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 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);
 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 # 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     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
1148     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
1149 #else
1150     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
1151     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
1152 #endif
1153
1154 #ifdef TCC_TARGET_PE
1155     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
1156     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned short");
1157 #else
1158     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
1159     /* wint_t is unsigned int by default, but (signed) int on BSDs
1160        and unsigned short on windows.  Other OSes might have still
1161        other conventions, sigh.  */
1162 #if defined(__FreeBSD__) || defined (__FreeBSD_kernel__) || defined(__NetBSD__)
1163     tcc_define_symbol(s, "__WINT_TYPE__", "int");
1164 #else
1165     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned int");
1166 #endif
1167 #endif
1168
1169 #ifndef TCC_TARGET_PE
1170     /* glibc defines */
1171     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)", "name proto __asm__ (#alias)");
1172     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)", "name proto __asm__ (#alias) __THROW");
1173     /* paths for crt objects */
1174     tcc_split_path(s, (void ***)&s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
1175 #endif
1176
1177     /* no section zero */
1178     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
1179
1180     /* create standard sections */
1181     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
1182     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
1183     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
1184
1185     /* symbols are always generated for linking stage */
1186     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
1187                                 ".strtab",
1188                                 ".hashtab", SHF_PRIVATE);
1189     strtab_section = symtab_section->link;
1190     s->symtab = symtab_section;
1191
1192     /* private symbol table for dynamic symbols */
1193     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
1194                                       ".dynstrtab",
1195                                       ".dynhashtab", SHF_PRIVATE);
1196     s->alacarte_link = 1;
1197     s->nocommon = 1;
1198     s->warn_implicit_function_declaration = 1;
1199
1200 #ifdef CHAR_IS_UNSIGNED
1201     s->char_is_unsigned = 1;
1202 #endif
1203     /* enable this if you want symbols with leading underscore on windows: */
1204 #if 0 /* def TCC_TARGET_PE */
1205     s->leading_underscore = 1;
1206 #endif
1207 #ifdef TCC_TARGET_I386
1208     s->seg_size = 32;
1209 #endif
1210 #ifdef TCC_IS_NATIVE
1211     s->runtime_main = "main";
1212 #endif
1213     return s;
1214 }
1215
1216 LIBTCCAPI void tcc_delete(TCCState *s1)
1217 {
1218     int i;
1219     int bench = s1->do_bench;
1220
1221     tcc_cleanup();
1222
1223     /* close a preprocessor output */
1224     if (s1->ppfp && s1->ppfp != stdout)
1225         fclose(s1->ppfp);
1226
1227     /* free all sections */
1228     for(i = 1; i < s1->nb_sections; i++)
1229         free_section(s1->sections[i]);
1230     dynarray_reset(&s1->sections, &s1->nb_sections);
1231
1232     for(i = 0; i < s1->nb_priv_sections; i++)
1233         free_section(s1->priv_sections[i]);
1234     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1235
1236     /* free any loaded DLLs */
1237 #ifdef TCC_IS_NATIVE
1238     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1239         DLLReference *ref = s1->loaded_dlls[i];
1240         if ( ref->handle )
1241             dlclose(ref->handle);
1242     }
1243 #endif
1244
1245     /* free loaded dlls array */
1246     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1247
1248     /* free library paths */
1249     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1250     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
1251
1252     /* free include paths */
1253     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1254     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1255     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1256
1257     tcc_free(s1->tcc_lib_path);
1258     tcc_free(s1->soname);
1259     tcc_free(s1->rpath);
1260     tcc_free(s1->init_symbol);
1261     tcc_free(s1->fini_symbol);
1262     tcc_free(s1->outfile);
1263     tcc_free(s1->deps_outfile);
1264     dynarray_reset(&s1->files, &s1->nb_files);
1265     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
1266     dynarray_reset(&s1->pragma_libs, &s1->nb_pragma_libs);
1267
1268 #ifdef TCC_IS_NATIVE
1269 # ifdef HAVE_SELINUX
1270     munmap (s1->write_mem, s1->mem_size);
1271     munmap (s1->runtime_mem, s1->mem_size);
1272 # else
1273     tcc_free(s1->runtime_mem);
1274 # endif
1275 #endif
1276
1277     tcc_free(s1->sym_attrs);
1278     tcc_free(s1);
1279     tcc_memstats(bench);
1280 }
1281
1282 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
1283 {
1284     tcc_split_path(s, (void ***)&s->include_paths, &s->nb_include_paths, pathname);
1285     return 0;
1286 }
1287
1288 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
1289 {
1290     tcc_split_path(s, (void ***)&s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
1291     return 0;
1292 }
1293
1294 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags, int filetype)
1295 {
1296     ElfW(Ehdr) ehdr;
1297     int fd, ret, size;
1298
1299     parse_flags = 0;
1300 #ifdef CONFIG_TCC_ASM
1301     /* if .S file, define __ASSEMBLER__ like gcc does */
1302     if ((filetype == TCC_FILETYPE_ASM) || (filetype == TCC_FILETYPE_ASM_PP)) {
1303         tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
1304         parse_flags = PARSE_FLAG_ASM_FILE;
1305     }
1306 #endif
1307
1308     /* open the file */
1309     ret = tcc_open(s1, filename);
1310     if (ret < 0) {
1311         if (flags & AFF_PRINT_ERROR)
1312             tcc_error_noabort("file '%s' not found", filename);
1313         return ret;
1314     }
1315
1316     /* update target deps */
1317     dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1318             tcc_strdup(filename));
1319
1320     if (flags & AFF_PREPROCESS) {
1321         ret = tcc_preprocess(s1);
1322         goto the_end;
1323     }
1324
1325     if (filetype == TCC_FILETYPE_C) {
1326         /* C file assumed */
1327         ret = tcc_compile(s1);
1328         goto the_end;
1329     }
1330
1331 #ifdef CONFIG_TCC_ASM
1332     if (filetype == TCC_FILETYPE_ASM_PP) {
1333         /* non preprocessed assembler */
1334         ret = tcc_assemble(s1, 1);
1335         goto the_end;
1336     }
1337
1338     if (filetype == TCC_FILETYPE_ASM) {
1339         /* preprocessed assembler */
1340         ret = tcc_assemble(s1, 0);
1341         goto the_end;
1342     }
1343 #endif
1344
1345     fd = file->fd;
1346     /* assume executable format: auto guess file type */
1347     size = read(fd, &ehdr, sizeof(ehdr));
1348     lseek(fd, 0, SEEK_SET);
1349     if (size <= 0) {
1350         tcc_error_noabort("could not read header");
1351         goto the_end;
1352     }
1353
1354     if (size == sizeof(ehdr) &&
1355         ehdr.e_ident[0] == ELFMAG0 &&
1356         ehdr.e_ident[1] == ELFMAG1 &&
1357         ehdr.e_ident[2] == ELFMAG2 &&
1358         ehdr.e_ident[3] == ELFMAG3) {
1359
1360         /* do not display line number if error */
1361         file->line_num = 0;
1362         if (ehdr.e_type == ET_REL) {
1363             ret = tcc_load_object_file(s1, fd, 0);
1364             goto the_end;
1365
1366         }
1367 #ifndef TCC_TARGET_PE
1368         if (ehdr.e_type == ET_DYN) {
1369             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1370 #ifdef TCC_IS_NATIVE
1371                 void *h;
1372                 h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1373                 if (h)
1374 #endif
1375                     ret = 0;
1376             } else {
1377                 ret = tcc_load_dll(s1, fd, filename,
1378                                    (flags & AFF_REFERENCED_DLL) != 0);
1379             }
1380             goto the_end;
1381         }
1382 #endif
1383         tcc_error_noabort("unrecognized ELF file");
1384         goto the_end;
1385     }
1386
1387     if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
1388         file->line_num = 0; /* do not display line number if error */
1389         ret = tcc_load_archive(s1, fd);
1390         goto the_end;
1391     }
1392
1393 #ifdef TCC_TARGET_COFF
1394     if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
1395         ret = tcc_load_coff(s1, fd);
1396         goto the_end;
1397     }
1398 #endif
1399
1400 #ifdef TCC_TARGET_PE
1401     ret = pe_load_file(s1, filename, fd);
1402 #else
1403     /* as GNU ld, consider it is an ld script if not recognized */
1404     ret = tcc_load_ldscript(s1);
1405 #endif
1406     if (ret < 0)
1407         tcc_error_noabort("unrecognized file type");
1408
1409 the_end:
1410     tcc_close();
1411     return ret;
1412 }
1413
1414 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename, int filetype)
1415 {
1416     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1417         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS, filetype);
1418     else
1419         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR, filetype);
1420 }
1421
1422 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1423 {
1424     tcc_split_path(s, (void ***)&s->library_paths, &s->nb_library_paths, pathname);
1425     return 0;
1426 }
1427
1428 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1429     const char *filename, int flags, char **paths, int nb_paths)
1430 {
1431     char buf[1024];
1432     int i;
1433
1434     for(i = 0; i < nb_paths; i++) {
1435         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1436         if (tcc_add_file_internal(s, buf, flags, TCC_FILETYPE_BINARY) == 0)
1437             return 0;
1438     }
1439     return -1;
1440 }
1441
1442 #ifndef TCC_TARGET_PE
1443 /* find and load a dll. Return non zero if not found */
1444 /* XXX: add '-rpath' option support ? */
1445 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1446 {
1447     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1448         s->library_paths, s->nb_library_paths);
1449 }
1450 #endif
1451
1452 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename)
1453 {
1454     if (-1 == tcc_add_library_internal(s, "%s/%s",
1455         filename, 0, s->crt_paths, s->nb_crt_paths))
1456         tcc_error_noabort("file '%s' not found", filename);
1457     return 0;
1458 }
1459
1460 /* the library name is the same as the argument of the '-l' option */
1461 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1462 {
1463 #ifdef TCC_TARGET_PE
1464     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1465     const char **pp = s->static_link ? libs + 4 : libs;
1466 #else
1467     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1468     const char **pp = s->static_link ? libs + 1 : libs;
1469 #endif
1470     while (*pp) {
1471         if (0 == tcc_add_library_internal(s, *pp,
1472             libraryname, 0, s->library_paths, s->nb_library_paths))
1473             return 0;
1474         ++pp;
1475     }
1476     return -1;
1477 }
1478
1479 PUB_FUNC int tcc_add_library_err(TCCState *s, const char *libname)
1480 {
1481     int ret = tcc_add_library(s, libname);
1482     if (ret < 0)
1483         tcc_error_noabort("cannot find library 'lib%s'", libname);
1484     return ret;
1485 }
1486
1487 /* habdle #pragma comment(lib,) */
1488 ST_FUNC void tcc_add_pragma_libs(TCCState *s1)
1489 {
1490     int i;
1491     for (i = 0; i < s1->nb_pragma_libs; i++)
1492         tcc_add_library_err(s1, s1->pragma_libs[i]);
1493 }
1494
1495 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1496 {
1497 #ifdef TCC_TARGET_PE
1498     /* On x86_64 'val' might not be reachable with a 32bit offset.
1499        So it is handled here as if it were in a DLL. */
1500     pe_putimport(s, 0, name, (uintptr_t)val);
1501 #else
1502     add_elf_sym(symtab_section, (uintptr_t)val, 0,
1503         ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1504         SHN_ABS, name);
1505 #endif
1506     return 0;
1507 }
1508
1509
1510 /* Windows stat* ( https://msdn.microsoft.com/en-us/library/14h5k7ff.aspx ):
1511  * - st_gid, st_ino, st_uid: only valid on "unix" file systems (not FAT, NTFS, etc)
1512  * - st_atime, st_ctime: not valid on FAT, valid on NTFS.
1513  * - Other fields should be reasonably compatible (and S_ISDIR should work).
1514  *
1515  * BY_HANDLE_FILE_INFORMATION ( https://msdn.microsoft.com/en-us/library/windows/desktop/aa363788%28v=vs.85%29.aspx ):
1516  * - File index (combined nFileIndexHigh and nFileIndexLow) _may_ change when the file is opened.
1517  *   - But on NTFS: it's guaranteed to be the same value until the file is deleted.
1518  * - On windows server 2012 there's a 128b file id, and the 64b one via
1519  *   nFileIndex* is not guaranteed to be unique.
1520  *
1521  * - MS Docs suggest to that volume number with the file index could be used to
1522  *   check if two handles refer to the same file.
1523  */
1524 #ifndef _WIN32
1525 typedef struct stat                file_info_t;
1526 #else
1527 typedef BY_HANDLE_FILE_INFORMATION file_info_t;
1528 #endif
1529
1530 int get_file_info(const char *fname, file_info_t *out_info)
1531 {
1532 #ifndef _WIN32
1533     return stat(fname, out_info);
1534 #else
1535     int rv = 1;
1536     HANDLE h = CreateFile(fname, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,
1537                           FILE_ATTRIBUTE_NORMAL|FILE_FLAG_BACKUP_SEMANTICS, NULL);
1538
1539     if (h != INVALID_HANDLE_VALUE) {
1540         rv = !GetFileInformationByHandle(h, out_info);
1541         CloseHandle(h);
1542     }
1543     return rv;
1544 #endif
1545 }
1546
1547 int is_dir(file_info_t *info)
1548 {
1549 #ifndef _WIN32
1550     return S_ISDIR(info->st_mode);
1551 #else
1552     return (info->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ==
1553            FILE_ATTRIBUTE_DIRECTORY;
1554 #endif
1555 }
1556
1557 int is_same_file(const file_info_t *fi1, const file_info_t *fi2)
1558 {
1559 #ifndef _WIN32
1560     return fi1->st_dev == fi2->st_dev &&
1561            fi1->st_ino == fi2->st_ino;
1562 #else
1563     return fi1->dwVolumeSerialNumber == fi2->dwVolumeSerialNumber &&
1564            fi1->nFileIndexHigh       == fi2->nFileIndexHigh &&
1565            fi1->nFileIndexLow        == fi2->nFileIndexLow;
1566 #endif
1567 }
1568
1569 static void
1570 tcc_normalize_inc_dirs_aux(file_info_t *stats, size_t *pnum, char **path)
1571 {
1572     size_t i, num = *pnum;
1573     if (get_file_info(*path, &stats[num]) || !is_dir(&stats[num]))
1574         goto remove;
1575     for (i = 0; i < num; i++)
1576         if (is_same_file(&stats[i], &stats[num]))
1577             goto remove;
1578     *pnum = num + 1;
1579     return;
1580  remove:
1581     tcc_free(*path);
1582     *path = 0;
1583 }
1584
1585 /* Remove non-existent and duplicate directories from include paths. */
1586 ST_FUNC void tcc_normalize_inc_dirs(TCCState *s)
1587 {
1588     file_info_t *stats =
1589         tcc_malloc(((size_t)s->nb_sysinclude_paths + s->nb_include_paths) *
1590                    sizeof(*stats));
1591     size_t i, num = 0;
1592     for (i = 0; i < s->nb_sysinclude_paths; i++)
1593         tcc_normalize_inc_dirs_aux(stats, &num, &s->sysinclude_paths[i]);
1594     for (i = 0; i < s->nb_include_paths; i++)
1595         tcc_normalize_inc_dirs_aux(stats, &num, &s->include_paths[i]);
1596     tcc_free(stats);
1597 }
1598
1599 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
1600 {
1601     s->output_type = output_type;
1602
1603     if (s->output_type == TCC_OUTPUT_PREPROCESS) {
1604         if (!s->outfile) {
1605             s->ppfp = stdout;
1606         } else {
1607             s->ppfp = fopen(s->outfile, "w");
1608             if (!s->ppfp)
1609                 tcc_error("could not write '%s'", s->outfile);
1610         }
1611     }
1612
1613     if (!s->nostdinc) {
1614         /* default include paths */
1615         /* -isystem paths have already been handled */
1616         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
1617     }
1618
1619     /* if bound checking, then add corresponding sections */
1620 #ifdef CONFIG_TCC_BCHECK
1621     if (s->do_bounds_check) {
1622         /* define symbol */
1623         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1624         /* create bounds sections */
1625         bounds_section = new_section(s, ".bounds",
1626                                      SHT_PROGBITS, SHF_ALLOC);
1627         lbounds_section = new_section(s, ".lbounds",
1628                                       SHT_PROGBITS, SHF_ALLOC);
1629     }
1630 #endif
1631
1632     if (s->char_is_unsigned) {
1633         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
1634     }
1635
1636     /* add debug sections */
1637     if (s->do_debug) {
1638         /* stab symbols */
1639         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
1640         stab_section->sh_entsize = sizeof(Stab_Sym);
1641         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
1642         put_elf_str(stabstr_section, "");
1643         stab_section->link = stabstr_section;
1644         /* put first entry */
1645         put_stabs("", 0, 0, 0, 0);
1646     }
1647
1648     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
1649 #ifdef TCC_TARGET_PE
1650 # ifdef _WIN32
1651     tcc_add_systemdir(s);
1652 # endif
1653 #else
1654     /* add libc crt1/crti objects */
1655     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1656         !s->nostdlib) {
1657         if (output_type != TCC_OUTPUT_DLL)
1658             tcc_add_crt(s, "crt1.o");
1659         tcc_add_crt(s, "crti.o");
1660     }
1661 #endif
1662 #ifdef CONFIG_TCC_BCHECK
1663     if (s->do_bounds_check && (output_type == TCC_OUTPUT_EXE))
1664     {
1665         /* force a bcheck.o linking */
1666         addr_t func = TOK___bound_init;
1667         Sym *sym = external_global_sym(func, &func_old_type, 0);
1668         if (!sym->c)
1669             put_extern_sym(sym, NULL, 0, 0);
1670     }
1671 #endif
1672     if (s->normalize_inc_dirs)
1673         tcc_normalize_inc_dirs(s);
1674     return 0;
1675 }
1676
1677 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1678 {
1679     tcc_free(s->tcc_lib_path);
1680     s->tcc_lib_path = tcc_strdup(path);
1681 }
1682
1683 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1684 #define FD_INVERT 0x0002 /* invert value before storing */
1685
1686 typedef struct FlagDef {
1687     uint16_t offset;
1688     uint16_t flags;
1689     const char *name;
1690 } FlagDef;
1691
1692 static const FlagDef warning_defs[] = {
1693     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1694     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1695     { offsetof(TCCState, warn_error), 0, "error" },
1696     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1697       "implicit-function-declaration" },
1698 };
1699
1700 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1701                     const char *name, int value)
1702 {
1703     int i;
1704     const FlagDef *p;
1705     const char *r;
1706
1707     r = name;
1708     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
1709         r += 3;
1710         value = !value;
1711     }
1712     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1713         if (!strcmp(r, p->name))
1714             goto found;
1715     }
1716     return -1;
1717  found:
1718     if (p->flags & FD_INVERT)
1719         value = !value;
1720     *(int *)((uint8_t *)s + p->offset) = value;
1721     return 0;
1722 }
1723
1724 /* set/reset a warning */
1725 static int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1726 {
1727     int i;
1728     const FlagDef *p;
1729
1730     if (!strcmp(warning_name, "all")) {
1731         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1732             if (p->flags & WD_ALL)
1733                 *(int *)((uint8_t *)s + p->offset) = 1;
1734         }
1735         return 0;
1736     } else {
1737         return set_flag(s, warning_defs, countof(warning_defs),
1738                         warning_name, value);
1739     }
1740 }
1741
1742 static const FlagDef flag_defs[] = {
1743     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1744     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1745     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1746     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1747     { offsetof(TCCState, ms_extensions), 0, "ms-extensions" },
1748     { offsetof(TCCState, old_struct_init_code), 0, "old-struct-init-code" },
1749     { offsetof(TCCState, dollars_in_identifiers), 0, "dollars-in-identifiers" },
1750     { offsetof(TCCState, normalize_inc_dirs), 0, "normalize-inc-dirs" },
1751 };
1752
1753 /* set/reset a flag */
1754 static int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1755 {
1756     return set_flag(s, flag_defs, countof(flag_defs),
1757                     flag_name, value);
1758 }
1759
1760
1761 static int strstart(const char *val, const char **str)
1762 {
1763     const char *p, *q;
1764     p = *str;
1765     q = val;
1766     while (*q) {
1767         if (*p != *q)
1768             return 0;
1769         p++;
1770         q++;
1771     }
1772     *str = p;
1773     return 1;
1774 }
1775
1776 /* Like strstart, but automatically takes into account that ld options can
1777  *
1778  * - start with double or single dash (e.g. '--soname' or '-soname')
1779  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1780  *   or '-Wl,-soname=x.so')
1781  *
1782  * you provide `val` always in 'option[=]' form (no leading -)
1783  */
1784 static int link_option(const char *str, const char *val, const char **ptr)
1785 {
1786     const char *p, *q;
1787
1788     /* there should be 1 or 2 dashes */
1789     if (*str++ != '-')
1790         return 0;
1791     if (*str == '-')
1792         str++;
1793
1794     /* then str & val should match (potentialy up to '=') */
1795     p = str;
1796     q = val;
1797
1798     while (*q != '\0' && *q != '=') {
1799         if (*p != *q)
1800             return 0;
1801         p++;
1802         q++;
1803     }
1804
1805     /* '=' near eos means ',' or '=' is ok */
1806     if (*q == '=') {
1807         if (*p != ',' && *p != '=')
1808             return 0;
1809         p++;
1810         q++;
1811     }
1812
1813     if (ptr)
1814         *ptr = p;
1815     return 1;
1816 }
1817
1818 static const char *skip_linker_arg(const char **str)
1819 {
1820     const char *s1 = *str;
1821     const char *s2 = strchr(s1, ',');
1822     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1823     return s2;
1824 }
1825
1826 static char *copy_linker_arg(const char *p)
1827 {
1828     const char *q = p;
1829     skip_linker_arg(&q);
1830     return pstrncpy(tcc_malloc(q - p + 1), p, q - p);
1831 }
1832
1833 /* set linker options */
1834 static int tcc_set_linker(TCCState *s, const char *option)
1835 {
1836     while (option && *option) {
1837
1838         const char *p = option;
1839         char *end = NULL;
1840         int ignoring = 0;
1841
1842         if (link_option(option, "Bsymbolic", &p)) {
1843             s->symbolic = 1;
1844         } else if (link_option(option, "nostdlib", &p)) {
1845             s->nostdlib = 1;
1846         } else if (link_option(option, "fini=", &p)) {
1847             s->fini_symbol = copy_linker_arg(p);
1848             ignoring = 1;
1849         } else if (link_option(option, "image-base=", &p)
1850                 || link_option(option, "Ttext=", &p)) {
1851             s->text_addr = strtoull(p, &end, 16);
1852             s->has_text_addr = 1;
1853         } else if (link_option(option, "init=", &p)) {
1854             s->init_symbol = copy_linker_arg(p);
1855             ignoring = 1;
1856         } else if (link_option(option, "oformat=", &p)) {
1857 #if defined(TCC_TARGET_PE)
1858             if (strstart("pe-", &p)) {
1859 #elif defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1860             if (strstart("elf64-", &p)) {
1861 #else
1862             if (strstart("elf32-", &p)) {
1863 #endif
1864                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1865             } else if (!strcmp(p, "binary")) {
1866                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1867 #ifdef TCC_TARGET_COFF
1868             } else if (!strcmp(p, "coff")) {
1869                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1870 #endif
1871             } else
1872                 goto err;
1873
1874         } else if (link_option(option, "as-needed", &p)) {
1875             ignoring = 1;
1876         } else if (link_option(option, "O", &p)) {
1877             ignoring = 1;
1878         } else if (link_option(option, "rpath=", &p)) {
1879             s->rpath = copy_linker_arg(p);
1880         } else if (link_option(option, "section-alignment=", &p)) {
1881             s->section_align = strtoul(p, &end, 16);
1882         } else if (link_option(option, "soname=", &p)) {
1883             s->soname = copy_linker_arg(p);
1884 #ifdef TCC_TARGET_PE
1885         } else if (link_option(option, "file-alignment=", &p)) {
1886             s->pe_file_align = strtoul(p, &end, 16);
1887         } else if (link_option(option, "stack=", &p)) {
1888             s->pe_stack_size = strtoul(p, &end, 10);
1889         } else if (link_option(option, "subsystem=", &p)) {
1890 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1891             if (!strcmp(p, "native")) {
1892                 s->pe_subsystem = 1;
1893             } else if (!strcmp(p, "console")) {
1894                 s->pe_subsystem = 3;
1895             } else if (!strcmp(p, "gui")) {
1896                 s->pe_subsystem = 2;
1897             } else if (!strcmp(p, "posix")) {
1898                 s->pe_subsystem = 7;
1899             } else if (!strcmp(p, "efiapp")) {
1900                 s->pe_subsystem = 10;
1901             } else if (!strcmp(p, "efiboot")) {
1902                 s->pe_subsystem = 11;
1903             } else if (!strcmp(p, "efiruntime")) {
1904                 s->pe_subsystem = 12;
1905             } else if (!strcmp(p, "efirom")) {
1906                 s->pe_subsystem = 13;
1907 #elif defined(TCC_TARGET_ARM)
1908             if (!strcmp(p, "wince")) {
1909                 s->pe_subsystem = 9;
1910 #endif
1911             } else
1912                 goto err;
1913 #endif
1914         } else
1915             goto err;
1916
1917         if (ignoring && s->warn_unsupported) err: {
1918             char buf[100], *e;
1919             pstrcpy(buf, sizeof buf, e = copy_linker_arg(option)), tcc_free(e);
1920             if (ignoring)
1921                 tcc_warning("unsupported linker option '%s'", buf);
1922             else
1923                 tcc_error("unsupported linker option '%s'", buf);
1924         }
1925         option = skip_linker_arg(&p);
1926     }
1927     return 0;
1928 }
1929
1930 typedef struct TCCOption {
1931     const char *name;
1932     uint16_t index;
1933     uint16_t flags;
1934 } TCCOption;
1935
1936 enum {
1937     TCC_OPTION_HELP,
1938     TCC_OPTION_I,
1939     TCC_OPTION_D,
1940     TCC_OPTION_U,
1941     TCC_OPTION_P,
1942     TCC_OPTION_L,
1943     TCC_OPTION_B,
1944     TCC_OPTION_l,
1945     TCC_OPTION_bench,
1946     TCC_OPTION_bt,
1947     TCC_OPTION_b,
1948     TCC_OPTION_g,
1949     TCC_OPTION_c,
1950     TCC_OPTION_dumpversion,
1951     TCC_OPTION_d,
1952     TCC_OPTION_float_abi,
1953     TCC_OPTION_static,
1954     TCC_OPTION_std,
1955     TCC_OPTION_shared,
1956     TCC_OPTION_soname,
1957     TCC_OPTION_o,
1958     TCC_OPTION_r,
1959     TCC_OPTION_s,
1960     TCC_OPTION_traditional,
1961     TCC_OPTION_Wl,
1962     TCC_OPTION_W,
1963     TCC_OPTION_O,
1964     TCC_OPTION_m,
1965     TCC_OPTION_f,
1966     TCC_OPTION_isystem,
1967     TCC_OPTION_iwithprefix,
1968     TCC_OPTION_nostdinc,
1969     TCC_OPTION_nostdlib,
1970     TCC_OPTION_print_search_dirs,
1971     TCC_OPTION_rdynamic,
1972     TCC_OPTION_pedantic,
1973     TCC_OPTION_pthread,
1974     TCC_OPTION_run,
1975     TCC_OPTION_v,
1976     TCC_OPTION_w,
1977     TCC_OPTION_pipe,
1978     TCC_OPTION_E,
1979     TCC_OPTION_MD,
1980     TCC_OPTION_MF,
1981     TCC_OPTION_x
1982 };
1983
1984 #define TCC_OPTION_HAS_ARG 0x0001
1985 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1986
1987 static const TCCOption tcc_options[] = {
1988     { "h", TCC_OPTION_HELP, 0 },
1989     { "-help", TCC_OPTION_HELP, 0 },
1990     { "?", TCC_OPTION_HELP, 0 },
1991     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1992     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1993     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1994     { "P", TCC_OPTION_P, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1995     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1996     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1997     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1998     { "bench", TCC_OPTION_bench, 0 },
1999 #ifdef CONFIG_TCC_BACKTRACE
2000     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
2001 #endif
2002 #ifdef CONFIG_TCC_BCHECK
2003     { "b", TCC_OPTION_b, 0 },
2004 #endif
2005     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2006     { "c", TCC_OPTION_c, 0 },
2007     { "dumpversion", TCC_OPTION_dumpversion, 0},
2008     { "d", TCC_OPTION_d, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2009 #ifdef TCC_TARGET_ARM
2010     { "mfloat-abi", TCC_OPTION_float_abi, TCC_OPTION_HAS_ARG },
2011 #endif
2012     { "static", TCC_OPTION_static, 0 },
2013     { "std", TCC_OPTION_std, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2014     { "shared", TCC_OPTION_shared, 0 },
2015     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
2016     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
2017     { "pedantic", TCC_OPTION_pedantic, 0},
2018     { "pthread", TCC_OPTION_pthread, 0},
2019     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2020     { "rdynamic", TCC_OPTION_rdynamic, 0 },
2021     { "r", TCC_OPTION_r, 0 },
2022     { "s", TCC_OPTION_s, 0 },
2023     { "traditional", TCC_OPTION_traditional, 0 },
2024     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2025     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2026     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2027     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG },
2028     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2029     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
2030     { "iwithprefix", TCC_OPTION_iwithprefix, TCC_OPTION_HAS_ARG },
2031     { "nostdinc", TCC_OPTION_nostdinc, 0 },
2032     { "nostdlib", TCC_OPTION_nostdlib, 0 },
2033     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
2034     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2035     { "w", TCC_OPTION_w, 0 },
2036     { "pipe", TCC_OPTION_pipe, 0},
2037     { "E", TCC_OPTION_E, 0},
2038     { "MD", TCC_OPTION_MD, 0},
2039     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
2040     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
2041     { NULL, 0, 0 },
2042 };
2043
2044 static void parse_option_D(TCCState *s1, const char *optarg)
2045 {
2046     char *sym = tcc_strdup(optarg);
2047     char *value = strchr(sym, '=');
2048     if (value)
2049         *value++ = '\0';
2050     tcc_define_symbol(s1, sym, value);
2051     tcc_free(sym);
2052 }
2053
2054 static void args_parser_add_file(TCCState *s, const char* filename, int filetype)
2055 {
2056     int len = strlen(filename);
2057     char *p = tcc_malloc(len + 2);
2058     if (filetype) {
2059         *p = filetype;
2060     }
2061     else {
2062         /* use a file extension to detect a filetype */
2063         const char *ext = tcc_fileextension(filename);
2064         if (ext[0]) {
2065             ext++;
2066             if (!strcmp(ext, "S"))
2067                 *p = TCC_FILETYPE_ASM_PP;
2068             else
2069             if (!strcmp(ext, "s"))
2070                 *p = TCC_FILETYPE_ASM;
2071             else
2072             if (!PATHCMP(ext, "c") || !PATHCMP(ext, "i"))
2073                 *p = TCC_FILETYPE_C;
2074             else
2075                 *p = TCC_FILETYPE_BINARY;
2076         }
2077         else {
2078             *p = TCC_FILETYPE_C;
2079         }
2080     }
2081     strcpy(p+1, filename);
2082     dynarray_add((void ***)&s->files, &s->nb_files, p);
2083 }
2084
2085 ST_FUNC int tcc_parse_args1(TCCState *s, int argc, char **argv)
2086 {
2087     const TCCOption *popt;
2088     const char *optarg, *r;
2089     int optind = 0;
2090     ParseArgsState *pas = s->parse_args_state;
2091
2092     while (optind < argc) {
2093
2094         r = argv[optind++];
2095         if (r[0] != '-' || r[1] == '\0') {
2096             /* handle list files */
2097             if (r[0] == '@' && r[1]) {
2098                 char buf[sizeof file->filename], *p;
2099                 char **argv = NULL;
2100                 int argc = 0;
2101                 FILE *fp;
2102
2103                 fp = fopen(r + 1, "rb");
2104                 if (fp == NULL)
2105                     tcc_error("list file '%s' not found", r + 1);
2106                 while (fgets(buf, sizeof buf, fp)) {
2107                     p = trimfront(trimback(buf, strchr(buf, 0)));
2108                     if (0 == *p || ';' == *p)
2109                         continue;
2110                     dynarray_add((void ***)&argv, &argc, tcc_strdup(p));
2111                 }
2112                 fclose(fp);
2113                 tcc_parse_args1(s, argc, argv);
2114                 dynarray_reset(&argv, &argc);
2115             } else {
2116                 args_parser_add_file(s, r, pas->filetype);
2117                 if (pas->run) {
2118                     optind--;
2119                     /* argv[0] will be this file */
2120                     break;
2121                 }
2122             }
2123             continue;
2124         }
2125
2126         /* find option in table */
2127         for(popt = tcc_options; ; ++popt) {
2128             const char *p1 = popt->name;
2129             const char *r1 = r + 1;
2130             if (p1 == NULL)
2131                 tcc_error("invalid option -- '%s'", r);
2132             if (!strstart(p1, &r1))
2133                 continue;
2134             optarg = r1;
2135             if (popt->flags & TCC_OPTION_HAS_ARG) {
2136                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
2137                     if (optind >= argc)
2138                         tcc_error("argument to '%s' is missing", r);
2139                     optarg = argv[optind++];
2140                 }
2141             } else if (*r1 != '\0')
2142                 continue;
2143             break;
2144         }
2145
2146         switch(popt->index) {
2147         case TCC_OPTION_HELP:
2148             return 0;
2149         case TCC_OPTION_I:
2150             tcc_add_include_path(s, optarg);
2151             break;
2152         case TCC_OPTION_D:
2153             parse_option_D(s, optarg);
2154             break;
2155         case TCC_OPTION_U:
2156             tcc_undefine_symbol(s, optarg);
2157             break;
2158         case TCC_OPTION_L:
2159             tcc_add_library_path(s, optarg);
2160             break;
2161         case TCC_OPTION_B:
2162             /* set tcc utilities path (mainly for tcc development) */
2163             tcc_set_lib_path(s, optarg);
2164             break;
2165         case TCC_OPTION_l:
2166             args_parser_add_file(s, r, TCC_FILETYPE_BINARY);
2167             s->nb_libraries++;
2168             break;
2169         case TCC_OPTION_pthread:
2170             parse_option_D(s, "_REENTRANT");
2171             pas->pthread = 1;
2172             break;
2173         case TCC_OPTION_bench:
2174             s->do_bench = 1;
2175             break;
2176 #ifdef CONFIG_TCC_BACKTRACE
2177         case TCC_OPTION_bt:
2178             tcc_set_num_callers(atoi(optarg));
2179             break;
2180 #endif
2181 #ifdef CONFIG_TCC_BCHECK
2182         case TCC_OPTION_b:
2183             s->do_bounds_check = 1;
2184             s->do_debug = 1;
2185             break;
2186 #endif
2187         case TCC_OPTION_g:
2188             s->do_debug = 1;
2189             break;
2190         case TCC_OPTION_c:
2191             if (s->output_type)
2192                 tcc_warning("-c: some compiler action already specified (%d)", s->output_type);
2193             s->output_type = TCC_OUTPUT_OBJ;
2194             break;
2195         case TCC_OPTION_d:
2196             if (*optarg == 'D')
2197                 s->dflag = 3;
2198             else if (*optarg == 'M')
2199                 s->dflag = 7;
2200             else if (*optarg == 'b')
2201                 s->dflag = 8;
2202             else
2203                 goto unsupported_option;
2204             break;
2205 #ifdef TCC_TARGET_ARM
2206         case TCC_OPTION_float_abi:
2207             /* tcc doesn't support soft float yet */
2208             if (!strcmp(optarg, "softfp")) {
2209                 s->float_abi = ARM_SOFTFP_FLOAT;
2210                 tcc_undefine_symbol(s, "__ARM_PCS_VFP");
2211             } else if (!strcmp(optarg, "hard"))
2212                 s->float_abi = ARM_HARD_FLOAT;
2213             else
2214                 tcc_error("unsupported float abi '%s'", optarg);
2215             break;
2216 #endif
2217         case TCC_OPTION_static:
2218             s->static_link = 1;
2219             break;
2220         case TCC_OPTION_std:
2221             /* silently ignore, a current purpose:
2222                allow to use a tcc as a reference compiler for "make test" */
2223             break;
2224         case TCC_OPTION_shared:
2225             if (s->output_type)
2226                 tcc_warning("-shared: some compiler action already specified (%d)", s->output_type);
2227             s->output_type = TCC_OUTPUT_DLL;
2228             break;
2229         case TCC_OPTION_soname:
2230             s->soname = tcc_strdup(optarg);
2231             break;
2232         case TCC_OPTION_m:
2233             s->option_m = tcc_strdup(optarg);
2234             break;
2235         case TCC_OPTION_o:
2236             if (s->outfile) {
2237                 tcc_warning("multiple -o option");
2238                 tcc_free(s->outfile);
2239             }
2240             s->outfile = tcc_strdup(optarg);
2241             break;
2242         case TCC_OPTION_r:
2243             /* generate a .o merging several output files */
2244             if (s->output_type)
2245                 tcc_warning("-r: some compiler action already specified (%d)", s->output_type);
2246             s->option_r = 1;
2247             s->output_type = TCC_OUTPUT_OBJ;
2248             break;
2249         case TCC_OPTION_isystem:
2250             tcc_add_sysinclude_path(s, optarg);
2251             break;
2252         case TCC_OPTION_iwithprefix:
2253             if (1) {
2254                 char buf[1024];
2255                 int buf_size = sizeof(buf)-1;
2256                 char *p = &buf[0];
2257
2258                 char *sysroot = "{B}/";
2259                 int len = strlen(sysroot);
2260                 if (len > buf_size)
2261                     len = buf_size;
2262                 strncpy(p, sysroot, len);
2263                 p += len;
2264                 buf_size -= len;
2265
2266                 len = strlen(optarg);
2267                 if (len > buf_size)
2268                     len = buf_size;
2269                 strncpy(p, optarg, len+1);
2270                 tcc_add_sysinclude_path(s, buf);
2271             }
2272             break;
2273         case TCC_OPTION_nostdinc:
2274             s->nostdinc = 1;
2275             break;
2276         case TCC_OPTION_nostdlib:
2277             s->nostdlib = 1;
2278             break;
2279         case TCC_OPTION_print_search_dirs:
2280             s->print_search_dirs = 1;
2281             break;
2282         case TCC_OPTION_run:
2283             if (s->output_type)
2284                 tcc_warning("-run: some compiler action already specified (%d)", s->output_type);
2285             s->output_type = TCC_OUTPUT_MEMORY;
2286             tcc_set_options(s, optarg);
2287             pas->run = 1;
2288             break;
2289         case TCC_OPTION_v:
2290             do ++s->verbose; while (*optarg++ == 'v');
2291             break;
2292         case TCC_OPTION_f:
2293             if (tcc_set_flag(s, optarg, 1) < 0)
2294                 goto unsupported_option;
2295             break;
2296         case TCC_OPTION_W:
2297             if (tcc_set_warning(s, optarg, 1) < 0)
2298                 goto unsupported_option;
2299             break;
2300         case TCC_OPTION_w:
2301             s->warn_none = 1;
2302             break;
2303         case TCC_OPTION_rdynamic:
2304             s->rdynamic = 1;
2305             break;
2306         case TCC_OPTION_Wl:
2307             if (pas->linker_arg.size)
2308                 --pas->linker_arg.size, cstr_ccat(&pas->linker_arg, ',');
2309             cstr_cat(&pas->linker_arg, optarg, 0);
2310             break;
2311         case TCC_OPTION_E:
2312             if (s->output_type)
2313                 tcc_warning("-E: some compiler action already specified (%d)", s->output_type);
2314             s->output_type = TCC_OUTPUT_PREPROCESS;
2315             break;
2316         case TCC_OPTION_P:
2317             s->Pflag = atoi(optarg) + 1;
2318             break;
2319         case TCC_OPTION_MD:
2320             s->gen_deps = 1;
2321             break;
2322         case TCC_OPTION_MF:
2323             s->deps_outfile = tcc_strdup(optarg);
2324             break;
2325         case TCC_OPTION_dumpversion:
2326             printf ("%s\n", TCC_VERSION);
2327             exit(0);
2328         case TCC_OPTION_s:
2329             s->do_strip = 1;
2330             break;
2331         case TCC_OPTION_traditional:
2332             break;
2333         case TCC_OPTION_x:
2334             if (*optarg == 'c')
2335                 pas->filetype = TCC_FILETYPE_C;
2336             else
2337             if (*optarg == 'a')
2338                 pas->filetype = TCC_FILETYPE_ASM_PP;
2339             else
2340             if (*optarg == 'n')
2341                 pas->filetype = 0;
2342             else
2343                 tcc_warning("unsupported language '%s'", optarg);
2344             break;
2345         case TCC_OPTION_O:
2346             if (1) {
2347                 int opt = atoi(optarg);
2348                 char *sym = "__OPTIMIZE__";
2349                 if (opt)
2350                     tcc_define_symbol(s, sym, 0);
2351                 else
2352                     tcc_undefine_symbol(s, sym);
2353             }
2354             break;
2355         case TCC_OPTION_pedantic:
2356         case TCC_OPTION_pipe:
2357             /* ignored */
2358             break;
2359         default:
2360 unsupported_option:
2361             if (s->warn_unsupported)
2362                 tcc_warning("unsupported option '%s'", r);
2363             break;
2364         }
2365     }
2366     return optind;
2367 }
2368
2369 PUB_FUNC int tcc_parse_args(TCCState *s, int argc, char **argv)
2370 {
2371     ParseArgsState *pas;
2372     int ret, is_allocated = 0;
2373
2374     if (!s->parse_args_state) {
2375         s->parse_args_state = tcc_mallocz(sizeof(ParseArgsState));
2376         cstr_new(&s->parse_args_state->linker_arg);
2377         is_allocated = 1;
2378     }
2379     pas = s->parse_args_state;
2380
2381     ret = tcc_parse_args1(s, argc, argv);
2382
2383     if (s->output_type == 0)
2384         s->output_type = TCC_OUTPUT_EXE;
2385
2386     if (pas->pthread && s->output_type != TCC_OUTPUT_OBJ)
2387         tcc_set_options(s, "-lpthread");
2388
2389     if (s->output_type == TCC_OUTPUT_EXE)
2390         tcc_set_linker(s, (const char *)pas->linker_arg.data);
2391
2392     if (is_allocated) {
2393         cstr_free(&pas->linker_arg);
2394         tcc_free(pas);
2395         s->parse_args_state = NULL;
2396     }
2397     return ret;
2398 }
2399
2400 LIBTCCAPI int tcc_set_options(TCCState *s, const char *str)
2401 {
2402     const char *s1;
2403     char **argv, *arg;
2404     int argc, len;
2405     int ret;
2406
2407     argc = 0, argv = NULL;
2408     for(;;) {
2409         while (is_space(*str))
2410             str++;
2411         if (*str == '\0')
2412             break;
2413         s1 = str;
2414         while (*str != '\0' && !is_space(*str))
2415             str++;
2416         len = str - s1;
2417         arg = tcc_malloc(len + 1);
2418         pstrncpy(arg, s1, len);
2419         dynarray_add((void ***)&argv, &argc, arg);
2420     }
2421     ret = tcc_parse_args(s, argc, argv);
2422     dynarray_reset(&argv, &argc);
2423     return ret;
2424 }
2425
2426 PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time)
2427 {
2428     double tt;
2429     tt = (double)total_time / 1000000.0;
2430     if (tt < 0.001)
2431         tt = 0.001;
2432     if (total_bytes < 1)
2433         total_bytes = 1;
2434     fprintf(stderr, "%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
2435            tok_ident - TOK_IDENT, total_lines, total_bytes,
2436            tt, (int)(total_lines / tt),
2437            total_bytes / tt / 1000000.0);
2438 }
2439
2440 PUB_FUNC void tcc_set_environment(TCCState *s)
2441 {
2442     char * path;
2443
2444     path = getenv("C_INCLUDE_PATH");
2445     if(path != NULL) {
2446         tcc_add_include_path(s, path);
2447     }
2448     path = getenv("CPATH");
2449     if(path != NULL) {
2450         tcc_add_include_path(s, path);
2451     }
2452     path = getenv("LIBRARY_PATH");
2453     if(path != NULL) {
2454         tcc_add_library_path(s, path);
2455     }
2456 }