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