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 #ifdef CONFIG_TCC_BACKTRACE
  36 ST_DATA int num_callers = 6;
  37 ST_DATA const char **rt_bound_error_msg;
  38 ST_DATA void *rt_prog_main;
  39 #endif
  40
  41 /********************************************************/
  42
  43 #ifndef NOTALLINONE
  44 #include "tccpp.c"
  45 #include "tccgen.c"
  46 #include "tccelf.c"
  47 #include "tccrun.c"
  48 #ifdef TCC_TARGET_I386
  49 #include "i386-gen.c"
  50 #endif
  51 #ifdef TCC_TARGET_ARM
  52 #include "arm-gen.c"
  53 #endif
  54 #ifdef TCC_TARGET_C67
  55 #include "c67-gen.c"
  56 #endif
  57 #ifdef TCC_TARGET_X86_64
  58 #include "x86_64-gen.c"
  59 #endif
  60 #ifdef CONFIG_TCC_ASM
  61 #include "tccasm.c"
  62 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
  63 #include "i386-asm.c"
  64 #endif
  65 #endif
  66 #ifdef TCC_TARGET_COFF
  67 #include "tcccoff.c"
  68 #endif
  69 #ifdef TCC_TARGET_PE
  70 #include "tccpe.c"
  71 #endif
  72 #endif /* ALL_IN_ONE */
  73
  74 /********************************************************/
  75 #ifndef CONFIG_TCC_ASM
  76 ST_FUNC void asm_instr(void)
  77 {
  78     error("inline asm() not supported");
  79 }
  80 ST_FUNC void asm_global_instr(void)
  81 {
  82     error("inline asm() not supported");
  83 }
  84 #endif
  85
  86 /********************************************************/
  87
  88 #ifdef _WIN32
  89 static char *normalize_slashes(char *path)
  90 {
  91     char *p;
  92     for (p = path; *p; ++p)
  93         if (*p == '\\')
  94             *p = '/';
  95     return path;
  96 }
  97
  98 static HMODULE tcc_module;
  99
 100 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
 101 static void tcc_set_lib_path_w32(TCCState *s)
 102 {
 103     char path[1024], *p;
 104     GetModuleFileNameA(tcc_module, path, sizeof path);
 105     p = tcc_basename(normalize_slashes(strlwr(path)));
 106     if (p - 5 > path && 0 == strncmp(p - 5, "/bin/", 5))
 107         p -= 5;
 108     else if (p > path)
 109         p--;
 110     *p = 0;
 111     tcc_set_lib_path(s, path);
 112 }
 113
 114 #ifndef CONFIG_TCC_STATIC
 115 void dlclose(void *p)
 116 {
 117     FreeLibrary((HMODULE)p);
 118 }
 119 #endif
 120
 121 #ifdef LIBTCC_AS_DLL
 122 BOOL WINAPI DllMain (HANDLE hDll, DWORD dwReason, LPVOID lpReserved)
 123 {
 124     if (DLL_PROCESS_ATTACH == dwReason)
 125         tcc_module = hDll;
 126     return TRUE;
 127 }
 128 #endif
 129 #endif
 130
 131 /********************************************************/
 132 /* copy a string and truncate it. */
 133 PUB_FUNC char *pstrcpy(char *buf, int buf_size, const char *s)
 134 {
 135     char *q, *q_end;
 136     int c;
 137
 138     if (buf_size > 0) {
 139         q = buf;
 140         q_end = buf + buf_size - 1;
 141         while (q < q_end) {
 142             c = *s++;
 143             if (c == '\0')
 144                 break;
 145             *q++ = c;
 146         }
 147         *q = '\0';
 148     }
 149     return buf;
 150 }
 151
 152 /* strcat and truncate. */
 153 PUB_FUNC char *pstrcat(char *buf, int buf_size, const char *s)
 154 {
 155     int len;
 156     len = strlen(buf);
 157     if (len < buf_size)
 158         pstrcpy(buf + len, buf_size - len, s);
 159     return buf;
 160 }
 161
 162 /* extract the basename of a file */
 163 PUB_FUNC char *tcc_basename(const char *name)
 164 {
 165     char *p = strchr(name, 0);
 166     while (p > name && !IS_PATHSEP(p[-1]))
 167         --p;
 168     return p;
 169 }
 170
 171 /* extract extension part of a file
 172  *
 173  * (if no extension, return pointer to end-of-string)
 174  */
 175 PUB_FUNC char *tcc_fileextension (const char *name)
 176 {
 177     char *b = tcc_basename(name);
 178     char *e = strrchr(b, '.');
 179     return e ? e : strchr(b, 0);
 180 }
 181
 182 /********************************************************/
 183 /* memory management */
 184
 185 #undef free
 186 #undef malloc
 187 #undef realloc
 188
 189 #ifdef MEM_DEBUG
 190 int mem_cur_size;
 191 int mem_max_size;
 192 unsigned malloc_usable_size(void*);
 193 #endif
 194
 195 PUB_FUNC void tcc_free(void *ptr)
 196 {
 197 #ifdef MEM_DEBUG
 198     mem_cur_size -= malloc_usable_size(ptr);
 199 #endif
 200     free(ptr);
 201 }
 202
 203 PUB_FUNC void *tcc_malloc(unsigned long size)
 204 {
 205     void *ptr;
 206     ptr = malloc(size);
 207     if (!ptr && size)
 208         error("memory full");
 209 #ifdef MEM_DEBUG
 210     mem_cur_size += malloc_usable_size(ptr);
 211     if (mem_cur_size > mem_max_size)
 212         mem_max_size = mem_cur_size;
 213 #endif
 214     return ptr;
 215 }
 216
 217 PUB_FUNC void *tcc_mallocz(unsigned long size)
 218 {
 219     void *ptr;
 220     ptr = tcc_malloc(size);
 221     memset(ptr, 0, size);
 222     return ptr;
 223 }
 224
 225 PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
 226 {
 227     void *ptr1;
 228 #ifdef MEM_DEBUG
 229     mem_cur_size -= malloc_usable_size(ptr);
 230 #endif
 231     ptr1 = realloc(ptr, size);
 232 #ifdef MEM_DEBUG
 233     /* NOTE: count not correct if alloc error, but not critical */
 234     mem_cur_size += malloc_usable_size(ptr1);
 235     if (mem_cur_size > mem_max_size)
 236         mem_max_size = mem_cur_size;
 237 #endif
 238     return ptr1;
 239 }
 240
 241 PUB_FUNC char *tcc_strdup(const char *str)
 242 {
 243     char *ptr;
 244     ptr = tcc_malloc(strlen(str) + 1);
 245     strcpy(ptr, str);
 246     return ptr;
 247 }
 248
 249 PUB_FUNC void tcc_memstats(void)
 250 {
 251 #ifdef MEM_DEBUG
 252     printf("memory in use: %d\n", mem_cur_size);
 253 #endif
 254 }
 255
 256 #define free(p) use_tcc_free(p)
 257 #define malloc(s) use_tcc_malloc(s)
 258 #define realloc(p, s) use_tcc_realloc(p, s)
 259
 260 /********************************************************/
 261 /* dynarrays */
 262
 263 PUB_FUNC void dynarray_add(void ***ptab, int *nb_ptr, void *data)
 264 {
 265     int nb, nb_alloc;
 266     void **pp;
 267
 268     nb = *nb_ptr;
 269     pp = *ptab;
 270     /* every power of two we double array size */
 271     if ((nb & (nb - 1)) == 0) {
 272         if (!nb)
 273             nb_alloc = 1;
 274         else
 275             nb_alloc = nb * 2;
 276         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 277         if (!pp)
 278             error("memory full");
 279         *ptab = pp;
 280     }
 281     pp[nb++] = data;
 282     *nb_ptr = nb;
 283 }
 284
 285 PUB_FUNC void dynarray_reset(void *pp, int *n)
 286 {
 287     void **p;
 288     for (p = *(void***)pp; *n; ++p, --*n)
 289         if (*p)
 290             tcc_free(*p);
 291     tcc_free(*(void**)pp);
 292     *(void**)pp = NULL;
 293 }
 294
 295 /* we use our own 'finite' function to avoid potential problems with
 296    non standard math libs */
 297 /* XXX: endianness dependent */
 298 ST_FUNC int ieee_finite(double d)
 299 {
 300     int *p = (int *)&d;
 301     return ((unsigned)((p[1] | 0x800fffff) + 1)) >> 31;
 302 }
 303
 304 /********************************************************/
 305
 306 ST_FUNC Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags)
 307 {
 308     Section *sec;
 309
 310     sec = tcc_mallocz(sizeof(Section) + strlen(name));
 311     strcpy(sec->name, name);
 312     sec->sh_type = sh_type;
 313     sec->sh_flags = sh_flags;
 314     switch(sh_type) {
 315     case SHT_HASH:
 316     case SHT_REL:
 317     case SHT_RELA:
 318     case SHT_DYNSYM:
 319     case SHT_SYMTAB:
 320     case SHT_DYNAMIC:
 321         sec->sh_addralign = 4;
 322         break;
 323     case SHT_STRTAB:
 324         sec->sh_addralign = 1;
 325         break;
 326     default:
 327         sec->sh_addralign = 32; /* default conservative alignment */
 328         break;
 329     }
 330
 331     if (sh_flags & SHF_PRIVATE) {
 332         dynarray_add((void ***)&s1->priv_sections, &s1->nb_priv_sections, sec);
 333     } else {
 334         sec->sh_num = s1->nb_sections;
 335         dynarray_add((void ***)&s1->sections, &s1->nb_sections, sec);
 336     }
 337
 338     return sec;
 339 }
 340
 341 static void free_section(Section *s)
 342 {
 343     tcc_free(s->data);
 344 }
 345
 346 /* realloc section and set its content to zero */
 347 ST_FUNC void section_realloc(Section *sec, unsigned long new_size)
 348 {
 349     unsigned long size;
 350     unsigned char *data;
 351
 352     size = sec->data_allocated;
 353     if (size == 0)
 354         size = 1;
 355     while (size < new_size)
 356         size = size * 2;
 357     data = tcc_realloc(sec->data, size);
 358     if (!data)
 359         error("memory full");
 360     memset(data + sec->data_allocated, 0, size - sec->data_allocated);
 361     sec->data = data;
 362     sec->data_allocated = size;
 363 }
 364
 365 /* reserve at least 'size' bytes in section 'sec' from
 366    sec->data_offset. */
 367 ST_FUNC void *section_ptr_add(Section *sec, unsigned long size)
 368 {
 369     unsigned long offset, offset1;
 370
 371     offset = sec->data_offset;
 372     offset1 = offset + size;
 373     if (offset1 > sec->data_allocated)
 374         section_realloc(sec, offset1);
 375     sec->data_offset = offset1;
 376     return sec->data + offset;
 377 }
 378
 379 /* reserve at least 'size' bytes from section start */
 380 ST_FUNC void section_reserve(Section *sec, unsigned long size)
 381 {
 382     if (size > sec->data_allocated)
 383         section_realloc(sec, size);
 384     if (size > sec->data_offset)
 385         sec->data_offset = size;
 386 }
 387
 388 /* return a reference to a section, and create it if it does not
 389    exists */
 390 ST_FUNC Section *find_section(TCCState *s1, const char *name)
 391 {
 392     Section *sec;
 393     int i;
 394     for(i = 1; i < s1->nb_sections; i++) {
 395         sec = s1->sections[i];
 396         if (!strcmp(name, sec->name))
 397             return sec;
 398     }
 399     /* sections are created as PROGBITS */
 400     return new_section(s1, name, SHT_PROGBITS, SHF_ALLOC);
 401 }
 402
 403 /* update sym->c so that it points to an external symbol in section
 404    'section' with value 'value' */
 405 ST_FUNC void put_extern_sym2(Sym *sym, Section *section,
 406                             unsigned long value, unsigned long size,
 407                             int can_add_underscore)
 408 {
 409     int sym_type, sym_bind, sh_num, info, other;
 410     ElfW(Sym) *esym;
 411     const char *name;
 412     char buf1[256];
 413
 414     if (section == NULL)
 415         sh_num = SHN_UNDEF;
 416     else if (section == SECTION_ABS)
 417         sh_num = SHN_ABS;
 418     else
 419         sh_num = section->sh_num;
 420
 421     if ((sym->type.t & VT_BTYPE) == VT_FUNC) {
 422         sym_type = STT_FUNC;
 423     } else if ((sym->type.t & VT_BTYPE) == VT_VOID) {
 424         sym_type = STT_NOTYPE;
 425     } else {
 426         sym_type = STT_OBJECT;
 427     }
 428
 429     if (sym->type.t & VT_STATIC)
 430         sym_bind = STB_LOCAL;
 431     else {
 432         if (sym_type == STT_FUNC && sym->type.ref && FUNC_WEAK(sym->type.ref->r))
 433             sym_bind = STB_WEAK;
 434         else
 435             sym_bind = STB_GLOBAL;
 436     }
 437
 438     if (!sym->c) {
 439         if (sym->a)
 440           name = get_tok_str(sym->a, NULL);
 441         else
 442           name = get_tok_str(sym->v, NULL);
 443 #ifdef CONFIG_TCC_BCHECK
 444         if (tcc_state->do_bounds_check) {
 445             char buf[32];
 446
 447             /* XXX: avoid doing that for statics ? */
 448             /* if bound checking is activated, we change some function
 449                names by adding the "__bound" prefix */
 450             switch(sym->v) {
 451 #ifdef TCC_TARGET_PE
 452             /* XXX: we rely only on malloc hooks */
 453             case TOK_malloc:
 454             case TOK_free:
 455             case TOK_realloc:
 456             case TOK_memalign:
 457             case TOK_calloc:
 458 #endif
 459             case TOK_memcpy:
 460             case TOK_memmove:
 461             case TOK_memset:
 462             case TOK_strlen:
 463             case TOK_strcpy:
 464             case TOK_alloca:
 465                 strcpy(buf, "__bound_");
 466                 strcat(buf, name);
 467                 name = buf;
 468                 break;
 469             }
 470         }
 471 #endif
 472         other = 0;
 473
 474 #ifdef TCC_TARGET_PE
 475         if (sym->type.t & VT_EXPORT)
 476             other |= 1;
 477         if (sym_type == STT_FUNC && sym->type.ref) {
 478             int attr = sym->type.ref->r;
 479             if (FUNC_EXPORT(attr))
 480                 other |= 1;
 481             if (FUNC_CALL(attr) == FUNC_STDCALL && can_add_underscore) {
 482                 sprintf(buf1, "_%s@%d", name, FUNC_ARGS(attr) * PTR_SIZE);
 483                 name = buf1;
 484                 other |= 2;
 485                 can_add_underscore = 0;
 486             }
 487         } else {
 488             if (find_elf_sym(tcc_state->dynsymtab_section, name))
 489                 other |= 4;
 490             if (sym->type.t & VT_IMPORT)
 491                 other |= 4;
 492         }
 493 #endif
 494         if (tcc_state->leading_underscore && can_add_underscore) {
 495             buf1[0] = '_';
 496             pstrcpy(buf1 + 1, sizeof(buf1) - 1, name);
 497             name = buf1;
 498         }
 499         info = ELFW(ST_INFO)(sym_bind, sym_type);
 500         sym->c = add_elf_sym(symtab_section, value, size, info, other, sh_num, name);
 501     } else {
 502         esym = &((ElfW(Sym) *)symtab_section->data)[sym->c];
 503         esym->st_value = value;
 504         esym->st_size = size;
 505         esym->st_shndx = sh_num;
 506     }
 507 }
 508
 509 ST_FUNC void put_extern_sym(Sym *sym, Section *section,
 510                            unsigned long value, unsigned long size)
 511 {
 512     put_extern_sym2(sym, section, value, size, 1);
 513 }
 514
 515 /* add a new relocation entry to symbol 'sym' in section 's' */
 516 ST_FUNC void greloc(Section *s, Sym *sym, unsigned long offset, int type)
 517 {
 518     int c = 0;
 519     if (sym) {
 520         if (0 == sym->c)
 521             put_extern_sym(sym, NULL, 0, 0);
 522         c = sym->c;
 523     }
 524     /* now we can add ELF relocation info */
 525     put_elf_reloc(symtab_section, s, offset, type, c);
 526 }
 527
 528 /********************************************************/
 529
 530 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 531 {
 532     int len;
 533     len = strlen(buf);
 534     vsnprintf(buf + len, buf_size - len, fmt, ap);
 535 }
 536
 537 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 538 {
 539     va_list ap;
 540     va_start(ap, fmt);
 541     strcat_vprintf(buf, buf_size, fmt, ap);
 542     va_end(ap);
 543 }
 544
 545 static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 546 {
 547     char buf[2048];
 548     BufferedFile **f;
 549
 550     buf[0] = '\0';
 551     if (file) {
 552         for(f = s1->include_stack; f < s1->include_stack_ptr; f++)
 553             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 554                           (*f)->filename, (*f)->line_num);
 555         if (file->line_num > 0) {
 556             strcat_printf(buf, sizeof(buf),
 557                           "%s:%d: ", file->filename, file->line_num);
 558         } else {
 559             strcat_printf(buf, sizeof(buf),
 560                           "%s: ", file->filename);
 561         }
 562     } else {
 563         strcat_printf(buf, sizeof(buf),
 564                       "tcc: ");
 565     }
 566     if (is_warning)
 567         strcat_printf(buf, sizeof(buf), "warning: ");
 568     else
 569         strcat_printf(buf, sizeof(buf), "error: ");
 570     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 571
 572     if (!s1->error_func) {
 573         /* default case: stderr */
 574         fprintf(stderr, "%s\n", buf);
 575     } else {
 576         s1->error_func(s1->error_opaque, buf);
 577     }
 578     if (!is_warning || s1->warn_error)
 579         s1->nb_errors++;
 580 }
 581
 582 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque,
 583                         void (*error_func)(void *opaque, const char *msg))
 584 {
 585     s->error_opaque = error_opaque;
 586     s->error_func = error_func;
 587 }
 588
 589 /* error without aborting current compilation */
 590 PUB_FUNC void error_noabort(const char *fmt, ...)
 591 {
 592     TCCState *s1 = tcc_state;
 593     va_list ap;
 594
 595     va_start(ap, fmt);
 596     error1(s1, 0, fmt, ap);
 597     va_end(ap);
 598 }
 599
 600 PUB_FUNC void error(const char *fmt, ...)
 601 {
 602     TCCState *s1 = tcc_state;
 603     va_list ap;
 604
 605     va_start(ap, fmt);
 606     error1(s1, 0, fmt, ap);
 607     va_end(ap);
 608     /* better than nothing: in some cases, we accept to handle errors */
 609     if (s1->error_set_jmp_enabled) {
 610         longjmp(s1->error_jmp_buf, 1);
 611     } else {
 612         /* XXX: eliminate this someday */
 613         exit(1);
 614     }
 615 }
 616
 617 PUB_FUNC void expect(const char *msg)
 618 {
 619     error("%s expected", msg);
 620 }
 621
 622 PUB_FUNC void warning(const char *fmt, ...)
 623 {
 624     TCCState *s1 = tcc_state;
 625     va_list ap;
 626
 627     if (s1->warn_none)
 628         return;
 629
 630     va_start(ap, fmt);
 631     error1(s1, 1, fmt, ap);
 632     va_end(ap);
 633 }
 634
 635 /********************************************************/
 636 /* I/O layer */
 637
 638 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
 639 {
 640     BufferedFile *bf;
 641     int buflen = initlen ? initlen : IO_BUF_SIZE;
 642
 643     bf = tcc_malloc(sizeof(BufferedFile) + buflen);
 644     bf->buf_ptr = bf->buffer;
 645     bf->buf_end = bf->buffer + initlen;
 646     bf->buf_end[0] = CH_EOB; /* put eob symbol */
 647     pstrcpy(bf->filename, sizeof(bf->filename), filename);
 648 #ifdef _WIN32
 649     normalize_slashes(bf->filename);
 650 #endif
 651     bf->line_num = 1;
 652     bf->ifndef_macro = 0;
 653     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
 654     bf->fd = -1;
 655     bf->prev = file;
 656     file = bf;
 657 }
 658
 659 ST_FUNC void tcc_close(void)
 660 {
 661     BufferedFile *bf = file;
 662     if (bf->fd > 0) {
 663         close(bf->fd);
 664         total_lines += bf->line_num;
 665     }
 666     file = bf->prev;
 667     tcc_free(bf);
 668 }
 669
 670 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
 671 {
 672     int fd;
 673     if (strcmp(filename, "-") == 0)
 674         fd = 0, filename = "stdin";
 675     else
 676         fd = open(filename, O_RDONLY | O_BINARY);
 677     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
 678         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
 679                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
 680     if (fd < 0)
 681         return -1;
 682
 683     tcc_open_bf(s1, filename, 0);
 684     file->fd = fd;
 685     return fd;
 686 }
 687
 688 /* compile the C file opened in 'file'. Return non zero if errors. */
 689 static int tcc_compile(TCCState *s1)
 690 {
 691     Sym *define_start;
 692     char buf[512];
 693     volatile int section_sym;
 694
 695 #ifdef INC_DEBUG
 696     printf("%s: **** new file\n", file->filename);
 697 #endif
 698     preprocess_init(s1);
 699
 700     cur_text_section = NULL;
 701     funcname = "";
 702     anon_sym = SYM_FIRST_ANOM;
 703
 704     /* file info: full path + filename */
 705     section_sym = 0; /* avoid warning */
 706     if (s1->do_debug) {
 707         section_sym = put_elf_sym(symtab_section, 0, 0,
 708                                   ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
 709                                   text_section->sh_num, NULL);
 710         getcwd(buf, sizeof(buf));
 711 #ifdef _WIN32
 712         normalize_slashes(buf);
 713 #endif
 714         pstrcat(buf, sizeof(buf), "/");
 715         put_stabs_r(buf, N_SO, 0, 0,
 716                     text_section->data_offset, text_section, section_sym);
 717         put_stabs_r(file->filename, N_SO, 0, 0,
 718                     text_section->data_offset, text_section, section_sym);
 719     }
 720     /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
 721        symbols can be safely used */
 722     put_elf_sym(symtab_section, 0, 0,
 723                 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
 724                 SHN_ABS, file->filename);
 725
 726     /* define some often used types */
 727     int_type.t = VT_INT;
 728
 729     char_pointer_type.t = VT_BYTE;
 730     mk_pointer(&char_pointer_type);
 731
 732     func_old_type.t = VT_FUNC;
 733     func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
 734
 735 #if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP)
 736     float_type.t = VT_FLOAT;
 737     double_type.t = VT_DOUBLE;
 738
 739     func_float_type.t = VT_FUNC;
 740     func_float_type.ref = sym_push(SYM_FIELD, &float_type, FUNC_CDECL, FUNC_OLD);
 741     func_double_type.t = VT_FUNC;
 742     func_double_type.ref = sym_push(SYM_FIELD, &double_type, FUNC_CDECL, FUNC_OLD);
 743 #endif
 744
 745 #if 0
 746     /* define 'void *alloca(unsigned int)' builtin function */
 747     {
 748         Sym *s1;
 749
 750         p = anon_sym++;
 751         sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
 752         s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
 753         s1->next = NULL;
 754         sym->next = s1;
 755         sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
 756     }
 757 #endif
 758
 759     define_start = define_stack;
 760     nocode_wanted = 1;
 761
 762     if (setjmp(s1->error_jmp_buf) == 0) {
 763         s1->nb_errors = 0;
 764         s1->error_set_jmp_enabled = 1;
 765
 766         ch = file->buf_ptr[0];
 767         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 768         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
 769         next();
 770         decl(VT_CONST);
 771         if (tok != TOK_EOF)
 772             expect("declaration");
 773
 774         /* end of translation unit info */
 775         if (s1->do_debug) {
 776             put_stabs_r(NULL, N_SO, 0, 0,
 777                         text_section->data_offset, text_section, section_sym);
 778         }
 779     }
 780     s1->error_set_jmp_enabled = 0;
 781
 782     /* reset define stack, but leave -Dsymbols (may be incorrect if
 783        they are undefined) */
 784     free_defines(define_start);
 785
 786     gen_inline_functions();
 787
 788     sym_pop(&global_stack, NULL);
 789     sym_pop(&local_stack, NULL);
 790
 791     return s1->nb_errors != 0 ? -1 : 0;
 792 }
 793
 794 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 795 {
 796     int len, ret;
 797     len = strlen(str);
 798
 799     tcc_open_bf(s, "<string>", len);
 800     memcpy(file->buffer, str, len);
 801     ret = tcc_compile(s);
 802     tcc_close();
 803     return ret;
 804 }
 805
 806 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
 807 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 808 {
 809     int len1, len2;
 810     /* default value */
 811     if (!value)
 812         value = "1";
 813     len1 = strlen(sym);
 814     len2 = strlen(value);
 815
 816     /* init file structure */
 817     tcc_open_bf(s1, "<define>", len1 + len2 + 1);
 818     memcpy(file->buffer, sym, len1);
 819     file->buffer[len1] = ' ';
 820     memcpy(file->buffer + len1 + 1, value, len2);
 821
 822     /* parse with define parser */
 823     ch = file->buf_ptr[0];
 824     next_nomacro();
 825     parse_define();
 826
 827     tcc_close();
 828 }
 829
 830 /* undefine a preprocessor symbol */
 831 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 832 {
 833     TokenSym *ts;
 834     Sym *s;
 835     ts = tok_alloc(sym, strlen(sym));
 836     s = define_find(ts->tok);
 837     /* undefine symbol by putting an invalid name */
 838     if (s)
 839         define_undef(s);
 840 }
 841
 842 static void tcc_cleanup(void)
 843 {
 844     int i, n;
 845
 846     if (NULL == tcc_state)
 847         return;
 848     tcc_state = NULL;
 849
 850     /* free -D defines */
 851     free_defines(NULL);
 852
 853     /* free tokens */
 854     n = tok_ident - TOK_IDENT;
 855     for(i = 0; i < n; i++)
 856         tcc_free(table_ident[i]);
 857     tcc_free(table_ident);
 858
 859     /* free sym_pools */
 860     dynarray_reset(&sym_pools, &nb_sym_pools);
 861     /* string buffer */
 862     cstr_free(&tokcstr);
 863     /* reset symbol stack */
 864     sym_free_first = NULL;
 865     /* cleanup from error/setjmp */
 866     macro_ptr = NULL;
 867 }
 868
 869 LIBTCCAPI TCCState *tcc_new(void)
 870 {
 871     TCCState *s;
 872     char buffer[100];
 873     int a,b,c;
 874
 875     tcc_cleanup();
 876
 877     s = tcc_mallocz(sizeof(TCCState));
 878     if (!s)
 879         return NULL;
 880     tcc_state = s;
 881 #ifdef _WIN32
 882     tcc_set_lib_path_w32(s);
 883 #else
 884     tcc_set_lib_path(s, CONFIG_TCCDIR);
 885 #endif
 886     s->output_type = TCC_OUTPUT_MEMORY;
 887     preprocess_new();
 888     s->include_stack_ptr = s->include_stack;
 889
 890     /* we add dummy defines for some special macros to speed up tests
 891        and to have working defined() */
 892     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
 893     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
 894     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
 895     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
 896
 897     /* standard defines */
 898     tcc_define_symbol(s, "__STDC__", NULL);
 899     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 900 #if defined(TCC_TARGET_I386)
 901     tcc_define_symbol(s, "__i386__", NULL);
 902     tcc_define_symbol(s, "__i386", NULL);
 903     tcc_define_symbol(s, "i386", NULL);
 904 #endif
 905 #if defined(TCC_TARGET_X86_64)
 906     tcc_define_symbol(s, "__x86_64__", NULL);
 907 #endif
 908 #if defined(TCC_TARGET_ARM)
 909     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 910     tcc_define_symbol(s, "__arm_elf__", NULL);
 911     tcc_define_symbol(s, "__arm_elf", NULL);
 912     tcc_define_symbol(s, "arm_elf", NULL);
 913     tcc_define_symbol(s, "__arm__", NULL);
 914     tcc_define_symbol(s, "__arm", NULL);
 915     tcc_define_symbol(s, "arm", NULL);
 916     tcc_define_symbol(s, "__APCS_32__", NULL);
 917 #endif
 918 #ifdef TCC_TARGET_PE
 919     tcc_define_symbol(s, "_WIN32", NULL);
 920 #ifdef TCC_TARGET_X86_64
 921     tcc_define_symbol(s, "_WIN64", NULL);
 922 #endif
 923 #else
 924     tcc_define_symbol(s, "__unix__", NULL);
 925     tcc_define_symbol(s, "__unix", NULL);
 926     tcc_define_symbol(s, "unix", NULL);
 927 #if defined(__FreeBSD__)
 928 #define str(s) #s
 929     tcc_define_symbol(s, "__FreeBSD__", str( __FreeBSD__));
 930 #undef str
 931 #endif
 932 #if defined(__FreeBSD_kernel__)
 933     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
 934 #endif
 935 #if defined(__linux)
 936     tcc_define_symbol(s, "__linux__", NULL);
 937     tcc_define_symbol(s, "__linux", NULL);
 938 #endif
 939 #endif
 940     /* tiny C specific defines */
 941     sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
 942     sprintf(buffer, "%d", a*10000 + b*100 + c);
 943     tcc_define_symbol(s, "__TINYC__", buffer);
 944
 945     /* tiny C & gcc defines */
 946 #if defined TCC_TARGET_PE && defined TCC_TARGET_X86_64
 947     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
 948     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
 949 #else
 950     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 951     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 952 #endif
 953
 954 #ifdef TCC_TARGET_PE
 955     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
 956 #else
 957     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
 958 #endif
 959
 960     /* glibc defines */
 961     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)", "name proto __asm__ (#alias) __THROW");
 962
 963 #ifndef TCC_TARGET_PE
 964     /* default library paths */
 965     tcc_add_library_path(s, CONFIG_TCC_CRT_PREFIX);
 966     tcc_add_library_path(s, CONFIG_SYSROOT CONFIG_TCC_LDDIR);
 967     tcc_add_library_path(s, CONFIG_SYSROOT "/usr/local"CONFIG_TCC_LDDIR);
 968 #endif
 969
 970     /* no section zero */
 971     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
 972
 973     /* create standard sections */
 974     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
 975     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
 976     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
 977
 978     /* symbols are always generated for linking stage */
 979     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
 980                                 ".strtab",
 981                                 ".hashtab", SHF_PRIVATE);
 982     strtab_section = symtab_section->link;
 983
 984     /* private symbol table for dynamic symbols */
 985     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
 986                                       ".dynstrtab",
 987                                       ".dynhashtab", SHF_PRIVATE);
 988     s->alacarte_link = 1;
 989     s->nocommon = 1;
 990
 991 #ifdef CHAR_IS_UNSIGNED
 992     s->char_is_unsigned = 1;
 993 #endif
 994 #if defined(TCC_TARGET_PE) && 0
 995     /* XXX: currently the PE linker is not ready to support that */
 996     s->leading_underscore = 1;
 997 #endif
 998     if (s->section_align == 0)
 999         s->section_align = ELF_PAGE_SIZE;
1000 #ifdef TCC_TARGET_I386
1001     s->seg_size = 32;
1002 #endif
1003     return s;
1004 }
1005
1006 LIBTCCAPI void tcc_delete(TCCState *s1)
1007 {
1008     int i;
1009
1010     tcc_cleanup();
1011
1012     /* free all sections */
1013     for(i = 1; i < s1->nb_sections; i++)
1014         free_section(s1->sections[i]);
1015     dynarray_reset(&s1->sections, &s1->nb_sections);
1016
1017     for(i = 0; i < s1->nb_priv_sections; i++)
1018         free_section(s1->priv_sections[i]);
1019     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1020
1021     /* free any loaded DLLs */
1022     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1023         DLLReference *ref = s1->loaded_dlls[i];
1024         if ( ref->handle )
1025             dlclose(ref->handle);
1026     }
1027
1028     /* free loaded dlls array */
1029     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1030
1031     /* free library paths */
1032     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1033
1034     /* free include paths */
1035     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1036     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1037     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1038
1039     tcc_free(s1->tcc_lib_path);
1040
1041     dynarray_reset(&s1->input_files, &s1->nb_input_files);
1042     dynarray_reset(&s1->input_libs, &s1->nb_input_libs);
1043     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
1044
1045 #ifdef HAVE_SELINUX
1046     munmap (s1->write_mem, s1->mem_size);
1047     munmap (s1->runtime_mem, s1->mem_size);
1048 #else
1049     tcc_free(s1->runtime_mem);
1050 #endif
1051     tcc_free(s1);
1052 }
1053
1054 LIBTCCAPI int tcc_add_include_path(TCCState *s1, const char *pathname)
1055 {
1056     char *pathname1;
1057
1058     pathname1 = tcc_strdup(pathname);
1059     dynarray_add((void ***)&s1->include_paths, &s1->nb_include_paths, pathname1);
1060     return 0;
1061 }
1062
1063 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s1, const char *pathname)
1064 {
1065     char *pathname1;
1066
1067     pathname1 = tcc_strdup(pathname);
1068     dynarray_add((void ***)&s1->sysinclude_paths, &s1->nb_sysinclude_paths, pathname1);
1069     return 0;
1070 }
1071
1072 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1073 {
1074     const char *ext;
1075     ElfW(Ehdr) ehdr;
1076     int fd, ret, size;
1077
1078     /* find source file type with extension */
1079     ext = tcc_fileextension(filename);
1080     if (ext[0])
1081         ext++;
1082
1083     /* open the file */
1084     ret = tcc_open(s1, filename);
1085     if (ret < 0) {
1086         if (flags & AFF_PRINT_ERROR)
1087             error_noabort("file '%s' not found", filename);
1088         return ret;
1089     }
1090
1091     /* update target deps */
1092     dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1093             tcc_strdup(filename));
1094
1095     if (flags & AFF_PREPROCESS) {
1096         ret = tcc_preprocess(s1);
1097         goto the_end;
1098     }
1099
1100     if (!ext[0] || !PATHCMP(ext, "c")) {
1101         /* C file assumed */
1102         ret = tcc_compile(s1);
1103         goto the_end;
1104     }
1105
1106 #ifdef CONFIG_TCC_ASM
1107     if (!strcmp(ext, "S")) {
1108         /* preprocessed assembler */
1109         ret = tcc_assemble(s1, 1);
1110         goto the_end;
1111     }
1112
1113     if (!strcmp(ext, "s")) {
1114         /* non preprocessed assembler */
1115         ret = tcc_assemble(s1, 0);
1116         goto the_end;
1117     }
1118 #endif
1119
1120     fd = file->fd;
1121     /* assume executable format: auto guess file type */
1122     size = read(fd, &ehdr, sizeof(ehdr));
1123     lseek(fd, 0, SEEK_SET);
1124     if (size <= 0) {
1125         error_noabort("could not read header");
1126         goto the_end;
1127     }
1128
1129     if (size == sizeof(ehdr) &&
1130         ehdr.e_ident[0] == ELFMAG0 &&
1131         ehdr.e_ident[1] == ELFMAG1 &&
1132         ehdr.e_ident[2] == ELFMAG2 &&
1133         ehdr.e_ident[3] == ELFMAG3) {
1134
1135         /* do not display line number if error */
1136         file->line_num = 0;
1137         if (ehdr.e_type == ET_REL) {
1138             ret = tcc_load_object_file(s1, fd, 0);
1139             goto the_end;
1140
1141         }
1142 #ifndef TCC_TARGET_PE
1143         if (ehdr.e_type == ET_DYN) {
1144             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1145                 void *h;
1146                 h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1147                 if (h)
1148                     ret = 0;
1149             } else {
1150                 ret = tcc_load_dll(s1, fd, filename,
1151                                    (flags & AFF_REFERENCED_DLL) != 0);
1152             }
1153             goto the_end;
1154         }
1155 #endif
1156         error_noabort("unrecognized ELF file");
1157         goto the_end;
1158     }
1159
1160     if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
1161         file->line_num = 0; /* do not display line number if error */
1162         ret = tcc_load_archive(s1, fd);
1163         goto the_end;
1164     }
1165
1166 #ifdef TCC_TARGET_COFF
1167     if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
1168         ret = tcc_load_coff(s1, fd);
1169         goto the_end;
1170     }
1171 #endif
1172
1173 #ifdef TCC_TARGET_PE
1174     ret = pe_load_file(s1, filename, fd);
1175 #else
1176     /* as GNU ld, consider it is an ld script if not recognized */
1177     ret = tcc_load_ldscript(s1);
1178 #endif
1179     if (ret < 0)
1180         error_noabort("unrecognized file type");
1181
1182 the_end:
1183     tcc_close();
1184     return ret;
1185 }
1186
1187 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1188 {
1189     dynarray_add((void ***)&s->input_files, &s->nb_input_files, tcc_strdup(filename));
1190
1191     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1192         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS);
1193     else
1194         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR);
1195 }
1196
1197 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1198 {
1199     char *pathname1;
1200
1201     pathname1 = tcc_strdup(pathname);
1202     dynarray_add((void ***)&s->library_paths, &s->nb_library_paths, pathname1);
1203     return 0;
1204 }
1205
1206 /* find and load a dll. Return non zero if not found */
1207 /* XXX: add '-rpath' option support ? */
1208 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1209 {
1210     char buf[1024];
1211     int i;
1212
1213     for(i = 0; i < s->nb_library_paths; i++) {
1214         snprintf(buf, sizeof(buf), "%s/%s",
1215                  s->library_paths[i], filename);
1216         if (tcc_add_file_internal(s, buf, flags) == 0)
1217             return 0;
1218     }
1219     return -1;
1220 }
1221
1222 /* the library name is the same as the argument of the '-l' option */
1223 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1224 {
1225     char buf[1024];
1226     int i;
1227
1228     dynarray_add((void ***)&s->input_libs, &s->nb_input_libs, tcc_strdup(libraryname));
1229
1230     /* first we look for the dynamic library if not static linking */
1231     if (!s->static_link) {
1232 #ifdef TCC_TARGET_PE
1233         if (pe_add_dll(s, libraryname) == 0)
1234             return 0;
1235 #else
1236         snprintf(buf, sizeof(buf), "lib%s.so", libraryname);
1237         if (tcc_add_dll(s, buf, 0) == 0)
1238             return 0;
1239 #endif
1240     }
1241     /* then we look for the static library */
1242     for(i = 0; i < s->nb_library_paths; i++) {
1243         snprintf(buf, sizeof(buf), "%s/lib%s.a",
1244                  s->library_paths[i], libraryname);
1245         if (tcc_add_file_internal(s, buf, 0) == 0)
1246             return 0;
1247     }
1248     return -1;
1249 }
1250
1251 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1252 {
1253 #ifdef TCC_TARGET_PE
1254     pe_putimport(s, 0, name, val);
1255 #else
1256     add_elf_sym(symtab_section, (uplong)val, 0,
1257                 ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1258                 SHN_ABS, name);
1259 #endif
1260     return 0;
1261 }
1262
1263 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
1264 {
1265     char buf[1024];
1266
1267     s->output_type = output_type;
1268
1269     if (!s->nostdinc) {
1270         /* default include paths */
1271         /* XXX: reverse order needed if -isystem support */
1272 #ifndef TCC_TARGET_PE
1273         tcc_add_sysinclude_path(s, CONFIG_SYSROOT "/usr/local/include");
1274         tcc_add_sysinclude_path(s, CONFIG_SYSROOT "/usr/include");
1275 #endif
1276         snprintf(buf, sizeof(buf), "%s/include", s->tcc_lib_path);
1277         tcc_add_sysinclude_path(s, buf);
1278 #ifdef TCC_TARGET_PE
1279         snprintf(buf, sizeof(buf), "%s/include/winapi", s->tcc_lib_path);
1280         tcc_add_sysinclude_path(s, buf);
1281 #endif
1282     }
1283
1284     /* if bound checking, then add corresponding sections */
1285 #ifdef CONFIG_TCC_BCHECK
1286     if (s->do_bounds_check) {
1287         /* define symbol */
1288         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1289         /* create bounds sections */
1290         bounds_section = new_section(s, ".bounds",
1291                                      SHT_PROGBITS, SHF_ALLOC);
1292         lbounds_section = new_section(s, ".lbounds",
1293                                       SHT_PROGBITS, SHF_ALLOC);
1294     }
1295 #endif
1296
1297     if (s->char_is_unsigned) {
1298         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
1299     }
1300
1301     /* add debug sections */
1302     if (s->do_debug) {
1303         /* stab symbols */
1304         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
1305         stab_section->sh_entsize = sizeof(Stab_Sym);
1306         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
1307         put_elf_str(stabstr_section, "");
1308         stab_section->link = stabstr_section;
1309         /* put first entry */
1310         put_stabs("", 0, 0, 0, 0);
1311     }
1312
1313     /* add libc crt1/crti objects */
1314 #ifndef TCC_TARGET_PE
1315     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1316         !s->nostdlib) {
1317         if (output_type != TCC_OUTPUT_DLL)
1318             tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crt1.o");
1319         tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crti.o");
1320     }
1321 #endif
1322
1323 #ifdef TCC_TARGET_PE
1324     snprintf(buf, sizeof(buf), "%s/lib", s->tcc_lib_path);
1325     tcc_add_library_path(s, buf);
1326 #ifdef _WIN32
1327     if (GetSystemDirectory(buf, sizeof buf))
1328         tcc_add_library_path(s, buf);
1329 #endif
1330 #endif
1331
1332     return 0;
1333 }
1334
1335 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1336 #define FD_INVERT 0x0002 /* invert value before storing */
1337
1338 typedef struct FlagDef {
1339     uint16_t offset;
1340     uint16_t flags;
1341     const char *name;
1342 } FlagDef;
1343
1344 static const FlagDef warning_defs[] = {
1345     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1346     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1347     { offsetof(TCCState, warn_error), 0, "error" },
1348     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1349       "implicit-function-declaration" },
1350 };
1351
1352 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1353                     const char *name, int value)
1354 {
1355     int i;
1356     const FlagDef *p;
1357     const char *r;
1358
1359     r = name;
1360     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
1361         r += 3;
1362         value = !value;
1363     }
1364     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1365         if (!strcmp(r, p->name))
1366             goto found;
1367     }
1368     return -1;
1369  found:
1370     if (p->flags & FD_INVERT)
1371         value = !value;
1372     *(int *)((uint8_t *)s + p->offset) = value;
1373     return 0;
1374 }
1375
1376 /* set/reset a warning */
1377 LIBTCCAPI int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1378 {
1379     int i;
1380     const FlagDef *p;
1381
1382     if (!strcmp(warning_name, "all")) {
1383         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1384             if (p->flags & WD_ALL)
1385                 *(int *)((uint8_t *)s + p->offset) = 1;
1386         }
1387         return 0;
1388     } else {
1389         return set_flag(s, warning_defs, countof(warning_defs),
1390                         warning_name, value);
1391     }
1392 }
1393
1394 static const FlagDef flag_defs[] = {
1395     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1396     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1397     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1398     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1399 };
1400
1401 /* set/reset a flag */
1402 PUB_FUNC int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1403 {
1404     return set_flag(s, flag_defs, countof(flag_defs),
1405                     flag_name, value);
1406 }
1407
1408
1409 static int strstart(const char *str, const char *val, char **ptr)
1410 {
1411     const char *p, *q;
1412     p = str;
1413     q = val;
1414     while (*q != '\0') {
1415         if (*p != *q)
1416             return 0;
1417         p++;
1418         q++;
1419     }
1420     if (ptr)
1421         *ptr = (char *) p;
1422     return 1;
1423 }
1424
1425
1426 /* Like strstart, but automatically takes into account that ld options can
1427  *
1428  * - start with double or single dash (e.g. '--soname' or '-soname')
1429  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1430  *   or '-Wl,-soname=x.so')
1431  *
1432  * you provide `val` always in 'option[=]' form (no leading -)
1433  */
1434 static int link_option(const char *str, const char *val, char **ptr)
1435 {
1436     const char *p, *q;
1437
1438     /* there should be 1 or 2 dashes */
1439     if (*str++ != '-')
1440         return 0;
1441     if (*str == '-')
1442         str++;
1443
1444     /* then str & val should match (potentialy up to '=') */
1445     p = str;
1446     q = val;
1447
1448     while (*q != '\0' && *q != '=') {
1449         if (*p != *q)
1450             return 0;
1451         p++;
1452         q++;
1453     }
1454
1455     /* '=' near eos means ',' or '=' is ok */
1456     if (*q == '=') {
1457         if (*p != ',' && *p != '=')
1458             return 0;
1459         p++;
1460         q++;
1461     }
1462
1463     if (ptr)
1464         *ptr = (char *) p;
1465     return 1;
1466 }
1467
1468
1469 /* set linker options */
1470 PUB_FUNC const char * tcc_set_linker(TCCState *s, char *option, int multi)
1471 {
1472     char *p = option;
1473     char *end;
1474
1475     while (option && *option) {
1476         end = NULL;
1477         if (link_option(option, "Bsymbolic", &p)) {
1478             s->symbolic = TRUE;
1479 #ifdef TCC_TARGET_PE
1480         } else if (link_option(option, "file-alignment=", &p)) {
1481             s->pe_file_align = strtoul(p, &end, 16);
1482 #endif
1483         } else if (link_option(option, "fini=", &p)) {
1484             s->fini_symbol = p;
1485             if (s->warn_unsupported)
1486                 warning("ignoring -fini %s", p);
1487
1488         } else if (link_option(option, "image-base=", &p)) {
1489             s->text_addr = strtoul(p, &end, 16);
1490             s->has_text_addr = 1;
1491         } else if (link_option(option, "init=", &p)) {
1492             s->init_symbol = p;
1493             if (s->warn_unsupported)
1494                 warning("ignoring -init %s", p);
1495
1496         } else if (link_option(option, "oformat=", &p)) {
1497 #if defined(TCC_TARGET_PE)
1498             if (strstart(p, "pe-", NULL)) {
1499 #else
1500 #if defined(TCC_TARGET_X86_64)
1501             if (strstart(p, "elf64-", NULL)) {
1502 #else
1503             if (strstart(p, "elf32-", NULL)) {
1504 #endif
1505 #endif
1506                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1507             } else if (!strcmp(p, "binary")) {
1508                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1509             } else
1510 #ifdef TCC_TARGET_COFF
1511             if (!strcmp(p, "coff")) {
1512                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1513             } else
1514 #endif
1515             {
1516                 return p;
1517             }
1518
1519         } else if (link_option(option, "rpath=", &p)) {
1520             s->rpath = p;
1521         } else if (link_option(option, "section-alignment=", &p)) {
1522             s->section_align = strtoul(p, &end, 16);
1523         } else if (link_option(option, "soname=", &p)) {
1524             s->soname = p;
1525             multi = 0;
1526 #ifdef TCC_TARGET_PE
1527         } else if (link_option(option, "subsystem=", &p)) {
1528 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1529             if (!strcmp(p, "native")) {
1530                 s->pe_subsystem = 1;
1531             } else if (!strcmp(p, "console")) {
1532                 s->pe_subsystem = 3;
1533             } else if (!strcmp(p, "gui")) {
1534                 s->pe_subsystem = 2;
1535             } else if (!strcmp(p, "posix")) {
1536                 s->pe_subsystem = 7;
1537             } else if (!strcmp(p, "efiapp")) {
1538                 s->pe_subsystem = 10;
1539             } else if (!strcmp(p, "efiboot")) {
1540                 s->pe_subsystem = 11;
1541             } else if (!strcmp(p, "efiruntime")) {
1542                 s->pe_subsystem = 12;
1543             } else if (!strcmp(p, "efirom")) {
1544                 s->pe_subsystem = 13;
1545 #elif defined(TCC_TARGET_ARM)
1546             if (!strcmp(p, "wince")) {
1547                 s->pe_subsystem = 9;
1548 #endif
1549             } else {
1550                 return p;
1551             }
1552 #endif
1553
1554         } else if (link_option(option, "Ttext=", &p)) {
1555             s->text_addr = strtoul(p, &end, 16);
1556             s->has_text_addr = 1;
1557
1558         } else {
1559             return option;
1560         }
1561
1562         if (multi) {
1563             option = NULL;
1564             p = strchr( (end) ? end : p, ',');
1565             if (p) {
1566                 *p = 0;    /* terminate last option */
1567                 option = ++p;
1568             }
1569         } else
1570             option = NULL;
1571     }
1572     return NULL;
1573 }
1574
1575 PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time)
1576 {
1577     double tt;
1578     tt = (double)total_time / 1000000.0;
1579     if (tt < 0.001)
1580         tt = 0.001;
1581     if (total_bytes < 1)
1582         total_bytes = 1;
1583     printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
1584            tok_ident - TOK_IDENT, total_lines, total_bytes,
1585            tt, (int)(total_lines / tt),
1586            total_bytes / tt / 1000000.0);
1587 }
1588
1589 /* set CONFIG_TCCDIR at runtime */
1590 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1591 {
1592     tcc_free(s->tcc_lib_path);
1593     s->tcc_lib_path = tcc_strdup(path);
1594 }
1595
1596 PUB_FUNC void set_num_callers(int n)
1597 {
1598 #ifdef CONFIG_TCC_BACKTRACE
1599     num_callers = n;
1600 #endif
1601 }
1602
1603
1604 LIBTCCAPI const char *tcc_default_target(TCCState *s)
1605 {
1606     /* FIXME will break in multithreaded case */
1607     static char outfile_default[1024];
1608
1609     char *ext;
1610     const char *name =
1611         strcmp(s->input_files[0], "-") == 0 ? "a"
1612                                             : tcc_basename(s->input_files[0]);
1613     pstrcpy(outfile_default, sizeof(outfile_default), name);
1614     ext = tcc_fileextension(outfile_default);
1615 #ifdef TCC_TARGET_PE
1616     if (s->output_type == TCC_OUTPUT_DLL)
1617         strcpy(ext, ".dll");
1618     else
1619     if (s->output_type == TCC_OUTPUT_EXE)
1620         strcpy(ext, ".exe");
1621     else
1622 #endif
1623     if (( (s->output_type == TCC_OUTPUT_OBJ && !s->reloc_output) ||
1624           (s->output_type == TCC_OUTPUT_PREPROCESS) )
1625         && *ext)
1626         strcpy(ext, ".o");
1627     else
1628         pstrcpy(outfile_default, sizeof(outfile_default), "a.out");
1629
1630     return outfile_default;
1631 }
1632
1633
1634 LIBTCCAPI void tcc_gen_makedeps(TCCState *s, const char *target, const char *filename)
1635 {
1636     FILE *depout;
1637     char buf[1024], *ext;
1638     int i;
1639
1640     if (!target)
1641         target = tcc_default_target(s);
1642
1643     if (!filename) {
1644         /* compute filename automatically
1645          * dir/file.o -> dir/file.d             */
1646         pstrcpy(buf, sizeof(buf), target);
1647         ext = tcc_fileextension(buf);
1648         pstrcpy(ext, sizeof(buf) - (ext-buf), ".d");
1649         filename = buf;
1650     }
1651
1652     if (s->verbose)
1653         printf("<- %s\n", filename);
1654
1655     /* XXX return err codes instead of error() ? */
1656     depout = fopen(filename, "w");
1657     if (!depout)
1658         error("could not open '%s'", filename);
1659
1660     fprintf(depout, "%s : \\\n", target);
1661     for (i=0; i<s->nb_target_deps; ++i)
1662         fprintf(depout, "\t%s \\\n", s->target_deps[i]);
1663     fprintf(depout, "\n");
1664     fclose(depout);
1665 }