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 /* bound check related sections */
  62 static Section *bounds_section; /* contains global data bound description */
  63 static Section *lbounds_section; /* contains local data bound description */
  64 /* symbol sections */
  65 static Section *symtab_section, *strtab_section;
  66
  67 /* debug sections */
  68 static Section *stab_section, *stabstr_section;
  69
  70 /* loc : local variable index
  71    ind : output code index
  72    rsym: return symbol
  73    anon_sym: anonymous symbol index
  74 */
  75 static int rsym, anon_sym, ind, loc;
  76 /* expression generation modifiers */
  77 static int const_wanted; /* true if constant wanted */
  78 static int nocode_wanted; /* true if no code generation wanted for an expression */
  79 static int global_expr;  /* true if compound literals must be allocated
  80                             globally (used during initializers parsing */
  81 static CType func_vt; /* current function return type (used by return
  82                          instruction) */
  83 static int func_vc;
  84 static int last_line_num, last_ind, func_ind; /* debug last line number and pc */
  85 static int tok_ident;
  86 static TokenSym **table_ident;
  87 static TokenSym *hash_ident[TOK_HASH_SIZE];
  88 static char token_buf[STRING_MAX_SIZE + 1];
  89 static char *funcname;
  90 static Sym *global_stack, *local_stack;
  91 static Sym *define_stack;
  92 static Sym *global_label_stack, *local_label_stack;
  93 /* symbol allocator */
  94 #define SYM_POOL_NB (8192 / sizeof(Sym))
  95 static Sym *sym_free_first;
  96 static void **sym_pools;
  97 static int nb_sym_pools;
  98
  99 static SValue vstack[VSTACK_SIZE], *vtop;
 100 /* some predefined types */
 101 static CType char_pointer_type, func_old_type, int_type;
 102
 103 /* use GNU C extensions */
 104 static int gnu_ext = 1;
 105
 106 /* use Tiny C extensions */
 107 static int tcc_ext = 1;
 108
 109 /* max number of callers shown if error */
 110 #ifdef CONFIG_TCC_BACKTRACE
 111 int num_callers = 6;
 112 const char **rt_bound_error_msg;
 113 unsigned long rt_prog_main;
 114 #endif
 115
 116 /* XXX: get rid of this ASAP */
 117 static struct TCCState *tcc_state;
 118
 119 /********************************************************/
 120 /* function prototypes */
 121
 122 /* tccpp.c */
 123 static void next(void);
 124 char *get_tok_str(int v, CValue *cv);
 125
 126 /* tccgen.c */
 127 static void parse_expr_type(CType *type);
 128 static void expr_type(CType *type);
 129 static void unary_type(CType *type);
 130 static void block(int *bsym, int *csym, int *case_sym, int *def_sym,
 131                   int case_reg, int is_expr);
 132 static int expr_const(void);
 133 static void expr_eq(void);
 134 static void gexpr(void);
 135 static void gen_inline_functions(void);
 136 static void decl(int l);
 137 static void decl_initializer(CType *type, Section *sec, unsigned long c,
 138                              int first, int size_only);
 139 static void decl_initializer_alloc(CType *type, AttributeDef *ad, int r,
 140                                    int has_init, int v, int scope);
 141 int gv(int rc);
 142 void gv2(int rc1, int rc2);
 143 void move_reg(int r, int s);
 144 void save_regs(int n);
 145 void save_reg(int r);
 146 void vpop(void);
 147 void vswap(void);
 148 void vdup(void);
 149 int get_reg(int rc);
 150 int get_reg_ex(int rc,int rc2);
 151
 152 void gen_op(int op);
 153 void force_charshort_cast(int t);
 154 static void gen_cast(CType *type);
 155 void vstore(void);
 156 static Sym *sym_find(int v);
 157 static Sym *sym_push(int v, CType *type, int r, int c);
 158
 159 /* type handling */
 160 static int type_size(CType *type, int *a);
 161 static inline CType *pointed_type(CType *type);
 162 static int pointed_size(CType *type);
 163 static int lvalue_type(int t);
 164 static int parse_btype(CType *type, AttributeDef *ad);
 165 static void type_decl(CType *type, AttributeDef *ad, int *v, int td);
 166 static int compare_types(CType *type1, CType *type2, int unqualified);
 167 static int is_compatible_types(CType *type1, CType *type2);
 168 static int is_compatible_parameter_types(CType *type1, CType *type2);
 169
 170 int ieee_finite(double d);
 171 void vpushi(int v);
 172 void vpushll(long long v);
 173 void vrott(int n);
 174 void vnrott(int n);
 175 void lexpand_nr(void);
 176 static void vpush_global_sym(CType *type, int v);
 177 void vset(CType *type, int r, int v);
 178 void type_to_str(char *buf, int buf_size,
 179                  CType *type, const char *varstr);
 180 static Sym *get_sym_ref(CType *type, Section *sec,
 181                         unsigned long offset, unsigned long size);
 182 static Sym *external_global_sym(int v, CType *type, int r);
 183
 184 /* section generation */
 185 static void section_realloc(Section *sec, unsigned long new_size);
 186 static void *section_ptr_add(Section *sec, unsigned long size);
 187 static void put_extern_sym(Sym *sym, Section *section,
 188                            unsigned long value, unsigned long size);
 189 static void greloc(Section *s, Sym *sym, unsigned long addr, int type);
 190 static int put_elf_str(Section *s, const char *sym);
 191 static int put_elf_sym(Section *s,
 192                        unsigned long value, unsigned long size,
 193                        int info, int other, int shndx, const char *name);
 194 static int add_elf_sym(Section *s, uplong value, unsigned long size,
 195                        int info, int other, int sh_num, const char *name);
 196 static void put_elf_reloc(Section *symtab, Section *s, unsigned long offset,
 197                           int type, int symbol);
 198 static void put_stabs(const char *str, int type, int other, int desc,
 199                       unsigned long value);
 200 static void put_stabs_r(const char *str, int type, int other, int desc,
 201                         unsigned long value, Section *sec, int sym_index);
 202 static void put_stabn(int type, int other, int desc, int value);
 203 static void put_stabd(int type, int other, int desc);
 204 static int tcc_add_dll(TCCState *s, const char *filename, int flags);
 205
 206 #define AFF_PRINT_ERROR     0x0001 /* print error if file not found */
 207 #define AFF_REFERENCED_DLL  0x0002 /* load a referenced dll from another dll */
 208 #define AFF_PREPROCESS      0x0004 /* preprocess file */
 209 static int tcc_add_file_internal(TCCState *s, const char *filename, int flags);
 210
 211 /* tcccoff.c */
 212 int tcc_output_coff(TCCState *s1, FILE *f);
 213
 214 /* tccpe.c */
 215 int pe_load_file(struct TCCState *s1, const char *filename, int fd);
 216 int pe_output_file(struct TCCState *s1, const char *filename);
 217
 218 /* tccasm.c */
 219 #ifdef CONFIG_TCC_ASM
 220 static void asm_expr(TCCState *s1, ExprValue *pe);
 221 static int asm_int_expr(TCCState *s1);
 222 static int find_constraint(ASMOperand *operands, int nb_operands,
 223                            const char *name, const char **pp);
 224
 225 static int tcc_assemble(TCCState *s1, int do_preprocess);
 226 #endif
 227
 228 static void asm_instr(void);
 229 static void asm_global_instr(void);
 230
 231 /********************************************************/
 232 /* libtcc.c */
 233
 234 static Sym *__sym_malloc(void);
 235 static inline Sym *sym_malloc(void);
 236 static inline void sym_free(Sym *sym);
 237 Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags);
 238 static void free_section(Section *s);
 239 static void section_realloc(Section *sec, unsigned long new_size);
 240 static void *section_ptr_add(Section *sec, unsigned long size);
 241 Section *find_section(TCCState *s1, const char *name);
 242 static void put_extern_sym2(
 243     Sym *sym, Section *section,
 244     unsigned long value, unsigned long size, int can_add_underscore);
 245 static void put_extern_sym(
 246     Sym *sym, Section *section,
 247     unsigned long value, unsigned long size);
 248 static void greloc(Section *s, Sym *sym, unsigned long offset, int type);
 249
 250 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap);
 251 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...);
 252
 253 /* CString handling */
 254 static void cstr_realloc(CString *cstr, int new_size);
 255 static inline void cstr_ccat(CString *cstr, int ch);
 256 static void cstr_cat(CString *cstr, const char *str);
 257 static void cstr_wccat(CString *cstr, int ch);
 258 static void cstr_new(CString *cstr);
 259 static void cstr_free(CString *cstr);
 260 #define cstr_reset(cstr) cstr_free(cstr)
 261 static void add_char(CString *cstr, int c);
 262
 263 static Sym *sym_push2(Sym **ps, int v, int t, long c);
 264 static Sym *sym_find2(Sym *s, int v);
 265 static inline Sym *struct_find(int v);
 266 static inline Sym *sym_find(int v);
 267 static Sym *sym_push(int v, CType *type, int r, int c);
 268 static Sym *global_identifier_push(int v, int t, int c);
 269 static void sym_pop(Sym **ptop, Sym *b);
 270
 271 BufferedFile *tcc_open(TCCState *s1, const char *filename);
 272 void tcc_close(BufferedFile *bf);
 273 static int tcc_compile(TCCState *s1);
 274
 275 void expect(const char *msg);
 276 void skip(int c);
 277 static void test_lvalue(void);
 278 void *resolve_sym(TCCState *s1, const char *sym);
 279
 280 static inline int isid(int c)
 281 {
 282     return (c >= 'a' && c <= 'z')
 283         || (c >= 'A' && c <= 'Z')
 284         || c == '_';
 285 }
 286
 287 static inline int isnum(int c)
 288 {
 289     return c >= '0' && c <= '9';
 290 }
 291
 292 static inline int isoct(int c)
 293 {
 294     return c >= '0' && c <= '7';
 295 }
 296
 297 static inline int toup(int c)
 298 {
 299     if (c >= 'a' && c <= 'z')
 300         return c - 'a' + 'A';
 301     else
 302         return c;
 303 }
 304
 305 /********************************************************/
 306
 307 #ifdef TCC_TARGET_I386
 308 #include "i386-gen.c"
 309 #endif
 310
 311 #ifdef TCC_TARGET_ARM
 312 #include "arm-gen.c"
 313 #endif
 314
 315 #ifdef TCC_TARGET_C67
 316 #include "c67-gen.c"
 317 #endif
 318
 319 #ifdef TCC_TARGET_X86_64
 320 #include "x86_64-gen.c"
 321 #endif
 322
 323 #include "tccpp.c"
 324 #include "tccgen.c"
 325
 326 #ifdef CONFIG_TCC_ASM
 327
 328 #ifdef TCC_TARGET_I386
 329 #include "i386-asm.c"
 330 #endif
 331
 332 #ifdef TCC_TARGET_X86_64
 333 #include "x86_64-asm.c"
 334 #endif
 335
 336 #include "tccasm.c"
 337 #else
 338 static void asm_instr(void)
 339 {
 340     error("inline asm() not supported");
 341 }
 342 static void asm_global_instr(void)
 343 {
 344     error("inline asm() not supported");
 345 }
 346 #endif
 347
 348 #include "tccelf.c"
 349
 350 #ifdef TCC_TARGET_COFF
 351 #include "tcccoff.c"
 352 #endif
 353
 354 #ifdef TCC_TARGET_PE
 355 #include "tccpe.c"
 356 #endif
 357
 358 /********************************************************/
 359 #ifdef _WIN32
 360 char *normalize_slashes(char *path)
 361 {
 362     char *p;
 363     for (p = path; *p; ++p)
 364         if (*p == '\\')
 365             *p = '/';
 366     return path;
 367 }
 368
 369 HMODULE tcc_module;
 370
 371 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
 372 void tcc_set_lib_path_w32(TCCState *s)
 373 {
 374     char path[1024], *p;
 375     GetModuleFileNameA(tcc_module, path, sizeof path);
 376     p = tcc_basename(normalize_slashes(strlwr(path)));
 377     if (p - 5 > path && 0 == strncmp(p - 5, "/bin/", 5))
 378         p -= 5;
 379     else if (p > path)
 380         p--;
 381     *p = 0;
 382     tcc_set_lib_path(s, path);
 383 }
 384
 385 #ifdef LIBTCC_AS_DLL
 386 BOOL WINAPI DllMain (HANDLE hDll, DWORD dwReason, LPVOID lpReserved)
 387 {
 388     if (DLL_PROCESS_ATTACH == dwReason)
 389         tcc_module = hDll;
 390     return TRUE;
 391 }
 392 #endif
 393 #endif
 394
 395 /********************************************************/
 396 #ifdef CONFIG_TCC_STATIC
 397
 398 #define RTLD_LAZY       0x001
 399 #define RTLD_NOW        0x002
 400 #define RTLD_GLOBAL     0x100
 401 #define RTLD_DEFAULT    NULL
 402
 403 /* dummy function for profiling */
 404 void *dlopen(const char *filename, int flag)
 405 {
 406     return NULL;
 407 }
 408
 409 void dlclose(void *p)
 410 {
 411 }
 412
 413 const char *dlerror(void)
 414 {
 415     return "error";
 416 }
 417
 418 typedef struct TCCSyms {
 419     char *str;
 420     void *ptr;
 421 } TCCSyms;
 422
 423 #define TCCSYM(a) { #a, &a, },
 424
 425 /* add the symbol you want here if no dynamic linking is done */
 426 static TCCSyms tcc_syms[] = {
 427 #if !defined(CONFIG_TCCBOOT)
 428     TCCSYM(printf)
 429     TCCSYM(fprintf)
 430     TCCSYM(fopen)
 431     TCCSYM(fclose)
 432 #endif
 433     { NULL, NULL },
 434 };
 435
 436 void *resolve_sym(TCCState *s1, const char *symbol)
 437 {
 438     TCCSyms *p;
 439     p = tcc_syms;
 440     while (p->str != NULL) {
 441         if (!strcmp(p->str, symbol))
 442             return p->ptr;
 443         p++;
 444     }
 445     return NULL;
 446 }
 447
 448 #elif defined(_WIN32)
 449 #define dlclose FreeLibrary
 450
 451 #else
 452 #include <dlfcn.h>
 453
 454 void *resolve_sym(TCCState *s1, const char *sym)
 455 {
 456     return dlsym(RTLD_DEFAULT, sym);
 457 }
 458
 459 #endif
 460
 461 /********************************************************/
 462
 463 /* we use our own 'finite' function to avoid potential problems with
 464    non standard math libs */
 465 /* XXX: endianness dependent */
 466 int ieee_finite(double d)
 467 {
 468     int *p = (int *)&d;
 469     return ((unsigned)((p[1] | 0x800fffff) + 1)) >> 31;
 470 }
 471
 472 /* copy a string and truncate it. */
 473 char *pstrcpy(char *buf, int buf_size, const char *s)
 474 {
 475     char *q, *q_end;
 476     int c;
 477
 478     if (buf_size > 0) {
 479         q = buf;
 480         q_end = buf + buf_size - 1;
 481         while (q < q_end) {
 482             c = *s++;
 483             if (c == '\0')
 484                 break;
 485             *q++ = c;
 486         }
 487         *q = '\0';
 488     }
 489     return buf;
 490 }
 491
 492 /* strcat and truncate. */
 493 char *pstrcat(char *buf, int buf_size, const char *s)
 494 {
 495     int len;
 496     len = strlen(buf);
 497     if (len < buf_size)
 498         pstrcpy(buf + len, buf_size - len, s);
 499     return buf;
 500 }
 501
 502 /* extract the basename of a file */
 503 char *tcc_basename(const char *name)
 504 {
 505     char *p = strchr(name, 0);
 506     while (p > name && !IS_PATHSEP(p[-1]))
 507         --p;
 508     return p;
 509 }
 510
 511 char *tcc_fileextension (const char *name)
 512 {
 513     char *b = tcc_basename(name);
 514     char *e = strrchr(b, '.');
 515     return e ? e : strchr(b, 0);
 516 }
 517
 518 void set_pages_executable(void *ptr, unsigned long length)
 519 {
 520 #ifdef _WIN32
 521     unsigned long old_protect;
 522     VirtualProtect(ptr, length, PAGE_EXECUTE_READWRITE, &old_protect);
 523 #else
 524     unsigned long start, end;
 525     start = (unsigned long)ptr & ~(PAGESIZE - 1);
 526     end = (unsigned long)ptr + length;
 527     end = (end + PAGESIZE - 1) & ~(PAGESIZE - 1);
 528     mprotect((void *)start, end - start, PROT_READ | PROT_WRITE | PROT_EXEC);
 529 #endif
 530 }
 531
 532 /* memory management */
 533 #ifdef MEM_DEBUG
 534 int mem_cur_size;
 535 int mem_max_size;
 536 unsigned malloc_usable_size(void*);
 537 #endif
 538
 539 void tcc_free(void *ptr)
 540 {
 541 #ifdef MEM_DEBUG
 542     mem_cur_size -= malloc_usable_size(ptr);
 543 #endif
 544     free(ptr);
 545 }
 546
 547 void *tcc_malloc(unsigned long size)
 548 {
 549     void *ptr;
 550     ptr = malloc(size);
 551     if (!ptr && size)
 552         error("memory full");
 553 #ifdef MEM_DEBUG
 554     mem_cur_size += malloc_usable_size(ptr);
 555     if (mem_cur_size > mem_max_size)
 556         mem_max_size = mem_cur_size;
 557 #endif
 558     return ptr;
 559 }
 560
 561 void *tcc_mallocz(unsigned long size)
 562 {
 563     void *ptr;
 564     ptr = tcc_malloc(size);
 565     memset(ptr, 0, size);
 566     return ptr;
 567 }
 568
 569 void *tcc_realloc(void *ptr, unsigned long size)
 570 {
 571     void *ptr1;
 572 #ifdef MEM_DEBUG
 573     mem_cur_size -= malloc_usable_size(ptr);
 574 #endif
 575     ptr1 = realloc(ptr, size);
 576 #ifdef MEM_DEBUG
 577     /* NOTE: count not correct if alloc error, but not critical */
 578     mem_cur_size += malloc_usable_size(ptr1);
 579     if (mem_cur_size > mem_max_size)
 580         mem_max_size = mem_cur_size;
 581 #endif
 582     return ptr1;
 583 }
 584
 585 char *tcc_strdup(const char *str)
 586 {
 587     char *ptr;
 588     ptr = tcc_malloc(strlen(str) + 1);
 589     strcpy(ptr, str);
 590     return ptr;
 591 }
 592
 593 #define free(p) use_tcc_free(p)
 594 #define malloc(s) use_tcc_malloc(s)
 595 #define realloc(p, s) use_tcc_realloc(p, s)
 596
 597 void dynarray_add(void ***ptab, int *nb_ptr, void *data)
 598 {
 599     int nb, nb_alloc;
 600     void **pp;
 601
 602     nb = *nb_ptr;
 603     pp = *ptab;
 604     /* every power of two we double array size */
 605     if ((nb & (nb - 1)) == 0) {
 606         if (!nb)
 607             nb_alloc = 1;
 608         else
 609             nb_alloc = nb * 2;
 610         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 611         if (!pp)
 612             error("memory full");
 613         *ptab = pp;
 614     }
 615     pp[nb++] = data;
 616     *nb_ptr = nb;
 617 }
 618
 619 void dynarray_reset(void *pp, int *n)
 620 {
 621     void **p;
 622     for (p = *(void***)pp; *n; ++p, --*n)
 623         if (*p)
 624             tcc_free(*p);
 625     tcc_free(*(void**)pp);
 626     *(void**)pp = NULL;
 627 }
 628
 629 /* symbol allocator */
 630 static Sym *__sym_malloc(void)
 631 {
 632     Sym *sym_pool, *sym, *last_sym;
 633     int i;
 634
 635     sym_pool = tcc_malloc(SYM_POOL_NB * sizeof(Sym));
 636     dynarray_add(&sym_pools, &nb_sym_pools, sym_pool);
 637
 638     last_sym = sym_free_first;
 639     sym = sym_pool;
 640     for(i = 0; i < SYM_POOL_NB; i++) {
 641         sym->next = last_sym;
 642         last_sym = sym;
 643         sym++;
 644     }
 645     sym_free_first = last_sym;
 646     return last_sym;
 647 }
 648
 649 static inline Sym *sym_malloc(void)
 650 {
 651     Sym *sym;
 652     sym = sym_free_first;
 653     if (!sym)
 654         sym = __sym_malloc();
 655     sym_free_first = sym->next;
 656     return sym;
 657 }
 658
 659 static inline void sym_free(Sym *sym)
 660 {
 661     sym->next = sym_free_first;
 662     sym_free_first = sym;
 663 }
 664
 665 Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags)
 666 {
 667     Section *sec;
 668
 669     sec = tcc_mallocz(sizeof(Section) + strlen(name));
 670     strcpy(sec->name, name);
 671     sec->sh_type = sh_type;
 672     sec->sh_flags = sh_flags;
 673     switch(sh_type) {
 674     case SHT_HASH:
 675     case SHT_REL:
 676     case SHT_RELA:
 677     case SHT_DYNSYM:
 678     case SHT_SYMTAB:
 679     case SHT_DYNAMIC:
 680         sec->sh_addralign = 4;
 681         break;
 682     case SHT_STRTAB:
 683         sec->sh_addralign = 1;
 684         break;
 685     default:
 686         sec->sh_addralign = 32; /* default conservative alignment */
 687         break;
 688     }
 689
 690     if (sh_flags & SHF_PRIVATE) {
 691         dynarray_add((void ***)&s1->priv_sections, &s1->nb_priv_sections, sec);
 692     } else {
 693         sec->sh_num = s1->nb_sections;
 694         dynarray_add((void ***)&s1->sections, &s1->nb_sections, sec);
 695     }
 696
 697     return sec;
 698 }
 699
 700 static void free_section(Section *s)
 701 {
 702     tcc_free(s->data);
 703 }
 704
 705 /* realloc section and set its content to zero */
 706 static void section_realloc(Section *sec, unsigned long new_size)
 707 {
 708     unsigned long size;
 709     unsigned char *data;
 710
 711     size = sec->data_allocated;
 712     if (size == 0)
 713         size = 1;
 714     while (size < new_size)
 715         size = size * 2;
 716     data = tcc_realloc(sec->data, size);
 717     if (!data)
 718         error("memory full");
 719     memset(data + sec->data_allocated, 0, size - sec->data_allocated);
 720     sec->data = data;
 721     sec->data_allocated = size;
 722 }
 723
 724 /* reserve at least 'size' bytes in section 'sec' from
 725    sec->data_offset. */
 726 static void *section_ptr_add(Section *sec, unsigned long size)
 727 {
 728     unsigned long offset, offset1;
 729
 730     offset = sec->data_offset;
 731     offset1 = offset + size;
 732     if (offset1 > sec->data_allocated)
 733         section_realloc(sec, offset1);
 734     sec->data_offset = offset1;
 735     return sec->data + offset;
 736 }
 737
 738 /* return a reference to a section, and create it if it does not
 739    exists */
 740 Section *find_section(TCCState *s1, const char *name)
 741 {
 742     Section *sec;
 743     int i;
 744     for(i = 1; i < s1->nb_sections; i++) {
 745         sec = s1->sections[i];
 746         if (!strcmp(name, sec->name))
 747             return sec;
 748     }
 749     /* sections are created as PROGBITS */
 750     return new_section(s1, name, SHT_PROGBITS, SHF_ALLOC);
 751 }
 752
 753 /* update sym->c so that it points to an external symbol in section
 754    'section' with value 'value' */
 755 static void put_extern_sym2(Sym *sym, Section *section,
 756                             unsigned long value, unsigned long size,
 757                             int can_add_underscore)
 758 {
 759     int sym_type, sym_bind, sh_num, info, other, attr;
 760     ElfW(Sym) *esym;
 761     const char *name;
 762     char buf1[256];
 763
 764     if (section == NULL)
 765         sh_num = SHN_UNDEF;
 766     else if (section == SECTION_ABS)
 767         sh_num = SHN_ABS;
 768     else
 769         sh_num = section->sh_num;
 770
 771     other = attr = 0;
 772
 773     if ((sym->type.t & VT_BTYPE) == VT_FUNC) {
 774         sym_type = STT_FUNC;
 775 #ifdef TCC_TARGET_PE
 776         if (sym->type.ref)
 777             attr = sym->type.ref->r;
 778         if (FUNC_EXPORT(attr))
 779             other |= 1;
 780         if (FUNC_CALL(attr) == FUNC_STDCALL)
 781             other |= 2;
 782 #endif
 783     } else {
 784         sym_type = STT_OBJECT;
 785     }
 786
 787     if (sym->type.t & VT_STATIC)
 788         sym_bind = STB_LOCAL;
 789     else
 790         sym_bind = STB_GLOBAL;
 791
 792     if (!sym->c) {
 793         name = get_tok_str(sym->v, NULL);
 794 #ifdef CONFIG_TCC_BCHECK
 795         if (tcc_state->do_bounds_check) {
 796             char buf[32];
 797
 798             /* XXX: avoid doing that for statics ? */
 799             /* if bound checking is activated, we change some function
 800                names by adding the "__bound" prefix */
 801             switch(sym->v) {
 802 #if 0
 803             /* XXX: we rely only on malloc hooks */
 804             case TOK_malloc:
 805             case TOK_free:
 806             case TOK_realloc:
 807             case TOK_memalign:
 808             case TOK_calloc:
 809 #endif
 810             case TOK_memcpy:
 811             case TOK_memmove:
 812             case TOK_memset:
 813             case TOK_strlen:
 814             case TOK_strcpy:
 815             case TOK_alloca:
 816                 strcpy(buf, "__bound_");
 817                 strcat(buf, name);
 818                 name = buf;
 819                 break;
 820             }
 821         }
 822 #endif
 823
 824 #ifdef TCC_TARGET_PE
 825         if ((other & 2) && can_add_underscore) {
 826             sprintf(buf1, "_%s@%d", name, FUNC_ARGS(attr));
 827             name = buf1;
 828         } else
 829 #endif
 830         if (tcc_state->leading_underscore && can_add_underscore) {
 831             buf1[0] = '_';
 832             pstrcpy(buf1 + 1, sizeof(buf1) - 1, name);
 833             name = buf1;
 834         }
 835         info = ELFW(ST_INFO)(sym_bind, sym_type);
 836         sym->c = add_elf_sym(symtab_section, value, size, info, other, sh_num, name);
 837     } else {
 838         esym = &((ElfW(Sym) *)symtab_section->data)[sym->c];
 839         esym->st_value = value;
 840         esym->st_size = size;
 841         esym->st_shndx = sh_num;
 842         esym->st_other |= other;
 843     }
 844 }
 845
 846 static void put_extern_sym(Sym *sym, Section *section,
 847                            unsigned long value, unsigned long size)
 848 {
 849     put_extern_sym2(sym, section, value, size, 1);
 850 }
 851
 852 /* add a new relocation entry to symbol 'sym' in section 's' */
 853 static void greloc(Section *s, Sym *sym, unsigned long offset, int type)
 854 {
 855     if (!sym->c)
 856         put_extern_sym(sym, NULL, 0, 0);
 857     /* now we can add ELF relocation info */
 858     put_elf_reloc(symtab_section, s, offset, type, sym->c);
 859 }
 860
 861 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 862 {
 863     int len;
 864     len = strlen(buf);
 865     vsnprintf(buf + len, buf_size - len, fmt, ap);
 866 }
 867
 868 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 869 {
 870     va_list ap;
 871     va_start(ap, fmt);
 872     strcat_vprintf(buf, buf_size, fmt, ap);
 873     va_end(ap);
 874 }
 875
 876 void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 877 {
 878     char buf[2048];
 879     BufferedFile **f;
 880
 881     buf[0] = '\0';
 882     if (file) {
 883         for(f = s1->include_stack; f < s1->include_stack_ptr; f++)
 884             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 885                           (*f)->filename, (*f)->line_num);
 886         if (file->line_num > 0) {
 887             strcat_printf(buf, sizeof(buf),
 888                           "%s:%d: ", file->filename, file->line_num);
 889         } else {
 890             strcat_printf(buf, sizeof(buf),
 891                           "%s: ", file->filename);
 892         }
 893     } else {
 894         strcat_printf(buf, sizeof(buf),
 895                       "tcc: ");
 896     }
 897     if (is_warning)
 898         strcat_printf(buf, sizeof(buf), "warning: ");
 899     else
 900         strcat_printf(buf, sizeof(buf), "error: ");
 901     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 902
 903     if (!s1->error_func) {
 904         /* default case: stderr */
 905         fprintf(stderr, "%s\n", buf);
 906     } else {
 907         s1->error_func(s1->error_opaque, buf);
 908     }
 909     if (!is_warning || s1->warn_error)
 910         s1->nb_errors++;
 911 }
 912
 913 void tcc_set_error_func(TCCState *s, void *error_opaque,
 914                         void (*error_func)(void *opaque, const char *msg))
 915 {
 916     s->error_opaque = error_opaque;
 917     s->error_func = error_func;
 918 }
 919
 920 /* error without aborting current compilation */
 921 void error_noabort(const char *fmt, ...)
 922 {
 923     TCCState *s1 = tcc_state;
 924     va_list ap;
 925
 926     va_start(ap, fmt);
 927     error1(s1, 0, fmt, ap);
 928     va_end(ap);
 929 }
 930
 931 void error(const char *fmt, ...)
 932 {
 933     TCCState *s1 = tcc_state;
 934     va_list ap;
 935
 936     va_start(ap, fmt);
 937     error1(s1, 0, fmt, ap);
 938     va_end(ap);
 939     /* better than nothing: in some cases, we accept to handle errors */
 940     if (s1->error_set_jmp_enabled) {
 941         longjmp(s1->error_jmp_buf, 1);
 942     } else {
 943         /* XXX: eliminate this someday */
 944         exit(1);
 945     }
 946 }
 947
 948 void expect(const char *msg)
 949 {
 950     error("%s expected", msg);
 951 }
 952
 953 void warning(const char *fmt, ...)
 954 {
 955     TCCState *s1 = tcc_state;
 956     va_list ap;
 957
 958     if (s1->warn_none)
 959         return;
 960
 961     va_start(ap, fmt);
 962     error1(s1, 1, fmt, ap);
 963     va_end(ap);
 964 }
 965
 966 void skip(int c)
 967 {
 968     if (tok != c)
 969         error("'%c' expected", c);
 970     next();
 971 }
 972
 973 static void test_lvalue(void)
 974 {
 975     if (!(vtop->r & VT_LVAL))
 976         expect("lvalue");
 977 }
 978
 979 /* CString handling */
 980
 981 static void cstr_realloc(CString *cstr, int new_size)
 982 {
 983     int size;
 984     void *data;
 985
 986     size = cstr->size_allocated;
 987     if (size == 0)
 988         size = 8; /* no need to allocate a too small first string */
 989     while (size < new_size)
 990         size = size * 2;
 991     data = tcc_realloc(cstr->data_allocated, size);
 992     if (!data)
 993         error("memory full");
 994     cstr->data_allocated = data;
 995     cstr->size_allocated = size;
 996     cstr->data = data;
 997 }
 998
 999 /* add a byte */
1000 static inline void cstr_ccat(CString *cstr, int ch)
1001 {
1002     int size;
1003     size = cstr->size + 1;
1004     if (size > cstr->size_allocated)
1005         cstr_realloc(cstr, size);
1006     ((unsigned char *)cstr->data)[size - 1] = ch;
1007     cstr->size = size;
1008 }
1009
1010 static void cstr_cat(CString *cstr, const char *str)
1011 {
1012     int c;
1013     for(;;) {
1014         c = *str;
1015         if (c == '\0')
1016             break;
1017         cstr_ccat(cstr, c);
1018         str++;
1019     }
1020 }
1021
1022 /* add a wide char */
1023 static void cstr_wccat(CString *cstr, int ch)
1024 {
1025     int size;
1026     size = cstr->size + sizeof(nwchar_t);
1027     if (size > cstr->size_allocated)
1028         cstr_realloc(cstr, size);
1029     *(nwchar_t *)(((unsigned char *)cstr->data) + size - sizeof(nwchar_t)) = ch;
1030     cstr->size = size;
1031 }
1032
1033 static void cstr_new(CString *cstr)
1034 {
1035     memset(cstr, 0, sizeof(CString));
1036 }
1037
1038 /* free string and reset it to NULL */
1039 static void cstr_free(CString *cstr)
1040 {
1041     tcc_free(cstr->data_allocated);
1042     cstr_new(cstr);
1043 }
1044
1045 #define cstr_reset(cstr) cstr_free(cstr)
1046
1047 /* XXX: unicode ? */
1048 static void add_char(CString *cstr, int c)
1049 {
1050     if (c == '\'' || c == '\"' || c == '\\') {
1051         /* XXX: could be more precise if char or string */
1052         cstr_ccat(cstr, '\\');
1053     }
1054     if (c >= 32 && c <= 126) {
1055         cstr_ccat(cstr, c);
1056     } else {
1057         cstr_ccat(cstr, '\\');
1058         if (c == '\n') {
1059             cstr_ccat(cstr, 'n');
1060         } else {
1061             cstr_ccat(cstr, '0' + ((c >> 6) & 7));
1062             cstr_ccat(cstr, '0' + ((c >> 3) & 7));
1063             cstr_ccat(cstr, '0' + (c & 7));
1064         }
1065     }
1066 }
1067
1068 /* push, without hashing */
1069 static Sym *sym_push2(Sym **ps, int v, int t, long c)
1070 {
1071     Sym *s;
1072     s = sym_malloc();
1073     s->v = v;
1074     s->type.t = t;
1075 #ifdef _WIN64
1076     s->d = NULL;
1077 #endif
1078     s->c = c;
1079     s->next = NULL;
1080     /* add in stack */
1081     s->prev = *ps;
1082     *ps = s;
1083     return s;
1084 }
1085
1086 /* find a symbol and return its associated structure. 's' is the top
1087    of the symbol stack */
1088 static Sym *sym_find2(Sym *s, int v)
1089 {
1090     while (s) {
1091         if (s->v == v)
1092             return s;
1093         s = s->prev;
1094     }
1095     return NULL;
1096 }
1097
1098 /* structure lookup */
1099 static inline Sym *struct_find(int v)
1100 {
1101     v -= TOK_IDENT;
1102     if ((unsigned)v >= (unsigned)(tok_ident - TOK_IDENT))
1103         return NULL;
1104     return table_ident[v]->sym_struct;
1105 }
1106
1107 /* find an identifier */
1108 static inline Sym *sym_find(int v)
1109 {
1110     v -= TOK_IDENT;
1111     if ((unsigned)v >= (unsigned)(tok_ident - TOK_IDENT))
1112         return NULL;
1113     return table_ident[v]->sym_identifier;
1114 }
1115
1116 /* push a given symbol on the symbol stack */
1117 static Sym *sym_push(int v, CType *type, int r, int c)
1118 {
1119     Sym *s, **ps;
1120     TokenSym *ts;
1121
1122     if (local_stack)
1123         ps = &local_stack;
1124     else
1125         ps = &global_stack;
1126     s = sym_push2(ps, v, type->t, c);
1127     s->type.ref = type->ref;
1128     s->r = r;
1129     /* don't record fields or anonymous symbols */
1130     /* XXX: simplify */
1131     if (!(v & SYM_FIELD) && (v & ~SYM_STRUCT) < SYM_FIRST_ANOM) {
1132         /* record symbol in token array */
1133         ts = table_ident[(v & ~SYM_STRUCT) - TOK_IDENT];
1134         if (v & SYM_STRUCT)
1135             ps = &ts->sym_struct;
1136         else
1137             ps = &ts->sym_identifier;
1138         s->prev_tok = *ps;
1139         *ps = s;
1140     }
1141     return s;
1142 }
1143
1144 /* push a global identifier */
1145 static Sym *global_identifier_push(int v, int t, int c)
1146 {
1147     Sym *s, **ps;
1148     s = sym_push2(&global_stack, v, t, c);
1149     /* don't record anonymous symbol */
1150     if (v < SYM_FIRST_ANOM) {
1151         ps = &table_ident[v - TOK_IDENT]->sym_identifier;
1152         /* modify the top most local identifier, so that
1153            sym_identifier will point to 's' when popped */
1154         while (*ps != NULL)
1155             ps = &(*ps)->prev_tok;
1156         s->prev_tok = NULL;
1157         *ps = s;
1158     }
1159     return s;
1160 }
1161
1162 /* pop symbols until top reaches 'b' */
1163 static void sym_pop(Sym **ptop, Sym *b)
1164 {
1165     Sym *s, *ss, **ps;
1166     TokenSym *ts;
1167     int v;
1168
1169     s = *ptop;
1170     while(s != b) {
1171         ss = s->prev;
1172         v = s->v;
1173         /* remove symbol in token array */
1174         /* XXX: simplify */
1175         if (!(v & SYM_FIELD) && (v & ~SYM_STRUCT) < SYM_FIRST_ANOM) {
1176             ts = table_ident[(v & ~SYM_STRUCT) - TOK_IDENT];
1177             if (v & SYM_STRUCT)
1178                 ps = &ts->sym_struct;
1179             else
1180                 ps = &ts->sym_identifier;
1181             *ps = s->prev_tok;
1182         }
1183         sym_free(s);
1184         s = ss;
1185     }
1186     *ptop = b;
1187 }
1188
1189 /* I/O layer */
1190
1191 BufferedFile *tcc_open(TCCState *s1, const char *filename)
1192 {
1193     int fd;
1194     BufferedFile *bf;
1195
1196     if (strcmp(filename, "-") == 0)
1197         fd = 0, filename = "stdin";
1198     else
1199         fd = open(filename, O_RDONLY | O_BINARY);
1200     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
1201         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
1202                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
1203     if (fd < 0)
1204         return NULL;
1205     bf = tcc_malloc(sizeof(BufferedFile));
1206     bf->fd = fd;
1207     bf->buf_ptr = bf->buffer;
1208     bf->buf_end = bf->buffer;
1209     bf->buffer[0] = CH_EOB; /* put eob symbol */
1210     pstrcpy(bf->filename, sizeof(bf->filename), filename);
1211 #ifdef _WIN32
1212     normalize_slashes(bf->filename);
1213 #endif
1214     bf->line_num = 1;
1215     bf->ifndef_macro = 0;
1216     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
1217     //    printf("opening '%s'\n", filename);
1218     return bf;
1219 }
1220
1221 void tcc_close(BufferedFile *bf)
1222 {
1223     total_lines += bf->line_num;
1224     close(bf->fd);
1225     tcc_free(bf);
1226 }
1227
1228 /* compile the C file opened in 'file'. Return non zero if errors. */
1229 static int tcc_compile(TCCState *s1)
1230 {
1231     Sym *define_start;
1232     char buf[512];
1233     volatile int section_sym;
1234
1235 #ifdef INC_DEBUG
1236     printf("%s: **** new file\n", file->filename);
1237 #endif
1238     preprocess_init(s1);
1239
1240     cur_text_section = NULL;
1241     funcname = "";
1242     anon_sym = SYM_FIRST_ANOM;
1243
1244     /* file info: full path + filename */
1245     section_sym = 0; /* avoid warning */
1246     if (s1->do_debug) {
1247         section_sym = put_elf_sym(symtab_section, 0, 0,
1248                                   ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
1249                                   text_section->sh_num, NULL);
1250         getcwd(buf, sizeof(buf));
1251 #ifdef _WIN32
1252         normalize_slashes(buf);
1253 #endif
1254         pstrcat(buf, sizeof(buf), "/");
1255         put_stabs_r(buf, N_SO, 0, 0,
1256                     text_section->data_offset, text_section, section_sym);
1257         put_stabs_r(file->filename, N_SO, 0, 0,
1258                     text_section->data_offset, text_section, section_sym);
1259     }
1260     /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
1261        symbols can be safely used */
1262     put_elf_sym(symtab_section, 0, 0,
1263                 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
1264                 SHN_ABS, file->filename);
1265
1266     /* define some often used types */
1267     int_type.t = VT_INT;
1268
1269     char_pointer_type.t = VT_BYTE;
1270     mk_pointer(&char_pointer_type);
1271
1272     func_old_type.t = VT_FUNC;
1273     func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
1274
1275 #if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP)
1276     float_type.t = VT_FLOAT;
1277     double_type.t = VT_DOUBLE;
1278
1279     func_float_type.t = VT_FUNC;
1280     func_float_type.ref = sym_push(SYM_FIELD, &float_type, FUNC_CDECL, FUNC_OLD);
1281     func_double_type.t = VT_FUNC;
1282     func_double_type.ref = sym_push(SYM_FIELD, &double_type, FUNC_CDECL, FUNC_OLD);
1283 #endif
1284
1285 #if 0
1286     /* define 'void *alloca(unsigned int)' builtin function */
1287     {
1288         Sym *s1;
1289
1290         p = anon_sym++;
1291         sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
1292         s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
1293         s1->next = NULL;
1294         sym->next = s1;
1295         sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
1296     }
1297 #endif
1298
1299     define_start = define_stack;
1300     nocode_wanted = 1;
1301
1302     if (setjmp(s1->error_jmp_buf) == 0) {
1303         s1->nb_errors = 0;
1304         s1->error_set_jmp_enabled = 1;
1305
1306         ch = file->buf_ptr[0];
1307         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
1308         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
1309         next();
1310         decl(VT_CONST);
1311         if (tok != TOK_EOF)
1312             expect("declaration");
1313
1314         /* end of translation unit info */
1315         if (s1->do_debug) {
1316             put_stabs_r(NULL, N_SO, 0, 0,
1317                         text_section->data_offset, text_section, section_sym);
1318         }
1319     }
1320     s1->error_set_jmp_enabled = 0;
1321
1322     /* reset define stack, but leave -Dsymbols (may be incorrect if
1323        they are undefined) */
1324     free_defines(define_start);
1325
1326     gen_inline_functions();
1327
1328     sym_pop(&global_stack, NULL);
1329     sym_pop(&local_stack, NULL);
1330
1331     return s1->nb_errors != 0 ? -1 : 0;
1332 }
1333
1334 int tcc_compile_string(TCCState *s, const char *str)
1335 {
1336     BufferedFile bf1, *bf = &bf1;
1337     int ret, len;
1338     char *buf;
1339
1340     /* init file structure */
1341     bf->fd = -1;
1342     /* XXX: avoid copying */
1343     len = strlen(str);
1344     buf = tcc_malloc(len + 1);
1345     if (!buf)
1346         return -1;
1347     memcpy(buf, str, len);
1348     buf[len] = CH_EOB;
1349     bf->buf_ptr = buf;
1350     bf->buf_end = buf + len;
1351     pstrcpy(bf->filename, sizeof(bf->filename), "<string>");
1352     bf->line_num = 1;
1353     file = bf;
1354     ret = tcc_compile(s);
1355     file = NULL;
1356     tcc_free(buf);
1357
1358     /* currently, no need to close */
1359     return ret;
1360 }
1361
1362 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
1363 void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
1364 {
1365     BufferedFile bf1, *bf = &bf1;
1366
1367     pstrcpy(bf->buffer, IO_BUF_SIZE, sym);
1368     pstrcat(bf->buffer, IO_BUF_SIZE, " ");
1369     /* default value */
1370     if (!value)
1371         value = "1";
1372     pstrcat(bf->buffer, IO_BUF_SIZE, value);
1373
1374     /* init file structure */
1375     bf->fd = -1;
1376     bf->buf_ptr = bf->buffer;
1377     bf->buf_end = bf->buffer + strlen(bf->buffer);
1378     *bf->buf_end = CH_EOB;
1379     bf->filename[0] = '\0';
1380     bf->line_num = 1;
1381     file = bf;
1382
1383     s1->include_stack_ptr = s1->include_stack;
1384
1385     /* parse with define parser */
1386     ch = file->buf_ptr[0];
1387     next_nomacro();
1388     parse_define();
1389     file = NULL;
1390 }
1391
1392 /* undefine a preprocessor symbol */
1393 void tcc_undefine_symbol(TCCState *s1, const char *sym)
1394 {
1395     TokenSym *ts;
1396     Sym *s;
1397     ts = tok_alloc(sym, strlen(sym));
1398     s = define_find(ts->tok);
1399     /* undefine symbol by putting an invalid name */
1400     if (s)
1401         define_undef(s);
1402 }
1403
1404
1405 #ifdef CONFIG_TCC_BACKTRACE
1406 /* print the position in the source file of PC value 'pc' by reading
1407    the stabs debug information */
1408 static unsigned long rt_printline(unsigned long wanted_pc)
1409 {
1410     Stab_Sym *sym, *sym_end;
1411     char func_name[128], last_func_name[128];
1412     unsigned long func_addr, last_pc, pc;
1413     const char *incl_files[INCLUDE_STACK_SIZE];
1414     int incl_index, len, last_line_num, i;
1415     const char *str, *p;
1416
1417     fprintf(stderr, "0x%08lx:", wanted_pc);
1418
1419     func_name[0] = '\0';
1420     func_addr = 0;
1421     incl_index = 0;
1422     last_func_name[0] = '\0';
1423     last_pc = 0xffffffff;
1424     last_line_num = 1;
1425     sym = (Stab_Sym *)stab_section->data + 1;
1426     sym_end = (Stab_Sym *)(stab_section->data + stab_section->data_offset);
1427     while (sym < sym_end) {
1428         switch(sym->n_type) {
1429             /* function start or end */
1430         case N_FUN:
1431             if (sym->n_strx == 0) {
1432                 /* we test if between last line and end of function */
1433                 pc = sym->n_value + func_addr;
1434                 if (wanted_pc >= last_pc && wanted_pc < pc)
1435                     goto found;
1436                 func_name[0] = '\0';
1437                 func_addr = 0;
1438             } else {
1439                 str = stabstr_section->data + sym->n_strx;
1440                 p = strchr(str, ':');
1441                 if (!p) {
1442                     pstrcpy(func_name, sizeof(func_name), str);
1443                 } else {
1444                     len = p - str;
1445                     if (len > sizeof(func_name) - 1)
1446                         len = sizeof(func_name) - 1;
1447                     memcpy(func_name, str, len);
1448                     func_name[len] = '\0';
1449                 }
1450                 func_addr = sym->n_value;
1451             }
1452             break;
1453             /* line number info */
1454         case N_SLINE:
1455             pc = sym->n_value + func_addr;
1456             if (wanted_pc >= last_pc && wanted_pc < pc)
1457                 goto found;
1458             last_pc = pc;
1459             last_line_num = sym->n_desc;
1460             /* XXX: slow! */
1461             strcpy(last_func_name, func_name);
1462             break;
1463             /* include files */
1464         case N_BINCL:
1465             str = stabstr_section->data + sym->n_strx;
1466         add_incl:
1467             if (incl_index < INCLUDE_STACK_SIZE) {
1468                 incl_files[incl_index++] = str;
1469             }
1470             break;
1471         case N_EINCL:
1472             if (incl_index > 1)
1473                 incl_index--;
1474             break;
1475         case N_SO:
1476             if (sym->n_strx == 0) {
1477                 incl_index = 0; /* end of translation unit */
1478             } else {
1479                 str = stabstr_section->data + sym->n_strx;
1480                 /* do not add path */
1481                 len = strlen(str);
1482                 if (len > 0 && str[len - 1] != '/')
1483                     goto add_incl;
1484             }
1485             break;
1486         }
1487         sym++;
1488     }
1489
1490     /* second pass: we try symtab symbols (no line number info) */
1491     incl_index = 0;
1492     {
1493         ElfW(Sym) *sym, *sym_end;
1494         int type;
1495
1496         sym_end = (ElfW(Sym) *)(symtab_section->data + symtab_section->data_offset);
1497         for(sym = (ElfW(Sym) *)symtab_section->data + 1;
1498             sym < sym_end;
1499             sym++) {
1500             type = ELFW(ST_TYPE)(sym->st_info);
1501             if (type == STT_FUNC) {
1502                 if (wanted_pc >= sym->st_value &&
1503                     wanted_pc < sym->st_value + sym->st_size) {
1504                     pstrcpy(last_func_name, sizeof(last_func_name),
1505                             strtab_section->data + sym->st_name);
1506                     func_addr = sym->st_value;
1507                     goto found;
1508                 }
1509             }
1510         }
1511     }
1512     /* did not find any info: */
1513     fprintf(stderr, " ???\n");
1514     return 0;
1515  found:
1516     if (last_func_name[0] != '\0') {
1517         fprintf(stderr, " %s()", last_func_name);
1518     }
1519     if (incl_index > 0) {
1520         fprintf(stderr, " (%s:%d",
1521                 incl_files[incl_index - 1], last_line_num);
1522         for(i = incl_index - 2; i >= 0; i--)
1523             fprintf(stderr, ", included from %s", incl_files[i]);
1524         fprintf(stderr, ")");
1525     }
1526     fprintf(stderr, "\n");
1527     return func_addr;
1528 }
1529
1530 #ifdef __i386__
1531 /* fix for glibc 2.1 */
1532 #ifndef REG_EIP
1533 #define REG_EIP EIP
1534 #define REG_EBP EBP
1535 #endif
1536
1537 /* return the PC at frame level 'level'. Return non zero if not found */
1538 static int rt_get_caller_pc(unsigned long *paddr,
1539                             ucontext_t *uc, int level)
1540 {
1541     unsigned long fp;
1542     int i;
1543
1544     if (level == 0) {
1545 #if defined(__FreeBSD__)
1546         *paddr = uc->uc_mcontext.mc_eip;
1547 #elif defined(__dietlibc__)
1548         *paddr = uc->uc_mcontext.eip;
1549 #else
1550         *paddr = uc->uc_mcontext.gregs[REG_EIP];
1551 #endif
1552         return 0;
1553     } else {
1554 #if defined(__FreeBSD__)
1555         fp = uc->uc_mcontext.mc_ebp;
1556 #elif defined(__dietlibc__)
1557         fp = uc->uc_mcontext.ebp;
1558 #else
1559         fp = uc->uc_mcontext.gregs[REG_EBP];
1560 #endif
1561         for(i=1;i<level;i++) {
1562             /* XXX: check address validity with program info */
1563             if (fp <= 0x1000 || fp >= 0xc0000000)
1564                 return -1;
1565             fp = ((unsigned long *)fp)[0];
1566         }
1567         *paddr = ((unsigned long *)fp)[1];
1568         return 0;
1569     }
1570 }
1571 #elif defined(__x86_64__)
1572 /* return the PC at frame level 'level'. Return non zero if not found */
1573 static int rt_get_caller_pc(unsigned long *paddr,
1574                             ucontext_t *uc, int level)
1575 {
1576     unsigned long fp;
1577     int i;
1578
1579     if (level == 0) {
1580         /* XXX: only support linux */
1581         *paddr = uc->uc_mcontext.gregs[REG_RIP];
1582         return 0;
1583     } else {
1584         fp = uc->uc_mcontext.gregs[REG_RBP];
1585         for(i=1;i<level;i++) {
1586             /* XXX: check address validity with program info */
1587             if (fp <= 0x1000)
1588                 return -1;
1589             fp = ((unsigned long *)fp)[0];
1590         }
1591         *paddr = ((unsigned long *)fp)[1];
1592         return 0;
1593     }
1594 }
1595 #else
1596 #warning add arch specific rt_get_caller_pc()
1597 static int rt_get_caller_pc(unsigned long *paddr,
1598                             ucontext_t *uc, int level)
1599 {
1600     return -1;
1601 }
1602 #endif
1603
1604 /* emit a run time error at position 'pc' */
1605 void rt_error(ucontext_t *uc, const char *fmt, ...)
1606 {
1607     va_list ap;
1608     unsigned long pc;
1609     int i;
1610
1611     va_start(ap, fmt);
1612     fprintf(stderr, "Runtime error: ");
1613     vfprintf(stderr, fmt, ap);
1614     fprintf(stderr, "\n");
1615     for(i=0;i<num_callers;i++) {
1616         if (rt_get_caller_pc(&pc, uc, i) < 0)
1617             break;
1618         if (i == 0)
1619             fprintf(stderr, "at ");
1620         else
1621             fprintf(stderr, "by ");
1622         pc = rt_printline(pc);
1623         if (pc == rt_prog_main && pc)
1624             break;
1625     }
1626     exit(255);
1627     va_end(ap);
1628 }
1629
1630 /* signal handler for fatal errors */
1631 static void sig_error(int signum, siginfo_t *siginf, void *puc)
1632 {
1633     ucontext_t *uc = puc;
1634
1635     switch(signum) {
1636     case SIGFPE:
1637         switch(siginf->si_code) {
1638         case FPE_INTDIV:
1639         case FPE_FLTDIV:
1640             rt_error(uc, "division by zero");
1641             break;
1642         default:
1643             rt_error(uc, "floating point exception");
1644             break;
1645         }
1646         break;
1647     case SIGBUS:
1648     case SIGSEGV:
1649         if (rt_bound_error_msg && *rt_bound_error_msg)
1650             rt_error(uc, *rt_bound_error_msg);
1651         else
1652             rt_error(uc, "dereferencing invalid pointer");
1653         break;
1654     case SIGILL:
1655         rt_error(uc, "illegal instruction");
1656         break;
1657     case SIGABRT:
1658         rt_error(uc, "abort() called");
1659         break;
1660     default:
1661         rt_error(uc, "caught signal %d", signum);
1662         break;
1663     }
1664     exit(255);
1665 }
1666
1667 #endif
1668
1669 /* copy code into memory passed in by the caller and do all relocations
1670    (needed before using tcc_get_symbol()).
1671    returns -1 on error and required size if ptr is NULL */
1672 int tcc_relocate(TCCState *s1, void *ptr)
1673 {
1674     Section *s;
1675     unsigned long offset, length;
1676     uplong mem;
1677     int i;
1678
1679     if (0 == s1->runtime_added) {
1680         s1->runtime_added = 1;
1681         s1->nb_errors = 0;
1682 #ifdef TCC_TARGET_PE
1683         pe_output_file(s1, NULL);
1684 #else
1685         tcc_add_runtime(s1);
1686         relocate_common_syms();
1687         tcc_add_linker_symbols(s1);
1688         build_got_entries(s1);
1689 #endif
1690         if (s1->nb_errors)
1691             return -1;
1692     }
1693
1694     offset = 0, mem = (uplong)ptr;
1695     for(i = 1; i < s1->nb_sections; i++) {
1696         s = s1->sections[i];
1697         if (0 == (s->sh_flags & SHF_ALLOC))
1698             continue;
1699         length = s->data_offset;
1700         s->sh_addr = mem ? (mem + offset + 15) & ~15 : 0;
1701         offset = (offset + length + 15) & ~15;
1702     }
1703
1704     /* relocate symbols */
1705     relocate_syms(s1, 1);
1706     if (s1->nb_errors)
1707         return -1;
1708
1709 #ifndef TCC_TARGET_PE
1710 #ifdef TCC_TARGET_X86_64
1711     s1->runtime_plt_and_got_offset = 0;
1712     s1->runtime_plt_and_got = (char *)(mem + offset);
1713     /* double the size of the buffer for got and plt entries
1714        XXX: calculate exact size for them? */
1715     offset *= 2;
1716 #endif
1717 #endif
1718
1719     if (0 == mem)
1720         return offset + 15;
1721
1722     /* relocate each section */
1723     for(i = 1; i < s1->nb_sections; i++) {
1724         s = s1->sections[i];
1725         if (s->reloc)
1726             relocate_section(s1, s);
1727     }
1728
1729     for(i = 1; i < s1->nb_sections; i++) {
1730         s = s1->sections[i];
1731         if (0 == (s->sh_flags & SHF_ALLOC))
1732             continue;
1733         length = s->data_offset;
1734         // printf("%-12s %08x %04x\n", s->name, s->sh_addr, length);
1735         ptr = (void*)(uplong)s->sh_addr;
1736         if (NULL == s->data || s->sh_type == SHT_NOBITS)
1737             memset(ptr, 0, length);
1738         else
1739             memcpy(ptr, s->data, length);
1740         /* mark executable sections as executable in memory */
1741         if (s->sh_flags & SHF_EXECINSTR)
1742             set_pages_executable(ptr, length);
1743     }
1744 #ifndef TCC_TARGET_PE
1745 #ifdef TCC_TARGET_X86_64
1746     set_pages_executable(s1->runtime_plt_and_got,
1747                          s1->runtime_plt_and_got_offset);
1748 #endif
1749 #endif
1750     return 0;
1751 }
1752
1753 /* launch the compiled program with the given arguments */
1754 int tcc_run(TCCState *s1, int argc, char **argv)
1755 {
1756     int (*prog_main)(int, char **);
1757     void *ptr;
1758     int ret;
1759
1760     ret = tcc_relocate(s1, NULL);
1761     if (ret < 0)
1762         return -1;
1763     ptr = tcc_malloc(ret);
1764     tcc_relocate(s1, ptr);
1765
1766     prog_main = tcc_get_symbol_err(s1, "main");
1767
1768     if (s1->do_debug) {
1769 #ifdef CONFIG_TCC_BACKTRACE
1770         struct sigaction sigact;
1771         /* install TCC signal handlers to print debug info on fatal
1772            runtime errors */
1773         sigact.sa_flags = SA_SIGINFO | SA_RESETHAND;
1774         sigact.sa_sigaction = sig_error;
1775         sigemptyset(&sigact.sa_mask);
1776         sigaction(SIGFPE, &sigact, NULL);
1777         sigaction(SIGILL, &sigact, NULL);
1778         sigaction(SIGSEGV, &sigact, NULL);
1779         sigaction(SIGBUS, &sigact, NULL);
1780         sigaction(SIGABRT, &sigact, NULL);
1781 #else
1782         error("debug mode not available");
1783 #endif
1784     }
1785
1786 #ifdef CONFIG_TCC_BCHECK
1787     if (s1->do_bounds_check) {
1788         void (*bound_init)(void);
1789         void (*bound_exit)(void);
1790         /* set error function */
1791         rt_bound_error_msg = tcc_get_symbol_err(s1, "__bound_error_msg");
1792         rt_prog_main = (unsigned long)prog_main;
1793         /* XXX: use .init section so that it also work in binary ? */
1794         bound_init = tcc_get_symbol_err(s1, "__bound_init");
1795         bound_exit = tcc_get_symbol_err(s1, "__bound_exit");
1796         bound_init();
1797         ret = (*prog_main)(argc, argv);
1798         bound_exit();
1799     } else
1800 #endif
1801     ret = (*prog_main)(argc, argv);
1802     tcc_free(ptr);
1803     return ret;
1804 }
1805
1806 void tcc_memstats(void)
1807 {
1808 #ifdef MEM_DEBUG
1809     printf("memory in use: %d\n", mem_cur_size);
1810 #endif
1811 }
1812
1813 static void tcc_cleanup(void)
1814 {
1815     int i, n;
1816
1817     if (NULL == tcc_state)
1818         return;
1819     tcc_state = NULL;
1820
1821     /* free -D defines */
1822     free_defines(NULL);
1823
1824     /* free tokens */
1825     n = tok_ident - TOK_IDENT;
1826     for(i = 0; i < n; i++)
1827         tcc_free(table_ident[i]);
1828     tcc_free(table_ident);
1829
1830     /* free sym_pools */
1831     dynarray_reset(&sym_pools, &nb_sym_pools);
1832     /* string buffer */
1833     cstr_free(&tokcstr);
1834     /* reset symbol stack */
1835     sym_free_first = NULL;
1836     /* cleanup from error/setjmp */
1837     macro_ptr = NULL;
1838 }
1839
1840 TCCState *tcc_new(void)
1841 {
1842     TCCState *s;
1843     char buffer[100];
1844     int a,b,c;
1845
1846     tcc_cleanup();
1847
1848     s = tcc_mallocz(sizeof(TCCState));
1849     if (!s)
1850         return NULL;
1851     tcc_state = s;
1852 #ifdef _WIN32
1853     tcc_set_lib_path_w32(s);
1854 #else
1855     tcc_set_lib_path(s, CONFIG_TCCDIR);
1856 #endif
1857     s->output_type = TCC_OUTPUT_MEMORY;
1858     preprocess_new();
1859
1860     /* we add dummy defines for some special macros to speed up tests
1861        and to have working defined() */
1862     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
1863     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
1864     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
1865     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
1866
1867     /* standard defines */
1868     tcc_define_symbol(s, "__STDC__", NULL);
1869     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
1870 #if defined(TCC_TARGET_I386)
1871     tcc_define_symbol(s, "__i386__", NULL);
1872 #endif
1873 #if defined(TCC_TARGET_X86_64)
1874     tcc_define_symbol(s, "__x86_64__", NULL);
1875 #endif
1876 #if defined(TCC_TARGET_ARM)
1877     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
1878     tcc_define_symbol(s, "__arm_elf__", NULL);
1879     tcc_define_symbol(s, "__arm_elf", NULL);
1880     tcc_define_symbol(s, "arm_elf", NULL);
1881     tcc_define_symbol(s, "__arm__", NULL);
1882     tcc_define_symbol(s, "__arm", NULL);
1883     tcc_define_symbol(s, "arm", NULL);
1884     tcc_define_symbol(s, "__APCS_32__", NULL);
1885 #endif
1886 #ifdef TCC_TARGET_PE
1887     tcc_define_symbol(s, "_WIN32", NULL);
1888 #ifdef TCC_TARGET_X86_64
1889     tcc_define_symbol(s, "_WIN64", NULL);
1890 #endif
1891 #else
1892     tcc_define_symbol(s, "__unix__", NULL);
1893     tcc_define_symbol(s, "__unix", NULL);
1894 #if defined(__linux)
1895     tcc_define_symbol(s, "__linux__", NULL);
1896     tcc_define_symbol(s, "__linux", NULL);
1897 #endif
1898 #endif
1899     /* tiny C specific defines */
1900     sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
1901     sprintf(buffer, "%d", a*10000 + b*100 + c);
1902     tcc_define_symbol(s, "__TINYC__", buffer);
1903
1904     /* tiny C & gcc defines */
1905     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
1906     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
1907 #ifdef TCC_TARGET_PE
1908     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
1909 #else
1910     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
1911 #endif
1912
1913 #ifndef TCC_TARGET_PE
1914     /* default library paths */
1915     tcc_add_library_path(s, CONFIG_SYSROOT "/usr/local/lib");
1916     tcc_add_library_path(s, CONFIG_SYSROOT "/usr/lib");
1917     tcc_add_library_path(s, CONFIG_SYSROOT "/lib");
1918 #endif
1919
1920     /* no section zero */
1921     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
1922
1923     /* create standard sections */
1924     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
1925     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
1926     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
1927
1928     /* symbols are always generated for linking stage */
1929     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
1930                                 ".strtab",
1931                                 ".hashtab", SHF_PRIVATE);
1932     strtab_section = symtab_section->link;
1933
1934     /* private symbol table for dynamic symbols */
1935     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
1936                                       ".dynstrtab",
1937                                       ".dynhashtab", SHF_PRIVATE);
1938     s->alacarte_link = 1;
1939
1940 #ifdef CHAR_IS_UNSIGNED
1941     s->char_is_unsigned = 1;
1942 #endif
1943 #if defined(TCC_TARGET_PE) && 0
1944     /* XXX: currently the PE linker is not ready to support that */
1945     s->leading_underscore = 1;
1946 #endif
1947
1948     if (s->section_align == 0)
1949         s->section_align = ELF_PAGE_SIZE;
1950
1951 #ifdef TCC_TARGET_I386
1952     s->seg_size = 32;
1953 #endif
1954     return s;
1955 }
1956
1957 void tcc_delete(TCCState *s1)
1958 {
1959     int i;
1960
1961     tcc_cleanup();
1962
1963     /* free all sections */
1964     for(i = 1; i < s1->nb_sections; i++)
1965         free_section(s1->sections[i]);
1966     dynarray_reset(&s1->sections, &s1->nb_sections);
1967
1968     for(i = 0; i < s1->nb_priv_sections; i++)
1969         free_section(s1->priv_sections[i]);
1970     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1971
1972     /* free any loaded DLLs */
1973     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1974         DLLReference *ref = s1->loaded_dlls[i];
1975         if ( ref->handle )
1976             dlclose(ref->handle);
1977     }
1978
1979     /* free loaded dlls array */
1980     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1981
1982     /* free library paths */
1983     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1984
1985     /* free include paths */
1986     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1987     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1988     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1989
1990     tcc_free(s1->tcc_lib_path);
1991     tcc_free(s1);
1992 }
1993
1994 int tcc_add_include_path(TCCState *s1, const char *pathname)
1995 {
1996     char *pathname1;
1997
1998     pathname1 = tcc_strdup(pathname);
1999     dynarray_add((void ***)&s1->include_paths, &s1->nb_include_paths, pathname1);
2000     return 0;
2001 }
2002
2003 int tcc_add_sysinclude_path(TCCState *s1, const char *pathname)
2004 {
2005     char *pathname1;
2006
2007     pathname1 = tcc_strdup(pathname);
2008     dynarray_add((void ***)&s1->sysinclude_paths, &s1->nb_sysinclude_paths, pathname1);
2009     return 0;
2010 }
2011
2012 static int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
2013 {
2014     const char *ext;
2015     ElfW(Ehdr) ehdr;
2016     int fd, ret, size;
2017     BufferedFile *saved_file;
2018
2019     ret = -1;
2020
2021     /* find source file type with extension */
2022     ext = tcc_fileextension(filename);
2023     if (ext[0])
2024         ext++;
2025
2026     /* open the file */
2027     saved_file = file;
2028     file = tcc_open(s1, filename);
2029     if (!file) {
2030         if (flags & AFF_PRINT_ERROR)
2031             error_noabort("file '%s' not found", filename);
2032         goto the_end;
2033     }
2034
2035     if (flags & AFF_PREPROCESS) {
2036         ret = tcc_preprocess(s1);
2037         goto the_end;
2038     }
2039
2040     if (!ext[0] || !PATHCMP(ext, "c")) {
2041         /* C file assumed */
2042         ret = tcc_compile(s1);
2043         goto the_end;
2044     }
2045
2046 #ifdef CONFIG_TCC_ASM
2047     if (!strcmp(ext, "S")) {
2048         /* preprocessed assembler */
2049         ret = tcc_assemble(s1, 1);
2050         goto the_end;
2051     }
2052
2053     if (!strcmp(ext, "s")) {
2054         /* non preprocessed assembler */
2055         ret = tcc_assemble(s1, 0);
2056         goto the_end;
2057     }
2058 #endif
2059
2060     fd = file->fd;
2061     /* assume executable format: auto guess file type */
2062     size = read(fd, &ehdr, sizeof(ehdr));
2063     lseek(fd, 0, SEEK_SET);
2064     if (size <= 0) {
2065         error_noabort("could not read header");
2066         goto the_end;
2067     }
2068
2069     if (size == sizeof(ehdr) &&
2070         ehdr.e_ident[0] == ELFMAG0 &&
2071         ehdr.e_ident[1] == ELFMAG1 &&
2072         ehdr.e_ident[2] == ELFMAG2 &&
2073         ehdr.e_ident[3] == ELFMAG3) {
2074
2075         /* do not display line number if error */
2076         file->line_num = 0;
2077         if (ehdr.e_type == ET_REL) {
2078             ret = tcc_load_object_file(s1, fd, 0);
2079             goto the_end;
2080
2081         }
2082 #ifndef TCC_TARGET_PE
2083         if (ehdr.e_type == ET_DYN) {
2084             if (s1->output_type == TCC_OUTPUT_MEMORY) {
2085                 void *h;
2086                 h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
2087                 if (h)
2088                     ret = 0;
2089             } else {
2090                 ret = tcc_load_dll(s1, fd, filename,
2091                                    (flags & AFF_REFERENCED_DLL) != 0);
2092             }
2093             goto the_end;
2094         }
2095 #endif
2096         error_noabort("unrecognized ELF file");
2097         goto the_end;
2098     }
2099
2100     if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
2101         file->line_num = 0; /* do not display line number if error */
2102         ret = tcc_load_archive(s1, fd);
2103         goto the_end;
2104     }
2105
2106 #ifdef TCC_TARGET_COFF
2107     if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
2108         ret = tcc_load_coff(s1, fd);
2109         goto the_end;
2110     }
2111 #endif
2112
2113 #ifdef TCC_TARGET_PE
2114     ret = pe_load_file(s1, filename, fd);
2115 #else
2116     /* as GNU ld, consider it is an ld script if not recognized */
2117     ret = tcc_load_ldscript(s1);
2118 #endif
2119     if (ret < 0)
2120         error_noabort("unrecognized file type");
2121
2122 the_end:
2123     if (file)
2124         tcc_close(file);
2125     file = saved_file;
2126     return ret;
2127 }
2128
2129 int tcc_add_file(TCCState *s, const char *filename)
2130 {
2131     if (s->output_type == TCC_OUTPUT_PREPROCESS)
2132         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS);
2133     else
2134         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR);
2135 }
2136
2137 int tcc_add_library_path(TCCState *s, const char *pathname)
2138 {
2139     char *pathname1;
2140
2141     pathname1 = tcc_strdup(pathname);
2142     dynarray_add((void ***)&s->library_paths, &s->nb_library_paths, pathname1);
2143     return 0;
2144 }
2145
2146 /* find and load a dll. Return non zero if not found */
2147 /* XXX: add '-rpath' option support ? */
2148 static int tcc_add_dll(TCCState *s, const char *filename, int flags)
2149 {
2150     char buf[1024];
2151     int i;
2152
2153     for(i = 0; i < s->nb_library_paths; i++) {
2154         snprintf(buf, sizeof(buf), "%s/%s",
2155                  s->library_paths[i], filename);
2156         if (tcc_add_file_internal(s, buf, flags) == 0)
2157             return 0;
2158     }
2159     return -1;
2160 }
2161
2162 /* the library name is the same as the argument of the '-l' option */
2163 int tcc_add_library(TCCState *s, const char *libraryname)
2164 {
2165     char buf[1024];
2166     int i;
2167
2168     /* first we look for the dynamic library if not static linking */
2169     if (!s->static_link) {
2170 #ifdef TCC_TARGET_PE
2171         if (pe_add_dll(s, libraryname) == 0)
2172             return 0;
2173 #else
2174         snprintf(buf, sizeof(buf), "lib%s.so", libraryname);
2175         if (tcc_add_dll(s, buf, 0) == 0)
2176             return 0;
2177 #endif
2178     }
2179     /* then we look for the static library */
2180     for(i = 0; i < s->nb_library_paths; i++) {
2181         snprintf(buf, sizeof(buf), "%s/lib%s.a",
2182                  s->library_paths[i], libraryname);
2183         if (tcc_add_file_internal(s, buf, 0) == 0)
2184             return 0;
2185     }
2186     return -1;
2187 }
2188
2189 int tcc_add_symbol(TCCState *s, const char *name, void *val)
2190 {
2191     add_elf_sym(symtab_section, (uplong)val, 0,
2192                 ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
2193                 SHN_ABS, name);
2194     return 0;
2195 }
2196
2197 int tcc_set_output_type(TCCState *s, int output_type)
2198 {
2199     char buf[1024];
2200
2201     s->output_type = output_type;
2202
2203     if (!s->nostdinc) {
2204         /* default include paths */
2205         /* XXX: reverse order needed if -isystem support */
2206 #ifndef TCC_TARGET_PE
2207         tcc_add_sysinclude_path(s, CONFIG_SYSROOT "/usr/local/include");
2208         tcc_add_sysinclude_path(s, CONFIG_SYSROOT "/usr/include");
2209 #endif
2210         snprintf(buf, sizeof(buf), "%s/include", s->tcc_lib_path);
2211         tcc_add_sysinclude_path(s, buf);
2212 #ifdef TCC_TARGET_PE
2213         snprintf(buf, sizeof(buf), "%s/include/winapi", s->tcc_lib_path);
2214         tcc_add_sysinclude_path(s, buf);
2215 #endif
2216     }
2217
2218     /* if bound checking, then add corresponding sections */
2219 #ifdef CONFIG_TCC_BCHECK
2220     if (s->do_bounds_check) {
2221         /* define symbol */
2222         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
2223         /* create bounds sections */
2224         bounds_section = new_section(s, ".bounds",
2225                                      SHT_PROGBITS, SHF_ALLOC);
2226         lbounds_section = new_section(s, ".lbounds",
2227                                       SHT_PROGBITS, SHF_ALLOC);
2228     }
2229 #endif
2230
2231     if (s->char_is_unsigned) {
2232         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
2233     }
2234
2235     /* add debug sections */
2236     if (s->do_debug) {
2237         /* stab symbols */
2238         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
2239         stab_section->sh_entsize = sizeof(Stab_Sym);
2240         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
2241         put_elf_str(stabstr_section, "");
2242         stab_section->link = stabstr_section;
2243         /* put first entry */
2244         put_stabs("", 0, 0, 0, 0);
2245     }
2246
2247     /* add libc crt1/crti objects */
2248 #ifndef TCC_TARGET_PE
2249     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
2250         !s->nostdlib) {
2251         if (output_type != TCC_OUTPUT_DLL)
2252             tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crt1.o");
2253         tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crti.o");
2254     }
2255 #endif
2256
2257 #ifdef TCC_TARGET_PE
2258     snprintf(buf, sizeof(buf), "%s/lib", s->tcc_lib_path);
2259     tcc_add_library_path(s, buf);
2260 #ifdef _WIN32
2261     if (GetSystemDirectory(buf, sizeof buf))
2262         tcc_add_library_path(s, buf);
2263 #endif
2264 #endif
2265
2266     return 0;
2267 }
2268
2269 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
2270 #define FD_INVERT 0x0002 /* invert value before storing */
2271
2272 typedef struct FlagDef {
2273     uint16_t offset;
2274     uint16_t flags;
2275     const char *name;
2276 } FlagDef;
2277
2278 static const FlagDef warning_defs[] = {
2279     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
2280     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
2281     { offsetof(TCCState, warn_error), 0, "error" },
2282     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
2283       "implicit-function-declaration" },
2284 };
2285
2286 static int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
2287                     const char *name, int value)
2288 {
2289     int i;
2290     const FlagDef *p;
2291     const char *r;
2292
2293     r = name;
2294     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
2295         r += 3;
2296         value = !value;
2297     }
2298     for(i = 0, p = flags; i < nb_flags; i++, p++) {
2299         if (!strcmp(r, p->name))
2300             goto found;
2301     }
2302     return -1;
2303  found:
2304     if (p->flags & FD_INVERT)
2305         value = !value;
2306     *(int *)((uint8_t *)s + p->offset) = value;
2307     return 0;
2308 }
2309
2310
2311 /* set/reset a warning */
2312 int tcc_set_warning(TCCState *s, const char *warning_name, int value)
2313 {
2314     int i;
2315     const FlagDef *p;
2316
2317     if (!strcmp(warning_name, "all")) {
2318         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
2319             if (p->flags & WD_ALL)
2320                 *(int *)((uint8_t *)s + p->offset) = 1;
2321         }
2322         return 0;
2323     } else {
2324         return set_flag(s, warning_defs, countof(warning_defs),
2325                         warning_name, value);
2326     }
2327 }
2328
2329 static const FlagDef flag_defs[] = {
2330     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
2331     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
2332     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
2333     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
2334 };
2335
2336 /* set/reset a flag */
2337 int tcc_set_flag(TCCState *s, const char *flag_name, int value)
2338 {
2339     return set_flag(s, flag_defs, countof(flag_defs),
2340                     flag_name, value);
2341 }
2342
2343 /* set CONFIG_TCCDIR at runtime */
2344 void tcc_set_lib_path(TCCState *s, const char *path)
2345 {
2346     tcc_free(s->tcc_lib_path);
2347     s->tcc_lib_path = tcc_strdup(path);
2348 }
2349
2350 void tcc_print_stats(TCCState *s, int64_t total_time)
2351 {
2352     double tt;
2353     tt = (double)total_time / 1000000.0;
2354     if (tt < 0.001)
2355         tt = 0.001;
2356     if (total_bytes < 1)
2357         total_bytes = 1;
2358     printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
2359            tok_ident - TOK_IDENT, total_lines, total_bytes,
2360            tt, (int)(total_lines / tt),
2361            total_bytes / tt / 1000000.0);
2362 }