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 PUB_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 PUB_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 PUB_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         gen_inline_functions();
 968         check_vstack();
 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     /* reset define stack, but keep -D and built-ins */
 978     free_defines(define_start);
 979     sym_pop(&global_stack, NULL);
 980     sym_pop(&local_stack, NULL);
 981     return s1->nb_errors != 0 ? -1 : 0;
 982 }
 983
 984 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 985 {
 986     int len, ret;
 987
 988     len = strlen(str);
 989     tcc_open_bf(s, "<string>", len);
 990     memcpy(file->buffer, str, len);
 991     ret = tcc_compile(s);
 992     tcc_close();
 993     return ret;
 994 }
 995
 996 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
 997 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 998 {
 999     int len1, len2;
1000     /* default value */
1001     if (!value)
1002         value = "1";
1003     len1 = strlen(sym);
1004     len2 = strlen(value);
1005
1006     /* init file structure */
1007     tcc_open_bf(s1, "<define>", len1 + len2 + 1);
1008     memcpy(file->buffer, sym, len1);
1009     file->buffer[len1] = ' ';
1010     memcpy(file->buffer + len1 + 1, value, len2);
1011
1012     /* parse with define parser */
1013     ch = file->buf_ptr[0];
1014     next_nomacro();
1015     parse_define();
1016
1017     tcc_close();
1018 }
1019
1020 /* undefine a preprocessor symbol */
1021 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
1022 {
1023     TokenSym *ts;
1024     Sym *s;
1025     ts = tok_alloc(sym, strlen(sym));
1026     s = define_find(ts->tok);
1027     /* undefine symbol by putting an invalid name */
1028     if (s)
1029         define_undef(s);
1030 }
1031
1032 /* cleanup all static data used during compilation */
1033 static void tcc_cleanup(void)
1034 {
1035     if (NULL == tcc_state)
1036         return;
1037     tcc_state = NULL;
1038
1039     preprocess_delete();
1040
1041     /* free sym_pools */
1042     dynarray_reset(&sym_pools, &nb_sym_pools);
1043     /* reset symbol stack */
1044     sym_free_first = NULL;
1045 }
1046
1047 LIBTCCAPI TCCState *tcc_new(void)
1048 {
1049     TCCState *s;
1050     char buffer[100];
1051     int a,b,c;
1052
1053     tcc_cleanup();
1054
1055     s = tcc_mallocz(sizeof(TCCState));
1056     if (!s)
1057         return NULL;
1058     tcc_state = s;
1059 #ifdef _WIN32
1060     tcc_set_lib_path_w32(s);
1061 #else
1062     tcc_set_lib_path(s, CONFIG_TCCDIR);
1063 #endif
1064
1065     preprocess_new();
1066     s->include_stack_ptr = s->include_stack;
1067
1068     /* we add dummy defines for some special macros to speed up tests
1069        and to have working defined() */
1070     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
1071     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
1072     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
1073     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
1074
1075     /* define __TINYC__ 92X  */
1076     sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
1077     sprintf(buffer, "%d", a*10000 + b*100 + c);
1078     tcc_define_symbol(s, "__TINYC__", buffer);
1079
1080     /* standard defines */
1081     tcc_define_symbol(s, "__STDC__", NULL);
1082     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
1083     tcc_define_symbol(s, "__STDC_HOSTED__", NULL);
1084
1085     /* target defines */
1086 #if defined(TCC_TARGET_I386)
1087     tcc_define_symbol(s, "__i386__", NULL);
1088     tcc_define_symbol(s, "__i386", NULL);
1089     tcc_define_symbol(s, "i386", NULL);
1090 #elif defined(TCC_TARGET_X86_64)
1091     tcc_define_symbol(s, "__x86_64__", NULL);
1092 #elif defined(TCC_TARGET_ARM)
1093     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
1094     tcc_define_symbol(s, "__arm_elf__", NULL);
1095     tcc_define_symbol(s, "__arm_elf", NULL);
1096     tcc_define_symbol(s, "arm_elf", NULL);
1097     tcc_define_symbol(s, "__arm__", NULL);
1098     tcc_define_symbol(s, "__arm", NULL);
1099     tcc_define_symbol(s, "arm", NULL);
1100     tcc_define_symbol(s, "__APCS_32__", NULL);
1101     tcc_define_symbol(s, "__ARMEL__", NULL);
1102 #if defined(TCC_ARM_EABI)
1103     tcc_define_symbol(s, "__ARM_EABI__", NULL);
1104 #endif
1105 #if defined(TCC_ARM_HARDFLOAT)
1106     s->float_abi = ARM_HARD_FLOAT;
1107     tcc_define_symbol(s, "__ARM_PCS_VFP", NULL);
1108 #else
1109     s->float_abi = ARM_SOFTFP_FLOAT;
1110 #endif
1111 #elif defined(TCC_TARGET_ARM64)
1112     tcc_define_symbol(s, "__aarch64__", NULL);
1113 #endif
1114
1115 #ifdef TCC_TARGET_PE
1116     tcc_define_symbol(s, "_WIN32", NULL);
1117 # ifdef TCC_TARGET_X86_64
1118     tcc_define_symbol(s, "_WIN64", NULL);
1119     /* Those are defined by Visual Studio */
1120     tcc_define_symbol(s, "_M_X64", "100");
1121     tcc_define_symbol(s, "_M_AMD64", "100");
1122 # else
1123     /* Defined by Visual Studio. 300 == 80386. */
1124     tcc_define_symbol(s, "_M_IX86", "300");
1125 # endif
1126 #else
1127     tcc_define_symbol(s, "__unix__", NULL);
1128     tcc_define_symbol(s, "__unix", NULL);
1129     tcc_define_symbol(s, "unix", NULL);
1130 # if defined(__linux__)
1131     tcc_define_symbol(s, "__linux__", NULL);
1132     tcc_define_symbol(s, "__linux", NULL);
1133 # endif
1134 # if defined(__FreeBSD__)
1135     tcc_define_symbol(s, "__FreeBSD__", "__FreeBSD__");
1136 # endif
1137 # if defined(__FreeBSD_kernel__)
1138     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
1139 # endif
1140 #endif
1141 # if defined(__NetBSD__)
1142     tcc_define_symbol(s, "__NetBSD__", "__NetBSD__");
1143 # endif
1144
1145     /* TinyCC & gcc defines */
1146 #if defined(TCC_TARGET_PE) && defined(TCC_TARGET_X86_64)
1147     /* 64bit Windows. */
1148     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
1149     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
1150     tcc_define_symbol(s, "__LLP64__", NULL);
1151 #elif defined(TCC_TARGET_X86_64) || defined(TCC_TARGET_ARM64)
1152     /* Other 64bit systems. */
1153     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
1154     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
1155     tcc_define_symbol(s, "__LP64__", NULL);
1156 #else
1157     /* Other 32bit systems. */
1158     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
1159     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
1160     tcc_define_symbol(s, "__ILP32__", NULL);
1161 #endif
1162
1163 #ifdef TCC_TARGET_PE
1164     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
1165     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned short");
1166 #else
1167     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
1168     /* wint_t is unsigned int by default, but (signed) int on BSDs
1169        and unsigned short on windows.  Other OSes might have still
1170        other conventions, sigh.  */
1171 #if defined(__FreeBSD__) || defined (__FreeBSD_kernel__) || defined(__NetBSD__)
1172     tcc_define_symbol(s, "__WINT_TYPE__", "int");
1173 #else
1174     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned int");
1175 #endif
1176 #endif
1177
1178 #ifndef TCC_TARGET_PE
1179     /* glibc defines */
1180     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)", "name proto __asm__ (#alias)");
1181     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)", "name proto __asm__ (#alias) __THROW");
1182     /* paths for crt objects */
1183     tcc_split_path(s, (void ***)&s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
1184 #endif
1185
1186     /* no section zero */
1187     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
1188
1189     /* create standard sections */
1190     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
1191     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
1192     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
1193
1194     /* symbols are always generated for linking stage */
1195     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
1196                                 ".strtab",
1197                                 ".hashtab", SHF_PRIVATE);
1198     strtab_section = symtab_section->link;
1199     s->symtab = symtab_section;
1200
1201     /* private symbol table for dynamic symbols */
1202     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
1203                                       ".dynstrtab",
1204                                       ".dynhashtab", SHF_PRIVATE);
1205     s->alacarte_link = 1;
1206     s->nocommon = 1;
1207     s->warn_implicit_function_declaration = 1;
1208
1209 #ifdef CHAR_IS_UNSIGNED
1210     s->char_is_unsigned = 1;
1211 #endif
1212     /* enable this if you want symbols with leading underscore on windows: */
1213 #if 0 /* def TCC_TARGET_PE */
1214     s->leading_underscore = 1;
1215 #endif
1216 #ifdef TCC_TARGET_I386
1217     s->seg_size = 32;
1218 #endif
1219 #ifdef TCC_IS_NATIVE
1220     s->runtime_main = "main";
1221 #endif
1222     return s;
1223 }
1224
1225 LIBTCCAPI void tcc_delete(TCCState *s1)
1226 {
1227     int i;
1228     int bench = s1->do_bench;
1229
1230     tcc_cleanup();
1231
1232     /* free all sections */
1233     for(i = 1; i < s1->nb_sections; i++)
1234         free_section(s1->sections[i]);
1235     dynarray_reset(&s1->sections, &s1->nb_sections);
1236
1237     for(i = 0; i < s1->nb_priv_sections; i++)
1238         free_section(s1->priv_sections[i]);
1239     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1240
1241     /* free any loaded DLLs */
1242 #ifdef TCC_IS_NATIVE
1243     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1244         DLLReference *ref = s1->loaded_dlls[i];
1245         if ( ref->handle )
1246             dlclose(ref->handle);
1247     }
1248 #endif
1249
1250     /* free loaded dlls array */
1251     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1252
1253     /* free library paths */
1254     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1255     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
1256
1257     /* free include paths */
1258     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1259     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1260     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1261
1262     tcc_free(s1->tcc_lib_path);
1263     tcc_free(s1->soname);
1264     tcc_free(s1->rpath);
1265     tcc_free(s1->init_symbol);
1266     tcc_free(s1->fini_symbol);
1267     tcc_free(s1->outfile);
1268     tcc_free(s1->deps_outfile);
1269     dynarray_reset(&s1->files, &s1->nb_files);
1270     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
1271     dynarray_reset(&s1->pragma_libs, &s1->nb_pragma_libs);
1272
1273 #ifdef TCC_IS_NATIVE
1274 # ifdef HAVE_SELINUX
1275     munmap (s1->write_mem, s1->mem_size);
1276     munmap (s1->runtime_mem, s1->mem_size);
1277 # else
1278     tcc_free(s1->runtime_mem);
1279 # endif
1280 #endif
1281
1282     tcc_free(s1->sym_attrs);
1283     tcc_free(s1);
1284     tcc_memstats(bench);
1285 }
1286
1287 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
1288 {
1289     tcc_split_path(s, (void ***)&s->include_paths, &s->nb_include_paths, pathname);
1290     return 0;
1291 }
1292
1293 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
1294 {
1295     tcc_split_path(s, (void ***)&s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
1296     return 0;
1297 }
1298
1299 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1300 {
1301     int ret, filetype;
1302
1303     filetype = flags & 0x0F;
1304     if (filetype == 0) {
1305         /* use a file extension to detect a filetype */
1306         const char *ext = tcc_fileextension(filename);
1307         if (ext[0]) {
1308             ext++;
1309             if (!strcmp(ext, "S"))
1310                 filetype = AFF_TYPE_ASMPP;
1311             else if (!strcmp(ext, "s"))
1312                 filetype = AFF_TYPE_ASM;
1313             else if (!PATHCMP(ext, "c") || !PATHCMP(ext, "i"))
1314                 filetype = AFF_TYPE_C;
1315             else
1316                 filetype = AFF_TYPE_BIN;
1317         } else {
1318             filetype = AFF_TYPE_C;
1319         }
1320     }
1321
1322     /* open the file */
1323     ret = tcc_open(s1, filename);
1324     if (ret < 0) {
1325         if (flags & AFF_PRINT_ERROR)
1326             tcc_error_noabort("file '%s' not found", filename);
1327         return ret;
1328     }
1329
1330     /* update target deps */
1331     dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1332             tcc_strdup(filename));
1333
1334     parse_flags = 0;
1335 #ifdef CONFIG_TCC_ASM
1336     /* if .S file, define __ASSEMBLER__ like gcc does */
1337     if (filetype == AFF_TYPE_ASM || filetype == AFF_TYPE_ASMPP) {
1338         tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
1339         parse_flags = PARSE_FLAG_ASM_FILE;
1340     }
1341 #endif
1342
1343     if (flags & AFF_PREPROCESS) {
1344         ret = tcc_preprocess(s1);
1345     } else if (filetype == AFF_TYPE_C) {
1346         ret = tcc_compile(s1);
1347 #ifdef CONFIG_TCC_ASM
1348     } else if (filetype == AFF_TYPE_ASMPP) {
1349         /* non preprocessed assembler */
1350         ret = tcc_assemble(s1, 1);
1351     } else if (filetype == AFF_TYPE_ASM) {
1352         /* preprocessed assembler */
1353         ret = tcc_assemble(s1, 0);
1354 #endif
1355     } else {
1356         ElfW(Ehdr) ehdr;
1357         int fd, obj_type;
1358
1359         fd = file->fd;
1360         obj_type = tcc_object_type(fd, &ehdr);
1361         lseek(fd, 0, SEEK_SET);
1362
1363         /* do not display line number if error */
1364         file->line_num = 0;
1365
1366         switch (obj_type) {
1367         case AFF_BINTYPE_REL:
1368             ret = tcc_load_object_file(s1, fd, 0);
1369             break;
1370 #ifndef TCC_TARGET_PE
1371         case AFF_BINTYPE_DYN:
1372             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1373                 ret = 0;
1374 #ifdef TCC_IS_NATIVE
1375                 if (NULL == dlopen(filename, RTLD_GLOBAL | RTLD_LAZY))
1376                     ret = -1;
1377 #endif
1378             } else {
1379                 ret = tcc_load_dll(s1, fd, filename,
1380                                    (flags & AFF_REFERENCED_DLL) != 0);
1381             }
1382             break;
1383 #endif
1384         case AFF_BINTYPE_AR:
1385             ret = tcc_load_archive(s1, fd);
1386             break;
1387 #ifdef TCC_TARGET_COFF
1388         case AFF_BINTYPE_C67:
1389             ret = tcc_load_coff(s1, fd);
1390             break;
1391 #endif
1392         default:
1393 #ifdef TCC_TARGET_PE
1394             ret = pe_load_file(s1, filename, fd);
1395 #else
1396             /* as GNU ld, consider it is an ld script if not recognized */
1397             ret = tcc_load_ldscript(s1);
1398 #endif
1399             if (ret < 0)
1400                 tcc_error_noabort("unrecognized file type");
1401             break;
1402         }
1403     }
1404     tcc_close();
1405     return ret;
1406 }
1407
1408 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1409 {
1410     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1411         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS | s->filetype);
1412     else
1413         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | s->filetype);
1414 }
1415
1416 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1417 {
1418     tcc_split_path(s, (void ***)&s->library_paths, &s->nb_library_paths, pathname);
1419     return 0;
1420 }
1421
1422 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1423     const char *filename, int flags, char **paths, int nb_paths)
1424 {
1425     char buf[1024];
1426     int i;
1427
1428     for(i = 0; i < nb_paths; i++) {
1429         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1430         if (tcc_add_file_internal(s, buf, flags | AFF_TYPE_BIN) == 0)
1431             return 0;
1432     }
1433     return -1;
1434 }
1435
1436 #ifndef TCC_TARGET_PE
1437 /* find and load a dll. Return non zero if not found */
1438 /* XXX: add '-rpath' option support ? */
1439 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1440 {
1441     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1442         s->library_paths, s->nb_library_paths);
1443 }
1444 #endif
1445
1446 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename)
1447 {
1448     if (-1 == tcc_add_library_internal(s, "%s/%s",
1449         filename, 0, s->crt_paths, s->nb_crt_paths))
1450         tcc_error_noabort("file '%s' not found", filename);
1451     return 0;
1452 }
1453
1454 /* the library name is the same as the argument of the '-l' option */
1455 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1456 {
1457 #ifdef TCC_TARGET_PE
1458     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1459     const char **pp = s->static_link ? libs + 4 : libs;
1460 #else
1461     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1462     const char **pp = s->static_link ? libs + 1 : libs;
1463 #endif
1464     while (*pp) {
1465         if (0 == tcc_add_library_internal(s, *pp,
1466             libraryname, 0, s->library_paths, s->nb_library_paths))
1467             return 0;
1468         ++pp;
1469     }
1470     return -1;
1471 }
1472
1473 PUB_FUNC int tcc_add_library_err(TCCState *s, const char *libname)
1474 {
1475     int ret = tcc_add_library(s, libname);
1476     if (ret < 0)
1477         tcc_error_noabort("cannot find library 'lib%s'", libname);
1478     return ret;
1479 }
1480
1481 /* habdle #pragma comment(lib,) */
1482 ST_FUNC void tcc_add_pragma_libs(TCCState *s1)
1483 {
1484     int i;
1485     for (i = 0; i < s1->nb_pragma_libs; i++)
1486         tcc_add_library_err(s1, s1->pragma_libs[i]);
1487 }
1488
1489 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1490 {
1491 #ifdef TCC_TARGET_PE
1492     /* On x86_64 'val' might not be reachable with a 32bit offset.
1493        So it is handled here as if it were in a DLL. */
1494     pe_putimport(s, 0, name, (uintptr_t)val);
1495 #else
1496     add_elf_sym(symtab_section, (uintptr_t)val, 0,
1497         ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1498         SHN_ABS, name);
1499 #endif
1500     return 0;
1501 }
1502
1503
1504 /* Windows stat* ( https://msdn.microsoft.com/en-us/library/14h5k7ff.aspx ):
1505  * - st_gid, st_ino, st_uid: only valid on "unix" file systems (not FAT, NTFS, etc)
1506  * - st_atime, st_ctime: not valid on FAT, valid on NTFS.
1507  * - Other fields should be reasonably compatible (and S_ISDIR should work).
1508  *
1509  * BY_HANDLE_FILE_INFORMATION ( https://msdn.microsoft.com/en-us/library/windows/desktop/aa363788%28v=vs.85%29.aspx ):
1510  * - File index (combined nFileIndexHigh and nFileIndexLow) _may_ change when the file is opened.
1511  *   - But on NTFS: it's guaranteed to be the same value until the file is deleted.
1512  * - On windows server 2012 there's a 128b file id, and the 64b one via
1513  *   nFileIndex* is not guaranteed to be unique.
1514  *
1515  * - MS Docs suggest to that volume number with the file index could be used to
1516  *   check if two handles refer to the same file.
1517  */
1518 #ifndef _WIN32
1519 typedef struct stat                file_info_t;
1520 #else
1521 typedef BY_HANDLE_FILE_INFORMATION file_info_t;
1522 #endif
1523
1524 static  int get_file_info(const char *fname, file_info_t *out_info)
1525 {
1526 #ifndef _WIN32
1527     return stat(fname, out_info);
1528 #else
1529     int rv = 1;
1530     HANDLE h = CreateFile(fname, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,
1531                           FILE_ATTRIBUTE_NORMAL|FILE_FLAG_BACKUP_SEMANTICS, NULL);
1532
1533     if (h != INVALID_HANDLE_VALUE) {
1534         rv = !GetFileInformationByHandle(h, out_info);
1535         CloseHandle(h);
1536     }
1537     return rv;
1538 #endif
1539 }
1540
1541 static int is_dir(file_info_t *info)
1542 {
1543 #ifndef _WIN32
1544     return S_ISDIR(info->st_mode);
1545 #else
1546     return (info->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ==
1547            FILE_ATTRIBUTE_DIRECTORY;
1548 #endif
1549 }
1550
1551 static int is_same_file(const file_info_t *fi1, const file_info_t *fi2)
1552 {
1553 #ifndef _WIN32
1554     return fi1->st_dev == fi2->st_dev &&
1555            fi1->st_ino == fi2->st_ino;
1556 #else
1557     return fi1->dwVolumeSerialNumber == fi2->dwVolumeSerialNumber &&
1558            fi1->nFileIndexHigh       == fi2->nFileIndexHigh &&
1559            fi1->nFileIndexLow        == fi2->nFileIndexLow;
1560 #endif
1561 }
1562
1563 static void
1564 tcc_normalize_inc_dirs_aux(file_info_t *stats, size_t *pnum, char **path)
1565 {
1566     size_t i, num = *pnum;
1567     if (get_file_info(*path, &stats[num]) || !is_dir(&stats[num]))
1568         goto remove;
1569     for (i = 0; i < num; i++)
1570         if (is_same_file(&stats[i], &stats[num]))
1571             goto remove;
1572     *pnum = num + 1;
1573     return;
1574  remove:
1575     tcc_free(*path);
1576     *path = 0;
1577 }
1578
1579 /* Remove non-existent and duplicate directories from include paths. */
1580 ST_FUNC void tcc_normalize_inc_dirs(TCCState *s)
1581 {
1582     file_info_t *stats =
1583         tcc_malloc(((size_t)s->nb_sysinclude_paths + s->nb_include_paths) *
1584                    sizeof(*stats));
1585     size_t i, num = 0;
1586     for (i = 0; i < s->nb_sysinclude_paths; i++)
1587         tcc_normalize_inc_dirs_aux(stats, &num, &s->sysinclude_paths[i]);
1588     for (i = 0; i < s->nb_include_paths; i++)
1589         tcc_normalize_inc_dirs_aux(stats, &num, &s->include_paths[i]);
1590     tcc_free(stats);
1591 }
1592
1593 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
1594 {
1595     s->output_type = output_type;
1596
1597     if (!s->nostdinc) {
1598         /* default include paths */
1599         /* -isystem paths have already been handled */
1600         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
1601     }
1602
1603     /* if bound checking, then add corresponding sections */
1604 #ifdef CONFIG_TCC_BCHECK
1605     if (s->do_bounds_check) {
1606         /* define symbol */
1607         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1608         /* create bounds sections */
1609         bounds_section = new_section(s, ".bounds",
1610                                      SHT_PROGBITS, SHF_ALLOC);
1611         lbounds_section = new_section(s, ".lbounds",
1612                                       SHT_PROGBITS, SHF_ALLOC);
1613     }
1614 #endif
1615
1616     if (s->char_is_unsigned) {
1617         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
1618     }
1619
1620     /* add debug sections */
1621     if (s->do_debug) {
1622         /* stab symbols */
1623         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
1624         stab_section->sh_entsize = sizeof(Stab_Sym);
1625         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
1626         put_elf_str(stabstr_section, "");
1627         stab_section->link = stabstr_section;
1628         /* put first entry */
1629         put_stabs("", 0, 0, 0, 0);
1630     }
1631
1632     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
1633 #ifdef TCC_TARGET_PE
1634 # ifdef _WIN32
1635     tcc_add_systemdir(s);
1636 # endif
1637 #else
1638     /* add libc crt1/crti objects */
1639     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1640         !s->nostdlib) {
1641         if (output_type != TCC_OUTPUT_DLL)
1642             tcc_add_crt(s, "crt1.o");
1643         tcc_add_crt(s, "crti.o");
1644     }
1645 #endif
1646     if (s->normalize_inc_dirs)
1647         tcc_normalize_inc_dirs(s);
1648     return 0;
1649 }
1650
1651 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1652 {
1653     tcc_free(s->tcc_lib_path);
1654     s->tcc_lib_path = tcc_strdup(path);
1655 }
1656
1657 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1658 #define FD_INVERT 0x0002 /* invert value before storing */
1659
1660 typedef struct FlagDef {
1661     uint16_t offset;
1662     uint16_t flags;
1663     const char *name;
1664 } FlagDef;
1665
1666 static const FlagDef warning_defs[] = {
1667     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1668     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1669     { offsetof(TCCState, warn_error), 0, "error" },
1670     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1671       "implicit-function-declaration" },
1672 };
1673
1674 static int no_flag(const char **pp)
1675 {
1676     const char *p = *pp;
1677     if (*p != 'n' || *++p != 'o' || *++p != '-')
1678         return 0;
1679     *pp = p + 1;
1680     return 1;
1681 }
1682
1683 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1684                     const char *name, int value)
1685 {
1686     int i;
1687     const FlagDef *p;
1688     const char *r;
1689
1690     r = name;
1691     if (no_flag(&r))
1692         value = !value;
1693
1694     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1695         if (!strcmp(r, p->name))
1696             goto found;
1697     }
1698     return -1;
1699  found:
1700     if (p->flags & FD_INVERT)
1701         value = !value;
1702     *(int *)((uint8_t *)s + p->offset) = value;
1703     return 0;
1704 }
1705
1706 /* set/reset a warning */
1707 static int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1708 {
1709     int i;
1710     const FlagDef *p;
1711
1712     if (!strcmp(warning_name, "all")) {
1713         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1714             if (p->flags & WD_ALL)
1715                 *(int *)((uint8_t *)s + p->offset) = 1;
1716         }
1717         return 0;
1718     } else {
1719         return set_flag(s, warning_defs, countof(warning_defs),
1720                         warning_name, value);
1721     }
1722 }
1723
1724 static const FlagDef flag_defs[] = {
1725     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1726     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1727     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1728     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1729     { offsetof(TCCState, ms_extensions), 0, "ms-extensions" },
1730     { offsetof(TCCState, old_struct_init_code), 0, "old-struct-init-code" },
1731     { offsetof(TCCState, dollars_in_identifiers), 0, "dollars-in-identifiers" },
1732     { offsetof(TCCState, normalize_inc_dirs), 0, "normalize-inc-dirs" },
1733 };
1734
1735 /* set/reset a flag */
1736 static int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1737 {
1738     return set_flag(s, flag_defs, countof(flag_defs),
1739                     flag_name, value);
1740 }
1741
1742
1743 static int strstart(const char *val, const char **str)
1744 {
1745     const char *p, *q;
1746     p = *str;
1747     q = val;
1748     while (*q) {
1749         if (*p != *q)
1750             return 0;
1751         p++;
1752         q++;
1753     }
1754     *str = p;
1755     return 1;
1756 }
1757
1758 /* Like strstart, but automatically takes into account that ld options can
1759  *
1760  * - start with double or single dash (e.g. '--soname' or '-soname')
1761  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1762  *   or '-Wl,-soname=x.so')
1763  *
1764  * you provide `val` always in 'option[=]' form (no leading -)
1765  */
1766 static int link_option(const char *str, const char *val, const char **ptr)
1767 {
1768     const char *p, *q;
1769     int ret;
1770
1771     /* there should be 1 or 2 dashes */
1772     if (*str++ != '-')
1773         return 0;
1774     if (*str == '-')
1775         str++;
1776
1777     /* then str & val should match (potentialy up to '=') */
1778     p = str;
1779     q = val;
1780
1781     ret = 1;
1782     if (q[0] == '?') {
1783         ++q;
1784         if (no_flag(&p))
1785             ret = -1;
1786     }
1787
1788     while (*q != '\0' && *q != '=') {
1789         if (*p != *q)
1790             return 0;
1791         p++;
1792         q++;
1793     }
1794
1795     /* '=' near eos means ',' or '=' is ok */
1796     if (*q == '=') {
1797         if (*p == 0)
1798             *ptr = p;
1799         if (*p != ',' && *p != '=')
1800             return 0;
1801         p++;
1802     }
1803     *ptr = p;
1804     return ret;
1805 }
1806
1807 static const char *skip_linker_arg(const char **str)
1808 {
1809     const char *s1 = *str;
1810     const char *s2 = strchr(s1, ',');
1811     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1812     return s2;
1813 }
1814
1815 static char *copy_linker_arg(const char *p)
1816 {
1817     const char *q = p;
1818     skip_linker_arg(&q);
1819     return pstrncpy(tcc_malloc(q - p + 1), p, q - p);
1820 }
1821
1822 /* set linker options */
1823 static int tcc_set_linker(TCCState *s, const char *option)
1824 {
1825     while (*option) {
1826
1827         const char *p = NULL;
1828         char *end = NULL;
1829         int ignoring = 0;
1830         int ret;
1831
1832         if (link_option(option, "Bsymbolic", &p)) {
1833             s->symbolic = 1;
1834         } else if (link_option(option, "nostdlib", &p)) {
1835             s->nostdlib = 1;
1836         } else if (link_option(option, "fini=", &p)) {
1837             s->fini_symbol = copy_linker_arg(p);
1838             ignoring = 1;
1839         } else if (link_option(option, "image-base=", &p)
1840                 || link_option(option, "Ttext=", &p)) {
1841             s->text_addr = strtoull(p, &end, 16);
1842             s->has_text_addr = 1;
1843         } else if (link_option(option, "init=", &p)) {
1844             s->init_symbol = copy_linker_arg(p);
1845             ignoring = 1;
1846         } else if (link_option(option, "oformat=", &p)) {
1847 #if defined(TCC_TARGET_PE)
1848             if (strstart("pe-", &p)) {
1849 #elif defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1850             if (strstart("elf64-", &p)) {
1851 #else
1852             if (strstart("elf32-", &p)) {
1853 #endif
1854                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1855             } else if (!strcmp(p, "binary")) {
1856                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1857 #ifdef TCC_TARGET_COFF
1858             } else if (!strcmp(p, "coff")) {
1859                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1860 #endif
1861             } else
1862                 goto err;
1863
1864         } else if (link_option(option, "as-needed", &p)) {
1865             ignoring = 1;
1866         } else if (link_option(option, "O", &p)) {
1867             ignoring = 1;
1868         } else if (link_option(option, "rpath=", &p)) {
1869             s->rpath = copy_linker_arg(p);
1870         } else if (link_option(option, "section-alignment=", &p)) {
1871             s->section_align = strtoul(p, &end, 16);
1872         } else if (link_option(option, "soname=", &p)) {
1873             s->soname = copy_linker_arg(p);
1874 #ifdef TCC_TARGET_PE
1875         } else if (link_option(option, "file-alignment=", &p)) {
1876             s->pe_file_align = strtoul(p, &end, 16);
1877         } else if (link_option(option, "stack=", &p)) {
1878             s->pe_stack_size = strtoul(p, &end, 10);
1879         } else if (link_option(option, "subsystem=", &p)) {
1880 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1881             if (!strcmp(p, "native")) {
1882                 s->pe_subsystem = 1;
1883             } else if (!strcmp(p, "console")) {
1884                 s->pe_subsystem = 3;
1885             } else if (!strcmp(p, "gui")) {
1886                 s->pe_subsystem = 2;
1887             } else if (!strcmp(p, "posix")) {
1888                 s->pe_subsystem = 7;
1889             } else if (!strcmp(p, "efiapp")) {
1890                 s->pe_subsystem = 10;
1891             } else if (!strcmp(p, "efiboot")) {
1892                 s->pe_subsystem = 11;
1893             } else if (!strcmp(p, "efiruntime")) {
1894                 s->pe_subsystem = 12;
1895             } else if (!strcmp(p, "efirom")) {
1896                 s->pe_subsystem = 13;
1897 #elif defined(TCC_TARGET_ARM)
1898             if (!strcmp(p, "wince")) {
1899                 s->pe_subsystem = 9;
1900 #endif
1901             } else
1902                 goto err;
1903 #endif
1904         } else if (ret = link_option(option, "?whole-archive", &p), ret) {
1905             s->alacarte_link = ret < 0;
1906         } else if (p) {
1907             return 0;
1908         } else {
1909     err:
1910             tcc_error("unsupported linker option '%s'", option);
1911         }
1912
1913         if (ignoring && s->warn_unsupported)
1914             tcc_warning("unsupported linker option '%s'", option);
1915
1916         option = skip_linker_arg(&p);
1917     }
1918     return 1;
1919 }
1920
1921 typedef struct TCCOption {
1922     const char *name;
1923     uint16_t index;
1924     uint16_t flags;
1925 } TCCOption;
1926
1927 enum {
1928     TCC_OPTION_HELP,
1929     TCC_OPTION_I,
1930     TCC_OPTION_D,
1931     TCC_OPTION_U,
1932     TCC_OPTION_P,
1933     TCC_OPTION_L,
1934     TCC_OPTION_B,
1935     TCC_OPTION_l,
1936     TCC_OPTION_bench,
1937     TCC_OPTION_bt,
1938     TCC_OPTION_b,
1939     TCC_OPTION_g,
1940     TCC_OPTION_c,
1941     TCC_OPTION_dumpversion,
1942     TCC_OPTION_d,
1943     TCC_OPTION_float_abi,
1944     TCC_OPTION_static,
1945     TCC_OPTION_std,
1946     TCC_OPTION_shared,
1947     TCC_OPTION_soname,
1948     TCC_OPTION_o,
1949     TCC_OPTION_r,
1950     TCC_OPTION_s,
1951     TCC_OPTION_traditional,
1952     TCC_OPTION_Wl,
1953     TCC_OPTION_W,
1954     TCC_OPTION_O,
1955     TCC_OPTION_m,
1956     TCC_OPTION_f,
1957     TCC_OPTION_isystem,
1958     TCC_OPTION_iwithprefix,
1959     TCC_OPTION_nostdinc,
1960     TCC_OPTION_nostdlib,
1961     TCC_OPTION_print_search_dirs,
1962     TCC_OPTION_rdynamic,
1963     TCC_OPTION_pedantic,
1964     TCC_OPTION_pthread,
1965     TCC_OPTION_run,
1966     TCC_OPTION_v,
1967     TCC_OPTION_w,
1968     TCC_OPTION_pipe,
1969     TCC_OPTION_E,
1970     TCC_OPTION_MD,
1971     TCC_OPTION_MF,
1972     TCC_OPTION_x
1973 };
1974
1975 #define TCC_OPTION_HAS_ARG 0x0001
1976 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1977
1978 static const TCCOption tcc_options[] = {
1979     { "h", TCC_OPTION_HELP, 0 },
1980     { "-help", TCC_OPTION_HELP, 0 },
1981     { "?", TCC_OPTION_HELP, 0 },
1982     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1983     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1984     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1985     { "P", TCC_OPTION_P, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1986     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1987     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1988     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1989     { "bench", TCC_OPTION_bench, 0 },
1990 #ifdef CONFIG_TCC_BACKTRACE
1991     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
1992 #endif
1993 #ifdef CONFIG_TCC_BCHECK
1994     { "b", TCC_OPTION_b, 0 },
1995 #endif
1996     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1997     { "c", TCC_OPTION_c, 0 },
1998     { "dumpversion", TCC_OPTION_dumpversion, 0},
1999     { "d", TCC_OPTION_d, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2000 #ifdef TCC_TARGET_ARM
2001     { "mfloat-abi", TCC_OPTION_float_abi, TCC_OPTION_HAS_ARG },
2002 #endif
2003     { "static", TCC_OPTION_static, 0 },
2004     { "std", TCC_OPTION_std, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2005     { "shared", TCC_OPTION_shared, 0 },
2006     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
2007     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
2008     { "pedantic", TCC_OPTION_pedantic, 0},
2009     { "pthread", TCC_OPTION_pthread, 0},
2010     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2011     { "rdynamic", TCC_OPTION_rdynamic, 0 },
2012     { "r", TCC_OPTION_r, 0 },
2013     { "s", TCC_OPTION_s, 0 },
2014     { "traditional", TCC_OPTION_traditional, 0 },
2015     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2016     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2017     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2018     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG },
2019     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2020     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
2021     { "iwithprefix", TCC_OPTION_iwithprefix, TCC_OPTION_HAS_ARG },
2022     { "nostdinc", TCC_OPTION_nostdinc, 0 },
2023     { "nostdlib", TCC_OPTION_nostdlib, 0 },
2024     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
2025     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2026     { "w", TCC_OPTION_w, 0 },
2027     { "pipe", TCC_OPTION_pipe, 0},
2028     { "E", TCC_OPTION_E, 0},
2029     { "MD", TCC_OPTION_MD, 0},
2030     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
2031     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
2032     { NULL, 0, 0 },
2033 };
2034
2035 static void parse_option_D(TCCState *s1, const char *optarg)
2036 {
2037     char *sym = tcc_strdup(optarg);
2038     char *value = strchr(sym, '=');
2039     if (value)
2040         *value++ = '\0';
2041     tcc_define_symbol(s1, sym, value);
2042     tcc_free(sym);
2043 }
2044
2045 static void args_parser_add_file(TCCState *s, const char* filename, int filetype)
2046 {
2047     struct filespec *f = tcc_malloc(sizeof *f + strlen(filename));
2048     f->type = filetype;
2049     strcpy(f->name, filename);
2050     dynarray_add((void ***)&s->files, &s->nb_files, f);
2051 }
2052
2053 /* read list file */
2054 static void args_parser_listfile(TCCState *s, const char *filename)
2055 {
2056     int fd;
2057     size_t len;
2058     char *p;
2059
2060     fd = open(filename, O_RDONLY | O_BINARY);
2061     if (fd < 0)
2062         tcc_error("file '%s' not found", filename);
2063
2064     len = lseek(fd, 0, SEEK_END);
2065     p = tcc_malloc(len + 1), p[len] = 0;
2066     lseek(fd, 0, SEEK_SET), read(fd, p, len), close(fd);
2067     tcc_set_options(s, p);
2068     tcc_free(p);
2069 }
2070
2071 PUB_FUNC int tcc_parse_args(TCCState *s, int argc, char **argv)
2072 {
2073     const TCCOption *popt;
2074     const char *optarg, *r;
2075     int optind = 0;
2076     int run = 0;
2077     int x;
2078     CString linker_arg; /* collect -Wl options */
2079     char buf[1024];
2080
2081     cstr_new(&linker_arg);
2082
2083     while (optind < argc) {
2084
2085         r = argv[optind++];
2086
2087         if (r[0] == '@' && r[1] != '\0') {
2088             args_parser_listfile(s, r + 1);
2089             continue;
2090         }
2091
2092         if (r[0] != '-' || r[1] == '\0') {
2093             args_parser_add_file(s, r, s->filetype);
2094             if (run) {
2095                 optind--;
2096                 /* argv[0] will be this file */
2097                 break;
2098             }
2099             continue;
2100         }
2101
2102         /* find option in table */
2103         for(popt = tcc_options; ; ++popt) {
2104             const char *p1 = popt->name;
2105             const char *r1 = r + 1;
2106             if (p1 == NULL)
2107                 tcc_error("invalid option -- '%s'", r);
2108             if (!strstart(p1, &r1))
2109                 continue;
2110             optarg = r1;
2111             if (popt->flags & TCC_OPTION_HAS_ARG) {
2112                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
2113                     if (optind >= argc)
2114                 arg_err:
2115                         tcc_error("argument to '%s' is missing", r);
2116                     optarg = argv[optind++];
2117                 }
2118             } else if (*r1 != '\0')
2119                 continue;
2120             break;
2121         }
2122
2123         switch(popt->index) {
2124         case TCC_OPTION_HELP:
2125             return 0;
2126         case TCC_OPTION_I:
2127             tcc_add_include_path(s, optarg);
2128             break;
2129         case TCC_OPTION_D:
2130             parse_option_D(s, optarg);
2131             break;
2132         case TCC_OPTION_U:
2133             tcc_undefine_symbol(s, optarg);
2134             break;
2135         case TCC_OPTION_L:
2136             tcc_add_library_path(s, optarg);
2137             break;
2138         case TCC_OPTION_B:
2139             /* set tcc utilities path (mainly for tcc development) */
2140             tcc_set_lib_path(s, optarg);
2141             break;
2142         case TCC_OPTION_l:
2143             args_parser_add_file(s, optarg, AFF_TYPE_LIBWH - s->alacarte_link);
2144             s->nb_libraries++;
2145             break;
2146         case TCC_OPTION_pthread:
2147             parse_option_D(s, "_REENTRANT");
2148             s->option_pthread = 1;
2149             break;
2150         case TCC_OPTION_bench:
2151             s->do_bench = 1;
2152             break;
2153 #ifdef CONFIG_TCC_BACKTRACE
2154         case TCC_OPTION_bt:
2155             tcc_set_num_callers(atoi(optarg));
2156             break;
2157 #endif
2158 #ifdef CONFIG_TCC_BCHECK
2159         case TCC_OPTION_b:
2160             s->do_bounds_check = 1;
2161             s->do_debug = 1;
2162             break;
2163 #endif
2164         case TCC_OPTION_g:
2165             s->do_debug = 1;
2166             break;
2167         case TCC_OPTION_c:
2168             x = TCC_OUTPUT_OBJ;
2169         set_output_type:
2170             if (s->output_type)
2171                 tcc_warning("-%s: overriding compiler action already specified", popt->name);
2172             s->output_type = x;
2173             break;
2174         case TCC_OPTION_d:
2175             if (*optarg == 'D')
2176                 s->dflag = 3;
2177             else if (*optarg == 'M')
2178                 s->dflag = 7;
2179             else
2180                 goto unsupported_option;
2181             break;
2182 #ifdef TCC_TARGET_ARM
2183         case TCC_OPTION_float_abi:
2184             /* tcc doesn't support soft float yet */
2185             if (!strcmp(optarg, "softfp")) {
2186                 s->float_abi = ARM_SOFTFP_FLOAT;
2187                 tcc_undefine_symbol(s, "__ARM_PCS_VFP");
2188             } else if (!strcmp(optarg, "hard"))
2189                 s->float_abi = ARM_HARD_FLOAT;
2190             else
2191                 tcc_error("unsupported float abi '%s'", optarg);
2192             break;
2193 #endif
2194         case TCC_OPTION_static:
2195             s->static_link = 1;
2196             break;
2197         case TCC_OPTION_std:
2198             /* silently ignore, a current purpose:
2199                allow to use a tcc as a reference compiler for "make test" */
2200             break;
2201         case TCC_OPTION_shared:
2202             x = TCC_OUTPUT_DLL;
2203             goto set_output_type;
2204         case TCC_OPTION_soname:
2205             s->soname = tcc_strdup(optarg);
2206             break;
2207         case TCC_OPTION_m:
2208             s->option_m = tcc_strdup(optarg);
2209             break;
2210         case TCC_OPTION_o:
2211             if (s->outfile) {
2212                 tcc_warning("multiple -o option");
2213                 tcc_free(s->outfile);
2214             }
2215             s->outfile = tcc_strdup(optarg);
2216             break;
2217         case TCC_OPTION_r:
2218             /* generate a .o merging several output files */
2219             s->option_r = 1;
2220             x = TCC_OUTPUT_OBJ;
2221             goto set_output_type;
2222         case TCC_OPTION_isystem:
2223             tcc_add_sysinclude_path(s, optarg);
2224             break;
2225         case TCC_OPTION_iwithprefix:
2226             snprintf(buf, sizeof buf, "{B}/%s", optarg);
2227             tcc_add_sysinclude_path(s, buf);
2228             break;
2229         case TCC_OPTION_nostdinc:
2230             s->nostdinc = 1;
2231             break;
2232         case TCC_OPTION_nostdlib:
2233             s->nostdlib = 1;
2234             break;
2235         case TCC_OPTION_print_search_dirs:
2236             s->print_search_dirs = 1;
2237             break;
2238         case TCC_OPTION_run:
2239 #ifndef TCC_IS_NATIVE
2240             tcc_error("-run is not available in a cross compiler");
2241 #endif
2242             tcc_set_options(s, optarg);
2243             run = 1;
2244             x = TCC_OUTPUT_MEMORY;
2245             goto set_output_type;
2246         case TCC_OPTION_v:
2247             do ++s->verbose; while (*optarg++ == 'v');
2248             break;
2249         case TCC_OPTION_f:
2250             if (tcc_set_flag(s, optarg, 1) < 0)
2251                 goto unsupported_option;
2252             break;
2253         case TCC_OPTION_W:
2254             if (tcc_set_warning(s, optarg, 1) < 0)
2255                 goto unsupported_option;
2256             break;
2257         case TCC_OPTION_w:
2258             s->warn_none = 1;
2259             break;
2260         case TCC_OPTION_rdynamic:
2261             s->rdynamic = 1;
2262             break;
2263         case TCC_OPTION_Wl:
2264             if (linker_arg.size)
2265                 --linker_arg.size, cstr_ccat(&linker_arg, ',');
2266             cstr_cat(&linker_arg, optarg, 0);
2267             if (tcc_set_linker(s, linker_arg.data))
2268                 cstr_free(&linker_arg);
2269             break;
2270         case TCC_OPTION_E:
2271             x = TCC_OUTPUT_PREPROCESS;
2272             goto set_output_type;
2273         case TCC_OPTION_P:
2274             s->Pflag = atoi(optarg) + 1;
2275             break;
2276         case TCC_OPTION_MD:
2277             s->gen_deps = 1;
2278             break;
2279         case TCC_OPTION_MF:
2280             s->deps_outfile = tcc_strdup(optarg);
2281             break;
2282         case TCC_OPTION_dumpversion:
2283             printf ("%s\n", TCC_VERSION);
2284             exit(0);
2285             break;
2286         case TCC_OPTION_x:
2287             if (*optarg == 'c')
2288                 s->filetype = AFF_TYPE_C;
2289             else if (*optarg == 'a')
2290                 s->filetype = AFF_TYPE_ASMPP;
2291             else if (*optarg == 'n')
2292                 s->filetype = AFF_TYPE_NONE;
2293             else
2294                 tcc_warning("unsupported language '%s'", optarg);
2295             break;
2296         case TCC_OPTION_O:
2297             x = atoi(optarg);
2298             if (x > 0)
2299                 tcc_define_symbol(s, "__OPTIMIZE__", NULL);
2300             break;
2301         case TCC_OPTION_traditional:
2302         case TCC_OPTION_pedantic:
2303         case TCC_OPTION_pipe:
2304         case TCC_OPTION_s:
2305             /* ignored */
2306             break;
2307         default:
2308 unsupported_option:
2309             if (s->warn_unsupported)
2310                 tcc_warning("unsupported option '%s'", r);
2311             break;
2312         }
2313     }
2314
2315     if (linker_arg.size) {
2316         r = linker_arg.data;
2317         goto arg_err;
2318     }
2319
2320     return optind;
2321 }
2322
2323 LIBTCCAPI int tcc_set_options(TCCState *s, const char *r)
2324 {
2325     char **argv;
2326     int argc;
2327     int ret, q, c;
2328     CString str;
2329
2330     argc = 0, argv = NULL;
2331     for(;;) {
2332         while (c = (unsigned char)*r, c && c <= ' ')
2333             ++r;
2334         if (c == 0)
2335             break;
2336         q = 0;
2337         cstr_new(&str);
2338         while (c = (unsigned char)*r, c) {
2339             ++r;
2340             if (c == '\\' && (*r == '"' || *r == '\\')) {
2341                 c = *r++;
2342             } else if (c == '"') {
2343                 q = !q;
2344                 continue;
2345             } else if (q == 0 && c <= ' ') {
2346                 break;
2347             }
2348             cstr_ccat(&str, c);
2349         }
2350         cstr_ccat(&str, 0);
2351         //printf("<%s>\n", str.data), fflush(stdout);
2352         dynarray_add((void ***)&argv, &argc, tcc_strdup(str.data));
2353         cstr_free(&str);
2354     }
2355     ret = tcc_parse_args(s, argc, argv);
2356     dynarray_reset(&argv, &argc);
2357     return ret;
2358 }
2359
2360 PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time)
2361 {
2362     double tt;
2363     tt = (double)total_time / 1000000.0;
2364     if (tt < 0.001)
2365         tt = 0.001;
2366     if (total_bytes < 1)
2367         total_bytes = 1;
2368     fprintf(stderr, "%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
2369            tok_ident - TOK_IDENT, total_lines, total_bytes,
2370            tt, (int)(total_lines / tt),
2371            total_bytes / tt / 1000000.0);
2372 }
2373
2374 PUB_FUNC void tcc_set_environment(TCCState *s)
2375 {
2376     char * path;
2377
2378     path = getenv("C_INCLUDE_PATH");
2379     if(path != NULL) {
2380         tcc_add_include_path(s, path);
2381     }
2382     path = getenv("CPATH");
2383     if(path != NULL) {
2384         tcc_add_include_path(s, path);
2385     }
2386     path = getenv("LIBRARY_PATH");
2387     if(path != NULL) {
2388         tcc_add_library_path(s, path);
2389     }
2390 }