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.t & VT_WEAK)
 433             sym_bind = STB_WEAK;
 434         else
 435             sym_bind = STB_GLOBAL;
 436     }
 437
 438     if (!sym->c) {
 439         name = get_tok_str(sym->v, NULL);
 440 #ifdef CONFIG_TCC_BCHECK
 441         if (tcc_state->do_bounds_check) {
 442             char buf[32];
 443
 444             /* XXX: avoid doing that for statics ? */
 445             /* if bound checking is activated, we change some function
 446                names by adding the "__bound" prefix */
 447             switch(sym->v) {
 448 #ifdef TCC_TARGET_PE
 449             /* XXX: we rely only on malloc hooks */
 450             case TOK_malloc:
 451             case TOK_free:
 452             case TOK_realloc:
 453             case TOK_memalign:
 454             case TOK_calloc:
 455 #endif
 456             case TOK_memcpy:
 457             case TOK_memmove:
 458             case TOK_memset:
 459             case TOK_strlen:
 460             case TOK_strcpy:
 461             case TOK_alloca:
 462                 strcpy(buf, "__bound_");
 463                 strcat(buf, name);
 464                 name = buf;
 465                 break;
 466             }
 467         }
 468 #endif
 469         other = 0;
 470
 471 #ifdef TCC_TARGET_PE
 472         if (sym->type.t & VT_EXPORT)
 473             other |= 1;
 474         if (sym_type == STT_FUNC && sym->type.ref) {
 475             int attr = sym->type.ref->r;
 476             if (FUNC_EXPORT(attr))
 477                 other |= 1;
 478             if (FUNC_CALL(attr) == FUNC_STDCALL && can_add_underscore) {
 479                 sprintf(buf1, "_%s@%d", name, FUNC_ARGS(attr) * PTR_SIZE);
 480                 name = buf1;
 481                 other |= 2;
 482                 can_add_underscore = 0;
 483             }
 484         } else {
 485             if (find_elf_sym(tcc_state->dynsymtab_section, name))
 486                 other |= 4;
 487             if (sym->type.t & VT_IMPORT)
 488                 other |= 4;
 489         }
 490 #endif
 491         if (tcc_state->leading_underscore && can_add_underscore) {
 492             buf1[0] = '_';
 493             pstrcpy(buf1 + 1, sizeof(buf1) - 1, name);
 494             name = buf1;
 495         }
 496         if (sym->asm_label) {
 497             name = sym->asm_label;
 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     SValue *pvtop;
 693     char buf[512];
 694     volatile int section_sym;
 695
 696 #ifdef INC_DEBUG
 697     printf("%s: **** new file\n", file->filename);
 698 #endif
 699     preprocess_init(s1);
 700
 701     cur_text_section = NULL;
 702     funcname = "";
 703     anon_sym = SYM_FIRST_ANOM;
 704
 705     /* file info: full path + filename */
 706     section_sym = 0; /* avoid warning */
 707     if (s1->do_debug) {
 708         section_sym = put_elf_sym(symtab_section, 0, 0,
 709                                   ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
 710                                   text_section->sh_num, NULL);
 711         getcwd(buf, sizeof(buf));
 712 #ifdef _WIN32
 713         normalize_slashes(buf);
 714 #endif
 715         pstrcat(buf, sizeof(buf), "/");
 716         put_stabs_r(buf, N_SO, 0, 0,
 717                     text_section->data_offset, text_section, section_sym);
 718         put_stabs_r(file->filename, N_SO, 0, 0,
 719                     text_section->data_offset, text_section, section_sym);
 720     }
 721     /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
 722        symbols can be safely used */
 723     put_elf_sym(symtab_section, 0, 0,
 724                 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
 725                 SHN_ABS, file->filename);
 726
 727     /* define some often used types */
 728     int_type.t = VT_INT;
 729
 730     char_pointer_type.t = VT_BYTE;
 731     mk_pointer(&char_pointer_type);
 732
 733     func_old_type.t = VT_FUNC;
 734     func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
 735
 736 #if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP)
 737     float_type.t = VT_FLOAT;
 738     double_type.t = VT_DOUBLE;
 739
 740     func_float_type.t = VT_FUNC;
 741     func_float_type.ref = sym_push(SYM_FIELD, &float_type, FUNC_CDECL, FUNC_OLD);
 742     func_double_type.t = VT_FUNC;
 743     func_double_type.ref = sym_push(SYM_FIELD, &double_type, FUNC_CDECL, FUNC_OLD);
 744 #endif
 745
 746 #if 0
 747     /* define 'void *alloca(unsigned int)' builtin function */
 748     {
 749         Sym *s1;
 750
 751         p = anon_sym++;
 752         sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
 753         s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
 754         s1->next = NULL;
 755         sym->next = s1;
 756         sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
 757     }
 758 #endif
 759
 760     define_start = define_stack;
 761     nocode_wanted = 1;
 762     pvtop = vtop;
 763
 764     if (setjmp(s1->error_jmp_buf) == 0) {
 765         s1->nb_errors = 0;
 766         s1->error_set_jmp_enabled = 1;
 767
 768         ch = file->buf_ptr[0];
 769         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
 770         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
 771         next();
 772         decl(VT_CONST);
 773         if (tok != TOK_EOF)
 774             expect("declaration");
 775
 776         /* end of translation unit info */
 777         if (s1->do_debug) {
 778             put_stabs_r(NULL, N_SO, 0, 0,
 779                         text_section->data_offset, text_section, section_sym);
 780         }
 781     } else if (pvtop != vtop) {
 782         warning("internal compiler error: vstack leak? (%d)", vtop - pvtop);
 783     }
 784
 785     s1->error_set_jmp_enabled = 0;
 786
 787     /* reset define stack, but leave -Dsymbols (may be incorrect if
 788        they are undefined) */
 789     free_defines(define_start);
 790
 791     gen_inline_functions();
 792
 793     sym_pop(&global_stack, NULL);
 794     sym_pop(&local_stack, NULL);
 795
 796     return s1->nb_errors != 0 ? -1 : 0;
 797 }
 798
 799 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
 800 {
 801     int len, ret;
 802     len = strlen(str);
 803
 804     tcc_open_bf(s, "<string>", len);
 805     memcpy(file->buffer, str, len);
 806     ret = tcc_compile(s);
 807     tcc_close();
 808     return ret;
 809 }
 810
 811 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
 812 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
 813 {
 814     int len1, len2;
 815     /* default value */
 816     if (!value)
 817         value = "1";
 818     len1 = strlen(sym);
 819     len2 = strlen(value);
 820
 821     /* init file structure */
 822     tcc_open_bf(s1, "<define>", len1 + len2 + 1);
 823     memcpy(file->buffer, sym, len1);
 824     file->buffer[len1] = ' ';
 825     memcpy(file->buffer + len1 + 1, value, len2);
 826
 827     /* parse with define parser */
 828     ch = file->buf_ptr[0];
 829     next_nomacro();
 830     parse_define();
 831
 832     tcc_close();
 833 }
 834
 835 /* undefine a preprocessor symbol */
 836 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
 837 {
 838     TokenSym *ts;
 839     Sym *s;
 840     ts = tok_alloc(sym, strlen(sym));
 841     s = define_find(ts->tok);
 842     /* undefine symbol by putting an invalid name */
 843     if (s)
 844         define_undef(s);
 845 }
 846
 847 static void tcc_cleanup(void)
 848 {
 849     int i, n;
 850
 851     if (NULL == tcc_state)
 852         return;
 853     tcc_state = NULL;
 854
 855     /* free -D defines */
 856     free_defines(NULL);
 857
 858     /* free tokens */
 859     n = tok_ident - TOK_IDENT;
 860     for(i = 0; i < n; i++)
 861         tcc_free(table_ident[i]);
 862     tcc_free(table_ident);
 863
 864     /* free sym_pools */
 865     dynarray_reset(&sym_pools, &nb_sym_pools);
 866     /* string buffer */
 867     cstr_free(&tokcstr);
 868     /* reset symbol stack */
 869     sym_free_first = NULL;
 870     /* cleanup from error/setjmp */
 871     macro_ptr = NULL;
 872 }
 873
 874 LIBTCCAPI TCCState *tcc_new(void)
 875 {
 876     TCCState *s;
 877     char buffer[100];
 878     int a,b,c;
 879
 880     tcc_cleanup();
 881
 882     s = tcc_mallocz(sizeof(TCCState));
 883     if (!s)
 884         return NULL;
 885     tcc_state = s;
 886 #ifdef _WIN32
 887     tcc_set_lib_path_w32(s);
 888 #else
 889     tcc_set_lib_path(s, CONFIG_TCCDIR);
 890 #endif
 891     s->output_type = TCC_OUTPUT_MEMORY;
 892     preprocess_new();
 893     s->include_stack_ptr = s->include_stack;
 894
 895     /* we add dummy defines for some special macros to speed up tests
 896        and to have working defined() */
 897     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
 898     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
 899     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
 900     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
 901
 902     /* standard defines */
 903     tcc_define_symbol(s, "__STDC__", NULL);
 904     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
 905 #if defined(TCC_TARGET_I386)
 906     tcc_define_symbol(s, "__i386__", NULL);
 907     tcc_define_symbol(s, "__i386", NULL);
 908     tcc_define_symbol(s, "i386", NULL);
 909 #endif
 910 #if defined(TCC_TARGET_X86_64)
 911     tcc_define_symbol(s, "__x86_64__", NULL);
 912 #endif
 913 #if defined(TCC_TARGET_ARM)
 914     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
 915     tcc_define_symbol(s, "__arm_elf__", NULL);
 916     tcc_define_symbol(s, "__arm_elf", NULL);
 917     tcc_define_symbol(s, "arm_elf", NULL);
 918     tcc_define_symbol(s, "__arm__", NULL);
 919     tcc_define_symbol(s, "__arm", NULL);
 920     tcc_define_symbol(s, "arm", NULL);
 921     tcc_define_symbol(s, "__APCS_32__", NULL);
 922 #endif
 923 #ifdef TCC_TARGET_PE
 924     tcc_define_symbol(s, "_WIN32", NULL);
 925 #ifdef TCC_TARGET_X86_64
 926     tcc_define_symbol(s, "_WIN64", NULL);
 927 #endif
 928 #else
 929     tcc_define_symbol(s, "__unix__", NULL);
 930     tcc_define_symbol(s, "__unix", NULL);
 931     tcc_define_symbol(s, "unix", NULL);
 932 #if defined(__FreeBSD__)
 933 #define str(s) #s
 934     tcc_define_symbol(s, "__FreeBSD__", str( __FreeBSD__));
 935 #undef str
 936 #endif
 937 #if defined(__FreeBSD_kernel__)
 938     tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
 939 #endif
 940 #if defined(__linux)
 941     tcc_define_symbol(s, "__linux__", NULL);
 942     tcc_define_symbol(s, "__linux", NULL);
 943 #endif
 944 #endif
 945     /* tiny C specific defines */
 946     sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
 947     sprintf(buffer, "%d", a*10000 + b*100 + c);
 948     tcc_define_symbol(s, "__TINYC__", buffer);
 949
 950     /* tiny C & gcc defines */
 951 #if defined TCC_TARGET_PE && defined TCC_TARGET_X86_64
 952     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
 953     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
 954 #else
 955     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
 956     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
 957 #endif
 958
 959 #ifdef TCC_TARGET_PE
 960     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
 961 #else
 962     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
 963 #endif
 964
 965     /* glibc defines */
 966     tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)", "name proto __asm__ (#alias) __THROW");
 967
 968 #ifndef TCC_TARGET_PE
 969     /* default library paths */
 970     tcc_add_library_path(s, CONFIG_TCC_CRT_PREFIX);
 971     tcc_add_library_path(s, CONFIG_SYSROOT CONFIG_TCC_LDDIR);
 972     tcc_add_library_path(s, CONFIG_SYSROOT "/usr/local"CONFIG_TCC_LDDIR);
 973 #endif
 974
 975     /* no section zero */
 976     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
 977
 978     /* create standard sections */
 979     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
 980     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
 981     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
 982
 983     /* symbols are always generated for linking stage */
 984     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
 985                                 ".strtab",
 986                                 ".hashtab", SHF_PRIVATE);
 987     strtab_section = symtab_section->link;
 988
 989     /* private symbol table for dynamic symbols */
 990     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
 991                                       ".dynstrtab",
 992                                       ".dynhashtab", SHF_PRIVATE);
 993     s->alacarte_link = 1;
 994     s->nocommon = 1;
 995
 996 #ifdef CHAR_IS_UNSIGNED
 997     s->char_is_unsigned = 1;
 998 #endif
 999     /* enable this if you want symbols with leading underscore on windows: */
1000 #if defined(TCC_TARGET_PE) && 0
1001     s->leading_underscore = 1;
1002 #endif
1003     if (s->section_align == 0)
1004         s->section_align = ELF_PAGE_SIZE;
1005 #ifdef TCC_TARGET_I386
1006     s->seg_size = 32;
1007 #endif
1008     return s;
1009 }
1010
1011 LIBTCCAPI void tcc_delete(TCCState *s1)
1012 {
1013     int i;
1014
1015     tcc_cleanup();
1016
1017     /* free all sections */
1018     for(i = 1; i < s1->nb_sections; i++)
1019         free_section(s1->sections[i]);
1020     dynarray_reset(&s1->sections, &s1->nb_sections);
1021
1022     for(i = 0; i < s1->nb_priv_sections; i++)
1023         free_section(s1->priv_sections[i]);
1024     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1025
1026     /* free any loaded DLLs */
1027     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1028         DLLReference *ref = s1->loaded_dlls[i];
1029         if ( ref->handle )
1030             dlclose(ref->handle);
1031     }
1032
1033     /* free loaded dlls array */
1034     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1035
1036     /* free library paths */
1037     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1038
1039     /* free include paths */
1040     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1041     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1042     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1043
1044     tcc_free(s1->tcc_lib_path);
1045
1046     dynarray_reset(&s1->input_files, &s1->nb_input_files);
1047     dynarray_reset(&s1->input_libs, &s1->nb_input_libs);
1048     dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
1049
1050 #ifdef HAVE_SELINUX
1051     munmap (s1->write_mem, s1->mem_size);
1052     munmap (s1->runtime_mem, s1->mem_size);
1053 #else
1054     tcc_free(s1->runtime_mem);
1055 #endif
1056     tcc_free(s1);
1057 }
1058
1059 LIBTCCAPI int tcc_add_include_path(TCCState *s1, const char *pathname)
1060 {
1061     char *pathname1;
1062
1063     pathname1 = tcc_strdup(pathname);
1064     dynarray_add((void ***)&s1->include_paths, &s1->nb_include_paths, pathname1);
1065     return 0;
1066 }
1067
1068 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s1, const char *pathname)
1069 {
1070     char *pathname1;
1071
1072     pathname1 = tcc_strdup(pathname);
1073     dynarray_add((void ***)&s1->sysinclude_paths, &s1->nb_sysinclude_paths, pathname1);
1074     return 0;
1075 }
1076
1077 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1078 {
1079     const char *ext;
1080     ElfW(Ehdr) ehdr;
1081     int fd, ret, size;
1082
1083     /* find source file type with extension */
1084     ext = tcc_fileextension(filename);
1085     if (ext[0])
1086         ext++;
1087
1088 #ifdef CONFIG_TCC_ASM
1089     /* if .S file, define __ASSEMBLER__ like gcc does */
1090     if (!strcmp(ext, "S"))
1091         tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
1092 #endif
1093
1094     /* open the file */
1095     ret = tcc_open(s1, filename);
1096     if (ret < 0) {
1097         if (flags & AFF_PRINT_ERROR)
1098             error_noabort("file '%s' not found", filename);
1099         return ret;
1100     }
1101
1102     /* update target deps */
1103     dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1104             tcc_strdup(filename));
1105
1106     if (flags & AFF_PREPROCESS) {
1107         ret = tcc_preprocess(s1);
1108         goto the_end;
1109     }
1110
1111     if (!ext[0] || !PATHCMP(ext, "c")) {
1112         /* C file assumed */
1113         ret = tcc_compile(s1);
1114         goto the_end;
1115     }
1116
1117 #ifdef CONFIG_TCC_ASM
1118     if (!strcmp(ext, "S")) {
1119         /* preprocessed assembler */
1120         ret = tcc_assemble(s1, 1);
1121         goto the_end;
1122     }
1123
1124     if (!strcmp(ext, "s")) {
1125         /* non preprocessed assembler */
1126         ret = tcc_assemble(s1, 0);
1127         goto the_end;
1128     }
1129 #endif
1130
1131     fd = file->fd;
1132     /* assume executable format: auto guess file type */
1133     size = read(fd, &ehdr, sizeof(ehdr));
1134     lseek(fd, 0, SEEK_SET);
1135     if (size <= 0) {
1136         error_noabort("could not read header");
1137         goto the_end;
1138     }
1139
1140     if (size == sizeof(ehdr) &&
1141         ehdr.e_ident[0] == ELFMAG0 &&
1142         ehdr.e_ident[1] == ELFMAG1 &&
1143         ehdr.e_ident[2] == ELFMAG2 &&
1144         ehdr.e_ident[3] == ELFMAG3) {
1145
1146         /* do not display line number if error */
1147         file->line_num = 0;
1148         if (ehdr.e_type == ET_REL) {
1149             ret = tcc_load_object_file(s1, fd, 0);
1150             goto the_end;
1151
1152         }
1153 #ifndef TCC_TARGET_PE
1154         if (ehdr.e_type == ET_DYN) {
1155             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1156                 void *h;
1157                 h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1158                 if (h)
1159                     ret = 0;
1160             } else {
1161                 ret = tcc_load_dll(s1, fd, filename,
1162                                    (flags & AFF_REFERENCED_DLL) != 0);
1163             }
1164             goto the_end;
1165         }
1166 #endif
1167         error_noabort("unrecognized ELF file");
1168         goto the_end;
1169     }
1170
1171     if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
1172         file->line_num = 0; /* do not display line number if error */
1173         ret = tcc_load_archive(s1, fd);
1174         goto the_end;
1175     }
1176
1177 #ifdef TCC_TARGET_COFF
1178     if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
1179         ret = tcc_load_coff(s1, fd);
1180         goto the_end;
1181     }
1182 #endif
1183
1184 #ifdef TCC_TARGET_PE
1185     ret = pe_load_file(s1, filename, fd);
1186 #else
1187     /* as GNU ld, consider it is an ld script if not recognized */
1188     ret = tcc_load_ldscript(s1);
1189 #endif
1190     if (ret < 0)
1191         error_noabort("unrecognized file type");
1192
1193 the_end:
1194     tcc_close();
1195     return ret;
1196 }
1197
1198 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1199 {
1200     dynarray_add((void ***)&s->input_files, &s->nb_input_files, tcc_strdup(filename));
1201
1202     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1203         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS);
1204     else
1205         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR);
1206 }
1207
1208 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1209 {
1210     char *pathname1;
1211
1212     pathname1 = tcc_strdup(pathname);
1213     dynarray_add((void ***)&s->library_paths, &s->nb_library_paths, pathname1);
1214     return 0;
1215 }
1216
1217 /* find and load a dll. Return non zero if not found */
1218 /* XXX: add '-rpath' option support ? */
1219 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1220 {
1221     char buf[1024];
1222     int i;
1223
1224     for(i = 0; i < s->nb_library_paths; i++) {
1225         snprintf(buf, sizeof(buf), "%s/%s",
1226                  s->library_paths[i], filename);
1227         if (tcc_add_file_internal(s, buf, flags) == 0)
1228             return 0;
1229     }
1230     return -1;
1231 }
1232
1233 /* the library name is the same as the argument of the '-l' option */
1234 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1235 {
1236     char buf[1024];
1237     int i;
1238
1239     dynarray_add((void ***)&s->input_libs, &s->nb_input_libs, tcc_strdup(libraryname));
1240
1241     /* first we look for the dynamic library if not static linking */
1242     if (!s->static_link) {
1243 #ifdef TCC_TARGET_PE
1244         if (pe_add_dll(s, libraryname) == 0)
1245             return 0;
1246 #else
1247         snprintf(buf, sizeof(buf), "lib%s.so", libraryname);
1248         if (tcc_add_dll(s, buf, 0) == 0)
1249             return 0;
1250 #endif
1251     }
1252     /* then we look for the static library */
1253     for(i = 0; i < s->nb_library_paths; i++) {
1254         snprintf(buf, sizeof(buf), "%s/lib%s.a",
1255                  s->library_paths[i], libraryname);
1256         if (tcc_add_file_internal(s, buf, 0) == 0)
1257             return 0;
1258     }
1259     return -1;
1260 }
1261
1262 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1263 {
1264 #ifdef TCC_TARGET_PE
1265     pe_putimport(s, 0, name, val);
1266 #else
1267     add_elf_sym(symtab_section, (uplong)val, 0,
1268                 ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1269                 SHN_ABS, name);
1270 #endif
1271     return 0;
1272 }
1273
1274 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
1275 {
1276     char buf[1024];
1277
1278     s->output_type = output_type;
1279
1280     if (!s->nostdinc) {
1281         /* default include paths */
1282         /* -isystem paths have already been handled */
1283 #ifndef TCC_TARGET_PE
1284         tcc_add_sysinclude_path(s, CONFIG_SYSROOT "/usr/local/include");
1285         tcc_add_sysinclude_path(s, CONFIG_SYSROOT "/usr/include");
1286 #endif
1287         snprintf(buf, sizeof(buf), "%s/include", s->tcc_lib_path);
1288         tcc_add_sysinclude_path(s, buf);
1289 #ifdef TCC_TARGET_PE
1290         snprintf(buf, sizeof(buf), "%s/include/winapi", s->tcc_lib_path);
1291         tcc_add_sysinclude_path(s, buf);
1292 #endif
1293     }
1294
1295     /* if bound checking, then add corresponding sections */
1296 #ifdef CONFIG_TCC_BCHECK
1297     if (s->do_bounds_check) {
1298         /* define symbol */
1299         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1300         /* create bounds sections */
1301         bounds_section = new_section(s, ".bounds",
1302                                      SHT_PROGBITS, SHF_ALLOC);
1303         lbounds_section = new_section(s, ".lbounds",
1304                                       SHT_PROGBITS, SHF_ALLOC);
1305     }
1306 #endif
1307
1308     if (s->char_is_unsigned) {
1309         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
1310     }
1311
1312     /* add debug sections */
1313     if (s->do_debug) {
1314         /* stab symbols */
1315         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
1316         stab_section->sh_entsize = sizeof(Stab_Sym);
1317         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
1318         put_elf_str(stabstr_section, "");
1319         stab_section->link = stabstr_section;
1320         /* put first entry */
1321         put_stabs("", 0, 0, 0, 0);
1322     }
1323
1324     /* add libc crt1/crti objects */
1325 #ifndef TCC_TARGET_PE
1326     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1327         !s->nostdlib) {
1328         if (output_type != TCC_OUTPUT_DLL)
1329             tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crt1.o");
1330         tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crti.o");
1331     }
1332 #endif
1333
1334 #ifdef TCC_TARGET_PE
1335 #ifdef CONFIG_TCC_CROSSLIB
1336     snprintf(buf, sizeof(buf), "%s/" CONFIG_TCC_CROSSLIB, s->tcc_lib_path);
1337     tcc_add_library_path(s, buf);
1338 #endif
1339     snprintf(buf, sizeof(buf), "%s/lib", s->tcc_lib_path);
1340     tcc_add_library_path(s, buf);
1341 #ifdef _WIN32
1342     if (GetSystemDirectory(buf, sizeof buf))
1343         tcc_add_library_path(s, buf);
1344 #endif
1345 #endif
1346
1347     return 0;
1348 }
1349
1350 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1351 #define FD_INVERT 0x0002 /* invert value before storing */
1352
1353 typedef struct FlagDef {
1354     uint16_t offset;
1355     uint16_t flags;
1356     const char *name;
1357 } FlagDef;
1358
1359 static const FlagDef warning_defs[] = {
1360     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1361     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1362     { offsetof(TCCState, warn_error), 0, "error" },
1363     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1364       "implicit-function-declaration" },
1365 };
1366
1367 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1368                     const char *name, int value)
1369 {
1370     int i;
1371     const FlagDef *p;
1372     const char *r;
1373
1374     r = name;
1375     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
1376         r += 3;
1377         value = !value;
1378     }
1379     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1380         if (!strcmp(r, p->name))
1381             goto found;
1382     }
1383     return -1;
1384  found:
1385     if (p->flags & FD_INVERT)
1386         value = !value;
1387     *(int *)((uint8_t *)s + p->offset) = value;
1388     return 0;
1389 }
1390
1391 /* set/reset a warning */
1392 LIBTCCAPI int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1393 {
1394     int i;
1395     const FlagDef *p;
1396
1397     if (!strcmp(warning_name, "all")) {
1398         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1399             if (p->flags & WD_ALL)
1400                 *(int *)((uint8_t *)s + p->offset) = 1;
1401         }
1402         return 0;
1403     } else {
1404         return set_flag(s, warning_defs, countof(warning_defs),
1405                         warning_name, value);
1406     }
1407 }
1408
1409 static const FlagDef flag_defs[] = {
1410     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1411     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1412     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1413     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1414 };
1415
1416 /* set/reset a flag */
1417 PUB_FUNC int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1418 {
1419     return set_flag(s, flag_defs, countof(flag_defs),
1420                     flag_name, value);
1421 }
1422
1423
1424 static int strstart(const char *str, const char *val, char **ptr)
1425 {
1426     const char *p, *q;
1427     p = str;
1428     q = val;
1429     while (*q != '\0') {
1430         if (*p != *q)
1431             return 0;
1432         p++;
1433         q++;
1434     }
1435     if (ptr)
1436         *ptr = (char *) p;
1437     return 1;
1438 }
1439
1440
1441 /* Like strstart, but automatically takes into account that ld options can
1442  *
1443  * - start with double or single dash (e.g. '--soname' or '-soname')
1444  * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1445  *   or '-Wl,-soname=x.so')
1446  *
1447  * you provide `val` always in 'option[=]' form (no leading -)
1448  */
1449 static int link_option(const char *str, const char *val, char **ptr)
1450 {
1451     const char *p, *q;
1452
1453     /* there should be 1 or 2 dashes */
1454     if (*str++ != '-')
1455         return 0;
1456     if (*str == '-')
1457         str++;
1458
1459     /* then str & val should match (potentialy up to '=') */
1460     p = str;
1461     q = val;
1462
1463     while (*q != '\0' && *q != '=') {
1464         if (*p != *q)
1465             return 0;
1466         p++;
1467         q++;
1468     }
1469
1470     /* '=' near eos means ',' or '=' is ok */
1471     if (*q == '=') {
1472         if (*p != ',' && *p != '=')
1473             return 0;
1474         p++;
1475         q++;
1476     }
1477
1478     if (ptr)
1479         *ptr = (char *) p;
1480     return 1;
1481 }
1482
1483
1484 /* set linker options */
1485 PUB_FUNC const char * tcc_set_linker(TCCState *s, char *option, int multi)
1486 {
1487     char *p = option;
1488     char *end;
1489
1490     while (option && *option) {
1491         end = NULL;
1492         if (link_option(option, "Bsymbolic", &p)) {
1493             s->symbolic = TRUE;
1494 #ifdef TCC_TARGET_PE
1495         } else if (link_option(option, "file-alignment=", &p)) {
1496             s->pe_file_align = strtoul(p, &end, 16);
1497 #endif
1498         } else if (link_option(option, "fini=", &p)) {
1499             s->fini_symbol = p;
1500             if (s->warn_unsupported)
1501                 warning("ignoring -fini %s", p);
1502
1503         } else if (link_option(option, "image-base=", &p)) {
1504             s->text_addr = strtoul(p, &end, 16);
1505             s->has_text_addr = 1;
1506         } else if (link_option(option, "init=", &p)) {
1507             s->init_symbol = p;
1508             if (s->warn_unsupported)
1509                 warning("ignoring -init %s", p);
1510
1511         } else if (link_option(option, "oformat=", &p)) {
1512 #if defined(TCC_TARGET_PE)
1513             if (strstart(p, "pe-", NULL)) {
1514 #else
1515 #if defined(TCC_TARGET_X86_64)
1516             if (strstart(p, "elf64-", NULL)) {
1517 #else
1518             if (strstart(p, "elf32-", NULL)) {
1519 #endif
1520 #endif
1521                 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1522             } else if (!strcmp(p, "binary")) {
1523                 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1524             } else
1525 #ifdef TCC_TARGET_COFF
1526             if (!strcmp(p, "coff")) {
1527                 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1528             } else
1529 #endif
1530             {
1531                 return p;
1532             }
1533
1534         } else if (link_option(option, "rpath=", &p)) {
1535             s->rpath = p;
1536         } else if (link_option(option, "section-alignment=", &p)) {
1537             s->section_align = strtoul(p, &end, 16);
1538         } else if (link_option(option, "soname=", &p)) {
1539             s->soname = p;
1540             multi = 0;
1541 #ifdef TCC_TARGET_PE
1542         } else if (link_option(option, "subsystem=", &p)) {
1543 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1544             if (!strcmp(p, "native")) {
1545                 s->pe_subsystem = 1;
1546             } else if (!strcmp(p, "console")) {
1547                 s->pe_subsystem = 3;
1548             } else if (!strcmp(p, "gui")) {
1549                 s->pe_subsystem = 2;
1550             } else if (!strcmp(p, "posix")) {
1551                 s->pe_subsystem = 7;
1552             } else if (!strcmp(p, "efiapp")) {
1553                 s->pe_subsystem = 10;
1554             } else if (!strcmp(p, "efiboot")) {
1555                 s->pe_subsystem = 11;
1556             } else if (!strcmp(p, "efiruntime")) {
1557                 s->pe_subsystem = 12;
1558             } else if (!strcmp(p, "efirom")) {
1559                 s->pe_subsystem = 13;
1560 #elif defined(TCC_TARGET_ARM)
1561             if (!strcmp(p, "wince")) {
1562                 s->pe_subsystem = 9;
1563 #endif
1564             } else {
1565                 return p;
1566             }
1567 #endif
1568
1569         } else if (link_option(option, "Ttext=", &p)) {
1570             s->text_addr = strtoul(p, &end, 16);
1571             s->has_text_addr = 1;
1572
1573         } else {
1574             return option;
1575         }
1576
1577         if (multi) {
1578             option = NULL;
1579             p = strchr( (end) ? end : p, ',');
1580             if (p) {
1581                 *p = 0;    /* terminate last option */
1582                 option = ++p;
1583             }
1584         } else
1585             option = NULL;
1586     }
1587     return NULL;
1588 }
1589
1590 PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time)
1591 {
1592     double tt;
1593     tt = (double)total_time / 1000000.0;
1594     if (tt < 0.001)
1595         tt = 0.001;
1596     if (total_bytes < 1)
1597         total_bytes = 1;
1598     printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
1599            tok_ident - TOK_IDENT, total_lines, total_bytes,
1600            tt, (int)(total_lines / tt),
1601            total_bytes / tt / 1000000.0);
1602 }
1603
1604 /* set CONFIG_TCCDIR at runtime */
1605 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1606 {
1607     tcc_free(s->tcc_lib_path);
1608     s->tcc_lib_path = tcc_strdup(path);
1609 }
1610
1611 PUB_FUNC void set_num_callers(int n)
1612 {
1613 #ifdef CONFIG_TCC_BACKTRACE
1614     num_callers = n;
1615 #endif
1616 }
1617
1618
1619 LIBTCCAPI const char *tcc_default_target(TCCState *s)
1620 {
1621     /* FIXME will break in multithreaded case */
1622     static char outfile_default[1024];
1623
1624     char *ext;
1625     const char *name =
1626         strcmp(s->input_files[0], "-") == 0 ? "a"
1627                                             : tcc_basename(s->input_files[0]);
1628     pstrcpy(outfile_default, sizeof(outfile_default), name);
1629     ext = tcc_fileextension(outfile_default);
1630 #ifdef TCC_TARGET_PE
1631     if (s->output_type == TCC_OUTPUT_DLL)
1632         strcpy(ext, ".dll");
1633     else
1634     if (s->output_type == TCC_OUTPUT_EXE)
1635         strcpy(ext, ".exe");
1636     else
1637 #endif
1638     if (( (s->output_type == TCC_OUTPUT_OBJ && !s->reloc_output) ||
1639           (s->output_type == TCC_OUTPUT_PREPROCESS) )
1640         && *ext)
1641         strcpy(ext, ".o");
1642     else
1643         pstrcpy(outfile_default, sizeof(outfile_default), "a.out");
1644
1645     return outfile_default;
1646 }
1647
1648
1649 LIBTCCAPI void tcc_gen_makedeps(TCCState *s, const char *target, const char *filename)
1650 {
1651     FILE *depout;
1652     char buf[1024], *ext;
1653     int i;
1654
1655     if (!target)
1656         target = tcc_default_target(s);
1657
1658     if (!filename) {
1659         /* compute filename automatically
1660          * dir/file.o -> dir/file.d             */
1661         pstrcpy(buf, sizeof(buf), target);
1662         ext = tcc_fileextension(buf);
1663         pstrcpy(ext, sizeof(buf) - (ext-buf), ".d");
1664         filename = buf;
1665     }
1666
1667     if (s->verbose)
1668         printf("<- %s\n", filename);
1669
1670     /* XXX return err codes instead of error() ? */
1671     depout = fopen(filename, "w");
1672     if (!depout)
1673         error("could not open '%s'", filename);
1674
1675     fprintf(depout, "%s : \\\n", target);
1676     for (i=0; i<s->nb_target_deps; ++i)
1677         fprintf(depout, "\t%s \\\n", s->target_deps[i]);
1678     fprintf(depout, "\n");
1679     fclose(depout);
1680 }