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 #ifndef NOTALLINONE
  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 /* we use our own 'finite' function to avoid potential problems with
 296    non standard math libs */
 297 /* XXX: endianness dependent */
 298 ST_FUNC int ieee_finite(double d)
 299 {
 300     int *p = (int *)&d;
 301     return ((unsigned)((p[1] | 0x800fffff) + 1)) >> 31;
 302 }
 303
 304 /********************************************************/
 305
 306 ST_FUNC Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags)
 307 {
 308     Section *sec;
 309
 310     sec = tcc_mallocz(sizeof(Section) + strlen(name));
 311     strcpy(sec->name, name);
 312     sec->sh_type = sh_type;
 313     sec->sh_flags = sh_flags;
 314     switch(sh_type) {
 315     case SHT_HASH:
 316     case SHT_REL:
 317     case SHT_RELA:
 318     case SHT_DYNSYM:
 319     case SHT_SYMTAB:
 320     case SHT_DYNAMIC:
 321         sec->sh_addralign = 4;
 322         break;
 323     case SHT_STRTAB:
 324         sec->sh_addralign = 1;
 325         break;
 326     default:
 327         sec->sh_addralign = 32; /* default conservative alignment */
 328         break;
 329     }
 330
 331     if (sh_flags & SHF_PRIVATE) {
 332         dynarray_add((void ***)&s1->priv_sections, &s1->nb_priv_sections, sec);
 333     } else {
 334         sec->sh_num = s1->nb_sections;
 335         dynarray_add((void ***)&s1->sections, &s1->nb_sections, sec);
 336     }
 337
 338     return sec;
 339 }
 340
 341 static void free_section(Section *s)
 342 {
 343     tcc_free(s->data);
 344 }
 345
 346 /* realloc section and set its content to zero */
 347 ST_FUNC void section_realloc(Section *sec, unsigned long new_size)
 348 {
 349     unsigned long size;
 350     unsigned char *data;
 351
 352     size = sec->data_allocated;
 353     if (size == 0)
 354         size = 1;
 355     while (size < new_size)
 356         size = size * 2;
 357     data = tcc_realloc(sec->data, size);
 358     if (!data)
 359         error("memory full");
 360     memset(data + sec->data_allocated, 0, size - sec->data_allocated);
 361     sec->data = data;
 362     sec->data_allocated = size;
 363 }
 364
 365 /* reserve at least 'size' bytes in section 'sec' from
 366    sec->data_offset. */
 367 ST_FUNC void *section_ptr_add(Section *sec, unsigned long size)
 368 {
 369     unsigned long offset, offset1;
 370
 371     offset = sec->data_offset;
 372     offset1 = offset + size;
 373     if (offset1 > sec->data_allocated)
 374         section_realloc(sec, offset1);
 375     sec->data_offset = offset1;
 376     return sec->data + offset;
 377 }
 378
 379 /* reserve at least 'size' bytes from section start */
 380 ST_FUNC void section_reserve(Section *sec, unsigned long size)
 381 {
 382     if (size > sec->data_allocated)
 383         section_realloc(sec, size);
 384     if (size > sec->data_offset)
 385         sec->data_offset = size;
 386 }
 387
 388 /* return a reference to a section, and create it if it does not
 389    exists */
 390 ST_FUNC Section *find_section(TCCState *s1, const char *name)
 391 {
 392     Section *sec;
 393     int i;
 394     for(i = 1; i < s1->nb_sections; i++) {
 395         sec = s1->sections[i];
 396         if (!strcmp(name, sec->name))
 397             return sec;
 398     }
 399     /* sections are created as PROGBITS */
 400     return new_section(s1, name, SHT_PROGBITS, SHF_ALLOC);
 401 }
 402
 403 /* update sym->c so that it points to an external symbol in section
 404    'section' with value 'value' */
 405 ST_FUNC void put_extern_sym2(Sym *sym, Section *section,
 406                             unsigned long value, unsigned long size,
 407                             int can_add_underscore)
 408 {
 409     int sym_type, sym_bind, sh_num, info, other;
 410     ElfW(Sym) *esym;
 411     const char *name;
 412     char buf1[256];
 413
 414     if (section == NULL)
 415         sh_num = SHN_UNDEF;
 416     else if (section == SECTION_ABS)
 417         sh_num = SHN_ABS;
 418     else
 419         sh_num = section->sh_num;
 420
 421     if ((sym->type.t & VT_BTYPE) == VT_FUNC) {
 422         sym_type = STT_FUNC;
 423     } else if ((sym->type.t & VT_BTYPE) == VT_VOID) {
 424         sym_type = STT_NOTYPE;
 425     } else {
 426         sym_type = STT_OBJECT;
 427     }
 428
 429     if (sym->type.t & VT_STATIC)
 430         sym_bind = STB_LOCAL;
 431     else {
 432         if (sym_type == STT_FUNC && sym->type.ref && FUNC_WEAK(sym->type.ref->r))
 433             sym_bind = STB_WEAK;
 434         else
 435             sym_bind = STB_GLOBAL;
 436     }
 437
 438     if (!sym->c) {
 439         name = get_tok_str(sym->v, NULL);
 440 #ifdef CONFIG_TCC_BCHECK
 441         if (tcc_state->do_bounds_check) {
 442             char buf[32];
 443
 444             /* XXX: avoid doing that for statics ? */
 445             /* if bound checking is activated, we change some function
 446                names by adding the "__bound" prefix */
 447             switch(sym->v) {
 448 #ifdef TCC_TARGET_PE
 449             /* XXX: we rely only on malloc hooks */
 450             case TOK_malloc:
 451             case TOK_free:
 452             case TOK_realloc:
 453             case TOK_memalign:
 454             case TOK_calloc:
 455 #endif
 456             case TOK_memcpy:
 457             case TOK_memmove:
 458             case TOK_memset:
 459             case TOK_strlen:
 460             case TOK_strcpy:
 461             case TOK_alloca:
 462                 strcpy(buf, "__bound_");
 463                 strcat(buf, name);
 464                 name = buf;
 465                 break;
 466             }
 467         }
 468 #endif
 469         other = 0;
 470
 471 #ifdef TCC_TARGET_PE
 472         if (sym->type.t & VT_EXPORT)
 473             other |= 1;
 474         if (sym_type == STT_FUNC && sym->type.ref) {
 475             int attr = sym->type.ref->r;
 476             if (FUNC_EXPORT(attr))
 477                 other |= 1;
 478             if (FUNC_CALL(attr) == FUNC_STDCALL && can_add_underscore) {
 479                 sprintf(buf1, "_%s@%d", name, FUNC_ARGS(attr) * PTR_SIZE);
 480                 name = buf1;
 481                 other |= 2;
 482                 can_add_underscore = 0;
 483             }
 484         } else {
 485             if (find_elf_sym(tcc_state->dynsymtab_section, name))
 486                 other |= 4;
 487             if (sym->type.t & VT_IMPORT)
 488                 other |= 4;
 489         }
 490 #endif
 491         if (tcc_state->leading_underscore && can_add_underscore) {
 492             buf1[0] = '_';
 493             pstrcpy(buf1 + 1, sizeof(buf1) - 1, name);
 494             name = buf1;
 495         }
 496         info = ELFW(ST_INFO)(sym_bind, sym_type);
 497         sym->c = add_elf_sym(symtab_section, value, size, info, other, sh_num, name);
 498     } else {
 499         esym = &((ElfW(Sym) *)symtab_section->data)[sym->c];
 500         esym->st_value = value;
 501         esym->st_size = size;
 502         esym->st_shndx = sh_num;
 503     }
 504 }
 505
 506 ST_FUNC void put_extern_sym(Sym *sym, Section *section,
 507                            unsigned long value, unsigned long size)
 508 {
 509     put_extern_sym2(sym, section, value, size, 1);
 510 }
 511
 512 /* add a new relocation entry to symbol 'sym' in section 's' */
 513 ST_FUNC void greloc(Section *s, Sym *sym, unsigned long offset, int type)
 514 {
 515     int c = 0;
 516     if (sym) {
 517         if (0 == sym->c)
 518             put_extern_sym(sym, NULL, 0, 0);
 519         c = sym->c;
 520     }
 521     /* now we can add ELF relocation info */
 522     put_elf_reloc(symtab_section, s, offset, type, c);
 523 }
 524
 525 /********************************************************/
 526
 527 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 528 {
 529     int len;
 530     len = strlen(buf);
 531     vsnprintf(buf + len, buf_size - len, fmt, ap);
 532 }
 533
 534 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 535 {
 536     va_list ap;
 537     va_start(ap, fmt);
 538     strcat_vprintf(buf, buf_size, fmt, ap);
 539     va_end(ap);
 540 }
 541
 542 static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 543 {
 544     char buf[2048];
 545     BufferedFile **f;
 546
 547     buf[0] = '\0';
 548     if (file) {
 549         for(f = s1->include_stack; f < s1->include_stack_ptr; f++)
 550             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 551                           (*f)->filename, (*f)->line_num);
 552         if (file->line_num > 0) {
 553             strcat_printf(buf, sizeof(buf),
 554                           "%s:%d: ", file->filename, file->line_num);
 555         } else {
 556             strcat_printf(buf, sizeof(buf),
 557                           "%s: ", file->filename);
 558         }
 559     } else {
 560         strcat_printf(buf, sizeof(buf),
 561                       "tcc: ");
 562     }
 563     if (is_warning)
 564         strcat_printf(buf, sizeof(buf), "warning: ");
 565     else
 566         strcat_printf(buf, sizeof(buf), "error: ");
 567     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 568
 569     if (!s1->error_func) {
 570         /* default case: stderr */
 571         fprintf(stderr, "%s\n", buf);
 572     } else {
 573         s1->error_func(s1->error_opaque, buf);
 574     }
 575     if (!is_warning || s1->warn_error)
 576         s1->nb_errors++;
 577 }
 578
 579 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque,
 580                         void (*error_func)(void *opaque, const char *msg))
 581 {
 582     s->error_opaque = error_opaque;
 583     s->error_func = error_func;
 584 }
 585
 586 /* error without aborting current compilation */
 587 PUB_FUNC void error_noabort(const char *fmt, ...)
 588 {
 589     TCCState *s1 = tcc_state;
 590     va_list ap;
 591
 592     va_start(ap, fmt);
 593     error1(s1, 0, fmt, ap);
 594     va_end(ap);
 595 }
 596
 597 PUB_FUNC void error(const char *fmt, ...)
 598 {
 599     TCCState *s1 = tcc_state;
 600     va_list ap;
 601
 602     va_start(ap, fmt);
 603     error1(s1, 0, fmt, ap);
 604     va_end(ap);
 605     /* better than nothing: in some cases, we accept to handle errors */
 606     if (s1->error_set_jmp_enabled) {
 607         longjmp(s1->error_jmp_buf, 1);
 608     } else {
 609         /* XXX: eliminate this someday */
 610         exit(1);
 611     }
 612 }
 613
 614 PUB_FUNC void expect(const char *msg)
 615 {
 616     error("%s expected", msg);
 617 }
 618
 619 PUB_FUNC void warning(const char *fmt, ...)
 620 {
 621     TCCState *s1 = tcc_state;
 622     va_list ap;
 623
 624     if (s1->warn_none)
 625         return;
 626
 627     va_start(ap, fmt);
 628     error1(s1, 1, fmt, ap);
 629     va_end(ap);
 630 }
 631
 632 /********************************************************/
 633 /* I/O layer */
 634
 635 ST_FUNC BufferedFile *tcc_open(TCCState *s1, const char *filename)
 636 {
 637     int fd;
 638     BufferedFile *bf;
 639
 640     if (strcmp(filename, "-") == 0)
 641         fd = 0, filename = "stdin";
 642     else
 643         fd = open(filename, O_RDONLY | O_BINARY);
 644     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 645         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 646                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 647     if (fd < 0)
 648         return NULL;
 649     bf = tcc_malloc(sizeof(BufferedFile));
 650     bf->fd = fd;
 651     bf->buf_ptr = bf->buffer;
 652     bf->buf_end = bf->buffer;
 653     bf->buffer[0] = CH_EOB; /* put eob symbol */
 654     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 655 #ifdef _WIN32
 656     normalize_slashes(bf->filename);
 657 #endif
 658     bf->line_num = 1;
 659     bf->ifndef_macro = 0;
 660     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 661     //    printf("opening '%s'\n", filename);
 662     return bf;
 663 }
 664
 665 ST_FUNC void tcc_close(BufferedFile *bf)
 666 {
 667     total_lines += bf->line_num;
 668     close(bf->fd);
 669     tcc_free(bf);
 670 }
 671
 672 /* compile the C file opened in 'file'. Return non zero if errors. */
 673 static int tcc_compile(TCCState *s1)
 674 {
 675     Sym *define_start;
 676     char buf[512];
 677     volatile int section_sym;
 678
 679 #ifdef INC_DEBUG
 680     printf("%s: **** new file\n", file->filename);
 681 #endif
 682     preprocess_init(s1);
 683
 684     cur_text_section = NULL;
 685     funcname = "";
 686     anon_sym = SYM_FIRST_ANOM;
 687
 688     /* file info: full path + filename */
 689     section_sym = 0; /* avoid warning */
 690     if (s1->do_debug) {
 691         section_sym = put_elf_sym(symtab_section, 0, 0,
 692                                   ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
 693                                   text_section->sh_num, NULL);
 694         getcwd(buf, sizeof(buf));
 695 #ifdef _WIN32
 696         normalize_slashes(buf);
 697 #endif
 698         pstrcat(buf, sizeof(buf), "/");
 699         put_stabs_r(buf, N_SO, 0, 0,
 700                     text_section->data_offset, text_section, section_sym);
 701         put_stabs_r(file->filename, N_SO, 0, 0,
 702                     text_section->data_offset, text_section, section_sym);
 703     }
 704     /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
 705        symbols can be safely used */
 706     put_elf_sym(symtab_section, 0, 0,
 707                 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
 708                 SHN_ABS, file->filename);
 709
 710     /* define some often used types */
 711     int_type.t = VT_INT;
 712
 713     char_pointer_type.t = VT_BYTE;
 714     mk_pointer(&char_pointer_type);
 715
 716     func_old_type.t = VT_FUNC;
 717     func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
 718
 719 #if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP)
 720     float_type.t = VT_FLOAT;
 721     double_type.t = VT_DOUBLE;
 722
 723     func_float_type.t = VT_FUNC;
 724     func_float_type.ref = sym_push(SYM_FIELD, &float_type, FUNC_CDECL, FUNC_OLD);
 725     func_double_type.t = VT_FUNC;
 726     func_double_type.ref = sym_push(SYM_FIELD, &double_type, FUNC_CDECL, FUNC_OLD);
 727 #endif
 728
 729 #if 0
 730     /* define 'void *alloca(unsigned int)' builtin function */
 731     {
 732         Sym *s1;
 733
 734         p = anon_sym++;
 735         sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
 736         s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
 737         s1->next = NULL;
 738         sym->next = s1;
 739         sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
 740     }
 741 #endif
 742
 743     define_start = define_stack;
 744     nocode_wanted = 1;
 745
 746     if (setjmp(s1->error_jmp_buf) == 0) {
 747         s1->nb_errors = 0;
 748         s1->error_set_jmp_enabled = 1;
 749
 750         ch = file->buf_ptr[0];
 751         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 752         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
 753         next();
 754         decl(VT_CONST);
 755         if (tok != TOK_EOF)
 756             expect("declaration");
 757
 758         /* end of translation unit info */
 759         if (s1->do_debug) {
 760             put_stabs_r(NULL, N_SO, 0, 0,
 761                         text_section->data_offset, text_section, section_sym);
 762         }
 763     }
 764     s1->error_set_jmp_enabled = 0;
 765
 766     /* reset define stack, but leave -Dsymbols (may be incorrect if
 767        they are undefined) */
 768     free_defines(define_start);
 769
 770     gen_inline_functions();
 771
 772     sym_pop(&global_stack, NULL);
 773     sym_pop(&local_stack, NULL);
 774
 775     return s1->nb_errors != 0 ? -1 : 0;
 776 }
 777
 778 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 779 {
 780     BufferedFile bf1, *bf = &bf1;
 781     int ret, len;
 782     char *buf;
 783
 784     /* init file structure */
 785     bf->fd = -1;
 786     /* XXX: avoid copying */
 787     len = strlen(str);
 788     buf = tcc_malloc(len + 1);
 789     if (!buf)
 790         return -1;
 791     memcpy(buf, str, len);
 792     buf[len] = CH_EOB;
 793     bf->buf_ptr = buf;
 794     bf->buf_end = buf + len;
 795     pstrcpy(bf->filename, sizeof(bf->filename), "<string>");
 796     bf->line_num = 1;
 797     file = bf;
 798     ret = tcc_compile(s);
 799     file = NULL;
 800     tcc_free(buf);
 801
 802     /* currently, no need to close */
 803     return ret;
 804 }
 805
 806 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
 807 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 808 {
 809     BufferedFile bf1, *bf = &bf1;
 810
 811     pstrcpy(bf->buffer, IO_BUF_SIZE, sym);
 812     pstrcat(bf->buffer, IO_BUF_SIZE, " ");
 813     /* default value */
 814     if (!value)
 815         value = "1";
 816     pstrcat(bf->buffer, IO_BUF_SIZE, value);
 817
 818     /* init file structure */
 819     bf->fd = -1;
 820     bf->buf_ptr = bf->buffer;
 821     bf->buf_end = bf->buffer + strlen(bf->buffer);
 822     *bf->buf_end = CH_EOB;
 823     bf->filename[0] = '\0';
 824     bf->line_num = 1;
 825     file = bf;
 826
 827     s1->include_stack_ptr = s1->include_stack;
 828
 829     /* parse with define parser */
 830     ch = file->buf_ptr[0];
 831     next_nomacro();
 832     parse_define();
 833     file = NULL;
 834 }
 835
 836 /* undefine a preprocessor symbol */
 837 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 838 {
 839     TokenSym *ts;
 840     Sym *s;
 841     ts = tok_alloc(sym, strlen(sym));
 842     s = define_find(ts->tok);
 843     /* undefine symbol by putting an invalid name */
 844     if (s)
 845         define_undef(s);
 846 }
 847
 848 static void tcc_cleanup(void)
 849 {
 850     int i, n;
 851
 852     if (NULL == tcc_state)
 853         return;
 854     tcc_state = NULL;
 855
 856     /* free -D defines */
 857     free_defines(NULL);
 858
 859     /* free tokens */
 860     n = tok_ident - TOK_IDENT;
 861     for(i = 0; i < n; i++)
 862         tcc_free(table_ident[i]);
 863     tcc_free(table_ident);
 864
 865     /* free sym_pools */
 866     dynarray_reset(&sym_pools, &nb_sym_pools);
 867     /* string buffer */
 868     cstr_free(&tokcstr);
 869     /* reset symbol stack */
 870     sym_free_first = NULL;
 871     /* cleanup from error/setjmp */
 872     macro_ptr = NULL;
 873 }
 874
 875 LIBTCCAPI TCCState *tcc_new(void)
 876 {
 877     TCCState *s;
 878     char buffer[100];
 879     int a,b,c;
 880
 881     tcc_cleanup();
 882
 883     s = tcc_mallocz(sizeof(TCCState));
 884     if (!s)
 885         return NULL;
 886     tcc_state = s;
 887 #ifdef _WIN32
 888     tcc_set_lib_path_w32(s);
 889 #else
 890     tcc_set_lib_path(s, CONFIG_TCCDIR);
 891 #endif
 892     s->output_type = TCC_OUTPUT_MEMORY;
 893     preprocess_new();
 894
 895     /* we add dummy defines for some special macros to speed up tests
 896        and to have working defined() */
 897     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
 898     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
 899     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
 900     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
 901
 902     /* standard defines */
 903     tcc_define_symbol(s, "__STDC__", NULL);
 904     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 905 #if defined(TCC_TARGET_I386)
 906     tcc_define_symbol(s, "__i386__", NULL);
 907     tcc_define_symbol(s, "__i386", NULL);
 908     tcc_define_symbol(s, "i386", NULL);
 909 #endif
 910 #if defined(TCC_TARGET_X86_64)
 911     tcc_define_symbol(s, "__x86_64__", NULL);
 912 #endif
 913 #if defined(TCC_TARGET_ARM)
 914     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 915     tcc_define_symbol(s, "__arm_elf__", NULL);
 916     tcc_define_symbol(s, "__arm_elf", NULL);
 917     tcc_define_symbol(s, "arm_elf", NULL);
 918     tcc_define_symbol(s, "__arm__", NULL);
 919     tcc_define_symbol(s, "__arm", NULL);
 920     tcc_define_symbol(s, "arm", NULL);
 921     tcc_define_symbol(s, "__APCS_32__", NULL);
 922 #endif
 923 #ifdef TCC_TARGET_PE
 924     tcc_define_symbol(s, "_WIN32", NULL);
 925 #ifdef TCC_TARGET_X86_64
 926     tcc_define_symbol(s, "_WIN64", NULL);
 927 #endif
 928 #else
 929     tcc_define_symbol(s, "__unix__", NULL);
 930     tcc_define_symbol(s, "__unix", NULL);
 931     tcc_define_symbol(s, "unix", NULL);
 932 #if defined(__FreeBSD__)
 933 #define str(s) #s
 934     tcc_define_symbol(s, "__FreeBSD__", str( __FreeBSD__));
 935 #undef str
 936 #endif
 937 #if defined(__linux)
 938     tcc_define_symbol(s, "__linux__", NULL);
 939     tcc_define_symbol(s, "__linux", NULL);
 940 #endif
 941 #endif
 942     /* tiny C specific defines */
 943     sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
 944     sprintf(buffer, "%d", a*10000 + b*100 + c);
 945     tcc_define_symbol(s, "__TINYC__", buffer);
 946
 947     /* tiny C & gcc defines */
 948 #if defined TCC_TARGET_PE && defined TCC_TARGET_X86_64
 949     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
 950     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
 951 #else
 952     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 953     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 954 #endif
 955
 956 #ifdef TCC_TARGET_PE
 957     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
 958 #else
 959     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
 960 #endif
 961
 962 #ifndef TCC_TARGET_PE
 963     /* default library paths */
 964 # if defined(TCC_TARGET_X86_64_CENTOS)
 965     tcc_add_library_path(s, CONFIG_SYSROOT "/usr/lib64");
 966     tcc_add_library_path(s, CONFIG_SYSROOT "/lib64");
 967     tcc_add_library_path(s, CONFIG_SYSROOT "/usr/local/lib64");
 968 # else
 969     tcc_add_library_path(s, CONFIG_SYSROOT "/usr/lib");
 970     tcc_add_library_path(s, CONFIG_SYSROOT "/lib");
 971     tcc_add_library_path(s, CONFIG_SYSROOT "/usr/local/lib");
 972 # endif
 973 #endif
 974
 975     /* no section zero */
 976     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
 977
 978     /* create standard sections */
 979     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
 980     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
 981     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
 982
 983     /* symbols are always generated for linking stage */
 984     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
 985                                 ".strtab",
 986                                 ".hashtab", SHF_PRIVATE);
 987     strtab_section = symtab_section->link;
 988
 989     /* private symbol table for dynamic symbols */
 990     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
 991                                       ".dynstrtab",
 992                                       ".dynhashtab", SHF_PRIVATE);
 993     s->alacarte_link = 1;
 994     s->nocommon = 1;
 995
 996 #ifdef CHAR_IS_UNSIGNED
 997     s->char_is_unsigned = 1;
 998 #endif
 999 #if defined(TCC_TARGET_PE) && 0
1000     /* XXX: currently the PE linker is not ready to support that */
1001     s->leading_underscore = 1;
1002 #endif
1003     if (s->section_align == 0)
1004         s->section_align = ELF_PAGE_SIZE;
1005 #ifdef TCC_TARGET_I386
1006     s->seg_size = 32;
1007 #endif
1008     return s;
1009 }
1010
1011 LIBTCCAPI void tcc_delete(TCCState *s1)
1012 {
1013     int i;
1014
1015     tcc_cleanup();
1016
1017     /* free all sections */
1018     for(i = 1; i < s1->nb_sections; i++)
1019         free_section(s1->sections[i]);
1020     dynarray_reset(&s1->sections, &s1->nb_sections);
1021
1022     for(i = 0; i < s1->nb_priv_sections; i++)
1023         free_section(s1->priv_sections[i]);
1024     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1025
1026     /* free any loaded DLLs */
1027     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1028         DLLReference *ref = s1->loaded_dlls[i];
1029         if ( ref->handle )
1030             dlclose(ref->handle);
1031     }
1032
1033     /* free loaded dlls array */
1034     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1035
1036     /* free library paths */
1037     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1038
1039     /* free include paths */
1040     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1041     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1042     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1043
1044     tcc_free(s1->tcc_lib_path);
1045
1046     dynarray_reset(&s1->input_files, &s1->nb_input_files);
1047     dynarray_reset(&s1->input_libs, &s1->nb_input_libs);
1048     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
1049
1050 #ifdef HAVE_SELINUX
1051     munmap (s1->write_mem, s1->mem_size);
1052     munmap (s1->runtime_mem, s1->mem_size);
1053 #else
1054     tcc_free(s1->runtime_mem);
1055 #endif
1056     tcc_free(s1);
1057 }
1058
1059 LIBTCCAPI int tcc_add_include_path(TCCState *s1, const char *pathname)
1060 {
1061     char *pathname1;
1062
1063     pathname1 = tcc_strdup(pathname);
1064     dynarray_add((void ***)&s1->include_paths, &s1->nb_include_paths, pathname1);
1065     return 0;
1066 }
1067
1068 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s1, const char *pathname)
1069 {
1070     char *pathname1;
1071
1072     pathname1 = tcc_strdup(pathname);
1073     dynarray_add((void ***)&s1->sysinclude_paths, &s1->nb_sysinclude_paths, pathname1);
1074     return 0;
1075 }
1076
1077 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1078 {
1079     const char *ext;
1080     ElfW(Ehdr) ehdr;
1081     int fd, ret, size;
1082     BufferedFile *saved_file;
1083
1084     ret = -1;
1085
1086     /* find source file type with extension */
1087     ext = tcc_fileextension(filename);
1088     if (ext[0])
1089         ext++;
1090
1091     /* open the file */
1092     saved_file = file;
1093     file = tcc_open(s1, filename);
1094     if (!file) {
1095         if (flags & AFF_PRINT_ERROR)
1096             error_noabort("file '%s' not found", filename);
1097         goto the_end;
1098     }
1099
1100     /* update target deps */
1101     dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1102             tcc_strdup(filename));
1103
1104     if (flags & AFF_PREPROCESS) {
1105         ret = tcc_preprocess(s1);
1106         goto the_end;
1107     }
1108
1109     if (!ext[0] || !PATHCMP(ext, "c")) {
1110         /* C file assumed */
1111         ret = tcc_compile(s1);
1112         goto the_end;
1113     }
1114
1115 #ifdef CONFIG_TCC_ASM
1116     if (!strcmp(ext, "S")) {
1117         /* preprocessed assembler */
1118         ret = tcc_assemble(s1, 1);
1119         goto the_end;
1120     }
1121
1122     if (!strcmp(ext, "s")) {
1123         /* non preprocessed assembler */
1124         ret = tcc_assemble(s1, 0);
1125         goto the_end;
1126     }
1127 #endif
1128
1129     fd = file->fd;
1130     /* assume executable format: auto guess file type */
1131     size = read(fd, &ehdr, sizeof(ehdr));
1132     lseek(fd, 0, SEEK_SET);
1133     if (size <= 0) {
1134         error_noabort("could not read header");
1135         goto the_end;
1136     }
1137
1138     if (size == sizeof(ehdr) &&
1139         ehdr.e_ident[0] == ELFMAG0 &&
1140         ehdr.e_ident[1] == ELFMAG1 &&
1141         ehdr.e_ident[2] == ELFMAG2 &&
1142         ehdr.e_ident[3] == ELFMAG3) {
1143
1144         /* do not display line number if error */
1145         file->line_num = 0;
1146         if (ehdr.e_type == ET_REL) {
1147             ret = tcc_load_object_file(s1, fd, 0);
1148             goto the_end;
1149
1150         }
1151 #ifndef TCC_TARGET_PE
1152         if (ehdr.e_type == ET_DYN) {
1153             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1154                 void *h;
1155                 h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1156                 if (h)
1157                     ret = 0;
1158             } else {
1159                 ret = tcc_load_dll(s1, fd, filename,
1160                                    (flags & AFF_REFERENCED_DLL) != 0);
1161             }
1162             goto the_end;
1163         }
1164 #endif
1165         error_noabort("unrecognized ELF file");
1166         goto the_end;
1167     }
1168
1169     if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
1170         file->line_num = 0; /* do not display line number if error */
1171         ret = tcc_load_archive(s1, fd);
1172         goto the_end;
1173     }
1174
1175 #ifdef TCC_TARGET_COFF
1176     if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
1177         ret = tcc_load_coff(s1, fd);
1178         goto the_end;
1179     }
1180 #endif
1181
1182 #ifdef TCC_TARGET_PE
1183     ret = pe_load_file(s1, filename, fd);
1184 #else
1185     /* as GNU ld, consider it is an ld script if not recognized */
1186     ret = tcc_load_ldscript(s1);
1187 #endif
1188     if (ret < 0)
1189         error_noabort("unrecognized file type");
1190
1191 the_end:
1192     if (file)
1193         tcc_close(file);
1194     file = saved_file;
1195     return ret;
1196 }
1197
1198 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1199 {
1200     dynarray_add((void ***)&s->input_files, &s->nb_input_files, tcc_strdup(filename));
1201
1202     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1203         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS);
1204     else
1205         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR);
1206 }
1207
1208 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1209 {
1210     char *pathname1;
1211
1212     pathname1 = tcc_strdup(pathname);
1213     dynarray_add((void ***)&s->library_paths, &s->nb_library_paths, pathname1);
1214     return 0;
1215 }
1216
1217 /* find and load a dll. Return non zero if not found */
1218 /* XXX: add '-rpath' option support ? */
1219 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1220 {
1221     char buf[1024];
1222     int i;
1223
1224     for(i = 0; i < s->nb_library_paths; i++) {
1225         snprintf(buf, sizeof(buf), "%s/%s",
1226                  s->library_paths[i], filename);
1227         if (tcc_add_file_internal(s, buf, flags) == 0)
1228             return 0;
1229     }
1230     return -1;
1231 }
1232
1233 /* the library name is the same as the argument of the '-l' option */
1234 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1235 {
1236     char buf[1024];
1237     int i;
1238
1239     dynarray_add((void ***)&s->input_libs, &s->nb_input_libs, tcc_strdup(libraryname));
1240
1241     /* first we look for the dynamic library if not static linking */
1242     if (!s->static_link) {
1243 #ifdef TCC_TARGET_PE
1244         if (pe_add_dll(s, libraryname) == 0)
1245             return 0;
1246 #else
1247         snprintf(buf, sizeof(buf), "lib%s.so", libraryname);
1248         if (tcc_add_dll(s, buf, 0) == 0)
1249             return 0;
1250 #endif
1251     }
1252     /* then we look for the static library */
1253     for(i = 0; i < s->nb_library_paths; i++) {
1254         snprintf(buf, sizeof(buf), "%s/lib%s.a",
1255                  s->library_paths[i], libraryname);
1256         if (tcc_add_file_internal(s, buf, 0) == 0)
1257             return 0;
1258     }
1259     return -1;
1260 }
1261
1262 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1263 {
1264 #ifdef TCC_TARGET_PE
1265     pe_putimport(s, 0, name, val);
1266 #else
1267     add_elf_sym(symtab_section, (uplong)val, 0,
1268                 ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1269                 SHN_ABS, name);
1270 #endif
1271     return 0;
1272 }
1273
1274 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
1275 {
1276     char buf[1024];
1277
1278     s->output_type = output_type;
1279
1280     if (!s->nostdinc) {
1281         /* default include paths */
1282         /* XXX: reverse order needed if -isystem support */
1283 #ifndef TCC_TARGET_PE
1284         tcc_add_sysinclude_path(s, CONFIG_SYSROOT "/usr/local/include");
1285         tcc_add_sysinclude_path(s, CONFIG_SYSROOT "/usr/include");
1286 #endif
1287         snprintf(buf, sizeof(buf), "%s/include", s->tcc_lib_path);
1288         tcc_add_sysinclude_path(s, buf);
1289 #ifdef TCC_TARGET_PE
1290         snprintf(buf, sizeof(buf), "%s/include/winapi", s->tcc_lib_path);
1291         tcc_add_sysinclude_path(s, buf);
1292 #endif
1293     }
1294
1295     /* if bound checking, then add corresponding sections */
1296 #ifdef CONFIG_TCC_BCHECK
1297     if (s->do_bounds_check) {
1298         /* define symbol */
1299         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1300         /* create bounds sections */
1301         bounds_section = new_section(s, ".bounds",
1302                                      SHT_PROGBITS, SHF_ALLOC);
1303         lbounds_section = new_section(s, ".lbounds",
1304                                       SHT_PROGBITS, SHF_ALLOC);
1305     }
1306 #endif
1307
1308     if (s->char_is_unsigned) {
1309         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
1310     }
1311
1312     /* add debug sections */
1313     if (s->do_debug) {
1314         /* stab symbols */
1315         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
1316         stab_section->sh_entsize = sizeof(Stab_Sym);
1317         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
1318         put_elf_str(stabstr_section, "");
1319         stab_section->link = stabstr_section;
1320         /* put first entry */
1321         put_stabs("", 0, 0, 0, 0);
1322     }
1323
1324     /* add libc crt1/crti objects */
1325 #ifndef TCC_TARGET_PE
1326     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1327         !s->nostdlib) {
1328         if (output_type != TCC_OUTPUT_DLL)
1329             tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crt1.o");
1330         tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crti.o");
1331     }
1332 #endif
1333
1334 #ifdef TCC_TARGET_PE
1335     snprintf(buf, sizeof(buf), "%s/lib", s->tcc_lib_path);
1336     tcc_add_library_path(s, buf);
1337 #ifdef _WIN32
1338     if (GetSystemDirectory(buf, sizeof buf))
1339         tcc_add_library_path(s, buf);
1340 #endif
1341 #endif
1342
1343     return 0;
1344 }
1345
1346 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1347 #define FD_INVERT 0x0002 /* invert value before storing */
1348
1349 typedef struct FlagDef {
1350     uint16_t offset;
1351     uint16_t flags;
1352     const char *name;
1353 } FlagDef;
1354
1355 static const FlagDef warning_defs[] = {
1356     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1357     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1358     { offsetof(TCCState, warn_error), 0, "error" },
1359     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1360       "implicit-function-declaration" },
1361 };
1362
1363 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1364                     const char *name, int value)
1365 {
1366     int i;
1367     const FlagDef *p;
1368     const char *r;
1369
1370     r = name;
1371     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
1372         r += 3;
1373         value = !value;
1374     }
1375     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1376         if (!strcmp(r, p->name))
1377             goto found;
1378     }
1379     return -1;
1380  found:
1381     if (p->flags & FD_INVERT)
1382         value = !value;
1383     *(int *)((uint8_t *)s + p->offset) = value;
1384     return 0;
1385 }
1386
1387 /* set/reset a warning */
1388 LIBTCCAPI int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1389 {
1390     int i;
1391     const FlagDef *p;
1392
1393     if (!strcmp(warning_name, "all")) {
1394         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1395             if (p->flags & WD_ALL)
1396                 *(int *)((uint8_t *)s + p->offset) = 1;
1397         }
1398         return 0;
1399     } else {
1400         return set_flag(s, warning_defs, countof(warning_defs),
1401                         warning_name, value);
1402     }
1403 }
1404
1405 static const FlagDef flag_defs[] = {
1406     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1407     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1408     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1409     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1410 };
1411
1412 /* set/reset a flag */
1413 PUB_FUNC int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1414 {
1415     return set_flag(s, flag_defs, countof(flag_defs),
1416                     flag_name, value);
1417 }
1418
1419
1420 static int strstart(const char *str, const char *val, char **ptr)
1421 {
1422     const char *p, *q;
1423     p = str;
1424     q = val;
1425     while (*q != '\0') {
1426         if (*p != *q)
1427             return 0;
1428         p++;
1429         q++;
1430     }
1431     if (ptr)
1432         *ptr = (char *) p;
1433     return 1;
1434 }
1435
1436 /* set linker options */
1437 PUB_FUNC const char * tcc_set_linker(TCCState *s, char *option, int multi)
1438 {
1439     char *p = option;
1440     char *end;
1441
1442     while (option && *option) {
1443         end = NULL;
1444         if (strstart(option, "-Bsymbolic", &p)) {
1445             s->symbolic = TRUE;
1446 #ifdef TCC_TARGET_PE
1447         } else if (strstart(option, "--file-alignment,", &p)) {
1448             s->pe_file_align = strtoul(p, &end, 16);
1449 #endif
1450         } else if (strstart(option, "-fini,", &p)) {
1451             s->fini_symbol = p;
1452             if (s->warn_unsupported)
1453                 warning("ignoring -fini %s", p);
1454
1455         } else if (strstart(option, "--image-base,", &p)) {
1456             s->text_addr = strtoul(p, &end, 16);
1457             s->has_text_addr = 1;
1458         } else if (strstart(option, "-init,", &p)) {
1459             s->init_symbol = p;
1460             if (s->warn_unsupported)
1461                 warning("ignoring -init %s", p);
1462
1463         } else if (strstart(option, "--oformat,", &p)) {
1464 #if defined(TCC_TARGET_PE)
1465             if (strstart(p, "pe-", NULL)) {
1466 #else
1467 #if defined(TCC_TARGET_X86_64)
1468             if (strstart(p, "elf64-", NULL)) {
1469 #else
1470             if (strstart(p, "elf32-", NULL)) {
1471 #endif
1472 #endif
1473                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1474             } else if (!strcmp(p, "binary")) {
1475                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1476             } else
1477 #ifdef TCC_TARGET_COFF
1478             if (!strcmp(p, "coff")) {
1479                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1480             } else
1481 #endif
1482             {
1483                 return p;
1484             }
1485
1486         } else if (strstart(option, "-rpath=", &p)) {
1487             s->rpath = p;
1488         } else if (strstart(option, "--section-alignment,", &p)) {
1489             s->section_align = strtoul(p, &end, 16);
1490         } else if (strstart(option, "-soname,", &p)) {
1491             s->soname = p;
1492             multi = 0;
1493 #ifdef TCC_TARGET_PE
1494         } else if (strstart(option, "--subsystem,", &p)) {
1495 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1496             if (!strcmp(p, "native")) {
1497                 s->pe_subsystem = 1;
1498             } else if (!strcmp(p, "console")) {
1499                 s->pe_subsystem = 3;
1500             } else if (!strcmp(p, "gui")) {
1501                 s->pe_subsystem = 2;
1502             } else if (!strcmp(p, "posix")) {
1503                 s->pe_subsystem = 7;
1504             } else if (!strcmp(p, "efiapp")) {
1505                 s->pe_subsystem = 10;
1506             } else if (!strcmp(p, "efiboot")) {
1507                 s->pe_subsystem = 11;
1508             } else if (!strcmp(p, "efiruntime")) {
1509                 s->pe_subsystem = 12;
1510             } else if (!strcmp(p, "efirom")) {
1511                 s->pe_subsystem = 13;
1512 #elif defined(TCC_TARGET_ARM)
1513             if (!strcmp(p, "wince")) {
1514                 s->pe_subsystem = 9;
1515 #endif
1516             } else {
1517                 return p;
1518             }
1519 #endif
1520
1521         } else if (strstart(option, "-Ttext,", &p)) {
1522             s->text_addr = strtoul(p, &end, 16);
1523             s->has_text_addr = 1;
1524
1525         } else {
1526             return option;
1527         }
1528
1529         if (multi) {
1530             option = NULL;
1531             p = strchr( (end) ? end : p, ',');
1532             if (p) {
1533                 *p = 0;    /* terminate last option */
1534                 option = ++p;
1535             }
1536         } else
1537             option = NULL;
1538     }
1539     return NULL;
1540 }
1541
1542 PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time)
1543 {
1544     double tt;
1545     tt = (double)total_time / 1000000.0;
1546     if (tt < 0.001)
1547         tt = 0.001;
1548     if (total_bytes < 1)
1549         total_bytes = 1;
1550     printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
1551            tok_ident - TOK_IDENT, total_lines, total_bytes,
1552            tt, (int)(total_lines / tt),
1553            total_bytes / tt / 1000000.0);
1554 }
1555
1556 /* set CONFIG_TCCDIR at runtime */
1557 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1558 {
1559     tcc_free(s->tcc_lib_path);
1560     s->tcc_lib_path = tcc_strdup(path);
1561 }
1562
1563 PUB_FUNC void set_num_callers(int n)
1564 {
1565 #ifdef CONFIG_TCC_BACKTRACE
1566     num_callers = n;
1567 #endif
1568 }
1569
1570
1571 LIBTCCAPI const char *tcc_default_target(TCCState *s)
1572 {
1573     /* FIXME will break in multithreaded case */
1574     static char outfile_default[1024];
1575
1576     char *ext;
1577     const char *name =
1578         strcmp(s->input_files[0], "-") == 0 ? "a"
1579                                             : tcc_basename(s->input_files[0]);
1580     pstrcpy(outfile_default, sizeof(outfile_default), name);
1581     ext = tcc_fileextension(outfile_default);
1582 #ifdef TCC_TARGET_PE
1583     if (s->output_type == TCC_OUTPUT_DLL)
1584         strcpy(ext, ".dll");
1585     else
1586     if (s->output_type == TCC_OUTPUT_EXE)
1587         strcpy(ext, ".exe");
1588     else
1589 #endif
1590     if (( (s->output_type == TCC_OUTPUT_OBJ && !s->reloc_output) ||
1591           (s->output_type == TCC_OUTPUT_PREPROCESS) )
1592         && *ext)
1593         strcpy(ext, ".o");
1594     else
1595         pstrcpy(outfile_default, sizeof(outfile_default), "a.out");
1596
1597     return outfile_default;
1598 }
1599
1600
1601 LIBTCCAPI void tcc_gen_makedeps(TCCState *s, const char *target, const char *filename)
1602 {
1603     FILE *depout;
1604     char buf[1024], *ext;
1605     int i;
1606
1607     if (!target)
1608         target = tcc_default_target(s);
1609
1610     if (!filename) {
1611         /* compute filename automatically
1612          * dir/file.o -> dir/file.d             */
1613         pstrcpy(buf, sizeof(buf), target);
1614         ext = tcc_fileextension(buf);
1615         pstrcpy(ext, sizeof(buf) - (ext-buf), ".d");
1616         filename = buf;
1617     }
1618
1619     if (s->verbose)
1620         printf("<- %s\n", filename);
1621
1622     /* XXX return err codes instead of error() ? */
1623     depout = fopen(filename, "w");
1624     if (!depout)
1625         error("could not open '%s'", filename);
1626
1627     fprintf(depout, "%s : \\\n", target);
1628     for (i=0; i<s->nb_target_deps; ++i)
1629         fprintf(depout, "\t%s \\\n", s->target_deps[i]);
1630     fprintf(depout, "\n");
1631     fclose(depout);
1632 }