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 #ifndef _WIN32
  38 #include <limits.h>
  39 #endif
  40
  41 #ifdef ONE_SOURCE
  42 #include "tccpp.c"
  43 #include "tccgen.c"
  44 #include "tccelf.c"
  45 #include "tccrun.c"
  46 #ifdef TCC_TARGET_I386
  47 #include "i386-gen.c"
  48 #endif
  49 #ifdef TCC_TARGET_ARM
  50 #include "arm-gen.c"
  51 #endif
  52 #ifdef TCC_TARGET_C67
  53 #include "c67-gen.c"
  54 #endif
  55 #ifdef TCC_TARGET_X86_64
  56 #include "x86_64-gen.c"
  57 #endif
  58 #ifdef CONFIG_TCC_ASM
  59 #include "tccasm.c"
  60 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
  61 #include "i386-asm.c"
  62 #endif
  63 #endif
  64 #ifdef TCC_TARGET_COFF
  65 #include "tcccoff.c"
  66 #endif
  67 #ifdef TCC_TARGET_PE
  68 #include "tccpe.c"
  69 #endif
  70 #endif /* ONE_SOURCE */
  71
  72 /********************************************************/
  73 #ifndef CONFIG_TCC_ASM
  74 ST_FUNC void asm_instr(void)
  75 {
  76     tcc_error("inline asm() not supported");
  77 }
  78 ST_FUNC void asm_global_instr(void)
  79 {
  80     tcc_error("inline asm() not supported");
  81 }
  82 #endif
  83
  84 /********************************************************/
  85
  86 #ifdef _WIN32
  87 static char *normalize_slashes(char *path)
  88 {
  89     char *p;
  90     for (p = path; *p; ++p)
  91         if (*p == '\\')
  92             *p = '/';
  93     return path;
  94 }
  95
  96 static HMODULE tcc_module;
  97
  98 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
  99 static void tcc_set_lib_path_w32(TCCState *s)
 100 {
 101     char path[1024], *p;
 102     GetModuleFileNameA(tcc_module, path, sizeof path);
 103     p = tcc_basename(normalize_slashes(strlwr(path)));
 104     if (p - 5 > path && 0 == strncmp(p - 5, "/bin/", 5))
 105         p -= 5;
 106     else if (p > path)
 107         p--;
 108     *p = 0;
 109     tcc_set_lib_path(s, path);
 110 }
 111
 112 static void tcc_add_systemdir(TCCState *s)
 113 {
 114     char buf[1000];
 115     GetSystemDirectory(buf, sizeof buf);
 116     tcc_add_library_path(s, normalize_slashes(buf));
 117 }
 118
 119 #ifndef CONFIG_TCC_STATIC
 120 void dlclose(void *p)
 121 {
 122     FreeLibrary((HMODULE)p);
 123 }
 124 #endif
 125
 126 #ifdef LIBTCC_AS_DLL
 127 BOOL WINAPI DllMain (HANDLE hDll, DWORD dwReason, LPVOID lpReserved)
 128 {
 129     if (DLL_PROCESS_ATTACH == dwReason)
 130         tcc_module = hDll;
 131     return TRUE;
 132 }
 133 #endif
 134 #endif
 135
 136 /********************************************************/
 137 /* copy a string and truncate it. */
 138 PUB_FUNC char *pstrcpy(char *buf, int buf_size, const char *s)
 139 {
 140     char *q, *q_end;
 141     int c;
 142
 143     if (buf_size > 0) {
 144         q = buf;
 145         q_end = buf + buf_size - 1;
 146         while (q < q_end) {
 147             c = *s++;
 148             if (c == '\0')
 149                 break;
 150             *q++ = c;
 151         }
 152         *q = '\0';
 153     }
 154     return buf;
 155 }
 156
 157 /* strcat and truncate. */
 158 PUB_FUNC char *pstrcat(char *buf, int buf_size, const char *s)
 159 {
 160     int len;
 161     len = strlen(buf);
 162     if (len < buf_size)
 163         pstrcpy(buf + len, buf_size - len, s);
 164     return buf;
 165 }
 166
 167 PUB_FUNC char *pstrncpy(char *out, const char *in, size_t num)
 168 {
 169     memcpy(out, in, num);
 170     out[num] = '\0';
 171     return out;
 172 }
 173
 174 /* extract the basename of a file */
 175 PUB_FUNC char *tcc_basename(const char *name)
 176 {
 177     char *p = strchr(name, 0);
 178     while (p > name && !IS_DIRSEP(p[-1]))
 179         --p;
 180     return p;
 181 }
 182
 183 /* extract extension part of a file
 184  *
 185  * (if no extension, return pointer to end-of-string)
 186  */
 187 PUB_FUNC char *tcc_fileextension (const char *name)
 188 {
 189     char *b = tcc_basename(name);
 190     char *e = strrchr(b, '.');
 191     return e ? e : strchr(b, 0);
 192 }
 193
 194 /********************************************************/
 195 /* memory management */
 196
 197 #undef free
 198 #undef malloc
 199 #undef realloc
 200
 201 #ifdef MEM_DEBUG
 202 int mem_cur_size;
 203 int mem_max_size;
 204 unsigned malloc_usable_size(void*);
 205 #endif
 206
 207 PUB_FUNC void tcc_free(void *ptr)
 208 {
 209 #ifdef MEM_DEBUG
 210     mem_cur_size -= malloc_usable_size(ptr);
 211 #endif
 212     free(ptr);
 213 }
 214
 215 PUB_FUNC void *tcc_malloc(unsigned long size)
 216 {
 217     void *ptr;
 218     ptr = malloc(size);
 219     if (!ptr && size)
 220         tcc_error("memory full");
 221 #ifdef MEM_DEBUG
 222     mem_cur_size += malloc_usable_size(ptr);
 223     if (mem_cur_size > mem_max_size)
 224         mem_max_size = mem_cur_size;
 225 #endif
 226     return ptr;
 227 }
 228
 229 PUB_FUNC void *tcc_mallocz(unsigned long size)
 230 {
 231     void *ptr;
 232     ptr = tcc_malloc(size);
 233     memset(ptr, 0, size);
 234     return ptr;
 235 }
 236
 237 PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
 238 {
 239     void *ptr1;
 240 #ifdef MEM_DEBUG
 241     mem_cur_size -= malloc_usable_size(ptr);
 242 #endif
 243     ptr1 = realloc(ptr, size);
 244     if (!ptr1 && size)
 245         tcc_error("memory full");
 246 #ifdef MEM_DEBUG
 247     /* NOTE: count not correct if alloc error, but not critical */
 248     mem_cur_size += malloc_usable_size(ptr1);
 249     if (mem_cur_size > mem_max_size)
 250         mem_max_size = mem_cur_size;
 251 #endif
 252     return ptr1;
 253 }
 254
 255 PUB_FUNC char *tcc_strdup(const char *str)
 256 {
 257     char *ptr;
 258     ptr = tcc_malloc(strlen(str) + 1);
 259     strcpy(ptr, str);
 260     return ptr;
 261 }
 262
 263 PUB_FUNC void tcc_memstats(void)
 264 {
 265 #ifdef MEM_DEBUG
 266     printf("memory in use: %d\n", mem_cur_size);
 267 #endif
 268 }
 269
 270 #define free(p) use_tcc_free(p)
 271 #define malloc(s) use_tcc_malloc(s)
 272 #define realloc(p, s) use_tcc_realloc(p, s)
 273
 274 /********************************************************/
 275 /* dynarrays */
 276
 277 PUB_FUNC void dynarray_add(void ***ptab, int *nb_ptr, void *data)
 278 {
 279     int nb, nb_alloc;
 280     void **pp;
 281
 282     nb = *nb_ptr;
 283     pp = *ptab;
 284     /* every power of two we double array size */
 285     if ((nb & (nb - 1)) == 0) {
 286         if (!nb)
 287             nb_alloc = 1;
 288         else
 289             nb_alloc = nb * 2;
 290         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 291         *ptab = pp;
 292     }
 293     pp[nb++] = data;
 294     *nb_ptr = nb;
 295 }
 296
 297 PUB_FUNC void dynarray_reset(void *pp, int *n)
 298 {
 299     void **p;
 300     for (p = *(void***)pp; *n; ++p, --*n)
 301         if (*p)
 302             tcc_free(*p);
 303     tcc_free(*(void**)pp);
 304     *(void**)pp = NULL;
 305 }
 306
 307 static void tcc_split_path(TCCState *s, void ***p_ary, int *p_nb_ary, const char *in)
 308 {
 309     const char *p;
 310     do {
 311         int c;
 312         CString str;
 313
 314         cstr_new(&str);
 315         for (p = in; c = *p, c != '\0' && c != PATHSEP; ++p) {
 316             if (c == '{' && p[1] && p[2] == '}') {
 317                 c = p[1], p += 2;
 318                 if (c == 'B')
 319                     cstr_cat(&str, s->tcc_lib_path);
 320             } else {
 321                 cstr_ccat(&str, c);
 322             }
 323         }
 324         cstr_ccat(&str, '\0');
 325 #ifndef _WIN32
 326         {
 327             int i, do_include;
 328             char tmp[PATH_MAX];
 329
 330             if (realpath(str.data, tmp)) {
 331                 str.size = 0;
 332                 cstr_cat(&str, tmp);
 333                 cstr_ccat(&str, '\0');
 334             }
 335
 336             do_include = 1;
 337             for (i = 0; i < *p_nb_ary && do_include; i++) {
 338                 do_include = do_include &&
 339                     strcmp((char*)str.data, (char*)(*p_ary)[i]);
 340             }
 341
 342             if (do_include) {
 343                 dynarray_add(p_ary, p_nb_ary, str.data);
 344             }
 345         }
 346 #else
 347         dynarray_add(p_ary, p_nb_ary, str.data);
 348 #endif
 349         in = p+1;
 350     } while (*p);
 351 }
 352
 353 /********************************************************/
 354
 355 ST_FUNC Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags)
 356 {
 357     Section *sec;
 358
 359     sec = tcc_mallocz(sizeof(Section) + strlen(name));
 360     strcpy(sec->name, name);
 361     sec->sh_type = sh_type;
 362     sec->sh_flags = sh_flags;
 363     switch(sh_type) {
 364     case SHT_HASH:
 365     case SHT_REL:
 366     case SHT_RELA:
 367     case SHT_DYNSYM:
 368     case SHT_SYMTAB:
 369     case SHT_DYNAMIC:
 370         sec->sh_addralign = 4;
 371         break;
 372     case SHT_STRTAB:
 373         sec->sh_addralign = 1;
 374         break;
 375     default:
 376         sec->sh_addralign = 32; /* default conservative alignment */
 377         break;
 378     }
 379
 380     if (sh_flags & SHF_PRIVATE) {
 381         dynarray_add((void ***)&s1->priv_sections, &s1->nb_priv_sections, sec);
 382     } else {
 383         sec->sh_num = s1->nb_sections;
 384         dynarray_add((void ***)&s1->sections, &s1->nb_sections, sec);
 385     }
 386
 387     return sec;
 388 }
 389
 390 static void free_section(Section *s)
 391 {
 392     tcc_free(s->data);
 393 }
 394
 395 /* realloc section and set its content to zero */
 396 ST_FUNC void section_realloc(Section *sec, unsigned long new_size)
 397 {
 398     unsigned long size;
 399     unsigned char *data;
 400
 401     size = sec->data_allocated;
 402     if (size == 0)
 403         size = 1;
 404     while (size < new_size)
 405         size = size * 2;
 406     data = tcc_realloc(sec->data, size);
 407     memset(data + sec->data_allocated, 0, size - sec->data_allocated);
 408     sec->data = data;
 409     sec->data_allocated = size;
 410 }
 411
 412 /* reserve at least 'size' bytes in section 'sec' from
 413    sec->data_offset. */
 414 ST_FUNC void *section_ptr_add(Section *sec, unsigned long size)
 415 {
 416     unsigned long offset, offset1;
 417
 418     offset = sec->data_offset;
 419     offset1 = offset + size;
 420     if (offset1 > sec->data_allocated)
 421         section_realloc(sec, offset1);
 422     sec->data_offset = offset1;
 423     return sec->data + offset;
 424 }
 425
 426 /* reserve at least 'size' bytes from section start */
 427 ST_FUNC void section_reserve(Section *sec, unsigned long size)
 428 {
 429     if (size > sec->data_allocated)
 430         section_realloc(sec, size);
 431     if (size > sec->data_offset)
 432         sec->data_offset = size;
 433 }
 434
 435 /* return a reference to a section, and create it if it does not
 436    exists */
 437 ST_FUNC Section *find_section(TCCState *s1, const char *name)
 438 {
 439     Section *sec;
 440     int i;
 441     for(i = 1; i < s1->nb_sections; i++) {
 442         sec = s1->sections[i];
 443         if (!strcmp(name, sec->name))
 444             return sec;
 445     }
 446     /* sections are created as PROGBITS */
 447     return new_section(s1, name, SHT_PROGBITS, SHF_ALLOC);
 448 }
 449
 450 /* update sym->c so that it points to an external symbol in section
 451    'section' with value 'value' */
 452 ST_FUNC void put_extern_sym2(Sym *sym, Section *section,
 453                             uplong value, unsigned long size,
 454                             int can_add_underscore)
 455 {
 456     int sym_type, sym_bind, sh_num, info, other;
 457     ElfW(Sym) *esym;
 458     const char *name;
 459     char buf1[256];
 460
 461     if (section == NULL)
 462         sh_num = SHN_UNDEF;
 463     else if (section == SECTION_ABS)
 464         sh_num = SHN_ABS;
 465     else
 466         sh_num = section->sh_num;
 467
 468     if ((sym->type.t & VT_BTYPE) == VT_FUNC) {
 469         sym_type = STT_FUNC;
 470     } else if ((sym->type.t & VT_BTYPE) == VT_VOID) {
 471         sym_type = STT_NOTYPE;
 472     } else {
 473         sym_type = STT_OBJECT;
 474     }
 475
 476     if (sym->type.t & VT_STATIC)
 477         sym_bind = STB_LOCAL;
 478     else {
 479         if (sym->type.t & VT_WEAK)
 480             sym_bind = STB_WEAK;
 481         else
 482             sym_bind = STB_GLOBAL;
 483     }
 484
 485     if (!sym->c) {
 486         name = get_tok_str(sym->v, NULL);
 487 #ifdef CONFIG_TCC_BCHECK
 488         if (tcc_state->do_bounds_check) {
 489             char buf[32];
 490
 491             /* XXX: avoid doing that for statics ? */
 492             /* if bound checking is activated, we change some function
 493                names by adding the "__bound" prefix */
 494             switch(sym->v) {
 495 #ifdef TCC_TARGET_PE
 496             /* XXX: we rely only on malloc hooks */
 497             case TOK_malloc:
 498             case TOK_free:
 499             case TOK_realloc:
 500             case TOK_memalign:
 501             case TOK_calloc:
 502 #endif
 503             case TOK_memcpy:
 504             case TOK_memmove:
 505             case TOK_memset:
 506             case TOK_strlen:
 507             case TOK_strcpy:
 508             case TOK_alloca:
 509                 strcpy(buf, "__bound_");
 510                 strcat(buf, name);
 511                 name = buf;
 512                 break;
 513             }
 514         }
 515 #endif
 516         other = 0;
 517
 518 #ifdef TCC_TARGET_PE
 519         if (sym->type.t & VT_EXPORT)
 520             other |= 1;
 521         if (sym_type == STT_FUNC && sym->type.ref) {
 522             int attr = sym->type.ref->r;
 523             if (FUNC_EXPORT(attr))
 524                 other |= 1;
 525             if (FUNC_CALL(attr) == FUNC_STDCALL && can_add_underscore) {
 526                 sprintf(buf1, "_%s@%d", name, FUNC_ARGS(attr) * PTR_SIZE);
 527                 name = buf1;
 528                 other |= 2;
 529                 can_add_underscore = 0;
 530             }
 531         } else {
 532             if (find_elf_sym(tcc_state->dynsymtab_section, name))
 533                 other |= 4;
 534             if (sym->type.t & VT_IMPORT)
 535                 other |= 4;
 536         }
 537 #endif
 538         if (tcc_state->leading_underscore && can_add_underscore) {
 539             buf1[0] = '_';
 540             pstrcpy(buf1 + 1, sizeof(buf1) - 1, name);
 541             name = buf1;
 542         }
 543         if (sym->asm_label) {
 544             name = sym->asm_label;
 545         }
 546         info = ELFW(ST_INFO)(sym_bind, sym_type);
 547         sym->c = add_elf_sym(symtab_section, value, size, info, other, sh_num, name);
 548     } else {
 549         esym = &((ElfW(Sym) *)symtab_section->data)[sym->c];
 550         esym->st_value = value;
 551         esym->st_size = size;
 552         esym->st_shndx = sh_num;
 553     }
 554 }
 555
 556 ST_FUNC void put_extern_sym(Sym *sym, Section *section,
 557                            uplong value, unsigned long size)
 558 {
 559     put_extern_sym2(sym, section, value, size, 1);
 560 }
 561
 562 /* add a new relocation entry to symbol 'sym' in section 's' */
 563 ST_FUNC void greloc(Section *s, Sym *sym, unsigned long offset, int type)
 564 {
 565     int c = 0;
 566     if (sym) {
 567         if (0 == sym->c)
 568             put_extern_sym(sym, NULL, 0, 0);
 569         c = sym->c;
 570     }
 571     /* now we can add ELF relocation info */
 572     put_elf_reloc(symtab_section, s, offset, type, c);
 573 }
 574
 575 /********************************************************/
 576
 577 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 578 {
 579     int len;
 580     len = strlen(buf);
 581     vsnprintf(buf + len, buf_size - len, fmt, ap);
 582 }
 583
 584 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 585 {
 586     va_list ap;
 587     va_start(ap, fmt);
 588     strcat_vprintf(buf, buf_size, fmt, ap);
 589     va_end(ap);
 590 }
 591
 592 static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 593 {
 594     char buf[2048];
 595     BufferedFile **f;
 596
 597     buf[0] = '\0';
 598     if (file) {
 599         for(f = s1->include_stack; f < s1->include_stack_ptr; f++)
 600             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 601                           (*f)->filename, (*f)->line_num);
 602         if (file->line_num > 0) {
 603             strcat_printf(buf, sizeof(buf),
 604                           "%s:%d: ", file->filename, file->line_num);
 605         } else {
 606             strcat_printf(buf, sizeof(buf),
 607                           "%s: ", file->filename);
 608         }
 609     } else {
 610         strcat_printf(buf, sizeof(buf),
 611                       "tcc: ");
 612     }
 613     if (is_warning)
 614         strcat_printf(buf, sizeof(buf), "warning: ");
 615     else
 616         strcat_printf(buf, sizeof(buf), "error: ");
 617     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 618
 619     if (!s1->error_func) {
 620         /* default case: stderr */
 621         fprintf(stderr, "%s\n", buf);
 622     } else {
 623         s1->error_func(s1->error_opaque, buf);
 624     }
 625     if (!is_warning || s1->warn_error)
 626         s1->nb_errors++;
 627 }
 628
 629 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque,
 630                         void (*error_func)(void *opaque, const char *msg))
 631 {
 632     s->error_opaque = error_opaque;
 633     s->error_func = error_func;
 634 }
 635
 636 /* error without aborting current compilation */
 637 PUB_FUNC void tcc_error_noabort(const char *fmt, ...)
 638 {
 639     TCCState *s1 = tcc_state;
 640     va_list ap;
 641
 642     va_start(ap, fmt);
 643     error1(s1, 0, fmt, ap);
 644     va_end(ap);
 645 }
 646
 647 PUB_FUNC void tcc_error(const char *fmt, ...)
 648 {
 649     TCCState *s1 = tcc_state;
 650     va_list ap;
 651
 652     va_start(ap, fmt);
 653     error1(s1, 0, fmt, ap);
 654     va_end(ap);
 655     /* better than nothing: in some cases, we accept to handle errors */
 656     if (s1->error_set_jmp_enabled) {
 657         longjmp(s1->error_jmp_buf, 1);
 658     } else {
 659         /* XXX: eliminate this someday */
 660         exit(1);
 661     }
 662 }
 663
 664 PUB_FUNC void tcc_warning(const char *fmt, ...)
 665 {
 666     TCCState *s1 = tcc_state;
 667     va_list ap;
 668
 669     if (s1->warn_none)
 670         return;
 671
 672     va_start(ap, fmt);
 673     error1(s1, 1, fmt, ap);
 674     va_end(ap);
 675 }
 676
 677 /********************************************************/
 678 /* I/O layer */
 679
 680 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 681 {
 682     BufferedFile *bf;
 683     int buflen = initlen ? initlen : IO_BUF_SIZE;
 684
 685     bf = tcc_malloc(sizeof(BufferedFile) + buflen);
 686     bf->buf_ptr = bf->buffer;
 687     bf->buf_end = bf->buffer + initlen;
 688     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 689     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 690 #ifdef _WIN32
 691     normalize_slashes(bf->filename);
 692 #endif
 693     bf->line_num = 1;
 694     bf->ifndef_macro = 0;
 695     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 696     bf->fd = -1;
 697     bf->prev = file;
 698     file = bf;
 699 }
 700
 701 ST_FUNC void tcc_close(void)
 702 {
 703     BufferedFile *bf = file;
 704     if (bf->fd > 0) {
 705         close(bf->fd);
 706         total_lines += bf->line_num;
 707     }
 708     file = bf->prev;
 709     tcc_free(bf);
 710 }
 711
 712 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
 713 {
 714     int fd;
 715     if (strcmp(filename, "-") == 0)
 716         fd = 0, filename = "stdin";
 717     else
 718         fd = open(filename, O_RDONLY | O_BINARY);
 719     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 720         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 721                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 722     if (fd < 0)
 723         return -1;
 724
 725     tcc_open_bf(s1, filename, 0);
 726     file->fd = fd;
 727     return fd;
 728 }
 729
 730 /* compile the C file opened in 'file'. Return non zero if errors. */
 731 static int tcc_compile(TCCState *s1)
 732 {
 733     Sym *define_start;
 734     SValue *pvtop;
 735     char buf[512];
 736     volatile int section_sym;
 737
 738 #ifdef INC_DEBUG
 739     printf("%s: **** new file\n", file->filename);
 740 #endif
 741     preprocess_init(s1);
 742
 743     cur_text_section = NULL;
 744     funcname = "";
 745     anon_sym = SYM_FIRST_ANOM;
 746
 747     /* file info: full path + filename */
 748     section_sym = 0; /* avoid warning */
 749     if (s1->do_debug) {
 750         section_sym = put_elf_sym(symtab_section, 0, 0,
 751                                   ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
 752                                   text_section->sh_num, NULL);
 753         getcwd(buf, sizeof(buf));
 754 #ifdef _WIN32
 755         normalize_slashes(buf);
 756 #endif
 757         pstrcat(buf, sizeof(buf), "/");
 758         put_stabs_r(buf, N_SO, 0, 0,
 759                     text_section->data_offset, text_section, section_sym);
 760         put_stabs_r(file->filename, N_SO, 0, 0,
 761                     text_section->data_offset, text_section, section_sym);
 762     }
 763     /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
 764        symbols can be safely used */
 765     put_elf_sym(symtab_section, 0, 0,
 766                 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
 767                 SHN_ABS, file->filename);
 768
 769     /* define some often used types */
 770     int_type.t = VT_INT;
 771
 772     char_pointer_type.t = VT_BYTE;
 773     mk_pointer(&char_pointer_type);
 774
 775 #if PTR_SIZE == 4
 776     size_type.t = VT_INT;
 777 #else
 778     size_type.t = VT_LLONG;
 779 #endif
 780
 781     func_old_type.t = VT_FUNC;
 782     func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
 783
 784 #if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP)
 785     float_type.t = VT_FLOAT;
 786     double_type.t = VT_DOUBLE;
 787
 788     func_float_type.t = VT_FUNC;
 789     func_float_type.ref = sym_push(SYM_FIELD, &float_type, FUNC_CDECL, FUNC_OLD);
 790     func_double_type.t = VT_FUNC;
 791     func_double_type.ref = sym_push(SYM_FIELD, &double_type, FUNC_CDECL, FUNC_OLD);
 792 #endif
 793
 794 #if 0
 795     /* define 'void *alloca(unsigned int)' builtin function */
 796     {
 797         Sym *s1;
 798
 799         p = anon_sym++;
 800         sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
 801         s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
 802         s1->next = NULL;
 803         sym->next = s1;
 804         sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
 805     }
 806 #endif
 807
 808     define_start = define_stack;
 809     nocode_wanted = 1;
 810
 811     if (setjmp(s1->error_jmp_buf) == 0) {
 812         s1->nb_errors = 0;
 813         s1->error_set_jmp_enabled = 1;
 814
 815         ch = file->buf_ptr[0];
 816         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 817         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
 818         pvtop = vtop;
 819         next();
 820         decl(VT_CONST);
 821         if (tok != TOK_EOF)
 822             expect("declaration");
 823         if (pvtop != vtop)
 824             tcc_warning("internal compiler error: vstack leak? (%d)", vtop - pvtop);
 825
 826         /* end of translation unit info */
 827         if (s1->do_debug) {
 828             put_stabs_r(NULL, N_SO, 0, 0,
 829                         text_section->data_offset, text_section, section_sym);
 830         }
 831     }
 832
 833     s1->error_set_jmp_enabled = 0;
 834
 835     /* reset define stack, but leave -Dsymbols (may be incorrect if
 836        they are undefined) */
 837     free_defines(define_start);
 838
 839     gen_inline_functions();
 840
 841     sym_pop(&global_stack, NULL);
 842     sym_pop(&local_stack, NULL);
 843
 844     return s1->nb_errors != 0 ? -1 : 0;
 845 }
 846
 847 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 848 {
 849     int len, ret;
 850     len = strlen(str);
 851
 852     tcc_open_bf(s, "<string>", len);
 853     memcpy(file->buffer, str, len);
 854     ret = tcc_compile(s);
 855     tcc_close();
 856     return ret;
 857 }
 858
 859 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
 860 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 861 {
 862     int len1, len2;
 863     /* default value */
 864     if (!value)
 865         value = "1";
 866     len1 = strlen(sym);
 867     len2 = strlen(value);
 868
 869     /* init file structure */
 870     tcc_open_bf(s1, "<define>", len1 + len2 + 1);
 871     memcpy(file->buffer, sym, len1);
 872     file->buffer[len1] = ' ';
 873     memcpy(file->buffer + len1 + 1, value, len2);
 874
 875     /* parse with define parser */
 876     ch = file->buf_ptr[0];
 877     next_nomacro();
 878     parse_define();
 879
 880     tcc_close();
 881 }
 882
 883 /* undefine a preprocessor symbol */
 884 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 885 {
 886     TokenSym *ts;
 887     Sym *s;
 888     ts = tok_alloc(sym, strlen(sym));
 889     s = define_find(ts->tok);
 890     /* undefine symbol by putting an invalid name */
 891     if (s)
 892         define_undef(s);
 893 }
 894
 895 static void tcc_cleanup(void)
 896 {
 897     int i, n;
 898
 899     if (NULL == tcc_state)
 900         return;
 901     tcc_state = NULL;
 902
 903     /* free -D defines */
 904     free_defines(NULL);
 905
 906     /* free tokens */
 907     n = tok_ident - TOK_IDENT;
 908     for(i = 0; i < n; i++)
 909         tcc_free(table_ident[i]);
 910     tcc_free(table_ident);
 911
 912     /* free sym_pools */
 913     dynarray_reset(&sym_pools, &nb_sym_pools);
 914     /* string buffer */
 915     cstr_free(&tokcstr);
 916     /* reset symbol stack */
 917     sym_free_first = NULL;
 918     /* cleanup from error/setjmp */
 919     macro_ptr = NULL;
 920 }
 921
 922 LIBTCCAPI TCCState *tcc_new(void)
 923 {
 924     TCCState *s;
 925     char buffer[100];
 926     int a,b,c;
 927
 928     tcc_cleanup();
 929
 930     s = tcc_mallocz(sizeof(TCCState));
 931     if (!s)
 932         return NULL;
 933     tcc_state = s;
 934 #ifdef _WIN32
 935     tcc_set_lib_path_w32(s);
 936 #else
 937     tcc_set_lib_path(s, CONFIG_TCCDIR);
 938 #endif
 939     s->output_type = TCC_OUTPUT_MEMORY;
 940     preprocess_new();
 941     s->include_stack_ptr = s->include_stack;
 942
 943     /* we add dummy defines for some special macros to speed up tests
 944        and to have working defined() */
 945     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
 946     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
 947     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
 948     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
 949
 950     /* standard defines */
 951     tcc_define_symbol(s, "__STDC__", NULL);
 952     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 953 #if defined(TCC_TARGET_I386)
 954     tcc_define_symbol(s, "__i386__", NULL);
 955     tcc_define_symbol(s, "__i386", NULL);
 956     tcc_define_symbol(s, "i386", NULL);
 957 #endif
 958 #if defined(TCC_TARGET_X86_64)
 959     tcc_define_symbol(s, "__x86_64__", NULL);
 960 #endif
 961 #if defined(TCC_TARGET_ARM)
 962     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 963     tcc_define_symbol(s, "__arm_elf__", NULL);
 964     tcc_define_symbol(s, "__arm_elf", NULL);
 965     tcc_define_symbol(s, "arm_elf", NULL);
 966     tcc_define_symbol(s, "__arm__", NULL);
 967     tcc_define_symbol(s, "__arm", NULL);
 968     tcc_define_symbol(s, "arm", NULL);
 969     tcc_define_symbol(s, "__APCS_32__", NULL);
 970 #endif
 971 #ifdef TCC_TARGET_PE
 972     tcc_define_symbol(s, "_WIN32", NULL);
 973 #ifdef TCC_TARGET_X86_64
 974     tcc_define_symbol(s, "_WIN64", NULL);
 975 #endif
 976 #else
 977     tcc_define_symbol(s, "__unix__", NULL);
 978     tcc_define_symbol(s, "__unix", NULL);
 979     tcc_define_symbol(s, "unix", NULL);
 980 #if defined(__FreeBSD__)
 981 #define str(s) #s
 982     tcc_define_symbol(s, "__FreeBSD__", str( __FreeBSD__));
 983 #undef str
 984 #endif
 985 #if defined(__FreeBSD_kernel__)
 986     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
 987 #endif
 988 #if defined(__linux)
 989     tcc_define_symbol(s, "__linux__", NULL);
 990     tcc_define_symbol(s, "__linux", NULL);
 991 #endif
 992 #endif
 993     /* tiny C specific defines */
 994     sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
 995     sprintf(buffer, "%d", a*10000 + b*100 + c);
 996     tcc_define_symbol(s, "__TINYC__", buffer);
 997
 998     /* tiny C & gcc defines */
 999 #if defined TCC_TARGET_PE && defined TCC_TARGET_X86_64
1000     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
1001     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
1002 #else
1003     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
1004     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
1005 #endif
1006
1007 #ifdef TCC_TARGET_PE
1008     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
1009 #else
1010     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
1011 #endif
1012
1013     /* glibc defines */
1014     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)", "name proto __asm__ (#alias)");
1015     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)", "name proto __asm__ (#alias) __THROW");
1016
1017 #ifndef TCC_TARGET_PE
1018     /* default library paths */
1019     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
1020     /* paths for crt objects */
1021     tcc_split_path(s, (void ***)&s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
1022 #endif
1023
1024     /* no section zero */
1025     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
1026
1027     /* create standard sections */
1028     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
1029     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
1030     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
1031
1032     /* symbols are always generated for linking stage */
1033     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
1034                                 ".strtab",
1035                                 ".hashtab", SHF_PRIVATE);
1036     strtab_section = symtab_section->link;
1037     s->symtab = symtab_section;
1038
1039     /* private symbol table for dynamic symbols */
1040     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
1041                                       ".dynstrtab",
1042                                       ".dynhashtab", SHF_PRIVATE);
1043     s->alacarte_link = 1;
1044     s->nocommon = 1;
1045
1046 #ifdef CHAR_IS_UNSIGNED
1047     s->char_is_unsigned = 1;
1048 #endif
1049     /* enable this if you want symbols with leading underscore on windows: */
1050 #if defined(TCC_TARGET_PE) && 0
1051     s->leading_underscore = 1;
1052 #endif
1053     if (s->section_align == 0)
1054         s->section_align = ELF_PAGE_SIZE;
1055 #ifdef TCC_TARGET_I386
1056     s->seg_size = 32;
1057 #endif
1058     return s;
1059 }
1060
1061 LIBTCCAPI void tcc_delete(TCCState *s1)
1062 {
1063     int i;
1064
1065     tcc_cleanup();
1066
1067     /* free all sections */
1068     for(i = 1; i < s1->nb_sections; i++)
1069         free_section(s1->sections[i]);
1070     dynarray_reset(&s1->sections, &s1->nb_sections);
1071
1072     for(i = 0; i < s1->nb_priv_sections; i++)
1073         free_section(s1->priv_sections[i]);
1074     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1075
1076     /* free any loaded DLLs */
1077     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1078         DLLReference *ref = s1->loaded_dlls[i];
1079         if ( ref->handle )
1080             dlclose(ref->handle);
1081     }
1082
1083     /* free loaded dlls array */
1084     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1085
1086     /* free library paths */
1087     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1088     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
1089
1090     /* free include paths */
1091     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1092     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1093     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1094
1095     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
1096
1097     tcc_free(s1->tcc_lib_path);
1098
1099 #ifdef HAVE_SELINUX
1100     munmap (s1->write_mem, s1->mem_size);
1101     munmap (s1->runtime_mem, s1->mem_size);
1102 #else
1103     tcc_free(s1->runtime_mem);
1104 #endif
1105     tcc_free(s1);
1106 }
1107
1108 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
1109 {
1110     tcc_split_path(s, (void ***)&s->include_paths, &s->nb_include_paths, pathname);
1111     return 0;
1112 }
1113
1114 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
1115 {
1116     tcc_split_path(s, (void ***)&s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
1117     return 0;
1118 }
1119
1120 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1121 {
1122     const char *ext;
1123     ElfW(Ehdr) ehdr;
1124     int fd, ret, size;
1125
1126     /* find source file type with extension */
1127     ext = tcc_fileextension(filename);
1128     if (ext[0])
1129         ext++;
1130
1131 #ifdef CONFIG_TCC_ASM
1132     /* if .S file, define __ASSEMBLER__ like gcc does */
1133     if (!strcmp(ext, "S"))
1134         tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
1135 #endif
1136
1137     /* open the file */
1138     ret = tcc_open(s1, filename);
1139     if (ret < 0) {
1140         if (flags & AFF_PRINT_ERROR)
1141             tcc_error_noabort("file '%s' not found", filename);
1142         return ret;
1143     }
1144
1145     /* update target deps */
1146     dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1147             tcc_strdup(filename));
1148
1149     if (flags & AFF_PREPROCESS) {
1150         ret = tcc_preprocess(s1);
1151         goto the_end;
1152     }
1153
1154     if (!ext[0] || !PATHCMP(ext, "c")) {
1155         /* C file assumed */
1156         ret = tcc_compile(s1);
1157         goto the_end;
1158     }
1159
1160 #ifdef CONFIG_TCC_ASM
1161     if (!strcmp(ext, "S")) {
1162         /* preprocessed assembler */
1163         ret = tcc_assemble(s1, 1);
1164         goto the_end;
1165     }
1166
1167     if (!strcmp(ext, "s")) {
1168         /* non preprocessed assembler */
1169         ret = tcc_assemble(s1, 0);
1170         goto the_end;
1171     }
1172 #endif
1173
1174     fd = file->fd;
1175     /* assume executable format: auto guess file type */
1176     size = read(fd, &ehdr, sizeof(ehdr));
1177     lseek(fd, 0, SEEK_SET);
1178     if (size <= 0) {
1179         tcc_error_noabort("could not read header");
1180         goto the_end;
1181     }
1182
1183     if (size == sizeof(ehdr) &&
1184         ehdr.e_ident[0] == ELFMAG0 &&
1185         ehdr.e_ident[1] == ELFMAG1 &&
1186         ehdr.e_ident[2] == ELFMAG2 &&
1187         ehdr.e_ident[3] == ELFMAG3) {
1188
1189         /* do not display line number if error */
1190         file->line_num = 0;
1191         if (ehdr.e_type == ET_REL) {
1192             ret = tcc_load_object_file(s1, fd, 0);
1193             goto the_end;
1194
1195         }
1196 #ifndef TCC_TARGET_PE
1197         if (ehdr.e_type == ET_DYN) {
1198             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1199                 void *h;
1200                 h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1201                 if (h)
1202                     ret = 0;
1203             } else {
1204                 ret = tcc_load_dll(s1, fd, filename,
1205                                    (flags & AFF_REFERENCED_DLL) != 0);
1206             }
1207             goto the_end;
1208         }
1209 #endif
1210         tcc_error_noabort("unrecognized ELF file");
1211         goto the_end;
1212     }
1213
1214     if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
1215         file->line_num = 0; /* do not display line number if error */
1216         ret = tcc_load_archive(s1, fd);
1217         goto the_end;
1218     }
1219
1220 #ifdef TCC_TARGET_COFF
1221     if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
1222         ret = tcc_load_coff(s1, fd);
1223         goto the_end;
1224     }
1225 #endif
1226
1227 #ifdef TCC_TARGET_PE
1228     ret = pe_load_file(s1, filename, fd);
1229 #else
1230     /* as GNU ld, consider it is an ld script if not recognized */
1231     ret = tcc_load_ldscript(s1);
1232 #endif
1233     if (ret < 0)
1234         tcc_error_noabort("unrecognized file type");
1235
1236 the_end:
1237     tcc_close();
1238     return ret;
1239 }
1240
1241 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1242 {
1243     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1244         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS);
1245     else
1246         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR);
1247 }
1248
1249 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1250 {
1251     tcc_split_path(s, (void ***)&s->library_paths, &s->nb_library_paths, pathname);
1252     return 0;
1253 }
1254
1255 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1256     const char *filename, int flags, char **paths, int nb_paths)
1257 {
1258     char buf[1024];
1259     int i;
1260
1261     for(i = 0; i < nb_paths; i++) {
1262         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1263         if (tcc_add_file_internal(s, buf, flags) == 0)
1264             return 0;
1265     }
1266     return -1;
1267 }
1268
1269 #ifndef TCC_TARGET_PE
1270 /* find and load a dll. Return non zero if not found */
1271 /* XXX: add '-rpath' option support ? */
1272 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1273 {
1274     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1275         s->library_paths, s->nb_library_paths);
1276 }
1277 #endif
1278
1279 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename)
1280 {
1281     if (-1 == tcc_add_library_internal(s, "%s/%s",
1282         filename, 0, s->crt_paths, s->nb_crt_paths))
1283         tcc_error_noabort("file '%s' not found", filename);
1284     return 0;
1285 }
1286
1287 /* the library name is the same as the argument of the '-l' option */
1288 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1289 {
1290 #ifdef TCC_TARGET_PE
1291     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1292     const char **pp = s->static_link ? libs + 4 : libs;
1293 #else
1294     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1295     const char **pp = s->static_link ? libs + 1 : libs;
1296 #endif
1297     while (*pp) {
1298         if (0 == tcc_add_library_internal(s, *pp,
1299             libraryname, 0, s->library_paths, s->nb_library_paths))
1300             return 0;
1301         ++pp;
1302     }
1303     return -1;
1304 }
1305
1306 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1307 {
1308 #ifdef TCC_TARGET_PE
1309     pe_putimport(s, 0, name, val);
1310 #else
1311     add_elf_sym(symtab_section, (uplong)val, 0,
1312                 ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1313                 SHN_ABS, name);
1314 #endif
1315     return 0;
1316 }
1317
1318 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
1319 {
1320     s->output_type = output_type;
1321
1322     if (!s->nostdinc) {
1323         /* default include paths */
1324         /* -isystem paths have already been handled */
1325         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
1326     }
1327
1328     /* if bound checking, then add corresponding sections */
1329 #ifdef CONFIG_TCC_BCHECK
1330     if (s->do_bounds_check) {
1331         /* define symbol */
1332         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1333         /* create bounds sections */
1334         bounds_section = new_section(s, ".bounds",
1335                                      SHT_PROGBITS, SHF_ALLOC);
1336         lbounds_section = new_section(s, ".lbounds",
1337                                       SHT_PROGBITS, SHF_ALLOC);
1338     }
1339 #endif
1340
1341     if (s->char_is_unsigned) {
1342         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
1343     }
1344
1345     /* add debug sections */
1346     if (s->do_debug) {
1347         /* stab symbols */
1348         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
1349         stab_section->sh_entsize = sizeof(Stab_Sym);
1350         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
1351         put_elf_str(stabstr_section, "");
1352         stab_section->link = stabstr_section;
1353         /* put first entry */
1354         put_stabs("", 0, 0, 0, 0);
1355     }
1356
1357 #ifdef TCC_TARGET_PE
1358     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
1359 # ifdef _WIN32
1360     tcc_add_systemdir(s);
1361 # endif
1362 #else
1363     /* add libc crt1/crti objects */
1364     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1365         !s->nostdlib) {
1366         if (output_type != TCC_OUTPUT_DLL)
1367             tcc_add_crt(s, "crt1.o");
1368         tcc_add_crt(s, "crti.o");
1369     }
1370 #endif
1371     return 0;
1372 }
1373
1374 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1375 #define FD_INVERT 0x0002 /* invert value before storing */
1376
1377 typedef struct FlagDef {
1378     uint16_t offset;
1379     uint16_t flags;
1380     const char *name;
1381 } FlagDef;
1382
1383 static const FlagDef warning_defs[] = {
1384     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1385     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1386     { offsetof(TCCState, warn_error), 0, "error" },
1387     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1388       "implicit-function-declaration" },
1389 };
1390
1391 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1392                     const char *name, int value)
1393 {
1394     int i;
1395     const FlagDef *p;
1396     const char *r;
1397
1398     r = name;
1399     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
1400         r += 3;
1401         value = !value;
1402     }
1403     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1404         if (!strcmp(r, p->name))
1405             goto found;
1406     }
1407     return -1;
1408  found:
1409     if (p->flags & FD_INVERT)
1410         value = !value;
1411     *(int *)((uint8_t *)s + p->offset) = value;
1412     return 0;
1413 }
1414
1415 /* enable debug */
1416 LIBTCCAPI void tcc_enable_debug(TCCState *s)
1417 {
1418     s->do_debug = 1;
1419 }
1420
1421 /* set/reset a warning */
1422 LIBTCCAPI int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1423 {
1424     int i;
1425     const FlagDef *p;
1426
1427     if (!strcmp(warning_name, "all")) {
1428         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1429             if (p->flags & WD_ALL)
1430                 *(int *)((uint8_t *)s + p->offset) = 1;
1431         }
1432         return 0;
1433     } else {
1434         return set_flag(s, warning_defs, countof(warning_defs),
1435                         warning_name, value);
1436     }
1437 }
1438
1439 static const FlagDef flag_defs[] = {
1440     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1441     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1442     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1443     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1444 };
1445
1446 /* set/reset a flag */
1447 PUB_FUNC int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1448 {
1449     return set_flag(s, flag_defs, countof(flag_defs),
1450                     flag_name, value);
1451 }
1452
1453
1454 static int strstart(const char *str, const char *val, char **ptr)
1455 {
1456     const char *p, *q;
1457     p = str;
1458     q = val;
1459     while (*q != '\0') {
1460         if (*p != *q)
1461             return 0;
1462         p++;
1463         q++;
1464     }
1465     if (ptr)
1466         *ptr = (char *) p;
1467     return 1;
1468 }
1469
1470
1471 /* Like strstart, but automatically takes into account that ld options can
1472  *
1473  * - start with double or single dash (e.g. '--soname' or '-soname')
1474  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1475  *   or '-Wl,-soname=x.so')
1476  *
1477  * you provide `val` always in 'option[=]' form (no leading -)
1478  */
1479 static int link_option(const char *str, const char *val, char **ptr)
1480 {
1481     const char *p, *q;
1482
1483     /* there should be 1 or 2 dashes */
1484     if (*str++ != '-')
1485         return 0;
1486     if (*str == '-')
1487         str++;
1488
1489     /* then str & val should match (potentialy up to '=') */
1490     p = str;
1491     q = val;
1492
1493     while (*q != '\0' && *q != '=') {
1494         if (*p != *q)
1495             return 0;
1496         p++;
1497         q++;
1498     }
1499
1500     /* '=' near eos means ',' or '=' is ok */
1501     if (*q == '=') {
1502         if (*p != ',' && *p != '=')
1503             return 0;
1504         p++;
1505         q++;
1506     }
1507
1508     if (ptr)
1509         *ptr = (char *) p;
1510     return 1;
1511 }
1512
1513
1514 /* set linker options */
1515 PUB_FUNC const char * tcc_set_linker(TCCState *s, char *option, int multi)
1516 {
1517     char *p = option;
1518     char *end;
1519
1520     while (option && *option) {
1521         end = NULL;
1522         if (link_option(option, "Bsymbolic", &p)) {
1523             s->symbolic = TRUE;
1524         } else if (link_option(option, "nostdlib", &p)) {
1525             s->nostdlib = TRUE;
1526         } else if (link_option(option, "fini=", &p)) {
1527             s->fini_symbol = p;
1528             if (s->warn_unsupported)
1529                 tcc_warning("ignoring -fini %s", p);
1530         } else if (link_option(option, "image-base=", &p)) {
1531             s->text_addr = strtoull(p, &end, 16);
1532             s->has_text_addr = 1;
1533         } else if (link_option(option, "init=", &p)) {
1534             s->init_symbol = p;
1535             if (s->warn_unsupported)
1536                 tcc_warning("ignoring -init %s", p);
1537         } else if (link_option(option, "oformat=", &p)) {
1538 #if defined(TCC_TARGET_PE)
1539             if (strstart(p, "pe-", NULL)) {
1540 #else
1541 #if defined(TCC_TARGET_X86_64)
1542             if (strstart(p, "elf64-", NULL)) {
1543 #else
1544             if (strstart(p, "elf32-", NULL)) {
1545 #endif
1546 #endif
1547                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1548             } else if (!strcmp(p, "binary")) {
1549                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1550             } else
1551 #ifdef TCC_TARGET_COFF
1552             if (!strcmp(p, "coff")) {
1553                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1554             } else
1555 #endif
1556             {
1557                 return p;
1558             }
1559
1560         } else if (link_option(option, "rpath=", &p)) {
1561             s->rpath = p;
1562         } else if (link_option(option, "section-alignment=", &p)) {
1563             s->section_align = strtoul(p, &end, 16);
1564         } else if (link_option(option, "soname=", &p)) {
1565             s->soname = p;
1566             multi = 0;
1567 #ifdef TCC_TARGET_PE
1568         } else if (link_option(option, "file-alignment=", &p)) {
1569             s->pe_file_align = strtoul(p, &end, 16);
1570         } else if (link_option(option, "stack=", &p)) {
1571             s->pe_stack_size = strtoul(p, &end, 10);
1572         } else if (link_option(option, "subsystem=", &p)) {
1573 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1574             if (!strcmp(p, "native")) {
1575                 s->pe_subsystem = 1;
1576             } else if (!strcmp(p, "console")) {
1577                 s->pe_subsystem = 3;
1578             } else if (!strcmp(p, "gui")) {
1579                 s->pe_subsystem = 2;
1580             } else if (!strcmp(p, "posix")) {
1581                 s->pe_subsystem = 7;
1582             } else if (!strcmp(p, "efiapp")) {
1583                 s->pe_subsystem = 10;
1584             } else if (!strcmp(p, "efiboot")) {
1585                 s->pe_subsystem = 11;
1586             } else if (!strcmp(p, "efiruntime")) {
1587                 s->pe_subsystem = 12;
1588             } else if (!strcmp(p, "efirom")) {
1589                 s->pe_subsystem = 13;
1590 #elif defined(TCC_TARGET_ARM)
1591             if (!strcmp(p, "wince")) {
1592                 s->pe_subsystem = 9;
1593 #endif
1594             } else {
1595                 return p;
1596             }
1597 #endif
1598
1599         } else if (link_option(option, "Ttext=", &p)) {
1600             s->text_addr = strtoull(p, &end, 16);
1601             s->has_text_addr = 1;
1602         } else {
1603             char *comma_ptr = strchr(option, ',');
1604             if (comma_ptr)
1605                 *comma_ptr = '\0';
1606             return option;
1607         }
1608
1609         if (multi) {
1610             option = NULL;
1611             p = strchr( (end) ? end : p, ',');
1612             if (p) {
1613                 *p = 0;    /* terminate last option */
1614                 option = ++p;
1615             }
1616         } else
1617             option = NULL;
1618     }
1619     return NULL;
1620 }
1621
1622 PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time)
1623 {
1624     double tt;
1625     tt = (double)total_time / 1000000.0;
1626     if (tt < 0.001)
1627         tt = 0.001;
1628     if (total_bytes < 1)
1629         total_bytes = 1;
1630     printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
1631            tok_ident - TOK_IDENT, total_lines, total_bytes,
1632            tt, (int)(total_lines / tt),
1633            total_bytes / tt / 1000000.0);
1634 }
1635
1636 /* set CONFIG_TCCDIR at runtime */
1637 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1638 {
1639     tcc_free(s->tcc_lib_path);
1640     s->tcc_lib_path = tcc_strdup(path);
1641 }
1642
1643 PUB_FUNC char *tcc_default_target(TCCState *s, const char *default_file)
1644 {
1645     char buf[1024];
1646     char *ext;
1647     const char *name = "a";
1648
1649     if (default_file && strcmp(default_file, "-"))
1650         name = tcc_basename(default_file);
1651     pstrcpy(buf, sizeof(buf), name);
1652     ext = tcc_fileextension(buf);
1653 #ifdef TCC_TARGET_PE
1654     if (s->output_type == TCC_OUTPUT_DLL)
1655         strcpy(ext, ".dll");
1656     else
1657     if (s->output_type == TCC_OUTPUT_EXE)
1658         strcpy(ext, ".exe");
1659     else
1660 #endif
1661     if (( (s->output_type == TCC_OUTPUT_OBJ && !s->reloc_output) ||
1662           (s->output_type == TCC_OUTPUT_PREPROCESS) )
1663         && *ext)
1664         strcpy(ext, ".o");
1665     else
1666         pstrcpy(buf, sizeof(buf), "a.out");
1667
1668     return tcc_strdup(buf);
1669 }
1670
1671
1672 PUB_FUNC void tcc_gen_makedeps(TCCState *s, const char *target, const char *filename)
1673 {
1674     FILE *depout;
1675     char buf[1024], *ext;
1676     int i;
1677
1678     if (!filename) {
1679         /* compute filename automatically
1680          * dir/file.o -> dir/file.d             */
1681         pstrcpy(buf, sizeof(buf), target);
1682         ext = tcc_fileextension(buf);
1683         pstrcpy(ext, sizeof(buf) - (ext-buf), ".d");
1684         filename = buf;
1685     }
1686
1687     if (s->verbose)
1688         printf("<- %s\n", filename);
1689
1690     /* XXX return err codes instead of error() ? */
1691     depout = fopen(filename, "w");
1692     if (!depout)
1693         tcc_error("could not open '%s'", filename);
1694
1695     fprintf(depout, "%s : \\\n", target);
1696     for (i=0; i<s->nb_target_deps; ++i)
1697         fprintf(depout, " %s \\\n", s->target_deps[i]);
1698     fprintf(depout, "\n");
1699     fclose(depout);
1700 }