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 #define NEED_FLOAT_TYPES
  22 #include "tcc.h"
  23
  24 /********************************************************/
  25 /* global variables */
  26
  27 /* use GNU C extensions */
  28 ST_DATA int gnu_ext = 1;
  29
  30 /* use TinyCC extensions */
  31 ST_DATA int tcc_ext = 1;
  32
  33 /* XXX: get rid of this ASAP */
  34 ST_DATA struct TCCState *tcc_state;
  35
  36 #ifdef CONFIG_TCC_BACKTRACE
  37 ST_DATA int num_callers = 6;
  38 ST_DATA const char **rt_bound_error_msg;
  39 ST_DATA void *rt_prog_main;
  40 #endif
  41
  42 /********************************************************/
  43
  44 #ifndef NOTALLINONE
  45 #include "tccpp.c"
  46 #include "tccgen.c"
  47 #include "tccelf.c"
  48 #include "tccrun.c"
  49 #ifdef TCC_TARGET_I386
  50 #include "i386-gen.c"
  51 #endif
  52 #ifdef TCC_TARGET_ARM
  53 #include "arm-gen.c"
  54 #endif
  55 #ifdef TCC_TARGET_C67
  56 #include "c67-gen.c"
  57 #endif
  58 #ifdef TCC_TARGET_X86_64
  59 #include "x86_64-gen.c"
  60 #endif
  61 #ifdef CONFIG_TCC_ASM
  62 #include "tccasm.c"
  63 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
  64 #include "i386-asm.c"
  65 #endif
  66 #endif
  67 #ifdef TCC_TARGET_COFF
  68 #include "tcccoff.c"
  69 #endif
  70 #ifdef TCC_TARGET_PE
  71 #include "tccpe.c"
  72 #endif
  73 #endif /* ALL_IN_ONE */
  74
  75 /********************************************************/
  76 #ifndef CONFIG_TCC_ASM
  77 ST_FUNC void asm_instr(void)
  78 {
  79     error("inline asm() not supported");
  80 }
  81 ST_FUNC void asm_global_instr(void)
  82 {
  83     error("inline asm() not supported");
  84 }
  85 #endif
  86
  87 /********************************************************/
  88
  89 #ifdef _WIN32
  90 static char *normalize_slashes(char *path)
  91 {
  92     char *p;
  93     for (p = path; *p; ++p)
  94         if (*p == '\\')
  95             *p = '/';
  96     return path;
  97 }
  98
  99 static HMODULE tcc_module;
 100
 101 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
 102 static void tcc_set_lib_path_w32(TCCState *s)
 103 {
 104     char path[1024], *p;
 105     GetModuleFileNameA(tcc_module, path, sizeof path);
 106     p = tcc_basename(normalize_slashes(strlwr(path)));
 107     if (p - 5 > path && 0 == strncmp(p - 5, "/bin/", 5))
 108         p -= 5;
 109     else if (p > path)
 110         p--;
 111     *p = 0;
 112     tcc_set_lib_path(s, path);
 113 }
 114
 115 #ifndef CONFIG_TCC_STATIC
 116 void dlclose(void *p)
 117 {
 118     FreeLibrary((HMODULE)p);
 119 }
 120 #endif
 121
 122 #ifdef LIBTCC_AS_DLL
 123 BOOL WINAPI DllMain (HANDLE hDll, DWORD dwReason, LPVOID lpReserved)
 124 {
 125     if (DLL_PROCESS_ATTACH == dwReason)
 126         tcc_module = hDll;
 127     return TRUE;
 128 }
 129 #endif
 130 #endif
 131
 132 /********************************************************/
 133 /* copy a string and truncate it. */
 134 PUB_FUNC char *pstrcpy(char *buf, int buf_size, const char *s)
 135 {
 136     char *q, *q_end;
 137     int c;
 138
 139     if (buf_size > 0) {
 140         q = buf;
 141         q_end = buf + buf_size - 1;
 142         while (q < q_end) {
 143             c = *s++;
 144             if (c == '\0')
 145                 break;
 146             *q++ = c;
 147         }
 148         *q = '\0';
 149     }
 150     return buf;
 151 }
 152
 153 /* strcat and truncate. */
 154 PUB_FUNC char *pstrcat(char *buf, int buf_size, const char *s)
 155 {
 156     int len;
 157     len = strlen(buf);
 158     if (len < buf_size)
 159         pstrcpy(buf + len, buf_size - len, s);
 160     return buf;
 161 }
 162
 163 /* extract the basename of a file */
 164 PUB_FUNC char *tcc_basename(const char *name)
 165 {
 166     char *p = strchr(name, 0);
 167     while (p > name && !IS_PATHSEP(p[-1]))
 168         --p;
 169     return p;
 170 }
 171
 172 /* extract extension part of a file
 173  *
 174  * (if no extension, return pointer to end-of-string)
 175  */
 176 PUB_FUNC char *tcc_fileextension (const char *name)
 177 {
 178     char *b = tcc_basename(name);
 179     char *e = strrchr(b, '.');
 180     return e ? e : strchr(b, 0);
 181 }
 182
 183 /********************************************************/
 184 /* memory management */
 185
 186 #undef free
 187 #undef malloc
 188 #undef realloc
 189
 190 #ifdef MEM_DEBUG
 191 int mem_cur_size;
 192 int mem_max_size;
 193 unsigned malloc_usable_size(void*);
 194 #endif
 195
 196 PUB_FUNC void tcc_free(void *ptr)
 197 {
 198 #ifdef MEM_DEBUG
 199     mem_cur_size -= malloc_usable_size(ptr);
 200 #endif
 201     free(ptr);
 202 }
 203
 204 PUB_FUNC void *tcc_malloc(unsigned long size)
 205 {
 206     void *ptr;
 207     ptr = malloc(size);
 208     if (!ptr && size)
 209         error("memory full");
 210 #ifdef MEM_DEBUG
 211     mem_cur_size += malloc_usable_size(ptr);
 212     if (mem_cur_size > mem_max_size)
 213         mem_max_size = mem_cur_size;
 214 #endif
 215     return ptr;
 216 }
 217
 218 PUB_FUNC void *tcc_mallocz(unsigned long size)
 219 {
 220     void *ptr;
 221     ptr = tcc_malloc(size);
 222     memset(ptr, 0, size);
 223     return ptr;
 224 }
 225
 226 PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
 227 {
 228     void *ptr1;
 229 #ifdef MEM_DEBUG
 230     mem_cur_size -= malloc_usable_size(ptr);
 231 #endif
 232     ptr1 = realloc(ptr, size);
 233 #ifdef MEM_DEBUG
 234     /* NOTE: count not correct if alloc error, but not critical */
 235     mem_cur_size += malloc_usable_size(ptr1);
 236     if (mem_cur_size > mem_max_size)
 237         mem_max_size = mem_cur_size;
 238 #endif
 239     return ptr1;
 240 }
 241
 242 PUB_FUNC char *tcc_strdup(const char *str)
 243 {
 244     char *ptr;
 245     ptr = tcc_malloc(strlen(str) + 1);
 246     strcpy(ptr, str);
 247     return ptr;
 248 }
 249
 250 /* out must not point to a valid dynarray since a new one is created */
 251 PUB_FUNC int tcc_split_path_components(const char *in,
 252                                        const char * const *prefixs,
 253                                        int nb_prefixs, char ***out)
 254 {
 255         int i, nb_components = 0;
 256         char *path_component;
 257         const char *end_component;
 258         size_t path_size;
 259
 260         *out = NULL;
 261         end_component = in;
 262         do {
 263             while (*end_component && *end_component != ':')
 264                 ++end_component;
 265             for (i = 0; i < nb_prefixs; i++) {
 266                 path_size = (strlen(prefixs[i]) + 1) * sizeof(char)
 267                             + (end_component - in);
 268                 path_component = tcc_malloc(path_size);
 269                 pstrcpy(path_component, path_size, prefixs[i]);
 270                 pstrcat(path_component, path_size, in);
 271                 dynarray_add((void ***) out, &nb_components, path_component);
 272             }
 273             in = ++end_component;
 274         } while (*end_component);
 275         return nb_components;
 276 }
 277
 278 PUB_FUNC void tcc_memstats(void)
 279 {
 280 #ifdef MEM_DEBUG
 281     printf("memory in use: %d\n", mem_cur_size);
 282 #endif
 283 }
 284
 285 #define free(p) use_tcc_free(p)
 286 #define malloc(s) use_tcc_malloc(s)
 287 #define realloc(p, s) use_tcc_realloc(p, s)
 288
 289 /********************************************************/
 290 /* dynarrays */
 291
 292 PUB_FUNC void dynarray_add(void ***ptab, int *nb_ptr, void *data)
 293 {
 294     int nb, nb_alloc;
 295     void **pp;
 296
 297     nb = *nb_ptr;
 298     pp = *ptab;
 299     /* every power of two we double array size */
 300     if ((nb & (nb - 1)) == 0) {
 301         if (!nb)
 302             nb_alloc = 1;
 303         else
 304             nb_alloc = nb * 2;
 305         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 306         if (!pp)
 307             error("memory full");
 308         *ptab = pp;
 309     }
 310     pp[nb++] = data;
 311     *nb_ptr = nb;
 312 }
 313
 314 PUB_FUNC void dynarray_reset(void *pp, int *n)
 315 {
 316     void **p;
 317     for (p = *(void***)pp; *n; ++p, --*n)
 318         if (*p)
 319             tcc_free(*p);
 320     tcc_free(*(void**)pp);
 321     *(void**)pp = NULL;
 322 }
 323
 324 /* we use our own 'finite' function to avoid potential problems with
 325    non standard math libs */
 326 /* XXX: endianness dependent */
 327 ST_FUNC int ieee_finite(double d)
 328 {
 329     int *p = (int *)&d;
 330     return ((unsigned)((p[1] | 0x800fffff) + 1)) >> 31;
 331 }
 332
 333 /********************************************************/
 334
 335 ST_FUNC Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags)
 336 {
 337     Section *sec;
 338
 339     sec = tcc_mallocz(sizeof(Section) + strlen(name));
 340     strcpy(sec->name, name);
 341     sec->sh_type = sh_type;
 342     sec->sh_flags = sh_flags;
 343     switch(sh_type) {
 344     case SHT_HASH:
 345     case SHT_REL:
 346     case SHT_RELA:
 347     case SHT_DYNSYM:
 348     case SHT_SYMTAB:
 349     case SHT_DYNAMIC:
 350         sec->sh_addralign = 4;
 351         break;
 352     case SHT_STRTAB:
 353         sec->sh_addralign = 1;
 354         break;
 355     default:
 356         sec->sh_addralign = 32; /* default conservative alignment */
 357         break;
 358     }
 359
 360     if (sh_flags & SHF_PRIVATE) {
 361         dynarray_add((void ***)&s1->priv_sections, &s1->nb_priv_sections, sec);
 362     } else {
 363         sec->sh_num = s1->nb_sections;
 364         dynarray_add((void ***)&s1->sections, &s1->nb_sections, sec);
 365     }
 366
 367     return sec;
 368 }
 369
 370 static void free_section(Section *s)
 371 {
 372     tcc_free(s->data);
 373 }
 374
 375 /* realloc section and set its content to zero */
 376 ST_FUNC void section_realloc(Section *sec, unsigned long new_size)
 377 {
 378     unsigned long size;
 379     unsigned char *data;
 380
 381     size = sec->data_allocated;
 382     if (size == 0)
 383         size = 1;
 384     while (size < new_size)
 385         size = size * 2;
 386     data = tcc_realloc(sec->data, size);
 387     if (!data)
 388         error("memory full");
 389     memset(data + sec->data_allocated, 0, size - sec->data_allocated);
 390     sec->data = data;
 391     sec->data_allocated = size;
 392 }
 393
 394 /* reserve at least 'size' bytes in section 'sec' from
 395    sec->data_offset. */
 396 ST_FUNC void *section_ptr_add(Section *sec, unsigned long size)
 397 {
 398     unsigned long offset, offset1;
 399
 400     offset = sec->data_offset;
 401     offset1 = offset + size;
 402     if (offset1 > sec->data_allocated)
 403         section_realloc(sec, offset1);
 404     sec->data_offset = offset1;
 405     return sec->data + offset;
 406 }
 407
 408 /* reserve at least 'size' bytes from section start */
 409 ST_FUNC void section_reserve(Section *sec, unsigned long size)
 410 {
 411     if (size > sec->data_allocated)
 412         section_realloc(sec, size);
 413     if (size > sec->data_offset)
 414         sec->data_offset = size;
 415 }
 416
 417 /* return a reference to a section, and create it if it does not
 418    exists */
 419 ST_FUNC Section *find_section(TCCState *s1, const char *name)
 420 {
 421     Section *sec;
 422     int i;
 423     for(i = 1; i < s1->nb_sections; i++) {
 424         sec = s1->sections[i];
 425         if (!strcmp(name, sec->name))
 426             return sec;
 427     }
 428     /* sections are created as PROGBITS */
 429     return new_section(s1, name, SHT_PROGBITS, SHF_ALLOC);
 430 }
 431
 432 /* update sym->c so that it points to an external symbol in section
 433    'section' with value 'value' */
 434 ST_FUNC void put_extern_sym2(Sym *sym, Section *section,
 435                             unsigned long value, unsigned long size,
 436                             int can_add_underscore)
 437 {
 438     int sym_type, sym_bind, sh_num, info, other;
 439     ElfW(Sym) *esym;
 440     const char *name;
 441     char buf1[256];
 442
 443     if (section == NULL)
 444         sh_num = SHN_UNDEF;
 445     else if (section == SECTION_ABS)
 446         sh_num = SHN_ABS;
 447     else
 448         sh_num = section->sh_num;
 449
 450     if ((sym->type.t & VT_BTYPE) == VT_FUNC) {
 451         sym_type = STT_FUNC;
 452     } else if ((sym->type.t & VT_BTYPE) == VT_VOID) {
 453         sym_type = STT_NOTYPE;
 454     } else {
 455         sym_type = STT_OBJECT;
 456     }
 457
 458     if (sym->type.t & VT_STATIC)
 459         sym_bind = STB_LOCAL;
 460     else {
 461         if (sym->type.t & VT_WEAK)
 462             sym_bind = STB_WEAK;
 463         else
 464             sym_bind = STB_GLOBAL;
 465     }
 466
 467     if (!sym->c) {
 468         name = get_tok_str(sym->v, NULL);
 469 #ifdef CONFIG_TCC_BCHECK
 470         if (tcc_state->do_bounds_check) {
 471             char buf[32];
 472
 473             /* XXX: avoid doing that for statics ? */
 474             /* if bound checking is activated, we change some function
 475                names by adding the "__bound" prefix */
 476             switch(sym->v) {
 477 #ifdef TCC_TARGET_PE
 478             /* XXX: we rely only on malloc hooks */
 479             case TOK_malloc:
 480             case TOK_free:
 481             case TOK_realloc:
 482             case TOK_memalign:
 483             case TOK_calloc:
 484 #endif
 485             case TOK_memcpy:
 486             case TOK_memmove:
 487             case TOK_memset:
 488             case TOK_strlen:
 489             case TOK_strcpy:
 490             case TOK_alloca:
 491                 strcpy(buf, "__bound_");
 492                 strcat(buf, name);
 493                 name = buf;
 494                 break;
 495             }
 496         }
 497 #endif
 498         other = 0;
 499
 500 #ifdef TCC_TARGET_PE
 501         if (sym->type.t & VT_EXPORT)
 502             other |= 1;
 503         if (sym_type == STT_FUNC && sym->type.ref) {
 504             int attr = sym->type.ref->r;
 505             if (FUNC_EXPORT(attr))
 506                 other |= 1;
 507             if (FUNC_CALL(attr) == FUNC_STDCALL && can_add_underscore) {
 508                 sprintf(buf1, "_%s@%d", name, FUNC_ARGS(attr) * PTR_SIZE);
 509                 name = buf1;
 510                 other |= 2;
 511                 can_add_underscore = 0;
 512             }
 513         } else {
 514             if (find_elf_sym(tcc_state->dynsymtab_section, name))
 515                 other |= 4;
 516             if (sym->type.t & VT_IMPORT)
 517                 other |= 4;
 518         }
 519 #endif
 520         if (tcc_state->leading_underscore && can_add_underscore) {
 521             buf1[0] = '_';
 522             pstrcpy(buf1 + 1, sizeof(buf1) - 1, name);
 523             name = buf1;
 524         }
 525         if (sym->asm_label) {
 526             name = sym->asm_label;
 527         }
 528         info = ELFW(ST_INFO)(sym_bind, sym_type);
 529         sym->c = add_elf_sym(symtab_section, value, size, info, other, sh_num, name);
 530     } else {
 531         esym = &((ElfW(Sym) *)symtab_section->data)[sym->c];
 532         esym->st_value = value;
 533         esym->st_size = size;
 534         esym->st_shndx = sh_num;
 535     }
 536 }
 537
 538 ST_FUNC void put_extern_sym(Sym *sym, Section *section,
 539                            unsigned long value, unsigned long size)
 540 {
 541     put_extern_sym2(sym, section, value, size, 1);
 542 }
 543
 544 /* add a new relocation entry to symbol 'sym' in section 's' */
 545 ST_FUNC void greloc(Section *s, Sym *sym, unsigned long offset, int type)
 546 {
 547     int c = 0;
 548     if (sym) {
 549         if (0 == sym->c)
 550             put_extern_sym(sym, NULL, 0, 0);
 551         c = sym->c;
 552     }
 553     /* now we can add ELF relocation info */
 554     put_elf_reloc(symtab_section, s, offset, type, c);
 555 }
 556
 557 /********************************************************/
 558
 559 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 560 {
 561     int len;
 562     len = strlen(buf);
 563     vsnprintf(buf + len, buf_size - len, fmt, ap);
 564 }
 565
 566 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 567 {
 568     va_list ap;
 569     va_start(ap, fmt);
 570     strcat_vprintf(buf, buf_size, fmt, ap);
 571     va_end(ap);
 572 }
 573
 574 static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 575 {
 576     char buf[2048];
 577     BufferedFile **f;
 578
 579     buf[0] = '\0';
 580     if (file) {
 581         for(f = s1->include_stack; f < s1->include_stack_ptr; f++)
 582             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 583                           (*f)->filename, (*f)->line_num);
 584         if (file->line_num > 0) {
 585             strcat_printf(buf, sizeof(buf),
 586                           "%s:%d: ", file->filename, file->line_num);
 587         } else {
 588             strcat_printf(buf, sizeof(buf),
 589                           "%s: ", file->filename);
 590         }
 591     } else {
 592         strcat_printf(buf, sizeof(buf),
 593                       "tcc: ");
 594     }
 595     if (is_warning)
 596         strcat_printf(buf, sizeof(buf), "warning: ");
 597     else
 598         strcat_printf(buf, sizeof(buf), "error: ");
 599     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 600
 601     if (!s1->error_func) {
 602         /* default case: stderr */
 603         fprintf(stderr, "%s\n", buf);
 604     } else {
 605         s1->error_func(s1->error_opaque, buf);
 606     }
 607     if (!is_warning || s1->warn_error)
 608         s1->nb_errors++;
 609 }
 610
 611 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque,
 612                         void (*error_func)(void *opaque, const char *msg))
 613 {
 614     s->error_opaque = error_opaque;
 615     s->error_func = error_func;
 616 }
 617
 618 /* error without aborting current compilation */
 619 PUB_FUNC void error_noabort(const char *fmt, ...)
 620 {
 621     TCCState *s1 = tcc_state;
 622     va_list ap;
 623
 624     va_start(ap, fmt);
 625     error1(s1, 0, fmt, ap);
 626     va_end(ap);
 627 }
 628
 629 PUB_FUNC void error(const char *fmt, ...)
 630 {
 631     TCCState *s1 = tcc_state;
 632     va_list ap;
 633
 634     va_start(ap, fmt);
 635     error1(s1, 0, fmt, ap);
 636     va_end(ap);
 637     /* better than nothing: in some cases, we accept to handle errors */
 638     if (s1->error_set_jmp_enabled) {
 639         longjmp(s1->error_jmp_buf, 1);
 640     } else {
 641         /* XXX: eliminate this someday */
 642         exit(1);
 643     }
 644 }
 645
 646 PUB_FUNC void expect(const char *msg)
 647 {
 648     error("%s expected", msg);
 649 }
 650
 651 PUB_FUNC void warning(const char *fmt, ...)
 652 {
 653     TCCState *s1 = tcc_state;
 654     va_list ap;
 655
 656     if (s1->warn_none)
 657         return;
 658
 659     va_start(ap, fmt);
 660     error1(s1, 1, fmt, ap);
 661     va_end(ap);
 662 }
 663
 664 /********************************************************/
 665 /* I/O layer */
 666
 667 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 668 {
 669     BufferedFile *bf;
 670     int buflen = initlen ? initlen : IO_BUF_SIZE;
 671
 672     bf = tcc_malloc(sizeof(BufferedFile) + buflen);
 673     bf->buf_ptr = bf->buffer;
 674     bf->buf_end = bf->buffer + initlen;
 675     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 676     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 677 #ifdef _WIN32
 678     normalize_slashes(bf->filename);
 679 #endif
 680     bf->line_num = 1;
 681     bf->ifndef_macro = 0;
 682     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 683     bf->fd = -1;
 684     bf->prev = file;
 685     file = bf;
 686 }
 687
 688 ST_FUNC void tcc_close(void)
 689 {
 690     BufferedFile *bf = file;
 691     if (bf->fd > 0) {
 692         close(bf->fd);
 693         total_lines += bf->line_num;
 694     }
 695     file = bf->prev;
 696     tcc_free(bf);
 697 }
 698
 699 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
 700 {
 701     int fd;
 702     if (strcmp(filename, "-") == 0)
 703         fd = 0, filename = "stdin";
 704     else
 705         fd = open(filename, O_RDONLY | O_BINARY);
 706     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 707         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 708                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 709     if (fd < 0)
 710         return -1;
 711
 712     tcc_open_bf(s1, filename, 0);
 713     file->fd = fd;
 714     return fd;
 715 }
 716
 717 /* compile the C file opened in 'file'. Return non zero if errors. */
 718 static int tcc_compile(TCCState *s1)
 719 {
 720     Sym *define_start;
 721     SValue *pvtop;
 722     char buf[512];
 723     volatile int section_sym;
 724
 725 #ifdef INC_DEBUG
 726     printf("%s: **** new file\n", file->filename);
 727 #endif
 728     preprocess_init(s1);
 729
 730     cur_text_section = NULL;
 731     funcname = "";
 732     anon_sym = SYM_FIRST_ANOM;
 733
 734     /* file info: full path + filename */
 735     section_sym = 0; /* avoid warning */
 736     if (s1->do_debug) {
 737         section_sym = put_elf_sym(symtab_section, 0, 0,
 738                                   ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
 739                                   text_section->sh_num, NULL);
 740         getcwd(buf, sizeof(buf));
 741 #ifdef _WIN32
 742         normalize_slashes(buf);
 743 #endif
 744         pstrcat(buf, sizeof(buf), "/");
 745         put_stabs_r(buf, N_SO, 0, 0,
 746                     text_section->data_offset, text_section, section_sym);
 747         put_stabs_r(file->filename, N_SO, 0, 0,
 748                     text_section->data_offset, text_section, section_sym);
 749     }
 750     /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
 751        symbols can be safely used */
 752     put_elf_sym(symtab_section, 0, 0,
 753                 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
 754                 SHN_ABS, file->filename);
 755
 756     /* define some often used types */
 757     int_type.t = VT_INT;
 758
 759     char_pointer_type.t = VT_BYTE;
 760     mk_pointer(&char_pointer_type);
 761
 762     func_old_type.t = VT_FUNC;
 763     func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
 764
 765 #if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP)
 766     float_type.t = VT_FLOAT;
 767     double_type.t = VT_DOUBLE;
 768
 769     func_float_type.t = VT_FUNC;
 770     func_float_type.ref = sym_push(SYM_FIELD, &float_type, FUNC_CDECL, FUNC_OLD);
 771     func_double_type.t = VT_FUNC;
 772     func_double_type.ref = sym_push(SYM_FIELD, &double_type, FUNC_CDECL, FUNC_OLD);
 773 #endif
 774
 775 #if 0
 776     /* define 'void *alloca(unsigned int)' builtin function */
 777     {
 778         Sym *s1;
 779
 780         p = anon_sym++;
 781         sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
 782         s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
 783         s1->next = NULL;
 784         sym->next = s1;
 785         sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
 786     }
 787 #endif
 788
 789     define_start = define_stack;
 790     nocode_wanted = 1;
 791
 792     if (setjmp(s1->error_jmp_buf) == 0) {
 793         s1->nb_errors = 0;
 794         s1->error_set_jmp_enabled = 1;
 795
 796         ch = file->buf_ptr[0];
 797         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 798         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
 799         pvtop = vtop;
 800         next();
 801         decl(VT_CONST);
 802         if (tok != TOK_EOF)
 803             expect("declaration");
 804         if (pvtop != vtop)
 805             warning("internal compiler error: vstack leak? (%d)", vtop - pvtop);
 806
 807         /* end of translation unit info */
 808         if (s1->do_debug) {
 809             put_stabs_r(NULL, N_SO, 0, 0,
 810                         text_section->data_offset, text_section, section_sym);
 811         }
 812     }
 813
 814     s1->error_set_jmp_enabled = 0;
 815
 816     /* reset define stack, but leave -Dsymbols (may be incorrect if
 817        they are undefined) */
 818     free_defines(define_start);
 819
 820     gen_inline_functions();
 821
 822     sym_pop(&global_stack, NULL);
 823     sym_pop(&local_stack, NULL);
 824
 825     return s1->nb_errors != 0 ? -1 : 0;
 826 }
 827
 828 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 829 {
 830     int len, ret;
 831     len = strlen(str);
 832
 833     tcc_open_bf(s, "<string>", len);
 834     memcpy(file->buffer, str, len);
 835     ret = tcc_compile(s);
 836     tcc_close();
 837     return ret;
 838 }
 839
 840 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
 841 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 842 {
 843     int len1, len2;
 844     /* default value */
 845     if (!value)
 846         value = "1";
 847     len1 = strlen(sym);
 848     len2 = strlen(value);
 849
 850     /* init file structure */
 851     tcc_open_bf(s1, "<define>", len1 + len2 + 1);
 852     memcpy(file->buffer, sym, len1);
 853     file->buffer[len1] = ' ';
 854     memcpy(file->buffer + len1 + 1, value, len2);
 855
 856     /* parse with define parser */
 857     ch = file->buf_ptr[0];
 858     next_nomacro();
 859     parse_define();
 860
 861     tcc_close();
 862 }
 863
 864 /* undefine a preprocessor symbol */
 865 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 866 {
 867     TokenSym *ts;
 868     Sym *s;
 869     ts = tok_alloc(sym, strlen(sym));
 870     s = define_find(ts->tok);
 871     /* undefine symbol by putting an invalid name */
 872     if (s)
 873         define_undef(s);
 874 }
 875
 876 static void tcc_cleanup(void)
 877 {
 878     int i, n;
 879
 880     if (NULL == tcc_state)
 881         return;
 882     tcc_state = NULL;
 883
 884     /* free -D defines */
 885     free_defines(NULL);
 886
 887     /* free tokens */
 888     n = tok_ident - TOK_IDENT;
 889     for(i = 0; i < n; i++)
 890         tcc_free(table_ident[i]);
 891     tcc_free(table_ident);
 892
 893     /* free sym_pools */
 894     dynarray_reset(&sym_pools, &nb_sym_pools);
 895     /* string buffer */
 896     cstr_free(&tokcstr);
 897     /* reset symbol stack */
 898     sym_free_first = NULL;
 899     /* cleanup from error/setjmp */
 900     macro_ptr = NULL;
 901 }
 902
 903 LIBTCCAPI TCCState *tcc_new(void)
 904 {
 905     TCCState *s;
 906     char buffer[100];
 907     int a,b,c;
 908
 909     tcc_cleanup();
 910
 911     s = tcc_mallocz(sizeof(TCCState));
 912     if (!s)
 913         return NULL;
 914     tcc_state = s;
 915 #ifdef _WIN32
 916     tcc_set_lib_path_w32(s);
 917 #else
 918     tcc_set_lib_path(s, CONFIG_TCCDIR);
 919 #endif
 920     s->output_type = TCC_OUTPUT_MEMORY;
 921     preprocess_new();
 922     s->include_stack_ptr = s->include_stack;
 923
 924     /* we add dummy defines for some special macros to speed up tests
 925        and to have working defined() */
 926     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
 927     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
 928     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
 929     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
 930
 931     /* standard defines */
 932     tcc_define_symbol(s, "__STDC__", NULL);
 933     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 934 #if defined(TCC_TARGET_I386)
 935     tcc_define_symbol(s, "__i386__", NULL);
 936     tcc_define_symbol(s, "__i386", NULL);
 937     tcc_define_symbol(s, "i386", NULL);
 938 #endif
 939 #if defined(TCC_TARGET_X86_64)
 940     tcc_define_symbol(s, "__x86_64__", NULL);
 941 #endif
 942 #if defined(TCC_TARGET_ARM)
 943     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 944     tcc_define_symbol(s, "__arm_elf__", NULL);
 945     tcc_define_symbol(s, "__arm_elf", NULL);
 946     tcc_define_symbol(s, "arm_elf", NULL);
 947     tcc_define_symbol(s, "__arm__", NULL);
 948     tcc_define_symbol(s, "__arm", NULL);
 949     tcc_define_symbol(s, "arm", NULL);
 950     tcc_define_symbol(s, "__APCS_32__", NULL);
 951 #endif
 952 #ifdef TCC_TARGET_PE
 953     tcc_define_symbol(s, "_WIN32", NULL);
 954 #ifdef TCC_TARGET_X86_64
 955     tcc_define_symbol(s, "_WIN64", NULL);
 956 #endif
 957 #else
 958     tcc_define_symbol(s, "__unix__", NULL);
 959     tcc_define_symbol(s, "__unix", NULL);
 960     tcc_define_symbol(s, "unix", NULL);
 961 #if defined(__FreeBSD__)
 962 #define str(s) #s
 963     tcc_define_symbol(s, "__FreeBSD__", str( __FreeBSD__));
 964 #undef str
 965 #endif
 966 #if defined(__FreeBSD_kernel__)
 967     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
 968 #endif
 969 #if defined(__linux)
 970     tcc_define_symbol(s, "__linux__", NULL);
 971     tcc_define_symbol(s, "__linux", NULL);
 972 #endif
 973 #endif
 974     /* tiny C specific defines */
 975     sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
 976     sprintf(buffer, "%d", a*10000 + b*100 + c);
 977     tcc_define_symbol(s, "__TINYC__", buffer);
 978
 979     /* tiny C & gcc defines */
 980 #if defined TCC_TARGET_PE && defined TCC_TARGET_X86_64
 981     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
 982     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
 983 #else
 984     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 985     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 986 #endif
 987
 988 #ifdef TCC_TARGET_PE
 989     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
 990 #else
 991     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
 992 #endif
 993
 994     /* glibc defines */
 995     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)", "name proto __asm__ (#alias) __THROW");
 996
 997 #ifndef TCC_TARGET_PE
 998     /* default library paths */
 999     tcc_add_library_path(s, CONFIG_TCC_CRT_PREFIX);
1000     tcc_add_library_path(s, CONFIG_SYSROOT CONFIG_TCC_LDDIR);
1001     tcc_add_library_path(s, CONFIG_SYSROOT "/usr/local"CONFIG_TCC_LDDIR);
1002 #ifdef CONFIG_TCC_EXTRA_LDDIR
1003     {
1004         int i, nb_extra_lddirs, nb_prefixs;
1005         char **extra_lddirs;
1006         char extra_lddir_str[] = CONFIG_TCC_EXTRA_LDDIR;
1007         const char lddir_prefix1[] = CONFIG_SYSROOT;
1008         const char lddir_prefix2[] = CONFIG_SYSROOT "/usr/local";
1009         const char * const lddir_prefixs[] = {lddir_prefix1, lddir_prefix2};
1010
1011         nb_prefixs = sizeof lddir_prefixs / sizeof *lddir_prefixs;
1012         nb_extra_lddirs = tcc_split_path_components(CONFIG_TCC_EXTRA_LDDIR,
1013                                                     lddir_prefixs, nb_prefixs,
1014                                                     &extra_lddirs);
1015         for (i = 0; i < nb_extra_lddirs; i++)
1016             tcc_add_library_path(s, extra_lddirs[i]);
1017         dynarray_reset(&extra_lddirs, &nb_extra_lddirs);
1018     }
1019 #endif
1020 #endif
1021
1022     /* no section zero */
1023     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
1024
1025     /* create standard sections */
1026     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
1027     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
1028     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
1029
1030     /* symbols are always generated for linking stage */
1031     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
1032                                 ".strtab",
1033                                 ".hashtab", SHF_PRIVATE);
1034     strtab_section = symtab_section->link;
1035
1036     /* private symbol table for dynamic symbols */
1037     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
1038                                       ".dynstrtab",
1039                                       ".dynhashtab", SHF_PRIVATE);
1040     s->alacarte_link = 1;
1041     s->nocommon = 1;
1042
1043 #ifdef CHAR_IS_UNSIGNED
1044     s->char_is_unsigned = 1;
1045 #endif
1046     /* enable this if you want symbols with leading underscore on windows: */
1047 #if defined(TCC_TARGET_PE) && 0
1048     s->leading_underscore = 1;
1049 #endif
1050     if (s->section_align == 0)
1051         s->section_align = ELF_PAGE_SIZE;
1052 #ifdef TCC_TARGET_I386
1053     s->seg_size = 32;
1054 #endif
1055     return s;
1056 }
1057
1058 LIBTCCAPI void tcc_delete(TCCState *s1)
1059 {
1060     int i;
1061
1062     tcc_cleanup();
1063
1064     /* free all sections */
1065     for(i = 1; i < s1->nb_sections; i++)
1066         free_section(s1->sections[i]);
1067     dynarray_reset(&s1->sections, &s1->nb_sections);
1068
1069     for(i = 0; i < s1->nb_priv_sections; i++)
1070         free_section(s1->priv_sections[i]);
1071     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1072
1073     /* free any loaded DLLs */
1074     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1075         DLLReference *ref = s1->loaded_dlls[i];
1076         if ( ref->handle )
1077             dlclose(ref->handle);
1078     }
1079
1080     /* free loaded dlls array */
1081     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1082
1083     /* free library paths */
1084     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1085
1086     /* free include paths */
1087     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1088     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1089     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1090
1091     tcc_free(s1->tcc_lib_path);
1092
1093     dynarray_reset(&s1->input_files, &s1->nb_input_files);
1094     dynarray_reset(&s1->input_libs, &s1->nb_input_libs);
1095     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
1096
1097 #ifdef HAVE_SELINUX
1098     munmap (s1->write_mem, s1->mem_size);
1099     munmap (s1->runtime_mem, s1->mem_size);
1100 #else
1101     tcc_free(s1->runtime_mem);
1102 #endif
1103     tcc_free(s1);
1104 }
1105
1106 LIBTCCAPI int tcc_add_include_path(TCCState *s1, const char *pathname)
1107 {
1108     char *pathname1;
1109
1110     pathname1 = tcc_strdup(pathname);
1111     dynarray_add((void ***)&s1->include_paths, &s1->nb_include_paths, pathname1);
1112     return 0;
1113 }
1114
1115 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s1, const char *pathname)
1116 {
1117     char *pathname1;
1118
1119     pathname1 = tcc_strdup(pathname);
1120     dynarray_add((void ***)&s1->sysinclude_paths, &s1->nb_sysinclude_paths, pathname1);
1121     return 0;
1122 }
1123
1124 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1125 {
1126     const char *ext;
1127     ElfW(Ehdr) ehdr;
1128     int fd, ret, size;
1129
1130     /* find source file type with extension */
1131     ext = tcc_fileextension(filename);
1132     if (ext[0])
1133         ext++;
1134
1135 #ifdef CONFIG_TCC_ASM
1136     /* if .S file, define __ASSEMBLER__ like gcc does */
1137     if (!strcmp(ext, "S"))
1138         tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
1139 #endif
1140
1141     /* open the file */
1142     ret = tcc_open(s1, filename);
1143     if (ret < 0) {
1144         if (flags & AFF_PRINT_ERROR)
1145             error_noabort("file '%s' not found", filename);
1146         return ret;
1147     }
1148
1149     /* update target deps */
1150     dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1151             tcc_strdup(filename));
1152
1153     if (flags & AFF_PREPROCESS) {
1154         ret = tcc_preprocess(s1);
1155         goto the_end;
1156     }
1157
1158     if (!ext[0] || !PATHCMP(ext, "c")) {
1159         /* C file assumed */
1160         ret = tcc_compile(s1);
1161         goto the_end;
1162     }
1163
1164 #ifdef CONFIG_TCC_ASM
1165     if (!strcmp(ext, "S")) {
1166         /* preprocessed assembler */
1167         ret = tcc_assemble(s1, 1);
1168         goto the_end;
1169     }
1170
1171     if (!strcmp(ext, "s")) {
1172         /* non preprocessed assembler */
1173         ret = tcc_assemble(s1, 0);
1174         goto the_end;
1175     }
1176 #endif
1177
1178     fd = file->fd;
1179     /* assume executable format: auto guess file type */
1180     size = read(fd, &ehdr, sizeof(ehdr));
1181     lseek(fd, 0, SEEK_SET);
1182     if (size <= 0) {
1183         error_noabort("could not read header");
1184         goto the_end;
1185     }
1186
1187     if (size == sizeof(ehdr) &&
1188         ehdr.e_ident[0] == ELFMAG0 &&
1189         ehdr.e_ident[1] == ELFMAG1 &&
1190         ehdr.e_ident[2] == ELFMAG2 &&
1191         ehdr.e_ident[3] == ELFMAG3) {
1192
1193         /* do not display line number if error */
1194         file->line_num = 0;
1195         if (ehdr.e_type == ET_REL) {
1196             ret = tcc_load_object_file(s1, fd, 0);
1197             goto the_end;
1198
1199         }
1200 #ifndef TCC_TARGET_PE
1201         if (ehdr.e_type == ET_DYN) {
1202             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1203                 void *h;
1204                 h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1205                 if (h)
1206                     ret = 0;
1207             } else {
1208                 ret = tcc_load_dll(s1, fd, filename,
1209                                    (flags & AFF_REFERENCED_DLL) != 0);
1210             }
1211             goto the_end;
1212         }
1213 #endif
1214         error_noabort("unrecognized ELF file");
1215         goto the_end;
1216     }
1217
1218     if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
1219         file->line_num = 0; /* do not display line number if error */
1220         ret = tcc_load_archive(s1, fd);
1221         goto the_end;
1222     }
1223
1224 #ifdef TCC_TARGET_COFF
1225     if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
1226         ret = tcc_load_coff(s1, fd);
1227         goto the_end;
1228     }
1229 #endif
1230
1231 #ifdef TCC_TARGET_PE
1232     ret = pe_load_file(s1, filename, fd);
1233 #else
1234     /* as GNU ld, consider it is an ld script if not recognized */
1235     ret = tcc_load_ldscript(s1);
1236 #endif
1237     if (ret < 0)
1238         error_noabort("unrecognized file type");
1239
1240 the_end:
1241     tcc_close();
1242     return ret;
1243 }
1244
1245 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1246 {
1247     dynarray_add((void ***)&s->input_files, &s->nb_input_files, tcc_strdup(filename));
1248
1249     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1250         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS);
1251     else
1252         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR);
1253 }
1254
1255 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1256 {
1257     char *pathname1;
1258
1259     pathname1 = tcc_strdup(pathname);
1260     dynarray_add((void ***)&s->library_paths, &s->nb_library_paths, pathname1);
1261     return 0;
1262 }
1263
1264 /* find and load a dll. Return non zero if not found */
1265 /* XXX: add '-rpath' option support ? */
1266 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1267 {
1268     char buf[1024];
1269     int i;
1270
1271     for(i = 0; i < s->nb_library_paths; i++) {
1272         snprintf(buf, sizeof(buf), "%s/%s",
1273                  s->library_paths[i], filename);
1274         if (tcc_add_file_internal(s, buf, flags) == 0)
1275             return 0;
1276     }
1277     return -1;
1278 }
1279
1280 /* the library name is the same as the argument of the '-l' option */
1281 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1282 {
1283     char buf[1024];
1284     int i;
1285
1286     dynarray_add((void ***)&s->input_libs, &s->nb_input_libs, tcc_strdup(libraryname));
1287
1288     /* first we look for the dynamic library if not static linking */
1289     if (!s->static_link) {
1290 #ifdef TCC_TARGET_PE
1291         if (pe_add_dll(s, libraryname) == 0)
1292             return 0;
1293 #else
1294         snprintf(buf, sizeof(buf), "lib%s.so", libraryname);
1295         if (tcc_add_dll(s, buf, 0) == 0)
1296             return 0;
1297 #endif
1298     }
1299     /* then we look for the static library */
1300     for(i = 0; i < s->nb_library_paths; i++) {
1301         snprintf(buf, sizeof(buf), "%s/lib%s.a",
1302                  s->library_paths[i], libraryname);
1303         if (tcc_add_file_internal(s, buf, 0) == 0)
1304             return 0;
1305     }
1306     return -1;
1307 }
1308
1309 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1310 {
1311 #ifdef TCC_TARGET_PE
1312     pe_putimport(s, 0, name, val);
1313 #else
1314     add_elf_sym(symtab_section, (uplong)val, 0,
1315                 ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1316                 SHN_ABS, name);
1317 #endif
1318     return 0;
1319 }
1320
1321 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
1322 {
1323     char buf[1024];
1324
1325     s->output_type = output_type;
1326
1327     if (!s->nostdinc) {
1328         /* default include paths */
1329         /* -isystem paths have already been handled */
1330 #ifndef TCC_TARGET_PE
1331         {
1332             int i, nb_extra_incdirs, nb_prefixs;
1333             char **extra_incdirs;
1334             const char incdir_prefix1[] = CONFIG_SYSROOT "/usr/local/include";
1335             const char incdir_prefix2[] = CONFIG_SYSROOT "/usr/include";
1336             const char * const incdir_prefixs[] = {incdir_prefix1,
1337                                                    incdir_prefix2};
1338
1339             nb_prefixs = sizeof incdir_prefixs / sizeof *incdir_prefixs;
1340             nb_extra_incdirs = tcc_split_path_components(CONFIG_TCC_INCSUBDIR,
1341                                                         incdir_prefixs,
1342                                                         nb_prefixs,
1343                                                         &extra_incdirs);
1344             for (i = 0; i < nb_extra_incdirs; i++)
1345                 tcc_add_sysinclude_path(s, extra_incdirs[i]);
1346             dynarray_reset(&extra_incdirs, &nb_extra_incdirs);
1347         }
1348 #endif
1349         snprintf(buf, sizeof(buf), "%s/include", s->tcc_lib_path);
1350         tcc_add_sysinclude_path(s, buf);
1351 #ifdef TCC_TARGET_PE
1352         snprintf(buf, sizeof(buf), "%s/include/winapi", s->tcc_lib_path);
1353         tcc_add_sysinclude_path(s, buf);
1354 #endif
1355     }
1356
1357     /* if bound checking, then add corresponding sections */
1358 #ifdef CONFIG_TCC_BCHECK
1359     if (s->do_bounds_check) {
1360         /* define symbol */
1361         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1362         /* create bounds sections */
1363         bounds_section = new_section(s, ".bounds",
1364                                      SHT_PROGBITS, SHF_ALLOC);
1365         lbounds_section = new_section(s, ".lbounds",
1366                                       SHT_PROGBITS, SHF_ALLOC);
1367     }
1368 #endif
1369
1370     if (s->char_is_unsigned) {
1371         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
1372     }
1373
1374     /* add debug sections */
1375     if (s->do_debug) {
1376         /* stab symbols */
1377         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
1378         stab_section->sh_entsize = sizeof(Stab_Sym);
1379         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
1380         put_elf_str(stabstr_section, "");
1381         stab_section->link = stabstr_section;
1382         /* put first entry */
1383         put_stabs("", 0, 0, 0, 0);
1384     }
1385
1386     /* add libc crt1/crti objects */
1387 #ifndef TCC_TARGET_PE
1388     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1389         !s->nostdlib) {
1390         if (output_type != TCC_OUTPUT_DLL)
1391             tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crt1.o");
1392         tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crti.o");
1393     }
1394 #endif
1395
1396 #ifdef TCC_TARGET_PE
1397 #ifdef CONFIG_TCC_CROSSLIB
1398     snprintf(buf, sizeof(buf), "%s/" CONFIG_TCC_CROSSLIB, s->tcc_lib_path);
1399     tcc_add_library_path(s, buf);
1400 #endif
1401     snprintf(buf, sizeof(buf), "%s/lib", s->tcc_lib_path);
1402     tcc_add_library_path(s, buf);
1403 #ifdef _WIN32
1404     if (GetSystemDirectory(buf, sizeof buf))
1405         tcc_add_library_path(s, buf);
1406 #endif
1407 #endif
1408
1409     return 0;
1410 }
1411
1412 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1413 #define FD_INVERT 0x0002 /* invert value before storing */
1414
1415 typedef struct FlagDef {
1416     uint16_t offset;
1417     uint16_t flags;
1418     const char *name;
1419 } FlagDef;
1420
1421 static const FlagDef warning_defs[] = {
1422     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1423     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1424     { offsetof(TCCState, warn_error), 0, "error" },
1425     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1426       "implicit-function-declaration" },
1427 };
1428
1429 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1430                     const char *name, int value)
1431 {
1432     int i;
1433     const FlagDef *p;
1434     const char *r;
1435
1436     r = name;
1437     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
1438         r += 3;
1439         value = !value;
1440     }
1441     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1442         if (!strcmp(r, p->name))
1443             goto found;
1444     }
1445     return -1;
1446  found:
1447     if (p->flags & FD_INVERT)
1448         value = !value;
1449     *(int *)((uint8_t *)s + p->offset) = value;
1450     return 0;
1451 }
1452
1453 /* set/reset a warning */
1454 LIBTCCAPI int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1455 {
1456     int i;
1457     const FlagDef *p;
1458
1459     if (!strcmp(warning_name, "all")) {
1460         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1461             if (p->flags & WD_ALL)
1462                 *(int *)((uint8_t *)s + p->offset) = 1;
1463         }
1464         return 0;
1465     } else {
1466         return set_flag(s, warning_defs, countof(warning_defs),
1467                         warning_name, value);
1468     }
1469 }
1470
1471 static const FlagDef flag_defs[] = {
1472     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1473     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1474     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1475     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1476 };
1477
1478 /* set/reset a flag */
1479 PUB_FUNC int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1480 {
1481     return set_flag(s, flag_defs, countof(flag_defs),
1482                     flag_name, value);
1483 }
1484
1485
1486 static int strstart(const char *str, const char *val, char **ptr)
1487 {
1488     const char *p, *q;
1489     p = str;
1490     q = val;
1491     while (*q != '\0') {
1492         if (*p != *q)
1493             return 0;
1494         p++;
1495         q++;
1496     }
1497     if (ptr)
1498         *ptr = (char *) p;
1499     return 1;
1500 }
1501
1502
1503 /* Like strstart, but automatically takes into account that ld options can
1504  *
1505  * - start with double or single dash (e.g. '--soname' or '-soname')
1506  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1507  *   or '-Wl,-soname=x.so')
1508  *
1509  * you provide `val` always in 'option[=]' form (no leading -)
1510  */
1511 static int link_option(const char *str, const char *val, char **ptr)
1512 {
1513     const char *p, *q;
1514
1515     /* there should be 1 or 2 dashes */
1516     if (*str++ != '-')
1517         return 0;
1518     if (*str == '-')
1519         str++;
1520
1521     /* then str & val should match (potentialy up to '=') */
1522     p = str;
1523     q = val;
1524
1525     while (*q != '\0' && *q != '=') {
1526         if (*p != *q)
1527             return 0;
1528         p++;
1529         q++;
1530     }
1531
1532     /* '=' near eos means ',' or '=' is ok */
1533     if (*q == '=') {
1534         if (*p != ',' && *p != '=')
1535             return 0;
1536         p++;
1537         q++;
1538     }
1539
1540     if (ptr)
1541         *ptr = (char *) p;
1542     return 1;
1543 }
1544
1545
1546 /* set linker options */
1547 PUB_FUNC const char * tcc_set_linker(TCCState *s, char *option, int multi)
1548 {
1549     char *p = option;
1550     char *end;
1551
1552     while (option && *option) {
1553         end = NULL;
1554         if (link_option(option, "Bsymbolic", &p)) {
1555             s->symbolic = TRUE;
1556 #ifdef TCC_TARGET_PE
1557         } else if (link_option(option, "file-alignment=", &p)) {
1558             s->pe_file_align = strtoul(p, &end, 16);
1559 #endif
1560         } else if (link_option(option, "fini=", &p)) {
1561             s->fini_symbol = p;
1562             if (s->warn_unsupported)
1563                 warning("ignoring -fini %s", p);
1564
1565         } else if (link_option(option, "image-base=", &p)) {
1566             s->text_addr = strtoul(p, &end, 16);
1567             s->has_text_addr = 1;
1568         } else if (link_option(option, "init=", &p)) {
1569             s->init_symbol = p;
1570             if (s->warn_unsupported)
1571                 warning("ignoring -init %s", p);
1572
1573         } else if (link_option(option, "oformat=", &p)) {
1574 #if defined(TCC_TARGET_PE)
1575             if (strstart(p, "pe-", NULL)) {
1576 #else
1577 #if defined(TCC_TARGET_X86_64)
1578             if (strstart(p, "elf64-", NULL)) {
1579 #else
1580             if (strstart(p, "elf32-", NULL)) {
1581 #endif
1582 #endif
1583                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1584             } else if (!strcmp(p, "binary")) {
1585                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1586             } else
1587 #ifdef TCC_TARGET_COFF
1588             if (!strcmp(p, "coff")) {
1589                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1590             } else
1591 #endif
1592             {
1593                 return p;
1594             }
1595
1596         } else if (link_option(option, "rpath=", &p)) {
1597             s->rpath = p;
1598         } else if (link_option(option, "section-alignment=", &p)) {
1599             s->section_align = strtoul(p, &end, 16);
1600         } else if (link_option(option, "soname=", &p)) {
1601             s->soname = p;
1602             multi = 0;
1603 #ifdef TCC_TARGET_PE
1604         } else if (link_option(option, "subsystem=", &p)) {
1605 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1606             if (!strcmp(p, "native")) {
1607                 s->pe_subsystem = 1;
1608             } else if (!strcmp(p, "console")) {
1609                 s->pe_subsystem = 3;
1610             } else if (!strcmp(p, "gui")) {
1611                 s->pe_subsystem = 2;
1612             } else if (!strcmp(p, "posix")) {
1613                 s->pe_subsystem = 7;
1614             } else if (!strcmp(p, "efiapp")) {
1615                 s->pe_subsystem = 10;
1616             } else if (!strcmp(p, "efiboot")) {
1617                 s->pe_subsystem = 11;
1618             } else if (!strcmp(p, "efiruntime")) {
1619                 s->pe_subsystem = 12;
1620             } else if (!strcmp(p, "efirom")) {
1621                 s->pe_subsystem = 13;
1622 #elif defined(TCC_TARGET_ARM)
1623             if (!strcmp(p, "wince")) {
1624                 s->pe_subsystem = 9;
1625 #endif
1626             } else {
1627                 return p;
1628             }
1629 #endif
1630
1631         } else if (link_option(option, "Ttext=", &p)) {
1632             s->text_addr = strtoul(p, &end, 16);
1633             s->has_text_addr = 1;
1634
1635         } else {
1636             return option;
1637         }
1638
1639         if (multi) {
1640             option = NULL;
1641             p = strchr( (end) ? end : p, ',');
1642             if (p) {
1643                 *p = 0;    /* terminate last option */
1644                 option = ++p;
1645             }
1646         } else
1647             option = NULL;
1648     }
1649     return NULL;
1650 }
1651
1652 PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time)
1653 {
1654     double tt;
1655     tt = (double)total_time / 1000000.0;
1656     if (tt < 0.001)
1657         tt = 0.001;
1658     if (total_bytes < 1)
1659         total_bytes = 1;
1660     printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
1661            tok_ident - TOK_IDENT, total_lines, total_bytes,
1662            tt, (int)(total_lines / tt),
1663            total_bytes / tt / 1000000.0);
1664 }
1665
1666 /* set CONFIG_TCCDIR at runtime */
1667 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1668 {
1669     tcc_free(s->tcc_lib_path);
1670     s->tcc_lib_path = tcc_strdup(path);
1671 }
1672
1673 PUB_FUNC void set_num_callers(int n)
1674 {
1675 #ifdef CONFIG_TCC_BACKTRACE
1676     num_callers = n;
1677 #endif
1678 }
1679
1680
1681 LIBTCCAPI const char *tcc_default_target(TCCState *s)
1682 {
1683     /* FIXME will break in multithreaded case */
1684     static char outfile_default[1024];
1685
1686     char *ext;
1687     const char *name =
1688         strcmp(s->input_files[0], "-") == 0 ? "a"
1689                                             : tcc_basename(s->input_files[0]);
1690     pstrcpy(outfile_default, sizeof(outfile_default), name);
1691     ext = tcc_fileextension(outfile_default);
1692 #ifdef TCC_TARGET_PE
1693     if (s->output_type == TCC_OUTPUT_DLL)
1694         strcpy(ext, ".dll");
1695     else
1696     if (s->output_type == TCC_OUTPUT_EXE)
1697         strcpy(ext, ".exe");
1698     else
1699 #endif
1700     if (( (s->output_type == TCC_OUTPUT_OBJ && !s->reloc_output) ||
1701           (s->output_type == TCC_OUTPUT_PREPROCESS) )
1702         && *ext)
1703         strcpy(ext, ".o");
1704     else
1705         pstrcpy(outfile_default, sizeof(outfile_default), "a.out");
1706
1707     return outfile_default;
1708 }
1709
1710
1711 LIBTCCAPI void tcc_gen_makedeps(TCCState *s, const char *target, const char *filename)
1712 {
1713     FILE *depout;
1714     char buf[1024], *ext;
1715     int i;
1716
1717     if (!target)
1718         target = tcc_default_target(s);
1719
1720     if (!filename) {
1721         /* compute filename automatically
1722          * dir/file.o -> dir/file.d             */
1723         pstrcpy(buf, sizeof(buf), target);
1724         ext = tcc_fileextension(buf);
1725         pstrcpy(ext, sizeof(buf) - (ext-buf), ".d");
1726         filename = buf;
1727     }
1728
1729     if (s->verbose)
1730         printf("<- %s\n", filename);
1731
1732     /* XXX return err codes instead of error() ? */
1733     depout = fopen(filename, "w");
1734     if (!depout)
1735         error("could not open '%s'", filename);
1736
1737     fprintf(depout, "%s : \\\n", target);
1738     for (i=0; i<s->nb_target_deps; ++i)
1739         fprintf(depout, "\t%s \\\n", s->target_deps[i]);
1740     fprintf(depout, "\n");
1741     fclose(depout);
1742 }