAG0 &&
1371         ehdr.e_ident[1] == ELFMAG1 &&
1372         ehdr.e_ident[2] == ELFMAG2 &&
1373         ehdr.e_ident[3] == ELFMAG3) {
1374
1375         /* do not display line number if error */
1376         file->line_num = 0;
1377         if (ehdr.e_type == ET_REL) {
1378             ret = tcc_load_object_file(s1, fd, 0);
1379             goto the_end;
1380
1381         }
1382 #ifndef TCC_TARGET_PE
1383         if (ehdr.e_type == ET_DYN) {
1384             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1385 #ifdef TCC_IS_NATIVE
1386                 void *h;
1387                 h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1388                 if (h)
1389 #endif
1390                     ret = 0;
1391             } else {
1392                 ret = tcc_load_dll(s1, fd, filename,
1393                                    (flags & AFF_REFERENCED_DLL) != 0);
1394             }
1395             goto the_end;
1396         }
1397 #endif
1398         tcc_error_noabort("unrecognized ELF file");
1399         goto the_end;
1400     }
1401
1402     if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
1403         file->line_num = 0; /* do not display line number if error */
1404         ret = tcc_load_archive(s1, fd);
1405         goto the_end;
1406     }
1407
1408 #ifdef TCC_TARGET_COFF
1409     if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
1410         ret = tcc_load_coff(s1, fd);
1411         goto the_end;
1412     }
1413 #endif
1414
1415 #ifdef TCC_TARGET_PE
1416     ret = pe_load_file(s1, filename, fd);
1417 #else
1418     /* as GNU ld, consider it is an ld script if not recognized */
1419     ret = tcc_load_ldscript(s1);
1420 #endif
1421     if (ret < 0)
1422         tcc_error_noabort("%s: unrecognized file type (error=%d)", filename, ret);
1423
1424 the_end:
1425     if (s1->verbose)
1426         printf("+> %s\n", filename);
1427     tcc_close();
1428     return ret;
1429 }
1430
1431 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename, int filetype)
1432 {
1433     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1434         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS, filetype);
1435     else
1436         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR, filetype);
1437 }
1438
1439 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1440 {
1441     tcc_split_path(s, (void ***)&s->library_paths, &s->nb_library_paths, pathname);
1442     return 0;
1443 }
1444
1445 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1446     const char *filename, int flags, char **paths, int nb_paths)
1447 {
1448     char buf[1024];
1449     int i;
1450
1451     for(i = 0; i < nb_paths; i++) {
1452         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1453         if (tcc_add_file_internal(s, buf, flags, TCC_FILETYPE_BINARY) == 0)
1454             return 0;
1455     }
1456     return -1;
1457 }
1458
1459 #ifndef TCC_TARGET_PE
1460 /* find and load a dll. Return non zero if not found */
1461 /* XXX: add '-rpath' option support ? */
1462 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1463 {
1464     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1465         s->library_paths, s->nb_library_paths);
1466 }
1467 #endif
1468
1469 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename)
1470 {
1471     if (-1 == tcc_add_library_internal(s, "%s/%s",
1472         filename, 0, s->crt_paths, s->nb_crt_paths))
1473         tcc_error_noabort("file '%s' not found", filename);
1474     return 0;
1475 }
1476
1477 /* the library name is the same as the argument of the '-l' option */
1478 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1479 {
1480 #ifdef TCC_TARGET_PE
1481     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1482     const char **pp = s->static_link ? libs + 4 : libs;
1483 #else
1484     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1485     const char **pp = s->static_link ? libs + 1 : libs;
1486 #endif
1487     while (*pp) {
1488         if (0 == tcc_add_library_internal(s, *pp,
1489             libraryname, 0, s->library_paths, s->nb_library_paths))
1490             return 0;
1491         ++pp;
1492     }
1493     return -1;
1494 }
1495
1496 PUB_FUNC int tcc_add_library_err(TCCState *s, const char *libname)
1497 {
1498     int ret = tcc_add_library(s, libname);
1499     if (ret < 0)
1500         tcc_error_noabort("cannot find library 'lib%s'", libname);
1501     return ret;
1502 }
1503
1504 /* habdle #pragma comment(lib,) */
1505 ST_FUNC void tcc_add_pragma_libs(TCCState *s1)
1506 {
1507     int i;
1508     for (i = 0; i < s1->nb_pragma_libs; i++)
1509         tcc_add_library_err(s1, s1->pragma_libs[i]);
1510 }
1511
1512 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1513 {
1514 #ifdef TCC_TARGET_PE
1515     /* On x86_64 'val' might not be reachable with a 32bit offset.
1516        So it is handled here as if it were in a DLL. */
1517     pe_putimport(s, 0, name, (uintptr_t)val);
1518 #else
1519     add_elf_sym(symtab_section, (uintptr_t)val, 0,
1520         ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1521         SHN_ABS, name);
1522 #endif
1523     return 0;
1524 }
1525
1526
1527 /* Windows stat* ( https://msdn.microsoft.com/en-us/library/14h5k7ff.aspx ):
1528  * - st_gid, st_ino, st_uid: only valid on "unix" file systems (not FAT, NTFS, etc)
1529  * - st_atime, st_ctime: not valid on FAT, valid on NTFS.
1530  * - Other fields should be reasonably compatible (and S_ISDIR should work).
1531  *
1532  * BY_HANDLE_FILE_INFORMATION ( https://msdn.microsoft.com/en-us/library/windows/desktop/aa363788%28v=vs.85%29.aspx ):
1533  * - File index (combined nFileIndexHigh and nFileIndexLow) _may_ change when the file is opened.
1534  *   - But on NTFS: it's guaranteed to be the same value until the file is deleted.
1535  * - On windows server 2012 there's a 128b file id, and the 64b one via
1536  *   nFileIndex* is not guaranteed to be unique.
1537  *
1538  * - MS Docs suggest to that volume number with the file index could be used to
1539  *   check if two handles refer to the same file.
1540  */
1541 #ifndef _WIN32
1542 typedef struct stat                file_info_t;
1543 #else
1544 typedef BY_HANDLE_FILE_INFORMATION file_info_t;
1545 #endif
1546
1547 static  int get_file_info(const char *fname, file_info_t *out_info)
1548 {
1549 #ifndef _WIN32
1550     return stat(fname, out_info);
1551 #else
1552     int rv = 1;
1553     HANDLE h = CreateFile(fname, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,
1554                           FILE_ATTRIBUTE_NORMAL|FILE_FLAG_BACKUP_SEMANTICS, NULL);
1555
1556     if (h != INVALID_HANDLE_VALUE) {
1557         rv = !GetFileInformationByHandle(h, out_info);
1558         CloseHandle(h);
1559     }
1560     return rv;
1561 #endif
1562 }
1563
1564 static int is_dir(file_info_t *info)
1565 {
1566 #ifndef _WIN32
1567     return S_ISDIR(info->st_mode);
1568 #else
1569     return (info->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ==
1570            FILE_ATTRIBUTE_DIRECTORY;
1571 #endif
1572 }
1573
1574 static int is_same_file(const file_info_t *fi1, const file_info_t *fi2)
1575 {
1576 #ifndef _WIN32
1577     return fi1->st_dev == fi2->st_dev &&
1578            fi1->st_ino == fi2->st_ino;
1579 #else
1580     return fi1->dwVolumeSerialNumber == fi2->dwVolumeSerialNumber &&
1581            fi1->nFileIndexHigh       == fi2->nFileIndexHigh &&
1582            fi1->nFileIndexLow        == fi2->nFileIndexLow;
1583 #endif
1584 }
1585
1586 static void
1587 tcc_normalize_inc_dirs_aux(file_info_t *stats, size_t *pnum, char **path)
1588 {
1589     size_t i, num = *pnum;
1590     if (get_file_info(*path, &stats[num]) || !is_dir(&stats[num]))
1591         goto remove;
1592     for (i = 0; i < num; i++)
1593         if (is_same_file(&stats[i], &stats[num]))
1594             goto remove;
1595     *pnum = num + 1;
1596     return;
1597  remove:
1598     tcc_free(*path);
1599     *path = 0;
1600 }
1601
1602 /* Remove non-existent and duplicate directories from include paths. */
1603 ST_FUNC void tcc_normalize_inc_dirs(TCCState *s)
1604 {
1605     file_info_t *stats =
1606         tcc_malloc(((size_t)s->nb_sysinclude_paths + s->nb_include_paths) *
1607                    sizeof(*stats));
1608     size_t i, num = 0;
1609     for (i = 0; i < s->nb_sysinclude_paths; i++)
1610         tcc_normalize_inc_dirs_aux(stats, &num, &s->sysinclude_paths[i]);
1611     for (i = 0; i < s->nb_include_paths; i++)
1612         tcc_normalize_inc_dirs_aux(stats, &num, &s->include_paths[i]);
1613     tcc_free(stats);
1614 }
1615
1616 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
1617 {
1618     s->output_type = output_type;
1619
1620     if (s->output_type == TCC_OUTPUT_PREPROCESS) {
1621         if (!s->outfile) {
1622             s->ppfp = stdout;
1623         } else {
1624             s->ppfp = fopen(s->outfile, "w");
1625             if (!s->ppfp)
1626                 tcc_error("could not write '%s'", s->outfile);
1627         }
1628     }
1629
1630     if (!s->nostdinc) {
1631         /* default include paths */
1632         /* -isystem paths have already been handled */
1633         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
1634     }
1635
1636     /* if bound checking, then add corresponding sections */
1637 #ifdef CONFIG_TCC_BCHECK
1638     if (s->do_bounds_check) {
1639         /* define symbol */
1640         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1641         /* create bounds sections */
1642         bounds_section = new_section(s, ".bounds",
1643                                      SHT_PROGBITS, SHF_ALLOC);
1644         lbounds_section = new_section(s, ".lbounds",
1645                                       SHT_PROGBITS, SHF_ALLOC);
1646     }
1647 #endif
1648
1649     if (s->char_is_unsigned) {
1650         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
1651     }
1652
1653     /* add debug sections */
1654     if (s->do_debug) {
1655         /* stab symbols */
1656         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
1657         stab_section->sh_entsize = sizeof(Stab_Sym);
1658         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
1659         put_elf_str(stabstr_section, "");
1660         stab_section->link = stabstr_section;
1661         /* put first entry */
1662         put_stabs("", 0, 0, 0, 0);
1663     }
1664
1665     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
1666 #ifdef TCC_TARGET_PE
1667 # ifdef _WIN32
1668     tcc_add_systemdir(s);
1669 # endif
1670 #else
1671     /* add libc crt1/crti objects */
1672     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1673         !s->nostdlib) {
1674         if (output_type != TCC_OUTPUT_DLL)
1675             tcc_add_crt(s, "crt1.o");
1676         tcc_add_crt(s, "crti.o");
1677     }
1678 #endif
1679 #ifdef CONFIG_TCC_BCHECK
1680     if (s->do_bounds_check && (output_type == TCC_OUTPUT_EXE))
1681     {
1682         /* force a bcheck.o linking */
1683         addr_t func = TOK___bound_init;
1684         Sym *sym = external_global_sym(func, &func_old_type, 0);
1685         if (!sym->c)
1686             put_extern_sym(sym, NULL, 0, 0);
1687     }
1688 #endif
1689     if (s->normalize_inc_dirs)
1690         tcc_normalize_inc_dirs(s);
1691     return 0;
1692 }
1693
1694 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1695 {
1696     tcc_free(s->tcc_lib_path);
1697     s->tcc_lib_path = tcc_strdup(path);
1698 }
1699
1700 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1701 #define FD_INVERT 0x0002 /* invert value before storing */
1702
1703 typedef struct FlagDef {
1704     uint16_t offset;
1705     uint16_t flags;
1706     const char *name;
1707 } FlagDef;
1708
1709 static const FlagDef warning_defs[] = {
1710     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1711     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1712     { offsetof(TCCState, warn_error), 0, "error" },
1713     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1714       "implicit-function-declaration" },
1715 };
1716
1717 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1718                     const char *name, int value)
1719 {
1720     int i;
1721     const FlagDef *p;
1722     const char *r;
1723
1724     r = name;
1725     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
1726         r += 3;
1727         value = !value;
1728     }
1729     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1730         if (!strcmp(r, p->name))
1731             goto found;
1732     }
1733     return -1;
1734  found:
1735     if (p->flags & FD_INVERT)
1736         value = !value;
1737     *(int *)((uint8_t *)s + p->offset) = value;
1738     return 0;
1739 }
1740
1741 /* set/reset a warning */
1742 static int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1743 {
1744     int i;
1745     const FlagDef *p;
1746
1747     if (!strcmp(warning_name, "all")) {
1748         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1749             if (p->flags & WD_ALL)
1750                 *(int *)((uint8_t *)s + p->offset) = 1;
1751         }
1752         return 0;
1753     } else {
1754         return set_flag(s, warning_defs, countof(warning_defs),
1755                         warning_name, value);
1756     }
1757 }
1758
1759 static const FlagDef flag_defs[] = {
1760     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1761     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1762     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1763     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1764     { offsetof(TCCState, ms_extensions), 0, "ms-extensions" },
1765     { offsetof(TCCState, old_struct_init_code), 0, "old-struct-init-code" },
1766     { offsetof(TCCState, dollars_in_identifiers), 0, "dollars-in-identifiers" },
1767     { offsetof(TCCState, normalize_inc_dirs), 0, "normalize-inc-dirs" },
1768 };
1769
1770 /* set/reset a flag */
1771 static int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1772 {
1773     return set_flag(s, flag_defs, countof(flag_defs),
1774                     flag_name, value);
1775 }
1776
1777
1778 static int strstart(const char *val, const char **str)
1779 {
1780     const char *p, *q;
1781     p = *str;
1782     q = val;
1783     while (*q) {
1784         if (*p != *q)
1785             return 0;
1786         p++;
1787         q++;
1788     }
1789     *str = p;
1790     return 1;
1791 }
1792
1793 /* Like strstart, but automatically takes into account that ld options can
1794  *
1795  * - start with double or single dash (e.g. '--soname' or '-soname')
1796  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1797  *   or '-Wl,-soname=x.so')
1798  *
1799  * you provide `val` always in 'option[=]' form (no leading -)
1800  */
1801 static int link_option(const char *str, const char *val, const char **ptr)
1802 {
1803     const char *p, *q;
1804
1805     /* there should be 1 or 2 dashes */
1806     if (*str++ != '-')
1807         return 0;
1808     if (*str == '-')
1809         str++;
1810
1811     /* then str & val should match (potentialy up to '=') */
1812     p = str;
1813     q = val;
1814
1815     while (*q != '\0' && *q != '=') {
1816         if (*p != *q)
1817             return 0;
1818         p++;
1819         q++;
1820     }
1821
1822     /* '=' near eos means ',' or '=' is ok */
1823     if (*q == '=') {
1824         if (*p != ',' && *p != '=')
1825             return 0;
1826         p++;
1827         q++;
1828     }
1829
1830     if (ptr)
1831         *ptr = p;
1832     return 1;
1833 }
1834
1835 static const char *skip_linker_arg(const char **str)
1836 {
1837     const char *s1 = *str;
1838     const char *s2 = strchr(s1, ',');
1839     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1840     return s2;
1841 }
1842
1843 static char *copy_linker_arg(const char *p)
1844 {
1845     const char *q = p;
1846     skip_linker_arg(&q);
1847     return pstrncpy(tcc_malloc(q - p + 1), p, q - p);
1848 }
1849
1850 /* set linker options */
1851 static int tcc_set_linker(TCCState *s, const char *option)
1852 {
1853     while (option && *option) {
1854
1855         const char *p = option;
1856         char *end = NULL;
1857         int ignoring = 0;
1858
1859         if (link_option(option, "Bsymbolic", &p)) {
1860             s->symbolic = 1;
1861         } else if (link_option(option, "nostdlib", &p)) {
1862             s->nostdlib = 1;
1863         } else if (link_option(option, "fini=", &p)) {
1864             s->fini_symbol = copy_linker_arg(p);
1865             ignoring = 1;
1866         } else if (link_option(option, "image-base=", &p)
1867                 || link_option(option, "Ttext=", &p)) {
1868             s->text_addr = strtoull(p, &end, 16);
1869             s->has_text_addr = 1;
1870         } else if (link_option(option, "init=", &p)) {
1871             s->init_symbol = copy_linker_arg(p);
1872             ignoring = 1;
1873         } else if (link_option(option, "oformat=", &p)) {
1874 #if defined(TCC_TARGET_PE)
1875             if (strstart("pe-", &p)) {
1876 #elif defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1877             if (strstart("elf64-", &p)) {
1878 #else
1879             if (strstart("elf32-", &p)) {
1880 #endif
1881                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1882             } else if (!strcmp(p, "binary")) {
1883                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1884 #ifdef TCC_TARGET_COFF
1885             } else if (!strcmp(p, "coff")) {
1886                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1887 #endif
1888             } else
1889                 goto err;
1890
1891         } else if (link_option(option, "as-needed", &p)) {
1892             ignoring = 1;
1893         } else if (link_option(option, "O", &p)) {
1894             ignoring = 1;
1895         } else if (link_option(option, "rpath=", &p)) {
1896             s->rpath = copy_linker_arg(p);
1897         } else if (link_option(option, "section-alignment=", &p)) {
1898             s->section_align = strtoul(p, &end, 16);
1899         } else if (link_option(option, "soname=", &p)) {
1900             s->soname = copy_linker_arg(p);
1901 #ifdef TCC_TARGET_PE
1902         } else if (link_option(option, "file-alignment=", &p)) {
1903             s->pe_file_align = strtoul(p, &end, 16);
1904         } else if (link_option(option, "stack=", &p)) {
1905             s->pe_stack_size = strtoul(p, &end, 10);
1906         } else if (link_option(option, "subsystem=", &p)) {
1907 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1908             if (!strcmp(p, "native")) {
1909                 s->pe_subsystem = 1;
1910             } else if (!strcmp(p, "console")) {
1911                 s->pe_subsystem = 3;
1912             } else if (!strcmp(p, "gui")) {
1913                 s->pe_subsystem = 2;
1914             } else if (!strcmp(p, "posix")) {
1915                 s->pe_subsystem = 7;
1916             } else if (!strcmp(p, "efiapp")) {
1917                 s->pe_subsystem = 10;
1918             } else if (!strcmp(p, "efiboot")) {
1919                 s->pe_subsystem = 11;
1920             } else if (!strcmp(p, "efiruntime")) {
1921                 s->pe_subsystem = 12;
1922             } else if (!strcmp(p, "efirom")) {
1923                 s->pe_subsystem = 13;
1924 #elif defined(TCC_TARGET_ARM)
1925             if (!strcmp(p, "wince")) {
1926                 s->pe_subsystem = 9;
1927 #endif
1928             } else
1929                 goto err;
1930 #endif
1931         } else
1932             goto err;
1933
1934         if (ignoring && s->warn_unsupported) err: {
1935             char buf[100], *e;
1936             pstrcpy(buf, sizeof buf, e = copy_linker_arg(option)), tcc_free(e);
1937             if (ignoring)
1938                 tcc_warning("unsupported linker option '%s'", buf);
1939             else
1940                 tcc_error("unsupported linker option '%s'", buf);
1941         }
1942         option = skip_linker_arg(&p);
1943     }
1944     return 0;
1945 }
1946
1947 typedef struct TCCOption {
1948     const char *name;
1949     uint16_t index;
1950     uint16_t flags;
1951 } TCCOption;
1952
1953 enum {
1954     TCC_OPTION_HELP,
1955     TCC_OPTION_I,
1956     TCC_OPTION_D,
1957     TCC_OPTION_U,
1958     TCC_OPTION_P,
1959     TCC_OPTION_L,
1960     TCC_OPTION_B,
1961     TCC_OPTION_l,
1962     TCC_OPTION_bench,
1963     TCC_OPTION_bt,
1964     TCC_OPTION_b,
1965     TCC_OPTION_g,
1966     TCC_OPTION_c,
1967     TCC_OPTION_dumpversion,
1968     TCC_OPTION_d,
1969     TCC_OPTION_float_abi,
1970     TCC_OPTION_static,
1971     TCC_OPTION_std,
1972     TCC_OPTION_shared,
1973     TCC_OPTION_soname,
1974     TCC_OPTION_o,
1975     TCC_OPTION_r,
1976     TCC_OPTION_s,
1977     TCC_OPTION_traditional,
1978     TCC_OPTION_Wl,
1979     TCC_OPTION_W,
1980     TCC_OPTION_O,
1981     TCC_OPTION_m,
1982     TCC_OPTION_f,
1983     TCC_OPTION_isystem,
1984     TCC_OPTION_iwithprefix,
1985     TCC_OPTION_nostdinc,
1986     TCC_OPTION_nostdlib,
1987     TCC_OPTION_print_search_dirs,
1988     TCC_OPTION_rdynamic,
1989     TCC_OPTION_pedantic,
1990     TCC_OPTION_pthread,
1991     TCC_OPTION_run,
1992     TCC_OPTION_v,
1993     TCC_OPTION_w,
1994     TCC_OPTION_pipe,
1995     TCC_OPTION_E,
1996     TCC_OPTION_MD,
1997     TCC_OPTION_MF,
1998     TCC_OPTION_x
1999 };
2000
2001 #define TCC_OPTION_HAS_ARG 0x0001
2002 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
2003
2004 static const TCCOption tcc_options[] = {
2005     { "h", TCC_OPTION_HELP, 0 },
2006     { "-help", TCC_OPTION_HELP, 0 },
2007     { "?", TCC_OPTION_HELP, 0 },
2008     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
2009     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
2010     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
2011     { "P", TCC_OPTION_P, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2012     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
2013     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
2014     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2015     { "bench", TCC_OPTION_bench, 0 },
2016 #ifdef CONFIG_TCC_BACKTRACE
2017     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
2018 #endif
2019 #ifdef CONFIG_TCC_BCHECK
2020     { "b", TCC_OPTION_b, 0 },
2021 #endif
2022     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2023     { "c", TCC_OPTION_c, 0 },
2024     { "dumpversion", TCC_OPTION_dumpversion, 0},
2025     { "d", TCC_OPTION_d, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2026 #ifdef TCC_TARGET_ARM
2027     { "mfloat-abi", TCC_OPTION_float_abi, TCC_OPTION_HAS_ARG },
2028 #endif
2029     { "static", TCC_OPTION_static, 0 },
2030     { "std", TCC_OPTION_std, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2031     { "shared", TCC_OPTION_shared, 0 },
2032     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
2033     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
2034     { "pedantic", TCC_OPTION_pedantic, 0},
2035     { "pthread", TCC_OPTION_pthread, 0},
2036     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2037     { "rdynamic", TCC_OPTION_rdynamic, 0 },
2038     { "r", TCC_OPTION_r, 0 },
2039     { "s", TCC_OPTION_s, 0 },
2040     { "traditional", TCC_OPTION_traditional, 0 },
2041     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2042     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2043     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2044     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG },
2045     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2046     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
2047     { "iwithprefix", TCC_OPTION_iwithprefix, TCC_OPTION_HAS_ARG },
2048     { "nostdinc", TCC_OPTION_nostdinc, 0 },
2049     { "nostdlib", TCC_OPTION_nostdlib, 0 },
2050     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
2051     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2052     { "w", TCC_OPTION_w, 0 },
2053     { "pipe", TCC_OPTION_pipe, 0},
2054     { "E", TCC_OPTION_E, 0},
2055     { "MD", TCC_OPTION_MD, 0},
2056     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
2057     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
2058     { NULL, 0, 0 },
2059 };
2060
2061 static void parse_option_D(TCCState *s1, const char *optarg)
2062 {
2063     char *sym = tcc_strdup(optarg);
2064     char *value = strchr(sym, '=');
2065     if (value)
2066         *value++ = '\0';
2067     tcc_define_symbol(s1, sym, value);
2068     tcc_free(sym);
2069 }
2070
2071 static void args_parser_add_file(TCCState *s, const char* filename, int filetype)
2072 {
2073     int len = strlen(filename);
2074     char *p = tcc_malloc(len + 2);
2075     if (filetype) {
2076         *p = filetype;
2077     }
2078     else {
2079         /* use a file extension to detect a filetype */
2080         const char *ext = tcc_fileextension(filename);
2081         if (ext[0]) {
2082             ext++;
2083             if (!strcmp(ext, "S"))
2084                 *p = TCC_FILETYPE_ASM_PP;
2085             else
2086             if (!strcmp(ext, "s"))
2087                 *p = TCC_FILETYPE_ASM;
2088             else
2089             if (!PATHCMP(ext, "c") || !PATHCMP(ext, "i"))
2090                 *p = TCC_FILETYPE_C;
2091             else
2092                 *p = TCC_FILETYPE_BINARY;
2093         }
2094         else {
2095             *p = TCC_FILETYPE_C;
2096         }
2097     }
2098     strcpy(p+1, filename);
2099     dynarray_add((void ***)&s->files, &s->nb_files, p);
2100 }
2101
2102 ST_FUNC int tcc_parse_args1(TCCState *s, int argc, char **argv)
2103 {
2104     const TCCOption *popt;
2105     const char *optarg, *r;
2106     int optind = 0;
2107     ParseArgsState *pas = s->parse_args_state;
2108
2109     while (optind < argc) {
2110
2111         r = argv[optind++];
2112         if (r[0] != '-' || r[1] == '\0') {
2113             /* handle list files */
2114             if (r[0] == '@' && r[1]) {
2115                 char buf[sizeof file->filename], *p;
2116                 char **argv = NULL;
2117                 int argc = 0;
2118                 FILE *fp;
2119
2120                 fp = fopen(r + 1, "rb");
2121                 if (fp == NULL)
2122                     tcc_error("list file '%s' not found", r + 1);
2123                 while (fgets(buf, sizeof buf, fp)) {
2124                     p = trimfront(trimback(buf, strchr(buf, 0)));
2125                     if (0 == *p || ';' == *p)
2126                         continue;
2127                     dynarray_add((void ***)&argv, &argc, tcc_strdup(p));
2128                 }
2129                 fclose(fp);
2130                 tcc_parse_args1(s, argc, argv);
2131                 dynarray_reset(&argv, &argc);
2132             } else {
2133                 args_parser_add_file(s, r, pas->filetype);
2134                 if (pas->run) {
2135                     optind--;
2136                     /* argv[0] will be this file */
2137                     break;
2138                 }
2139             }
2140             continue;
2141         }
2142
2143         /* find option in table */
2144         for(popt = tcc_options; ; ++popt) {
2145             const char *p1 = popt->name;
2146             const char *r1 = r + 1;
2147             if (p1 == NULL)
2148                 tcc_error("invalid option -- '%s'", r);
2149             if (!strstart(p1, &r1))
2150                 continue;
2151             optarg = r1;
2152             if (popt->flags & TCC_OPTION_HAS_ARG) {
2153                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
2154                     if (optind >= argc)
2155                         tcc_error("argument to '%s' is missing", r);
2156                     optarg = argv[optind++];
2157                 }
2158             } else if (*r1 != '\0')
2159                 continue;
2160             break;
2161         }
2162
2163         switch(popt->index) {
2164         case TCC_OPTION_HELP:
2165             return 0;
2166         case TCC_OPTION_I:
2167             tcc_add_include_path(s, optarg);
2168             break;
2169         case TCC_OPTION_D:
2170             parse_option_D(s, optarg);
2171             break;
2172         case TCC_OPTION_U:
2173             tcc_undefine_symbol(s, optarg);
2174             break;
2175         case TCC_OPTION_L:
2176             tcc_add_library_path(s, optarg);
2177             break;
2178         case TCC_OPTION_B:
2179             /* set tcc utilities path (mainly for tcc development) */
2180             tcc_set_lib_path(s, optarg);
2181             break;
2182         case TCC_OPTION_l:
2183             args_parser_add_file(s, r, TCC_FILETYPE_BINARY);
2184             s->nb_libraries++;
2185             break;
2186         case TCC_OPTION_pthread:
2187             parse_option_D(s, "_REENTRANT");
2188             pas->pthread = 1;
2189             break;
2190         case TCC_OPTION_bench:
2191             s->do_bench = 1;
2192             break;
2193 #ifdef CONFIG_TCC_BACKTRACE
2194         case TCC_OPTION_bt:
2195             tcc_set_num_callers(atoi(optarg));
2196             break;
2197 #endif
2198 #ifdef CONFIG_TCC_BCHECK
2199         case TCC_OPTION_b:
2200             s->do_bounds_check = 1;
2201             s->do_debug = 1;
2202             break;
2203 #endif
2204         case TCC_OPTION_g:
2205             s->do_debug = 1;
2206             break;
2207         case TCC_OPTION_c:
2208             if (s->output_type)
2209                 tcc_warning("-c: some compiler action already specified (%d)", s->output_type);
2210             s->output_type = TCC_OUTPUT_OBJ;
2211             break;
2212         case TCC_OPTION_d:
2213             if (*optarg == 'D')
2214                 s->dflag = 3;
2215             else if (*optarg == 'M')
2216                 s->dflag = 7;
2217             else if (*optarg == 'b')
2218                 s->dflag = 8;
2219             else
2220                 goto unsupported_option;
2221             break;
2222 #ifdef TCC_TARGET_ARM
2223         case TCC_OPTION_float_abi:
2224             /* tcc doesn't support soft float yet */
2225             if (!strcmp(optarg, "softfp")) {
2226                 s->float_abi = ARM_SOFTFP_FLOAT;
2227                 tcc_undefine_symbol(s, "__ARM_PCS_VFP");
2228             } else if (!strcmp(optarg, "hard"))
2229                 s->float_abi = ARM_HARD_FLOAT;
2230             else
2231                 tcc_error("unsupported float abi '%s'", optarg);
2232             break;
2233 #endif
2234         case TCC_OPTION_static:
2235             s->static_link = 1;
2236             break;
2237         case TCC_OPTION_std:
2238             /* silently ignore, a current purpose:
2239                allow to use a tcc as a reference compiler for "make test" */
2240             break;
2241         case TCC_OPTION_shared:
2242             if (s->output_type)
2243                 tcc_warning("-shared: some compiler action already specified (%d)", s->output_type);
2244             s->output_type = TCC_OUTPUT_DLL;
2245             break;
2246         case TCC_OPTION_soname:
2247             s->soname = tcc_strdup(optarg);
2248             break;
2249         case TCC_OPTION_m:
2250             s->option_m = tcc_strdup(optarg);
2251             break;
2252         case TCC_OPTION_o:
2253             if (s->outfile) {
2254                 tcc_warning("multiple -o option");
2255                 tcc_free(s->outfile);
2256             }
2257             s->outfile = tcc_strdup(optarg);
2258             break;
2259         case TCC_OPTION_r:
2260             /* generate a .o merging several output files */
2261             if (s->output_type)
2262                 tcc_warning("-r: some compiler action already specified (%d)", s->output_type);
2263             s->option_r = 1;
2264             s->output_type = TCC_OUTPUT_OBJ;
2265             break;
2266         case TCC_OPTION_isystem:
2267             tcc_add_sysinclude_path(s, optarg);
2268             break;
2269         case TCC_OPTION_iwithprefix:
2270             if (1) {
2271                 char buf[1024];
2272                 int buf_size = sizeof(buf)-1;
2273                 char *p = &buf[0];
2274
2275                 char *sysroot = "{B}/";
2276                 int len = strlen(sysroot);
2277                 if (len > buf_size)
2278                     len = buf_size;
2279                 strncpy(p, sysroot, len);
2280                 p += len;
2281                 buf_size -= len;
2282
2283                 len = strlen(optarg);
2284                 if (len > buf_size)
2285                     len = buf_size;
2286                 strncpy(p, optarg, len+1);
2287                 tcc_add_sysinclude_path(s, buf);
2288             }
2289             break;
2290         case TCC_OPTION_nostdinc:
2291             s->nostdinc = 1;
2292             break;
2293         case TCC_OPTION_nostdlib:
2294             s->nostdlib = 1;
2295             break;
2296         case TCC_OPTION_print_search_dirs:
2297             s->print_search_dirs = 1;
2298             break;
2299         case TCC_OPTION_run:
2300             if (s->output_type)
2301                 tcc_warning("-run: some compiler action already specified (%d)", s->output_type);
2302             s->output_type = TCC_OUTPUT_MEMORY;
2303             tcc_set_options(s, optarg);
2304             pas->run = 1;
2305             break;
2306         case TCC_OPTION_v:
2307             do ++s->verbose; while (*optarg++ == 'v');
2308             break;
2309         case TCC_OPTION_f:
2310             if (tcc_set_flag(s, optarg, 1) < 0)
2311                 goto unsupported_option;
2312             break;
2313         case TCC_OPTION_W:
2314             if (tcc_set_warning(s, optarg, 1) < 0)
2315                 goto unsupported_option;
2316             break;
2317         case TCC_OPTION_w:
2318             s->warn_none = 1;
2319             break;
2320         case TCC_OPTION_rdynamic:
2321             s->rdynamic = 1;
2322             break;
2323         case TCC_OPTION_Wl:
2324             if (optarg && *optarg == '-') {
2325                 int offs = 0;
2326                 if (!strncmp("-no", optarg+1, 3))
2327                     offs += 3;
2328                 if (!strcmp("-whole-archive", optarg+1 + offs)) {
2329                     args_parser_add_file(s, "", (offs == 0) ? TCC_FILETYPE_AR_WHOLE_ON :
2330                         TCC_FILETYPE_AR_WHOLE_OFF);
2331                     break;
2332                 }
2333             }
2334             if (pas->linker_arg.size)
2335                 --pas->linker_arg.size, cstr_ccat(&pas->linker_arg, ',');
2336             cstr_cat(&pas->linker_arg, optarg, 0);
2337             break;
2338         case TCC_OPTION_E:
2339             if (s->output_type)
2340                 tcc_warning("-E: some compiler action already specified (%d)", s->output_type);
2341             s->output_type = TCC_OUTPUT_PREPROCESS;
2342             break;
2343         case TCC_OPTION_P:
2344             s->Pflag = atoi(optarg) + 1;
2345             break;
2346         case TCC_OPTION_MD:
2347             s->gen_deps = 1;
2348             break;
2349         case TCC_OPTION_MF:
2350             s->deps_outfile = tcc_strdup(optarg);
2351             break;
2352         case TCC_OPTION_dumpversion:
2353             printf ("%s\n", TCC_VERSION);
2354             exit(0);
2355         case TCC_OPTION_s:
2356             s->do_strip = 1;
2357             break;
2358         case TCC_OPTION_traditional:
2359             break;
2360         case TCC_OPTION_x:
2361             if (*optarg == 'c')
2362                 pas->filetype = TCC_FILETYPE_C;
2363             else
2364             if (*optarg == 'a')
2365                 pas->filetype = TCC_FILETYPE_ASM_PP;
2366             else
2367             if (*optarg == 'n')
2368                 pas->filetype = 0;
2369             else
2370                 tcc_warning("unsupported language '%s'", optarg);
2371             break;
2372         case TCC_OPTION_O:
2373             if (1) {
2374                 int opt = atoi(optarg);
2375                 char *sym = "__OPTIMIZE__";
2376                 if (opt)
2377                     tcc_define_symbol(s, sym, 0);
2378                 else
2379                     tcc_undefine_symbol(s, sym);
2380             }
2381             break;
2382         case TCC_OPTION_pedantic:
2383         case TCC_OPTION_pipe:
2384             /* ignored */
2385             break;
2386         default:
2387 unsupported_option:
2388             if (s->warn_unsupported)
2389                 tcc_warning("unsupported option '%s'", r);
2390             break;
2391         }
2392     }
2393     return optind;
2394 }
2395
2396 PUB_FUNC int tcc_parse_args(TCCState *s, int argc, char **argv)
2397 {
2398     ParseArgsState *pas;
2399     int ret, is_allocated = 0;
2400
2401     if (!s->parse_args_state) {
2402         s->parse_args_state = tcc_mallocz(sizeof(ParseArgsState));
2403         cstr_new(&s->parse_args_state->linker_arg);
2404         is_allocated = 1;
2405     }
2406     pas = s->parse_args_state;
2407
2408     ret = tcc_parse_args1(s, argc, argv);
2409
2410     if (s->output_type == 0)
2411         s->output_type = TCC_OUTPUT_EXE;
2412
2413     if (pas->pthread && s->output_type != TCC_OUTPUT_OBJ)
2414         tcc_set_options(s, "-lpthread");
2415
2416     if (s->output_type == TCC_OUTPUT_EXE)
2417         tcc_set_linker(s, (const char *)pas->linker_arg.data);
2418
2419     if (is_allocated) {
2420         cstr_free(&pas->linker_arg);
2421         tcc_free(pas);
2422         s->parse_args_state = NULL;
2423     }
2424     return ret;
2425 }
2426
2427 LIBTCCAPI int tcc_set_options(TCCState *s, const char *str)
2428 {
2429     const char *s1;
2430     char **argv, *arg;
2431     int argc, len;
2432     int ret;
2433
2434     argc = 0, argv = NULL;
2435     for(;;) {
2436         while (is_space(*str))
2437             str++;
2438         if (*str == '\0')
2439             break;
2440         s1 = str;
2441         while (*str != '\0' && !is_space(*str))
2442             str++;
2443         len = str - s1;
2444         arg = tcc_malloc(len + 1);
2445         pstrncpy(arg, s1, len);
2446         dynarray_add((void ***)&argv, &argc, arg);
2447     }
2448     ret = tcc_parse_args(s, argc, argv);
2449     dynarray_reset(&argv, &argc);
2450     return ret;
2451 }
2452
2453 PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time)
2454 {
2455     double tt;
2456     tt = (double)total_time / 1000000.0;
2457     if (tt < 0.001)
2458         tt = 0.001;
2459     if (total_bytes < 1)
2460         total_bytes = 1;
2461     fprintf(stderr, "%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
2462            tok_ident - TOK_IDENT, total_lines, total_bytes,
2463            tt, (int)(total_lines / tt),
2464            total_bytes / tt / 1000000.0);
2465 }
2466
2467 PUB_FUNC void tcc_set_environment(TCCState *s)
2468 {
2469     char * path;
2470
2471     path = getenv("C_INCLUDE_PATH");
2472     if(path != NULL) {
2473         tcc_add_include_path(s, path);
2474     }
2475     path = getenv("CPATH");
2476     if(path != NULL) {
2477         tcc_add_include_path(s, path);
2478     }
2479     path = getenv("LIBRARY_PATH");
2480     if(path != NULL) {
2481         tcc_add_library_path(s, path);
2482     }
2483 }