libtcc.c

   1 /*
   2  *  TCC - Tiny C Compiler
   3  *
   4  *  Copyright (c) 2001-2004 Fabrice Bellard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "tcc.h"
  22
  23 /********************************************************/
  24 /* global variables */
  25
  26 /* use GNU C extensions */
  27 ST_DATA int gnu_ext = 1;
  28
  29 /* use TinyCC extensions */
  30 ST_DATA int tcc_ext = 1;
  31
  32 /* XXX: get rid of this ASAP */
  33 ST_DATA struct TCCState *tcc_state;
  34
  35 /********************************************************/
  36
  37 #ifdef ONE_SOURCE
  38 #include "tccpp.c"
  39 #include "tccgen.c"
  40 #include "tccelf.c"
  41 #include "tccrun.c"
  42 #ifdef TCC_TARGET_I386
  43 #include "i386-gen.c"
  44 #endif
  45 #ifdef TCC_TARGET_ARM
  46 #include "arm-gen.c"
  47 #endif
  48 #ifdef TCC_TARGET_C67
  49 #include "c67-gen.c"
  50 #endif
  51 #ifdef TCC_TARGET_X86_64
  52 #include "x86_64-gen.c"
  53 #endif
  54 #ifdef CONFIG_TCC_ASM
  55 #include "tccasm.c"
  56 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
  57 #include "i386-asm.c"
  58 #endif
  59 #endif
  60 #ifdef TCC_TARGET_COFF
  61 #include "tcccoff.c"
  62 #endif
  63 #ifdef TCC_TARGET_PE
  64 #include "tccpe.c"
  65 #endif
  66 #endif /* ONE_SOURCE */
  67
  68 /********************************************************/
  69 #ifndef CONFIG_TCC_ASM
  70 ST_FUNC void asm_instr(void)
  71 {
  72     tcc_error("inline asm() not supported");
  73 }
  74 ST_FUNC void asm_global_instr(void)
  75 {
  76     tcc_error("inline asm() not supported");
  77 }
  78 #endif
  79
  80 /********************************************************/
  81
  82 #ifdef _WIN32
  83 static char *normalize_slashes(char *path)
  84 {
  85     char *p;
  86     for (p = path; *p; ++p)
  87         if (*p == '\\')
  88             *p = '/';
  89     return path;
  90 }
  91
  92 static HMODULE tcc_module;
  93
  94 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
  95 static void tcc_set_lib_path_w32(TCCState *s)
  96 {
  97     char path[1024], *p;
  98     GetModuleFileNameA(tcc_module, path, sizeof path);
  99     p = tcc_basename(normalize_slashes(strlwr(path)));
 100     if (p - 5 > path && 0 == strncmp(p - 5, "/bin/", 5))
 101         p -= 5;
 102     else if (p > path)
 103         p--;
 104     *p = 0;
 105     tcc_set_lib_path(s, path);
 106 }
 107
 108 static void tcc_add_systemdir(TCCState *s)
 109 {
 110     char buf[1000];
 111     GetSystemDirectory(buf, sizeof buf);
 112     tcc_add_library_path(s, normalize_slashes(buf));
 113 }
 114
 115 #ifndef CONFIG_TCC_STATIC
 116 void dlclose(void *p)
 117 {
 118     FreeLibrary((HMODULE)p);
 119 }
 120 #endif
 121
 122 #ifdef LIBTCC_AS_DLL
 123 BOOL WINAPI DllMain (HANDLE hDll, DWORD dwReason, LPVOID lpReserved)
 124 {
 125     if (DLL_PROCESS_ATTACH == dwReason)
 126         tcc_module = hDll;
 127     return TRUE;
 128 }
 129 #endif
 130 #endif
 131
 132 /********************************************************/
 133 /* copy a string and truncate it. */
 134 PUB_FUNC char *pstrcpy(char *buf, int buf_size, const char *s)
 135 {
 136     char *q, *q_end;
 137     int c;
 138
 139     if (buf_size > 0) {
 140         q = buf;
 141         q_end = buf + buf_size - 1;
 142         while (q < q_end) {
 143             c = *s++;
 144             if (c == '\0')
 145                 break;
 146             *q++ = c;
 147         }
 148         *q = '\0';
 149     }
 150     return buf;
 151 }
 152
 153 /* strcat and truncate. */
 154 PUB_FUNC char *pstrcat(char *buf, int buf_size, const char *s)
 155 {
 156     int len;
 157     len = strlen(buf);
 158     if (len < buf_size)
 159         pstrcpy(buf + len, buf_size - len, s);
 160     return buf;
 161 }
 162
 163 PUB_FUNC char *pstrncpy(char *out, const char *in, size_t num)
 164 {
 165     memcpy(out, in, num);
 166     out[num] = '\0';
 167     return out;
 168 }
 169
 170 /* extract the basename of a file */
 171 PUB_FUNC char *tcc_basename(const char *name)
 172 {
 173     char *p = strchr(name, 0);
 174     while (p > name && !IS_DIRSEP(p[-1]))
 175         --p;
 176     return p;
 177 }
 178
 179 /* extract extension part of a file
 180  *
 181  * (if no extension, return pointer to end-of-string)
 182  */
 183 PUB_FUNC char *tcc_fileextension (const char *name)
 184 {
 185     char *b = tcc_basename(name);
 186     char *e = strrchr(b, '.');
 187     return e ? e : strchr(b, 0);
 188 }
 189
 190 /********************************************************/
 191 /* memory management */
 192
 193 #undef free
 194 #undef malloc
 195 #undef realloc
 196
 197 #ifdef MEM_DEBUG
 198 int mem_cur_size;
 199 int mem_max_size;
 200 unsigned malloc_usable_size(void*);
 201 #endif
 202
 203 PUB_FUNC void tcc_free(void *ptr)
 204 {
 205 #ifdef MEM_DEBUG
 206     mem_cur_size -= malloc_usable_size(ptr);
 207 #endif
 208     free(ptr);
 209 }
 210
 211 PUB_FUNC void *tcc_malloc(unsigned long size)
 212 {
 213     void *ptr;
 214     ptr = malloc(size);
 215     if (!ptr && size)
 216         tcc_error("memory full");
 217 #ifdef MEM_DEBUG
 218     mem_cur_size += malloc_usable_size(ptr);
 219     if (mem_cur_size > mem_max_size)
 220         mem_max_size = mem_cur_size;
 221 #endif
 222     return ptr;
 223 }
 224
 225 PUB_FUNC void *tcc_mallocz(unsigned long size)
 226 {
 227     void *ptr;
 228     ptr = tcc_malloc(size);
 229     memset(ptr, 0, size);
 230     return ptr;
 231 }
 232
 233 PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
 234 {
 235     void *ptr1;
 236 #ifdef MEM_DEBUG
 237     mem_cur_size -= malloc_usable_size(ptr);
 238 #endif
 239     ptr1 = realloc(ptr, size);
 240     if (!ptr1 && size)
 241         tcc_error("memory full");
 242 #ifdef MEM_DEBUG
 243     /* NOTE: count not correct if alloc error, but not critical */
 244     mem_cur_size += malloc_usable_size(ptr1);
 245     if (mem_cur_size > mem_max_size)
 246         mem_max_size = mem_cur_size;
 247 #endif
 248     return ptr1;
 249 }
 250
 251 PUB_FUNC char *tcc_strdup(const char *str)
 252 {
 253     char *ptr;
 254     ptr = tcc_malloc(strlen(str) + 1);
 255     strcpy(ptr, str);
 256     return ptr;
 257 }
 258
 259 PUB_FUNC void tcc_memstats(void)
 260 {
 261 #ifdef MEM_DEBUG
 262     printf("memory in use: %d\n", mem_cur_size);
 263 #endif
 264 }
 265
 266 #define free(p) use_tcc_free(p)
 267 #define malloc(s) use_tcc_malloc(s)
 268 #define realloc(p, s) use_tcc_realloc(p, s)
 269
 270 /********************************************************/
 271 /* dynarrays */
 272
 273 PUB_FUNC void dynarray_add(void ***ptab, int *nb_ptr, void *data)
 274 {
 275     int nb, nb_alloc;
 276     void **pp;
 277
 278     nb = *nb_ptr;
 279     pp = *ptab;
 280     /* every power of two we double array size */
 281     if ((nb & (nb - 1)) == 0) {
 282         if (!nb)
 283             nb_alloc = 1;
 284         else
 285             nb_alloc = nb * 2;
 286         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 287         *ptab = pp;
 288     }
 289     pp[nb++] = data;
 290     *nb_ptr = nb;
 291 }
 292
 293 PUB_FUNC void dynarray_reset(void *pp, int *n)
 294 {
 295     void **p;
 296     for (p = *(void***)pp; *n; ++p, --*n)
 297         if (*p)
 298             tcc_free(*p);
 299     tcc_free(*(void**)pp);
 300     *(void**)pp = NULL;
 301 }
 302
 303 static void tcc_split_path(TCCState *s, void ***p_ary, int *p_nb_ary, const char *in)
 304 {
 305     const char *p;
 306     do {
 307         int c;
 308         CString str;
 309
 310         cstr_new(&str);
 311         for (p = in; c = *p, c != '\0' && c != PATHSEP; ++p) {
 312             if (c == '{' && p[1] && p[2] == '}') {
 313                 c = p[1], p += 2;
 314                 if (c == 'B')
 315                     cstr_cat(&str, s->tcc_lib_path);
 316             } else {
 317                 cstr_ccat(&str, c);
 318             }
 319         }
 320         cstr_ccat(&str, '\0');
 321         dynarray_add(p_ary, p_nb_ary, str.data);
 322         in = p+1;
 323     } while (*p);
 324 }
 325
 326 /********************************************************/
 327
 328 ST_FUNC Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags)
 329 {
 330     Section *sec;
 331
 332     sec = tcc_mallocz(sizeof(Section) + strlen(name));
 333     strcpy(sec->name, name);
 334     sec->sh_type = sh_type;
 335     sec->sh_flags = sh_flags;
 336     switch(sh_type) {
 337     case SHT_HASH:
 338     case SHT_REL:
 339     case SHT_RELA:
 340     case SHT_DYNSYM:
 341     case SHT_SYMTAB:
 342     case SHT_DYNAMIC:
 343         sec->sh_addralign = 4;
 344         break;
 345     case SHT_STRTAB:
 346         sec->sh_addralign = 1;
 347         break;
 348     default:
 349         sec->sh_addralign = 32; /* default conservative alignment */
 350         break;
 351     }
 352
 353     if (sh_flags & SHF_PRIVATE) {
 354         dynarray_add((void ***)&s1->priv_sections, &s1->nb_priv_sections, sec);
 355     } else {
 356         sec->sh_num = s1->nb_sections;
 357         dynarray_add((void ***)&s1->sections, &s1->nb_sections, sec);
 358     }
 359
 360     return sec;
 361 }
 362
 363 static void free_section(Section *s)
 364 {
 365     tcc_free(s->data);
 366 }
 367
 368 /* realloc section and set its content to zero */
 369 ST_FUNC void section_realloc(Section *sec, unsigned long new_size)
 370 {
 371     unsigned long size;
 372     unsigned char *data;
 373
 374     size = sec->data_allocated;
 375     if (size == 0)
 376         size = 1;
 377     while (size < new_size)
 378         size = size * 2;
 379     data = tcc_realloc(sec->data, size);
 380     memset(data + sec->data_allocated, 0, size - sec->data_allocated);
 381     sec->data = data;
 382     sec->data_allocated = size;
 383 }
 384
 385 /* reserve at least 'size' bytes in section 'sec' from
 386    sec->data_offset. */
 387 ST_FUNC void *section_ptr_add(Section *sec, unsigned long size)
 388 {
 389     unsigned long offset, offset1;
 390
 391     offset = sec->data_offset;
 392     offset1 = offset + size;
 393     if (offset1 > sec->data_allocated)
 394         section_realloc(sec, offset1);
 395     sec->data_offset = offset1;
 396     return sec->data + offset;
 397 }
 398
 399 /* reserve at least 'size' bytes from section start */
 400 ST_FUNC void section_reserve(Section *sec, unsigned long size)
 401 {
 402     if (size > sec->data_allocated)
 403         section_realloc(sec, size);
 404     if (size > sec->data_offset)
 405         sec->data_offset = size;
 406 }
 407
 408 /* return a reference to a section, and create it if it does not
 409    exists */
 410 ST_FUNC Section *find_section(TCCState *s1, const char *name)
 411 {
 412     Section *sec;
 413     int i;
 414     for(i = 1; i < s1->nb_sections; i++) {
 415         sec = s1->sections[i];
 416         if (!strcmp(name, sec->name))
 417             return sec;
 418     }
 419     /* sections are created as PROGBITS */
 420     return new_section(s1, name, SHT_PROGBITS, SHF_ALLOC);
 421 }
 422
 423 /* update sym->c so that it points to an external symbol in section
 424    'section' with value 'value' */
 425 ST_FUNC void put_extern_sym2(Sym *sym, Section *section,
 426                             uplong value, unsigned long size,
 427                             int can_add_underscore)
 428 {
 429     int sym_type, sym_bind, sh_num, info, other;
 430     ElfW(Sym) *esym;
 431     const char *name;
 432     char buf1[256];
 433
 434     if (section == NULL)
 435         sh_num = SHN_UNDEF;
 436     else if (section == SECTION_ABS)
 437         sh_num = SHN_ABS;
 438     else
 439         sh_num = section->sh_num;
 440
 441     if ((sym->type.t & VT_BTYPE) == VT_FUNC) {
 442         sym_type = STT_FUNC;
 443     } else if ((sym->type.t & VT_BTYPE) == VT_VOID) {
 444         sym_type = STT_NOTYPE;
 445     } else {
 446         sym_type = STT_OBJECT;
 447     }
 448
 449     if (sym->type.t & VT_STATIC)
 450         sym_bind = STB_LOCAL;
 451     else {
 452         if (sym->type.t & VT_WEAK)
 453             sym_bind = STB_WEAK;
 454         else
 455             sym_bind = STB_GLOBAL;
 456     }
 457
 458     if (!sym->c) {
 459         name = get_tok_str(sym->v, NULL);
 460 #ifdef CONFIG_TCC_BCHECK
 461         if (tcc_state->do_bounds_check) {
 462             char buf[32];
 463
 464             /* XXX: avoid doing that for statics ? */
 465             /* if bound checking is activated, we change some function
 466                names by adding the "__bound" prefix */
 467             switch(sym->v) {
 468 #ifdef TCC_TARGET_PE
 469             /* XXX: we rely only on malloc hooks */
 470             case TOK_malloc:
 471             case TOK_free:
 472             case TOK_realloc:
 473             case TOK_memalign:
 474             case TOK_calloc:
 475 #endif
 476             case TOK_memcpy:
 477             case TOK_memmove:
 478             case TOK_memset:
 479             case TOK_strlen:
 480             case TOK_strcpy:
 481             case TOK_alloca:
 482                 strcpy(buf, "__bound_");
 483                 strcat(buf, name);
 484                 name = buf;
 485                 break;
 486             }
 487         }
 488 #endif
 489         other = 0;
 490
 491 #ifdef TCC_TARGET_PE
 492         if (sym->type.t & VT_EXPORT)
 493             other |= 1;
 494         if (sym_type == STT_FUNC && sym->type.ref) {
 495             int attr = sym->type.ref->r;
 496             if (FUNC_EXPORT(attr))
 497                 other |= 1;
 498             if (FUNC_CALL(attr) == FUNC_STDCALL && can_add_underscore) {
 499                 sprintf(buf1, "_%s@%d", name, FUNC_ARGS(attr) * PTR_SIZE);
 500                 name = buf1;
 501                 other |= 2;
 502                 can_add_underscore = 0;
 503             }
 504         } else {
 505             if (find_elf_sym(tcc_state->dynsymtab_section, name))
 506                 other |= 4;
 507             if (sym->type.t & VT_IMPORT)
 508                 other |= 4;
 509         }
 510 #endif
 511         if (tcc_state->leading_underscore && can_add_underscore) {
 512             buf1[0] = '_';
 513             pstrcpy(buf1 + 1, sizeof(buf1) - 1, name);
 514             name = buf1;
 515         }
 516         if (sym->asm_label) {
 517             name = sym->asm_label;
 518         }
 519         info = ELFW(ST_INFO)(sym_bind, sym_type);
 520         sym->c = add_elf_sym(symtab_section, value, size, info, other, sh_num, name);
 521     } else {
 522         esym = &((ElfW(Sym) *)symtab_section->data)[sym->c];
 523         esym->st_value = value;
 524         esym->st_size = size;
 525         esym->st_shndx = sh_num;
 526     }
 527 }
 528
 529 ST_FUNC void put_extern_sym(Sym *sym, Section *section,
 530                            uplong value, unsigned long size)
 531 {
 532     put_extern_sym2(sym, section, value, size, 1);
 533 }
 534
 535 /* add a new relocation entry to symbol 'sym' in section 's' */
 536 ST_FUNC void greloc(Section *s, Sym *sym, unsigned long offset, int type)
 537 {
 538     int c = 0;
 539     if (sym) {
 540         if (0 == sym->c)
 541             put_extern_sym(sym, NULL, 0, 0);
 542         c = sym->c;
 543     }
 544     /* now we can add ELF relocation info */
 545     put_elf_reloc(symtab_section, s, offset, type, c);
 546 }
 547
 548 /********************************************************/
 549
 550 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 551 {
 552     int len;
 553     len = strlen(buf);
 554     vsnprintf(buf + len, buf_size - len, fmt, ap);
 555 }
 556
 557 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 558 {
 559     va_list ap;
 560     va_start(ap, fmt);
 561     strcat_vprintf(buf, buf_size, fmt, ap);
 562     va_end(ap);
 563 }
 564
 565 static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 566 {
 567     char buf[2048];
 568     BufferedFile **f;
 569
 570     buf[0] = '\0';
 571     if (file) {
 572         for(f = s1->include_stack; f < s1->include_stack_ptr; f++)
 573             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 574                           (*f)->filename, (*f)->line_num);
 575         if (file->line_num > 0) {
 576             strcat_printf(buf, sizeof(buf),
 577                           "%s:%d: ", file->filename, file->line_num);
 578         } else {
 579             strcat_printf(buf, sizeof(buf),
 580                           "%s: ", file->filename);
 581         }
 582     } else {
 583         strcat_printf(buf, sizeof(buf),
 584                       "tcc: ");
 585     }
 586     if (is_warning)
 587         strcat_printf(buf, sizeof(buf), "warning: ");
 588     else
 589         strcat_printf(buf, sizeof(buf), "error: ");
 590     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 591
 592     if (!s1->error_func) {
 593         /* default case: stderr */
 594         fprintf(stderr, "%s\n", buf);
 595     } else {
 596         s1->error_func(s1->error_opaque, buf);
 597     }
 598     if (!is_warning || s1->warn_error)
 599         s1->nb_errors++;
 600 }
 601
 602 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque,
 603                         void (*error_func)(void *opaque, const char *msg))
 604 {
 605     s->error_opaque = error_opaque;
 606     s->error_func = error_func;
 607 }
 608
 609 /* error without aborting current compilation */
 610 PUB_FUNC void tcc_error_noabort(const char *fmt, ...)
 611 {
 612     TCCState *s1 = tcc_state;
 613     va_list ap;
 614
 615     va_start(ap, fmt);
 616     error1(s1, 0, fmt, ap);
 617     va_end(ap);
 618 }
 619
 620 PUB_FUNC void tcc_error(const char *fmt, ...)
 621 {
 622     TCCState *s1 = tcc_state;
 623     va_list ap;
 624
 625     va_start(ap, fmt);
 626     error1(s1, 0, fmt, ap);
 627     va_end(ap);
 628     /* better than nothing: in some cases, we accept to handle errors */
 629     if (s1->error_set_jmp_enabled) {
 630         longjmp(s1->error_jmp_buf, 1);
 631     } else {
 632         /* XXX: eliminate this someday */
 633         exit(1);
 634     }
 635 }
 636
 637 PUB_FUNC void tcc_warning(const char *fmt, ...)
 638 {
 639     TCCState *s1 = tcc_state;
 640     va_list ap;
 641
 642     if (s1->warn_none)
 643         return;
 644
 645     va_start(ap, fmt);
 646     error1(s1, 1, fmt, ap);
 647     va_end(ap);
 648 }
 649
 650 /********************************************************/
 651 /* I/O layer */
 652
 653 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 654 {
 655     BufferedFile *bf;
 656     int buflen = initlen ? initlen : IO_BUF_SIZE;
 657
 658     bf = tcc_malloc(sizeof(BufferedFile) + buflen);
 659     bf->buf_ptr = bf->buffer;
 660     bf->buf_end = bf->buffer + initlen;
 661     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 662     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 663 #ifdef _WIN32
 664     normalize_slashes(bf->filename);
 665 #endif
 666     bf->line_num = 1;
 667     bf->ifndef_macro = 0;
 668     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 669     bf->fd = -1;
 670     bf->prev = file;
 671     file = bf;
 672 }
 673
 674 ST_FUNC void tcc_close(void)
 675 {
 676     BufferedFile *bf = file;
 677     if (bf->fd > 0) {
 678         close(bf->fd);
 679         total_lines += bf->line_num;
 680     }
 681     file = bf->prev;
 682     tcc_free(bf);
 683 }
 684
 685 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
 686 {
 687     int fd;
 688     if (strcmp(filename, "-") == 0)
 689         fd = 0, filename = "stdin";
 690     else
 691         fd = open(filename, O_RDONLY | O_BINARY);
 692     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 693         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 694                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 695     if (fd < 0)
 696         return -1;
 697
 698     tcc_open_bf(s1, filename, 0);
 699     file->fd = fd;
 700     return fd;
 701 }
 702
 703 /* compile the C file opened in 'file'. Return non zero if errors. */
 704 static int tcc_compile(TCCState *s1)
 705 {
 706     Sym *define_start;
 707     SValue *pvtop;
 708     char buf[512];
 709     volatile int section_sym;
 710
 711 #ifdef INC_DEBUG
 712     printf("%s: **** new file\n", file->filename);
 713 #endif
 714     preprocess_init(s1);
 715
 716     cur_text_section = NULL;
 717     funcname = "";
 718     anon_sym = SYM_FIRST_ANOM;
 719
 720     /* file info: full path + filename */
 721     section_sym = 0; /* avoid warning */
 722     if (s1->do_debug) {
 723         section_sym = put_elf_sym(symtab_section, 0, 0,
 724                                   ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
 725                                   text_section->sh_num, NULL);
 726         getcwd(buf, sizeof(buf));
 727 #ifdef _WIN32
 728         normalize_slashes(buf);
 729 #endif
 730         pstrcat(buf, sizeof(buf), "/");
 731         put_stabs_r(buf, N_SO, 0, 0,
 732                     text_section->data_offset, text_section, section_sym);
 733         put_stabs_r(file->filename, N_SO, 0, 0,
 734                     text_section->data_offset, text_section, section_sym);
 735     }
 736     /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
 737        symbols can be safely used */
 738     put_elf_sym(symtab_section, 0, 0,
 739                 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
 740                 SHN_ABS, file->filename);
 741
 742     /* define some often used types */
 743     int_type.t = VT_INT;
 744
 745     char_pointer_type.t = VT_BYTE;
 746     mk_pointer(&char_pointer_type);
 747
 748 #if PTR_SIZE == 4
 749     size_type.t = VT_INT;
 750 #else
 751     size_type.t = VT_LLONG;
 752 #endif
 753
 754     func_old_type.t = VT_FUNC;
 755     func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
 756
 757 #if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP)
 758     float_type.t = VT_FLOAT;
 759     double_type.t = VT_DOUBLE;
 760
 761     func_float_type.t = VT_FUNC;
 762     func_float_type.ref = sym_push(SYM_FIELD, &float_type, FUNC_CDECL, FUNC_OLD);
 763     func_double_type.t = VT_FUNC;
 764     func_double_type.ref = sym_push(SYM_FIELD, &double_type, FUNC_CDECL, FUNC_OLD);
 765 #endif
 766
 767 #if 0
 768     /* define 'void *alloca(unsigned int)' builtin function */
 769     {
 770         Sym *s1;
 771
 772         p = anon_sym++;
 773         sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
 774         s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
 775         s1->next = NULL;
 776         sym->next = s1;
 777         sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
 778     }
 779 #endif
 780
 781     define_start = define_stack;
 782     nocode_wanted = 1;
 783
 784     if (setjmp(s1->error_jmp_buf) == 0) {
 785         s1->nb_errors = 0;
 786         s1->error_set_jmp_enabled = 1;
 787
 788         ch = file->buf_ptr[0];
 789         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 790         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
 791         pvtop = vtop;
 792         next();
 793         decl(VT_CONST);
 794         if (tok != TOK_EOF)
 795             expect("declaration");
 796         if (pvtop != vtop)
 797             tcc_warning("internal compiler error: vstack leak? (%d)", vtop - pvtop);
 798
 799         /* end of translation unit info */
 800         if (s1->do_debug) {
 801             put_stabs_r(NULL, N_SO, 0, 0,
 802                         text_section->data_offset, text_section, section_sym);
 803         }
 804     }
 805
 806     s1->error_set_jmp_enabled = 0;
 807
 808     /* reset define stack, but leave -Dsymbols (may be incorrect if
 809        they are undefined) */
 810     free_defines(define_start);
 811
 812     gen_inline_functions();
 813
 814     sym_pop(&global_stack, NULL);
 815     sym_pop(&local_stack, NULL);
 816
 817     return s1->nb_errors != 0 ? -1 : 0;
 818 }
 819
 820 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 821 {
 822     int len, ret;
 823     len = strlen(str);
 824
 825     tcc_open_bf(s, "<string>", len);
 826     memcpy(file->buffer, str, len);
 827     ret = tcc_compile(s);
 828     tcc_close();
 829     return ret;
 830 }
 831
 832 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
 833 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 834 {
 835     int len1, len2;
 836     /* default value */
 837     if (!value)
 838         value = "1";
 839     len1 = strlen(sym);
 840     len2 = strlen(value);
 841
 842     /* init file structure */
 843     tcc_open_bf(s1, "<define>", len1 + len2 + 1);
 844     memcpy(file->buffer, sym, len1);
 845     file->buffer[len1] = ' ';
 846     memcpy(file->buffer + len1 + 1, value, len2);
 847
 848     /* parse with define parser */
 849     ch = file->buf_ptr[0];
 850     next_nomacro();
 851     parse_define();
 852
 853     tcc_close();
 854 }
 855
 856 /* undefine a preprocessor symbol */
 857 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 858 {
 859     TokenSym *ts;
 860     Sym *s;
 861     ts = tok_alloc(sym, strlen(sym));
 862     s = define_find(ts->tok);
 863     /* undefine symbol by putting an invalid name */
 864     if (s)
 865         define_undef(s);
 866 }
 867
 868 static void tcc_cleanup(void)
 869 {
 870     int i, n;
 871
 872     if (NULL == tcc_state)
 873         return;
 874     tcc_state = NULL;
 875
 876     /* free -D defines */
 877     free_defines(NULL);
 878
 879     /* free tokens */
 880     n = tok_ident - TOK_IDENT;
 881     for(i = 0; i < n; i++)
 882         tcc_free(table_ident[i]);
 883     tcc_free(table_ident);
 884
 885     /* free sym_pools */
 886     dynarray_reset(&sym_pools, &nb_sym_pools);
 887     /* string buffer */
 888     cstr_free(&tokcstr);
 889     /* reset symbol stack */
 890     sym_free_first = NULL;
 891     /* cleanup from error/setjmp */
 892     macro_ptr = NULL;
 893 }
 894
 895 LIBTCCAPI TCCState *tcc_new(void)
 896 {
 897     TCCState *s;
 898     char buffer[100];
 899     int a,b,c;
 900
 901     tcc_cleanup();
 902
 903     s = tcc_mallocz(sizeof(TCCState));
 904     if (!s)
 905         return NULL;
 906     tcc_state = s;
 907 #ifdef _WIN32
 908     tcc_set_lib_path_w32(s);
 909 #else
 910     tcc_set_lib_path(s, CONFIG_TCCDIR);
 911 #endif
 912     s->output_type = TCC_OUTPUT_MEMORY;
 913     preprocess_new();
 914     s->include_stack_ptr = s->include_stack;
 915
 916     /* we add dummy defines for some special macros to speed up tests
 917        and to have working defined() */
 918     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
 919     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
 920     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
 921     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
 922
 923     /* standard defines */
 924     tcc_define_symbol(s, "__STDC__", NULL);
 925     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 926 #if defined(TCC_TARGET_I386)
 927     tcc_define_symbol(s, "__i386__", NULL);
 928     tcc_define_symbol(s, "__i386", NULL);
 929     tcc_define_symbol(s, "i386", NULL);
 930 #endif
 931 #if defined(TCC_TARGET_X86_64)
 932     tcc_define_symbol(s, "__x86_64__", NULL);
 933 #endif
 934 #if defined(TCC_TARGET_ARM)
 935     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 936     tcc_define_symbol(s, "__arm_elf__", NULL);
 937     tcc_define_symbol(s, "__arm_elf", NULL);
 938     tcc_define_symbol(s, "arm_elf", NULL);
 939     tcc_define_symbol(s, "__arm__", NULL);
 940     tcc_define_symbol(s, "__arm", NULL);
 941     tcc_define_symbol(s, "arm", NULL);
 942     tcc_define_symbol(s, "__APCS_32__", NULL);
 943 #endif
 944 #ifdef TCC_TARGET_PE
 945     tcc_define_symbol(s, "_WIN32", NULL);
 946 #ifdef TCC_TARGET_X86_64
 947     tcc_define_symbol(s, "_WIN64", NULL);
 948 #endif
 949 #else
 950     tcc_define_symbol(s, "__unix__", NULL);
 951     tcc_define_symbol(s, "__unix", NULL);
 952     tcc_define_symbol(s, "unix", NULL);
 953 #if defined(__FreeBSD__)
 954 #define str(s) #s
 955     tcc_define_symbol(s, "__FreeBSD__", str( __FreeBSD__));
 956 #undef str
 957 #endif
 958 #if defined(__FreeBSD_kernel__)
 959     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
 960 #endif
 961 #if defined(__linux)
 962     tcc_define_symbol(s, "__linux__", NULL);
 963     tcc_define_symbol(s, "__linux", NULL);
 964 #endif
 965 #endif
 966     /* tiny C specific defines */
 967     sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
 968     sprintf(buffer, "%d", a*10000 + b*100 + c);
 969     tcc_define_symbol(s, "__TINYC__", buffer);
 970
 971     /* tiny C & gcc defines */
 972 #if defined TCC_TARGET_PE && defined TCC_TARGET_X86_64
 973     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
 974     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
 975 #else
 976     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 977     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 978 #endif
 979
 980 #ifdef TCC_TARGET_PE
 981     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
 982 #else
 983     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
 984 #endif
 985
 986     /* glibc defines */
 987     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)", "name proto __asm__ (#alias)");
 988     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)", "name proto __asm__ (#alias) __THROW");
 989
 990 #ifndef TCC_TARGET_PE
 991     /* default library paths */
 992     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
 993     /* paths for crt objects */
 994     tcc_split_path(s, (void ***)&s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
 995 #endif
 996
 997     /* no section zero */
 998     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
 999
1000     /* create standard sections */
1001     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
1002     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
1003     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
1004
1005     /* symbols are always generated for linking stage */
1006     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
1007                                 ".strtab",
1008                                 ".hashtab", SHF_PRIVATE);
1009     strtab_section = symtab_section->link;
1010     s->symtab = symtab_section;
1011
1012     /* private symbol table for dynamic symbols */
1013     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
1014                                       ".dynstrtab",
1015                                       ".dynhashtab", SHF_PRIVATE);
1016     s->alacarte_link = 1;
1017     s->nocommon = 1;
1018
1019 #ifdef CHAR_IS_UNSIGNED
1020     s->char_is_unsigned = 1;
1021 #endif
1022     /* enable this if you want symbols with leading underscore on windows: */
1023 #if defined(TCC_TARGET_PE) && 0
1024     s->leading_underscore = 1;
1025 #endif
1026     if (s->section_align == 0)
1027         s->section_align = ELF_PAGE_SIZE;
1028 #ifdef TCC_TARGET_I386
1029     s->seg_size = 32;
1030 #endif
1031     return s;
1032 }
1033
1034 LIBTCCAPI void tcc_delete(TCCState *s1)
1035 {
1036     int i;
1037
1038     tcc_cleanup();
1039
1040     /* free all sections */
1041     for(i = 1; i < s1->nb_sections; i++)
1042         free_section(s1->sections[i]);
1043     dynarray_reset(&s1->sections, &s1->nb_sections);
1044
1045     for(i = 0; i < s1->nb_priv_sections; i++)
1046         free_section(s1->priv_sections[i]);
1047     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1048
1049     /* free any loaded DLLs */
1050     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1051         DLLReference *ref = s1->loaded_dlls[i];
1052         if ( ref->handle )
1053             dlclose(ref->handle);
1054     }
1055
1056     /* free loaded dlls array */
1057     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1058
1059     /* free library paths */
1060     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1061     dynarray_reset(&s1->crt_paths, &s1->nb_crt_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     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
1069
1070     tcc_free(s1->tcc_lib_path);
1071
1072 #ifdef HAVE_SELINUX
1073     munmap (s1->write_mem, s1->mem_size);
1074     munmap (s1->runtime_mem, s1->mem_size);
1075 #else
1076     tcc_free(s1->runtime_mem);
1077 #endif
1078     tcc_free(s1);
1079 }
1080
1081 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
1082 {
1083     tcc_split_path(s, (void ***)&s->include_paths, &s->nb_include_paths, pathname);
1084     return 0;
1085 }
1086
1087 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
1088 {
1089     tcc_split_path(s, (void ***)&s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
1090     return 0;
1091 }
1092
1093 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1094 {
1095     const char *ext;
1096     ElfW(Ehdr) ehdr;
1097     int fd, ret, size;
1098
1099     /* find source file type with extension */
1100     ext = tcc_fileextension(filename);
1101     if (ext[0])
1102         ext++;
1103
1104 #ifdef CONFIG_TCC_ASM
1105     /* if .S file, define __ASSEMBLER__ like gcc does */
1106     if (!strcmp(ext, "S"))
1107         tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
1108 #endif
1109
1110     /* open the file */
1111     ret = tcc_open(s1, filename);
1112     if (ret < 0) {
1113         if (flags & AFF_PRINT_ERROR)
1114             tcc_error_noabort("file '%s' not found", filename);
1115         return ret;
1116     }
1117
1118     /* update target deps */
1119     dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1120             tcc_strdup(filename));
1121
1122     if (flags & AFF_PREPROCESS) {
1123         ret = tcc_preprocess(s1);
1124         goto the_end;
1125     }
1126
1127     if (!ext[0] || !PATHCMP(ext, "c")) {
1128         /* C file assumed */
1129         ret = tcc_compile(s1);
1130         goto the_end;
1131     }
1132
1133 #ifdef CONFIG_TCC_ASM
1134     if (!strcmp(ext, "S")) {
1135         /* preprocessed assembler */
1136         ret = tcc_assemble(s1, 1);
1137         goto the_end;
1138     }
1139
1140     if (!strcmp(ext, "s")) {
1141         /* non preprocessed assembler */
1142         ret = tcc_assemble(s1, 0);
1143         goto the_end;
1144     }
1145 #endif
1146
1147     fd = file->fd;
1148     /* assume executable format: auto guess file type */
1149     size = read(fd, &ehdr, sizeof(ehdr));
1150     lseek(fd, 0, SEEK_SET);
1151     if (size <= 0) {
1152         tcc_error_noabort("could not read header");
1153         goto the_end;
1154     }
1155
1156     if (size == sizeof(ehdr) &&
1157         ehdr.e_ident[0] == ELFMAG0 &&
1158         ehdr.e_ident[1] == ELFMAG1 &&
1159         ehdr.e_ident[2] == ELFMAG2 &&
1160         ehdr.e_ident[3] == ELFMAG3) {
1161
1162         /* do not display line number if error */
1163         file->line_num = 0;
1164         if (ehdr.e_type == ET_REL) {
1165             ret = tcc_load_object_file(s1, fd, 0);
1166             goto the_end;
1167
1168         }
1169 #ifndef TCC_TARGET_PE
1170         if (ehdr.e_type == ET_DYN) {
1171             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1172                 void *h;
1173                 h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1174                 if (h)
1175                     ret = 0;
1176             } else {
1177                 ret = tcc_load_dll(s1, fd, filename,
1178                                    (flags & AFF_REFERENCED_DLL) != 0);
1179             }
1180             goto the_end;
1181         }
1182 #endif
1183         tcc_error_noabort("unrecognized ELF file");
1184         goto the_end;
1185     }
1186
1187     if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
1188         file->line_num = 0; /* do not display line number if error */
1189         ret = tcc_load_archive(s1, fd);
1190         goto the_end;
1191     }
1192
1193 #ifdef TCC_TARGET_COFF
1194     if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
1195         ret = tcc_load_coff(s1, fd);
1196         goto the_end;
1197     }
1198 #endif
1199
1200 #ifdef TCC_TARGET_PE
1201     ret = pe_load_file(s1, filename, fd);
1202 #else
1203     /* as GNU ld, consider it is an ld script if not recognized */
1204     ret = tcc_load_ldscript(s1);
1205 #endif
1206     if (ret < 0)
1207         tcc_error_noabort("unrecognized file type");
1208
1209 the_end:
1210     tcc_close();
1211     return ret;
1212 }
1213
1214 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1215 {
1216     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1217         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS);
1218     else
1219         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR);
1220 }
1221
1222 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1223 {
1224     tcc_split_path(s, (void ***)&s->library_paths, &s->nb_library_paths, pathname);
1225     return 0;
1226 }
1227
1228 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1229     const char *filename, int flags, char **paths, int nb_paths)
1230 {
1231     char buf[1024];
1232     int i;
1233
1234     for(i = 0; i < nb_paths; i++) {
1235         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1236         if (tcc_add_file_internal(s, buf, flags) == 0)
1237             return 0;
1238     }
1239     return -1;
1240 }
1241
1242 #ifndef TCC_TARGET_PE
1243 /* find and load a dll. Return non zero if not found */
1244 /* XXX: add '-rpath' option support ? */
1245 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1246 {
1247     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1248         s->library_paths, s->nb_library_paths);
1249 }
1250 #endif
1251
1252 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename)
1253 {
1254     if (-1 == tcc_add_library_internal(s, "%s/%s",
1255         filename, 0, s->crt_paths, s->nb_crt_paths))
1256         tcc_error_noabort("file '%s' not found", filename);
1257     return 0;
1258 }
1259
1260 /* the library name is the same as the argument of the '-l' option */
1261 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1262 {
1263 #ifdef TCC_TARGET_PE
1264     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1265     const char **pp = s->static_link ? libs + 4 : libs;
1266 #else
1267     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1268     const char **pp = s->static_link ? libs + 1 : libs;
1269 #endif
1270     while (*pp) {
1271         if (0 == tcc_add_library_internal(s, *pp,
1272             libraryname, 0, s->library_paths, s->nb_library_paths))
1273             return 0;
1274         ++pp;
1275     }
1276     return -1;
1277 }
1278
1279 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1280 {
1281 #ifdef TCC_TARGET_PE
1282     pe_putimport(s, 0, name, val);
1283 #else
1284     add_elf_sym(symtab_section, (uplong)val, 0,
1285                 ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1286                 SHN_ABS, name);
1287 #endif
1288     return 0;
1289 }
1290
1291 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
1292 {
1293     s->output_type = output_type;
1294
1295     if (!s->nostdinc) {
1296         /* default include paths */
1297         /* -isystem paths have already been handled */
1298         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
1299     }
1300
1301     /* if bound checking, then add corresponding sections */
1302 #ifdef CONFIG_TCC_BCHECK
1303     if (s->do_bounds_check) {
1304         /* define symbol */
1305         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1306         /* create bounds sections */
1307         bounds_section = new_section(s, ".bounds",
1308                                      SHT_PROGBITS, SHF_ALLOC);
1309         lbounds_section = new_section(s, ".lbounds",
1310                                       SHT_PROGBITS, SHF_ALLOC);
1311     }
1312 #endif
1313
1314     if (s->char_is_unsigned) {
1315         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
1316     }
1317
1318     /* add debug sections */
1319     if (s->do_debug) {
1320         /* stab symbols */
1321         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
1322         stab_section->sh_entsize = sizeof(Stab_Sym);
1323         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
1324         put_elf_str(stabstr_section, "");
1325         stab_section->link = stabstr_section;
1326         /* put first entry */
1327         put_stabs("", 0, 0, 0, 0);
1328     }
1329
1330 #ifdef TCC_TARGET_PE
1331     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
1332 # ifdef _WIN32
1333     tcc_add_systemdir(s);
1334 # endif
1335 #else
1336     /* add libc crt1/crti objects */
1337     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1338         !s->nostdlib) {
1339         if (output_type != TCC_OUTPUT_DLL)
1340             tcc_add_crt(s, "crt1.o");
1341         tcc_add_crt(s, "crti.o");
1342     }
1343 #endif
1344     return 0;
1345 }
1346
1347 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1348 #define FD_INVERT 0x0002 /* invert value before storing */
1349
1350 typedef struct FlagDef {
1351     uint16_t offset;
1352     uint16_t flags;
1353     const char *name;
1354 } FlagDef;
1355
1356 static const FlagDef warning_defs[] = {
1357     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1358     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1359     { offsetof(TCCState, warn_error), 0, "error" },
1360     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1361       "implicit-function-declaration" },
1362 };
1363
1364 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1365                     const char *name, int value)
1366 {
1367     int i;
1368     const FlagDef *p;
1369     const char *r;
1370
1371     r = name;
1372     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
1373         r += 3;
1374         value = !value;
1375     }
1376     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1377         if (!strcmp(r, p->name))
1378             goto found;
1379     }
1380     return -1;
1381  found:
1382     if (p->flags & FD_INVERT)
1383         value = !value;
1384     *(int *)((uint8_t *)s + p->offset) = value;
1385     return 0;
1386 }
1387
1388 /* enable debug */
1389 LIBTCCAPI void tcc_enable_debug(TCCState *s)
1390 {
1391     s->do_debug = 1;
1392 }
1393
1394 /* set/reset a warning */
1395 LIBTCCAPI int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1396 {
1397     int i;
1398     const FlagDef *p;
1399
1400     if (!strcmp(warning_name, "all")) {
1401         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1402             if (p->flags & WD_ALL)
1403                 *(int *)((uint8_t *)s + p->offset) = 1;
1404         }
1405         return 0;
1406     } else {
1407         return set_flag(s, warning_defs, countof(warning_defs),
1408                         warning_name, value);
1409     }
1410 }
1411
1412 static const FlagDef flag_defs[] = {
1413     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1414     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1415     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1416     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1417 };
1418
1419 /* set/reset a flag */
1420 PUB_FUNC int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1421 {
1422     return set_flag(s, flag_defs, countof(flag_defs),
1423                     flag_name, value);
1424 }
1425
1426
1427 static int strstart(const char *str, const char *val, char **ptr)
1428 {
1429     const char *p, *q;
1430     p = str;
1431     q = val;
1432     while (*q != '\0') {
1433         if (*p != *q)
1434             return 0;
1435         p++;
1436         q++;
1437     }
1438     if (ptr)
1439         *ptr = (char *) p;
1440     return 1;
1441 }
1442
1443
1444 /* Like strstart, but automatically takes into account that ld options can
1445  *
1446  * - start with double or single dash (e.g. '--soname' or '-soname')
1447  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1448  *   or '-Wl,-soname=x.so')
1449  *
1450  * you provide `val` always in 'option[=]' form (no leading -)
1451  */
1452 static int link_option(const char *str, const char *val, char **ptr)
1453 {
1454     const char *p, *q;
1455
1456     /* there should be 1 or 2 dashes */
1457     if (*str++ != '-')
1458         return 0;
1459     if (*str == '-')
1460         str++;
1461
1462     /* then str & val should match (potentialy up to '=') */
1463     p = str;
1464     q = val;
1465
1466     while (*q != '\0' && *q != '=') {
1467         if (*p != *q)
1468             return 0;
1469         p++;
1470         q++;
1471     }
1472
1473     /* '=' near eos means ',' or '=' is ok */
1474     if (*q == '=') {
1475         if (*p != ',' && *p != '=')
1476             return 0;
1477         p++;
1478         q++;
1479     }
1480
1481     if (ptr)
1482         *ptr = (char *) p;
1483     return 1;
1484 }
1485
1486
1487 /* set linker options */
1488 PUB_FUNC const char * tcc_set_linker(TCCState *s, char *option, int multi)
1489 {
1490     char *p = option;
1491     char *end;
1492
1493     while (option && *option) {
1494         end = NULL;
1495         if (link_option(option, "Bsymbolic", &p)) {
1496             s->symbolic = TRUE;
1497         } else if (link_option(option, "nostdlib", &p)) {
1498             s->nostdlib = TRUE;
1499         } else if (link_option(option, "fini=", &p)) {
1500             s->fini_symbol = p;
1501             if (s->warn_unsupported)
1502                 tcc_warning("ignoring -fini %s", p);
1503         } else if (link_option(option, "image-base=", &p)) {
1504             s->text_addr = strtoull(p, &end, 16);
1505             s->has_text_addr = 1;
1506         } else if (link_option(option, "init=", &p)) {
1507             s->init_symbol = p;
1508             if (s->warn_unsupported)
1509                 tcc_warning("ignoring -init %s", p);
1510         } else if (link_option(option, "oformat=", &p)) {
1511 #if defined(TCC_TARGET_PE)
1512             if (strstart(p, "pe-", NULL)) {
1513 #else
1514 #if defined(TCC_TARGET_X86_64)
1515             if (strstart(p, "elf64-", NULL)) {
1516 #else
1517             if (strstart(p, "elf32-", NULL)) {
1518 #endif
1519 #endif
1520                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1521             } else if (!strcmp(p, "binary")) {
1522                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1523             } else
1524 #ifdef TCC_TARGET_COFF
1525             if (!strcmp(p, "coff")) {
1526                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1527             } else
1528 #endif
1529             {
1530                 return p;
1531             }
1532
1533         } else if (link_option(option, "rpath=", &p)) {
1534             s->rpath = p;
1535         } else if (link_option(option, "section-alignment=", &p)) {
1536             s->section_align = strtoul(p, &end, 16);
1537         } else if (link_option(option, "soname=", &p)) {
1538             s->soname = p;
1539             multi = 0;
1540 #ifdef TCC_TARGET_PE
1541         } else if (link_option(option, "file-alignment=", &p)) {
1542             s->pe_file_align = strtoul(p, &end, 16);
1543         } else if (link_option(option, "stack=", &p)) {
1544             s->pe_stack_size = strtoul(p, &end, 10);
1545         } else if (link_option(option, "subsystem=", &p)) {
1546 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1547             if (!strcmp(p, "native")) {
1548                 s->pe_subsystem = 1;
1549             } else if (!strcmp(p, "console")) {
1550                 s->pe_subsystem = 3;
1551             } else if (!strcmp(p, "gui")) {
1552                 s->pe_subsystem = 2;
1553             } else if (!strcmp(p, "posix")) {
1554                 s->pe_subsystem = 7;
1555             } else if (!strcmp(p, "efiapp")) {
1556                 s->pe_subsystem = 10;
1557             } else if (!strcmp(p, "efiboot")) {
1558                 s->pe_subsystem = 11;
1559             } else if (!strcmp(p, "efiruntime")) {
1560                 s->pe_subsystem = 12;
1561             } else if (!strcmp(p, "efirom")) {
1562                 s->pe_subsystem = 13;
1563 #elif defined(TCC_TARGET_ARM)
1564             if (!strcmp(p, "wince")) {
1565                 s->pe_subsystem = 9;
1566 #endif
1567             } else {
1568                 return p;
1569             }
1570 #endif
1571
1572         } else if (link_option(option, "Ttext=", &p)) {
1573             s->text_addr = strtoull(p, &end, 16);
1574             s->has_text_addr = 1;
1575         } else {
1576             char *comma_ptr = strchr(option, ',');
1577             if (comma_ptr)
1578                 *comma_ptr = '\0';
1579             return option;
1580         }
1581
1582         if (multi) {
1583             option = NULL;
1584             p = strchr( (end) ? end : p, ',');
1585             if (p) {
1586                 *p = 0;    /* terminate last option */
1587                 option = ++p;
1588             }
1589         } else
1590             option = NULL;
1591     }
1592     return NULL;
1593 }
1594
1595 PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time)
1596 {
1597     double tt;
1598     tt = (double)total_time / 1000000.0;
1599     if (tt < 0.001)
1600         tt = 0.001;
1601     if (total_bytes < 1)
1602         total_bytes = 1;
1603     printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
1604            tok_ident - TOK_IDENT, total_lines, total_bytes,
1605            tt, (int)(total_lines / tt),
1606            total_bytes / tt / 1000000.0);
1607 }
1608
1609 /* set CONFIG_TCCDIR at runtime */
1610 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1611 {
1612     tcc_free(s->tcc_lib_path);
1613     s->tcc_lib_path = tcc_strdup(path);
1614 }
1615
1616 PUB_FUNC char *tcc_default_target(TCCState *s, const char *default_file)
1617 {
1618     char buf[1024];
1619     char *ext;
1620     const char *name = "a";
1621
1622     if (default_file && strcmp(default_file, "-"))
1623         name = tcc_basename(default_file);
1624     pstrcpy(buf, sizeof(buf), name);
1625     ext = tcc_fileextension(buf);
1626 #ifdef TCC_TARGET_PE
1627     if (s->output_type == TCC_OUTPUT_DLL)
1628         strcpy(ext, ".dll");
1629     else
1630     if (s->output_type == TCC_OUTPUT_EXE)
1631         strcpy(ext, ".exe");
1632     else
1633 #endif
1634     if (( (s->output_type == TCC_OUTPUT_OBJ && !s->reloc_output) ||
1635           (s->output_type == TCC_OUTPUT_PREPROCESS) )
1636         && *ext)
1637         strcpy(ext, ".o");
1638     else
1639         strcpy(buf, "a.out");
1640
1641     return tcc_strdup(buf);
1642 }
1643
1644
1645 PUB_FUNC void tcc_gen_makedeps(TCCState *s, const char *target, const char *filename)
1646 {
1647     FILE *depout;
1648     char buf[1024], *ext;
1649     int i;
1650
1651     if (!filename) {
1652         /* compute filename automatically
1653          * dir/file.o -> dir/file.d             */
1654         pstrcpy(buf, sizeof(buf), target);
1655         ext = tcc_fileextension(buf);
1656         pstrcpy(ext, sizeof(buf) - (ext-buf), ".d");
1657         filename = buf;
1658     }
1659
1660     if (s->verbose)
1661         printf("<- %s\n", filename);
1662
1663     /* XXX return err codes instead of error() ? */
1664     depout = fopen(filename, "w");
1665     if (!depout)
1666         tcc_error("could not open '%s'", filename);
1667
1668     fprintf(depout, "%s : \\\n", target);
1669     for (i=0; i<s->nb_target_deps; ++i)
1670         fprintf(depout, " %s \\\n", s->target_deps[i]);
1671     fprintf(depout, "\n");
1672     fclose(depout);
1673 }