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 #if defined TCC_IS_NATIVE
 120 static void dlclose(void *p)
 121 {
 122     FreeLibrary((HMODULE)p);
 123 }
 124 #endif
 125
 126 #ifdef LIBTCC_AS_DLL
 127 BOOL WINAPI DllMain (HINSTANCE hDll, DWORD dwReason, LPVOID lpReserved)
 128 {
 129     if (DLL_PROCESS_ATTACH == dwReason)
 130         tcc_module = hDll;
 131     return TRUE;
 132 }
 133 #endif
 134 #endif
 135
 136 /********************************************************/
 137 /* copy a string and truncate it. */
 138 PUB_FUNC char *pstrcpy(char *buf, int buf_size, const char *s)
 139 {
 140     char *q, *q_end;
 141     int c;
 142
 143     if (buf_size > 0) {
 144         q = buf;
 145         q_end = buf + buf_size - 1;
 146         while (q < q_end) {
 147             c = *s++;
 148             if (c == '\0')
 149                 break;
 150             *q++ = c;
 151         }
 152         *q = '\0';
 153     }
 154     return buf;
 155 }
 156
 157 /* strcat and truncate. */
 158 PUB_FUNC char *pstrcat(char *buf, int buf_size, const char *s)
 159 {
 160     int len;
 161     len = strlen(buf);
 162     if (len < buf_size)
 163         pstrcpy(buf + len, buf_size - len, s);
 164     return buf;
 165 }
 166
 167 PUB_FUNC char *pstrncpy(char *out, const char *in, size_t num)
 168 {
 169     memcpy(out, in, num);
 170     out[num] = '\0';
 171     return out;
 172 }
 173
 174 /* extract the basename of a file */
 175 PUB_FUNC char *tcc_basename(const char *name)
 176 {
 177     char *p = strchr(name, 0);
 178     while (p > name && !IS_DIRSEP(p[-1]))
 179         --p;
 180     return p;
 181 }
 182
 183 /* extract extension part of a file
 184  *
 185  * (if no extension, return pointer to end-of-string)
 186  */
 187 PUB_FUNC char *tcc_fileextension (const char *name)
 188 {
 189     char *b = tcc_basename(name);
 190     char *e = strrchr(b, '.');
 191     return e ? e : strchr(b, 0);
 192 }
 193
 194 /********************************************************/
 195 /* memory management */
 196
 197 #undef free
 198 #undef malloc
 199 #undef realloc
 200
 201 #ifndef MEM_DEBUG
 202
 203 PUB_FUNC void tcc_free(void *ptr)
 204 {
 205     free(ptr);
 206 }
 207
 208 PUB_FUNC void *tcc_malloc(unsigned long size)
 209 {
 210     void *ptr;
 211     ptr = malloc(size);
 212     if (!ptr && size)
 213         tcc_error("memory full (malloc)");
 214     return ptr;
 215 }
 216
 217 PUB_FUNC void *tcc_mallocz(unsigned long size)
 218 {
 219     void *ptr;
 220     ptr = tcc_malloc(size);
 221     memset(ptr, 0, size);
 222     return ptr;
 223 }
 224
 225 PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
 226 {
 227     void *ptr1;
 228     ptr1 = realloc(ptr, size);
 229     if (!ptr1 && size)
 230         tcc_error("memory full (realloc)");
 231     return ptr1;
 232 }
 233
 234 PUB_FUNC char *tcc_strdup(const char *str)
 235 {
 236     char *ptr;
 237     ptr = tcc_malloc(strlen(str) + 1);
 238     strcpy(ptr, str);
 239     return ptr;
 240 }
 241
 242 PUB_FUNC void tcc_memstats(int bench)
 243 {
 244 }
 245
 246 #else
 247
 248 #define MEM_DEBUG_MAGIC1 0xFEEDDEB1
 249 #define MEM_DEBUG_MAGIC2 0xFEEDDEB2
 250 #define MEM_DEBUG_FILE_LEN 15
 251
 252 struct mem_debug_header {
 253     size_t      magic1;
 254     size_t      size;
 255     struct mem_debug_header *prev;
 256     struct mem_debug_header *next;
 257     size_t      line_num;
 258     char        file_name[MEM_DEBUG_FILE_LEN + 1];
 259     size_t      magic2;
 260 };
 261
 262 typedef struct mem_debug_header mem_debug_header_t;
 263
 264 static mem_debug_header_t *mem_debug_chain;
 265 static size_t mem_cur_size;
 266 static size_t mem_max_size;
 267
 268 PUB_FUNC void *tcc_malloc_debug(unsigned long size, const char *file, int line)
 269 {
 270     void *ptr;
 271     int ofs;
 272
 273     mem_debug_header_t *header;
 274
 275     ptr = malloc(sizeof(mem_debug_header_t) + size);
 276     if (!ptr)
 277         tcc_error("memory full (malloc)");
 278
 279     mem_cur_size += size;
 280     if (mem_cur_size > mem_max_size)
 281         mem_max_size = mem_cur_size;
 282
 283     header = (mem_debug_header_t *)ptr;
 284
 285     header->magic1 = MEM_DEBUG_MAGIC1;
 286     header->magic2 = MEM_DEBUG_MAGIC2;
 287     header->size = size;
 288     header->line_num = line;
 289
 290     ofs = strlen(file) - MEM_DEBUG_FILE_LEN;
 291     strncpy(header->file_name, file + (ofs > 0 ? ofs : 0), MEM_DEBUG_FILE_LEN);
 292     header->file_name[MEM_DEBUG_FILE_LEN] = 0;
 293
 294     header->next = mem_debug_chain;
 295     header->prev = NULL;
 296
 297     if (header->next)
 298         header->next->prev = header;
 299
 300     mem_debug_chain = header;
 301
 302     ptr = (char *)ptr + sizeof(mem_debug_header_t);
 303     return ptr;
 304 }
 305
 306 PUB_FUNC void tcc_free_debug(void *ptr)
 307 {
 308     mem_debug_header_t *header;
 309
 310     if (!ptr)
 311         return;
 312
 313     ptr = (char *)ptr - sizeof(mem_debug_header_t);
 314     header = (mem_debug_header_t *)ptr;
 315     if (header->magic1 != MEM_DEBUG_MAGIC1 ||
 316         header->magic2 != MEM_DEBUG_MAGIC2 ||
 317         header->size == (size_t)-1 )
 318     {
 319         tcc_error("tcc_free check failed");
 320     }
 321
 322     mem_cur_size -= header->size;
 323     header->size = (size_t)-1;
 324
 325     if (header->next)
 326         header->next->prev = header->prev;
 327
 328     if (header->prev)
 329         header->prev->next = header->next;
 330
 331     if (header == mem_debug_chain)
 332         mem_debug_chain = header->next;
 333
 334     free(ptr);
 335 }
 336
 337
 338 PUB_FUNC void *tcc_mallocz_debug(unsigned long size, const char *file, int line)
 339 {
 340     void *ptr;
 341     ptr = tcc_malloc_debug(size,file,line);
 342     memset(ptr, 0, size);
 343     return ptr;
 344 }
 345
 346 PUB_FUNC void *tcc_realloc_debug(void *ptr, unsigned long size, const char *file, int line)
 347 {
 348     mem_debug_header_t *header;
 349     int mem_debug_chain_update = 0;
 350
 351     if (!ptr) {
 352         ptr = tcc_malloc_debug(size, file, line);
 353         return ptr;
 354     }
 355
 356     ptr = (char *)ptr - sizeof(mem_debug_header_t);
 357     header = (mem_debug_header_t *)ptr;
 358     if (header->magic1 != MEM_DEBUG_MAGIC1 ||
 359         header->magic2 != MEM_DEBUG_MAGIC2 ||
 360         header->size == (size_t)-1 )
 361     {
 362         check_error:
 363             tcc_error("tcc_realloc check failed");
 364     }
 365
 366     mem_debug_chain_update = (header == mem_debug_chain);
 367
 368     mem_cur_size -= header->size;
 369     ptr = realloc(ptr, sizeof(mem_debug_header_t) + size);
 370     if (!ptr)
 371         tcc_error("memory full (realloc)");
 372
 373     header = (mem_debug_header_t *)ptr;
 374     if (header->magic1 != MEM_DEBUG_MAGIC1 ||
 375         header->magic2 != MEM_DEBUG_MAGIC2)
 376     {
 377         goto check_error;
 378     }
 379
 380     mem_cur_size += size;
 381     if (mem_cur_size > mem_max_size)
 382         mem_max_size = mem_cur_size;
 383
 384     header->size = size;
 385     if (header->next)
 386         header->next->prev = header;
 387
 388     if (header->prev)
 389         header->prev->next = header;
 390
 391     if (mem_debug_chain_update)
 392         mem_debug_chain = header;
 393
 394     ptr = (char *)ptr + sizeof(mem_debug_header_t);
 395     return ptr;
 396 }
 397
 398 PUB_FUNC char *tcc_strdup_debug(const char *str, const char *file, int line)
 399 {
 400     char *ptr;
 401     ptr = tcc_malloc_debug(strlen(str) + 1, file, line);
 402     strcpy(ptr, str);
 403     return ptr;
 404 }
 405
 406 PUB_FUNC void tcc_memstats(int bench)
 407 {
 408     if (mem_cur_size) {
 409         mem_debug_header_t *header = mem_debug_chain;
 410
 411         fprintf(stderr, "MEM_DEBUG: mem_leak= %d bytes, mem_max_size= %d bytes\n",
 412             mem_cur_size, mem_max_size);
 413
 414         while (header) {
 415             fprintf(stderr, "%s:%u: error: %u bytes leaked\n",
 416                 header->file_name, header->line_num, header->size);
 417             header = header->next;
 418         }
 419     }
 420     else if (bench)
 421         fprintf(stderr, "mem_max_size= %d bytes\n", mem_max_size);
 422 }
 423
 424 #undef MEM_DEBUG_MAGIC1
 425 #undef MEM_DEBUG_MAGIC2
 426 #undef MEM_DEBUG_FILE_LEN
 427
 428 #endif
 429
 430 #define free(p) use_tcc_free(p)
 431 #define malloc(s) use_tcc_malloc(s)
 432 #define realloc(p, s) use_tcc_realloc(p, s)
 433
 434 /********************************************************/
 435 /* dynarrays */
 436
 437 ST_FUNC void dynarray_add(void ***ptab, int *nb_ptr, void *data)
 438 {
 439     int nb, nb_alloc;
 440     void **pp;
 441
 442     nb = *nb_ptr;
 443     pp = *ptab;
 444     /* every power of two we double array size */
 445     if ((nb & (nb - 1)) == 0) {
 446         if (!nb)
 447             nb_alloc = 1;
 448         else
 449             nb_alloc = nb * 2;
 450         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 451         *ptab = pp;
 452     }
 453     pp[nb++] = data;
 454     *nb_ptr = nb;
 455 }
 456
 457 ST_FUNC void dynarray_reset(void *pp, int *n)
 458 {
 459     void **p;
 460     for (p = *(void***)pp; *n; ++p, --*n)
 461         if (*p)
 462             tcc_free(*p);
 463     tcc_free(*(void**)pp);
 464     *(void**)pp = NULL;
 465 }
 466
 467 static void tcc_split_path(TCCState *s, void ***p_ary, int *p_nb_ary, const char *in)
 468 {
 469     const char *p;
 470     do {
 471         int c;
 472         CString str;
 473
 474         cstr_new(&str);
 475         for (p = in; c = *p, c != '\0' && c != PATHSEP; ++p) {
 476             if (c == '{' && p[1] && p[2] == '}') {
 477                 c = p[1], p += 2;
 478                 if (c == 'B')
 479                     cstr_cat(&str, s->tcc_lib_path, -1);
 480             } else {
 481                 cstr_ccat(&str, c);
 482             }
 483         }
 484         if (str.size) {
 485             cstr_ccat(&str, '\0');
 486             dynarray_add(p_ary, p_nb_ary, tcc_strdup(str.data));
 487         }
 488         cstr_free(&str);
 489         in = p+1;
 490     } while (*p);
 491 }
 492
 493 /********************************************************/
 494
 495 ST_FUNC Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags)
 496 {
 497     Section *sec;
 498
 499     sec = tcc_mallocz(sizeof(Section) + strlen(name));
 500     strcpy(sec->name, name);
 501     sec->sh_type = sh_type;
 502     sec->sh_flags = sh_flags;
 503     switch(sh_type) {
 504     case SHT_HASH:
 505     case SHT_REL:
 506     case SHT_RELA:
 507     case SHT_DYNSYM:
 508     case SHT_SYMTAB:
 509     case SHT_DYNAMIC:
 510         sec->sh_addralign = 4;
 511         break;
 512     case SHT_STRTAB:
 513         sec->sh_addralign = 1;
 514         break;
 515     default:
 516         sec->sh_addralign =  PTR_SIZE; /* gcc/pcc default aligment */
 517         break;
 518     }
 519
 520     if (sh_flags & SHF_PRIVATE) {
 521         dynarray_add((void ***)&s1->priv_sections, &s1->nb_priv_sections, sec);
 522     } else {
 523         sec->sh_num = s1->nb_sections;
 524         dynarray_add((void ***)&s1->sections, &s1->nb_sections, sec);
 525     }
 526
 527     return sec;
 528 }
 529
 530 static void free_section(Section *s)
 531 {
 532     tcc_free(s->data);
 533 }
 534
 535 /* realloc section and set its content to zero */
 536 ST_FUNC void section_realloc(Section *sec, unsigned long new_size)
 537 {
 538     unsigned long size;
 539     unsigned char *data;
 540
 541     size = sec->data_allocated;
 542     if (size == 0)
 543         size = 1;
 544     while (size < new_size)
 545         size = size * 2;
 546     data = tcc_realloc(sec->data, size);
 547     memset(data + sec->data_allocated, 0, size - sec->data_allocated);
 548     sec->data = data;
 549     sec->data_allocated = size;
 550 }
 551
 552 /* reserve at least 'size' bytes in section 'sec' from
 553    sec->data_offset. */
 554 ST_FUNC void *section_ptr_add(Section *sec, addr_t size)
 555 {
 556     size_t offset, offset1;
 557
 558     offset = sec->data_offset;
 559     offset1 = offset + size;
 560     if (offset1 > sec->data_allocated)
 561         section_realloc(sec, offset1);
 562     sec->data_offset = offset1;
 563     return sec->data + offset;
 564 }
 565
 566 /* reserve at least 'size' bytes from section start */
 567 ST_FUNC void section_reserve(Section *sec, unsigned long size)
 568 {
 569     if (size > sec->data_allocated)
 570         section_realloc(sec, size);
 571     if (size > sec->data_offset)
 572         sec->data_offset = size;
 573 }
 574
 575 /* return a reference to a section, and create it if it does not
 576    exists */
 577 ST_FUNC Section *find_section(TCCState *s1, const char *name)
 578 {
 579     Section *sec;
 580     int i;
 581     for(i = 1; i < s1->nb_sections; i++) {
 582         sec = s1->sections[i];
 583         if (!strcmp(name, sec->name))
 584             return sec;
 585     }
 586     /* sections are created as PROGBITS */
 587     return new_section(s1, name, SHT_PROGBITS, SHF_ALLOC);
 588 }
 589
 590 /* update sym->c so that it points to an external symbol in section
 591    'section' with value 'value' */
 592 ST_FUNC void put_extern_sym2(Sym *sym, Section *section,
 593                             addr_t value, unsigned long size,
 594                             int can_add_underscore)
 595 {
 596     int sym_type, sym_bind, sh_num, info, other;
 597     ElfW(Sym) *esym;
 598     const char *name;
 599     char buf1[256];
 600
 601 #ifdef CONFIG_TCC_BCHECK
 602     char buf[32];
 603 #endif
 604
 605     if (section == NULL)
 606         sh_num = SHN_UNDEF;
 607     else if (section == SECTION_ABS)
 608         sh_num = SHN_ABS;
 609     else
 610         sh_num = section->sh_num;
 611
 612     if ((sym->type.t & VT_BTYPE) == VT_FUNC) {
 613         sym_type = STT_FUNC;
 614     } else if ((sym->type.t & VT_BTYPE) == VT_VOID) {
 615         sym_type = STT_NOTYPE;
 616     } else {
 617         sym_type = STT_OBJECT;
 618     }
 619
 620     if (sym->type.t & VT_STATIC)
 621         sym_bind = STB_LOCAL;
 622     else {
 623         if (sym->type.t & VT_WEAK)
 624             sym_bind = STB_WEAK;
 625         else
 626             sym_bind = STB_GLOBAL;
 627     }
 628
 629     if (!sym->c) {
 630         name = get_tok_str(sym->v, NULL);
 631 #ifdef CONFIG_TCC_BCHECK
 632         if (tcc_state->do_bounds_check) {
 633             /* XXX: avoid doing that for statics ? */
 634             /* if bound checking is activated, we change some function
 635                names by adding the "__bound" prefix */
 636             switch(sym->v) {
 637 #ifdef TCC_TARGET_PE
 638             /* XXX: we rely only on malloc hooks */
 639             case TOK_malloc:
 640             case TOK_free:
 641             case TOK_realloc:
 642             case TOK_memalign:
 643             case TOK_calloc:
 644 #endif
 645             case TOK_memcpy:
 646             case TOK_memmove:
 647             case TOK_memset:
 648             case TOK_strlen:
 649             case TOK_strcpy:
 650             case TOK_alloca:
 651                 strcpy(buf, "__bound_");
 652                 strcat(buf, name);
 653                 name = buf;
 654                 break;
 655             }
 656         }
 657 #endif
 658         other = 0;
 659
 660 #ifdef TCC_TARGET_PE
 661         if (sym->type.t & VT_EXPORT)
 662             other |= ST_PE_EXPORT;
 663         if (sym_type == STT_FUNC && sym->type.ref) {
 664             Sym *ref = sym->type.ref;
 665             if (ref->a.func_export)
 666                 other |= ST_PE_EXPORT;
 667             if (ref->a.func_call == FUNC_STDCALL && can_add_underscore) {
 668                 sprintf(buf1, "_%s@%d", name, ref->a.func_args * PTR_SIZE);
 669                 name = buf1;
 670                 other |= ST_PE_STDCALL;
 671                 can_add_underscore = 0;
 672             }
 673         } else {
 674             if (find_elf_sym(tcc_state->dynsymtab_section, name))
 675                 other |= ST_PE_IMPORT;
 676             if (sym->type.t & VT_IMPORT)
 677                 other |= ST_PE_IMPORT;
 678         }
 679 #else
 680         if (! (sym->type.t & VT_STATIC))
 681             other = (sym->type.t & VT_VIS_MASK) >> VT_VIS_SHIFT;
 682 #endif
 683         if (tcc_state->leading_underscore && can_add_underscore) {
 684             buf1[0] = '_';
 685             pstrcpy(buf1 + 1, sizeof(buf1) - 1, name);
 686             name = buf1;
 687         }
 688         if (sym->asm_label) {
 689             name = get_tok_str(sym->asm_label, NULL);
 690         }
 691         info = ELFW(ST_INFO)(sym_bind, sym_type);
 692         sym->c = add_elf_sym(symtab_section, value, size, info, other, sh_num, name);
 693     } else {
 694         esym = &((ElfW(Sym) *)symtab_section->data)[sym->c];
 695         esym->st_value = value;
 696         esym->st_size = size;
 697         esym->st_shndx = sh_num;
 698     }
 699 }
 700
 701 ST_FUNC void put_extern_sym(Sym *sym, Section *section,
 702                            addr_t value, unsigned long size)
 703 {
 704     put_extern_sym2(sym, section, value, size, 1);
 705 }
 706
 707 /* add a new relocation entry to symbol 'sym' in section 's' */
 708 ST_FUNC void greloca(Section *s, Sym *sym, unsigned long offset, int type,
 709                      addr_t addend)
 710 {
 711     int c = 0;
 712     if (sym) {
 713         if (0 == sym->c)
 714             put_extern_sym(sym, NULL, 0, 0);
 715         c = sym->c;
 716     }
 717     /* now we can add ELF relocation info */
 718     put_elf_reloca(symtab_section, s, offset, type, c, addend);
 719 }
 720
 721 ST_FUNC void greloc(Section *s, Sym *sym, unsigned long offset, int type)
 722 {
 723     greloca(s, sym, offset, type, 0);
 724 }
 725
 726 /********************************************************/
 727
 728 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 729 {
 730     int len;
 731     len = strlen(buf);
 732     vsnprintf(buf + len, buf_size - len, fmt, ap);
 733 }
 734
 735 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 736 {
 737     va_list ap;
 738     va_start(ap, fmt);
 739     strcat_vprintf(buf, buf_size, fmt, ap);
 740     va_end(ap);
 741 }
 742
 743 static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 744 {
 745     char buf[2048];
 746     BufferedFile **pf, *f;
 747
 748     buf[0] = '\0';
 749     /* use upper file if inline ":asm:" or token ":paste:" */
 750     for (f = file; f && f->filename[0] == ':'; f = f->prev)
 751      ;
 752     if (f) {
 753         for(pf = s1->include_stack; pf < s1->include_stack_ptr; pf++)
 754             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 755                 (*pf)->filename, (*pf)->line_num);
 756         if (f->line_num > 0) {
 757             strcat_printf(buf, sizeof(buf), "%s:%d: ",
 758                 f->filename, f->line_num - !!(tok_flags & TOK_FLAG_BOL));
 759         } else {
 760             strcat_printf(buf, sizeof(buf), "%s: ",
 761                 f->filename);
 762         }
 763     } else {
 764         strcat_printf(buf, sizeof(buf), "tcc: ");
 765     }
 766     if (is_warning)
 767         strcat_printf(buf, sizeof(buf), "warning: ");
 768     else
 769         strcat_printf(buf, sizeof(buf), "error: ");
 770     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 771
 772     if (!s1->error_func) {
 773         /* default case: stderr */
 774         if (s1->ppfp) /* print a newline during tcc -E */
 775             fprintf(s1->ppfp, "\n"), fflush(s1->ppfp);
 776         fprintf(stderr, "%s\n", buf);
 777         fflush(stderr); /* print error/warning now (win32) */
 778     } else {
 779         s1->error_func(s1->error_opaque, buf);
 780     }
 781     if (!is_warning || s1->warn_error)
 782         s1->nb_errors++;
 783 }
 784
 785 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque,
 786                         void (*error_func)(void *opaque, const char *msg))
 787 {
 788     s->error_opaque = error_opaque;
 789     s->error_func = error_func;
 790 }
 791
 792 /* error without aborting current compilation */
 793 PUB_FUNC void tcc_error_noabort(const char *fmt, ...)
 794 {
 795     TCCState *s1 = tcc_state;
 796     va_list ap;
 797
 798     va_start(ap, fmt);
 799     error1(s1, 0, fmt, ap);
 800     va_end(ap);
 801 }
 802
 803 PUB_FUNC void tcc_error(const char *fmt, ...)
 804 {
 805     TCCState *s1 = tcc_state;
 806     va_list ap;
 807
 808     va_start(ap, fmt);
 809     error1(s1, 0, fmt, ap);
 810     va_end(ap);
 811     /* better than nothing: in some cases, we accept to handle errors */
 812     if (s1->error_set_jmp_enabled) {
 813         longjmp(s1->error_jmp_buf, 1);
 814     } else {
 815         /* XXX: eliminate this someday */
 816         exit(1);
 817     }
 818 }
 819
 820 PUB_FUNC void tcc_warning(const char *fmt, ...)
 821 {
 822     TCCState *s1 = tcc_state;
 823     va_list ap;
 824
 825     if (s1->warn_none)
 826         return;
 827
 828     va_start(ap, fmt);
 829     error1(s1, 1, fmt, ap);
 830     va_end(ap);
 831 }
 832
 833 /********************************************************/
 834 /* I/O layer */
 835
 836 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 837 {
 838     BufferedFile *bf;
 839     int buflen = initlen ? initlen : IO_BUF_SIZE;
 840
 841     bf = tcc_mallocz(sizeof(BufferedFile) + buflen);
 842     bf->buf_ptr = bf->buffer;
 843     bf->buf_end = bf->buffer + initlen;
 844     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 845     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 846 #ifdef _WIN32
 847     normalize_slashes(bf->filename);
 848 #endif
 849     bf->line_num = 1;
 850     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 851     bf->fd = -1;
 852     bf->prev = file;
 853     file = bf;
 854 }
 855
 856 ST_FUNC void tcc_close(void)
 857 {
 858     BufferedFile *bf = file;
 859     if (bf->fd > 0) {
 860         close(bf->fd);
 861         total_lines += bf->line_num;
 862     }
 863     file = bf->prev;
 864     tcc_free(bf);
 865 }
 866
 867 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
 868 {
 869     int fd;
 870     if (strcmp(filename, "-") == 0)
 871         fd = 0, filename = "<stdin>";
 872     else
 873         fd = open(filename, O_RDONLY | O_BINARY);
 874     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 875         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 876                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 877     if (fd < 0)
 878         return -1;
 879
 880     tcc_open_bf(s1, filename, 0);
 881     file->fd = fd;
 882     return fd;
 883 }
 884
 885 /* compile the C file opened in 'file'. Return non zero if errors. */
 886 static int tcc_compile(TCCState *s1)
 887 {
 888     Sym *define_start;
 889     char buf[512];
 890     volatile int section_sym;
 891
 892 #ifdef INC_DEBUG
 893     printf("%s: **** new file\n", file->filename);
 894 #endif
 895     preprocess_init(s1);
 896
 897     cur_text_section = NULL;
 898     funcname = "";
 899     anon_sym = SYM_FIRST_ANOM;
 900
 901     /* file info: full path + filename */
 902     section_sym = 0; /* avoid warning */
 903     if (s1->do_debug) {
 904         section_sym = put_elf_sym(symtab_section, 0, 0,
 905                                   ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
 906                                   text_section->sh_num, NULL);
 907         getcwd(buf, sizeof(buf));
 908 #ifdef _WIN32
 909         normalize_slashes(buf);
 910 #endif
 911         pstrcat(buf, sizeof(buf), "/");
 912         put_stabs_r(buf, N_SO, 0, 0,
 913                     text_section->data_offset, text_section, section_sym);
 914         put_stabs_r(file->filename, N_SO, 0, 0,
 915                     text_section->data_offset, text_section, section_sym);
 916     }
 917     /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
 918        symbols can be safely used */
 919     put_elf_sym(symtab_section, 0, 0,
 920                 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
 921                 SHN_ABS, file->filename);
 922
 923     /* define some often used types */
 924     int_type.t = VT_INT;
 925
 926     char_pointer_type.t = VT_BYTE;
 927     mk_pointer(&char_pointer_type);
 928
 929 #if PTR_SIZE == 4
 930     size_type.t = VT_INT;
 931 #else
 932     size_type.t = VT_LLONG;
 933 #endif
 934
 935     func_old_type.t = VT_FUNC;
 936     func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
 937 #ifdef TCC_TARGET_ARM
 938     arm_init(s1);
 939 #endif
 940
 941 #if 0
 942     /* define 'void *alloca(unsigned int)' builtin function */
 943     {
 944         Sym *s1;
 945
 946         p = anon_sym++;
 947         sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
 948         s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
 949         s1->next = NULL;
 950         sym->next = s1;
 951         sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
 952     }
 953 #endif
 954
 955     define_start = define_stack;
 956     nocode_wanted = 1;
 957
 958     if (setjmp(s1->error_jmp_buf) == 0) {
 959         s1->nb_errors = 0;
 960         s1->error_set_jmp_enabled = 1;
 961
 962         ch = file->buf_ptr[0];
 963         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 964         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM | PARSE_FLAG_TOK_STR;
 965         next();
 966         decl(VT_CONST);
 967         if (tok != TOK_EOF)
 968             expect("declaration");
 969         gen_inline_functions();
 970         check_vstack();
 971         /* end of translation unit info */
 972         if (s1->do_debug) {
 973             put_stabs_r(NULL, N_SO, 0, 0,
 974                         text_section->data_offset, text_section, section_sym);
 975         }
 976     }
 977
 978     s1->error_set_jmp_enabled = 0;
 979     /* reset define stack, but keep -D and built-ins */
 980     free_defines(define_start);
 981     sym_pop(&global_stack, NULL);
 982     sym_pop(&local_stack, NULL);
 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     /* 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
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     /* Those are defined by Visual Studio */
1122     tcc_define_symbol(s, "_M_X64", "100");
1123     tcc_define_symbol(s, "_M_AMD64", "100");
1124 # else
1125     /* Defined by Visual Studio. 300 == 80386. */
1126     tcc_define_symbol(s, "_M_IX86", "300");
1127 # endif
1128 #else
1129     tcc_define_symbol(s, "__unix__", NULL);
1130     tcc_define_symbol(s, "__unix", NULL);
1131     tcc_define_symbol(s, "unix", NULL);
1132 # if defined(__linux__)
1133     tcc_define_symbol(s, "__linux__", NULL);
1134     tcc_define_symbol(s, "__linux", NULL);
1135 # endif
1136 # if defined(__FreeBSD__)
1137     tcc_define_symbol(s, "__FreeBSD__", "__FreeBSD__");
1138 # endif
1139 # if defined(__FreeBSD_kernel__)
1140     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
1141 # endif
1142 #endif
1143 # if defined(__NetBSD__)
1144     tcc_define_symbol(s, "__NetBSD__", "__NetBSD__");
1145 # endif
1146
1147     /* TinyCC & gcc defines */
1148 #if defined(TCC_TARGET_PE) && defined(TCC_TARGET_X86_64)
1149     /* 64bit Windows. */
1150     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
1151     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
1152     tcc_define_symbol(s, "__LLP64__", NULL);
1153 #elif defined(TCC_TARGET_X86_64) || defined(TCC_TARGET_ARM64)
1154     /* Other 64bit systems. */
1155     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
1156     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
1157     tcc_define_symbol(s, "__LP64__", NULL);
1158 #else
1159     /* Other 32bit systems. */
1160     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
1161     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
1162     tcc_define_symbol(s, "__ILP32__", NULL);
1163 #endif
1164
1165 #ifdef TCC_TARGET_PE
1166     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
1167     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned short");
1168 #else
1169     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
1170     /* wint_t is unsigned int by default, but (signed) int on BSDs
1171        and unsigned short on windows.  Other OSes might have still
1172        other conventions, sigh.  */
1173 #if defined(__FreeBSD__) || defined (__FreeBSD_kernel__) || defined(__NetBSD__)
1174     tcc_define_symbol(s, "__WINT_TYPE__", "int");
1175 #else
1176     tcc_define_symbol(s, "__WINT_TYPE__", "unsigned int");
1177 #endif
1178 #endif
1179
1180 #ifndef TCC_TARGET_PE
1181     /* glibc defines */
1182     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)", "name proto __asm__ (#alias)");
1183     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)", "name proto __asm__ (#alias) __THROW");
1184     /* paths for crt objects */
1185     tcc_split_path(s, (void ***)&s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
1186 #endif
1187
1188     /* no section zero */
1189     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
1190
1191     /* create standard sections */
1192     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
1193     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
1194     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
1195
1196     /* symbols are always generated for linking stage */
1197     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
1198                                 ".strtab",
1199                                 ".hashtab", SHF_PRIVATE);
1200     strtab_section = symtab_section->link;
1201     s->symtab = symtab_section;
1202
1203     /* private symbol table for dynamic symbols */
1204     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
1205                                       ".dynstrtab",
1206                                       ".dynhashtab", SHF_PRIVATE);
1207     s->alacarte_link = 1;
1208     s->nocommon = 1;
1209     s->warn_implicit_function_declaration = 1;
1210
1211 #ifdef CHAR_IS_UNSIGNED
1212     s->char_is_unsigned = 1;
1213 #endif
1214     /* enable this if you want symbols with leading underscore on windows: */
1215 #if 0 /* def TCC_TARGET_PE */
1216     s->leading_underscore = 1;
1217 #endif
1218 #ifdef TCC_TARGET_I386
1219     s->seg_size = 32;
1220 #endif
1221 #ifdef TCC_IS_NATIVE
1222     s->runtime_main = "main";
1223 #endif
1224     return s;
1225 }
1226
1227 LIBTCCAPI void tcc_delete(TCCState *s1)
1228 {
1229     int i;
1230     int bench = s1->do_bench;
1231
1232     tcc_cleanup();
1233
1234     /* free all sections */
1235     for(i = 1; i < s1->nb_sections; i++)
1236         free_section(s1->sections[i]);
1237     dynarray_reset(&s1->sections, &s1->nb_sections);
1238
1239     for(i = 0; i < s1->nb_priv_sections; i++)
1240         free_section(s1->priv_sections[i]);
1241     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1242
1243     /* free any loaded DLLs */
1244 #ifdef TCC_IS_NATIVE
1245     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1246         DLLReference *ref = s1->loaded_dlls[i];
1247         if ( ref->handle )
1248             dlclose(ref->handle);
1249     }
1250 #endif
1251
1252     /* free loaded dlls array */
1253     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1254
1255     /* free library paths */
1256     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1257     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
1258
1259     /* free include paths */
1260     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1261     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1262     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1263
1264     tcc_free(s1->tcc_lib_path);
1265     tcc_free(s1->soname);
1266     tcc_free(s1->rpath);
1267     tcc_free(s1->init_symbol);
1268     tcc_free(s1->fini_symbol);
1269     tcc_free(s1->outfile);
1270     tcc_free(s1->deps_outfile);
1271     dynarray_reset(&s1->files, &s1->nb_files);
1272     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
1273     dynarray_reset(&s1->pragma_libs, &s1->nb_pragma_libs);
1274
1275 #ifdef TCC_IS_NATIVE
1276 # ifdef HAVE_SELINUX
1277     munmap (s1->write_mem, s1->mem_size);
1278     munmap (s1->runtime_mem, s1->mem_size);
1279 # else
1280     tcc_free(s1->runtime_mem);
1281 # endif
1282 #endif
1283
1284     tcc_free(s1->sym_attrs);
1285     tcc_free(s1);
1286     tcc_memstats(bench);
1287 }
1288
1289 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
1290 {
1291     tcc_split_path(s, (void ***)&s->include_paths, &s->nb_include_paths, pathname);
1292     return 0;
1293 }
1294
1295 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
1296 {
1297     tcc_split_path(s, (void ***)&s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
1298     return 0;
1299 }
1300
1301 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1302 {
1303     int ret, filetype;
1304
1305     filetype = flags & 0x0F;
1306     if (filetype == 0) {
1307         /* use a file extension to detect a filetype */
1308         const char *ext = tcc_fileextension(filename);
1309         if (ext[0]) {
1310             ext++;
1311             if (!strcmp(ext, "S"))
1312                 filetype = AFF_TYPE_ASMPP;
1313             else if (!strcmp(ext, "s"))
1314                 filetype = AFF_TYPE_ASM;
1315             else if (!PATHCMP(ext, "c") || !PATHCMP(ext, "i"))
1316                 filetype = AFF_TYPE_C;
1317             else
1318                 filetype = AFF_TYPE_BIN;
1319         } else {
1320             filetype = AFF_TYPE_C;
1321         }
1322     }
1323
1324     /* open the file */
1325     ret = tcc_open(s1, filename);
1326     if (ret < 0) {
1327         if (flags & AFF_PRINT_ERROR)
1328             tcc_error_noabort("file '%s' not found", filename);
1329         return ret;
1330     }
1331
1332     /* update target deps */
1333     dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1334             tcc_strdup(filename));
1335
1336     parse_flags = 0;
1337     /* if .S file, define __ASSEMBLER__ like gcc does */
1338     if (filetype == AFF_TYPE_ASM || filetype == AFF_TYPE_ASMPP) {
1339         tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
1340         parse_flags = PARSE_FLAG_ASM_FILE;
1341     }
1342
1343     if (flags & AFF_PREPROCESS) {
1344         ret = tcc_preprocess(s1);
1345     } else if (filetype == AFF_TYPE_C) {
1346         ret = tcc_compile(s1);
1347 #ifdef CONFIG_TCC_ASM
1348     } else if (filetype == AFF_TYPE_ASMPP) {
1349         /* non preprocessed assembler */
1350         ret = tcc_assemble(s1, 1);
1351     } else if (filetype == AFF_TYPE_ASM) {
1352         /* preprocessed assembler */
1353         ret = tcc_assemble(s1, 0);
1354 #endif
1355     } else {
1356         ElfW(Ehdr) ehdr;
1357         int fd, obj_type;
1358
1359         fd = file->fd;
1360         obj_type = tcc_object_type(fd, &ehdr);
1361         lseek(fd, 0, SEEK_SET);
1362
1363         /* do not display line number if error */
1364         file->line_num = 0;
1365
1366         switch (obj_type) {
1367         case AFF_BINTYPE_REL:
1368             ret = tcc_load_object_file(s1, fd, 0);
1369             break;
1370 #ifndef TCC_TARGET_PE
1371         case AFF_BINTYPE_DYN:
1372             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1373                 ret = 0;
1374 #ifdef TCC_IS_NATIVE
1375                 if (NULL == dlopen(filename, RTLD_GLOBAL | RTLD_LAZY))
1376                     ret = -1;
1377 #endif
1378             } else {
1379                 ret = tcc_load_dll(s1, fd, filename,
1380                                    (flags & AFF_REFERENCED_DLL) != 0);
1381             }
1382             break;
1383 #endif
1384         case AFF_BINTYPE_AR:
1385             ret = tcc_load_archive(s1, fd);
1386             break;
1387 #ifdef TCC_TARGET_COFF
1388         case AFF_BINTYPE_C67:
1389             ret = tcc_load_coff(s1, fd);
1390             break;
1391 #endif
1392         default:
1393 #ifdef TCC_TARGET_PE
1394             ret = pe_load_file(s1, filename, fd);
1395 #else
1396             /* as GNU ld, consider it is an ld script if not recognized */
1397             ret = tcc_load_ldscript(s1);
1398 #endif
1399             if (ret < 0)
1400                 tcc_error_noabort("unrecognized file type");
1401             break;
1402         }
1403     }
1404     tcc_close();
1405     return ret;
1406 }
1407
1408 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1409 {
1410     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1411         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS | s->filetype);
1412     else
1413         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | s->filetype);
1414 }
1415
1416 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1417 {
1418     tcc_split_path(s, (void ***)&s->library_paths, &s->nb_library_paths, pathname);
1419     return 0;
1420 }
1421
1422 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1423     const char *filename, int flags, char **paths, int nb_paths)
1424 {
1425     char buf[1024];
1426     int i;
1427
1428     for(i = 0; i < nb_paths; i++) {
1429         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1430         if (tcc_add_file_internal(s, buf, flags | AFF_TYPE_BIN) == 0)
1431             return 0;
1432     }
1433     return -1;
1434 }
1435
1436 #ifndef TCC_TARGET_PE
1437 /* find and load a dll. Return non zero if not found */
1438 /* XXX: add '-rpath' option support ? */
1439 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1440 {
1441     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1442         s->library_paths, s->nb_library_paths);
1443 }
1444 #endif
1445
1446 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename)
1447 {
1448     if (-1 == tcc_add_library_internal(s, "%s/%s",
1449         filename, 0, s->crt_paths, s->nb_crt_paths))
1450         tcc_error_noabort("file '%s' not found", filename);
1451     return 0;
1452 }
1453
1454 /* the library name is the same as the argument of the '-l' option */
1455 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1456 {
1457 #ifdef TCC_TARGET_PE
1458     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1459     const char **pp = s->static_link ? libs + 4 : libs;
1460 #else
1461     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1462     const char **pp = s->static_link ? libs + 1 : libs;
1463 #endif
1464     while (*pp) {
1465         if (0 == tcc_add_library_internal(s, *pp,
1466             libraryname, 0, s->library_paths, s->nb_library_paths))
1467             return 0;
1468         ++pp;
1469     }
1470     return -1;
1471 }
1472
1473 PUB_FUNC int tcc_add_library_err(TCCState *s, const char *libname)
1474 {
1475     int ret = tcc_add_library(s, libname);
1476     if (ret < 0)
1477         tcc_error_noabort("cannot find library 'lib%s'", libname);
1478     return ret;
1479 }
1480
1481 /* habdle #pragma comment(lib,) */
1482 ST_FUNC void tcc_add_pragma_libs(TCCState *s1)
1483 {
1484     int i;
1485     for (i = 0; i < s1->nb_pragma_libs; i++)
1486         tcc_add_library_err(s1, s1->pragma_libs[i]);
1487 }
1488
1489 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1490 {
1491 #ifdef TCC_TARGET_PE
1492     /* On x86_64 'val' might not be reachable with a 32bit offset.
1493        So it is handled here as if it were in a DLL. */
1494     pe_putimport(s, 0, name, (uintptr_t)val);
1495 #else
1496     add_elf_sym(symtab_section, (uintptr_t)val, 0,
1497         ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1498         SHN_ABS, name);
1499 #endif
1500     return 0;
1501 }
1502
1503 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
1504 {
1505     s->output_type = output_type;
1506
1507     /* always elf for objects */
1508     if (output_type == TCC_OUTPUT_OBJ)
1509         s->output_format = TCC_OUTPUT_FORMAT_ELF;
1510
1511     if (s->char_is_unsigned)
1512         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
1513
1514     if (!s->nostdinc) {
1515         /* default include paths */
1516         /* -isystem paths have already been handled */
1517         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
1518     }
1519
1520 #ifdef CONFIG_TCC_BCHECK
1521     /* if bound checking, then add corresponding sections */
1522     if (s->do_bounds_check) {
1523         /* define symbol */
1524         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1525         /* create bounds sections */
1526         bounds_section = new_section(s, ".bounds",
1527                                      SHT_PROGBITS, SHF_ALLOC);
1528         lbounds_section = new_section(s, ".lbounds",
1529                                       SHT_PROGBITS, SHF_ALLOC);
1530     }
1531 #endif
1532     /* add debug sections */
1533     if (s->do_debug) {
1534         /* stab symbols */
1535         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
1536         stab_section->sh_entsize = sizeof(Stab_Sym);
1537         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
1538         put_elf_str(stabstr_section, "");
1539         stab_section->link = stabstr_section;
1540         /* put first entry */
1541         put_stabs("", 0, 0, 0, 0);
1542     }
1543
1544     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
1545
1546 #ifdef TCC_TARGET_PE
1547 # ifdef _WIN32
1548     if (!s->nostdlib && output_type != TCC_OUTPUT_OBJ)
1549         tcc_add_systemdir(s);
1550 # endif
1551 #else
1552     /* add libc crt1/crti objects */
1553     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1554         !s->nostdlib) {
1555         if (output_type != TCC_OUTPUT_DLL)
1556             tcc_add_crt(s, "crt1.o");
1557         tcc_add_crt(s, "crti.o");
1558     }
1559 #endif
1560     return 0;
1561 }
1562
1563 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1564 {
1565     tcc_free(s->tcc_lib_path);
1566     s->tcc_lib_path = tcc_strdup(path);
1567 }
1568
1569 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1570 #define FD_INVERT 0x0002 /* invert value before storing */
1571
1572 typedef struct FlagDef {
1573     uint16_t offset;
1574     uint16_t flags;
1575     const char *name;
1576 } FlagDef;
1577
1578 static const FlagDef warning_defs[] = {
1579     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1580     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1581     { offsetof(TCCState, warn_error), 0, "error" },
1582     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1583       "implicit-function-declaration" },
1584 };
1585
1586 static int no_flag(const char **pp)
1587 {
1588     const char *p = *pp;
1589     if (*p != 'n' || *++p != 'o' || *++p != '-')
1590         return 0;
1591     *pp = p + 1;
1592     return 1;
1593 }
1594
1595 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1596                     const char *name, int value)
1597 {
1598     int i;
1599     const FlagDef *p;
1600     const char *r;
1601
1602     r = name;
1603     if (no_flag(&r))
1604         value = !value;
1605
1606     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1607         if (!strcmp(r, p->name))
1608             goto found;
1609     }
1610     return -1;
1611  found:
1612     if (p->flags & FD_INVERT)
1613         value = !value;
1614     *(int *)((uint8_t *)s + p->offset) = value;
1615     return 0;
1616 }
1617
1618 /* set/reset a warning */
1619 static int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1620 {
1621     int i;
1622     const FlagDef *p;
1623
1624     if (!strcmp(warning_name, "all")) {
1625         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1626             if (p->flags & WD_ALL)
1627                 *(int *)((uint8_t *)s + p->offset) = 1;
1628         }
1629         return 0;
1630     } else {
1631         return set_flag(s, warning_defs, countof(warning_defs),
1632                         warning_name, value);
1633     }
1634 }
1635
1636 static const FlagDef flag_defs[] = {
1637     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1638     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1639     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1640     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1641     { offsetof(TCCState, ms_extensions), 0, "ms-extensions" },
1642     { offsetof(TCCState, old_struct_init_code), 0, "old-struct-init-code" },
1643     { offsetof(TCCState, dollars_in_identifiers), 0, "dollars-in-identifiers" },
1644 };
1645
1646 /* set/reset a flag */
1647 static int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1648 {
1649     return set_flag(s, flag_defs, countof(flag_defs),
1650                     flag_name, value);
1651 }
1652
1653
1654 static int strstart(const char *val, const char **str)
1655 {
1656     const char *p, *q;
1657     p = *str;
1658     q = val;
1659     while (*q) {
1660         if (*p != *q)
1661             return 0;
1662         p++;
1663         q++;
1664     }
1665     *str = p;
1666     return 1;
1667 }
1668
1669 /* Like strstart, but automatically takes into account that ld options can
1670  *
1671  * - start with double or single dash (e.g. '--soname' or '-soname')
1672  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1673  *   or '-Wl,-soname=x.so')
1674  *
1675  * you provide `val` always in 'option[=]' form (no leading -)
1676  */
1677 static int link_option(const char *str, const char *val, const char **ptr)
1678 {
1679     const char *p, *q;
1680     int ret;
1681
1682     /* there should be 1 or 2 dashes */
1683     if (*str++ != '-')
1684         return 0;
1685     if (*str == '-')
1686         str++;
1687
1688     /* then str & val should match (potentialy up to '=') */
1689     p = str;
1690     q = val;
1691
1692     ret = 1;
1693     if (q[0] == '?') {
1694         ++q;
1695         if (no_flag(&p))
1696             ret = -1;
1697     }
1698
1699     while (*q != '\0' && *q != '=') {
1700         if (*p != *q)
1701             return 0;
1702         p++;
1703         q++;
1704     }
1705
1706     /* '=' near eos means ',' or '=' is ok */
1707     if (*q == '=') {
1708         if (*p == 0)
1709             *ptr = p;
1710         if (*p != ',' && *p != '=')
1711             return 0;
1712         p++;
1713     }
1714     *ptr = p;
1715     return ret;
1716 }
1717
1718 static const char *skip_linker_arg(const char **str)
1719 {
1720     const char *s1 = *str;
1721     const char *s2 = strchr(s1, ',');
1722     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1723     return s2;
1724 }
1725
1726 static char *copy_linker_arg(const char *p)
1727 {
1728     const char *q = p;
1729     skip_linker_arg(&q);
1730     return pstrncpy(tcc_malloc(q - p + 1), p, q - p);
1731 }
1732
1733 /* set linker options */
1734 static int tcc_set_linker(TCCState *s, const char *option)
1735 {
1736     while (*option) {
1737
1738         const char *p = NULL;
1739         char *end = NULL;
1740         int ignoring = 0;
1741         int ret;
1742
1743         if (link_option(option, "Bsymbolic", &p)) {
1744             s->symbolic = 1;
1745         } else if (link_option(option, "nostdlib", &p)) {
1746             s->nostdlib = 1;
1747         } else if (link_option(option, "fini=", &p)) {
1748             s->fini_symbol = copy_linker_arg(p);
1749             ignoring = 1;
1750         } else if (link_option(option, "image-base=", &p)
1751                 || link_option(option, "Ttext=", &p)) {
1752             s->text_addr = strtoull(p, &end, 16);
1753             s->has_text_addr = 1;
1754         } else if (link_option(option, "init=", &p)) {
1755             s->init_symbol = copy_linker_arg(p);
1756             ignoring = 1;
1757         } else if (link_option(option, "oformat=", &p)) {
1758 #if defined(TCC_TARGET_PE)
1759             if (strstart("pe-", &p)) {
1760 #elif defined(TCC_TARGET_ARM64) || defined(TCC_TARGET_X86_64)
1761             if (strstart("elf64-", &p)) {
1762 #else
1763             if (strstart("elf32-", &p)) {
1764 #endif
1765                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1766             } else if (!strcmp(p, "binary")) {
1767                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1768 #ifdef TCC_TARGET_COFF
1769             } else if (!strcmp(p, "coff")) {
1770                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1771 #endif
1772             } else
1773                 goto err;
1774
1775         } else if (link_option(option, "as-needed", &p)) {
1776             ignoring = 1;
1777         } else if (link_option(option, "O", &p)) {
1778             ignoring = 1;
1779         } else if (link_option(option, "rpath=", &p)) {
1780             s->rpath = copy_linker_arg(p);
1781         } else if (link_option(option, "section-alignment=", &p)) {
1782             s->section_align = strtoul(p, &end, 16);
1783         } else if (link_option(option, "soname=", &p)) {
1784             s->soname = copy_linker_arg(p);
1785 #ifdef TCC_TARGET_PE
1786         } else if (link_option(option, "file-alignment=", &p)) {
1787             s->pe_file_align = strtoul(p, &end, 16);
1788         } else if (link_option(option, "stack=", &p)) {
1789             s->pe_stack_size = strtoul(p, &end, 10);
1790         } else if (link_option(option, "subsystem=", &p)) {
1791 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1792             if (!strcmp(p, "native")) {
1793                 s->pe_subsystem = 1;
1794             } else if (!strcmp(p, "console")) {
1795                 s->pe_subsystem = 3;
1796             } else if (!strcmp(p, "gui")) {
1797                 s->pe_subsystem = 2;
1798             } else if (!strcmp(p, "posix")) {
1799                 s->pe_subsystem = 7;
1800             } else if (!strcmp(p, "efiapp")) {
1801                 s->pe_subsystem = 10;
1802             } else if (!strcmp(p, "efiboot")) {
1803                 s->pe_subsystem = 11;
1804             } else if (!strcmp(p, "efiruntime")) {
1805                 s->pe_subsystem = 12;
1806             } else if (!strcmp(p, "efirom")) {
1807                 s->pe_subsystem = 13;
1808 #elif defined(TCC_TARGET_ARM)
1809             if (!strcmp(p, "wince")) {
1810                 s->pe_subsystem = 9;
1811 #endif
1812             } else
1813                 goto err;
1814 #endif
1815         } else if (ret = link_option(option, "?whole-archive", &p), ret) {
1816             s->alacarte_link = ret < 0;
1817         } else if (p) {
1818             return 0;
1819         } else {
1820     err:
1821             tcc_error("unsupported linker option '%s'", option);
1822         }
1823
1824         if (ignoring && s->warn_unsupported)
1825             tcc_warning("unsupported linker option '%s'", option);
1826
1827         option = skip_linker_arg(&p);
1828     }
1829     return 1;
1830 }
1831
1832 typedef struct TCCOption {
1833     const char *name;
1834     uint16_t index;
1835     uint16_t flags;
1836 } TCCOption;
1837
1838 enum {
1839     TCC_OPTION_HELP,
1840     TCC_OPTION_I,
1841     TCC_OPTION_D,
1842     TCC_OPTION_U,
1843     TCC_OPTION_P,
1844     TCC_OPTION_L,
1845     TCC_OPTION_B,
1846     TCC_OPTION_l,
1847     TCC_OPTION_bench,
1848     TCC_OPTION_bt,
1849     TCC_OPTION_b,
1850     TCC_OPTION_g,
1851     TCC_OPTION_c,
1852     TCC_OPTION_dumpversion,
1853     TCC_OPTION_d,
1854     TCC_OPTION_float_abi,
1855     TCC_OPTION_static,
1856     TCC_OPTION_std,
1857     TCC_OPTION_shared,
1858     TCC_OPTION_soname,
1859     TCC_OPTION_o,
1860     TCC_OPTION_r,
1861     TCC_OPTION_s,
1862     TCC_OPTION_traditional,
1863     TCC_OPTION_Wl,
1864     TCC_OPTION_W,
1865     TCC_OPTION_O,
1866     TCC_OPTION_m,
1867     TCC_OPTION_f,
1868     TCC_OPTION_isystem,
1869     TCC_OPTION_iwithprefix,
1870     TCC_OPTION_nostdinc,
1871     TCC_OPTION_nostdlib,
1872     TCC_OPTION_print_search_dirs,
1873     TCC_OPTION_rdynamic,
1874     TCC_OPTION_pedantic,
1875     TCC_OPTION_pthread,
1876     TCC_OPTION_run,
1877     TCC_OPTION_v,
1878     TCC_OPTION_w,
1879     TCC_OPTION_pipe,
1880     TCC_OPTION_E,
1881     TCC_OPTION_MD,
1882     TCC_OPTION_MF,
1883     TCC_OPTION_x
1884 };
1885
1886 #define TCC_OPTION_HAS_ARG 0x0001
1887 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1888
1889 static const TCCOption tcc_options[] = {
1890     { "h", TCC_OPTION_HELP, 0 },
1891     { "-help", TCC_OPTION_HELP, 0 },
1892     { "?", TCC_OPTION_HELP, 0 },
1893     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1894     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1895     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1896     { "P", TCC_OPTION_P, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1897     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1898     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1899     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1900     { "bench", TCC_OPTION_bench, 0 },
1901 #ifdef CONFIG_TCC_BACKTRACE
1902     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
1903 #endif
1904 #ifdef CONFIG_TCC_BCHECK
1905     { "b", TCC_OPTION_b, 0 },
1906 #endif
1907     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1908     { "c", TCC_OPTION_c, 0 },
1909     { "dumpversion", TCC_OPTION_dumpversion, 0},
1910     { "d", TCC_OPTION_d, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1911 #ifdef TCC_TARGET_ARM
1912     { "mfloat-abi", TCC_OPTION_float_abi, TCC_OPTION_HAS_ARG },
1913 #endif
1914     { "static", TCC_OPTION_static, 0 },
1915     { "std", TCC_OPTION_std, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1916     { "shared", TCC_OPTION_shared, 0 },
1917     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
1918     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
1919     { "pedantic", TCC_OPTION_pedantic, 0},
1920     { "pthread", TCC_OPTION_pthread, 0},
1921     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1922     { "rdynamic", TCC_OPTION_rdynamic, 0 },
1923     { "r", TCC_OPTION_r, 0 },
1924     { "s", TCC_OPTION_s, 0 },
1925     { "traditional", TCC_OPTION_traditional, 0 },
1926     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1927     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1928     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1929     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG },
1930     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1931     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
1932     { "iwithprefix", TCC_OPTION_iwithprefix, TCC_OPTION_HAS_ARG },
1933     { "nostdinc", TCC_OPTION_nostdinc, 0 },
1934     { "nostdlib", TCC_OPTION_nostdlib, 0 },
1935     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
1936     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1937     { "w", TCC_OPTION_w, 0 },
1938     { "pipe", TCC_OPTION_pipe, 0},
1939     { "E", TCC_OPTION_E, 0},
1940     { "MD", TCC_OPTION_MD, 0},
1941     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
1942     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
1943     { NULL, 0, 0 },
1944 };
1945
1946 static void parse_option_D(TCCState *s1, const char *optarg)
1947 {
1948     char *sym = tcc_strdup(optarg);
1949     char *value = strchr(sym, '=');
1950     if (value)
1951         *value++ = '\0';
1952     tcc_define_symbol(s1, sym, value);
1953     tcc_free(sym);
1954 }
1955
1956 static void args_parser_add_file(TCCState *s, const char* filename, int filetype)
1957 {
1958     struct filespec *f = tcc_malloc(sizeof *f + strlen(filename));
1959     f->type = filetype;
1960     strcpy(f->name, filename);
1961     dynarray_add((void ***)&s->files, &s->nb_files, f);
1962 }
1963
1964 /* read list file */
1965 static void args_parser_listfile(TCCState *s, const char *filename)
1966 {
1967     int fd;
1968     size_t len;
1969     char *p;
1970
1971     fd = open(filename, O_RDONLY | O_BINARY);
1972     if (fd < 0)
1973         tcc_error("file '%s' not found", filename);
1974
1975     len = lseek(fd, 0, SEEK_END);
1976     p = tcc_malloc(len + 1), p[len] = 0;
1977     lseek(fd, 0, SEEK_SET), read(fd, p, len), close(fd);
1978     tcc_set_options(s, p);
1979     tcc_free(p);
1980 }
1981
1982 PUB_FUNC int tcc_parse_args(TCCState *s, int argc, char **argv)
1983 {
1984     const TCCOption *popt;
1985     const char *optarg, *r;
1986     int optind = 0;
1987     int run = 0;
1988     int x;
1989     CString linker_arg; /* collect -Wl options */
1990     char buf[1024];
1991
1992     cstr_new(&linker_arg);
1993
1994     while (optind < argc) {
1995
1996         r = argv[optind++];
1997
1998         if (r[0] == '@' && r[1] != '\0') {
1999             args_parser_listfile(s, r + 1);
2000             continue;
2001         }
2002
2003         if (r[0] != '-' || r[1] == '\0') {
2004             args_parser_add_file(s, r, s->filetype);
2005             if (run) {
2006                 optind--;
2007                 /* argv[0] will be this file */
2008                 break;
2009             }
2010             continue;
2011         }
2012
2013         /* find option in table */
2014         for(popt = tcc_options; ; ++popt) {
2015             const char *p1 = popt->name;
2016             const char *r1 = r + 1;
2017             if (p1 == NULL)
2018                 tcc_error("invalid option -- '%s'", r);
2019             if (!strstart(p1, &r1))
2020                 continue;
2021             optarg = r1;
2022             if (popt->flags & TCC_OPTION_HAS_ARG) {
2023                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
2024                     if (optind >= argc)
2025                 arg_err:
2026                         tcc_error("argument to '%s' is missing", r);
2027                     optarg = argv[optind++];
2028                 }
2029             } else if (*r1 != '\0')
2030                 continue;
2031             break;
2032         }
2033
2034         switch(popt->index) {
2035         case TCC_OPTION_HELP:
2036             return 0;
2037         case TCC_OPTION_I:
2038             tcc_add_include_path(s, optarg);
2039             break;
2040         case TCC_OPTION_D:
2041             parse_option_D(s, optarg);
2042             break;
2043         case TCC_OPTION_U:
2044             tcc_undefine_symbol(s, optarg);
2045             break;
2046         case TCC_OPTION_L:
2047             tcc_add_library_path(s, optarg);
2048             break;
2049         case TCC_OPTION_B:
2050             /* set tcc utilities path (mainly for tcc development) */
2051             tcc_set_lib_path(s, optarg);
2052             break;
2053         case TCC_OPTION_l:
2054             args_parser_add_file(s, optarg, AFF_TYPE_LIBWH - s->alacarte_link);
2055             s->nb_libraries++;
2056             break;
2057         case TCC_OPTION_pthread:
2058             parse_option_D(s, "_REENTRANT");
2059             s->option_pthread = 1;
2060             break;
2061         case TCC_OPTION_bench:
2062             s->do_bench = 1;
2063             break;
2064 #ifdef CONFIG_TCC_BACKTRACE
2065         case TCC_OPTION_bt:
2066             tcc_set_num_callers(atoi(optarg));
2067             break;
2068 #endif
2069 #ifdef CONFIG_TCC_BCHECK
2070         case TCC_OPTION_b:
2071             s->do_bounds_check = 1;
2072             s->do_debug = 1;
2073             break;
2074 #endif
2075         case TCC_OPTION_g:
2076             s->do_debug = 1;
2077             break;
2078         case TCC_OPTION_c:
2079             x = TCC_OUTPUT_OBJ;
2080         set_output_type:
2081             if (s->output_type)
2082                 tcc_warning("-%s: overriding compiler action already specified", popt->name);
2083             s->output_type = x;
2084             break;
2085         case TCC_OPTION_d:
2086             if (*optarg == 'D')
2087                 s->dflag = 3;
2088             else if (*optarg == 'M')
2089                 s->dflag = 7;
2090             else
2091                 goto unsupported_option;
2092             break;
2093 #ifdef TCC_TARGET_ARM
2094         case TCC_OPTION_float_abi:
2095             /* tcc doesn't support soft float yet */
2096             if (!strcmp(optarg, "softfp")) {
2097                 s->float_abi = ARM_SOFTFP_FLOAT;
2098                 tcc_undefine_symbol(s, "__ARM_PCS_VFP");
2099             } else if (!strcmp(optarg, "hard"))
2100                 s->float_abi = ARM_HARD_FLOAT;
2101             else
2102                 tcc_error("unsupported float abi '%s'", optarg);
2103             break;
2104 #endif
2105         case TCC_OPTION_static:
2106             s->static_link = 1;
2107             break;
2108         case TCC_OPTION_std:
2109             /* silently ignore, a current purpose:
2110                allow to use a tcc as a reference compiler for "make test" */
2111             break;
2112         case TCC_OPTION_shared:
2113             x = TCC_OUTPUT_DLL;
2114             goto set_output_type;
2115         case TCC_OPTION_soname:
2116             s->soname = tcc_strdup(optarg);
2117             break;
2118         case TCC_OPTION_m:
2119             s->option_m = tcc_strdup(optarg);
2120             break;
2121         case TCC_OPTION_o:
2122             if (s->outfile) {
2123                 tcc_warning("multiple -o option");
2124                 tcc_free(s->outfile);
2125             }
2126             s->outfile = tcc_strdup(optarg);
2127             break;
2128         case TCC_OPTION_r:
2129             /* generate a .o merging several output files */
2130             s->option_r = 1;
2131             x = TCC_OUTPUT_OBJ;
2132             goto set_output_type;
2133         case TCC_OPTION_isystem:
2134             tcc_add_sysinclude_path(s, optarg);
2135             break;
2136         case TCC_OPTION_iwithprefix:
2137             snprintf(buf, sizeof buf, "{B}/%s", optarg);
2138             tcc_add_sysinclude_path(s, buf);
2139             break;
2140         case TCC_OPTION_nostdinc:
2141             s->nostdinc = 1;
2142             break;
2143         case TCC_OPTION_nostdlib:
2144             s->nostdlib = 1;
2145             break;
2146         case TCC_OPTION_print_search_dirs:
2147             s->print_search_dirs = 1;
2148             break;
2149         case TCC_OPTION_run:
2150 #ifndef TCC_IS_NATIVE
2151             tcc_error("-run is not available in a cross compiler");
2152 #endif
2153             tcc_set_options(s, optarg);
2154             run = 1;
2155             x = TCC_OUTPUT_MEMORY;
2156             goto set_output_type;
2157         case TCC_OPTION_v:
2158             do ++s->verbose; while (*optarg++ == 'v');
2159             break;
2160         case TCC_OPTION_f:
2161             if (tcc_set_flag(s, optarg, 1) < 0)
2162                 goto unsupported_option;
2163             break;
2164         case TCC_OPTION_W:
2165             if (tcc_set_warning(s, optarg, 1) < 0)
2166                 goto unsupported_option;
2167             break;
2168         case TCC_OPTION_w:
2169             s->warn_none = 1;
2170             break;
2171         case TCC_OPTION_rdynamic:
2172             s->rdynamic = 1;
2173             break;
2174         case TCC_OPTION_Wl:
2175             if (linker_arg.size)
2176                 --linker_arg.size, cstr_ccat(&linker_arg, ',');
2177             cstr_cat(&linker_arg, optarg, 0);
2178             if (tcc_set_linker(s, linker_arg.data))
2179                 cstr_free(&linker_arg);
2180             break;
2181         case TCC_OPTION_E:
2182             x = TCC_OUTPUT_PREPROCESS;
2183             goto set_output_type;
2184         case TCC_OPTION_P:
2185             s->Pflag = atoi(optarg) + 1;
2186             break;
2187         case TCC_OPTION_MD:
2188             s->gen_deps = 1;
2189             break;
2190         case TCC_OPTION_MF:
2191             s->deps_outfile = tcc_strdup(optarg);
2192             break;
2193         case TCC_OPTION_dumpversion:
2194             printf ("%s\n", TCC_VERSION);
2195             exit(0);
2196             break;
2197         case TCC_OPTION_x:
2198             if (*optarg == 'c')
2199                 s->filetype = AFF_TYPE_C;
2200             else if (*optarg == 'a')
2201                 s->filetype = AFF_TYPE_ASMPP;
2202             else if (*optarg == 'n')
2203                 s->filetype = AFF_TYPE_NONE;
2204             else
2205                 tcc_warning("unsupported language '%s'", optarg);
2206             break;
2207         case TCC_OPTION_O:
2208             x = atoi(optarg);
2209             if (x > 0)
2210                 tcc_define_symbol(s, "__OPTIMIZE__", NULL);
2211             break;
2212         case TCC_OPTION_traditional:
2213         case TCC_OPTION_pedantic:
2214         case TCC_OPTION_pipe:
2215         case TCC_OPTION_s:
2216             /* ignored */
2217             break;
2218         default:
2219 unsupported_option:
2220             if (s->warn_unsupported)
2221                 tcc_warning("unsupported option '%s'", r);
2222             break;
2223         }
2224     }
2225
2226     if (linker_arg.size) {
2227         r = linker_arg.data;
2228         goto arg_err;
2229     }
2230
2231     return optind;
2232 }
2233
2234 LIBTCCAPI int tcc_set_options(TCCState *s, const char *r)
2235 {
2236     char **argv;
2237     int argc;
2238     int ret, q, c;
2239     CString str;
2240
2241     argc = 0, argv = NULL;
2242     for(;;) {
2243         while (c = (unsigned char)*r, c && c <= ' ')
2244             ++r;
2245         if (c == 0)
2246             break;
2247         q = 0;
2248         cstr_new(&str);
2249         while (c = (unsigned char)*r, c) {
2250             ++r;
2251             if (c == '\\' && (*r == '"' || *r == '\\')) {
2252                 c = *r++;
2253             } else if (c == '"') {
2254                 q = !q;
2255                 continue;
2256             } else if (q == 0 && c <= ' ') {
2257                 break;
2258             }
2259             cstr_ccat(&str, c);
2260         }
2261         cstr_ccat(&str, 0);
2262         //printf("<%s>\n", str.data), fflush(stdout);
2263         dynarray_add((void ***)&argv, &argc, tcc_strdup(str.data));
2264         cstr_free(&str);
2265     }
2266     ret = tcc_parse_args(s, argc, argv);
2267     dynarray_reset(&argv, &argc);
2268     return ret;
2269 }
2270
2271 PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time)
2272 {
2273     double tt;
2274     tt = (double)total_time / 1000000.0;
2275     if (tt < 0.001)
2276         tt = 0.001;
2277     if (total_bytes < 1)
2278         total_bytes = 1;
2279     fprintf(stderr, "%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
2280            tok_ident - TOK_IDENT, total_lines, total_bytes,
2281            tt, (int)(total_lines / tt),
2282            total_bytes / tt / 1000000.0);
2283 }
2284
2285 PUB_FUNC void tcc_set_environment(TCCState *s)
2286 {
2287     char * path;
2288
2289     path = getenv("C_INCLUDE_PATH");
2290     if(path != NULL) {
2291         tcc_add_include_path(s, path);
2292     }
2293     path = getenv("CPATH");
2294     if(path != NULL) {
2295         tcc_add_include_path(s, path);
2296     }
2297     path = getenv("LIBRARY_PATH");
2298     if(path != NULL) {
2299         tcc_add_library_path(s, path);
2300     }
2301 }