libtcc.c

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