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 /* display benchmark infos */
  27 int total_lines;
  28 int total_bytes;
  29
  30 /* parser */
  31 static struct BufferedFile *file;
  32 static int ch, tok;
  33 static CValue tokc;
  34 static CString tokcstr; /* current parsed string, if any */
  35 /* additional informations about token */
  36 static int tok_flags;
  37 #define TOK_FLAG_BOL   0x0001 /* beginning of line before */
  38 #define TOK_FLAG_BOF   0x0002 /* beginning of file before */
  39 #define TOK_FLAG_ENDIF 0x0004 /* a endif was found matching starting #ifdef */
  40 #define TOK_FLAG_EOF   0x0008 /* end of file */
  41
  42 static int *macro_ptr, *macro_ptr_allocated;
  43 static int *unget_saved_macro_ptr;
  44 static int unget_saved_buffer[TOK_MAX_SIZE + 1];
  45 static int unget_buffer_enabled;
  46 static int parse_flags;
  47 #define PARSE_FLAG_PREPROCESS 0x0001 /* activate preprocessing */
  48 #define PARSE_FLAG_TOK_NUM    0x0002 /* return numbers instead of TOK_PPNUM */
  49 #define PARSE_FLAG_LINEFEED   0x0004 /* line feed is returned as a
  50                                         token. line feed is also
  51                                         returned at eof */
  52 #define PARSE_FLAG_ASM_COMMENTS 0x0008 /* '#' can be used for line comment */
  53 #define PARSE_FLAG_SPACES     0x0010 /* next() returns space tokens (for -E) */
  54
  55 static Section *text_section, *data_section, *bss_section; /* predefined sections */
  56 static Section *cur_text_section; /* current section where function code is
  57                               generated */
  58 #ifdef CONFIG_TCC_ASM
  59 static Section *last_text_section; /* to handle .previous asm directive */
  60 #endif
  61
  62 #ifdef CONFIG_TCC_BCHECK
  63 /* bound check related sections */
  64 static Section *bounds_section; /* contains global data bound description */
  65 static Section *lbounds_section; /* contains local data bound description */
  66 #endif
  67
  68 /* symbol sections */
  69 static Section *symtab_section, *strtab_section;
  70
  71 /* debug sections */
  72 static Section *stab_section, *stabstr_section;
  73
  74 /* loc : local variable index
  75    ind : output code index
  76    rsym: return symbol
  77    anon_sym: anonymous symbol index
  78 */
  79 static int rsym, anon_sym, ind, loc;
  80 /* expression generation modifiers */
  81 static int const_wanted; /* true if constant wanted */
  82 static int nocode_wanted; /* true if no code generation wanted for an expression */
  83 static int global_expr;  /* true if compound literals must be allocated
  84                             globally (used during initializers parsing */
  85 static CType func_vt; /* current function return type (used by return
  86                          instruction) */
  87 static int func_vc;
  88 static int last_line_num, last_ind, func_ind; /* debug last line number and pc */
  89 static int tok_ident;
  90 static TokenSym **table_ident;
  91 static TokenSym *hash_ident[TOK_HASH_SIZE];
  92 static char token_buf[STRING_MAX_SIZE + 1];
  93 static char *funcname;
  94 static Sym *global_stack, *local_stack;
  95 static Sym *define_stack;
  96 static Sym *global_label_stack, *local_label_stack;
  97 /* symbol allocator */
  98 #define SYM_POOL_NB (8192 / sizeof(Sym))
  99 static Sym *sym_free_first;
 100 static void **sym_pools;
 101 static int nb_sym_pools;
 102
 103 static SValue vstack[VSTACK_SIZE], *vtop;
 104 /* some predefined types */
 105 static CType char_pointer_type, func_old_type, int_type;
 106
 107 /* use GNU C extensions */
 108 static int gnu_ext = 1;
 109
 110 /* use Tiny C extensions */
 111 static int tcc_ext = 1;
 112
 113 /* max number of callers shown if error */
 114 #ifdef CONFIG_TCC_BACKTRACE
 115 int num_callers = 6;
 116 void *rt_prog_main;
 117 const char **rt_bound_error_msg;
 118 #endif
 119
 120 /* XXX: get rid of this ASAP */
 121 static struct TCCState *tcc_state;
 122
 123 /********************************************************/
 124 /* function prototypes */
 125
 126 /* tccpp.c */
 127 static void next(void);
 128 char *get_tok_str(int v, CValue *cv);
 129
 130 /* tccgen.c */
 131 static void parse_expr_type(CType *type);
 132 static void expr_type(CType *type);
 133 static void unary_type(CType *type);
 134 static void block(int *bsym, int *csym, int *case_sym, int *def_sym,
 135                   int case_reg, int is_expr);
 136 static int expr_const(void);
 137 static void expr_eq(void);
 138 static void gexpr(void);
 139 static void gen_inline_functions(void);
 140 static void decl(int l);
 141 static void decl_initializer(CType *type, Section *sec, unsigned long c,
 142                              int first, int size_only);
 143 static void decl_initializer_alloc(CType *type, AttributeDef *ad, int r,
 144                                    int has_init, int v, int scope);
 145 int gv(int rc);
 146 void gv2(int rc1, int rc2);
 147 void move_reg(int r, int s);
 148 void save_regs(int n);
 149 void save_reg(int r);
 150 void vpop(void);
 151 void vswap(void);
 152 void vdup(void);
 153 int get_reg(int rc);
 154 int get_reg_ex(int rc,int rc2);
 155
 156 void gen_op(int op);
 157 void force_charshort_cast(int t);
 158 static void gen_cast(CType *type);
 159 void vstore(void);
 160 static Sym *sym_find(int v);
 161 static Sym *sym_push(int v, CType *type, int r, int c);
 162
 163 /* type handling */
 164 static int type_size(CType *type, int *a);
 165 static inline CType *pointed_type(CType *type);
 166 static int pointed_size(CType *type);
 167 static int lvalue_type(int t);
 168 static int parse_btype(CType *type, AttributeDef *ad);
 169 static void type_decl(CType *type, AttributeDef *ad, int *v, int td);
 170 static int compare_types(CType *type1, CType *type2, int unqualified);
 171 static int is_compatible_types(CType *type1, CType *type2);
 172 static int is_compatible_parameter_types(CType *type1, CType *type2);
 173
 174 int ieee_finite(double d);
 175 void vpushi(int v);
 176 void vpushll(long long v);
 177 void vrott(int n);
 178 void vnrott(int n);
 179 void lexpand_nr(void);
 180 static void vpush_global_sym(CType *type, int v);
 181 void vset(CType *type, int r, int v);
 182 void type_to_str(char *buf, int buf_size,
 183                  CType *type, const char *varstr);
 184 static Sym *get_sym_ref(CType *type, Section *sec,
 185                         unsigned long offset, unsigned long size);
 186 static Sym *external_global_sym(int v, CType *type, int r);
 187
 188 /* section generation */
 189 static void section_realloc(Section *sec, unsigned long new_size);
 190 static void *section_ptr_add(Section *sec, unsigned long size);
 191 static void put_extern_sym(Sym *sym, Section *section,
 192                            unsigned long value, unsigned long size);
 193 static void greloc(Section *s, Sym *sym, unsigned long addr, int type);
 194 static int put_elf_str(Section *s, const char *sym);
 195 static int put_elf_sym(Section *s,
 196                        unsigned long value, unsigned long size,
 197                        int info, int other, int shndx, const char *name);
 198 static int add_elf_sym(Section *s, uplong value, unsigned long size,
 199                        int info, int other, int sh_num, const char *name);
 200 static void put_elf_reloc(Section *symtab, Section *s, unsigned long offset,
 201                           int type, int symbol);
 202 static void put_stabs(const char *str, int type, int other, int desc,
 203                       unsigned long value);
 204 static void put_stabs_r(const char *str, int type, int other, int desc,
 205                         unsigned long value, Section *sec, int sym_index);
 206 static void put_stabn(int type, int other, int desc, int value);
 207 static void put_stabd(int type, int other, int desc);
 208 static int tcc_add_dll(TCCState *s, const char *filename, int flags);
 209
 210 #define AFF_PRINT_ERROR     0x0001 /* print error if file not found */
 211 #define AFF_REFERENCED_DLL  0x0002 /* load a referenced dll from another dll */
 212 #define AFF_PREPROCESS      0x0004 /* preprocess file */
 213 static int tcc_add_file_internal(TCCState *s, const char *filename, int flags);
 214
 215 /* tcccoff.c */
 216 int tcc_output_coff(TCCState *s1, FILE *f);
 217
 218 /* tccpe.c */
 219 int pe_load_file(struct TCCState *s1, const char *filename, int fd);
 220 int pe_output_file(struct TCCState *s1, const char *filename);
 221 int pe_dllimport(int r, SValue *sv, void (*fn)(int r, SValue *sv));
 222
 223 /* tccasm.c */
 224 #ifdef CONFIG_TCC_ASM
 225 static void asm_expr(TCCState *s1, ExprValue *pe);
 226 static int asm_int_expr(TCCState *s1);
 227 static int find_constraint(ASMOperand *operands, int nb_operands,
 228                            const char *name, const char **pp);
 229
 230 static int tcc_assemble(TCCState *s1, int do_preprocess);
 231 #endif
 232
 233 static void asm_instr(void);
 234 static void asm_global_instr(void);
 235
 236 /********************************************************/
 237 /* libtcc.c */
 238
 239 static Sym *__sym_malloc(void);
 240 static inline Sym *sym_malloc(void);
 241 static inline void sym_free(Sym *sym);
 242 Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags);
 243 static void free_section(Section *s);
 244 static void section_realloc(Section *sec, unsigned long new_size);
 245 static void *section_ptr_add(Section *sec, unsigned long size);
 246 Section *find_section(TCCState *s1, const char *name);
 247 static void put_extern_sym2(
 248     Sym *sym, Section *section,
 249     unsigned long value, unsigned long size, int can_add_underscore);
 250 static void put_extern_sym(
 251     Sym *sym, Section *section,
 252     unsigned long value, unsigned long size);
 253 static void greloc(Section *s, Sym *sym, unsigned long offset, int type);
 254
 255 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap);
 256 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...);
 257
 258 /* CString handling */
 259 static void cstr_realloc(CString *cstr, int new_size);
 260 static inline void cstr_ccat(CString *cstr, int ch);
 261 static void cstr_cat(CString *cstr, const char *str);
 262 static void cstr_wccat(CString *cstr, int ch);
 263 static void cstr_new(CString *cstr);
 264 static void cstr_free(CString *cstr);
 265 #define cstr_reset(cstr) cstr_free(cstr)
 266 static void add_char(CString *cstr, int c);
 267
 268 static Sym *sym_push2(Sym **ps, int v, int t, long c);
 269 static Sym *sym_find2(Sym *s, int v);
 270 static inline Sym *struct_find(int v);
 271 static inline Sym *sym_find(int v);
 272 static Sym *sym_push(int v, CType *type, int r, int c);
 273 static Sym *global_identifier_push(int v, int t, int c);
 274 static void sym_pop(Sym **ptop, Sym *b);
 275
 276 BufferedFile *tcc_open(TCCState *s1, const char *filename);
 277 void tcc_close(BufferedFile *bf);
 278 static int tcc_compile(TCCState *s1);
 279
 280 void expect(const char *msg);
 281 void skip(int c);
 282 static void test_lvalue(void);
 283 void *resolve_sym(TCCState *s1, const char *sym);
 284
 285 static inline int isid(int c)
 286 {
 287     return (c >= 'a' && c <= 'z')
 288         || (c >= 'A' && c <= 'Z')
 289         || c == '_';
 290 }
 291
 292 static inline int isnum(int c)
 293 {
 294     return c >= '0' && c <= '9';
 295 }
 296
 297 static inline int isoct(int c)
 298 {
 299     return c >= '0' && c <= '7';
 300 }
 301
 302 static inline int toup(int c)
 303 {
 304     if (c >= 'a' && c <= 'z')
 305         return c - 'a' + 'A';
 306     else
 307         return c;
 308 }
 309
 310 /********************************************************/
 311
 312 #ifdef TCC_TARGET_I386
 313 #include "i386-gen.c"
 314 #endif
 315
 316 #ifdef TCC_TARGET_ARM
 317 #include "arm-gen.c"
 318 #endif
 319
 320 #ifdef TCC_TARGET_C67
 321 #include "c67-gen.c"
 322 #endif
 323
 324 #ifdef TCC_TARGET_X86_64
 325 #include "x86_64-gen.c"
 326 #endif
 327
 328 #include "tccpp.c"
 329 #include "tccgen.c"
 330
 331 #ifdef CONFIG_TCC_ASM
 332
 333 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
 334 #include "i386-asm.c"
 335 #endif
 336
 337 #include "tccasm.c"
 338 #else
 339 static void asm_instr(void)
 340 {
 341     error("inline asm() not supported");
 342 }
 343 static void asm_global_instr(void)
 344 {
 345     error("inline asm() not supported");
 346 }
 347 #endif
 348
 349 #include "tccelf.c"
 350
 351 #ifdef TCC_TARGET_COFF
 352 #include "tcccoff.c"
 353 #endif
 354
 355 #ifdef TCC_TARGET_PE
 356 #include "tccpe.c"
 357 #endif
 358
 359 #include "tccrun.c"
 360
 361 /********************************************************/
 362 #ifdef _WIN32
 363 char *normalize_slashes(char *path)
 364 {
 365     char *p;
 366     for (p = path; *p; ++p)
 367         if (*p == '\\')
 368             *p = '/';
 369     return path;
 370 }
 371
 372 HMODULE tcc_module;
 373
 374 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
 375 void tcc_set_lib_path_w32(TCCState *s)
 376 {
 377     char path[1024], *p;
 378     GetModuleFileNameA(tcc_module, path, sizeof path);
 379     p = tcc_basename(normalize_slashes(strlwr(path)));
 380     if (p - 5 > path && 0 == strncmp(p - 5, "/bin/", 5))
 381         p -= 5;
 382     else if (p > path)
 383         p--;
 384     *p = 0;
 385     tcc_set_lib_path(s, path);
 386 }
 387
 388 #ifdef LIBTCC_AS_DLL
 389 BOOL WINAPI DllMain (HANDLE hDll, DWORD dwReason, LPVOID lpReserved)
 390 {
 391     if (DLL_PROCESS_ATTACH == dwReason)
 392         tcc_module = hDll;
 393     return TRUE;
 394 }
 395 #endif
 396 #endif
 397
 398 /********************************************************/
 399
 400 /* we use our own 'finite' function to avoid potential problems with
 401    non standard math libs */
 402 /* XXX: endianness dependent */
 403 int ieee_finite(double d)
 404 {
 405     int *p = (int *)&d;
 406     return ((unsigned)((p[1] | 0x800fffff) + 1)) >> 31;
 407 }
 408
 409 /* copy a string and truncate it. */
 410 char *pstrcpy(char *buf, int buf_size, const char *s)
 411 {
 412     char *q, *q_end;
 413     int c;
 414
 415     if (buf_size > 0) {
 416         q = buf;
 417         q_end = buf + buf_size - 1;
 418         while (q < q_end) {
 419             c = *s++;
 420             if (c == '\0')
 421                 break;
 422             *q++ = c;
 423         }
 424         *q = '\0';
 425     }
 426     return buf;
 427 }
 428
 429 /* strcat and truncate. */
 430 char *pstrcat(char *buf, int buf_size, const char *s)
 431 {
 432     int len;
 433     len = strlen(buf);
 434     if (len < buf_size)
 435         pstrcpy(buf + len, buf_size - len, s);
 436     return buf;
 437 }
 438
 439 /* extract the basename of a file */
 440 char *tcc_basename(const char *name)
 441 {
 442     char *p = strchr(name, 0);
 443     while (p > name && !IS_PATHSEP(p[-1]))
 444         --p;
 445     return p;
 446 }
 447
 448 char *tcc_fileextension (const char *name)
 449 {
 450     char *b = tcc_basename(name);
 451     char *e = strrchr(b, '.');
 452     return e ? e : strchr(b, 0);
 453 }
 454
 455 /* memory management */
 456 #ifdef MEM_DEBUG
 457 int mem_cur_size;
 458 int mem_max_size;
 459 unsigned malloc_usable_size(void*);
 460 #endif
 461
 462 void tcc_free(void *ptr)
 463 {
 464 #ifdef MEM_DEBUG
 465     mem_cur_size -= malloc_usable_size(ptr);
 466 #endif
 467     free(ptr);
 468 }
 469
 470 void *tcc_malloc(unsigned long size)
 471 {
 472     void *ptr;
 473     ptr = malloc(size);
 474     if (!ptr && size)
 475         error("memory full");
 476 #ifdef MEM_DEBUG
 477     mem_cur_size += malloc_usable_size(ptr);
 478     if (mem_cur_size > mem_max_size)
 479         mem_max_size = mem_cur_size;
 480 #endif
 481     return ptr;
 482 }
 483
 484 void *tcc_mallocz(unsigned long size)
 485 {
 486     void *ptr;
 487     ptr = tcc_malloc(size);
 488     memset(ptr, 0, size);
 489     return ptr;
 490 }
 491
 492 void *tcc_realloc(void *ptr, unsigned long size)
 493 {
 494     void *ptr1;
 495 #ifdef MEM_DEBUG
 496     mem_cur_size -= malloc_usable_size(ptr);
 497 #endif
 498     ptr1 = realloc(ptr, size);
 499 #ifdef MEM_DEBUG
 500     /* NOTE: count not correct if alloc error, but not critical */
 501     mem_cur_size += malloc_usable_size(ptr1);
 502     if (mem_cur_size > mem_max_size)
 503         mem_max_size = mem_cur_size;
 504 #endif
 505     return ptr1;
 506 }
 507
 508 char *tcc_strdup(const char *str)
 509 {
 510     char *ptr;
 511     ptr = tcc_malloc(strlen(str) + 1);
 512     strcpy(ptr, str);
 513     return ptr;
 514 }
 515
 516 void tcc_memstats(void)
 517 {
 518 #ifdef MEM_DEBUG
 519     printf("memory in use: %d\n", mem_cur_size);
 520 #endif
 521 }
 522
 523 #define free(p) use_tcc_free(p)
 524 #define malloc(s) use_tcc_malloc(s)
 525 #define realloc(p, s) use_tcc_realloc(p, s)
 526
 527 void dynarray_add(void ***ptab, int *nb_ptr, void *data)
 528 {
 529     int nb, nb_alloc;
 530     void **pp;
 531
 532     nb = *nb_ptr;
 533     pp = *ptab;
 534     /* every power of two we double array size */
 535     if ((nb & (nb - 1)) == 0) {
 536         if (!nb)
 537             nb_alloc = 1;
 538         else
 539             nb_alloc = nb * 2;
 540         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 541         if (!pp)
 542             error("memory full");
 543         *ptab = pp;
 544     }
 545     pp[nb++] = data;
 546     *nb_ptr = nb;
 547 }
 548
 549 void dynarray_reset(void *pp, int *n)
 550 {
 551     void **p;
 552     for (p = *(void***)pp; *n; ++p, --*n)
 553         if (*p)
 554             tcc_free(*p);
 555     tcc_free(*(void**)pp);
 556     *(void**)pp = NULL;
 557 }
 558
 559 /* symbol allocator */
 560 static Sym *__sym_malloc(void)
 561 {
 562     Sym *sym_pool, *sym, *last_sym;
 563     int i;
 564
 565     sym_pool = tcc_malloc(SYM_POOL_NB * sizeof(Sym));
 566     dynarray_add(&sym_pools, &nb_sym_pools, sym_pool);
 567
 568     last_sym = sym_free_first;
 569     sym = sym_pool;
 570     for(i = 0; i < SYM_POOL_NB; i++) {
 571         sym->next = last_sym;
 572         last_sym = sym;
 573         sym++;
 574     }
 575     sym_free_first = last_sym;
 576     return last_sym;
 577 }
 578
 579 static inline Sym *sym_malloc(void)
 580 {
 581     Sym *sym;
 582     sym = sym_free_first;
 583     if (!sym)
 584         sym = __sym_malloc();
 585     sym_free_first = sym->next;
 586     return sym;
 587 }
 588
 589 static inline void sym_free(Sym *sym)
 590 {
 591     sym->next = sym_free_first;
 592     sym_free_first = sym;
 593 }
 594
 595 Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags)
 596 {
 597     Section *sec;
 598
 599     sec = tcc_mallocz(sizeof(Section) + strlen(name));
 600     strcpy(sec->name, name);
 601     sec->sh_type = sh_type;
 602     sec->sh_flags = sh_flags;
 603     switch(sh_type) {
 604     case SHT_HASH:
 605     case SHT_REL:
 606     case SHT_RELA:
 607     case SHT_DYNSYM:
 608     case SHT_SYMTAB:
 609     case SHT_DYNAMIC:
 610         sec->sh_addralign = 4;
 611         break;
 612     case SHT_STRTAB:
 613         sec->sh_addralign = 1;
 614         break;
 615     default:
 616         sec->sh_addralign = 32; /* default conservative alignment */
 617         break;
 618     }
 619
 620     if (sh_flags & SHF_PRIVATE) {
 621         dynarray_add((void ***)&s1->priv_sections, &s1->nb_priv_sections, sec);
 622     } else {
 623         sec->sh_num = s1->nb_sections;
 624         dynarray_add((void ***)&s1->sections, &s1->nb_sections, sec);
 625     }
 626
 627     return sec;
 628 }
 629
 630 static void free_section(Section *s)
 631 {
 632     tcc_free(s->data);
 633 }
 634
 635 /* realloc section and set its content to zero */
 636 static void section_realloc(Section *sec, unsigned long new_size)
 637 {
 638     unsigned long size;
 639     unsigned char *data;
 640
 641     size = sec->data_allocated;
 642     if (size == 0)
 643         size = 1;
 644     while (size < new_size)
 645         size = size * 2;
 646     data = tcc_realloc(sec->data, size);
 647     if (!data)
 648         error("memory full");
 649     memset(data + sec->data_allocated, 0, size - sec->data_allocated);
 650     sec->data = data;
 651     sec->data_allocated = size;
 652 }
 653
 654 /* reserve at least 'size' bytes in section 'sec' from
 655    sec->data_offset. */
 656 static void *section_ptr_add(Section *sec, unsigned long size)
 657 {
 658     unsigned long offset, offset1;
 659
 660     offset = sec->data_offset;
 661     offset1 = offset + size;
 662     if (offset1 > sec->data_allocated)
 663         section_realloc(sec, offset1);
 664     sec->data_offset = offset1;
 665     return sec->data + offset;
 666 }
 667
 668 /* return a reference to a section, and create it if it does not
 669    exists */
 670 Section *find_section(TCCState *s1, const char *name)
 671 {
 672     Section *sec;
 673     int i;
 674     for(i = 1; i < s1->nb_sections; i++) {
 675         sec = s1->sections[i];
 676         if (!strcmp(name, sec->name))
 677             return sec;
 678     }
 679     /* sections are created as PROGBITS */
 680     return new_section(s1, name, SHT_PROGBITS, SHF_ALLOC);
 681 }
 682
 683 /* update sym->c so that it points to an external symbol in section
 684    'section' with value 'value' */
 685 static void put_extern_sym2(Sym *sym, Section *section,
 686                             unsigned long value, unsigned long size,
 687                             int can_add_underscore)
 688 {
 689     int sym_type, sym_bind, sh_num, info, other, attr;
 690     ElfW(Sym) *esym;
 691     const char *name;
 692     char buf1[256];
 693
 694     if (section == NULL)
 695         sh_num = SHN_UNDEF;
 696     else if (section == SECTION_ABS)
 697         sh_num = SHN_ABS;
 698     else
 699         sh_num = section->sh_num;
 700
 701     other = attr = 0;
 702
 703     if ((sym->type.t & VT_BTYPE) == VT_FUNC) {
 704         sym_type = STT_FUNC;
 705 #ifdef TCC_TARGET_PE
 706         if (sym->type.ref)
 707             attr = sym->type.ref->r;
 708         if (FUNC_EXPORT(attr))
 709             other |= 1;
 710         if (FUNC_CALL(attr) == FUNC_STDCALL)
 711             other |= 2;
 712 #endif
 713     } else if ((sym->type.t & VT_BTYPE) == VT_VOID) {
 714         sym_type = STT_NOTYPE;
 715     } else {
 716         sym_type = STT_OBJECT;
 717 #ifdef TCC_TARGET_PE
 718         if (sym->type.t & VT_EXPORT)
 719             other |= 1;
 720 #endif
 721     }
 722
 723     if (sym->type.t & VT_STATIC)
 724         sym_bind = STB_LOCAL;
 725     else
 726         sym_bind = STB_GLOBAL;
 727
 728     if (!sym->c) {
 729         name = get_tok_str(sym->v, NULL);
 730 #ifdef CONFIG_TCC_BCHECK
 731         if (tcc_state->do_bounds_check) {
 732             char buf[32];
 733
 734             /* XXX: avoid doing that for statics ? */
 735             /* if bound checking is activated, we change some function
 736                names by adding the "__bound" prefix */
 737             switch(sym->v) {
 738 #ifdef TCC_TARGET_PE
 739             /* XXX: we rely only on malloc hooks */
 740             case TOK_malloc:
 741             case TOK_free:
 742             case TOK_realloc:
 743             case TOK_memalign:
 744             case TOK_calloc:
 745 #endif
 746             case TOK_memcpy:
 747             case TOK_memmove:
 748             case TOK_memset:
 749             case TOK_strlen:
 750             case TOK_strcpy:
 751             case TOK_alloca:
 752                 strcpy(buf, "__bound_");
 753                 strcat(buf, name);
 754                 name = buf;
 755                 break;
 756             }
 757         }
 758 #endif
 759
 760 #ifdef TCC_TARGET_PE
 761         if ((other & 2) && can_add_underscore) {
 762             sprintf(buf1, "_%s@%d", name, FUNC_ARGS(attr));
 763             name = buf1;
 764         } else
 765 #endif
 766         if (tcc_state->leading_underscore && can_add_underscore) {
 767             buf1[0] = '_';
 768             pstrcpy(buf1 + 1, sizeof(buf1) - 1, name);
 769             name = buf1;
 770         }
 771         info = ELFW(ST_INFO)(sym_bind, sym_type);
 772         sym->c = add_elf_sym(symtab_section, value, size, info, other, sh_num, name);
 773     } else {
 774         esym = &((ElfW(Sym) *)symtab_section->data)[sym->c];
 775         esym->st_value = value;
 776         esym->st_size = size;
 777         esym->st_shndx = sh_num;
 778         esym->st_other |= other;
 779     }
 780 }
 781
 782 static void put_extern_sym(Sym *sym, Section *section,
 783                            unsigned long value, unsigned long size)
 784 {
 785     put_extern_sym2(sym, section, value, size, 1);
 786 }
 787
 788 /* add a new relocation entry to symbol 'sym' in section 's' */
 789 static void greloc(Section *s, Sym *sym, unsigned long offset, int type)
 790 {
 791     int c = 0;
 792     if (sym) {
 793         if (0 == sym->c)
 794             put_extern_sym(sym, NULL, 0, 0);
 795         c = sym->c;
 796     }
 797     /* now we can add ELF relocation info */
 798     put_elf_reloc(symtab_section, s, offset, type, c);
 799 }
 800
 801 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 802 {
 803     int len;
 804     len = strlen(buf);
 805     vsnprintf(buf + len, buf_size - len, fmt, ap);
 806 }
 807
 808 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 809 {
 810     va_list ap;
 811     va_start(ap, fmt);
 812     strcat_vprintf(buf, buf_size, fmt, ap);
 813     va_end(ap);
 814 }
 815
 816 void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 817 {
 818     char buf[2048];
 819     BufferedFile **f;
 820
 821     buf[0] = '\0';
 822     if (file) {
 823         for(f = s1->include_stack; f < s1->include_stack_ptr; f++)
 824             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 825                           (*f)->filename, (*f)->line_num);
 826         if (file->line_num > 0) {
 827             strcat_printf(buf, sizeof(buf),
 828                           "%s:%d: ", file->filename, file->line_num);
 829         } else {
 830             strcat_printf(buf, sizeof(buf),
 831                           "%s: ", file->filename);
 832         }
 833     } else {
 834         strcat_printf(buf, sizeof(buf),
 835                       "tcc: ");
 836     }
 837     if (is_warning)
 838         strcat_printf(buf, sizeof(buf), "warning: ");
 839     else
 840         strcat_printf(buf, sizeof(buf), "error: ");
 841     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 842
 843     if (!s1->error_func) {
 844         /* default case: stderr */
 845         fprintf(stderr, "%s\n", buf);
 846     } else {
 847         s1->error_func(s1->error_opaque, buf);
 848     }
 849     if (!is_warning || s1->warn_error)
 850         s1->nb_errors++;
 851 }
 852
 853 void tcc_set_error_func(TCCState *s, void *error_opaque,
 854                         void (*error_func)(void *opaque, const char *msg))
 855 {
 856     s->error_opaque = error_opaque;
 857     s->error_func = error_func;
 858 }
 859
 860 /* error without aborting current compilation */
 861 void error_noabort(const char *fmt, ...)
 862 {
 863     TCCState *s1 = tcc_state;
 864     va_list ap;
 865
 866     va_start(ap, fmt);
 867     error1(s1, 0, fmt, ap);
 868     va_end(ap);
 869 }
 870
 871 void error(const char *fmt, ...)
 872 {
 873     TCCState *s1 = tcc_state;
 874     va_list ap;
 875
 876     va_start(ap, fmt);
 877     error1(s1, 0, fmt, ap);
 878     va_end(ap);
 879     /* better than nothing: in some cases, we accept to handle errors */
 880     if (s1->error_set_jmp_enabled) {
 881         longjmp(s1->error_jmp_buf, 1);
 882     } else {
 883         /* XXX: eliminate this someday */
 884         exit(1);
 885     }
 886 }
 887
 888 void expect(const char *msg)
 889 {
 890     error("%s expected", msg);
 891 }
 892
 893 void warning(const char *fmt, ...)
 894 {
 895     TCCState *s1 = tcc_state;
 896     va_list ap;
 897
 898     if (s1->warn_none)
 899         return;
 900
 901     va_start(ap, fmt);
 902     error1(s1, 1, fmt, ap);
 903     va_end(ap);
 904 }
 905
 906 void skip(int c)
 907 {
 908     if (tok != c)
 909         error("'%c' expected", c);
 910     next();
 911 }
 912
 913 static void test_lvalue(void)
 914 {
 915     if (!(vtop->r & VT_LVAL))
 916         expect("lvalue");
 917 }
 918
 919 /* CString handling */
 920
 921 static void cstr_realloc(CString *cstr, int new_size)
 922 {
 923     int size;
 924     void *data;
 925
 926     size = cstr->size_allocated;
 927     if (size == 0)
 928         size = 8; /* no need to allocate a too small first string */
 929     while (size < new_size)
 930         size = size * 2;
 931     data = tcc_realloc(cstr->data_allocated, size);
 932     if (!data)
 933         error("memory full");
 934     cstr->data_allocated = data;
 935     cstr->size_allocated = size;
 936     cstr->data = data;
 937 }
 938
 939 /* add a byte */
 940 static inline void cstr_ccat(CString *cstr, int ch)
 941 {
 942     int size;
 943     size = cstr->size + 1;
 944     if (size > cstr->size_allocated)
 945         cstr_realloc(cstr, size);
 946     ((unsigned char *)cstr->data)[size - 1] = ch;
 947     cstr->size = size;
 948 }
 949
 950 static void cstr_cat(CString *cstr, const char *str)
 951 {
 952     int c;
 953     for(;;) {
 954         c = *str;
 955         if (c == '\0')
 956             break;
 957         cstr_ccat(cstr, c);
 958         str++;
 959     }
 960 }
 961
 962 /* add a wide char */
 963 static void cstr_wccat(CString *cstr, int ch)
 964 {
 965     int size;
 966     size = cstr->size + sizeof(nwchar_t);
 967     if (size > cstr->size_allocated)
 968         cstr_realloc(cstr, size);
 969     *(nwchar_t *)(((unsigned char *)cstr->data) + size - sizeof(nwchar_t)) = ch;
 970     cstr->size = size;
 971 }
 972
 973 static void cstr_new(CString *cstr)
 974 {
 975     memset(cstr, 0, sizeof(CString));
 976 }
 977
 978 /* free string and reset it to NULL */
 979 static void cstr_free(CString *cstr)
 980 {
 981     tcc_free(cstr->data_allocated);
 982     cstr_new(cstr);
 983 }
 984
 985 #define cstr_reset(cstr) cstr_free(cstr)
 986
 987 /* XXX: unicode ? */
 988 static void add_char(CString *cstr, int c)
 989 {
 990     if (c == '\'' || c == '\"' || c == '\\') {
 991         /* XXX: could be more precise if char or string */
 992         cstr_ccat(cstr, '\\');
 993     }
 994     if (c >= 32 && c <= 126) {
 995         cstr_ccat(cstr, c);
 996     } else {
 997         cstr_ccat(cstr, '\\');
 998         if (c == '\n') {
 999             cstr_ccat(cstr, 'n');
1000         } else {
1001             cstr_ccat(cstr, '0' + ((c >> 6) & 7));
1002             cstr_ccat(cstr, '0' + ((c >> 3) & 7));
1003             cstr_ccat(cstr, '0' + (c & 7));
1004         }
1005     }
1006 }
1007
1008 /* push, without hashing */
1009 static Sym *sym_push2(Sym **ps, int v, int t, long c)
1010 {
1011     Sym *s;
1012     s = sym_malloc();
1013     s->v = v;
1014     s->type.t = t;
1015     s->type.ref = NULL;
1016 #ifdef _WIN64
1017     s->d = NULL;
1018 #endif
1019     s->c = c;
1020     s->next = NULL;
1021     /* add in stack */
1022     s->prev = *ps;
1023     *ps = s;
1024     return s;
1025 }
1026
1027 /* find a symbol and return its associated structure. 's' is the top
1028    of the symbol stack */
1029 static Sym *sym_find2(Sym *s, int v)
1030 {
1031     while (s) {
1032         if (s->v == v)
1033             return s;
1034         s = s->prev;
1035     }
1036     return NULL;
1037 }
1038
1039 /* structure lookup */
1040 static inline Sym *struct_find(int v)
1041 {
1042     v -= TOK_IDENT;
1043     if ((unsigned)v >= (unsigned)(tok_ident - TOK_IDENT))
1044         return NULL;
1045     return table_ident[v]->sym_struct;
1046 }
1047
1048 /* find an identifier */
1049 static inline Sym *sym_find(int v)
1050 {
1051     v -= TOK_IDENT;
1052     if ((unsigned)v >= (unsigned)(tok_ident - TOK_IDENT))
1053         return NULL;
1054     return table_ident[v]->sym_identifier;
1055 }
1056
1057 /* push a given symbol on the symbol stack */
1058 static Sym *sym_push(int v, CType *type, int r, int c)
1059 {
1060     Sym *s, **ps;
1061     TokenSym *ts;
1062
1063     if (local_stack)
1064         ps = &local_stack;
1065     else
1066         ps = &global_stack;
1067     s = sym_push2(ps, v, type->t, c);
1068     s->type.ref = type->ref;
1069     s->r = r;
1070     /* don't record fields or anonymous symbols */
1071     /* XXX: simplify */
1072     if (!(v & SYM_FIELD) && (v & ~SYM_STRUCT) < SYM_FIRST_ANOM) {
1073         /* record symbol in token array */
1074         ts = table_ident[(v & ~SYM_STRUCT) - TOK_IDENT];
1075         if (v & SYM_STRUCT)
1076             ps = &ts->sym_struct;
1077         else
1078             ps = &ts->sym_identifier;
1079         s->prev_tok = *ps;
1080         *ps = s;
1081     }
1082     return s;
1083 }
1084
1085 /* push a global identifier */
1086 static Sym *global_identifier_push(int v, int t, int c)
1087 {
1088     Sym *s, **ps;
1089     s = sym_push2(&global_stack, v, t, c);
1090     /* don't record anonymous symbol */
1091     if (v < SYM_FIRST_ANOM) {
1092         ps = &table_ident[v - TOK_IDENT]->sym_identifier;
1093         /* modify the top most local identifier, so that
1094            sym_identifier will point to 's' when popped */
1095         while (*ps != NULL)
1096             ps = &(*ps)->prev_tok;
1097         s->prev_tok = NULL;
1098         *ps = s;
1099     }
1100     return s;
1101 }
1102
1103 /* pop symbols until top reaches 'b' */
1104 static void sym_pop(Sym **ptop, Sym *b)
1105 {
1106     Sym *s, *ss, **ps;
1107     TokenSym *ts;
1108     int v;
1109
1110     s = *ptop;
1111     while(s != b) {
1112         ss = s->prev;
1113         v = s->v;
1114         /* remove symbol in token array */
1115         /* XXX: simplify */
1116         if (!(v & SYM_FIELD) && (v & ~SYM_STRUCT) < SYM_FIRST_ANOM) {
1117             ts = table_ident[(v & ~SYM_STRUCT) - TOK_IDENT];
1118             if (v & SYM_STRUCT)
1119                 ps = &ts->sym_struct;
1120             else
1121                 ps = &ts->sym_identifier;
1122             *ps = s->prev_tok;
1123         }
1124         sym_free(s);
1125         s = ss;
1126     }
1127     *ptop = b;
1128 }
1129
1130 /* I/O layer */
1131
1132 BufferedFile *tcc_open(TCCState *s1, const char *filename)
1133 {
1134     int fd;
1135     BufferedFile *bf;
1136
1137     if (strcmp(filename, "-") == 0)
1138         fd = 0, filename = "stdin";
1139     else
1140         fd = open(filename, O_RDONLY | O_BINARY);
1141     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
1142         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
1143                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
1144     if (fd < 0)
1145         return NULL;
1146     bf = tcc_malloc(sizeof(BufferedFile));
1147     bf->fd = fd;
1148     bf->buf_ptr = bf->buffer;
1149     bf->buf_end = bf->buffer;
1150     bf->buffer[0] = CH_EOB; /* put eob symbol */
1151     pstrcpy(bf->filename, sizeof(bf->filename), filename);
1152 #ifdef _WIN32
1153     normalize_slashes(bf->filename);
1154 #endif
1155     bf->line_num = 1;
1156     bf->ifndef_macro = 0;
1157     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
1158     //    printf("opening '%s'\n", filename);
1159     return bf;
1160 }
1161
1162 void tcc_close(BufferedFile *bf)
1163 {
1164     total_lines += bf->line_num;
1165     close(bf->fd);
1166     tcc_free(bf);
1167 }
1168
1169 /* compile the C file opened in 'file'. Return non zero if errors. */
1170 static int tcc_compile(TCCState *s1)
1171 {
1172     Sym *define_start;
1173     char buf[512];
1174     volatile int section_sym;
1175
1176 #ifdef INC_DEBUG
1177     printf("%s: **** new file\n", file->filename);
1178 #endif
1179     preprocess_init(s1);
1180
1181     cur_text_section = NULL;
1182     funcname = "";
1183     anon_sym = SYM_FIRST_ANOM;
1184
1185     /* file info: full path + filename */
1186     section_sym = 0; /* avoid warning */
1187     if (s1->do_debug) {
1188         section_sym = put_elf_sym(symtab_section, 0, 0,
1189                                   ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
1190                                   text_section->sh_num, NULL);
1191         getcwd(buf, sizeof(buf));
1192 #ifdef _WIN32
1193         normalize_slashes(buf);
1194 #endif
1195         pstrcat(buf, sizeof(buf), "/");
1196         put_stabs_r(buf, N_SO, 0, 0,
1197                     text_section->data_offset, text_section, section_sym);
1198         put_stabs_r(file->filename, N_SO, 0, 0,
1199                     text_section->data_offset, text_section, section_sym);
1200     }
1201     /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
1202        symbols can be safely used */
1203     put_elf_sym(symtab_section, 0, 0,
1204                 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
1205                 SHN_ABS, file->filename);
1206
1207     /* define some often used types */
1208     int_type.t = VT_INT;
1209
1210     char_pointer_type.t = VT_BYTE;
1211     mk_pointer(&char_pointer_type);
1212
1213     func_old_type.t = VT_FUNC;
1214     func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
1215
1216 #if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP)
1217     float_type.t = VT_FLOAT;
1218     double_type.t = VT_DOUBLE;
1219
1220     func_float_type.t = VT_FUNC;
1221     func_float_type.ref = sym_push(SYM_FIELD, &float_type, FUNC_CDECL, FUNC_OLD);
1222     func_double_type.t = VT_FUNC;
1223     func_double_type.ref = sym_push(SYM_FIELD, &double_type, FUNC_CDECL, FUNC_OLD);
1224 #endif
1225
1226 #if 0
1227     /* define 'void *alloca(unsigned int)' builtin function */
1228     {
1229         Sym *s1;
1230
1231         p = anon_sym++;
1232         sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
1233         s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
1234         s1->next = NULL;
1235         sym->next = s1;
1236         sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
1237     }
1238 #endif
1239
1240     define_start = define_stack;
1241     nocode_wanted = 1;
1242
1243     if (setjmp(s1->error_jmp_buf) == 0) {
1244         s1->nb_errors = 0;
1245         s1->error_set_jmp_enabled = 1;
1246
1247         ch = file->buf_ptr[0];
1248         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
1249         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
1250         next();
1251         decl(VT_CONST);
1252         if (tok != TOK_EOF)
1253             expect("declaration");
1254
1255         /* end of translation unit info */
1256         if (s1->do_debug) {
1257             put_stabs_r(NULL, N_SO, 0, 0,
1258                         text_section->data_offset, text_section, section_sym);
1259         }
1260     }
1261     s1->error_set_jmp_enabled = 0;
1262
1263     /* reset define stack, but leave -Dsymbols (may be incorrect if
1264        they are undefined) */
1265     free_defines(define_start);
1266
1267     gen_inline_functions();
1268
1269     sym_pop(&global_stack, NULL);
1270     sym_pop(&local_stack, NULL);
1271
1272     return s1->nb_errors != 0 ? -1 : 0;
1273 }
1274
1275 int tcc_compile_string(TCCState *s, const char *str)
1276 {
1277     BufferedFile bf1, *bf = &bf1;
1278     int ret, len;
1279     char *buf;
1280
1281     /* init file structure */
1282     bf->fd = -1;
1283     /* XXX: avoid copying */
1284     len = strlen(str);
1285     buf = tcc_malloc(len + 1);
1286     if (!buf)
1287         return -1;
1288     memcpy(buf, str, len);
1289     buf[len] = CH_EOB;
1290     bf->buf_ptr = buf;
1291     bf->buf_end = buf + len;
1292     pstrcpy(bf->filename, sizeof(bf->filename), "<string>");
1293     bf->line_num = 1;
1294     file = bf;
1295     ret = tcc_compile(s);
1296     file = NULL;
1297     tcc_free(buf);
1298
1299     /* currently, no need to close */
1300     return ret;
1301 }
1302
1303 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
1304 void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
1305 {
1306     BufferedFile bf1, *bf = &bf1;
1307
1308     pstrcpy(bf->buffer, IO_BUF_SIZE, sym);
1309     pstrcat(bf->buffer, IO_BUF_SIZE, " ");
1310     /* default value */
1311     if (!value)
1312         value = "1";
1313     pstrcat(bf->buffer, IO_BUF_SIZE, value);
1314
1315     /* init file structure */
1316     bf->fd = -1;
1317     bf->buf_ptr = bf->buffer;
1318     bf->buf_end = bf->buffer + strlen(bf->buffer);
1319     *bf->buf_end = CH_EOB;
1320     bf->filename[0] = '\0';
1321     bf->line_num = 1;
1322     file = bf;
1323
1324     s1->include_stack_ptr = s1->include_stack;
1325
1326     /* parse with define parser */
1327     ch = file->buf_ptr[0];
1328     next_nomacro();
1329     parse_define();
1330     file = NULL;
1331 }
1332
1333 /* undefine a preprocessor symbol */
1334 void tcc_undefine_symbol(TCCState *s1, const char *sym)
1335 {
1336     TokenSym *ts;
1337     Sym *s;
1338     ts = tok_alloc(sym, strlen(sym));
1339     s = define_find(ts->tok);
1340     /* undefine symbol by putting an invalid name */
1341     if (s)
1342         define_undef(s);
1343 }
1344
1345 static void tcc_cleanup(void)
1346 {
1347     int i, n;
1348
1349     if (NULL == tcc_state)
1350         return;
1351     tcc_state = NULL;
1352
1353     /* free -D defines */
1354     free_defines(NULL);
1355
1356     /* free tokens */
1357     n = tok_ident - TOK_IDENT;
1358     for(i = 0; i < n; i++)
1359         tcc_free(table_ident[i]);
1360     tcc_free(table_ident);
1361
1362     /* free sym_pools */
1363     dynarray_reset(&sym_pools, &nb_sym_pools);
1364     /* string buffer */
1365     cstr_free(&tokcstr);
1366     /* reset symbol stack */
1367     sym_free_first = NULL;
1368     /* cleanup from error/setjmp */
1369     macro_ptr = NULL;
1370 }
1371
1372 TCCState *tcc_new(void)
1373 {
1374     TCCState *s;
1375     char buffer[100];
1376     int a,b,c;
1377
1378     tcc_cleanup();
1379
1380     s = tcc_mallocz(sizeof(TCCState));
1381     if (!s)
1382         return NULL;
1383     tcc_state = s;
1384 #ifdef _WIN32
1385     tcc_set_lib_path_w32(s);
1386 #else
1387     tcc_set_lib_path(s, CONFIG_TCCDIR);
1388 #endif
1389     s->output_type = TCC_OUTPUT_MEMORY;
1390     preprocess_new();
1391
1392     /* we add dummy defines for some special macros to speed up tests
1393        and to have working defined() */
1394     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
1395     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
1396     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
1397     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
1398
1399     /* standard defines */
1400     tcc_define_symbol(s, "__STDC__", NULL);
1401     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
1402 #if defined(TCC_TARGET_I386)
1403     tcc_define_symbol(s, "__i386__", "1");
1404     tcc_define_symbol(s, "__i386", "1");
1405     tcc_define_symbol(s, "i386", "1");
1406 #endif
1407 #if defined(TCC_TARGET_X86_64)
1408     tcc_define_symbol(s, "__x86_64__", NULL);
1409 #endif
1410 #if defined(TCC_TARGET_ARM)
1411     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
1412     tcc_define_symbol(s, "__arm_elf__", NULL);
1413     tcc_define_symbol(s, "__arm_elf", NULL);
1414     tcc_define_symbol(s, "arm_elf", NULL);
1415     tcc_define_symbol(s, "__arm__", NULL);
1416     tcc_define_symbol(s, "__arm", NULL);
1417     tcc_define_symbol(s, "arm", NULL);
1418     tcc_define_symbol(s, "__APCS_32__", NULL);
1419 #endif
1420 #ifdef TCC_TARGET_PE
1421     tcc_define_symbol(s, "_WIN32", NULL);
1422 #ifdef TCC_TARGET_X86_64
1423     tcc_define_symbol(s, "_WIN64", NULL);
1424 #endif
1425 #else
1426     tcc_define_symbol(s, "__unix__", "1");
1427     tcc_define_symbol(s, "__unix", "1");
1428     tcc_define_symbol(s, "unix", "1");
1429 #if defined(__FreeBSD__)
1430 #define str(s) #s
1431     tcc_define_symbol(s, "__FreeBSD__", str( __FreeBSD__));
1432     tcc_define_symbol(s, "__INTEL_COMPILER", "1");
1433 #undef str
1434 #endif
1435 #if defined(__linux)
1436     tcc_define_symbol(s, "__linux__", NULL);
1437     tcc_define_symbol(s, "__linux", NULL);
1438 #endif
1439 #endif
1440     /* tiny C specific defines */
1441     sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
1442     sprintf(buffer, "%d", a*10000 + b*100 + c);
1443     tcc_define_symbol(s, "__TINYC__", buffer);
1444
1445     /* tiny C & gcc defines */
1446     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
1447     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
1448 #ifdef TCC_TARGET_PE
1449     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
1450 #else
1451     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
1452 #endif
1453
1454 #ifndef TCC_TARGET_PE
1455     /* default library paths */
1456     tcc_add_library_path(s, CONFIG_SYSROOT "/usr/local/lib");
1457     tcc_add_library_path(s, CONFIG_SYSROOT "/usr/lib");
1458     tcc_add_library_path(s, CONFIG_SYSROOT "/lib");
1459 #endif
1460
1461     /* no section zero */
1462     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
1463
1464     /* create standard sections */
1465     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
1466     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
1467     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
1468
1469     /* symbols are always generated for linking stage */
1470     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
1471                                 ".strtab",
1472                                 ".hashtab", SHF_PRIVATE);
1473     strtab_section = symtab_section->link;
1474
1475     /* private symbol table for dynamic symbols */
1476     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
1477                                       ".dynstrtab",
1478                                       ".dynhashtab", SHF_PRIVATE);
1479     s->alacarte_link = 1;
1480
1481 #ifdef CHAR_IS_UNSIGNED
1482     s->char_is_unsigned = 1;
1483 #endif
1484 #if defined(TCC_TARGET_PE) && 0
1485     /* XXX: currently the PE linker is not ready to support that */
1486     s->leading_underscore = 1;
1487 #endif
1488
1489     if (s->section_align == 0)
1490         s->section_align = ELF_PAGE_SIZE;
1491
1492 #ifdef TCC_TARGET_I386
1493     s->seg_size = 32;
1494 #endif
1495     return s;
1496 }
1497
1498 void tcc_delete(TCCState *s1)
1499 {
1500     int i;
1501
1502     tcc_cleanup();
1503
1504     /* free all sections */
1505     for(i = 1; i < s1->nb_sections; i++)
1506         free_section(s1->sections[i]);
1507     dynarray_reset(&s1->sections, &s1->nb_sections);
1508
1509     for(i = 0; i < s1->nb_priv_sections; i++)
1510         free_section(s1->priv_sections[i]);
1511     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1512
1513     /* free any loaded DLLs */
1514     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1515         DLLReference *ref = s1->loaded_dlls[i];
1516         if ( ref->handle )
1517             dlclose(ref->handle);
1518     }
1519
1520     /* free loaded dlls array */
1521     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1522
1523     /* free library paths */
1524     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1525
1526     /* free include paths */
1527     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1528     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1529     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1530
1531     tcc_free(s1->tcc_lib_path);
1532     tcc_free(s1->runtime_mem);
1533     tcc_free(s1);
1534 }
1535
1536 int tcc_add_include_path(TCCState *s1, const char *pathname)
1537 {
1538     char *pathname1;
1539
1540     pathname1 = tcc_strdup(pathname);
1541     dynarray_add((void ***)&s1->include_paths, &s1->nb_include_paths, pathname1);
1542     return 0;
1543 }
1544
1545 int tcc_add_sysinclude_path(TCCState *s1, const char *pathname)
1546 {
1547     char *pathname1;
1548
1549     pathname1 = tcc_strdup(pathname);
1550     dynarray_add((void ***)&s1->sysinclude_paths, &s1->nb_sysinclude_paths, pathname1);
1551     return 0;
1552 }
1553
1554 static int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1555 {
1556     const char *ext;
1557     ElfW(Ehdr) ehdr;
1558     int fd, ret, size;
1559     BufferedFile *saved_file;
1560
1561     ret = -1;
1562
1563     /* find source file type with extension */
1564     ext = tcc_fileextension(filename);
1565     if (ext[0])
1566         ext++;
1567
1568     /* open the file */
1569     saved_file = file;
1570     file = tcc_open(s1, filename);
1571     if (!file) {
1572         if (flags & AFF_PRINT_ERROR)
1573             error_noabort("file '%s' not found", filename);
1574         goto the_end;
1575     }
1576
1577     if (flags & AFF_PREPROCESS) {
1578         ret = tcc_preprocess(s1);
1579         goto the_end;
1580     }
1581
1582     if (!ext[0] || !PATHCMP(ext, "c")) {
1583         /* C file assumed */
1584         ret = tcc_compile(s1);
1585         goto the_end;
1586     }
1587
1588 #ifdef CONFIG_TCC_ASM
1589     if (!strcmp(ext, "S")) {
1590         /* preprocessed assembler */
1591         ret = tcc_assemble(s1, 1);
1592         goto the_end;
1593     }
1594
1595     if (!strcmp(ext, "s")) {
1596         /* non preprocessed assembler */
1597         ret = tcc_assemble(s1, 0);
1598         goto the_end;
1599     }
1600 #endif
1601
1602     fd = file->fd;
1603     /* assume executable format: auto guess file type */
1604     size = read(fd, &ehdr, sizeof(ehdr));
1605     lseek(fd, 0, SEEK_SET);
1606     if (size <= 0) {
1607         error_noabort("could not read header");
1608         goto the_end;
1609     }
1610
1611     if (size == sizeof(ehdr) &&
1612         ehdr.e_ident[0] == ELFMAG0 &&
1613         ehdr.e_ident[1] == ELFMAG1 &&
1614         ehdr.e_ident[2] == ELFMAG2 &&
1615         ehdr.e_ident[3] == ELFMAG3) {
1616
1617         /* do not display line number if error */
1618         file->line_num = 0;
1619         if (ehdr.e_type == ET_REL) {
1620             ret = tcc_load_object_file(s1, fd, 0);
1621             goto the_end;
1622
1623         }
1624 #ifndef TCC_TARGET_PE
1625         if (ehdr.e_type == ET_DYN) {
1626             if (s1->output_type == TCC_OUTPUT_MEMORY) {
1627                 void *h;
1628                 h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1629                 if (h)
1630                     ret = 0;
1631             } else {
1632                 ret = tcc_load_dll(s1, fd, filename,
1633                                    (flags & AFF_REFERENCED_DLL) != 0);
1634             }
1635             goto the_end;
1636         }
1637 #endif
1638         error_noabort("unrecognized ELF file");
1639         goto the_end;
1640     }
1641
1642     if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
1643         file->line_num = 0; /* do not display line number if error */
1644         ret = tcc_load_archive(s1, fd);
1645         goto the_end;
1646     }
1647
1648 #ifdef TCC_TARGET_COFF
1649     if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
1650         ret = tcc_load_coff(s1, fd);
1651         goto the_end;
1652     }
1653 #endif
1654
1655 #ifdef TCC_TARGET_PE
1656     ret = pe_load_file(s1, filename, fd);
1657 #else
1658     /* as GNU ld, consider it is an ld script if not recognized */
1659     ret = tcc_load_ldscript(s1);
1660 #endif
1661     if (ret < 0)
1662         error_noabort("unrecognized file type");
1663
1664 the_end:
1665     if (file)
1666         tcc_close(file);
1667     file = saved_file;
1668     return ret;
1669 }
1670
1671 int tcc_add_file(TCCState *s, const char *filename)
1672 {
1673     if (s->output_type == TCC_OUTPUT_PREPROCESS)
1674         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS);
1675     else
1676         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR);
1677 }
1678
1679 int tcc_add_library_path(TCCState *s, const char *pathname)
1680 {
1681     char *pathname1;
1682
1683     pathname1 = tcc_strdup(pathname);
1684     dynarray_add((void ***)&s->library_paths, &s->nb_library_paths, pathname1);
1685     return 0;
1686 }
1687
1688 /* find and load a dll. Return non zero if not found */
1689 /* XXX: add '-rpath' option support ? */
1690 static int tcc_add_dll(TCCState *s, const char *filename, int flags)
1691 {
1692     char buf[1024];
1693     int i;
1694
1695     for(i = 0; i < s->nb_library_paths; i++) {
1696         snprintf(buf, sizeof(buf), "%s/%s",
1697                  s->library_paths[i], filename);
1698         if (tcc_add_file_internal(s, buf, flags) == 0)
1699             return 0;
1700     }
1701     return -1;
1702 }
1703
1704 /* the library name is the same as the argument of the '-l' option */
1705 int tcc_add_library(TCCState *s, const char *libraryname)
1706 {
1707     char buf[1024];
1708     int i;
1709
1710     /* first we look for the dynamic library if not static linking */
1711     if (!s->static_link) {
1712 #ifdef TCC_TARGET_PE
1713         if (pe_add_dll(s, libraryname) == 0)
1714             return 0;
1715 #else
1716         snprintf(buf, sizeof(buf), "lib%s.so", libraryname);
1717         if (tcc_add_dll(s, buf, 0) == 0)
1718             return 0;
1719 #endif
1720     }
1721     /* then we look for the static library */
1722     for(i = 0; i < s->nb_library_paths; i++) {
1723         snprintf(buf, sizeof(buf), "%s/lib%s.a",
1724                  s->library_paths[i], libraryname);
1725         if (tcc_add_file_internal(s, buf, 0) == 0)
1726             return 0;
1727     }
1728     return -1;
1729 }
1730
1731 int tcc_add_symbol(TCCState *s, const char *name, void *val)
1732 {
1733     add_elf_sym(symtab_section, (uplong)val, 0,
1734                 ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1735                 SHN_ABS, name);
1736     return 0;
1737 }
1738
1739 int tcc_set_output_type(TCCState *s, int output_type)
1740 {
1741     char buf[1024];
1742
1743     s->output_type = output_type;
1744
1745     if (!s->nostdinc) {
1746         /* default include paths */
1747         /* XXX: reverse order needed if -isystem support */
1748 #ifndef TCC_TARGET_PE
1749         tcc_add_sysinclude_path(s, CONFIG_SYSROOT "/usr/local/include");
1750         tcc_add_sysinclude_path(s, CONFIG_SYSROOT "/usr/include");
1751 #endif
1752         snprintf(buf, sizeof(buf), "%s/include", s->tcc_lib_path);
1753         tcc_add_sysinclude_path(s, buf);
1754 #ifdef TCC_TARGET_PE
1755         snprintf(buf, sizeof(buf), "%s/include/winapi", s->tcc_lib_path);
1756         tcc_add_sysinclude_path(s, buf);
1757 #endif
1758     }
1759
1760     /* if bound checking, then add corresponding sections */
1761 #ifdef CONFIG_TCC_BCHECK
1762     if (s->do_bounds_check) {
1763         /* define symbol */
1764         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1765         /* create bounds sections */
1766         bounds_section = new_section(s, ".bounds",
1767                                      SHT_PROGBITS, SHF_ALLOC);
1768         lbounds_section = new_section(s, ".lbounds",
1769                                       SHT_PROGBITS, SHF_ALLOC);
1770     }
1771 #endif
1772
1773     if (s->char_is_unsigned) {
1774         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
1775     }
1776
1777     /* add debug sections */
1778     if (s->do_debug) {
1779         /* stab symbols */
1780         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
1781         stab_section->sh_entsize = sizeof(Stab_Sym);
1782         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
1783         put_elf_str(stabstr_section, "");
1784         stab_section->link = stabstr_section;
1785         /* put first entry */
1786         put_stabs("", 0, 0, 0, 0);
1787     }
1788
1789     /* add libc crt1/crti objects */
1790 #ifndef TCC_TARGET_PE
1791     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1792         !s->nostdlib) {
1793         if (output_type != TCC_OUTPUT_DLL)
1794             tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crt1.o");
1795         tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crti.o");
1796     }
1797 #endif
1798
1799 #ifdef TCC_TARGET_PE
1800     snprintf(buf, sizeof(buf), "%s/lib", s->tcc_lib_path);
1801     tcc_add_library_path(s, buf);
1802 #ifdef _WIN32
1803     if (GetSystemDirectory(buf, sizeof buf))
1804         tcc_add_library_path(s, buf);
1805 #endif
1806 #endif
1807
1808     return 0;
1809 }
1810
1811 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
1812 #define FD_INVERT 0x0002 /* invert value before storing */
1813
1814 typedef struct FlagDef {
1815     uint16_t offset;
1816     uint16_t flags;
1817     const char *name;
1818 } FlagDef;
1819
1820 static const FlagDef warning_defs[] = {
1821     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1822     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1823     { offsetof(TCCState, warn_error), 0, "error" },
1824     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1825       "implicit-function-declaration" },
1826 };
1827
1828 static int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1829                     const char *name, int value)
1830 {
1831     int i;
1832     const FlagDef *p;
1833     const char *r;
1834
1835     r = name;
1836     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
1837         r += 3;
1838         value = !value;
1839     }
1840     for(i = 0, p = flags; i < nb_flags; i++, p++) {
1841         if (!strcmp(r, p->name))
1842             goto found;
1843     }
1844     return -1;
1845  found:
1846     if (p->flags & FD_INVERT)
1847         value = !value;
1848     *(int *)((uint8_t *)s + p->offset) = value;
1849     return 0;
1850 }
1851
1852
1853 /* set/reset a warning */
1854 int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1855 {
1856     int i;
1857     const FlagDef *p;
1858
1859     if (!strcmp(warning_name, "all")) {
1860         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1861             if (p->flags & WD_ALL)
1862                 *(int *)((uint8_t *)s + p->offset) = 1;
1863         }
1864         return 0;
1865     } else {
1866         return set_flag(s, warning_defs, countof(warning_defs),
1867                         warning_name, value);
1868     }
1869 }
1870
1871 static const FlagDef flag_defs[] = {
1872     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1873     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1874     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1875     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1876 };
1877
1878 /* set/reset a flag */
1879 int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1880 {
1881     return set_flag(s, flag_defs, countof(flag_defs),
1882                     flag_name, value);
1883 }
1884
1885 /* set CONFIG_TCCDIR at runtime */
1886 void tcc_set_lib_path(TCCState *s, const char *path)
1887 {
1888     tcc_free(s->tcc_lib_path);
1889     s->tcc_lib_path = tcc_strdup(path);
1890 }
1891
1892 void tcc_print_stats(TCCState *s, int64_t total_time)
1893 {
1894     double tt;
1895     tt = (double)total_time / 1000000.0;
1896     if (tt < 0.001)
1897         tt = 0.001;
1898     if (total_bytes < 1)
1899         total_bytes = 1;
1900     printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
1901            tok_ident - TOK_IDENT, total_lines, total_bytes,
1902            tt, (int)(total_lines / tt),
1903            total_bytes / tt / 1000000.0);
1904 }