libtcc.c

   1 /*
   2  *  TCC - Tiny C Compiler
   3  *
   4  *  Copyright (c) 2001-2004 Fabrice Bellard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "tcc.h"
  22
  23 /********************************************************/
  24 /* global variables */
  25
  26 /* use GNU C extensions */
  27 ST_DATA int gnu_ext = 1;
  28
  29 /* use TinyCC extensions */
  30 ST_DATA int tcc_ext = 1;
  31
  32 /* XXX: get rid of this ASAP */
  33 ST_DATA struct TCCState *tcc_state;
  34
  35 /********************************************************/
  36
  37 #ifdef ONE_SOURCE
  38 #include "tccpp.c"
  39 #include "tccgen.c"
  40 #include "tccelf.c"
  41 #include "tccrun.c"
  42 #ifdef TCC_TARGET_I386
  43 #include "i386-gen.c"
  44 #endif
  45 #ifdef TCC_TARGET_ARM
  46 #include "arm-gen.c"
  47 #endif
  48 #ifdef TCC_TARGET_C67
  49 #include "c67-gen.c"
  50 #endif
  51 #ifdef TCC_TARGET_X86_64
  52 #include "x86_64-gen.c"
  53 #endif
  54 #ifdef CONFIG_TCC_ASM
  55 #include "tccasm.c"
  56 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
  57 #include "i386-asm.c"
  58 #endif
  59 #endif
  60 #ifdef TCC_TARGET_COFF
  61 #include "tcccoff.c"
  62 #endif
  63 #ifdef TCC_TARGET_PE
  64 #include "tccpe.c"
  65 #endif
  66 #endif /* ONE_SOURCE */
  67
  68 /********************************************************/
  69 #ifndef CONFIG_TCC_ASM
  70 ST_FUNC void asm_instr(void)
  71 {
  72     tcc_error("inline asm() not supported");
  73 }
  74 ST_FUNC void asm_global_instr(void)
  75 {
  76     tcc_error("inline asm() not supported");
  77 }
  78 #endif
  79
  80 /********************************************************/
  81
  82 #ifdef _WIN32
  83 static char *normalize_slashes(char *path)
  84 {
  85     char *p;
  86     for (p = path; *p; ++p)
  87         if (*p == '\\')
  88             *p = '/';
  89     return path;
  90 }
  91
  92 static HMODULE tcc_module;
  93
  94 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
  95 static void tcc_set_lib_path_w32(TCCState *s)
  96 {
  97     char path[1024], *p;
  98     GetModuleFileNameA(tcc_module, path, sizeof path);
  99     p = tcc_basename(normalize_slashes(strlwr(path)));
 100     if (p - 5 > path && 0 == strncmp(p - 5, "/bin/", 5))
 101         p -= 5;
 102     else if (p > path)
 103         p--;
 104     *p = 0;
 105     tcc_set_lib_path(s, path);
 106 }
 107
 108 static void tcc_add_systemdir(TCCState *s)
 109 {
 110     char buf[1000];
 111     GetSystemDirectory(buf, sizeof buf);
 112     tcc_add_library_path(s, normalize_slashes(buf));
 113 }
 114
 115 #ifndef CONFIG_TCC_STATIC
 116 void dlclose(void *p)
 117 {
 118     FreeLibrary((HMODULE)p);
 119 }
 120 #endif
 121
 122 #ifdef LIBTCC_AS_DLL
 123 BOOL WINAPI DllMain (HANDLE hDll, DWORD dwReason, LPVOID lpReserved)
 124 {
 125     if (DLL_PROCESS_ATTACH == dwReason)
 126         tcc_module = hDll;
 127     return TRUE;
 128 }
 129 #endif
 130 #endif
 131
 132 /********************************************************/
 133 /* copy a string and truncate it. */
 134 PUB_FUNC char *pstrcpy(char *buf, int buf_size, const char *s)
 135 {
 136     char *q, *q_end;
 137     int c;
 138
 139     if (buf_size > 0) {
 140         q = buf;
 141         q_end = buf + buf_size - 1;
 142         while (q < q_end) {
 143             c = *s++;
 144             if (c == '\0')
 145                 break;
 146             *q++ = c;
 147         }
 148         *q = '\0';
 149     }
 150     return buf;
 151 }
 152
 153 /* strcat and truncate. */
 154 PUB_FUNC char *pstrcat(char *buf, int buf_size, const char *s)
 155 {
 156     int len;
 157     len = strlen(buf);
 158     if (len < buf_size)
 159         pstrcpy(buf + len, buf_size - len, s);
 160     return buf;
 161 }
 162
 163 PUB_FUNC char *pstrncpy(char *out, const char *in, size_t num)
 164 {
 165     memcpy(out, in, num);
 166     out[num] = '\0';
 167     return out;
 168 }
 169
 170 /* extract the basename of a file */
 171 PUB_FUNC char *tcc_basename(const char *name)
 172 {
 173     char *p = strchr(name, 0);
 174     while (p > name && !IS_DIRSEP(p[-1]))
 175         --p;
 176     return p;
 177 }
 178
 179 /* extract extension part of a file
 180  *
 181  * (if no extension, return pointer to end-of-string)
 182  */
 183 PUB_FUNC char *tcc_fileextension (const char *name)
 184 {
 185     char *b = tcc_basename(name);
 186     char *e = strrchr(b, '.');
 187     return e ? e : strchr(b, 0);
 188 }
 189
 190 /********************************************************/
 191 /* memory management */
 192
 193 #undef free
 194 #undef malloc
 195 #undef realloc
 196
 197 #ifdef MEM_DEBUG
 198 int mem_cur_size;
 199 int mem_max_size;
 200 unsigned malloc_usable_size(void*);
 201 #endif
 202
 203 PUB_FUNC void tcc_free(void *ptr)
 204 {
 205 #ifdef MEM_DEBUG
 206     mem_cur_size -= malloc_usable_size(ptr);
 207 #endif
 208     free(ptr);
 209 }
 210
 211 PUB_FUNC void *tcc_malloc(unsigned long size)
 212 {
 213     void *ptr;
 214     ptr = malloc(size);
 215     if (!ptr && size)
 216         tcc_error("memory full");
 217 #ifdef MEM_DEBUG
 218     mem_cur_size += malloc_usable_size(ptr);
 219     if (mem_cur_size > mem_max_size)
 220         mem_max_size = mem_cur_size;
 221 #endif
 222     return ptr;
 223 }
 224
 225 PUB_FUNC void *tcc_mallocz(unsigned long size)
 226 {
 227     void *ptr;
 228     ptr = tcc_malloc(size);
 229     memset(ptr, 0, size);
 230     return ptr;
 231 }
 232
 233 PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
 234 {
 235     void *ptr1;
 236 #ifdef MEM_DEBUG
 237     mem_cur_size -= malloc_usable_size(ptr);
 238 #endif
 239     ptr1 = realloc(ptr, size);
 240     if (!ptr1 && size)
 241         tcc_error("memory full");
 242 #ifdef MEM_DEBUG
 243     /* NOTE: count not correct if alloc error, but not critical */
 244     mem_cur_size += malloc_usable_size(ptr1);
 245     if (mem_cur_size > mem_max_size)
 246         mem_max_size = mem_cur_size;
 247 #endif
 248     return ptr1;
 249 }
 250
 251 PUB_FUNC char *tcc_strdup(const char *str)
 252 {
 253     char *ptr;
 254     ptr = tcc_malloc(strlen(str) + 1);
 255     strcpy(ptr, str);
 256     return ptr;
 257 }
 258
 259 PUB_FUNC void tcc_memstats(void)
 260 {
 261 #ifdef MEM_DEBUG
 262     printf("memory in use: %d\n", mem_cur_size);
 263 #endif
 264 }
 265
 266 #define free(p) use_tcc_free(p)
 267 #define malloc(s) use_tcc_malloc(s)
 268 #define realloc(p, s) use_tcc_realloc(p, s)
 269
 270 /********************************************************/
 271 /* virtual io */
 272
 273 LIBTCCAPI void tcc_set_vio_module(TCCState *s, vio_module_t *vio_module){
 274         s->vio_module = vio_module;
 275         vio_module->tcc_state = s;
 276 }
 277
 278 void vio_initialize(vio_fd *fd) {
 279     fd->fd = -1;
 280     fd->vio_udata = NULL;
 281     fd->vio_module = NULL;
 282 }
 283
 284 int vio_open(struct TCCState *s, vio_fd *fd, const char *fn, int oflag) {
 285     int rc;
 286     vio_initialize(fd);
 287     fd->vio_module = s->vio_module;
 288     if(s->vio_module && (s->vio_module->call_vio_open_flags & CALL_VIO_OPEN_FIRST)) {
 289         rc =  s->vio_module->vio_open(fd, fn, oflag);
 290         if(rc >= 0) return rc;
 291     }
 292
 293     fd->fd = open(fn, oflag);
 294
 295     if(fd->fd < 0 && s->vio_module && (s->vio_module->call_vio_open_flags & CALL_VIO_OPEN_LAST)) {
 296         rc =  s->vio_module->vio_open(fd, fn, oflag);
 297         if(rc >= 0) return rc;
 298     }
 299     //printf("vio_open = %d %s\n", fd->fd, fn);
 300     return fd->fd;
 301 }
 302
 303 off_t vio_lseek(vio_fd fd, off_t offset, int whence) {
 304     if(fd.vio_udata) {
 305         return fd.vio_module->vio_lseek(fd, offset, whence);
 306     }
 307     return lseek(fd.fd, offset, whence);
 308 }
 309
 310 size_t vio_read(vio_fd fd, void *buf, size_t bytes) {
 311     if(fd.vio_udata) {
 312         return fd.vio_module->vio_read(fd, buf, bytes);
 313     }
 314     return read(fd.fd, buf, bytes);
 315 }
 316
 317 int vio_close(vio_fd *fd) {
 318     int rc = 0;
 319     if(fd->vio_udata){
 320         fd->vio_module->vio_close(fd);
 321     } else rc = close(fd->fd);
 322     vio_initialize(fd);
 323     return rc;
 324 }
 325
 326 /********************************************************/
 327 /* dynarrays */
 328
 329 PUB_FUNC void dynarray_add(void ***ptab, int *nb_ptr, void *data)
 330 {
 331     int nb, nb_alloc;
 332     void **pp;
 333
 334     nb = *nb_ptr;
 335     pp = *ptab;
 336     /* every power of two we double array size */
 337     if ((nb & (nb - 1)) == 0) {
 338         if (!nb)
 339             nb_alloc = 1;
 340         else
 341             nb_alloc = nb * 2;
 342         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 343         *ptab = pp;
 344     }
 345     pp[nb++] = data;
 346     *nb_ptr = nb;
 347 }
 348
 349 PUB_FUNC void dynarray_reset(void *pp, int *n)
 350 {
 351     void **p;
 352     for (p = *(void***)pp; *n; ++p, --*n)
 353         if (*p)
 354             tcc_free(*p);
 355     tcc_free(*(void**)pp);
 356     *(void**)pp = NULL;
 357 }
 358
 359 static void tcc_split_path(TCCState *s, void ***p_ary, int *p_nb_ary, const char *in)
 360 {
 361     const char *p;
 362     do {
 363         int c;
 364         CString str;
 365
 366         cstr_new(&str);
 367         for (p = in; c = *p, c != '\0' && c != PATHSEP; ++p) {
 368             if (c == '{' && p[1] && p[2] == '}') {
 369                 c = p[1], p += 2;
 370                 if (c == 'B')
 371                     cstr_cat(&str, s->tcc_lib_path);
 372             } else {
 373                 cstr_ccat(&str, c);
 374             }
 375         }
 376         cstr_ccat(&str, '\0');
 377         dynarray_add(p_ary, p_nb_ary, str.data);
 378         in = p+1;
 379     } while (*p);
 380 }
 381
 382 /********************************************************/
 383
 384 ST_FUNC Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags)
 385 {
 386     Section *sec;
 387
 388     sec = tcc_mallocz(sizeof(Section) + strlen(name));
 389     strcpy(sec->name, name);
 390     sec->sh_type = sh_type;
 391     sec->sh_flags = sh_flags;
 392     switch(sh_type) {
 393     case SHT_HASH:
 394     case SHT_REL:
 395     case SHT_RELA:
 396     case SHT_DYNSYM:
 397     case SHT_SYMTAB:
 398     case SHT_DYNAMIC:
 399         sec->sh_addralign = 4;
 400         break;
 401     case SHT_STRTAB:
 402         sec->sh_addralign = 1;
 403         break;
 404     default:
 405         sec->sh_addralign = 32; /* default conservative alignment */
 406         break;
 407     }
 408
 409     if (sh_flags & SHF_PRIVATE) {
 410         dynarray_add((void ***)&s1->priv_sections, &s1->nb_priv_sections, sec);
 411     } else {
 412         sec->sh_num = s1->nb_sections;
 413         dynarray_add((void ***)&s1->sections, &s1->nb_sections, sec);
 414     }
 415
 416     return sec;
 417 }
 418
 419 static void free_section(Section *s)
 420 {
 421     tcc_free(s->data);
 422 }
 423
 424 /* realloc section and set its content to zero */
 425 ST_FUNC void section_realloc(Section *sec, unsigned long new_size)
 426 {
 427     unsigned long size;
 428     unsigned char *data;
 429
 430     size = sec->data_allocated;
 431     if (size == 0)
 432         size = 1;
 433     while (size < new_size)
 434         size = size * 2;
 435     data = tcc_realloc(sec->data, size);
 436     memset(data + sec->data_allocated, 0, size - sec->data_allocated);
 437     sec->data = data;
 438     sec->data_allocated = size;
 439 }
 440
 441 /* reserve at least 'size' bytes in section 'sec' from
 442    sec->data_offset. */
 443 ST_FUNC void *section_ptr_add(Section *sec, unsigned long size)
 444 {
 445     unsigned long offset, offset1;
 446
 447     offset = sec->data_offset;
 448     offset1 = offset + size;
 449     if (offset1 > sec->data_allocated)
 450         section_realloc(sec, offset1);
 451     sec->data_offset = offset1;
 452     return sec->data + offset;
 453 }
 454
 455 /* reserve at least 'size' bytes from section start */
 456 ST_FUNC void section_reserve(Section *sec, unsigned long size)
 457 {
 458     if (size > sec->data_allocated)
 459         section_realloc(sec, size);
 460     if (size > sec->data_offset)
 461         sec->data_offset = size;
 462 }
 463
 464 /* return a reference to a section, and create it if it does not
 465    exists */
 466 ST_FUNC Section *find_section(TCCState *s1, const char *name)
 467 {
 468     Section *sec;
 469     int i;
 470     for(i = 1; i < s1->nb_sections; i++) {
 471         sec = s1->sections[i];
 472         if (!strcmp(name, sec->name))
 473             return sec;
 474     }
 475     /* sections are created as PROGBITS */
 476     return new_section(s1, name, SHT_PROGBITS, SHF_ALLOC);
 477 }
 478
 479 /* update sym->c so that it points to an external symbol in section
 480    'section' with value 'value' */
 481 ST_FUNC void put_extern_sym2(Sym *sym, Section *section,
 482                             uplong value, unsigned long size,
 483                             int can_add_underscore)
 484 {
 485     int sym_type, sym_bind, sh_num, info, other;
 486     ElfW(Sym) *esym;
 487     const char *name;
 488     char buf1[256];
 489
 490     if (section == NULL)
 491         sh_num = SHN_UNDEF;
 492     else if (section == SECTION_ABS)
 493         sh_num = SHN_ABS;
 494     else
 495         sh_num = section->sh_num;
 496
 497     if ((sym->type.t & VT_BTYPE) == VT_FUNC) {
 498         sym_type = STT_FUNC;
 499     } else if ((sym->type.t & VT_BTYPE) == VT_VOID) {
 500         sym_type = STT_NOTYPE;
 501     } else {
 502         sym_type = STT_OBJECT;
 503     }
 504
 505     if (sym->type.t & VT_STATIC)
 506         sym_bind = STB_LOCAL;
 507     else {
 508         if (sym->type.t & VT_WEAK)
 509             sym_bind = STB_WEAK;
 510         else
 511             sym_bind = STB_GLOBAL;
 512     }
 513
 514     if (!sym->c) {
 515         name = get_tok_str(sym->v, NULL);
 516 #ifdef CONFIG_TCC_BCHECK
 517         if (tcc_state->do_bounds_check) {
 518             char buf[32];
 519
 520             /* XXX: avoid doing that for statics ? */
 521             /* if bound checking is activated, we change some function
 522                names by adding the "__bound" prefix */
 523             switch(sym->v) {
 524 #ifdef TCC_TARGET_PE
 525             /* XXX: we rely only on malloc hooks */
 526             case TOK_malloc:
 527             case TOK_free:
 528             case TOK_realloc:
 529             case TOK_memalign:
 530             case TOK_calloc:
 531 #endif
 532             case TOK_memcpy:
 533             case TOK_memmove:
 534             case TOK_memset:
 535             case TOK_strlen:
 536             case TOK_strcpy:
 537             case TOK_alloca:
 538                 strcpy(buf, "__bound_");
 539                 strcat(buf, name);
 540                 name = buf;
 541                 break;
 542             }
 543         }
 544 #endif
 545         other = 0;
 546
 547 #ifdef TCC_TARGET_PE
 548         if (sym->type.t & VT_EXPORT)
 549             other |= 1;
 550         if (sym_type == STT_FUNC && sym->type.ref) {
 551             int attr = sym->type.ref->r;
 552             if (FUNC_EXPORT(attr))
 553                 other |= 1;
 554             if (FUNC_CALL(attr) == FUNC_STDCALL && can_add_underscore) {
 555                 sprintf(buf1, "_%s@%d", name, FUNC_ARGS(attr) * PTR_SIZE);
 556                 name = buf1;
 557                 other |= 2;
 558                 can_add_underscore = 0;
 559             }
 560         } else {
 561             if (find_elf_sym(tcc_state->dynsymtab_section, name))
 562                 other |= 4;
 563             if (sym->type.t & VT_IMPORT)
 564                 other |= 4;
 565         }
 566 #endif
 567         if (tcc_state->leading_underscore && can_add_underscore) {
 568             buf1[0] = '_';
 569             pstrcpy(buf1 + 1, sizeof(buf1) - 1, name);
 570             name = buf1;
 571         }
 572         if (sym->asm_label) {
 573             name = sym->asm_label;
 574         }
 575         info = ELFW(ST_INFO)(sym_bind, sym_type);
 576         sym->c = add_elf_sym(symtab_section, value, size, info, other, sh_num, name);
 577     } else {
 578         esym = &((ElfW(Sym) *)symtab_section->data)[sym->c];
 579         esym->st_value = value;
 580         esym->st_size = size;
 581         esym->st_shndx = sh_num;
 582     }
 583 }
 584
 585 ST_FUNC void put_extern_sym(Sym *sym, Section *section,
 586                            uplong value, unsigned long size)
 587 {
 588     put_extern_sym2(sym, section, value, size, 1);
 589 }
 590
 591 /* add a new relocation entry to symbol 'sym' in section 's' */
 592 ST_FUNC void greloc(Section *s, Sym *sym, unsigned long offset, int type)
 593 {
 594     int c = 0;
 595     if (sym) {
 596         if (0 == sym->c)
 597             put_extern_sym(sym, NULL, 0, 0);
 598         c = sym->c;
 599     }
 600     /* now we can add ELF relocation info */
 601     put_elf_reloc(symtab_section, s, offset, type, c);
 602 }
 603
 604 /********************************************************/
 605
 606 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 607 {
 608     int len;
 609     len = strlen(buf);
 610     vsnprintf(buf + len, buf_size - len, fmt, ap);
 611 }
 612
 613 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 614 {
 615     va_list ap;
 616     va_start(ap, fmt);
 617     strcat_vprintf(buf, buf_size, fmt, ap);
 618     va_end(ap);
 619 }
 620
 621 static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 622 {
 623     char buf[2048];
 624     BufferedFile **f;
 625
 626     buf[0] = '\0';
 627     if (file) {
 628         for(f = s1->include_stack; f < s1->include_stack_ptr; f++)
 629             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 630                           (*f)->filename, (*f)->line_num);
 631         if (file->line_num > 0) {
 632             strcat_printf(buf, sizeof(buf),
 633                           "%s:%d: ", file->filename, file->line_num);
 634         } else {
 635             strcat_printf(buf, sizeof(buf),
 636                           "%s: ", file->filename);
 637         }
 638     } else {
 639         strcat_printf(buf, sizeof(buf),
 640                       "tcc: ");
 641     }
 642     if (is_warning)
 643         strcat_printf(buf, sizeof(buf), "warning: ");
 644     else
 645         strcat_printf(buf, sizeof(buf), "error: ");
 646     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 647
 648     if (!s1->error_func) {
 649         /* default case: stderr */
 650         fprintf(stderr, "%s\n", buf);
 651     } else {
 652         s1->error_func(s1->error_opaque, buf);
 653     }
 654     if (!is_warning || s1->warn_error)
 655         s1->nb_errors++;
 656 }
 657
 658 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque,
 659                         void (*error_func)(void *opaque, const char *msg))
 660 {
 661     s->error_opaque = error_opaque;
 662     s->error_func = error_func;
 663 }
 664
 665 /* error without aborting current compilation */
 666 PUB_FUNC void tcc_error_noabort(const char *fmt, ...)
 667 {
 668     TCCState *s1 = tcc_state;
 669     va_list ap;
 670
 671     va_start(ap, fmt);
 672     error1(s1, 0, fmt, ap);
 673     va_end(ap);
 674 }
 675
 676 PUB_FUNC void tcc_error(const char *fmt, ...)
 677 {
 678     TCCState *s1 = tcc_state;
 679     va_list ap;
 680
 681     va_start(ap, fmt);
 682     error1(s1, 0, fmt, ap);
 683     va_end(ap);
 684     /* better than nothing: in some cases, we accept to handle errors */
 685     if (s1->error_set_jmp_enabled) {
 686         longjmp(s1->error_jmp_buf, 1);
 687     } else {
 688         /* XXX: eliminate this someday */
 689         exit(1);
 690     }
 691 }
 692
 693 PUB_FUNC void tcc_warning(const char *fmt, ...)
 694 {
 695     TCCState *s1 = tcc_state;
 696     va_list ap;
 697
 698     if (s1->warn_none)
 699         return;
 700
 701     va_start(ap, fmt);
 702     error1(s1, 1, fmt, ap);
 703     va_end(ap);
 704 }
 705
 706 /********************************************************/
 707 /* I/O layer */
 708
 709 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 710 {
 711     BufferedFile *bf;
 712     int buflen = initlen ? initlen : IO_BUF_SIZE;
 713
 714     bf = tcc_malloc(sizeof(BufferedFile) + buflen);
 715     bf->buf_ptr = bf->buffer;
 716     bf->buf_end = bf->buffer + initlen;
 717     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 718     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 719 #ifdef _WIN32
 720     normalize_slashes(bf->filename);
 721 #endif
 722     bf->line_num = 1;
 723     bf->ifndef_macro = 0;
 724     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 725     vio_initialize(&bf->fd);
 726     bf->prev = file;
 727     file = bf;
 728 }
 729
 730 ST_FUNC void tcc_close(void)
 731 {
 732     BufferedFile *bf = file;
 733     if (bf->fd.fd > 0) {
 734         vio_close(&bf->fd);
 735         total_lines += bf->line_num;
 736     }
 737     file = bf->prev;
 738     tcc_free(bf);
 739 }
 740
 741 ST_FUNC vio_fd tcc_open(TCCState *s1, const char *filename)
 742 {
 743     vio_fd fd;
 744     if (strcmp(filename, "-") == 0) {
 745         vio_initialize(&fd);
 746         fd.fd = 0, filename = "stdin";
 747     }
 748     else
 749         vio_open(s1, &fd, filename, O_RDONLY | O_BINARY);
 750     if ((s1->verbose == 2 && fd.fd >= 0) || s1->verbose == 3)
 751         printf("%s %*s%s\n", fd.fd < 0 ? "nf":"->",
 752                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 753     if (fd.fd < 0)
 754         return fd;
 755
 756     tcc_open_bf(s1, filename, 0);
 757     file->fd = fd;
 758     return fd;
 759 }
 760
 761 /* compile the C file opened in 'file'. Return non zero if errors. */
 762 static int tcc_compile(TCCState *s1)
 763 {
 764     Sym *define_start;
 765     SValue *pvtop;
 766     char buf[512];
 767     volatile int section_sym;
 768
 769 #ifdef INC_DEBUG
 770     printf("%s: **** new file\n", file->filename);
 771 #endif
 772     preprocess_init(s1);
 773
 774     cur_text_section = NULL;
 775     funcname = "";
 776     anon_sym = SYM_FIRST_ANOM;
 777
 778     /* file info: full path + filename */
 779     section_sym = 0; /* avoid warning */
 780     if (s1->do_debug) {
 781         section_sym = put_elf_sym(symtab_section, 0, 0,
 782                                   ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
 783                                   text_section->sh_num, NULL);
 784         getcwd(buf, sizeof(buf));
 785 #ifdef _WIN32
 786         normalize_slashes(buf);
 787 #endif
 788         pstrcat(buf, sizeof(buf), "/");
 789         put_stabs_r(buf, N_SO, 0, 0,
 790                     text_section->data_offset, text_section, section_sym);
 791         put_stabs_r(file->filename, N_SO, 0, 0,
 792                     text_section->data_offset, text_section, section_sym);
 793     }
 794     /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
 795        symbols can be safely used */
 796     put_elf_sym(symtab_section, 0, 0,
 797                 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
 798                 SHN_ABS, file->filename);
 799
 800     /* define some often used types */
 801     int_type.t = VT_INT;
 802
 803     char_pointer_type.t = VT_BYTE;
 804     mk_pointer(&char_pointer_type);
 805
 806 #if PTR_SIZE == 4
 807     size_type.t = VT_INT;
 808 #else
 809     size_type.t = VT_LLONG;
 810 #endif
 811
 812     func_old_type.t = VT_FUNC;
 813     func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
 814
 815 #if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP)
 816     float_type.t = VT_FLOAT;
 817     double_type.t = VT_DOUBLE;
 818
 819     func_float_type.t = VT_FUNC;
 820     func_float_type.ref = sym_push(SYM_FIELD, &float_type, FUNC_CDECL, FUNC_OLD);
 821     func_double_type.t = VT_FUNC;
 822     func_double_type.ref = sym_push(SYM_FIELD, &double_type, FUNC_CDECL, FUNC_OLD);
 823 #endif
 824
 825 #if 0
 826     /* define 'void *alloca(unsigned int)' builtin function */
 827     {
 828         Sym *s1;
 829
 830         p = anon_sym++;
 831         sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
 832         s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
 833         s1->next = NULL;
 834         sym->next = s1;
 835         sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
 836     }
 837 #endif
 838
 839     define_start = define_stack;
 840     nocode_wanted = 1;
 841
 842     if (setjmp(s1->error_jmp_buf) == 0) {
 843         s1->nb_errors = 0;
 844         s1->error_set_jmp_enabled = 1;
 845
 846         ch = file->buf_ptr[0];
 847         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 848         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
 849         pvtop = vtop;
 850         next();
 851         decl(VT_CONST);
 852         if (tok != TOK_EOF)
 853             expect("declaration");
 854         if (pvtop != vtop)
 855             tcc_warning("internal compiler error: vstack leak? (%d)", vtop - pvtop);
 856
 857         /* end of translation unit info */
 858         if (s1->do_debug) {
 859             put_stabs_r(NULL, N_SO, 0, 0,
 860                         text_section->data_offset, text_section, section_sym);
 861         }
 862     }
 863
 864     s1->error_set_jmp_enabled = 0;
 865
 866     /* reset define stack, but leave -Dsymbols (may be incorrect if
 867        they are undefined) */
 868     free_defines(define_start);
 869
 870     gen_inline_functions();
 871
 872     sym_pop(&global_stack, NULL);
 873     sym_pop(&local_stack, NULL);
 874
 875     return s1->nb_errors != 0 ? -1 : 0;
 876 }
 877
 878 LIBTCCAPI int tcc_compile_named_string(TCCState *s, const char *str, const char *strname)
 879 {
 880     int len, ret;
 881     len = strlen(str);
 882
 883     tcc_open_bf(s, strname ? strname : "<string>", len);
 884     memcpy(file->buffer, str, len);
 885     ret = tcc_compile(s);
 886     tcc_close();
 887     return ret;
 888 }
 889
 890 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 891 {
 892     return tcc_compile_named_string(s, str, NULL);
 893 }
 894
 895 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
 896 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 897 {
 898     int len1, len2;
 899     /* default value */
 900     if (!value)
 901         value = "1";
 902     len1 = strlen(sym);
 903     len2 = strlen(value);
 904
 905     /* init file structure */
 906     tcc_open_bf(s1, "<define>", len1 + len2 + 1);
 907     memcpy(file->buffer, sym, len1);
 908     file->buffer[len1] = ' ';
 909     memcpy(file->buffer + len1 + 1, value, len2);
 910
 911     /* parse with define parser */
 912     ch = file->buf_ptr[0];
 913     next_nomacro();
 914     parse_define();
 915
 916     tcc_close();
 917 }
 918
 919 /* undefine a preprocessor symbol */
 920 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 921 {
 922     TokenSym *ts;
 923     Sym *s;
 924     ts = tok_alloc(sym, strlen(sym));
 925     s = define_find(ts->tok);
 926     /* undefine symbol by putting an invalid name */
 927     if (s)
 928         define_undef(s);
 929 }
 930
 931 static void tcc_cleanup(void)
 932 {
 933     int i, n;
 934
 935     if (NULL == tcc_state)
 936         return;
 937     tcc_state = NULL;
 938
 939     /* free -D defines */
 940     free_defines(NULL);
 941
 942     /* free tokens */
 943     n = tok_ident - TOK_IDENT;
 944     for(i = 0; i < n; i++)
 945         tcc_free(table_ident[i]);
 946     tcc_free(table_ident);
 947
 948     /* free sym_pools */
 949     dynarray_reset(&sym_pools, &nb_sym_pools);
 950     /* string buffer */
 951     cstr_free(&tokcstr);
 952     /* reset symbol stack */
 953     sym_free_first = NULL;
 954     /* cleanup from error/setjmp */
 955     macro_ptr = NULL;
 956 }
 957
 958 LIBTCCAPI TCCState *tcc_new(void)
 959 {
 960     TCCState *s;
 961     char buffer[100];
 962     int a,b,c;
 963
 964     tcc_cleanup();
 965
 966     s = tcc_mallocz(sizeof(TCCState));
 967     if (!s)
 968         return NULL;
 969     tcc_state = s;
 970 #ifdef _WIN32
 971     tcc_set_lib_path_w32(s);
 972 #else
 973     tcc_set_lib_path(s, CONFIG_TCCDIR);
 974 #endif
 975     s->output_type = TCC_OUTPUT_MEMORY;
 976     preprocess_new();
 977     s->include_stack_ptr = s->include_stack;
 978
 979     /* we add dummy defines for some special macros to speed up tests
 980        and to have working defined() */
 981     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
 982     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
 983     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
 984     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
 985
 986     /* standard defines */
 987     tcc_define_symbol(s, "__STDC__", NULL);
 988     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 989 #if defined(TCC_TARGET_I386)
 990     tcc_define_symbol(s, "__i386__", NULL);
 991     tcc_define_symbol(s, "__i386", NULL);
 992     tcc_define_symbol(s, "i386", NULL);
 993 #endif
 994 #if defined(TCC_TARGET_X86_64)
 995     tcc_define_symbol(s, "__x86_64__", NULL);
 996 #endif
 997 #if defined(TCC_TARGET_ARM)
 998     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 999     tcc_define_symbol(s, "__arm_elf__", NULL);
1000     tcc_define_symbol(s, "__arm_elf", NULL);
1001     tcc_define_symbol(s, "arm_elf", NULL);
1002     tcc_define_symbol(s, "__arm__", NULL);
1003     tcc_define_symbol(s, "__arm", NULL);
1004     tcc_define_symbol(s, "arm", NULL);
1005     tcc_define_symbol(s, "__APCS_32__", NULL);
1006 #endif
1007 #ifdef TCC_TARGET_PE
1008     tcc_define_symbol(s, "_WIN32", NULL);
1009 #ifdef TCC_TARGET_X86_64
1010     tcc_define_symbol(s, "_WIN64", NULL);
1011 #endif
1012 #else
1013     tcc_define_symbol(s, "__unix__", NULL);
1014     tcc_define_symbol(s, "__unix", NULL);
1015     tcc_define_symbol(s, "unix", NULL);
1016 #if defined(__FreeBSD__)
1017 #define str(s) #s
1018     tcc_define_symbol(s, "__FreeBSD__", str( __FreeBSD__));
1019 #undef str
1020 #endif
1021 #if defined(__FreeBSD_kernel__)
1022     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
1023 #endif
1024 #if defined(__linux)
1025     tcc_define_symbol(s, "__linux__", NULL);
1026     tcc_define_symbol(s, "__linux", NULL);
1027 #endif
1028 #endif
1029     /* tiny C specific defines */
1030     sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
1031     sprintf(buffer, "%d", a*10000 + b*100 + c);
1032     tcc_define_symbol(s, "__TINYC__", buffer);
1033
1034     /* tiny C & gcc defines */
1035 #if defined TCC_TARGET_PE && defined TCC_TARGET_X86_64
1036     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
1037     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
1038 #else
1039     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
1040     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
1041 #endif
1042
1043 #ifdef TCC_TARGET_PE
1044     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
1045 #else
1046     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
1047 #endif
1048
1049     /* glibc defines */
1050     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)", "name proto __asm__ (#alias)");
1051     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)", "name proto __asm__ (#alias) __THROW");
1052
1053 #ifndef TCC_TARGET_PE
1054     /* default library paths */
1055     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
1056     /* paths for crt objects */
1057     tcc_split_path(s, (void ***)&s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
1058 #endif
1059
1060     /* no section zero */
1061     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
1062
1063     /* create standard sections */
1064     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
1065     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
1066     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
1067
1068     /* symbols are always generated for linking stage */
1069     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
1070                                 ".strtab",
1071                                 ".hashtab", SHF_PRIVATE);
1072     strtab_section = symtab_section->link;
1073     s->symtab = symtab_section;
1074
1075     /* private symbol table for dynamic symbols */
1076     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
1077                                       ".dynstrtab",
1078                                       ".dynhashtab", SHF_PRIVATE);
1079     s->alacarte_link = 1;
1080     s->nocommon = 1;
1081
1082 #ifdef CHAR_IS_UNSIGNED
1083     s->char_is_unsigned = 1;
1084 #endif
1085     /* enable this if you want symbols with leading underscore on windows: */
1086 #if defined(TCC_TARGET_PE) && 0
1087     s->leading_underscore = 1;
1088 #endif
1089     if (s->section_align == 0)
1090         s->section_align = ELF_PAGE_SIZE;
1091 #ifdef TCC_TARGET_I386
1092     s->seg_size = 32;
1093 #endif
1094     s->vio_module = NULL;
1095     return s;
1096 }
1097
1098 LIBTCCAPI void tcc_delete(TCCState *s1)
1099 {
1100     int i;
1101
1102     tcc_cleanup();
1103
1104     /* free all sections */
1105     for(i = 1; i < s1->nb_sections; i++)
1106         free_section(s1->sections[i]);
1107     dynarray_reset(&s1->sections, &s1->nb_sections);
1108
1109     for(i = 0; i < s1->nb_priv_sections; i++)
1110         free_section(s1->priv_sections[i]);
1111     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1112
1113     /* free any loaded DLLs */
1114     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1115         DLLReference *ref = s1->loaded_dlls[i];
1116         if ( ref->handle )
1117             dlclose(ref->handle);
1118     }
1119
1120     /* free loaded dlls array */
1121     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1122
1123     /* free library paths */
1124     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1125     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
1126
1127     /* free include paths */
1128     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1129     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1130     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1131
1132     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
1133
1134     tcc_free(s1->tcc_lib_path);
1135
1136 #ifdef HAVE_SELINUX
1137     munmap (s1->write_mem, s1->mem_size);
1138     munmap (s1->runtime_mem, s1->mem_size);
1139 #else
1140     tcc_free(s1->runtime_mem);
1141 #endif
1142     tcc_free(s1);
1143 }
1144
1145 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
1146 {
1147     tcc_split_path(s, (void ***)&s->include_paths, &s->nb_include_paths, pathname);
1148     return 0;
1149 }
1150
1151 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
1152 {
1153     tcc_split_path(s, (void ***)&s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
1154     return 0;
1155 }
1156
1157 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1158 {
1159     const char *ext;
1160     ElfW(Ehdr) ehdr;
1161     int ret=0, size;
1162     vio_fd fd;
1163
1164     /* find source file type with extension */
1165     ext = tcc_fileextension(filename);
1166     if (ext[0])
1167         ext++;
1168
1169 #ifdef CONFIG_TCC_ASM
1170     /* if .S file, define __ASSEMBLER__ like gcc does */
1171     if (!strcmp(ext, "S"))
1172         tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
1173 #endif
1174
1175     /* open the file */
1176     fd = tcc_open(s1, filename);
1177     if (fd.fd < 0) {
1178         if (flags & AFF_PRINT_ERROR)
1179             tcc_error_noabort("file '%s' not found", filename);
1180         return fd.fd;
1181     }
1182
1183     /* update target deps */
1184     dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1185             tcc_strdup(filename));
1186
1187     if (flags & AFF_PREPROCESS) {
1188         ret = tcc_preprocess(s1);
1189         goto the_end;
1190     }
1191
1192     if (!ext[0] || !PATHCMP(ext, "c")) {
1193         /* C file assumed */
1194         ret = tcc_compile(s1);
1195         goto the_end;
1196     }
1197
1198 #ifdef CONFIG_TCC_ASM
1199     if (!strcmp(ext, "S")) {
1200         /* preprocessed assembler */
1201         ret = tcc_assemble(s1, 1);
1202         goto the_end;
1203     }
1204
1205     if (!strcmp(ext, "s")) {
1206         /* non preprocessed assembler */
1207         ret = tcc_assemble(s1, 0);
1208         goto the_end;
1209     }
1210 #endif
1211
1212     fd = file->fd;
1213     /* assume executable format: auto guess file type */
1214     size = vio_read(fd, &ehdr, sizeof(ehdr));
1215     vio_lseek(fd, 0, SEEK_SET);
1216     if (size <= 0) {
1217         tcc_error_noabort("could not read header");
1218         goto the_end;
1219     }
1220
1221     if (size == sizeof(ehdr) &&
1222         ehdr.e_ident[0] == ELFMAG0 &&
1223         ehdr.e_ident[1] == ELFMAG1 &&
1224         ehdr.e_ident[2] == ELFMAG2 &&
1225         ehdr.e_ident[3] == ELFMAG3) {
1226
1227         /* do not display line number if error */
1228         file->line_num = 0;
1229         if (ehdr.e_type == ET_REL) {
1230             ret = tcc_load_object_file(s1, fd, 0);
1231             goto the_end;
1232
1233         }
1234 #ifndef TCC_TARGET_PE
1235         if (ehdr.e_type == ET_DYN) {
1236             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1237                 void *h;
1238                 h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1239                 if (h)
1240                     ret = 0;
1241             } else {
1242                 ret = tcc_load_dll(s1, fd, filename,
1243                                    (flags & AFF_REFERENCED_DLL) != 0);
1244             }
1245             goto the_end;
1246         }
1247 #endif
1248         tcc_error_noabort("unrecognized ELF file");
1249         goto the_end;
1250     }
1251
1252     if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
1253         file->line_num = 0; /* do not display line number if error */
1254         ret = tcc_load_archive(s1, fd);
1255         goto the_end;
1256     }
1257
1258 #ifdef TCC_TARGET_COFF
1259     if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
1260         ret = tcc_load_coff(s1, fd);
1261         goto the_end;
1262     }
1263 #endif
1264
1265 #ifdef TCC_TARGET_PE
1266     ret = pe_load_file(s1, filename, fd);
1267 #else
1268     /* as GNU ld, consider it is an ld script if not recognized */
1269     ret = tcc_load_ldscript(s1);
1270 #endif
1271     if (ret < 0)
1272         tcc_error_noabort("unrecognized file type");
1273
1274 the_end:
1275     tcc_close();
1276     return ret;
1277 }
1278
1279 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1280 {
1281     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1282         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS);
1283     else
1284         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR);
1285 }
1286
1287 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1288 {
1289     tcc_split_path(s, (void ***)&s->library_paths, &s->nb_library_paths, pathname);
1290     return 0;
1291 }
1292
1293 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1294     const char *filename, int flags, char **paths, int nb_paths)
1295 {
1296     char buf[1024];
1297     int i;
1298
1299     for(i = 0; i < nb_paths; i++) {
1300         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1301         if (tcc_add_file_internal(s, buf, flags) == 0)
1302             return 0;
1303     }
1304     return -1;
1305 }
1306
1307 #ifndef TCC_TARGET_PE
1308 /* find and load a dll. Return non zero if not found */
1309 /* XXX: add '-rpath' option support ? */
1310 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1311 {
1312     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1313         s->library_paths, s->nb_library_paths);
1314 }
1315 #endif
1316
1317 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename)
1318 {
1319     if (-1 == tcc_add_library_internal(s, "%s/%s",
1320         filename, 0, s->crt_paths, s->nb_crt_paths))
1321         tcc_error_noabort("file '%s' not found", filename);
1322     return 0;
1323 }
1324
1325 /* the library name is the same as the argument of the '-l' option */
1326 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1327 {
1328 #ifdef TCC_TARGET_PE
1329     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1330     const char **pp = s->static_link ? libs + 4 : libs;
1331 #else
1332     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1333     const char **pp = s->static_link ? libs + 1 : libs;
1334 #endif
1335     while (*pp) {
1336         if (0 == tcc_add_library_internal(s, *pp,
1337             libraryname, 0, s->library_paths, s->nb_library_paths))
1338             return 0;
1339         ++pp;
1340     }
1341     return -1;
1342 }
1343
1344 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1345 {
1346 #ifdef TCC_TARGET_PE
1347     pe_putimport(s, 0, name, val);
1348 #else
1349     add_elf_sym(symtab_section, (uplong)val, 0,
1350                 ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1351                 SHN_ABS, name);
1352 #endif
1353     return 0;
1354 }
1355
1356 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
1357 {
1358     s->output_type = output_type;
1359
1360     if (!s->nostdinc) {
1361         /* default include paths */
1362         /* -isystem paths have already been handled */
1363         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
1364     }
1365
1366     /* if bound checking, then add corresponding sections */
1367 #ifdef CONFIG_TCC_BCHECK
1368     if (s->do_bounds_check) {
1369         /* define symbol */
1370         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1371         /* create bounds sections */
1372         bounds_section = new_section(s, ".bounds",
1373                                      SHT_PROGBITS, SHF_ALLOC);
1374         lbounds_section = new_section(s, ".lbounds",
1375                                       SHT_PROGBITS, SHF_ALLOC);
1376     }
1377 #endif
1378
1379     if (s->char_is_unsigned) {
1380         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
1381     }
1382
1383     /* add debug sections */
1384     if (s->do_debug) {
1385         /* stab symbols */
1386         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
1387         stab_section->sh_entsize = sizeof(Stab_Sym);
1388         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
1389         put_elf_str(stabstr_section, "");
1390         stab_section->link = stabstr_section;
1391         /* put first entry */
1392         put_stabs("", 0, 0, 0, 0);
1393     }
1394
1395 #ifdef TCC_TARGET_PE
1396     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
1397 # ifdef _WIN32
1398     tcc_add_systemdir(s);
1399 # endif
1400 #else
1401     /* add libc crt1/crti objects */
1402     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1403         !s->nostdlib) {
1404         if (output_type != TCC_OUTPUT_DLL)
1405             tcc_add_crt(s, "crt1.o");
1406         tcc_add_crt(s, "crti.o");
1407     }
1408 #endif
1409     return 0;
1410 }
1411
1412 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1413 #define FD_INVERT 0x0002 /* invert value before storing */
1414
1415 typedef struct FlagDef {
1416     uint16_t offset;
1417     uint16_t flags;
1418     const char *name;
1419 } FlagDef;
1420
1421 static const FlagDef warning_defs[] = {
1422     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1423     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1424     { offsetof(TCCState, warn_error), 0, "error" },
1425     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1426       "implicit-function-declaration" },
1427 };
1428
1429 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1430                     const char *name, int value)
1431 {
1432     int i;
1433     const FlagDef *p;
1434     const char *r;
1435
1436     r = name;
1437     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
1438         r += 3;
1439         value = !value;
1440     }
1441     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1442         if (!strcmp(r, p->name))
1443             goto found;
1444     }
1445     return -1;
1446  found:
1447     if (p->flags & FD_INVERT)
1448         value = !value;
1449     *(int *)((uint8_t *)s + p->offset) = value;
1450     return 0;
1451 }
1452
1453 /* enable debug */
1454 LIBTCCAPI void tcc_enable_debug(TCCState *s)
1455 {
1456     s->do_debug = 1;
1457 }
1458
1459 /* set/reset a warning */
1460 LIBTCCAPI int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1461 {
1462     int i;
1463     const FlagDef *p;
1464
1465     if (!strcmp(warning_name, "all")) {
1466         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1467             if (p->flags & WD_ALL)
1468                 *(int *)((uint8_t *)s + p->offset) = 1;
1469         }
1470         return 0;
1471     } else {
1472         return set_flag(s, warning_defs, countof(warning_defs),
1473                         warning_name, value);
1474     }
1475 }
1476
1477 static const FlagDef flag_defs[] = {
1478     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1479     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1480     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1481     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1482 };
1483
1484 /* set/reset a flag */
1485 PUB_FUNC int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1486 {
1487     return set_flag(s, flag_defs, countof(flag_defs),
1488                     flag_name, value);
1489 }
1490
1491
1492 static int strstart(const char *str, const char *val, char **ptr)
1493 {
1494     const char *p, *q;
1495     p = str;
1496     q = val;
1497     while (*q != '\0') {
1498         if (*p != *q)
1499             return 0;
1500         p++;
1501         q++;
1502     }
1503     if (ptr)
1504         *ptr = (char *) p;
1505     return 1;
1506 }
1507
1508
1509 /* Like strstart, but automatically takes into account that ld options can
1510  *
1511  * - start with double or single dash (e.g. '--soname' or '-soname')
1512  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1513  *   or '-Wl,-soname=x.so')
1514  *
1515  * you provide `val` always in 'option[=]' form (no leading -)
1516  */
1517 static int link_option(const char *str, const char *val, char **ptr)
1518 {
1519     const char *p, *q;
1520
1521     /* there should be 1 or 2 dashes */
1522     if (*str++ != '-')
1523         return 0;
1524     if (*str == '-')
1525         str++;
1526
1527     /* then str & val should match (potentialy up to '=') */
1528     p = str;
1529     q = val;
1530
1531     while (*q != '\0' && *q != '=') {
1532         if (*p != *q)
1533             return 0;
1534         p++;
1535         q++;
1536     }
1537
1538     /* '=' near eos means ',' or '=' is ok */
1539     if (*q == '=') {
1540         if (*p != ',' && *p != '=')
1541             return 0;
1542         p++;
1543         q++;
1544     }
1545
1546     if (ptr)
1547         *ptr = (char *) p;
1548     return 1;
1549 }
1550
1551
1552 /* set linker options */
1553 PUB_FUNC const char * tcc_set_linker(TCCState *s, char *option, int multi)
1554 {
1555     char *p = option;
1556     char *end;
1557
1558     while (option && *option) {
1559         end = NULL;
1560         if (link_option(option, "Bsymbolic", &p)) {
1561             s->symbolic = TRUE;
1562         } else if (link_option(option, "nostdlib", &p)) {
1563             s->nostdlib = TRUE;
1564         } else if (link_option(option, "fini=", &p)) {
1565             s->fini_symbol = p;
1566             if (s->warn_unsupported)
1567                 tcc_warning("ignoring -fini %s", p);
1568         } else if (link_option(option, "image-base=", &p)) {
1569             s->text_addr = strtoull(p, &end, 16);
1570             s->has_text_addr = 1;
1571         } else if (link_option(option, "init=", &p)) {
1572             s->init_symbol = p;
1573             if (s->warn_unsupported)
1574                 tcc_warning("ignoring -init %s", p);
1575         } else if (link_option(option, "oformat=", &p)) {
1576 #if defined(TCC_TARGET_PE)
1577             if (strstart(p, "pe-", NULL)) {
1578 #else
1579 #if defined(TCC_TARGET_X86_64)
1580             if (strstart(p, "elf64-", NULL)) {
1581 #else
1582             if (strstart(p, "elf32-", NULL)) {
1583 #endif
1584 #endif
1585                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1586             } else if (!strcmp(p, "binary")) {
1587                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1588             } else
1589 #ifdef TCC_TARGET_COFF
1590             if (!strcmp(p, "coff")) {
1591                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1592             } else
1593 #endif
1594             {
1595                 return p;
1596             }
1597
1598         } else if (link_option(option, "rpath=", &p)) {
1599             s->rpath = p;
1600         } else if (link_option(option, "section-alignment=", &p)) {
1601             s->section_align = strtoul(p, &end, 16);
1602         } else if (link_option(option, "soname=", &p)) {
1603             s->soname = p;
1604             multi = 0;
1605 #ifdef TCC_TARGET_PE
1606         } else if (link_option(option, "file-alignment=", &p)) {
1607             s->pe_file_align = strtoul(p, &end, 16);
1608         } else if (link_option(option, "stack=", &p)) {
1609             s->pe_stack_size = strtoul(p, &end, 10);
1610         } else if (link_option(option, "subsystem=", &p)) {
1611 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1612             if (!strcmp(p, "native")) {
1613                 s->pe_subsystem = 1;
1614             } else if (!strcmp(p, "console")) {
1615                 s->pe_subsystem = 3;
1616             } else if (!strcmp(p, "gui")) {
1617                 s->pe_subsystem = 2;
1618             } else if (!strcmp(p, "posix")) {
1619                 s->pe_subsystem = 7;
1620             } else if (!strcmp(p, "efiapp")) {
1621                 s->pe_subsystem = 10;
1622             } else if (!strcmp(p, "efiboot")) {
1623                 s->pe_subsystem = 11;
1624             } else if (!strcmp(p, "efiruntime")) {
1625                 s->pe_subsystem = 12;
1626             } else if (!strcmp(p, "efirom")) {
1627                 s->pe_subsystem = 13;
1628 #elif defined(TCC_TARGET_ARM)
1629             if (!strcmp(p, "wince")) {
1630                 s->pe_subsystem = 9;
1631 #endif
1632             } else {
1633                 return p;
1634             }
1635 #endif
1636
1637         } else if (link_option(option, "Ttext=", &p)) {
1638             s->text_addr = strtoull(p, &end, 16);
1639             s->has_text_addr = 1;
1640         } else {
1641             char *comma_ptr = strchr(option, ',');
1642             if (comma_ptr)
1643                 *comma_ptr = '\0';
1644             return option;
1645         }
1646
1647         if (multi) {
1648             option = NULL;
1649             p = strchr( (end) ? end : p, ',');
1650             if (p) {
1651                 *p = 0;    /* terminate last option */
1652                 option = ++p;
1653             }
1654         } else
1655             option = NULL;
1656     }
1657     return NULL;
1658 }
1659
1660 PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time)
1661 {
1662     double tt;
1663     tt = (double)total_time / 1000000.0;
1664     if (tt < 0.001)
1665         tt = 0.001;
1666     if (total_bytes < 1)
1667         total_bytes = 1;
1668     printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
1669            tok_ident - TOK_IDENT, total_lines, total_bytes,
1670            tt, (int)(total_lines / tt),
1671            total_bytes / tt / 1000000.0);
1672 }
1673
1674 /* set CONFIG_TCCDIR at runtime */
1675 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1676 {
1677     tcc_free(s->tcc_lib_path);
1678     s->tcc_lib_path = tcc_strdup(path);
1679 }
1680
1681 PUB_FUNC char *tcc_default_target(TCCState *s, const char *default_file)
1682 {
1683     char buf[1024];
1684     char *ext;
1685     const char *name = "a";
1686
1687     if (default_file && strcmp(default_file, "-"))
1688         name = tcc_basename(default_file);
1689     pstrcpy(buf, sizeof(buf), name);
1690     ext = tcc_fileextension(buf);
1691 #ifdef TCC_TARGET_PE
1692     if (s->output_type == TCC_OUTPUT_DLL)
1693         strcpy(ext, ".dll");
1694     else
1695     if (s->output_type == TCC_OUTPUT_EXE)
1696         strcpy(ext, ".exe");
1697     else
1698 #endif
1699     if (( (s->output_type == TCC_OUTPUT_OBJ && !s->reloc_output) ||
1700           (s->output_type == TCC_OUTPUT_PREPROCESS) )
1701         && *ext)
1702         strcpy(ext, ".o");
1703     else
1704         pstrcpy(buf, sizeof(buf), "a.out");
1705
1706     return tcc_strdup(buf);
1707 }
1708
1709
1710 PUB_FUNC void tcc_gen_makedeps(TCCState *s, const char *target, const char *filename)
1711 {
1712     FILE *depout;
1713     char buf[1024], *ext;
1714     int i;
1715
1716     if (!filename) {
1717         /* compute filename automatically
1718          * dir/file.o -> dir/file.d             */
1719         pstrcpy(buf, sizeof(buf), target);
1720         ext = tcc_fileextension(buf);
1721         pstrcpy(ext, sizeof(buf) - (ext-buf), ".d");
1722         filename = buf;
1723     }
1724
1725     if (s->verbose)
1726         printf("<- %s\n", filename);
1727
1728     /* XXX return err codes instead of error() ? */
1729     depout = fopen(filename, "w");
1730     if (!depout)
1731         tcc_error("could not open '%s'", filename);
1732
1733     fprintf(depout, "%s : \\\n", target);
1734     for (i=0; i<s->nb_target_deps; ++i)
1735         fprintf(depout, " %s \\\n", s->target_deps[i]);
1736     fprintf(depout, "\n");
1737     fclose(depout);
1738 }