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 = get_tok_str(sym->asm_label, NULL);
 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 # if defined(__NetBSD__)
1142 #  define str(s) #s
1143     tcc_define_symbol(s, "__NetBSD__", str( __NetBSD__));
1144 #  undef str
1145 # endif
1146
1147     /* TinyCC & gcc defines */
1148 #if defined TCC_TARGET_PE && defined TCC_TARGET_X86_64
1149     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
1150     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
1151 #else
1152     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
1153     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
1154 #endif
1155
1156 #ifdef TCC_TARGET_PE
1157     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
1158     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned short");
1159 #else
1160     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
1161     /* wint_t is unsigned int by default, but (signed) int on BSDs
1162        and unsigned short on windows.  Other OSes might have still
1163        other conventions, sigh.  */
1164 #if defined(__FreeBSD__) || defined (__FreeBSD_kernel__) || defined(__NetBSD__)
1165     tcc_define_symbol(s, "__WINT_TYPE__", "int");
1166 #else
1167     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned int");
1168 #endif
1169 #endif
1170
1171 #ifndef TCC_TARGET_PE
1172     /* glibc defines */
1173     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)", "name proto __asm__ (#alias)");
1174     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)", "name proto __asm__ (#alias) __THROW");
1175     /* paths for crt objects */
1176     tcc_split_path(s, (void ***)&s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
1177 #endif
1178
1179     /* no section zero */
1180     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
1181
1182     /* create standard sections */
1183     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
1184     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
1185     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
1186
1187     /* symbols are always generated for linking stage */
1188     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
1189                                 ".strtab",
1190                                 ".hashtab", SHF_PRIVATE);
1191     strtab_section = symtab_section->link;
1192     s->symtab = symtab_section;
1193
1194     /* private symbol table for dynamic symbols */
1195     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
1196                                       ".dynstrtab",
1197                                       ".dynhashtab", SHF_PRIVATE);
1198     s->alacarte_link = 1;
1199     s->nocommon = 1;
1200     s->warn_implicit_function_declaration = 1;
1201
1202 #ifdef CHAR_IS_UNSIGNED
1203     s->char_is_unsigned = 1;
1204 #endif
1205     /* enable this if you want symbols with leading underscore on windows: */
1206 #if 0 /* def TCC_TARGET_PE */
1207     s->leading_underscore = 1;
1208 #endif
1209 #ifdef TCC_TARGET_I386
1210     s->seg_size = 32;
1211 #endif
1212 #ifdef TCC_IS_NATIVE
1213     s->runtime_main = "main";
1214 #endif
1215     return s;
1216 }
1217
1218 LIBTCCAPI void tcc_delete(TCCState *s1)
1219 {
1220     int i;
1221     int bench = s1->do_bench;
1222
1223     tcc_cleanup();
1224
1225     /* close a preprocessor output */
1226     if (s1->ppfp && s1->ppfp != stdout)
1227         fclose(s1->ppfp);
1228     if (s1->dffp && s1->dffp != s1->ppfp)
1229         fclose(s1->dffp);
1230
1231     /* free all sections */
1232     for(i = 1; i < s1->nb_sections; i++)
1233         free_section(s1->sections[i]);
1234     dynarray_reset(&s1->sections, &s1->nb_sections);
1235
1236     for(i = 0; i < s1->nb_priv_sections; i++)
1237         free_section(s1->priv_sections[i]);
1238     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1239
1240     /* free any loaded DLLs */
1241 #ifdef TCC_IS_NATIVE
1242     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1243         DLLReference *ref = s1->loaded_dlls[i];
1244         if ( ref->handle )
1245             dlclose(ref->handle);
1246     }
1247 #endif
1248
1249     /* free loaded dlls array */
1250     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1251
1252     /* free library paths */
1253     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1254     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
1255
1256     /* free include paths */
1257     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1258     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1259     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1260
1261     tcc_free(s1->tcc_lib_path);
1262     tcc_free(s1->soname);
1263     tcc_free(s1->rpath);
1264     tcc_free(s1->init_symbol);
1265     tcc_free(s1->fini_symbol);
1266     tcc_free(s1->outfile);
1267     tcc_free(s1->deps_outfile);
1268     dynarray_reset(&s1->files, &s1->nb_files);
1269     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
1270     dynarray_reset(&s1->pragma_libs, &s1->nb_pragma_libs);
1271
1272 #ifdef TCC_IS_NATIVE
1273 # ifdef HAVE_SELINUX
1274     munmap (s1->write_mem, s1->mem_size);
1275     munmap (s1->runtime_mem, s1->mem_size);
1276 # else
1277     tcc_free(s1->runtime_mem);
1278 # endif
1279 #endif
1280
1281     tcc_free(s1->sym_attrs);
1282     tcc_free(s1);
1283     tcc_memstats(bench);
1284 }
1285
1286 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
1287 {
1288     tcc_split_path(s, (void ***)&s->include_paths, &s->nb_include_paths, pathname);
1289     return 0;
1290 }
1291
1292 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
1293 {
1294     tcc_split_path(s, (void ***)&s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
1295     return 0;
1296 }
1297
1298 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags, int filetype)
1299 {
1300     ElfW(Ehdr) ehdr;
1301     int fd, ret, size;
1302
1303     parse_flags = 0;
1304 #ifdef CONFIG_TCC_ASM
1305     /* if .S file, define __ASSEMBLER__ like gcc does */
1306     if ((filetype == TCC_FILETYPE_ASM) || (filetype == TCC_FILETYPE_ASM_PP)) {
1307         tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
1308         parse_flags = PARSE_FLAG_ASM_FILE;
1309     }
1310 #endif
1311
1312     /* open the file */
1313     ret = tcc_open(s1, filename);
1314     if (ret < 0) {
1315         if (flags & AFF_PRINT_ERROR)
1316             tcc_error_noabort("file '%s' not found", filename);
1317         return ret;
1318     }
1319
1320     /* update target deps */
1321     dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1322             tcc_strdup(filename));
1323
1324     if (flags & AFF_PREPROCESS) {
1325         ret = tcc_preprocess(s1);
1326         goto the_end;
1327     }
1328
1329     if (filetype == TCC_FILETYPE_C) {
1330         /* C file assumed */
1331         ret = tcc_compile(s1);
1332         goto the_end;
1333     }
1334
1335 #ifdef CONFIG_TCC_ASM
1336     if (filetype == TCC_FILETYPE_ASM_PP) {
1337         /* non preprocessed assembler */
1338         ret = tcc_assemble(s1, 1);
1339         goto the_end;
1340     }
1341
1342     if (filetype == TCC_FILETYPE_ASM) {
1343         /* preprocessed assembler */
1344         ret = tcc_assemble(s1, 0);
1345         goto the_end;
1346     }
1347 #endif
1348
1349     fd = file->fd;
1350     /* assume executable format: auto guess file type */
1351     size = read(fd, &ehdr, sizeof(ehdr));
1352     lseek(fd, 0, SEEK_SET);
1353     if (size <= 0) {
1354         tcc_error_noabort("could not read header");
1355         goto the_end;
1356     }
1357
1358     if (size == sizeof(ehdr) &&
1359         ehdr.e_ident[0] == ELFMAG0 &&
1360         ehdr.e_ident[1] == ELFMAG1 &&
1361         ehdr.e_ident[2] == ELFMAG2 &&
1362         ehdr.e_ident[3] == ELFMAG3) {
1363
1364         /* do not display line number if error */
1365         file->line_num = 0;
1366         if (ehdr.e_type == ET_REL) {
1367             ret = tcc_load_object_file(s1, fd, 0);
1368             goto the_end;
1369
1370         }
1371 #ifndef TCC_TARGET_PE
1372         if (ehdr.e_type == ET_DYN) {
1373             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1374 #ifdef TCC_IS_NATIVE
1375                 void *h;
1376                 h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1377                 if (h)
1378 #endif
1379                     ret = 0;
1380             } else {
1381                 ret = tcc_load_dll(s1, fd, filename,
1382                                    (flags & AFF_REFERENCED_DLL) != 0);
1383             }
1384             goto the_end;
1385         }
1386 #endif
1387         tcc_error_noabort("unrecognized ELF file");
1388         goto the_end;
1389     }
1390
1391     if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
1392         file->line_num = 0; /* do not display line number if error */
1393         ret = tcc_load_archive(s1, fd);
1394         goto the_end;
1395     }
1396
1397 #ifdef TCC_TARGET_COFF
1398     if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
1399         ret = tcc_load_coff(s1, fd);
1400         goto the_end;
1401     }
1402 #endif
1403
1404 #ifdef TCC_TARGET_PE
1405     ret = pe_load_file(s1, filename, fd);
1406 #else
1407     /* as GNU ld, consider it is an ld script if not recognized */
1408     ret = tcc_load_ldscript(s1);
1409 #endif
1410     if (ret < 0)
1411         tcc_error_noabort("unrecognized file type");
1412
1413 the_end:
1414     tcc_close();
1415     return ret;
1416 }
1417
1418 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename, int filetype)
1419 {
1420     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1421         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS, filetype);
1422     else
1423         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR, filetype);
1424 }
1425
1426 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1427 {
1428     tcc_split_path(s, (void ***)&s->library_paths, &s->nb_library_paths, pathname);
1429     return 0;
1430 }
1431
1432 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1433     const char *filename, int flags, char **paths, int nb_paths)
1434 {
1435     char buf[1024];
1436     int i;
1437
1438     for(i = 0; i < nb_paths; i++) {
1439         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1440         if (tcc_add_file_internal(s, buf, flags, TCC_FILETYPE_BINARY) == 0)
1441             return 0;
1442     }
1443     return -1;
1444 }
1445
1446 #ifndef TCC_TARGET_PE
1447 /* find and load a dll. Return non zero if not found */
1448 /* XXX: add '-rpath' option support ? */
1449 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1450 {
1451     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1452         s->library_paths, s->nb_library_paths);
1453 }
1454 #endif
1455
1456 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename)
1457 {
1458     if (-1 == tcc_add_library_internal(s, "%s/%s",
1459         filename, 0, s->crt_paths, s->nb_crt_paths))
1460         tcc_error_noabort("file '%s' not found", filename);
1461     return 0;
1462 }
1463
1464 /* the library name is the same as the argument of the '-l' option */
1465 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1466 {
1467 #ifdef TCC_TARGET_PE
1468     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1469     const char **pp = s->static_link ? libs + 4 : libs;
1470 #else
1471     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1472     const char **pp = s->static_link ? libs + 1 : libs;
1473 #endif
1474     while (*pp) {
1475         if (0 == tcc_add_library_internal(s, *pp,
1476             libraryname, 0, s->library_paths, s->nb_library_paths))
1477             return 0;
1478         ++pp;
1479     }
1480     return -1;
1481 }
1482
1483 PUB_FUNC int tcc_add_library_err(TCCState *s, const char *libname)
1484 {
1485     int ret = tcc_add_library(s, libname);
1486     if (ret < 0)
1487         tcc_error_noabort("cannot find library 'lib%s'", libname);
1488     return ret;
1489 }
1490
1491 /* habdle #pragma comment(lib,) */
1492 ST_FUNC void tcc_add_pragma_libs(TCCState *s1)
1493 {
1494     int i;
1495     for (i = 0; i < s1->nb_pragma_libs; i++)
1496         tcc_add_library_err(s1, s1->pragma_libs[i]);
1497 }
1498
1499 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1500 {
1501 #ifdef TCC_TARGET_PE
1502     /* On x86_64 'val' might not be reachable with a 32bit offset.
1503        So it is handled here as if it were in a DLL. */
1504     pe_putimport(s, 0, name, (uintptr_t)val);
1505 #else
1506     add_elf_sym(symtab_section, (uintptr_t)val, 0,
1507         ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1508         SHN_ABS, name);
1509 #endif
1510     return 0;
1511 }
1512
1513
1514 /* Windows stat* ( https://msdn.microsoft.com/en-us/library/14h5k7ff.aspx ):
1515  * - st_gid, st_ino, st_uid: only valid on "unix" file systems (not FAT, NTFS, etc)
1516  * - st_atime, st_ctime: not valid on FAT, valid on NTFS.
1517  * - Other fields should be reasonably compatible (and S_ISDIR should work).
1518  *
1519  * BY_HANDLE_FILE_INFORMATION ( https://msdn.microsoft.com/en-us/library/windows/desktop/aa363788%28v=vs.85%29.aspx ):
1520  * - File index (combined nFileIndexHigh and nFileIndexLow) _may_ change when the file is opened.
1521  *   - But on NTFS: it's guaranteed to be the same value until the file is deleted.
1522  * - On windows server 2012 there's a 128b file id, and the 64b one via
1523  *   nFileIndex* is not guaranteed to be unique.
1524  *
1525  * - MS Docs suggest to that volume number with the file index could be used to
1526  *   check if two handles refer to the same file.
1527  */
1528 #ifndef _WIN32
1529 typedef struct stat                file_info_t;
1530 #else
1531 typedef BY_HANDLE_FILE_INFORMATION file_info_t;
1532 #endif
1533
1534 int get_file_info(const char *fname, file_info_t *out_info)
1535 {
1536 #ifndef _WIN32
1537     return stat(fname, out_info);
1538 #else
1539     int rv = 1;
1540     HANDLE h = CreateFile(fname, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,
1541                           FILE_ATTRIBUTE_NORMAL|FILE_FLAG_BACKUP_SEMANTICS, NULL);
1542
1543     if (h != INVALID_HANDLE_VALUE) {
1544         rv = !GetFileInformationByHandle(h, out_info);
1545         CloseHandle(h);
1546     }
1547     return rv;
1548 #endif
1549 }
1550
1551 int is_dir(file_info_t *info)
1552 {
1553 #ifndef _WIN32
1554     return S_ISDIR(info->st_mode);
1555 #else
1556     return (info->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ==
1557            FILE_ATTRIBUTE_DIRECTORY;
1558 #endif
1559 }
1560
1561 int is_same_file(const file_info_t *fi1, const file_info_t *fi2)
1562 {
1563 #ifndef _WIN32
1564     return fi1->st_dev == fi2->st_dev &&
1565            fi1->st_ino == fi2->st_ino;
1566 #else
1567     return fi1->dwVolumeSerialNumber == fi2->dwVolumeSerialNumber &&
1568            fi1->nFileIndexHigh       == fi2->nFileIndexHigh &&
1569            fi1->nFileIndexLow        == fi2->nFileIndexLow;
1570 #endif
1571 }
1572
1573 static void
1574 tcc_normalize_inc_dirs_aux(file_info_t *stats, size_t *pnum, char **path)
1575 {
1576     size_t i, num = *pnum;
1577     if (get_file_info(*path, &stats[num]) || !is_dir(&stats[num]))
1578         goto remove;
1579     for (i = 0; i < num; i++)
1580         if (is_same_file(&stats[i], &stats[num]))
1581             goto remove;
1582     *pnum = num + 1;
1583     return;
1584  remove:
1585     tcc_free(*path);
1586     *path = 0;
1587 }
1588
1589 /* Remove non-existent and duplicate directories from include paths. */
1590 ST_FUNC void tcc_normalize_inc_dirs(TCCState *s)
1591 {
1592     file_info_t *stats =
1593         tcc_malloc(((size_t)s->nb_sysinclude_paths + s->nb_include_paths) *
1594                    sizeof(*stats));
1595     size_t i, num = 0;
1596     for (i = 0; i < s->nb_sysinclude_paths; i++)
1597         tcc_normalize_inc_dirs_aux(stats, &num, &s->sysinclude_paths[i]);
1598     for (i = 0; i < s->nb_include_paths; i++)
1599         tcc_normalize_inc_dirs_aux(stats, &num, &s->include_paths[i]);
1600     tcc_free(stats);
1601 }
1602
1603 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
1604 {
1605     s->output_type = output_type;
1606
1607     if (!s->nostdinc) {
1608         /* default include paths */
1609         /* -isystem paths have already been handled */
1610         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
1611     }
1612
1613     /* if bound checking, then add corresponding sections */
1614 #ifdef CONFIG_TCC_BCHECK
1615     if (s->do_bounds_check) {
1616         /* define symbol */
1617         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1618         /* create bounds sections */
1619         bounds_section = new_section(s, ".bounds",
1620                                      SHT_PROGBITS, SHF_ALLOC);
1621         lbounds_section = new_section(s, ".lbounds",
1622                                       SHT_PROGBITS, SHF_ALLOC);
1623     }
1624 #endif
1625
1626     if (s->char_is_unsigned) {
1627         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
1628     }
1629
1630     /* add debug sections */
1631     if (s->do_debug) {
1632         /* stab symbols */
1633         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
1634         stab_section->sh_entsize = sizeof(Stab_Sym);
1635         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
1636         put_elf_str(stabstr_section, "");
1637         stab_section->link = stabstr_section;
1638         /* put first entry */
1639         put_stabs("", 0, 0, 0, 0);
1640     }
1641
1642     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
1643 #ifdef TCC_TARGET_PE
1644 # ifdef _WIN32
1645     tcc_add_systemdir(s);
1646 # endif
1647 #else
1648     /* add libc crt1/crti objects */
1649     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1650         !s->nostdlib) {
1651         if (output_type != TCC_OUTPUT_DLL)
1652             tcc_add_crt(s, "crt1.o");
1653         tcc_add_crt(s, "crti.o");
1654     }
1655 #endif
1656
1657 #ifdef CONFIG_TCC_BCHECK
1658     if (s->do_bounds_check && (output_type == TCC_OUTPUT_EXE))
1659     {
1660         /* force a bcheck.o linking */
1661         addr_t func = TOK___bound_init;
1662         Sym *sym = external_global_sym(func, &func_old_type, 0);
1663         if (!sym->c)
1664             put_extern_sym(sym, NULL, 0, 0);
1665     }
1666 #endif
1667
1668     if (s->normalize_inc_dirs)
1669         tcc_normalize_inc_dirs(s);
1670     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1671         print_defines();
1672
1673     return 0;
1674 }
1675
1676 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1677 {
1678     tcc_free(s->tcc_lib_path);
1679     s->tcc_lib_path = tcc_strdup(path);
1680 }
1681
1682 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1683 #define FD_INVERT 0x0002 /* invert value before storing */
1684
1685 typedef struct FlagDef {
1686     uint16_t offset;
1687     uint16_t flags;
1688     const char *name;
1689 } FlagDef;
1690
1691 static const FlagDef warning_defs[] = {
1692     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1693     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1694     { offsetof(TCCState, warn_error), 0, "error" },
1695     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1696       "implicit-function-declaration" },
1697 };
1698
1699 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1700                     const char *name, int value)
1701 {
1702     int i;
1703     const FlagDef *p;
1704     const char *r;
1705
1706     r = name;
1707     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
1708         r += 3;
1709         value = !value;
1710     }
1711     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1712         if (!strcmp(r, p->name))
1713             goto found;
1714     }
1715     return -1;
1716  found:
1717     if (p->flags & FD_INVERT)
1718         value = !value;
1719     *(int *)((uint8_t *)s + p->offset) = value;
1720     return 0;
1721 }
1722
1723 /* set/reset a warning */
1724 static int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1725 {
1726     int i;
1727     const FlagDef *p;
1728
1729     if (!strcmp(warning_name, "all")) {
1730         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1731             if (p->flags & WD_ALL)
1732                 *(int *)((uint8_t *)s + p->offset) = 1;
1733         }
1734         return 0;
1735     } else {
1736         return set_flag(s, warning_defs, countof(warning_defs),
1737                         warning_name, value);
1738     }
1739 }
1740
1741 static const FlagDef flag_defs[] = {
1742     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1743     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1744     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1745     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1746     { offsetof(TCCState, ms_extensions), 0, "ms-extensions" },
1747     { offsetof(TCCState, old_struct_init_code), 0, "old-struct-init-code" },
1748     { offsetof(TCCState, dollars_in_identifiers), 0, "dollars-in-identifiers" },
1749     { offsetof(TCCState, normalize_inc_dirs), 0, "normalize-inc-dirs" },
1750 };
1751
1752 /* set/reset a flag */
1753 static int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1754 {
1755     return set_flag(s, flag_defs, countof(flag_defs),
1756                     flag_name, value);
1757 }
1758
1759
1760 static int strstart(const char *val, const char **str)
1761 {
1762     const char *p, *q;
1763     p = *str;
1764     q = val;
1765     while (*q) {
1766         if (*p != *q)
1767             return 0;
1768         p++;
1769         q++;
1770     }
1771     *str = p;
1772     return 1;
1773 }
1774
1775 /* Like strstart, but automatically takes into account that ld options can
1776  *
1777  * - start with double or single dash (e.g. '--soname' or '-soname')
1778  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1779  *   or '-Wl,-soname=x.so')
1780  *
1781  * you provide `val` always in 'option[=]' form (no leading -)
1782  */
1783 static int link_option(const char *str, const char *val, const char **ptr)
1784 {
1785     const char *p, *q;
1786
1787     /* there should be 1 or 2 dashes */
1788     if (*str++ != '-')
1789         return 0;
1790     if (*str == '-')
1791         str++;
1792
1793     /* then str & val should match (potentialy up to '=') */
1794     p = str;
1795     q = val;
1796
1797     while (*q != '\0' && *q != '=') {
1798         if (*p != *q)
1799             return 0;
1800         p++;
1801         q++;
1802     }
1803
1804     /* '=' near eos means ',' or '=' is ok */
1805     if (*q == '=') {
1806         if (*p != ',' && *p != '=')
1807             return 0;
1808         p++;
1809         q++;
1810     }
1811
1812     if (ptr)
1813         *ptr = p;
1814     return 1;
1815 }
1816
1817 static const char *skip_linker_arg(const char **str)
1818 {
1819     const char *s1 = *str;
1820     const char *s2 = strchr(s1, ',');
1821     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1822     return s2;
1823 }
1824
1825 static char *copy_linker_arg(const char *p)
1826 {
1827     const char *q = p;
1828     skip_linker_arg(&q);
1829     return pstrncpy(tcc_malloc(q - p + 1), p, q - p);
1830 }
1831
1832 /* set linker options */
1833 static int tcc_set_linker(TCCState *s, const char *option)
1834 {
1835     while (option && *option) {
1836
1837         const char *p = option;
1838         char *end = NULL;
1839         int ignoring = 0;
1840
1841         if (link_option(option, "Bsymbolic", &p)) {
1842             s->symbolic = 1;
1843         } else if (link_option(option, "nostdlib", &p)) {
1844             s->nostdlib = 1;
1845         } else if (link_option(option, "fini=", &p)) {
1846             s->fini_symbol = copy_linker_arg(p);
1847             ignoring = 1;
1848         } else if (link_option(option, "image-base=", &p)
1849                 || link_option(option, "Ttext=", &p)) {
1850             s->text_addr = strtoull(p, &end, 16);
1851             s->has_text_addr = 1;
1852         } else if (link_option(option, "init=", &p)) {
1853             s->init_symbol = copy_linker_arg(p);
1854             ignoring = 1;
1855         } else if (link_option(option, "oformat=", &p)) {
1856 #if defined(TCC_TARGET_PE)
1857             if (strstart("pe-", &p)) {
1858 #elif defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1859             if (strstart("elf64-", &p)) {
1860 #else
1861             if (strstart("elf32-", &p)) {
1862 #endif
1863                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1864             } else if (!strcmp(p, "binary")) {
1865                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1866 #ifdef TCC_TARGET_COFF
1867             } else if (!strcmp(p, "coff")) {
1868                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1869 #endif
1870             } else
1871                 goto err;
1872
1873         } else if (link_option(option, "as-needed", &p)) {
1874             ignoring = 1;
1875         } else if (link_option(option, "O", &p)) {
1876             ignoring = 1;
1877         } else if (link_option(option, "rpath=", &p)) {
1878             s->rpath = copy_linker_arg(p);
1879         } else if (link_option(option, "section-alignment=", &p)) {
1880             s->section_align = strtoul(p, &end, 16);
1881         } else if (link_option(option, "soname=", &p)) {
1882             s->soname = copy_linker_arg(p);
1883 #ifdef TCC_TARGET_PE
1884         } else if (link_option(option, "file-alignment=", &p)) {
1885             s->pe_file_align = strtoul(p, &end, 16);
1886         } else if (link_option(option, "stack=", &p)) {
1887             s->pe_stack_size = strtoul(p, &end, 10);
1888         } else if (link_option(option, "subsystem=", &p)) {
1889 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1890             if (!strcmp(p, "native")) {
1891                 s->pe_subsystem = 1;
1892             } else if (!strcmp(p, "console")) {
1893                 s->pe_subsystem = 3;
1894             } else if (!strcmp(p, "gui")) {
1895                 s->pe_subsystem = 2;
1896             } else if (!strcmp(p, "posix")) {
1897                 s->pe_subsystem = 7;
1898             } else if (!strcmp(p, "efiapp")) {
1899                 s->pe_subsystem = 10;
1900             } else if (!strcmp(p, "efiboot")) {
1901                 s->pe_subsystem = 11;
1902             } else if (!strcmp(p, "efiruntime")) {
1903                 s->pe_subsystem = 12;
1904             } else if (!strcmp(p, "efirom")) {
1905                 s->pe_subsystem = 13;
1906 #elif defined(TCC_TARGET_ARM)
1907             if (!strcmp(p, "wince")) {
1908                 s->pe_subsystem = 9;
1909 #endif
1910             } else
1911                 goto err;
1912 #endif
1913         } else
1914             goto err;
1915
1916         if (ignoring && s->warn_unsupported) err: {
1917             char buf[100], *e;
1918             pstrcpy(buf, sizeof buf, e = copy_linker_arg(option)), tcc_free(e);
1919             if (ignoring)
1920                 tcc_warning("unsupported linker option '%s'", buf);
1921             else
1922                 tcc_error("unsupported linker option '%s'", buf);
1923         }
1924         option = skip_linker_arg(&p);
1925     }
1926     return 0;
1927 }
1928
1929 typedef struct TCCOption {
1930     const char *name;
1931     uint16_t index;
1932     uint16_t flags;
1933 } TCCOption;
1934
1935 enum {
1936     TCC_OPTION_HELP,
1937     TCC_OPTION_I,
1938     TCC_OPTION_D,
1939     TCC_OPTION_U,
1940     TCC_OPTION_P,
1941     TCC_OPTION_L,
1942     TCC_OPTION_B,
1943     TCC_OPTION_l,
1944     TCC_OPTION_bench,
1945     TCC_OPTION_bt,
1946     TCC_OPTION_b,
1947     TCC_OPTION_g,
1948     TCC_OPTION_c,
1949     TCC_OPTION_dumpversion,
1950     TCC_OPTION_d,
1951     TCC_OPTION_float_abi,
1952     TCC_OPTION_static,
1953     TCC_OPTION_std,
1954     TCC_OPTION_shared,
1955     TCC_OPTION_soname,
1956     TCC_OPTION_o,
1957     TCC_OPTION_r,
1958     TCC_OPTION_s,
1959     TCC_OPTION_traditional,
1960     TCC_OPTION_Wl,
1961     TCC_OPTION_W,
1962     TCC_OPTION_O,
1963     TCC_OPTION_m,
1964     TCC_OPTION_f,
1965     TCC_OPTION_isystem,
1966     TCC_OPTION_iwithprefix,
1967     TCC_OPTION_nostdinc,
1968     TCC_OPTION_nostdlib,
1969     TCC_OPTION_print_search_dirs,
1970     TCC_OPTION_rdynamic,
1971     TCC_OPTION_pedantic,
1972     TCC_OPTION_pthread,
1973     TCC_OPTION_run,
1974     TCC_OPTION_v,
1975     TCC_OPTION_w,
1976     TCC_OPTION_pipe,
1977     TCC_OPTION_E,
1978     TCC_OPTION_MD,
1979     TCC_OPTION_MF,
1980     TCC_OPTION_x
1981 };
1982
1983 #define TCC_OPTION_HAS_ARG 0x0001
1984 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1985
1986 static const TCCOption tcc_options[] = {
1987     { "h", TCC_OPTION_HELP, 0 },
1988     { "-help", TCC_OPTION_HELP, 0 },
1989     { "?", TCC_OPTION_HELP, 0 },
1990     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1991     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1992     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1993     { "P", TCC_OPTION_P, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1994     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1995     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1996     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1997     { "bench", TCC_OPTION_bench, 0 },
1998 #ifdef CONFIG_TCC_BACKTRACE
1999     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
2000 #endif
2001 #ifdef CONFIG_TCC_BCHECK
2002     { "b", TCC_OPTION_b, 0 },
2003 #endif
2004     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2005     { "c", TCC_OPTION_c, 0 },
2006     { "dumpversion", TCC_OPTION_dumpversion, 0},
2007     { "d", TCC_OPTION_d, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2008 #ifdef TCC_TARGET_ARM
2009     { "mfloat-abi", TCC_OPTION_float_abi, TCC_OPTION_HAS_ARG },
2010 #endif
2011     { "static", TCC_OPTION_static, 0 },
2012     { "std", TCC_OPTION_std, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2013     { "shared", TCC_OPTION_shared, 0 },
2014     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
2015     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
2016     { "pedantic", TCC_OPTION_pedantic, 0},
2017     { "pthread", TCC_OPTION_pthread, 0},
2018     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2019     { "rdynamic", TCC_OPTION_rdynamic, 0 },
2020     { "r", TCC_OPTION_r, 0 },
2021     { "s", TCC_OPTION_s, 0 },
2022     { "traditional", TCC_OPTION_traditional, 0 },
2023     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2024     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2025     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2026     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG },
2027     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2028     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
2029     { "iwithprefix", TCC_OPTION_iwithprefix, TCC_OPTION_HAS_ARG },
2030     { "nostdinc", TCC_OPTION_nostdinc, 0 },
2031     { "nostdlib", TCC_OPTION_nostdlib, 0 },
2032     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
2033     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
2034     { "w", TCC_OPTION_w, 0 },
2035     { "pipe", TCC_OPTION_pipe, 0},
2036     { "E", TCC_OPTION_E, 0},
2037     { "MD", TCC_OPTION_MD, 0},
2038     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
2039     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
2040     { NULL, 0, 0 },
2041 };
2042
2043 static void parse_option_D(TCCState *s1, const char *optarg)
2044 {
2045     char *sym = tcc_strdup(optarg);
2046     char *value = strchr(sym, '=');
2047     if (value)
2048         *value++ = '\0';
2049     tcc_define_symbol(s1, sym, value);
2050     tcc_free(sym);
2051 }
2052
2053 static void args_parser_add_file(TCCState *s, const char* filename, int filetype)
2054 {
2055     int len = strlen(filename);
2056     char *p = tcc_malloc(len + 2);
2057     if (filetype) {
2058         *p = filetype;
2059     }
2060     else {
2061         /* use a file extension to detect a filetype */
2062         const char *ext = tcc_fileextension(filename);
2063         if (ext[0]) {
2064             ext++;
2065             if (!strcmp(ext, "S"))
2066                 *p = TCC_FILETYPE_ASM_PP;
2067             else
2068             if (!strcmp(ext, "s"))
2069                 *p = TCC_FILETYPE_ASM;
2070             else
2071             if (!PATHCMP(ext, "c") || !PATHCMP(ext, "i"))
2072                 *p = TCC_FILETYPE_C;
2073             else
2074                 *p = TCC_FILETYPE_BINARY;
2075         }
2076         else {
2077             *p = TCC_FILETYPE_C;
2078         }
2079     }
2080     strcpy(p+1, filename);
2081     dynarray_add((void ***)&s->files, &s->nb_files, p);
2082 }
2083
2084 PUB_FUNC int tcc_parse_args(TCCState *s, int argc, char **argv)
2085 {
2086     const TCCOption *popt;
2087     const char *optarg, *r;
2088     int run = 0;
2089     int pthread = 0;
2090     int optind = 0;
2091     int filetype = 0;
2092
2093     /* collect -Wl options for input such as "-Wl,-rpath -Wl,<path>" */
2094     CString linker_arg;
2095     cstr_new(&linker_arg);
2096
2097     while (optind < argc) {
2098
2099         r = argv[optind++];
2100         if (r[0] != '-' || r[1] == '\0') {
2101             args_parser_add_file(s, r, filetype);
2102             if (run) {
2103                 optind--;
2104                 /* argv[0] will be this file */
2105                 break;
2106             }
2107             continue;
2108         }
2109
2110         /* find option in table */
2111         for(popt = tcc_options; ; ++popt) {
2112             const char *p1 = popt->name;
2113             const char *r1 = r + 1;
2114             if (p1 == NULL)
2115                 tcc_error("invalid option -- '%s'", r);
2116             if (!strstart(p1, &r1))
2117                 continue;
2118             optarg = r1;
2119             if (popt->flags & TCC_OPTION_HAS_ARG) {
2120                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
2121                     if (optind >= argc)
2122                         tcc_error("argument to '%s' is missing", r);
2123                     optarg = argv[optind++];
2124                 }
2125             } else if (*r1 != '\0')
2126                 continue;
2127             break;
2128         }
2129
2130         switch(popt->index) {
2131         case TCC_OPTION_HELP:
2132             return 0;
2133         case TCC_OPTION_I:
2134             tcc_add_include_path(s, optarg);
2135             break;
2136         case TCC_OPTION_D:
2137             parse_option_D(s, optarg);
2138             break;
2139         case TCC_OPTION_U:
2140             tcc_undefine_symbol(s, optarg);
2141             break;
2142         case TCC_OPTION_L:
2143             tcc_add_library_path(s, optarg);
2144             break;
2145         case TCC_OPTION_B:
2146             /* set tcc utilities path (mainly for tcc development) */
2147             tcc_set_lib_path(s, optarg);
2148             break;
2149         case TCC_OPTION_l:
2150             args_parser_add_file(s, r, TCC_FILETYPE_BINARY);
2151             s->nb_libraries++;
2152             break;
2153         case TCC_OPTION_pthread:
2154             parse_option_D(s, "_REENTRANT");
2155             pthread = 1;
2156             break;
2157         case TCC_OPTION_bench:
2158             s->do_bench = 1;
2159             break;
2160 #ifdef CONFIG_TCC_BACKTRACE
2161         case TCC_OPTION_bt:
2162             tcc_set_num_callers(atoi(optarg));
2163             break;
2164 #endif
2165 #ifdef CONFIG_TCC_BCHECK
2166         case TCC_OPTION_b:
2167             s->do_bounds_check = 1;
2168             s->do_debug = 1;
2169             break;
2170 #endif
2171         case TCC_OPTION_g:
2172             s->do_debug = 1;
2173             break;
2174         case TCC_OPTION_c:
2175             if (s->output_type)
2176                 tcc_warning("-c: some compiler action already specified (%d)", s->output_type);
2177             s->output_type = TCC_OUTPUT_OBJ;
2178             break;
2179         case TCC_OPTION_d:
2180             if (*optarg == 'D' || *optarg == 'M')
2181                 s->dflag = *optarg;
2182             else {
2183                 if (s->warn_unsupported)
2184                     goto unsupported_option;
2185                 tcc_error("invalid option -- '%s'", r);
2186             }
2187             break;
2188 #ifdef TCC_TARGET_ARM
2189         case TCC_OPTION_float_abi:
2190             /* tcc doesn't support soft float yet */
2191             if (!strcmp(optarg, "softfp")) {
2192                 s->float_abi = ARM_SOFTFP_FLOAT;
2193                 tcc_undefine_symbol(s, "__ARM_PCS_VFP");
2194             } else if (!strcmp(optarg, "hard"))
2195                 s->float_abi = ARM_HARD_FLOAT;
2196             else
2197                 tcc_error("unsupported float abi '%s'", optarg);
2198             break;
2199 #endif
2200         case TCC_OPTION_static:
2201             s->static_link = 1;
2202             break;
2203         case TCC_OPTION_std:
2204             /* silently ignore, a current purpose:
2205                allow to use a tcc as a reference compiler for "make test" */
2206             break;
2207         case TCC_OPTION_shared:
2208             if (s->output_type)
2209                 tcc_warning("-shared: some compiler action already specified (%d)", s->output_type);
2210             s->output_type = TCC_OUTPUT_DLL;
2211             break;
2212         case TCC_OPTION_soname:
2213             s->soname = tcc_strdup(optarg);
2214             break;
2215         case TCC_OPTION_m:
2216             s->option_m = tcc_strdup(optarg);
2217             break;
2218         case TCC_OPTION_o:
2219             if (s->outfile) {
2220                 tcc_warning("multiple -o option");
2221                 tcc_free(s->outfile);
2222             }
2223             s->outfile = tcc_strdup(optarg);
2224             break;
2225         case TCC_OPTION_r:
2226             /* generate a .o merging several output files */
2227             if (s->output_type)
2228                 tcc_warning("-r: some compiler action already specified (%d)", s->output_type);
2229             s->option_r = 1;
2230             s->output_type = TCC_OUTPUT_OBJ;
2231             break;
2232         case TCC_OPTION_isystem:
2233             tcc_add_sysinclude_path(s, optarg);
2234             break;
2235         case TCC_OPTION_iwithprefix:
2236             if (1) {
2237                 char buf[1024];
2238                 int buf_size = sizeof(buf)-1;
2239                 char *p = &buf[0];
2240
2241                 char *sysroot = "{B}/";
2242                 int len = strlen(sysroot);
2243                 if (len > buf_size)
2244                     len = buf_size;
2245                 strncpy(p, sysroot, len);
2246                 p += len;
2247                 buf_size -= len;
2248
2249                 len = strlen(optarg);
2250                 if (len > buf_size)
2251                     len = buf_size;
2252                 strncpy(p, optarg, len+1);
2253                 tcc_add_sysinclude_path(s, buf);
2254             }
2255             break;
2256         case TCC_OPTION_nostdinc:
2257             s->nostdinc = 1;
2258             break;
2259         case TCC_OPTION_nostdlib:
2260             s->nostdlib = 1;
2261             break;
2262         case TCC_OPTION_print_search_dirs:
2263             s->print_search_dirs = 1;
2264             break;
2265         case TCC_OPTION_run:
2266             if (s->output_type)
2267                 tcc_warning("-run: some compiler action already specified (%d)", s->output_type);
2268             s->output_type = TCC_OUTPUT_MEMORY;
2269             tcc_set_options(s, optarg);
2270             run = 1;
2271             break;
2272         case TCC_OPTION_v:
2273             do ++s->verbose; while (*optarg++ == 'v');
2274             break;
2275         case TCC_OPTION_f:
2276             if (tcc_set_flag(s, optarg, 1) < 0 && s->warn_unsupported)
2277                 goto unsupported_option;
2278             break;
2279         case TCC_OPTION_W:
2280             if (tcc_set_warning(s, optarg, 1) < 0 &&
2281                 s->warn_unsupported)
2282                 goto unsupported_option;
2283             break;
2284         case TCC_OPTION_w:
2285             s->warn_none = 1;
2286             break;
2287         case TCC_OPTION_rdynamic:
2288             s->rdynamic = 1;
2289             break;
2290         case TCC_OPTION_Wl:
2291             if (linker_arg.size)
2292                 --linker_arg.size, cstr_ccat(&linker_arg, ',');
2293             cstr_cat(&linker_arg, optarg);
2294             cstr_ccat(&linker_arg, '\0');
2295             break;
2296         case TCC_OPTION_E:
2297             if (s->output_type)
2298                 tcc_warning("-E: some compiler action already specified (%d)", s->output_type);
2299             s->output_type = TCC_OUTPUT_PREPROCESS;
2300             break;
2301         case TCC_OPTION_P:
2302             s->Pflag = atoi(optarg) + 1;
2303             break;
2304         case TCC_OPTION_MD:
2305             s->gen_deps = 1;
2306             break;
2307         case TCC_OPTION_MF:
2308             s->deps_outfile = tcc_strdup(optarg);
2309             break;
2310         case TCC_OPTION_dumpversion:
2311             printf ("%s\n", TCC_VERSION);
2312             exit(0);
2313         case TCC_OPTION_s:
2314             s->do_strip = 1;
2315             break;
2316         case TCC_OPTION_traditional:
2317             break;
2318         case TCC_OPTION_x:
2319             if (*optarg == 'c')
2320                 filetype = TCC_FILETYPE_C;
2321             else
2322             if (*optarg == 'a')
2323                 filetype = TCC_FILETYPE_ASM_PP;
2324             else
2325             if (*optarg == 'n')
2326                 filetype = 0;
2327             else
2328                 tcc_warning("unsupported language '%s'", optarg);
2329             break;
2330         case TCC_OPTION_O:
2331             if (1) {
2332                 int opt = atoi(optarg);
2333                 char *sym = "__OPTIMIZE__";
2334                 if (opt)
2335                     tcc_define_symbol(s, sym, 0);
2336                 else
2337                     tcc_undefine_symbol(s, sym);
2338             }
2339             break;
2340         case TCC_OPTION_pedantic:
2341         case TCC_OPTION_pipe:
2342             /* ignored */
2343             break;
2344         default:
2345             if (s->warn_unsupported) {
2346             unsupported_option:
2347                 tcc_warning("unsupported option '%s'", r);
2348             }
2349             break;
2350         }
2351     }
2352
2353     if (s->output_type == 0)
2354         s->output_type = TCC_OUTPUT_EXE;
2355
2356     if (pthread && s->output_type != TCC_OUTPUT_OBJ)
2357         tcc_set_options(s, "-lpthread");
2358
2359     if (s->output_type == TCC_OUTPUT_EXE)
2360         tcc_set_linker(s, (const char *)linker_arg.data);
2361     cstr_free(&linker_arg);
2362
2363     return optind;
2364 }
2365
2366 LIBTCCAPI int tcc_set_options(TCCState *s, const char *str)
2367 {
2368     const char *s1;
2369     char **argv, *arg;
2370     int argc, len;
2371     int ret;
2372
2373     argc = 0, argv = NULL;
2374     for(;;) {
2375         while (is_space(*str))
2376             str++;
2377         if (*str == '\0')
2378             break;
2379         s1 = str;
2380         while (*str != '\0' && !is_space(*str))
2381             str++;
2382         len = str - s1;
2383         arg = tcc_malloc(len + 1);
2384         pstrncpy(arg, s1, len);
2385         dynarray_add((void ***)&argv, &argc, arg);
2386     }
2387     ret = tcc_parse_args(s, argc, argv);
2388     dynarray_reset(&argv, &argc);
2389     return ret;
2390 }
2391
2392 PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time)
2393 {
2394     double tt;
2395     tt = (double)total_time / 1000000.0;
2396     if (tt < 0.001)
2397         tt = 0.001;
2398     if (total_bytes < 1)
2399         total_bytes = 1;
2400     fprintf(stderr, "%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
2401            tok_ident - TOK_IDENT, total_lines, total_bytes,
2402            tt, (int)(total_lines / tt),
2403            total_bytes / tt / 1000000.0);
2404 }
2405
2406 PUB_FUNC void tcc_set_environment(TCCState *s)
2407 {
2408     char * path;
2409
2410     path = getenv("C_INCLUDE_PATH");
2411     if(path != NULL) {
2412         tcc_add_include_path(s, path);
2413     }
2414     path = getenv("CPATH");
2415     if(path != NULL) {
2416         tcc_add_include_path(s, path);
2417     }
2418     path = getenv("LIBRARY_PATH");
2419     if(path != NULL) {
2420         tcc_add_library_path(s, path);
2421     }
2422 }