libtcc.c

   1 /*
   2  *  TCC - Tiny C Compiler
   3  *
   4  *  Copyright (c) 2001-2004 Fabrice Bellard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "tcc.h"
  22
  23 /********************************************************/
  24 /* global variables */
  25
  26 /* use GNU C extensions */
  27 ST_DATA int gnu_ext = 1;
  28
  29 /* use TinyCC extensions */
  30 ST_DATA int tcc_ext = 1;
  31
  32 /* XXX: get rid of this ASAP */
  33 ST_DATA struct TCCState *tcc_state;
  34
  35 /********************************************************/
  36
  37 #ifdef ONE_SOURCE
  38 #include "tccpp.c"
  39 #include "tccgen.c"
  40 #include "tccelf.c"
  41 #include "tccrun.c"
  42 #ifdef TCC_TARGET_I386
  43 #include "i386-gen.c"
  44 #endif
  45 #ifdef TCC_TARGET_ARM
  46 #include "arm-gen.c"
  47 #endif
  48 #ifdef TCC_TARGET_C67
  49 #include "c67-gen.c"
  50 #endif
  51 #ifdef TCC_TARGET_X86_64
  52 #include "x86_64-gen.c"
  53 #endif
  54 #ifdef CONFIG_TCC_ASM
  55 #include "tccasm.c"
  56 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
  57 #include "i386-asm.c"
  58 #endif
  59 #endif
  60 #ifdef TCC_TARGET_COFF
  61 #include "tcccoff.c"
  62 #endif
  63 #ifdef TCC_TARGET_PE
  64 #include "tccpe.c"
  65 #endif
  66 #endif /* ONE_SOURCE */
  67
  68 /********************************************************/
  69 #ifndef CONFIG_TCC_ASM
  70 ST_FUNC void asm_instr(void)
  71 {
  72     tcc_error("inline asm() not supported");
  73 }
  74 ST_FUNC void asm_global_instr(void)
  75 {
  76     tcc_error("inline asm() not supported");
  77 }
  78 #endif
  79
  80 /********************************************************/
  81
  82 #ifdef _WIN32
  83 static char *normalize_slashes(char *path)
  84 {
  85     char *p;
  86     for (p = path; *p; ++p)
  87         if (*p == '\\')
  88             *p = '/';
  89     return path;
  90 }
  91
  92 static HMODULE tcc_module;
  93
  94 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
  95 static void tcc_set_lib_path_w32(TCCState *s)
  96 {
  97     char path[1024], *p;
  98     GetModuleFileNameA(tcc_module, path, sizeof path);
  99     p = tcc_basename(normalize_slashes(strlwr(path)));
 100     if (p - 5 > path && 0 == strncmp(p - 5, "/bin/", 5))
 101         p -= 5;
 102     else if (p > path)
 103         p--;
 104     *p = 0;
 105     tcc_set_lib_path(s, path);
 106 }
 107
 108 #ifdef TCC_TARGET_PE
 109 static void tcc_add_systemdir(TCCState *s)
 110 {
 111     char buf[1000];
 112     GetSystemDirectory(buf, sizeof buf);
 113     tcc_add_library_path(s, normalize_slashes(buf));
 114 }
 115 #endif
 116
 117 #ifndef CONFIG_TCC_STATIC
 118 void dlclose(void *p)
 119 {
 120     FreeLibrary((HMODULE)p);
 121 }
 122 #endif
 123
 124 #ifdef LIBTCC_AS_DLL
 125 BOOL WINAPI DllMain (HANDLE hDll, DWORD dwReason, LPVOID lpReserved)
 126 {
 127     if (DLL_PROCESS_ATTACH == dwReason)
 128         tcc_module = hDll;
 129     return TRUE;
 130 }
 131 #endif
 132 #endif
 133
 134 /********************************************************/
 135 /* copy a string and truncate it. */
 136 PUB_FUNC char *pstrcpy(char *buf, int buf_size, const char *s)
 137 {
 138     char *q, *q_end;
 139     int c;
 140
 141     if (buf_size > 0) {
 142         q = buf;
 143         q_end = buf + buf_size - 1;
 144         while (q < q_end) {
 145             c = *s++;
 146             if (c == '\0')
 147                 break;
 148             *q++ = c;
 149         }
 150         *q = '\0';
 151     }
 152     return buf;
 153 }
 154
 155 /* strcat and truncate. */
 156 PUB_FUNC char *pstrcat(char *buf, int buf_size, const char *s)
 157 {
 158     int len;
 159     len = strlen(buf);
 160     if (len < buf_size)
 161         pstrcpy(buf + len, buf_size - len, s);
 162     return buf;
 163 }
 164
 165 PUB_FUNC char *pstrncpy(char *out, const char *in, size_t num)
 166 {
 167     memcpy(out, in, num);
 168     out[num] = '\0';
 169     return out;
 170 }
 171
 172 /* extract the basename of a file */
 173 PUB_FUNC char *tcc_basename(const char *name)
 174 {
 175     char *p = strchr(name, 0);
 176     while (p > name && !IS_DIRSEP(p[-1]))
 177         --p;
 178     return p;
 179 }
 180
 181 /* extract extension part of a file
 182  *
 183  * (if no extension, return pointer to end-of-string)
 184  */
 185 PUB_FUNC char *tcc_fileextension (const char *name)
 186 {
 187     char *b = tcc_basename(name);
 188     char *e = strrchr(b, '.');
 189     return e ? e : strchr(b, 0);
 190 }
 191
 192 /********************************************************/
 193 /* memory management */
 194
 195 #undef free
 196 #undef malloc
 197 #undef realloc
 198
 199 #ifdef MEM_DEBUG
 200 ST_DATA int mem_cur_size;
 201 ST_DATA int mem_max_size;
 202 unsigned malloc_usable_size(void*);
 203 #endif
 204
 205 PUB_FUNC void tcc_free(void *ptr)
 206 {
 207 #ifdef MEM_DEBUG
 208     mem_cur_size -= malloc_usable_size(ptr);
 209 #endif
 210     free(ptr);
 211 }
 212
 213 PUB_FUNC void *tcc_malloc(unsigned long size)
 214 {
 215     void *ptr;
 216     ptr = malloc(size);
 217     if (!ptr && size)
 218         tcc_error("memory full");
 219 #ifdef MEM_DEBUG
 220     mem_cur_size += malloc_usable_size(ptr);
 221     if (mem_cur_size > mem_max_size)
 222         mem_max_size = mem_cur_size;
 223 #endif
 224     return ptr;
 225 }
 226
 227 PUB_FUNC void *tcc_mallocz(unsigned long size)
 228 {
 229     void *ptr;
 230     ptr = tcc_malloc(size);
 231     memset(ptr, 0, size);
 232     return ptr;
 233 }
 234
 235 PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
 236 {
 237     void *ptr1;
 238 #ifdef MEM_DEBUG
 239     mem_cur_size -= malloc_usable_size(ptr);
 240 #endif
 241     ptr1 = realloc(ptr, size);
 242     if (!ptr1 && size)
 243         tcc_error("memory full");
 244 #ifdef MEM_DEBUG
 245     /* NOTE: count not correct if alloc error, but not critical */
 246     mem_cur_size += malloc_usable_size(ptr1);
 247     if (mem_cur_size > mem_max_size)
 248         mem_max_size = mem_cur_size;
 249 #endif
 250     return ptr1;
 251 }
 252
 253 PUB_FUNC char *tcc_strdup(const char *str)
 254 {
 255     char *ptr;
 256     ptr = tcc_malloc(strlen(str) + 1);
 257     strcpy(ptr, str);
 258     return ptr;
 259 }
 260
 261 PUB_FUNC void tcc_memstats(void)
 262 {
 263 #ifdef MEM_DEBUG
 264     printf("memory: %d bytes, max = %d bytes\n", mem_cur_size, mem_max_size);
 265 #endif
 266 }
 267
 268 #define free(p) use_tcc_free(p)
 269 #define malloc(s) use_tcc_malloc(s)
 270 #define realloc(p, s) use_tcc_realloc(p, s)
 271
 272 /********************************************************/
 273 /* dynarrays */
 274
 275 ST_FUNC void dynarray_add(void ***ptab, int *nb_ptr, void *data)
 276 {
 277     int nb, nb_alloc;
 278     void **pp;
 279
 280     nb = *nb_ptr;
 281     pp = *ptab;
 282     /* every power of two we double array size */
 283     if ((nb & (nb - 1)) == 0) {
 284         if (!nb)
 285             nb_alloc = 1;
 286         else
 287             nb_alloc = nb * 2;
 288         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 289         *ptab = pp;
 290     }
 291     pp[nb++] = data;
 292     *nb_ptr = nb;
 293 }
 294
 295 ST_FUNC void dynarray_reset(void *pp, int *n)
 296 {
 297     void **p;
 298     for (p = *(void***)pp; *n; ++p, --*n)
 299         if (*p)
 300             tcc_free(*p);
 301     tcc_free(*(void**)pp);
 302     *(void**)pp = NULL;
 303 }
 304
 305 static void tcc_split_path(TCCState *s, void ***p_ary, int *p_nb_ary, const char *in)
 306 {
 307     const char *p;
 308     do {
 309         int c;
 310         CString str;
 311
 312         cstr_new(&str);
 313         for (p = in; c = *p, c != '\0' && c != PATHSEP; ++p) {
 314             if (c == '{' && p[1] && p[2] == '}') {
 315                 c = p[1], p += 2;
 316                 if (c == 'B')
 317                     cstr_cat(&str, s->tcc_lib_path);
 318             } else {
 319                 cstr_ccat(&str, c);
 320             }
 321         }
 322         cstr_ccat(&str, '\0');
 323         dynarray_add(p_ary, p_nb_ary, str.data);
 324         in = p+1;
 325     } while (*p);
 326 }
 327
 328 /********************************************************/
 329
 330 ST_FUNC Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags)
 331 {
 332     Section *sec;
 333
 334     sec = tcc_mallocz(sizeof(Section) + strlen(name));
 335     strcpy(sec->name, name);
 336     sec->sh_type = sh_type;
 337     sec->sh_flags = sh_flags;
 338     switch(sh_type) {
 339     case SHT_HASH:
 340     case SHT_REL:
 341     case SHT_RELA:
 342     case SHT_DYNSYM:
 343     case SHT_SYMTAB:
 344     case SHT_DYNAMIC:
 345         sec->sh_addralign = 4;
 346         break;
 347     case SHT_STRTAB:
 348         sec->sh_addralign = 1;
 349         break;
 350     default:
 351         sec->sh_addralign = 32; /* default conservative alignment */
 352         break;
 353     }
 354
 355     if (sh_flags & SHF_PRIVATE) {
 356         dynarray_add((void ***)&s1->priv_sections, &s1->nb_priv_sections, sec);
 357     } else {
 358         sec->sh_num = s1->nb_sections;
 359         dynarray_add((void ***)&s1->sections, &s1->nb_sections, sec);
 360     }
 361
 362     return sec;
 363 }
 364
 365 static void free_section(Section *s)
 366 {
 367     tcc_free(s->data);
 368 }
 369
 370 /* realloc section and set its content to zero */
 371 ST_FUNC void section_realloc(Section *sec, unsigned long new_size)
 372 {
 373     unsigned long size;
 374     unsigned char *data;
 375
 376     size = sec->data_allocated;
 377     if (size == 0)
 378         size = 1;
 379     while (size < new_size)
 380         size = size * 2;
 381     data = tcc_realloc(sec->data, size);
 382     memset(data + sec->data_allocated, 0, size - sec->data_allocated);
 383     sec->data = data;
 384     sec->data_allocated = size;
 385 }
 386
 387 /* reserve at least 'size' bytes in section 'sec' from
 388    sec->data_offset. */
 389 ST_FUNC void *section_ptr_add(Section *sec, unsigned long size)
 390 {
 391     unsigned long offset, offset1;
 392
 393     offset = sec->data_offset;
 394     offset1 = offset + size;
 395     if (offset1 > sec->data_allocated)
 396         section_realloc(sec, offset1);
 397     sec->data_offset = offset1;
 398     return sec->data + offset;
 399 }
 400
 401 /* reserve at least 'size' bytes from section start */
 402 ST_FUNC void section_reserve(Section *sec, unsigned long size)
 403 {
 404     if (size > sec->data_allocated)
 405         section_realloc(sec, size);
 406     if (size > sec->data_offset)
 407         sec->data_offset = size;
 408 }
 409
 410 /* return a reference to a section, and create it if it does not
 411    exists */
 412 ST_FUNC Section *find_section(TCCState *s1, const char *name)
 413 {
 414     Section *sec;
 415     int i;
 416     for(i = 1; i < s1->nb_sections; i++) {
 417         sec = s1->sections[i];
 418         if (!strcmp(name, sec->name))
 419             return sec;
 420     }
 421     /* sections are created as PROGBITS */
 422     return new_section(s1, name, SHT_PROGBITS, SHF_ALLOC);
 423 }
 424
 425 /* update sym->c so that it points to an external symbol in section
 426    'section' with value 'value' */
 427 ST_FUNC void put_extern_sym2(Sym *sym, Section *section,
 428                             addr_t value, unsigned long size,
 429                             int can_add_underscore)
 430 {
 431     int sym_type, sym_bind, sh_num, info, other;
 432     ElfW(Sym) *esym;
 433     const char *name;
 434     char buf1[256];
 435
 436     if (section == NULL)
 437         sh_num = SHN_UNDEF;
 438     else if (section == SECTION_ABS)
 439         sh_num = SHN_ABS;
 440     else
 441         sh_num = section->sh_num;
 442
 443     if ((sym->type.t & VT_BTYPE) == VT_FUNC) {
 444         sym_type = STT_FUNC;
 445     } else if ((sym->type.t & VT_BTYPE) == VT_VOID) {
 446         sym_type = STT_NOTYPE;
 447     } else {
 448         sym_type = STT_OBJECT;
 449     }
 450
 451     if (sym->type.t & VT_STATIC)
 452         sym_bind = STB_LOCAL;
 453     else {
 454         if (sym->type.t & VT_WEAK)
 455             sym_bind = STB_WEAK;
 456         else
 457             sym_bind = STB_GLOBAL;
 458     }
 459
 460     if (!sym->c) {
 461         name = get_tok_str(sym->v, NULL);
 462 #ifdef CONFIG_TCC_BCHECK
 463         if (tcc_state->do_bounds_check) {
 464             char buf[32];
 465
 466             /* XXX: avoid doing that for statics ? */
 467             /* if bound checking is activated, we change some function
 468                names by adding the "__bound" prefix */
 469             switch(sym->v) {
 470 #ifdef TCC_TARGET_PE
 471             /* XXX: we rely only on malloc hooks */
 472             case TOK_malloc:
 473             case TOK_free:
 474             case TOK_realloc:
 475             case TOK_memalign:
 476             case TOK_calloc:
 477 #endif
 478             case TOK_memcpy:
 479             case TOK_memmove:
 480             case TOK_memset:
 481             case TOK_strlen:
 482             case TOK_strcpy:
 483             case TOK_alloca:
 484                 strcpy(buf, "__bound_");
 485                 strcat(buf, name);
 486                 name = buf;
 487                 break;
 488             }
 489         }
 490 #endif
 491         other = 0;
 492
 493 #ifdef TCC_TARGET_PE
 494         if (sym->type.t & VT_EXPORT)
 495             other |= 1;
 496         if (sym_type == STT_FUNC && sym->type.ref) {
 497             int attr = sym->type.ref->r;
 498             if (FUNC_EXPORT(attr))
 499                 other |= 1;
 500             if (FUNC_CALL(attr) == FUNC_STDCALL && can_add_underscore) {
 501                 sprintf(buf1, "_%s@%d", name, FUNC_ARGS(attr) * PTR_SIZE);
 502                 name = buf1;
 503                 other |= 2;
 504                 can_add_underscore = 0;
 505             }
 506         } else {
 507             if (find_elf_sym(tcc_state->dynsymtab_section, name))
 508                 other |= 4;
 509             if (sym->type.t & VT_IMPORT)
 510                 other |= 4;
 511         }
 512 #endif
 513         if (tcc_state->leading_underscore && can_add_underscore) {
 514             buf1[0] = '_';
 515             pstrcpy(buf1 + 1, sizeof(buf1) - 1, name);
 516             name = buf1;
 517         }
 518         if (sym->asm_label) {
 519             name = sym->asm_label;
 520         }
 521         info = ELFW(ST_INFO)(sym_bind, sym_type);
 522         sym->c = add_elf_sym(symtab_section, value, size, info, other, sh_num, name);
 523     } else {
 524         esym = &((ElfW(Sym) *)symtab_section->data)[sym->c];
 525         esym->st_value = value;
 526         esym->st_size = size;
 527         esym->st_shndx = sh_num;
 528     }
 529 }
 530
 531 ST_FUNC void put_extern_sym(Sym *sym, Section *section,
 532                            addr_t value, unsigned long size)
 533 {
 534     put_extern_sym2(sym, section, value, size, 1);
 535 }
 536
 537 /* add a new relocation entry to symbol 'sym' in section 's' */
 538 ST_FUNC void greloc(Section *s, Sym *sym, unsigned long offset, int type)
 539 {
 540     int c = 0;
 541     if (sym) {
 542         if (0 == sym->c)
 543             put_extern_sym(sym, NULL, 0, 0);
 544         c = sym->c;
 545     }
 546     /* now we can add ELF relocation info */
 547     put_elf_reloc(symtab_section, s, offset, type, c);
 548 }
 549
 550 /********************************************************/
 551
 552 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 553 {
 554     int len;
 555     len = strlen(buf);
 556     vsnprintf(buf + len, buf_size - len, fmt, ap);
 557 }
 558
 559 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 560 {
 561     va_list ap;
 562     va_start(ap, fmt);
 563     strcat_vprintf(buf, buf_size, fmt, ap);
 564     va_end(ap);
 565 }
 566
 567 static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 568 {
 569     char buf[2048];
 570     BufferedFile **pf, *f;
 571
 572     buf[0] = '\0';
 573     /* use upper file if inline ":asm:" or token ":paste:" */
 574     for (f = file; f && f->filename[0] == ':'; f = f->prev)
 575      ;
 576     if (f) {
 577         for(pf = s1->include_stack; pf < s1->include_stack_ptr; pf++)
 578             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 579                 (*pf)->filename, (*pf)->line_num);
 580         if (f->line_num > 0) {
 581             strcat_printf(buf, sizeof(buf), "%s:%d: ",
 582                 f->filename, f->line_num);
 583         } else {
 584             strcat_printf(buf, sizeof(buf), "%s: ",
 585                 f->filename);
 586         }
 587     } else {
 588         strcat_printf(buf, sizeof(buf), "tcc: ");
 589     }
 590     if (is_warning)
 591         strcat_printf(buf, sizeof(buf), "warning: ");
 592     else
 593         strcat_printf(buf, sizeof(buf), "error: ");
 594     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 595
 596     if (!s1->error_func) {
 597         /* default case: stderr */
 598         fprintf(stderr, "%s\n", buf);
 599     } else {
 600         s1->error_func(s1->error_opaque, buf);
 601     }
 602     if (!is_warning || s1->warn_error)
 603         s1->nb_errors++;
 604 }
 605
 606 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque,
 607                         void (*error_func)(void *opaque, const char *msg))
 608 {
 609     s->error_opaque = error_opaque;
 610     s->error_func = error_func;
 611 }
 612
 613 /* error without aborting current compilation */
 614 PUB_FUNC void tcc_error_noabort(const char *fmt, ...)
 615 {
 616     TCCState *s1 = tcc_state;
 617     va_list ap;
 618
 619     va_start(ap, fmt);
 620     error1(s1, 0, fmt, ap);
 621     va_end(ap);
 622 }
 623
 624 PUB_FUNC void tcc_error(const char *fmt, ...)
 625 {
 626     TCCState *s1 = tcc_state;
 627     va_list ap;
 628
 629     va_start(ap, fmt);
 630     error1(s1, 0, fmt, ap);
 631     va_end(ap);
 632     /* better than nothing: in some cases, we accept to handle errors */
 633     if (s1->error_set_jmp_enabled) {
 634         longjmp(s1->error_jmp_buf, 1);
 635     } else {
 636         /* XXX: eliminate this someday */
 637         exit(1);
 638     }
 639 }
 640
 641 PUB_FUNC void tcc_warning(const char *fmt, ...)
 642 {
 643     TCCState *s1 = tcc_state;
 644     va_list ap;
 645
 646     if (s1->warn_none)
 647         return;
 648
 649     va_start(ap, fmt);
 650     error1(s1, 1, fmt, ap);
 651     va_end(ap);
 652 }
 653
 654 /********************************************************/
 655 /* I/O layer */
 656
 657 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 658 {
 659     BufferedFile *bf;
 660     int buflen = initlen ? initlen : IO_BUF_SIZE;
 661
 662     bf = tcc_malloc(sizeof(BufferedFile) + buflen);
 663     bf->buf_ptr = bf->buffer;
 664     bf->buf_end = bf->buffer + initlen;
 665     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 666     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 667 #ifdef _WIN32
 668     normalize_slashes(bf->filename);
 669 #endif
 670     bf->line_num = 1;
 671     bf->ifndef_macro = 0;
 672     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 673     bf->fd = -1;
 674     bf->prev = file;
 675     file = bf;
 676 }
 677
 678 ST_FUNC void tcc_close(void)
 679 {
 680     BufferedFile *bf = file;
 681     if (bf->fd > 0) {
 682         close(bf->fd);
 683         total_lines += bf->line_num;
 684     }
 685     file = bf->prev;
 686     tcc_free(bf);
 687 }
 688
 689 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
 690 {
 691     int fd;
 692     if (strcmp(filename, "-") == 0)
 693         fd = 0, filename = "stdin";
 694     else
 695         fd = open(filename, O_RDONLY | O_BINARY);
 696     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 697         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 698                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 699     if (fd < 0)
 700         return -1;
 701
 702     tcc_open_bf(s1, filename, 0);
 703     file->fd = fd;
 704     return fd;
 705 }
 706
 707 /* compile the C file opened in 'file'. Return non zero if errors. */
 708 static int tcc_compile(TCCState *s1)
 709 {
 710     Sym *define_start;
 711     SValue *pvtop;
 712     char buf[512];
 713     volatile int section_sym;
 714
 715 #ifdef INC_DEBUG
 716     printf("%s: **** new file\n", file->filename);
 717 #endif
 718     preprocess_init(s1);
 719
 720     cur_text_section = NULL;
 721     funcname = "";
 722     anon_sym = SYM_FIRST_ANOM;
 723
 724     /* file info: full path + filename */
 725     section_sym = 0; /* avoid warning */
 726     if (s1->do_debug) {
 727         section_sym = put_elf_sym(symtab_section, 0, 0,
 728                                   ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
 729                                   text_section->sh_num, NULL);
 730         getcwd(buf, sizeof(buf));
 731 #ifdef _WIN32
 732         normalize_slashes(buf);
 733 #endif
 734         pstrcat(buf, sizeof(buf), "/");
 735         put_stabs_r(buf, N_SO, 0, 0,
 736                     text_section->data_offset, text_section, section_sym);
 737         put_stabs_r(file->filename, N_SO, 0, 0,
 738                     text_section->data_offset, text_section, section_sym);
 739     }
 740     /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
 741        symbols can be safely used */
 742     put_elf_sym(symtab_section, 0, 0,
 743                 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
 744                 SHN_ABS, file->filename);
 745
 746     /* define some often used types */
 747     int_type.t = VT_INT;
 748
 749     char_pointer_type.t = VT_BYTE;
 750     mk_pointer(&char_pointer_type);
 751
 752 #if PTR_SIZE == 4
 753     size_type.t = VT_INT;
 754 #else
 755     size_type.t = VT_LLONG;
 756 #endif
 757
 758     func_old_type.t = VT_FUNC;
 759     func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
 760 #ifdef TCC_TARGET_ARM
 761     arm_init_types();
 762 #endif
 763
 764 #if 0
 765     /* define 'void *alloca(unsigned int)' builtin function */
 766     {
 767         Sym *s1;
 768
 769         p = anon_sym++;
 770         sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
 771         s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
 772         s1->next = NULL;
 773         sym->next = s1;
 774         sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
 775     }
 776 #endif
 777
 778     define_start = define_stack;
 779     nocode_wanted = 1;
 780
 781     if (setjmp(s1->error_jmp_buf) == 0) {
 782         s1->nb_errors = 0;
 783         s1->error_set_jmp_enabled = 1;
 784
 785         ch = file->buf_ptr[0];
 786         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 787         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
 788         pvtop = vtop;
 789         next();
 790         decl(VT_CONST);
 791         if (tok != TOK_EOF)
 792             expect("declaration");
 793         if (pvtop != vtop)
 794             tcc_warning("internal compiler error: vstack leak? (%d)", vtop - pvtop);
 795
 796         /* end of translation unit info */
 797         if (s1->do_debug) {
 798             put_stabs_r(NULL, N_SO, 0, 0,
 799                         text_section->data_offset, text_section, section_sym);
 800         }
 801     }
 802
 803     s1->error_set_jmp_enabled = 0;
 804
 805     /* reset define stack, but leave -Dsymbols (may be incorrect if
 806        they are undefined) */
 807     free_defines(define_start);
 808
 809     gen_inline_functions();
 810
 811     sym_pop(&global_stack, NULL);
 812     sym_pop(&local_stack, NULL);
 813
 814     return s1->nb_errors != 0 ? -1 : 0;
 815 }
 816
 817 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 818 {
 819     int len, ret;
 820     len = strlen(str);
 821
 822     tcc_open_bf(s, "<string>", len);
 823     memcpy(file->buffer, str, len);
 824     ret = tcc_compile(s);
 825     tcc_close();
 826     return ret;
 827 }
 828
 829 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
 830 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 831 {
 832     int len1, len2;
 833     /* default value */
 834     if (!value)
 835         value = "1";
 836     len1 = strlen(sym);
 837     len2 = strlen(value);
 838
 839     /* init file structure */
 840     tcc_open_bf(s1, "<define>", len1 + len2 + 1);
 841     memcpy(file->buffer, sym, len1);
 842     file->buffer[len1] = ' ';
 843     memcpy(file->buffer + len1 + 1, value, len2);
 844
 845     /* parse with define parser */
 846     ch = file->buf_ptr[0];
 847     next_nomacro();
 848     parse_define();
 849
 850     tcc_close();
 851 }
 852
 853 /* undefine a preprocessor symbol */
 854 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 855 {
 856     TokenSym *ts;
 857     Sym *s;
 858     ts = tok_alloc(sym, strlen(sym));
 859     s = define_find(ts->tok);
 860     /* undefine symbol by putting an invalid name */
 861     if (s)
 862         define_undef(s);
 863 }
 864
 865 /* cleanup all static data used during compilation */
 866 static void tcc_cleanup(void)
 867 {
 868     int i, n;
 869     if (NULL == tcc_state)
 870         return;
 871     tcc_state = NULL;
 872
 873     /* free -D defines */
 874     free_defines(NULL);
 875
 876     /* free tokens */
 877     n = tok_ident - TOK_IDENT;
 878     for(i = 0; i < n; i++)
 879         tcc_free(table_ident[i]);
 880     tcc_free(table_ident);
 881
 882     /* free sym_pools */
 883     dynarray_reset(&sym_pools, &nb_sym_pools);
 884     /* string buffer */
 885     cstr_free(&tokcstr);
 886     /* reset symbol stack */
 887     sym_free_first = NULL;
 888     /* cleanup from error/setjmp */
 889     macro_ptr = NULL;
 890 }
 891
 892 LIBTCCAPI TCCState *tcc_new(void)
 893 {
 894     TCCState *s;
 895     char buffer[100];
 896     int a,b,c;
 897
 898     tcc_cleanup();
 899
 900     s = tcc_mallocz(sizeof(TCCState));
 901     if (!s)
 902         return NULL;
 903     tcc_state = s;
 904 #ifdef _WIN32
 905     tcc_set_lib_path_w32(s);
 906 #else
 907     tcc_set_lib_path(s, CONFIG_TCCDIR);
 908 #endif
 909     s->output_type = TCC_OUTPUT_MEMORY;
 910     preprocess_new();
 911     s->include_stack_ptr = s->include_stack;
 912
 913     /* we add dummy defines for some special macros to speed up tests
 914        and to have working defined() */
 915     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
 916     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
 917     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
 918     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
 919
 920     /* define __TINYC__ 92X  */
 921     sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
 922     sprintf(buffer, "%d", a*10000 + b*100 + c);
 923     tcc_define_symbol(s, "__TINYC__", buffer);
 924
 925     /* standard defines */
 926     tcc_define_symbol(s, "__STDC__", NULL);
 927     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 928     tcc_define_symbol(s, "__STDC_HOSTED__", NULL);
 929
 930     /* target defines */
 931 #if defined(TCC_TARGET_I386)
 932     tcc_define_symbol(s, "__i386__", NULL);
 933     tcc_define_symbol(s, "__i386", NULL);
 934     tcc_define_symbol(s, "i386", NULL);
 935 #elif defined(TCC_TARGET_X86_64)
 936     tcc_define_symbol(s, "__x86_64__", NULL);
 937 #elif defined(TCC_TARGET_ARM)
 938     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 939     tcc_define_symbol(s, "__arm_elf__", NULL);
 940     tcc_define_symbol(s, "__arm_elf", NULL);
 941     tcc_define_symbol(s, "arm_elf", NULL);
 942     tcc_define_symbol(s, "__arm__", NULL);
 943     tcc_define_symbol(s, "__arm", NULL);
 944     tcc_define_symbol(s, "arm", NULL);
 945     tcc_define_symbol(s, "__APCS_32__", NULL);
 946 #endif
 947
 948 #ifdef TCC_TARGET_PE
 949     tcc_define_symbol(s, "_WIN32", NULL);
 950 # ifdef TCC_TARGET_X86_64
 951     tcc_define_symbol(s, "_WIN64", NULL);
 952 # endif
 953 #else
 954     tcc_define_symbol(s, "__unix__", NULL);
 955     tcc_define_symbol(s, "__unix", NULL);
 956     tcc_define_symbol(s, "unix", NULL);
 957 # if defined(__linux)
 958     tcc_define_symbol(s, "__linux__", NULL);
 959     tcc_define_symbol(s, "__linux", NULL);
 960 # endif
 961 # if defined(__FreeBSD__)
 962 #  define str(s) #s
 963     tcc_define_symbol(s, "__FreeBSD__", str( __FreeBSD__));
 964 #  undef str
 965 # endif
 966 # if defined(__FreeBSD_kernel__)
 967     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
 968 # endif
 969 #endif
 970
 971     /* TinyCC & gcc defines */
 972 #if defined TCC_TARGET_PE && defined TCC_TARGET_X86_64
 973     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
 974     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
 975 #else
 976     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 977     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 978 #endif
 979
 980 #ifdef TCC_TARGET_PE
 981     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
 982 #else
 983     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
 984 #endif
 985
 986 #ifndef TCC_TARGET_PE
 987     /* glibc defines */
 988     tcc_define_symbol(s, "__REDIRECT(name, proto, alias)", "name proto __asm__ (#alias)");
 989     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)", "name proto __asm__ (#alias) __THROW");
 990     /* default library paths */
 991     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
 992     /* paths for crt objects */
 993     tcc_split_path(s, (void ***)&s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
 994 #endif
 995
 996     /* no section zero */
 997     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
 998
 999     /* create standard sections */
1000     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
1001     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
1002     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
1003
1004     /* symbols are always generated for linking stage */
1005     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
1006                                 ".strtab",
1007                                 ".hashtab", SHF_PRIVATE);
1008     strtab_section = symtab_section->link;
1009     s->symtab = symtab_section;
1010
1011     /* private symbol table for dynamic symbols */
1012     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
1013                                       ".dynstrtab",
1014                                       ".dynhashtab", SHF_PRIVATE);
1015     s->alacarte_link = 1;
1016     s->nocommon = 1;
1017     s->section_align = ELF_PAGE_SIZE;
1018
1019 #ifdef CHAR_IS_UNSIGNED
1020     s->char_is_unsigned = 1;
1021 #endif
1022     /* enable this if you want symbols with leading underscore on windows: */
1023 #if 0 /* def TCC_TARGET_PE */
1024     s->leading_underscore = 1;
1025 #endif
1026 #ifdef TCC_TARGET_I386
1027     s->seg_size = 32;
1028 #endif
1029     return s;
1030 }
1031
1032 LIBTCCAPI void tcc_delete(TCCState *s1)
1033 {
1034     int i;
1035
1036     tcc_cleanup();
1037
1038     /* free all sections */
1039     for(i = 1; i < s1->nb_sections; i++)
1040         free_section(s1->sections[i]);
1041     dynarray_reset(&s1->sections, &s1->nb_sections);
1042
1043     for(i = 0; i < s1->nb_priv_sections; i++)
1044         free_section(s1->priv_sections[i]);
1045     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1046
1047     /* free any loaded DLLs */
1048     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1049         DLLReference *ref = s1->loaded_dlls[i];
1050         if ( ref->handle )
1051             dlclose(ref->handle);
1052     }
1053
1054     /* free loaded dlls array */
1055     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1056
1057     /* free library paths */
1058     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1059     dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
1060
1061     /* free include paths */
1062     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1063     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1064     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1065
1066     tcc_free(s1->tcc_lib_path);
1067     tcc_free(s1->soname);
1068     tcc_free(s1->rpath);
1069     tcc_free(s1->init_symbol);
1070     tcc_free(s1->fini_symbol);
1071     tcc_free(s1->outfile);
1072     tcc_free(s1->deps_outfile);
1073     dynarray_reset(&s1->files, &s1->nb_files);
1074     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
1075
1076 #ifdef TCC_IS_NATIVE
1077 # ifdef HAVE_SELINUX
1078     munmap (s1->write_mem, s1->mem_size);
1079     munmap (s1->runtime_mem, s1->mem_size);
1080 # else
1081     tcc_free(s1->runtime_mem);
1082 # endif
1083 #endif
1084
1085     tcc_free(s1);
1086 }
1087
1088 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
1089 {
1090     tcc_split_path(s, (void ***)&s->include_paths, &s->nb_include_paths, pathname);
1091     return 0;
1092 }
1093
1094 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
1095 {
1096     tcc_split_path(s, (void ***)&s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
1097     return 0;
1098 }
1099
1100 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1101 {
1102     const char *ext;
1103     ElfW(Ehdr) ehdr;
1104     int fd, ret, size;
1105
1106     /* find source file type with extension */
1107     ext = tcc_fileextension(filename);
1108     if (ext[0])
1109         ext++;
1110
1111 #ifdef CONFIG_TCC_ASM
1112     /* if .S file, define __ASSEMBLER__ like gcc does */
1113     if (!strcmp(ext, "S"))
1114         tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
1115 #endif
1116
1117     /* open the file */
1118     ret = tcc_open(s1, filename);
1119     if (ret < 0) {
1120         if (flags & AFF_PRINT_ERROR)
1121             tcc_error_noabort("file '%s' not found", filename);
1122         return ret;
1123     }
1124
1125     /* update target deps */
1126     dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1127             tcc_strdup(filename));
1128
1129     if (flags & AFF_PREPROCESS) {
1130         ret = tcc_preprocess(s1);
1131         goto the_end;
1132     }
1133
1134     if (!ext[0] || !PATHCMP(ext, "c")) {
1135         /* C file assumed */
1136         ret = tcc_compile(s1);
1137         goto the_end;
1138     }
1139
1140 #ifdef CONFIG_TCC_ASM
1141     if (!strcmp(ext, "S")) {
1142         /* preprocessed assembler */
1143         ret = tcc_assemble(s1, 1);
1144         goto the_end;
1145     }
1146
1147     if (!strcmp(ext, "s")) {
1148         /* non preprocessed assembler */
1149         ret = tcc_assemble(s1, 0);
1150         goto the_end;
1151     }
1152 #endif
1153
1154     fd = file->fd;
1155     /* assume executable format: auto guess file type */
1156     size = read(fd, &ehdr, sizeof(ehdr));
1157     lseek(fd, 0, SEEK_SET);
1158     if (size <= 0) {
1159         tcc_error_noabort("could not read header");
1160         goto the_end;
1161     }
1162
1163     if (size == sizeof(ehdr) &&
1164         ehdr.e_ident[0] == ELFMAG0 &&
1165         ehdr.e_ident[1] == ELFMAG1 &&
1166         ehdr.e_ident[2] == ELFMAG2 &&
1167         ehdr.e_ident[3] == ELFMAG3) {
1168
1169         /* do not display line number if error */
1170         file->line_num = 0;
1171         if (ehdr.e_type == ET_REL) {
1172             ret = tcc_load_object_file(s1, fd, 0);
1173             goto the_end;
1174
1175         }
1176 #ifndef TCC_TARGET_PE
1177         if (ehdr.e_type == ET_DYN) {
1178             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1179 #ifdef TCC_IS_NATIVE
1180                 void *h;
1181                 h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1182                 if (h)
1183 #endif
1184                     ret = 0;
1185             } else {
1186                 ret = tcc_load_dll(s1, fd, filename,
1187                                    (flags & AFF_REFERENCED_DLL) != 0);
1188             }
1189             goto the_end;
1190         }
1191 #endif
1192         tcc_error_noabort("unrecognized ELF file");
1193         goto the_end;
1194     }
1195
1196     if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
1197         file->line_num = 0; /* do not display line number if error */
1198         ret = tcc_load_archive(s1, fd);
1199         goto the_end;
1200     }
1201
1202 #ifdef TCC_TARGET_COFF
1203     if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
1204         ret = tcc_load_coff(s1, fd);
1205         goto the_end;
1206     }
1207 #endif
1208
1209 #ifdef TCC_TARGET_PE
1210     ret = pe_load_file(s1, filename, fd);
1211 #else
1212     /* as GNU ld, consider it is an ld script if not recognized */
1213     ret = tcc_load_ldscript(s1);
1214 #endif
1215     if (ret < 0)
1216         tcc_error_noabort("unrecognized file type");
1217
1218 the_end:
1219     tcc_close();
1220     return ret;
1221 }
1222
1223 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1224 {
1225     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1226         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS);
1227     else
1228         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR);
1229 }
1230
1231 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1232 {
1233     tcc_split_path(s, (void ***)&s->library_paths, &s->nb_library_paths, pathname);
1234     return 0;
1235 }
1236
1237 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1238     const char *filename, int flags, char **paths, int nb_paths)
1239 {
1240     char buf[1024];
1241     int i;
1242
1243     for(i = 0; i < nb_paths; i++) {
1244         snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1245         if (tcc_add_file_internal(s, buf, flags) == 0)
1246             return 0;
1247     }
1248     return -1;
1249 }
1250
1251 /* find and load a dll. Return non zero if not found */
1252 /* XXX: add '-rpath' option support ? */
1253 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1254 {
1255     return tcc_add_library_internal(s, "%s/%s", filename, flags,
1256         s->library_paths, s->nb_library_paths);
1257 }
1258
1259 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename)
1260 {
1261     if (-1 == tcc_add_library_internal(s, "%s/%s",
1262         filename, 0, s->crt_paths, s->nb_crt_paths))
1263         tcc_error_noabort("file '%s' not found", filename);
1264     return 0;
1265 }
1266
1267 /* the library name is the same as the argument of the '-l' option */
1268 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1269 {
1270 #ifdef TCC_TARGET_PE
1271     const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1272     const char **pp = s->static_link ? libs + 4 : libs;
1273 #else
1274     const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1275     const char **pp = s->static_link ? libs + 1 : libs;
1276 #endif
1277     while (*pp) {
1278         if (0 == tcc_add_library_internal(s, *pp,
1279             libraryname, 0, s->library_paths, s->nb_library_paths))
1280             return 0;
1281         ++pp;
1282     }
1283     return -1;
1284 }
1285
1286 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1287 {
1288 #ifdef TCC_TARGET_PE
1289     /* On x86_64 'val' might not be reachable with a 32bit offset.
1290        So it is handled here as if it were in a DLL. */
1291     pe_putimport(s, 0, name, (uintptr_t)val);
1292 #else
1293     /* XXX: Same problem on linux but currently "solved" elsewhere
1294        via the rather dirty 'runtime_plt_and_got' hack. */
1295     add_elf_sym(symtab_section, (uintptr_t)val, 0,
1296         ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1297         SHN_ABS, name);
1298 #endif
1299     return 0;
1300 }
1301
1302 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
1303 {
1304     s->output_type = output_type;
1305
1306     if (!s->nostdinc) {
1307         /* default include paths */
1308         /* -isystem paths have already been handled */
1309         tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
1310     }
1311
1312     /* if bound checking, then add corresponding sections */
1313 #ifdef CONFIG_TCC_BCHECK
1314     if (s->do_bounds_check) {
1315         /* define symbol */
1316         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1317         /* create bounds sections */
1318         bounds_section = new_section(s, ".bounds",
1319                                      SHT_PROGBITS, SHF_ALLOC);
1320         lbounds_section = new_section(s, ".lbounds",
1321                                       SHT_PROGBITS, SHF_ALLOC);
1322     }
1323 #endif
1324
1325     if (s->char_is_unsigned) {
1326         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
1327     }
1328
1329     /* add debug sections */
1330     if (s->do_debug) {
1331         /* stab symbols */
1332         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
1333         stab_section->sh_entsize = sizeof(Stab_Sym);
1334         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
1335         put_elf_str(stabstr_section, "");
1336         stab_section->link = stabstr_section;
1337         /* put first entry */
1338         put_stabs("", 0, 0, 0, 0);
1339     }
1340
1341 #ifdef TCC_TARGET_PE
1342     tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
1343 # ifdef _WIN32
1344     tcc_add_systemdir(s);
1345 # endif
1346 #else
1347     /* add libc crt1/crti objects */
1348     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1349         !s->nostdlib) {
1350         if (output_type != TCC_OUTPUT_DLL)
1351             tcc_add_crt(s, "crt1.o");
1352         tcc_add_crt(s, "crti.o");
1353     }
1354 #endif
1355     return 0;
1356 }
1357
1358 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1359 {
1360     tcc_free(s->tcc_lib_path);
1361     s->tcc_lib_path = tcc_strdup(path);
1362 }
1363
1364 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1365 #define FD_INVERT 0x0002 /* invert value before storing */
1366
1367 typedef struct FlagDef {
1368     uint16_t offset;
1369     uint16_t flags;
1370     const char *name;
1371 } FlagDef;
1372
1373 static const FlagDef warning_defs[] = {
1374     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1375     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1376     { offsetof(TCCState, warn_error), 0, "error" },
1377     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1378       "implicit-function-declaration" },
1379 };
1380
1381 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1382                     const char *name, int value)
1383 {
1384     int i;
1385     const FlagDef *p;
1386     const char *r;
1387
1388     r = name;
1389     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
1390         r += 3;
1391         value = !value;
1392     }
1393     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1394         if (!strcmp(r, p->name))
1395             goto found;
1396     }
1397     return -1;
1398  found:
1399     if (p->flags & FD_INVERT)
1400         value = !value;
1401     *(int *)((uint8_t *)s + p->offset) = value;
1402     return 0;
1403 }
1404
1405 /* set/reset a warning */
1406 static int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1407 {
1408     int i;
1409     const FlagDef *p;
1410
1411     if (!strcmp(warning_name, "all")) {
1412         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1413             if (p->flags & WD_ALL)
1414                 *(int *)((uint8_t *)s + p->offset) = 1;
1415         }
1416         return 0;
1417     } else {
1418         return set_flag(s, warning_defs, countof(warning_defs),
1419                         warning_name, value);
1420     }
1421 }
1422
1423 static const FlagDef flag_defs[] = {
1424     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1425     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1426     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1427     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1428 };
1429
1430 /* set/reset a flag */
1431 static int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1432 {
1433     return set_flag(s, flag_defs, countof(flag_defs),
1434                     flag_name, value);
1435 }
1436
1437
1438 static int strstart(const char *val, const char **str)
1439 {
1440     const char *p, *q;
1441     p = *str;
1442     q = val;
1443     while (*q) {
1444         if (*p != *q)
1445             return 0;
1446         p++;
1447         q++;
1448     }
1449     *str = p;
1450     return 1;
1451 }
1452
1453 /* Like strstart, but automatically takes into account that ld options can
1454  *
1455  * - start with double or single dash (e.g. '--soname' or '-soname')
1456  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1457  *   or '-Wl,-soname=x.so')
1458  *
1459  * you provide `val` always in 'option[=]' form (no leading -)
1460  */
1461 static int link_option(const char *str, const char *val, const char **ptr)
1462 {
1463     const char *p, *q;
1464
1465     /* there should be 1 or 2 dashes */
1466     if (*str++ != '-')
1467         return 0;
1468     if (*str == '-')
1469         str++;
1470
1471     /* then str & val should match (potentialy up to '=') */
1472     p = str;
1473     q = val;
1474
1475     while (*q != '\0' && *q != '=') {
1476         if (*p != *q)
1477             return 0;
1478         p++;
1479         q++;
1480     }
1481
1482     /* '=' near eos means ',' or '=' is ok */
1483     if (*q == '=') {
1484         if (*p != ',' && *p != '=')
1485             return 0;
1486         p++;
1487         q++;
1488     }
1489
1490     if (ptr)
1491         *ptr = p;
1492     return 1;
1493 }
1494
1495 static const char *skip_linker_arg(const char **str)
1496 {
1497     const char *s1 = *str;
1498     const char *s2 = strchr(s1, ',');
1499     *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1500     return s2;
1501 }
1502
1503 static char *copy_linker_arg(const char *p)
1504 {
1505     const char *q = p;
1506     skip_linker_arg(&q);
1507     return pstrncpy(tcc_malloc(q - p + 1), p, q - p);
1508 }
1509
1510 /* set linker options */
1511 static int tcc_set_linker(TCCState *s, const char *option)
1512 {
1513     while (option && *option) {
1514
1515         const char *p = option;
1516         char *end = NULL;
1517         int ignoring = 0;
1518
1519         if (link_option(option, "Bsymbolic", &p)) {
1520             s->symbolic = 1;
1521         } else if (link_option(option, "nostdlib", &p)) {
1522             s->nostdlib = 1;
1523         } else if (link_option(option, "fini=", &p)) {
1524             s->fini_symbol = copy_linker_arg(p);
1525             ignoring = 1;
1526         } else if (link_option(option, "image-base=", &p)
1527                 || link_option(option, "Ttext=", &p)) {
1528             s->text_addr = strtoull(p, &end, 16);
1529             s->has_text_addr = 1;
1530         } else if (link_option(option, "init=", &p)) {
1531             s->init_symbol = copy_linker_arg(p);
1532             ignoring = 1;
1533         } else if (link_option(option, "oformat=", &p)) {
1534 #if defined(TCC_TARGET_PE)
1535             if (strstart("pe-", &p)) {
1536 #elif defined(TCC_TARGET_X86_64)
1537             if (strstart("elf64-", &p)) {
1538 #else
1539             if (strstart("elf32-", &p)) {
1540 #endif
1541                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1542             } else if (!strcmp(p, "binary")) {
1543                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1544 #ifdef TCC_TARGET_COFF
1545             } else if (!strcmp(p, "coff")) {
1546                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1547 #endif
1548             } else
1549                 goto err;
1550
1551         } else if (link_option(option, "rpath=", &p)) {
1552             s->rpath = copy_linker_arg(p);
1553         } else if (link_option(option, "section-alignment=", &p)) {
1554             s->section_align = strtoul(p, &end, 16);
1555         } else if (link_option(option, "soname=", &p)) {
1556             s->soname = copy_linker_arg(p);
1557 #ifdef TCC_TARGET_PE
1558         } else if (link_option(option, "file-alignment=", &p)) {
1559             s->pe_file_align = strtoul(p, &end, 16);
1560         } else if (link_option(option, "stack=", &p)) {
1561             s->pe_stack_size = strtoul(p, &end, 10);
1562         } else if (link_option(option, "subsystem=", &p)) {
1563 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1564             if (!strcmp(p, "native")) {
1565                 s->pe_subsystem = 1;
1566             } else if (!strcmp(p, "console")) {
1567                 s->pe_subsystem = 3;
1568             } else if (!strcmp(p, "gui")) {
1569                 s->pe_subsystem = 2;
1570             } else if (!strcmp(p, "posix")) {
1571                 s->pe_subsystem = 7;
1572             } else if (!strcmp(p, "efiapp")) {
1573                 s->pe_subsystem = 10;
1574             } else if (!strcmp(p, "efiboot")) {
1575                 s->pe_subsystem = 11;
1576             } else if (!strcmp(p, "efiruntime")) {
1577                 s->pe_subsystem = 12;
1578             } else if (!strcmp(p, "efirom")) {
1579                 s->pe_subsystem = 13;
1580 #elif defined(TCC_TARGET_ARM)
1581             if (!strcmp(p, "wince")) {
1582                 s->pe_subsystem = 9;
1583 #endif
1584             } else
1585                 goto err;
1586 #endif
1587         } else
1588             goto err;
1589
1590         if (ignoring && s->warn_unsupported) err: {
1591             char buf[100], *e;
1592             pstrcpy(buf, sizeof buf, e = copy_linker_arg(option)), tcc_free(e);
1593             if (ignoring)
1594                 tcc_warning("unsupported linker option '%s'", buf);
1595             else
1596                 tcc_error("unsupported linker option '%s'", buf);
1597         }
1598         option = skip_linker_arg(&p);
1599     }
1600     return 0;
1601 }
1602
1603 typedef struct TCCOption {
1604     const char *name;
1605     uint16_t index;
1606     uint16_t flags;
1607 } TCCOption;
1608
1609 enum {
1610     TCC_OPTION_HELP,
1611     TCC_OPTION_I,
1612     TCC_OPTION_D,
1613     TCC_OPTION_U,
1614     TCC_OPTION_L,
1615     TCC_OPTION_B,
1616     TCC_OPTION_l,
1617     TCC_OPTION_bench,
1618     TCC_OPTION_bt,
1619     TCC_OPTION_b,
1620     TCC_OPTION_g,
1621     TCC_OPTION_c,
1622     TCC_OPTION_static,
1623     TCC_OPTION_shared,
1624     TCC_OPTION_soname,
1625     TCC_OPTION_o,
1626     TCC_OPTION_r,
1627     TCC_OPTION_s,
1628     TCC_OPTION_Wl,
1629     TCC_OPTION_W,
1630     TCC_OPTION_O,
1631     TCC_OPTION_m,
1632     TCC_OPTION_f,
1633     TCC_OPTION_isystem,
1634     TCC_OPTION_nostdinc,
1635     TCC_OPTION_nostdlib,
1636     TCC_OPTION_print_search_dirs,
1637     TCC_OPTION_rdynamic,
1638     TCC_OPTION_pedantic,
1639     TCC_OPTION_pthread,
1640     TCC_OPTION_run,
1641     TCC_OPTION_v,
1642     TCC_OPTION_w,
1643     TCC_OPTION_pipe,
1644     TCC_OPTION_E,
1645     TCC_OPTION_MD,
1646     TCC_OPTION_MF,
1647     TCC_OPTION_x,
1648     TCC_OPTION_dumpversion,
1649 };
1650
1651 #define TCC_OPTION_HAS_ARG 0x0001
1652 #define TCC_OPTION_NOSEP   0x0002 /* cannot have space before option and arg */
1653
1654 static const TCCOption tcc_options[] = {
1655     { "h", TCC_OPTION_HELP, 0 },
1656     { "-help", TCC_OPTION_HELP, 0 },
1657     { "?", TCC_OPTION_HELP, 0 },
1658     { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1659     { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1660     { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1661     { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1662     { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1663     { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1664     { "bench", TCC_OPTION_bench, 0 },
1665 #ifdef CONFIG_TCC_BACKTRACE
1666     { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
1667 #endif
1668 #ifdef CONFIG_TCC_BCHECK
1669     { "b", TCC_OPTION_b, 0 },
1670 #endif
1671     { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1672     { "c", TCC_OPTION_c, 0 },
1673     { "static", TCC_OPTION_static, 0 },
1674     { "shared", TCC_OPTION_shared, 0 },
1675     { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
1676     { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
1677     { "pedantic", TCC_OPTION_pedantic, 0},
1678     { "pthread", TCC_OPTION_pthread, 0},
1679     { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1680     { "rdynamic", TCC_OPTION_rdynamic, 0 },
1681     { "r", TCC_OPTION_r, 0 },
1682     { "s", TCC_OPTION_s, 0 },
1683     { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1684     { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1685     { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1686     { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG },
1687     { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1688     { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
1689     { "nostdinc", TCC_OPTION_nostdinc, 0 },
1690     { "nostdlib", TCC_OPTION_nostdlib, 0 },
1691     { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
1692     { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1693     { "w", TCC_OPTION_w, 0 },
1694     { "pipe", TCC_OPTION_pipe, 0},
1695     { "E", TCC_OPTION_E, 0},
1696     { "MD", TCC_OPTION_MD, 0},
1697     { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
1698     { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
1699     { "dumpversion", TCC_OPTION_dumpversion, 0},
1700     { NULL, 0, 0 },
1701 };
1702
1703 static void parse_option_D(TCCState *s1, const char *optarg)
1704 {
1705     char *sym = tcc_strdup(optarg);
1706     char *value = strchr(sym, '=');
1707     if (value)
1708         *value++ = '\0';
1709     tcc_define_symbol(s1, sym, value);
1710     tcc_free(sym);
1711 }
1712
1713 PUB_FUNC int tcc_parse_args(TCCState *s, int argc, char **argv)
1714 {
1715     const TCCOption *popt;
1716     const char *optarg, *r;
1717     int run = 0;
1718     int pthread = 0;
1719     int optind = 0;
1720
1721     /* collect -Wl options for input such as "-Wl,-rpath -Wl,<path>" */
1722     CString linker_arg;
1723     cstr_new(&linker_arg);
1724
1725     while (optind < argc) {
1726
1727         r = argv[optind++];
1728         if (r[0] != '-' || r[1] == '\0') {
1729             /* add a new file */
1730             dynarray_add((void ***)&s->files, &s->nb_files, tcc_strdup(r));
1731             if (run) {
1732                 optind--;
1733                 /* argv[0] will be this file */
1734                 break;
1735             }
1736             continue;
1737         }
1738
1739         /* find option in table */
1740         for(popt = tcc_options; ; ++popt) {
1741             const char *p1 = popt->name;
1742             const char *r1 = r + 1;
1743             if (p1 == NULL)
1744                 tcc_error("invalid option -- '%s'", r);
1745             if (!strstart(p1, &r1))
1746                 continue;
1747             optarg = r1;
1748             if (popt->flags & TCC_OPTION_HAS_ARG) {
1749                 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
1750                     if (optind >= argc)
1751                         tcc_error("argument to '%s' is missing", r);
1752                     optarg = argv[optind++];
1753                 }
1754             } else if (*r1 != '\0')
1755                 continue;
1756             break;
1757         }
1758
1759         switch(popt->index) {
1760         case TCC_OPTION_HELP:
1761             return 0;
1762         case TCC_OPTION_I:
1763             if (tcc_add_include_path(s, optarg) < 0)
1764                 tcc_error("too many include paths");
1765             break;
1766         case TCC_OPTION_D:
1767             parse_option_D(s, optarg);
1768             break;
1769         case TCC_OPTION_U:
1770             tcc_undefine_symbol(s, optarg);
1771             break;
1772         case TCC_OPTION_L:
1773             tcc_add_library_path(s, optarg);
1774             break;
1775         case TCC_OPTION_B:
1776             /* set tcc utilities path (mainly for tcc development) */
1777             tcc_set_lib_path(s, optarg);
1778             break;
1779         case TCC_OPTION_l:
1780             dynarray_add((void ***)&s->files, &s->nb_files, tcc_strdup(r));
1781             s->nb_libraries++;
1782             break;
1783         case TCC_OPTION_pthread:
1784             parse_option_D(s, "_REENTRANT");
1785             pthread = 1;
1786             break;
1787         case TCC_OPTION_bench:
1788             s->do_bench = 1;
1789             break;
1790 #ifdef CONFIG_TCC_BACKTRACE
1791         case TCC_OPTION_bt:
1792             tcc_set_num_callers(atoi(optarg));
1793             break;
1794 #endif
1795 #ifdef CONFIG_TCC_BCHECK
1796         case TCC_OPTION_b:
1797             s->do_bounds_check = 1;
1798             s->do_debug = 1;
1799             break;
1800 #endif
1801         case TCC_OPTION_g:
1802             s->do_debug = 1;
1803             break;
1804         case TCC_OPTION_c:
1805             s->output_type = TCC_OUTPUT_OBJ;
1806             break;
1807         case TCC_OPTION_static:
1808             s->static_link = 1;
1809             break;
1810         case TCC_OPTION_shared:
1811             s->output_type = TCC_OUTPUT_DLL;
1812             break;
1813         case TCC_OPTION_soname:
1814             s->soname = tcc_strdup(optarg);
1815             break;
1816         case TCC_OPTION_m:
1817             s->option_m = tcc_strdup(optarg);
1818             break;
1819         case TCC_OPTION_o:
1820             s->outfile = tcc_strdup(optarg);
1821             break;
1822         case TCC_OPTION_r:
1823             /* generate a .o merging several output files */
1824             s->option_r = 1;
1825             s->output_type = TCC_OUTPUT_OBJ;
1826             break;
1827         case TCC_OPTION_isystem:
1828             tcc_add_sysinclude_path(s, optarg);
1829             break;
1830         case TCC_OPTION_nostdinc:
1831             s->nostdinc = 1;
1832             break;
1833         case TCC_OPTION_nostdlib:
1834             s->nostdlib = 1;
1835             break;
1836         case TCC_OPTION_print_search_dirs:
1837             s->print_search_dirs = 1;
1838             break;
1839         case TCC_OPTION_run:
1840             s->output_type = TCC_OUTPUT_MEMORY;
1841             tcc_set_options(s, optarg);
1842             run = 1;
1843             break;
1844         case TCC_OPTION_v:
1845             do ++s->verbose; while (*optarg++ == 'v');
1846             break;
1847         case TCC_OPTION_f:
1848             if (tcc_set_flag(s, optarg, 1) < 0 && s->warn_unsupported)
1849                 goto unsupported_option;
1850             break;
1851         case TCC_OPTION_W:
1852             if (tcc_set_warning(s, optarg, 1) < 0 &&
1853                 s->warn_unsupported)
1854                 goto unsupported_option;
1855             break;
1856         case TCC_OPTION_w:
1857             s->warn_none = 1;
1858             break;
1859         case TCC_OPTION_rdynamic:
1860             s->rdynamic = 1;
1861             break;
1862         case TCC_OPTION_Wl:
1863             if (linker_arg.size)
1864                 --linker_arg.size, cstr_ccat(&linker_arg, ',');
1865             cstr_cat(&linker_arg, optarg);
1866             cstr_ccat(&linker_arg, '\0');
1867             break;
1868         case TCC_OPTION_E:
1869             s->output_type = TCC_OUTPUT_PREPROCESS;
1870             break;
1871         case TCC_OPTION_MD:
1872             s->gen_deps = 1;
1873             break;
1874         case TCC_OPTION_MF:
1875             s->deps_outfile = tcc_strdup(optarg);
1876             break;
1877         case TCC_OPTION_dumpversion:
1878             printf ("%s\n", TCC_VERSION);
1879             exit(0);
1880         case TCC_OPTION_O:
1881         case TCC_OPTION_pedantic:
1882         case TCC_OPTION_pipe:
1883         case TCC_OPTION_s:
1884         case TCC_OPTION_x:
1885             /* ignored */
1886             break;
1887         default:
1888             if (s->warn_unsupported) {
1889             unsupported_option:
1890                 tcc_warning("unsupported option '%s'", r);
1891             }
1892             break;
1893         }
1894     }
1895
1896     if (pthread && s->output_type != TCC_OUTPUT_OBJ)
1897         tcc_set_options(s, "-lpthread");
1898
1899     tcc_set_linker(s, (const char *)linker_arg.data);
1900     cstr_free(&linker_arg);
1901
1902     return optind;
1903 }
1904
1905 LIBTCCAPI int tcc_set_options(TCCState *s, const char *str)
1906 {
1907     const char *s1;
1908     char **argv, *arg;
1909     int argc, len;
1910     int ret;
1911
1912     argc = 0, argv = NULL;
1913     for(;;) {
1914         while (is_space(*str))
1915             str++;
1916         if (*str == '\0')
1917             break;
1918         s1 = str;
1919         while (*str != '\0' && !is_space(*str))
1920             str++;
1921         len = str - s1;
1922         arg = tcc_malloc(len + 1);
1923         pstrncpy(arg, s1, len);
1924         dynarray_add((void ***)&argv, &argc, arg);
1925     }
1926     ret = tcc_parse_args(s, argc, argv);
1927     dynarray_reset(&argv, &argc);
1928     return ret;
1929 }
1930
1931 PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time)
1932 {
1933     double tt;
1934     tt = (double)total_time / 1000000.0;
1935     if (tt < 0.001)
1936         tt = 0.001;
1937     if (total_bytes < 1)
1938         total_bytes = 1;
1939     printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
1940            tok_ident - TOK_IDENT, total_lines, total_bytes,
1941            tt, (int)(total_lines / tt),
1942            total_bytes / tt / 1000000.0);
1943 }
1944
1945 PUB_FUNC void tcc_set_environment(TCCState *s)
1946 {
1947     char * path;
1948
1949     path = getenv("C_INCLUDE_PATH");
1950     if(path != NULL) {
1951         tcc_add_include_path(s, path);
1952     }
1953     path = getenv("CPATH");
1954     if(path != NULL) {
1955         tcc_add_include_path(s, path);
1956     }
1957     path = getenv("LIBRARY_PATH");
1958     if(path != NULL) {
1959         tcc_add_library_path(s, path);
1960     }
1961 }