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