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