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