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