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, unsigned long 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 void *resolve_sym(TCCState *s1, const char *sym, int type);
 216 int pe_load_def_file(struct TCCState *s1, int fd);
 217 int pe_test_res_file(void *v, int size);
 218 int pe_load_res_file(struct TCCState *s1, int fd);
 219 void pe_add_runtime(struct TCCState *s1);
 220 void pe_guess_outfile(char *objfilename, int output_type);
 221 int pe_output_file(struct TCCState *s1, const char *filename);
 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
 284 static inline int isid(int c)
 285 {
 286     return (c >= 'a' && c <= 'z')
 287         || (c >= 'A' && c <= 'Z')
 288         || c == '_';
 289 }
 290
 291 static inline int isnum(int c)
 292 {
 293     return c >= '0' && c <= '9';
 294 }
 295
 296 static inline int isoct(int c)
 297 {
 298     return c >= '0' && c <= '7';
 299 }
 300
 301 static inline int toup(int c)
 302 {
 303     if (c >= 'a' && c <= 'z')
 304         return c - 'a' + 'A';
 305     else
 306         return c;
 307 }
 308
 309 void *resolve_sym(TCCState *s1, const char *sym, int type);
 310
 311 /********************************************************/
 312
 313 #ifdef TCC_TARGET_I386
 314 #include "i386-gen.c"
 315 #endif
 316
 317 #ifdef TCC_TARGET_ARM
 318 #include "arm-gen.c"
 319 #endif
 320
 321 #ifdef TCC_TARGET_C67
 322 #include "c67-gen.c"
 323 #endif
 324
 325 #ifdef TCC_TARGET_X86_64
 326 #include "x86_64-gen.c"
 327 #endif
 328
 329 #include "tccpp.c"
 330 #include "tccgen.c"
 331
 332 #ifdef CONFIG_TCC_ASM
 333 #ifdef TCC_TARGET_I386
 334 #include "i386-asm.c"
 335 #endif
 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 CONFIG_TCC_STATIC
 360
 361 #define RTLD_LAZY       0x001
 362 #define RTLD_NOW        0x002
 363 #define RTLD_GLOBAL     0x100
 364 #define RTLD_DEFAULT    NULL
 365
 366 /* dummy function for profiling */
 367 void *dlopen(const char *filename, int flag)
 368 {
 369     return NULL;
 370 }
 371
 372 void dlclose(void *p)
 373 {
 374 }
 375
 376 const char *dlerror(void)
 377 {
 378     return "error";
 379 }
 380
 381 typedef struct TCCSyms {
 382     char *str;
 383     void *ptr;
 384 } TCCSyms;
 385
 386 #define TCCSYM(a) { #a, &a, },
 387
 388 /* add the symbol you want here if no dynamic linking is done */
 389 static TCCSyms tcc_syms[] = {
 390 #if !defined(CONFIG_TCCBOOT)
 391     TCCSYM(printf)
 392     TCCSYM(fprintf)
 393     TCCSYM(fopen)
 394     TCCSYM(fclose)
 395 #endif
 396     { NULL, NULL },
 397 };
 398
 399 void *resolve_sym(TCCState *s1, const char *symbol, int type)
 400 {
 401     TCCSyms *p;
 402     p = tcc_syms;
 403     while (p->str != NULL) {
 404         if (!strcmp(p->str, symbol))
 405             return p->ptr;
 406         p++;
 407     }
 408     return NULL;
 409 }
 410
 411 #elif !defined(_WIN32)
 412
 413 #include <dlfcn.h>
 414
 415 void *resolve_sym(TCCState *s1, const char *sym, int type)
 416 {
 417     return dlsym(RTLD_DEFAULT, sym);
 418 }
 419
 420 #endif
 421
 422 /********************************************************/
 423
 424 /* we use our own 'finite' function to avoid potential problems with
 425    non standard math libs */
 426 /* XXX: endianness dependent */
 427 int ieee_finite(double d)
 428 {
 429     int *p = (int *)&d;
 430     return ((unsigned)((p[1] | 0x800fffff) + 1)) >> 31;
 431 }
 432
 433 /* copy a string and truncate it. */
 434 char *pstrcpy(char *buf, int buf_size, const char *s)
 435 {
 436     char *q, *q_end;
 437     int c;
 438
 439     if (buf_size > 0) {
 440         q = buf;
 441         q_end = buf + buf_size - 1;
 442         while (q < q_end) {
 443             c = *s++;
 444             if (c == '\0')
 445                 break;
 446             *q++ = c;
 447         }
 448         *q = '\0';
 449     }
 450     return buf;
 451 }
 452
 453 /* strcat and truncate. */
 454 char *pstrcat(char *buf, int buf_size, const char *s)
 455 {
 456     int len;
 457     len = strlen(buf);
 458     if (len < buf_size)
 459         pstrcpy(buf + len, buf_size - len, s);
 460     return buf;
 461 }
 462
 463 /* extract the basename of a file */
 464 char *tcc_basename(const char *name)
 465 {
 466     char *p = strchr(name, 0);
 467     while (p > name && !IS_PATHSEP(p[-1]))
 468         --p;
 469     return p;
 470 }
 471
 472 char *tcc_fileextension (const char *name)
 473 {
 474     char *b = tcc_basename(name);
 475     char *e = strrchr(b, '.');
 476     return e ? e : strchr(b, 0);
 477 }
 478
 479 #ifdef _WIN32
 480 char *normalize_slashes(char *path)
 481 {
 482     char *p;
 483     for (p = path; *p; ++p)
 484         if (*p == '\\')
 485             *p = '/';
 486     return path;
 487 }
 488
 489 void tcc_set_lib_path_w32(TCCState *s)
 490 {
 491     /* on win32, we suppose the lib and includes are at the location
 492        of 'tcc.exe' */
 493     char path[1024], *p;
 494     GetModuleFileNameA(NULL, path, sizeof path);
 495     p = tcc_basename(normalize_slashes(strlwr(path)));
 496     if (p - 5 > path && 0 == strncmp(p - 5, "/bin/", 5))
 497         p -= 5;
 498     else if (p > path)
 499         p--;
 500     *p = 0;
 501     tcc_set_lib_path(s, path);
 502 }
 503 #endif
 504
 505 void set_pages_executable(void *ptr, unsigned long length)
 506 {
 507 #ifdef _WIN32
 508     unsigned long old_protect;
 509     VirtualProtect(ptr, length, PAGE_EXECUTE_READWRITE, &old_protect);
 510 #else
 511     unsigned long start, end;
 512     start = (unsigned long)ptr & ~(PAGESIZE - 1);
 513     end = (unsigned long)ptr + length;
 514     end = (end + PAGESIZE - 1) & ~(PAGESIZE - 1);
 515     mprotect((void *)start, end - start, PROT_READ | PROT_WRITE | PROT_EXEC);
 516 #endif
 517 }
 518
 519 /* memory management */
 520 #ifdef MEM_DEBUG
 521 int mem_cur_size;
 522 int mem_max_size;
 523 unsigned malloc_usable_size(void*);
 524 #endif
 525
 526 void tcc_free(void *ptr)
 527 {
 528 #ifdef MEM_DEBUG
 529     mem_cur_size -= malloc_usable_size(ptr);
 530 #endif
 531     free(ptr);
 532 }
 533
 534 void *tcc_malloc(unsigned long size)
 535 {
 536     void *ptr;
 537     ptr = malloc(size);
 538     if (!ptr && size)
 539         error("memory full");
 540 #ifdef MEM_DEBUG
 541     mem_cur_size += malloc_usable_size(ptr);
 542     if (mem_cur_size > mem_max_size)
 543         mem_max_size = mem_cur_size;
 544 #endif
 545     return ptr;
 546 }
 547
 548 void *tcc_mallocz(unsigned long size)
 549 {
 550     void *ptr;
 551     ptr = tcc_malloc(size);
 552     memset(ptr, 0, size);
 553     return ptr;
 554 }
 555
 556 void *tcc_realloc(void *ptr, unsigned long size)
 557 {
 558     void *ptr1;
 559 #ifdef MEM_DEBUG
 560     mem_cur_size -= malloc_usable_size(ptr);
 561 #endif
 562     ptr1 = realloc(ptr, size);
 563 #ifdef MEM_DEBUG
 564     /* NOTE: count not correct if alloc error, but not critical */
 565     mem_cur_size += malloc_usable_size(ptr1);
 566     if (mem_cur_size > mem_max_size)
 567         mem_max_size = mem_cur_size;
 568 #endif
 569     return ptr1;
 570 }
 571
 572 char *tcc_strdup(const char *str)
 573 {
 574     char *ptr;
 575     ptr = tcc_malloc(strlen(str) + 1);
 576     strcpy(ptr, str);
 577     return ptr;
 578 }
 579
 580 #define free(p) use_tcc_free(p)
 581 #define malloc(s) use_tcc_malloc(s)
 582 #define realloc(p, s) use_tcc_realloc(p, s)
 583
 584 void dynarray_add(void ***ptab, int *nb_ptr, void *data)
 585 {
 586     int nb, nb_alloc;
 587     void **pp;
 588
 589     nb = *nb_ptr;
 590     pp = *ptab;
 591     /* every power of two we double array size */
 592     if ((nb & (nb - 1)) == 0) {
 593         if (!nb)
 594             nb_alloc = 1;
 595         else
 596             nb_alloc = nb * 2;
 597         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 598         if (!pp)
 599             error("memory full");
 600         *ptab = pp;
 601     }
 602     pp[nb++] = data;
 603     *nb_ptr = nb;
 604 }
 605
 606 void dynarray_reset(void *pp, int *n)
 607 {
 608     void **p;
 609     for (p = *(void***)pp; *n; ++p, --*n)
 610         if (*p)
 611             tcc_free(*p);
 612     tcc_free(*(void**)pp);
 613     *(void**)pp = NULL;
 614 }
 615
 616 /* symbol allocator */
 617 static Sym *__sym_malloc(void)
 618 {
 619     Sym *sym_pool, *sym, *last_sym;
 620     int i;
 621
 622     sym_pool = tcc_malloc(SYM_POOL_NB * sizeof(Sym));
 623     dynarray_add(&sym_pools, &nb_sym_pools, sym_pool);
 624
 625     last_sym = sym_free_first;
 626     sym = sym_pool;
 627     for(i = 0; i < SYM_POOL_NB; i++) {
 628         sym->next = last_sym;
 629         last_sym = sym;
 630         sym++;
 631     }
 632     sym_free_first = last_sym;
 633     return last_sym;
 634 }
 635
 636 static inline Sym *sym_malloc(void)
 637 {
 638     Sym *sym;
 639     sym = sym_free_first;
 640     if (!sym)
 641         sym = __sym_malloc();
 642     sym_free_first = sym->next;
 643     return sym;
 644 }
 645
 646 static inline void sym_free(Sym *sym)
 647 {
 648     sym->next = sym_free_first;
 649     sym_free_first = sym;
 650 }
 651
 652 Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags)
 653 {
 654     Section *sec;
 655
 656     sec = tcc_mallocz(sizeof(Section) + strlen(name));
 657     strcpy(sec->name, name);
 658     sec->sh_type = sh_type;
 659     sec->sh_flags = sh_flags;
 660     switch(sh_type) {
 661     case SHT_HASH:
 662     case SHT_REL:
 663     case SHT_RELA:
 664     case SHT_DYNSYM:
 665     case SHT_SYMTAB:
 666     case SHT_DYNAMIC:
 667         sec->sh_addralign = 4;
 668         break;
 669     case SHT_STRTAB:
 670         sec->sh_addralign = 1;
 671         break;
 672     default:
 673         sec->sh_addralign = 32; /* default conservative alignment */
 674         break;
 675     }
 676
 677     if (sh_flags & SHF_PRIVATE) {
 678         dynarray_add((void ***)&s1->priv_sections, &s1->nb_priv_sections, sec);
 679     } else {
 680         sec->sh_num = s1->nb_sections;
 681         dynarray_add((void ***)&s1->sections, &s1->nb_sections, sec);
 682     }
 683
 684     return sec;
 685 }
 686
 687 static void free_section(Section *s)
 688 {
 689     tcc_free(s->data);
 690 }
 691
 692 /* realloc section and set its content to zero */
 693 static void section_realloc(Section *sec, unsigned long new_size)
 694 {
 695     unsigned long size;
 696     unsigned char *data;
 697
 698     size = sec->data_allocated;
 699     if (size == 0)
 700         size = 1;
 701     while (size < new_size)
 702         size = size * 2;
 703     data = tcc_realloc(sec->data, size);
 704     if (!data)
 705         error("memory full");
 706     memset(data + sec->data_allocated, 0, size - sec->data_allocated);
 707     sec->data = data;
 708     sec->data_allocated = size;
 709 }
 710
 711 /* reserve at least 'size' bytes in section 'sec' from
 712    sec->data_offset. */
 713 static void *section_ptr_add(Section *sec, unsigned long size)
 714 {
 715     unsigned long offset, offset1;
 716
 717     offset = sec->data_offset;
 718     offset1 = offset + size;
 719     if (offset1 > sec->data_allocated)
 720         section_realloc(sec, offset1);
 721     sec->data_offset = offset1;
 722     return sec->data + offset;
 723 }
 724
 725 /* return a reference to a section, and create it if it does not
 726    exists */
 727 Section *find_section(TCCState *s1, const char *name)
 728 {
 729     Section *sec;
 730     int i;
 731     for(i = 1; i < s1->nb_sections; i++) {
 732         sec = s1->sections[i];
 733         if (!strcmp(name, sec->name))
 734             return sec;
 735     }
 736     /* sections are created as PROGBITS */
 737     return new_section(s1, name, SHT_PROGBITS, SHF_ALLOC);
 738 }
 739
 740 /* update sym->c so that it points to an external symbol in section
 741    'section' with value 'value' */
 742 static void put_extern_sym2(Sym *sym, Section *section,
 743                             unsigned long value, unsigned long size,
 744                             int can_add_underscore)
 745 {
 746     int sym_type, sym_bind, sh_num, info, other, attr;
 747     ElfW(Sym) *esym;
 748     const char *name;
 749     char buf1[256];
 750
 751     if (section == NULL)
 752         sh_num = SHN_UNDEF;
 753     else if (section == SECTION_ABS)
 754         sh_num = SHN_ABS;
 755     else
 756         sh_num = section->sh_num;
 757
 758     other = attr = 0;
 759
 760     if ((sym->type.t & VT_BTYPE) == VT_FUNC) {
 761         sym_type = STT_FUNC;
 762 #ifdef TCC_TARGET_PE
 763         if (sym->type.ref)
 764             attr = sym->type.ref->r;
 765         if (FUNC_EXPORT(attr))
 766             other |= 1;
 767         if (FUNC_CALL(attr) == FUNC_STDCALL)
 768             other |= 2;
 769 #endif
 770     } else {
 771         sym_type = STT_OBJECT;
 772     }
 773
 774     if (sym->type.t & VT_STATIC)
 775         sym_bind = STB_LOCAL;
 776     else
 777         sym_bind = STB_GLOBAL;
 778
 779     if (!sym->c) {
 780         name = get_tok_str(sym->v, NULL);
 781 #ifdef CONFIG_TCC_BCHECK
 782         if (tcc_state->do_bounds_check) {
 783             char buf[32];
 784
 785             /* XXX: avoid doing that for statics ? */
 786             /* if bound checking is activated, we change some function
 787                names by adding the "__bound" prefix */
 788             switch(sym->v) {
 789 #if 0
 790             /* XXX: we rely only on malloc hooks */
 791             case TOK_malloc:
 792             case TOK_free:
 793             case TOK_realloc:
 794             case TOK_memalign:
 795             case TOK_calloc:
 796 #endif
 797             case TOK_memcpy:
 798             case TOK_memmove:
 799             case TOK_memset:
 800             case TOK_strlen:
 801             case TOK_strcpy:
 802             case TOK_alloca:
 803                 strcpy(buf, "__bound_");
 804                 strcat(buf, name);
 805                 name = buf;
 806                 break;
 807             }
 808         }
 809 #endif
 810
 811 #ifdef TCC_TARGET_PE
 812         if ((other & 2) && can_add_underscore) {
 813             sprintf(buf1, "_%s@%d", name, FUNC_ARGS(attr));
 814             name = buf1;
 815         } else
 816 #endif
 817         if (tcc_state->leading_underscore && can_add_underscore) {
 818             buf1[0] = '_';
 819             pstrcpy(buf1 + 1, sizeof(buf1) - 1, name);
 820             name = buf1;
 821         }
 822         info = ELFW(ST_INFO)(sym_bind, sym_type);
 823         sym->c = add_elf_sym(symtab_section, value, size, info, other, sh_num, name);
 824     } else {
 825         esym = &((ElfW(Sym) *)symtab_section->data)[sym->c];
 826         esym->st_value = value;
 827         esym->st_size = size;
 828         esym->st_shndx = sh_num;
 829         esym->st_other |= other;
 830     }
 831 }
 832
 833 static void put_extern_sym(Sym *sym, Section *section,
 834                            unsigned long value, unsigned long size)
 835 {
 836     put_extern_sym2(sym, section, value, size, 1);
 837 }
 838
 839 /* add a new relocation entry to symbol 'sym' in section 's' */
 840 static void greloc(Section *s, Sym *sym, unsigned long offset, int type)
 841 {
 842     if (!sym->c)
 843         put_extern_sym(sym, NULL, 0, 0);
 844     /* now we can add ELF relocation info */
 845     put_elf_reloc(symtab_section, s, offset, type, sym->c);
 846 }
 847
 848 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 849 {
 850     int len;
 851     len = strlen(buf);
 852     vsnprintf(buf + len, buf_size - len, fmt, ap);
 853 }
 854
 855 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 856 {
 857     va_list ap;
 858     va_start(ap, fmt);
 859     strcat_vprintf(buf, buf_size, fmt, ap);
 860     va_end(ap);
 861 }
 862
 863 void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 864 {
 865     char buf[2048];
 866     BufferedFile **f;
 867
 868     buf[0] = '\0';
 869     if (file) {
 870         for(f = s1->include_stack; f < s1->include_stack_ptr; f++)
 871             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 872                           (*f)->filename, (*f)->line_num);
 873         if (file->line_num > 0) {
 874             strcat_printf(buf, sizeof(buf),
 875                           "%s:%d: ", file->filename, file->line_num);
 876         } else {
 877             strcat_printf(buf, sizeof(buf),
 878                           "%s: ", file->filename);
 879         }
 880     } else {
 881         strcat_printf(buf, sizeof(buf),
 882                       "tcc: ");
 883     }
 884     if (is_warning)
 885         strcat_printf(buf, sizeof(buf), "warning: ");
 886     else
 887         strcat_printf(buf, sizeof(buf), "error: ");
 888     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 889
 890     if (!s1->error_func) {
 891         /* default case: stderr */
 892         fprintf(stderr, "%s\n", buf);
 893     } else {
 894         s1->error_func(s1->error_opaque, buf);
 895     }
 896     if (!is_warning || s1->warn_error)
 897         s1->nb_errors++;
 898 }
 899
 900 void tcc_set_error_func(TCCState *s, void *error_opaque,
 901                         void (*error_func)(void *opaque, const char *msg))
 902 {
 903     s->error_opaque = error_opaque;
 904     s->error_func = error_func;
 905 }
 906
 907 /* error without aborting current compilation */
 908 void error_noabort(const char *fmt, ...)
 909 {
 910     TCCState *s1 = tcc_state;
 911     va_list ap;
 912
 913     va_start(ap, fmt);
 914     error1(s1, 0, fmt, ap);
 915     va_end(ap);
 916 }
 917
 918 void error(const char *fmt, ...)
 919 {
 920     TCCState *s1 = tcc_state;
 921     va_list ap;
 922
 923     va_start(ap, fmt);
 924     error1(s1, 0, fmt, ap);
 925     va_end(ap);
 926     /* better than nothing: in some cases, we accept to handle errors */
 927     if (s1->error_set_jmp_enabled) {
 928         longjmp(s1->error_jmp_buf, 1);
 929     } else {
 930         /* XXX: eliminate this someday */
 931         exit(1);
 932     }
 933 }
 934
 935 void expect(const char *msg)
 936 {
 937     error("%s expected", msg);
 938 }
 939
 940 void warning(const char *fmt, ...)
 941 {
 942     TCCState *s1 = tcc_state;
 943     va_list ap;
 944
 945     if (s1->warn_none)
 946         return;
 947
 948     va_start(ap, fmt);
 949     error1(s1, 1, fmt, ap);
 950     va_end(ap);
 951 }
 952
 953 void skip(int c)
 954 {
 955     if (tok != c)
 956         error("'%c' expected", c);
 957     next();
 958 }
 959
 960 static void test_lvalue(void)
 961 {
 962     if (!(vtop->r & VT_LVAL))
 963         expect("lvalue");
 964 }
 965
 966 /* CString handling */
 967
 968 static void cstr_realloc(CString *cstr, int new_size)
 969 {
 970     int size;
 971     void *data;
 972
 973     size = cstr->size_allocated;
 974     if (size == 0)
 975         size = 8; /* no need to allocate a too small first string */
 976     while (size < new_size)
 977         size = size * 2;
 978     data = tcc_realloc(cstr->data_allocated, size);
 979     if (!data)
 980         error("memory full");
 981     cstr->data_allocated = data;
 982     cstr->size_allocated = size;
 983     cstr->data = data;
 984 }
 985
 986 /* add a byte */
 987 static inline void cstr_ccat(CString *cstr, int ch)
 988 {
 989     int size;
 990     size = cstr->size + 1;
 991     if (size > cstr->size_allocated)
 992         cstr_realloc(cstr, size);
 993     ((unsigned char *)cstr->data)[size - 1] = ch;
 994     cstr->size = size;
 995 }
 996
 997 static void cstr_cat(CString *cstr, const char *str)
 998 {
 999     int c;
1000     for(;;) {
1001         c = *str;
1002         if (c == '\0')
1003             break;
1004         cstr_ccat(cstr, c);
1005         str++;
1006     }
1007 }
1008
1009 /* add a wide char */
1010 static void cstr_wccat(CString *cstr, int ch)
1011 {
1012     int size;
1013     size = cstr->size + sizeof(nwchar_t);
1014     if (size > cstr->size_allocated)
1015         cstr_realloc(cstr, size);
1016     *(nwchar_t *)(((unsigned char *)cstr->data) + size - sizeof(nwchar_t)) = ch;
1017     cstr->size = size;
1018 }
1019
1020 static void cstr_new(CString *cstr)
1021 {
1022     memset(cstr, 0, sizeof(CString));
1023 }
1024
1025 /* free string and reset it to NULL */
1026 static void cstr_free(CString *cstr)
1027 {
1028     tcc_free(cstr->data_allocated);
1029     cstr_new(cstr);
1030 }
1031
1032 #define cstr_reset(cstr) cstr_free(cstr)
1033
1034 /* XXX: unicode ? */
1035 static void add_char(CString *cstr, int c)
1036 {
1037     if (c == '\'' || c == '\"' || c == '\\') {
1038         /* XXX: could be more precise if char or string */
1039         cstr_ccat(cstr, '\\');
1040     }
1041     if (c >= 32 && c <= 126) {
1042         cstr_ccat(cstr, c);
1043     } else {
1044         cstr_ccat(cstr, '\\');
1045         if (c == '\n') {
1046             cstr_ccat(cstr, 'n');
1047         } else {
1048             cstr_ccat(cstr, '0' + ((c >> 6) & 7));
1049             cstr_ccat(cstr, '0' + ((c >> 3) & 7));
1050             cstr_ccat(cstr, '0' + (c & 7));
1051         }
1052     }
1053 }
1054
1055 /* push, without hashing */
1056 static Sym *sym_push2(Sym **ps, int v, int t, long c)
1057 {
1058     Sym *s;
1059     s = sym_malloc();
1060     s->v = v;
1061     s->type.t = t;
1062 #ifdef _WIN64
1063     s->d = NULL;
1064 #endif
1065     s->c = c;
1066     s->next = NULL;
1067     /* add in stack */
1068     s->prev = *ps;
1069     *ps = s;
1070     return s;
1071 }
1072
1073 /* find a symbol and return its associated structure. 's' is the top
1074    of the symbol stack */
1075 static Sym *sym_find2(Sym *s, int v)
1076 {
1077     while (s) {
1078         if (s->v == v)
1079             return s;
1080         s = s->prev;
1081     }
1082     return NULL;
1083 }
1084
1085 /* structure lookup */
1086 static inline Sym *struct_find(int v)
1087 {
1088     v -= TOK_IDENT;
1089     if ((unsigned)v >= (unsigned)(tok_ident - TOK_IDENT))
1090         return NULL;
1091     return table_ident[v]->sym_struct;
1092 }
1093
1094 /* find an identifier */
1095 static inline Sym *sym_find(int v)
1096 {
1097     v -= TOK_IDENT;
1098     if ((unsigned)v >= (unsigned)(tok_ident - TOK_IDENT))
1099         return NULL;
1100     return table_ident[v]->sym_identifier;
1101 }
1102
1103 /* push a given symbol on the symbol stack */
1104 static Sym *sym_push(int v, CType *type, int r, int c)
1105 {
1106     Sym *s, **ps;
1107     TokenSym *ts;
1108
1109     if (local_stack)
1110         ps = &local_stack;
1111     else
1112         ps = &global_stack;
1113     s = sym_push2(ps, v, type->t, c);
1114     s->type.ref = type->ref;
1115     s->r = r;
1116     /* don't record fields or anonymous symbols */
1117     /* XXX: simplify */
1118     if (!(v & SYM_FIELD) && (v & ~SYM_STRUCT) < SYM_FIRST_ANOM) {
1119         /* record symbol in token array */
1120         ts = table_ident[(v & ~SYM_STRUCT) - TOK_IDENT];
1121         if (v & SYM_STRUCT)
1122             ps = &ts->sym_struct;
1123         else
1124             ps = &ts->sym_identifier;
1125         s->prev_tok = *ps;
1126         *ps = s;
1127     }
1128     return s;
1129 }
1130
1131 /* push a global identifier */
1132 static Sym *global_identifier_push(int v, int t, int c)
1133 {
1134     Sym *s, **ps;
1135     s = sym_push2(&global_stack, v, t, c);
1136     /* don't record anonymous symbol */
1137     if (v < SYM_FIRST_ANOM) {
1138         ps = &table_ident[v - TOK_IDENT]->sym_identifier;
1139         /* modify the top most local identifier, so that
1140            sym_identifier will point to 's' when popped */
1141         while (*ps != NULL)
1142             ps = &(*ps)->prev_tok;
1143         s->prev_tok = NULL;
1144         *ps = s;
1145     }
1146     return s;
1147 }
1148
1149 /* pop symbols until top reaches 'b' */
1150 static void sym_pop(Sym **ptop, Sym *b)
1151 {
1152     Sym *s, *ss, **ps;
1153     TokenSym *ts;
1154     int v;
1155
1156     s = *ptop;
1157     while(s != b) {
1158         ss = s->prev;
1159         v = s->v;
1160         /* remove symbol in token array */
1161         /* XXX: simplify */
1162         if (!(v & SYM_FIELD) && (v & ~SYM_STRUCT) < SYM_FIRST_ANOM) {
1163             ts = table_ident[(v & ~SYM_STRUCT) - TOK_IDENT];
1164             if (v & SYM_STRUCT)
1165                 ps = &ts->sym_struct;
1166             else
1167                 ps = &ts->sym_identifier;
1168             *ps = s->prev_tok;
1169         }
1170         sym_free(s);
1171         s = ss;
1172     }
1173     *ptop = b;
1174 }
1175
1176 /* I/O layer */
1177
1178 BufferedFile *tcc_open(TCCState *s1, const char *filename)
1179 {
1180     int fd;
1181     BufferedFile *bf;
1182
1183     if (strcmp(filename, "-") == 0)
1184         fd = 0, filename = "stdin";
1185     else
1186         fd = open(filename, O_RDONLY | O_BINARY);
1187     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
1188         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
1189                (s1->include_stack_ptr - s1->include_stack), "", filename);
1190     if (fd < 0)
1191         return NULL;
1192     bf = tcc_malloc(sizeof(BufferedFile));
1193     bf->fd = fd;
1194     bf->buf_ptr = bf->buffer;
1195     bf->buf_end = bf->buffer;
1196     bf->buffer[0] = CH_EOB; /* put eob symbol */
1197     pstrcpy(bf->filename, sizeof(bf->filename), filename);
1198 #ifdef _WIN32
1199     normalize_slashes(bf->filename);
1200 #endif
1201     bf->line_num = 1;
1202     bf->ifndef_macro = 0;
1203     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
1204     //    printf("opening '%s'\n", filename);
1205     return bf;
1206 }
1207
1208 void tcc_close(BufferedFile *bf)
1209 {
1210     total_lines += bf->line_num;
1211     close(bf->fd);
1212     tcc_free(bf);
1213 }
1214
1215 /* compile the C file opened in 'file'. Return non zero if errors. */
1216 static int tcc_compile(TCCState *s1)
1217 {
1218     Sym *define_start;
1219     char buf[512];
1220     volatile int section_sym;
1221
1222 #ifdef INC_DEBUG
1223     printf("%s: **** new file\n", file->filename);
1224 #endif
1225     preprocess_init(s1);
1226
1227     cur_text_section = NULL;
1228     funcname = "";
1229     anon_sym = SYM_FIRST_ANOM;
1230
1231     /* file info: full path + filename */
1232     section_sym = 0; /* avoid warning */
1233     if (s1->do_debug) {
1234         section_sym = put_elf_sym(symtab_section, 0, 0,
1235                                   ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
1236                                   text_section->sh_num, NULL);
1237         getcwd(buf, sizeof(buf));
1238 #ifdef _WIN32
1239         normalize_slashes(buf);
1240 #endif
1241         pstrcat(buf, sizeof(buf), "/");
1242         put_stabs_r(buf, N_SO, 0, 0,
1243                     text_section->data_offset, text_section, section_sym);
1244         put_stabs_r(file->filename, N_SO, 0, 0,
1245                     text_section->data_offset, text_section, section_sym);
1246     }
1247     /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
1248        symbols can be safely used */
1249     put_elf_sym(symtab_section, 0, 0,
1250                 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
1251                 SHN_ABS, file->filename);
1252
1253     /* define some often used types */
1254     int_type.t = VT_INT;
1255
1256     char_pointer_type.t = VT_BYTE;
1257     mk_pointer(&char_pointer_type);
1258
1259     func_old_type.t = VT_FUNC;
1260     func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
1261
1262 #if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP)
1263     float_type.t = VT_FLOAT;
1264     double_type.t = VT_DOUBLE;
1265
1266     func_float_type.t = VT_FUNC;
1267     func_float_type.ref = sym_push(SYM_FIELD, &float_type, FUNC_CDECL, FUNC_OLD);
1268     func_double_type.t = VT_FUNC;
1269     func_double_type.ref = sym_push(SYM_FIELD, &double_type, FUNC_CDECL, FUNC_OLD);
1270 #endif
1271
1272 #if 0
1273     /* define 'void *alloca(unsigned int)' builtin function */
1274     {
1275         Sym *s1;
1276
1277         p = anon_sym++;
1278         sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
1279         s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
1280         s1->next = NULL;
1281         sym->next = s1;
1282         sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
1283     }
1284 #endif
1285
1286     define_start = define_stack;
1287     nocode_wanted = 1;
1288
1289     if (setjmp(s1->error_jmp_buf) == 0) {
1290         s1->nb_errors = 0;
1291         s1->error_set_jmp_enabled = 1;
1292
1293         ch = file->buf_ptr[0];
1294         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
1295         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
1296         next();
1297         decl(VT_CONST);
1298         if (tok != TOK_EOF)
1299             expect("declaration");
1300
1301         /* end of translation unit info */
1302         if (s1->do_debug) {
1303             put_stabs_r(NULL, N_SO, 0, 0,
1304                         text_section->data_offset, text_section, section_sym);
1305         }
1306     }
1307     s1->error_set_jmp_enabled = 0;
1308
1309     /* reset define stack, but leave -Dsymbols (may be incorrect if
1310        they are undefined) */
1311     free_defines(define_start);
1312
1313     gen_inline_functions();
1314
1315     sym_pop(&global_stack, NULL);
1316     sym_pop(&local_stack, NULL);
1317
1318     return s1->nb_errors != 0 ? -1 : 0;
1319 }
1320
1321 int tcc_compile_string(TCCState *s, const char *str)
1322 {
1323     BufferedFile bf1, *bf = &bf1;
1324     int ret, len;
1325     char *buf;
1326
1327     /* init file structure */
1328     bf->fd = -1;
1329     /* XXX: avoid copying */
1330     len = strlen(str);
1331     buf = tcc_malloc(len + 1);
1332     if (!buf)
1333         return -1;
1334     memcpy(buf, str, len);
1335     buf[len] = CH_EOB;
1336     bf->buf_ptr = buf;
1337     bf->buf_end = buf + len;
1338     pstrcpy(bf->filename, sizeof(bf->filename), "<string>");
1339     bf->line_num = 1;
1340     file = bf;
1341     ret = tcc_compile(s);
1342     file = NULL;
1343     tcc_free(buf);
1344
1345     /* currently, no need to close */
1346     return ret;
1347 }
1348
1349 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
1350 void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
1351 {
1352     BufferedFile bf1, *bf = &bf1;
1353
1354     pstrcpy(bf->buffer, IO_BUF_SIZE, sym);
1355     pstrcat(bf->buffer, IO_BUF_SIZE, " ");
1356     /* default value */
1357     if (!value)
1358         value = "1";
1359     pstrcat(bf->buffer, IO_BUF_SIZE, value);
1360
1361     /* init file structure */
1362     bf->fd = -1;
1363     bf->buf_ptr = bf->buffer;
1364     bf->buf_end = bf->buffer + strlen(bf->buffer);
1365     *bf->buf_end = CH_EOB;
1366     bf->filename[0] = '\0';
1367     bf->line_num = 1;
1368     file = bf;
1369
1370     s1->include_stack_ptr = s1->include_stack;
1371
1372     /* parse with define parser */
1373     ch = file->buf_ptr[0];
1374     next_nomacro();
1375     parse_define();
1376     file = NULL;
1377 }
1378
1379 /* undefine a preprocessor symbol */
1380 void tcc_undefine_symbol(TCCState *s1, const char *sym)
1381 {
1382     TokenSym *ts;
1383     Sym *s;
1384     ts = tok_alloc(sym, strlen(sym));
1385     s = define_find(ts->tok);
1386     /* undefine symbol by putting an invalid name */
1387     if (s)
1388         define_undef(s);
1389 }
1390
1391
1392 #ifdef CONFIG_TCC_BACKTRACE
1393 /* print the position in the source file of PC value 'pc' by reading
1394    the stabs debug information */
1395 static unsigned long rt_printline(unsigned long wanted_pc)
1396 {
1397     Stab_Sym *sym, *sym_end;
1398     char func_name[128], last_func_name[128];
1399     unsigned long func_addr, last_pc, pc;
1400     const char *incl_files[INCLUDE_STACK_SIZE];
1401     int incl_index, len, last_line_num, i;
1402     const char *str, *p;
1403
1404     fprintf(stderr, "0x%08lx:", wanted_pc);
1405
1406     func_name[0] = '\0';
1407     func_addr = 0;
1408     incl_index = 0;
1409     last_func_name[0] = '\0';
1410     last_pc = 0xffffffff;
1411     last_line_num = 1;
1412     sym = (Stab_Sym *)stab_section->data + 1;
1413     sym_end = (Stab_Sym *)(stab_section->data + stab_section->data_offset);
1414     while (sym < sym_end) {
1415         switch(sym->n_type) {
1416             /* function start or end */
1417         case N_FUN:
1418             if (sym->n_strx == 0) {
1419                 /* we test if between last line and end of function */
1420                 pc = sym->n_value + func_addr;
1421                 if (wanted_pc >= last_pc && wanted_pc < pc)
1422                     goto found;
1423                 func_name[0] = '\0';
1424                 func_addr = 0;
1425             } else {
1426                 str = stabstr_section->data + sym->n_strx;
1427                 p = strchr(str, ':');
1428                 if (!p) {
1429                     pstrcpy(func_name, sizeof(func_name), str);
1430                 } else {
1431                     len = p - str;
1432                     if (len > sizeof(func_name) - 1)
1433                         len = sizeof(func_name) - 1;
1434                     memcpy(func_name, str, len);
1435                     func_name[len] = '\0';
1436                 }
1437                 func_addr = sym->n_value;
1438             }
1439             break;
1440             /* line number info */
1441         case N_SLINE:
1442             pc = sym->n_value + func_addr;
1443             if (wanted_pc >= last_pc && wanted_pc < pc)
1444                 goto found;
1445             last_pc = pc;
1446             last_line_num = sym->n_desc;
1447             /* XXX: slow! */
1448             strcpy(last_func_name, func_name);
1449             break;
1450             /* include files */
1451         case N_BINCL:
1452             str = stabstr_section->data + sym->n_strx;
1453         add_incl:
1454             if (incl_index < INCLUDE_STACK_SIZE) {
1455                 incl_files[incl_index++] = str;
1456             }
1457             break;
1458         case N_EINCL:
1459             if (incl_index > 1)
1460                 incl_index--;
1461             break;
1462         case N_SO:
1463             if (sym->n_strx == 0) {
1464                 incl_index = 0; /* end of translation unit */
1465             } else {
1466                 str = stabstr_section->data + sym->n_strx;
1467                 /* do not add path */
1468                 len = strlen(str);
1469                 if (len > 0 && str[len - 1] != '/')
1470                     goto add_incl;
1471             }
1472             break;
1473         }
1474         sym++;
1475     }
1476
1477     /* second pass: we try symtab symbols (no line number info) */
1478     incl_index = 0;
1479     {
1480         ElfW(Sym) *sym, *sym_end;
1481         int type;
1482
1483         sym_end = (ElfW(Sym) *)(symtab_section->data + symtab_section->data_offset);
1484         for(sym = (ElfW(Sym) *)symtab_section->data + 1;
1485             sym < sym_end;
1486             sym++) {
1487             type = ELFW(ST_TYPE)(sym->st_info);
1488             if (type == STT_FUNC) {
1489                 if (wanted_pc >= sym->st_value &&
1490                     wanted_pc < sym->st_value + sym->st_size) {
1491                     pstrcpy(last_func_name, sizeof(last_func_name),
1492                             strtab_section->data + sym->st_name);
1493                     func_addr = sym->st_value;
1494                     goto found;
1495                 }
1496             }
1497         }
1498     }
1499     /* did not find any info: */
1500     fprintf(stderr, " ???\n");
1501     return 0;
1502  found:
1503     if (last_func_name[0] != '\0') {
1504         fprintf(stderr, " %s()", last_func_name);
1505     }
1506     if (incl_index > 0) {
1507         fprintf(stderr, " (%s:%d",
1508                 incl_files[incl_index - 1], last_line_num);
1509         for(i = incl_index - 2; i >= 0; i--)
1510             fprintf(stderr, ", included from %s", incl_files[i]);
1511         fprintf(stderr, ")");
1512     }
1513     fprintf(stderr, "\n");
1514     return func_addr;
1515 }
1516
1517 #ifdef __i386__
1518 /* fix for glibc 2.1 */
1519 #ifndef REG_EIP
1520 #define REG_EIP EIP
1521 #define REG_EBP EBP
1522 #endif
1523
1524 /* return the PC at frame level 'level'. Return non zero if not found */
1525 static int rt_get_caller_pc(unsigned long *paddr,
1526                             ucontext_t *uc, int level)
1527 {
1528     unsigned long fp;
1529     int i;
1530
1531     if (level == 0) {
1532 #if defined(__FreeBSD__)
1533         *paddr = uc->uc_mcontext.mc_eip;
1534 #elif defined(__dietlibc__)
1535         *paddr = uc->uc_mcontext.eip;
1536 #else
1537         *paddr = uc->uc_mcontext.gregs[REG_EIP];
1538 #endif
1539         return 0;
1540     } else {
1541 #if defined(__FreeBSD__)
1542         fp = uc->uc_mcontext.mc_ebp;
1543 #elif defined(__dietlibc__)
1544         fp = uc->uc_mcontext.ebp;
1545 #else
1546         fp = uc->uc_mcontext.gregs[REG_EBP];
1547 #endif
1548         for(i=1;i<level;i++) {
1549             /* XXX: check address validity with program info */
1550             if (fp <= 0x1000 || fp >= 0xc0000000)
1551                 return -1;
1552             fp = ((unsigned long *)fp)[0];
1553         }
1554         *paddr = ((unsigned long *)fp)[1];
1555         return 0;
1556     }
1557 }
1558 #elif defined(__x86_64__)
1559 /* return the PC at frame level 'level'. Return non zero if not found */
1560 static int rt_get_caller_pc(unsigned long *paddr,
1561                             ucontext_t *uc, int level)
1562 {
1563     unsigned long fp;
1564     int i;
1565
1566     if (level == 0) {
1567         /* XXX: only support linux */
1568         *paddr = uc->uc_mcontext.gregs[REG_RIP];
1569         return 0;
1570     } else {
1571         fp = uc->uc_mcontext.gregs[REG_RBP];
1572         for(i=1;i<level;i++) {
1573             /* XXX: check address validity with program info */
1574             if (fp <= 0x1000)
1575                 return -1;
1576             fp = ((unsigned long *)fp)[0];
1577         }
1578         *paddr = ((unsigned long *)fp)[1];
1579         return 0;
1580     }
1581 }
1582 #else
1583 #warning add arch specific rt_get_caller_pc()
1584 static int rt_get_caller_pc(unsigned long *paddr,
1585                             ucontext_t *uc, int level)
1586 {
1587     return -1;
1588 }
1589 #endif
1590
1591 /* emit a run time error at position 'pc' */
1592 void rt_error(ucontext_t *uc, const char *fmt, ...)
1593 {
1594     va_list ap;
1595     unsigned long pc;
1596     int i;
1597
1598     va_start(ap, fmt);
1599     fprintf(stderr, "Runtime error: ");
1600     vfprintf(stderr, fmt, ap);
1601     fprintf(stderr, "\n");
1602     for(i=0;i<num_callers;i++) {
1603         if (rt_get_caller_pc(&pc, uc, i) < 0)
1604             break;
1605         if (i == 0)
1606             fprintf(stderr, "at ");
1607         else
1608             fprintf(stderr, "by ");
1609         pc = rt_printline(pc);
1610         if (pc == rt_prog_main && pc)
1611             break;
1612     }
1613     exit(255);
1614     va_end(ap);
1615 }
1616
1617 /* signal handler for fatal errors */
1618 static void sig_error(int signum, siginfo_t *siginf, void *puc)
1619 {
1620     ucontext_t *uc = puc;
1621
1622     switch(signum) {
1623     case SIGFPE:
1624         switch(siginf->si_code) {
1625         case FPE_INTDIV:
1626         case FPE_FLTDIV:
1627             rt_error(uc, "division by zero");
1628             break;
1629         default:
1630             rt_error(uc, "floating point exception");
1631             break;
1632         }
1633         break;
1634     case SIGBUS:
1635     case SIGSEGV:
1636         if (rt_bound_error_msg && *rt_bound_error_msg)
1637             rt_error(uc, *rt_bound_error_msg);
1638         else
1639             rt_error(uc, "dereferencing invalid pointer");
1640         break;
1641     case SIGILL:
1642         rt_error(uc, "illegal instruction");
1643         break;
1644     case SIGABRT:
1645         rt_error(uc, "abort() called");
1646         break;
1647     default:
1648         rt_error(uc, "caught signal %d", signum);
1649         break;
1650     }
1651     exit(255);
1652 }
1653
1654 #endif
1655
1656 /* copy code into memory passed in by the caller and do all relocations
1657    (needed before using tcc_get_symbol()).
1658    returns -1 on error and required size if ptr is NULL */
1659 int tcc_relocate(TCCState *s1, void *ptr)
1660 {
1661     Section *s;
1662     unsigned long offset, length, mem;
1663     int i;
1664
1665     if (0 == s1->runtime_added) {
1666         s1->runtime_added = 1;
1667         s1->nb_errors = 0;
1668 #ifdef TCC_TARGET_PE
1669         pe_add_runtime(s1);
1670         relocate_common_syms();
1671         tcc_add_linker_symbols(s1);
1672 #else
1673         tcc_add_runtime(s1);
1674         relocate_common_syms();
1675         tcc_add_linker_symbols(s1);
1676         build_got_entries(s1);
1677 #endif
1678     }
1679
1680     offset = 0, mem = (unsigned long)ptr;
1681     for(i = 1; i < s1->nb_sections; i++) {
1682         s = s1->sections[i];
1683         if (0 == (s->sh_flags & SHF_ALLOC))
1684             continue;
1685         length = s->data_offset;
1686         s->sh_addr = mem ? (mem + offset + 15) & ~15 : 0;
1687         offset = (offset + length + 15) & ~15;
1688     }
1689
1690     /* relocate symbols */
1691     relocate_syms(s1, 1);
1692     if (s1->nb_errors)
1693         return -1;
1694
1695 #ifdef TCC_TARGET_X86_64
1696     s1->runtime_plt_and_got_offset = 0;
1697     s1->runtime_plt_and_got = (char *)(mem + offset);
1698     /* double the size of the buffer for got and plt entries
1699        XXX: calculate exact size for them? */
1700     offset *= 2;
1701 #endif
1702
1703     if (0 == mem)
1704         return offset + 15;
1705
1706     /* relocate each section */
1707     for(i = 1; i < s1->nb_sections; i++) {
1708         s = s1->sections[i];
1709         if (s->reloc)
1710             relocate_section(s1, s);
1711     }
1712
1713     for(i = 1; i < s1->nb_sections; i++) {
1714         s = s1->sections[i];
1715         if (0 == (s->sh_flags & SHF_ALLOC))
1716             continue;
1717         length = s->data_offset;
1718         // printf("%-12s %08x %04x\n", s->name, s->sh_addr, length);
1719         ptr = (void*)s->sh_addr;
1720         if (NULL == s->data || s->sh_type == SHT_NOBITS)
1721             memset(ptr, 0, length);
1722         else
1723             memcpy(ptr, s->data, length);
1724         /* mark executable sections as executable in memory */
1725         if (s->sh_flags & SHF_EXECINSTR)
1726             set_pages_executable(ptr, length);
1727     }
1728 #ifdef TCC_TARGET_X86_64
1729     set_pages_executable(s1->runtime_plt_and_got,
1730                          s1->runtime_plt_and_got_offset);
1731 #endif
1732     return 0;
1733 }
1734
1735 /* launch the compiled program with the given arguments */
1736 int tcc_run(TCCState *s1, int argc, char **argv)
1737 {
1738     int (*prog_main)(int, char **);
1739     void *ptr;
1740     int ret;
1741
1742     ret = tcc_relocate(s1, NULL);
1743     if (ret < 0)
1744         return -1;
1745     ptr = tcc_malloc(ret);
1746     tcc_relocate(s1, ptr);
1747
1748     prog_main = tcc_get_symbol_err(s1, "main");
1749
1750     if (s1->do_debug) {
1751 #ifdef CONFIG_TCC_BACKTRACE
1752         struct sigaction sigact;
1753         /* install TCC signal handlers to print debug info on fatal
1754            runtime errors */
1755         sigact.sa_flags = SA_SIGINFO | SA_RESETHAND;
1756         sigact.sa_sigaction = sig_error;
1757         sigemptyset(&sigact.sa_mask);
1758         sigaction(SIGFPE, &sigact, NULL);
1759         sigaction(SIGILL, &sigact, NULL);
1760         sigaction(SIGSEGV, &sigact, NULL);
1761         sigaction(SIGBUS, &sigact, NULL);
1762         sigaction(SIGABRT, &sigact, NULL);
1763 #else
1764         error("debug mode not available");
1765 #endif
1766     }
1767
1768 #ifdef CONFIG_TCC_BCHECK
1769     if (s1->do_bounds_check) {
1770         void (*bound_init)(void);
1771         void (*bound_exit)(void);
1772         /* set error function */
1773         rt_bound_error_msg = tcc_get_symbol_err(s1, "__bound_error_msg");
1774         rt_prog_main = (unsigned long)prog_main;
1775         /* XXX: use .init section so that it also work in binary ? */
1776         bound_init = tcc_get_symbol_err(s1, "__bound_init");
1777         bound_exit = tcc_get_symbol_err(s1, "__bound_exit");
1778         bound_init();
1779         ret = (*prog_main)(argc, argv);
1780         bound_exit();
1781     } else
1782 #endif
1783     ret = (*prog_main)(argc, argv);
1784     tcc_free(ptr);
1785     return ret;
1786 }
1787
1788 void tcc_memstats(void)
1789 {
1790 #ifdef MEM_DEBUG
1791     printf("memory in use: %d\n", mem_cur_size);
1792 #endif
1793 }
1794
1795 static void tcc_cleanup(void)
1796 {
1797     int i, n;
1798
1799     if (NULL == tcc_state)
1800         return;
1801     tcc_state = NULL;
1802
1803     /* free -D defines */
1804     free_defines(NULL);
1805
1806     /* free tokens */
1807     n = tok_ident - TOK_IDENT;
1808     for(i = 0; i < n; i++)
1809         tcc_free(table_ident[i]);
1810     tcc_free(table_ident);
1811
1812     /* free sym_pools */
1813     dynarray_reset(&sym_pools, &nb_sym_pools);
1814     /* string buffer */
1815     cstr_free(&tokcstr);
1816     /* reset symbol stack */
1817     sym_free_first = NULL;
1818     /* cleanup from error/setjmp */
1819     macro_ptr = NULL;
1820 }
1821
1822 TCCState *tcc_new(void)
1823 {
1824     TCCState *s;
1825
1826     tcc_cleanup();
1827
1828     s = tcc_mallocz(sizeof(TCCState));
1829     if (!s)
1830         return NULL;
1831     tcc_state = s;
1832     s->output_type = TCC_OUTPUT_MEMORY;
1833     s->tcc_lib_path = CONFIG_TCCDIR;
1834
1835     preprocess_new();
1836
1837     /* we add dummy defines for some special macros to speed up tests
1838        and to have working defined() */
1839     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
1840     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
1841     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
1842     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
1843
1844     /* standard defines */
1845     tcc_define_symbol(s, "__STDC__", NULL);
1846     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
1847 #if defined(TCC_TARGET_I386)
1848     tcc_define_symbol(s, "__i386__", NULL);
1849 #endif
1850 #if defined(TCC_TARGET_X86_64)
1851     tcc_define_symbol(s, "__x86_64__", NULL);
1852 #endif
1853 #if defined(TCC_TARGET_ARM)
1854     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
1855     tcc_define_symbol(s, "__arm_elf__", NULL);
1856     tcc_define_symbol(s, "__arm_elf", NULL);
1857     tcc_define_symbol(s, "arm_elf", NULL);
1858     tcc_define_symbol(s, "__arm__", NULL);
1859     tcc_define_symbol(s, "__arm", NULL);
1860     tcc_define_symbol(s, "arm", NULL);
1861     tcc_define_symbol(s, "__APCS_32__", NULL);
1862 #endif
1863 #ifdef TCC_TARGET_PE
1864     tcc_define_symbol(s, "_WIN32", NULL);
1865 #else
1866     tcc_define_symbol(s, "__unix__", NULL);
1867     tcc_define_symbol(s, "__unix", NULL);
1868 #if defined(__linux)
1869     tcc_define_symbol(s, "__linux__", NULL);
1870     tcc_define_symbol(s, "__linux", NULL);
1871 #endif
1872 #endif
1873     /* tiny C specific defines */
1874     tcc_define_symbol(s, "__TINYC__", NULL);
1875
1876     /* tiny C & gcc defines */
1877     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned int");
1878     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "int");
1879 #ifdef TCC_TARGET_PE
1880     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
1881 #else
1882     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
1883 #endif
1884
1885 #ifndef TCC_TARGET_PE
1886     /* default library paths */
1887     tcc_add_library_path(s, CONFIG_SYSROOT "/usr/local/lib");
1888     tcc_add_library_path(s, CONFIG_SYSROOT "/usr/lib");
1889     tcc_add_library_path(s, CONFIG_SYSROOT "/lib");
1890 #endif
1891
1892     /* no section zero */
1893     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
1894
1895     /* create standard sections */
1896     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
1897     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
1898     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
1899
1900     /* symbols are always generated for linking stage */
1901     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
1902                                 ".strtab",
1903                                 ".hashtab", SHF_PRIVATE);
1904     strtab_section = symtab_section->link;
1905
1906     /* private symbol table for dynamic symbols */
1907     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
1908                                       ".dynstrtab",
1909                                       ".dynhashtab", SHF_PRIVATE);
1910     s->alacarte_link = 1;
1911
1912 #ifdef CHAR_IS_UNSIGNED
1913     s->char_is_unsigned = 1;
1914 #endif
1915 #if defined(TCC_TARGET_PE) && 0
1916     /* XXX: currently the PE linker is not ready to support that */
1917     s->leading_underscore = 1;
1918 #endif
1919     return s;
1920 }
1921
1922 void tcc_delete(TCCState *s1)
1923 {
1924     int i;
1925
1926     tcc_cleanup();
1927
1928     /* free all sections */
1929     for(i = 1; i < s1->nb_sections; i++)
1930         free_section(s1->sections[i]);
1931     dynarray_reset(&s1->sections, &s1->nb_sections);
1932
1933     for(i = 0; i < s1->nb_priv_sections; i++)
1934         free_section(s1->priv_sections[i]);
1935     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1936
1937     /* free any loaded DLLs */
1938     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1939         DLLReference *ref = s1->loaded_dlls[i];
1940         if ( ref->handle )
1941             dlclose(ref->handle);
1942     }
1943
1944     /* free loaded dlls array */
1945     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1946
1947     /* free library paths */
1948     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1949
1950     /* free include paths */
1951     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1952     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1953     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1954
1955     tcc_free(s1);
1956 }
1957
1958 int tcc_add_include_path(TCCState *s1, const char *pathname)
1959 {
1960     char *pathname1;
1961
1962     pathname1 = tcc_strdup(pathname);
1963     dynarray_add((void ***)&s1->include_paths, &s1->nb_include_paths, pathname1);
1964     return 0;
1965 }
1966
1967 int tcc_add_sysinclude_path(TCCState *s1, const char *pathname)
1968 {
1969     char *pathname1;
1970
1971     pathname1 = tcc_strdup(pathname);
1972     dynarray_add((void ***)&s1->sysinclude_paths, &s1->nb_sysinclude_paths, pathname1);
1973     return 0;
1974 }
1975
1976 static int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1977 {
1978     const char *ext;
1979     ElfW(Ehdr) ehdr;
1980     int fd, ret;
1981     BufferedFile *saved_file;
1982
1983     /* find source file type with extension */
1984     ext = tcc_fileextension(filename);
1985     if (ext[0])
1986         ext++;
1987
1988     /* open the file */
1989     saved_file = file;
1990     file = tcc_open(s1, filename);
1991     if (!file) {
1992         if (flags & AFF_PRINT_ERROR) {
1993             error_noabort("file '%s' not found", filename);
1994         }
1995         ret = -1;
1996         goto fail1;
1997     }
1998
1999     if (flags & AFF_PREPROCESS) {
2000         ret = tcc_preprocess(s1);
2001     } else if (!ext[0] || !PATHCMP(ext, "c")) {
2002         /* C file assumed */
2003         ret = tcc_compile(s1);
2004     } else
2005 #ifdef CONFIG_TCC_ASM
2006     if (!strcmp(ext, "S")) {
2007         /* preprocessed assembler */
2008         ret = tcc_assemble(s1, 1);
2009     } else if (!strcmp(ext, "s")) {
2010         /* non preprocessed assembler */
2011         ret = tcc_assemble(s1, 0);
2012     } else
2013 #endif
2014 #ifdef TCC_TARGET_PE
2015     if (!PATHCMP(ext, "def")) {
2016         ret = pe_load_def_file(s1, file->fd);
2017     } else
2018 #endif
2019     {
2020         fd = file->fd;
2021         /* assume executable format: auto guess file type */
2022         ret = read(fd, &ehdr, sizeof(ehdr));
2023         lseek(fd, 0, SEEK_SET);
2024         if (ret <= 0) {
2025             error_noabort("could not read header");
2026             goto fail;
2027         } else if (ret != sizeof(ehdr)) {
2028             goto try_load_script;
2029         }
2030
2031         if (ehdr.e_ident[0] == ELFMAG0 &&
2032             ehdr.e_ident[1] == ELFMAG1 &&
2033             ehdr.e_ident[2] == ELFMAG2 &&
2034             ehdr.e_ident[3] == ELFMAG3) {
2035             file->line_num = 0; /* do not display line number if error */
2036             if (ehdr.e_type == ET_REL) {
2037                 ret = tcc_load_object_file(s1, fd, 0);
2038             } else if (ehdr.e_type == ET_DYN) {
2039                 if (s1->output_type == TCC_OUTPUT_MEMORY) {
2040 #ifdef TCC_TARGET_PE
2041                     ret = -1;
2042 #else
2043                     void *h;
2044                     h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
2045                     if (h)
2046                         ret = 0;
2047                     else
2048                         ret = -1;
2049 #endif
2050                 } else {
2051                     ret = tcc_load_dll(s1, fd, filename,
2052                                        (flags & AFF_REFERENCED_DLL) != 0);
2053                 }
2054             } else {
2055                 error_noabort("unrecognized ELF file");
2056                 goto fail;
2057             }
2058         } else if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
2059             file->line_num = 0; /* do not display line number if error */
2060             ret = tcc_load_archive(s1, fd);
2061         } else
2062 #ifdef TCC_TARGET_COFF
2063         if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
2064             ret = tcc_load_coff(s1, fd);
2065         } else
2066 #endif
2067 #ifdef TCC_TARGET_PE
2068         if (pe_test_res_file(&ehdr, ret)) {
2069             ret = pe_load_res_file(s1, fd);
2070         } else
2071 #endif
2072         {
2073             /* as GNU ld, consider it is an ld script if not recognized */
2074         try_load_script:
2075             ret = tcc_load_ldscript(s1);
2076             if (ret < 0) {
2077                 error_noabort("unrecognized file type");
2078                 goto fail;
2079             }
2080         }
2081     }
2082  the_end:
2083     tcc_close(file);
2084  fail1:
2085     file = saved_file;
2086     return ret;
2087  fail:
2088     ret = -1;
2089     goto the_end;
2090 }
2091
2092 int tcc_add_file(TCCState *s, const char *filename)
2093 {
2094     if (s->output_type == TCC_OUTPUT_PREPROCESS)
2095         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS);
2096     else
2097         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR);
2098 }
2099
2100 int tcc_add_library_path(TCCState *s, const char *pathname)
2101 {
2102     char *pathname1;
2103
2104     pathname1 = tcc_strdup(pathname);
2105     dynarray_add((void ***)&s->library_paths, &s->nb_library_paths, pathname1);
2106     return 0;
2107 }
2108
2109 /* find and load a dll. Return non zero if not found */
2110 /* XXX: add '-rpath' option support ? */
2111 static int tcc_add_dll(TCCState *s, const char *filename, int flags)
2112 {
2113     char buf[1024];
2114     int i;
2115
2116     for(i = 0; i < s->nb_library_paths; i++) {
2117         snprintf(buf, sizeof(buf), "%s/%s",
2118                  s->library_paths[i], filename);
2119         if (tcc_add_file_internal(s, buf, flags) == 0)
2120             return 0;
2121     }
2122     return -1;
2123 }
2124
2125 /* the library name is the same as the argument of the '-l' option */
2126 int tcc_add_library(TCCState *s, const char *libraryname)
2127 {
2128     char buf[1024];
2129     int i;
2130
2131     /* first we look for the dynamic library if not static linking */
2132     if (!s->static_link) {
2133 #ifdef TCC_TARGET_PE
2134         snprintf(buf, sizeof(buf), "%s.def", libraryname);
2135 #else
2136         snprintf(buf, sizeof(buf), "lib%s.so", libraryname);
2137 #endif
2138         if (tcc_add_dll(s, buf, 0) == 0)
2139             return 0;
2140     }
2141
2142     /* then we look for the static library */
2143     for(i = 0; i < s->nb_library_paths; i++) {
2144         snprintf(buf, sizeof(buf), "%s/lib%s.a",
2145                  s->library_paths[i], libraryname);
2146         if (tcc_add_file_internal(s, buf, 0) == 0)
2147             return 0;
2148     }
2149     return -1;
2150 }
2151
2152 int tcc_add_symbol(TCCState *s, const char *name, void *val)
2153 {
2154     add_elf_sym(symtab_section, (unsigned long)val, 0,
2155                 ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
2156                 SHN_ABS, name);
2157     return 0;
2158 }
2159
2160 int tcc_set_output_type(TCCState *s, int output_type)
2161 {
2162     char buf[1024];
2163
2164     s->output_type = output_type;
2165
2166     if (!s->nostdinc) {
2167         /* default include paths */
2168         /* XXX: reverse order needed if -isystem support */
2169 #ifndef TCC_TARGET_PE
2170         tcc_add_sysinclude_path(s, CONFIG_SYSROOT "/usr/local/include");
2171         tcc_add_sysinclude_path(s, CONFIG_SYSROOT "/usr/include");
2172 #endif
2173         snprintf(buf, sizeof(buf), "%s/include", s->tcc_lib_path);
2174         tcc_add_sysinclude_path(s, buf);
2175 #ifdef TCC_TARGET_PE
2176         snprintf(buf, sizeof(buf), "%s/include/winapi", s->tcc_lib_path);
2177         tcc_add_sysinclude_path(s, buf);
2178 #endif
2179     }
2180
2181     /* if bound checking, then add corresponding sections */
2182 #ifdef CONFIG_TCC_BCHECK
2183     if (s->do_bounds_check) {
2184         /* define symbol */
2185         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
2186         /* create bounds sections */
2187         bounds_section = new_section(s, ".bounds",
2188                                      SHT_PROGBITS, SHF_ALLOC);
2189         lbounds_section = new_section(s, ".lbounds",
2190                                       SHT_PROGBITS, SHF_ALLOC);
2191     }
2192 #endif
2193
2194     if (s->char_is_unsigned) {
2195         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
2196     }
2197
2198     /* add debug sections */
2199     if (s->do_debug) {
2200         /* stab symbols */
2201         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
2202         stab_section->sh_entsize = sizeof(Stab_Sym);
2203         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
2204         put_elf_str(stabstr_section, "");
2205         stab_section->link = stabstr_section;
2206         /* put first entry */
2207         put_stabs("", 0, 0, 0, 0);
2208     }
2209
2210     /* add libc crt1/crti objects */
2211 #ifndef TCC_TARGET_PE
2212     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
2213         !s->nostdlib) {
2214         if (output_type != TCC_OUTPUT_DLL)
2215             tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crt1.o");
2216         tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crti.o");
2217     }
2218 #endif
2219
2220 #ifdef TCC_TARGET_PE
2221     snprintf(buf, sizeof(buf), "%s/lib", s->tcc_lib_path);
2222     tcc_add_library_path(s, buf);
2223 #endif
2224
2225     return 0;
2226 }
2227
2228 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
2229 #define FD_INVERT 0x0002 /* invert value before storing */
2230
2231 typedef struct FlagDef {
2232     uint16_t offset;
2233     uint16_t flags;
2234     const char *name;
2235 } FlagDef;
2236
2237 static const FlagDef warning_defs[] = {
2238     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
2239     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
2240     { offsetof(TCCState, warn_error), 0, "error" },
2241     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
2242       "implicit-function-declaration" },
2243 };
2244
2245 static int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
2246                     const char *name, int value)
2247 {
2248     int i;
2249     const FlagDef *p;
2250     const char *r;
2251
2252     r = name;
2253     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
2254         r += 3;
2255         value = !value;
2256     }
2257     for(i = 0, p = flags; i < nb_flags; i++, p++) {
2258         if (!strcmp(r, p->name))
2259             goto found;
2260     }
2261     return -1;
2262  found:
2263     if (p->flags & FD_INVERT)
2264         value = !value;
2265     *(int *)((uint8_t *)s + p->offset) = value;
2266     return 0;
2267 }
2268
2269
2270 /* set/reset a warning */
2271 int tcc_set_warning(TCCState *s, const char *warning_name, int value)
2272 {
2273     int i;
2274     const FlagDef *p;
2275
2276     if (!strcmp(warning_name, "all")) {
2277         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
2278             if (p->flags & WD_ALL)
2279                 *(int *)((uint8_t *)s + p->offset) = 1;
2280         }
2281         return 0;
2282     } else {
2283         return set_flag(s, warning_defs, countof(warning_defs),
2284                         warning_name, value);
2285     }
2286 }
2287
2288 static const FlagDef flag_defs[] = {
2289     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
2290     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
2291     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
2292     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
2293 };
2294
2295 /* set/reset a flag */
2296 int tcc_set_flag(TCCState *s, const char *flag_name, int value)
2297 {
2298     return set_flag(s, flag_defs, countof(flag_defs),
2299                     flag_name, value);
2300 }
2301
2302 /* set CONFIG_TCCDIR at runtime */
2303 void tcc_set_lib_path(TCCState *s, const char *path)
2304 {
2305     s->tcc_lib_path = tcc_strdup(path);
2306 }
2307
2308 void tcc_print_stats(TCCState *s, int64_t total_time)
2309 {
2310     double tt;
2311     tt = (double)total_time / 1000000.0;
2312     if (tt < 0.001)
2313         tt = 0.001;
2314     if (total_bytes < 1)
2315         total_bytes = 1;
2316     printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
2317            tok_ident - TOK_IDENT, total_lines, total_bytes,
2318            tt, (int)(total_lines / tt),
2319            total_bytes / tt / 1000000.0);
2320 }