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 #endif
 114
 115 /* XXX: get rid of this ASAP */
 116 static struct TCCState *tcc_state;
 117
 118 /********************************************************/
 119 /* function prototypes */
 120
 121 /* tccpp.c */
 122 static void next(void);
 123 char *get_tok_str(int v, CValue *cv);
 124
 125 /* tccgen.c */
 126 static void parse_expr_type(CType *type);
 127 static void expr_type(CType *type);
 128 static void unary_type(CType *type);
 129 static void block(int *bsym, int *csym, int *case_sym, int *def_sym,
 130                   int case_reg, int is_expr);
 131 static int expr_const(void);
 132 static void expr_eq(void);
 133 static void gexpr(void);
 134 static void gen_inline_functions(void);
 135 static void decl(int l);
 136 static void decl_initializer(CType *type, Section *sec, unsigned long c,
 137                              int first, int size_only);
 138 static void decl_initializer_alloc(CType *type, AttributeDef *ad, int r,
 139                                    int has_init, int v, int scope);
 140 int gv(int rc);
 141 void gv2(int rc1, int rc2);
 142 void move_reg(int r, int s);
 143 void save_regs(int n);
 144 void save_reg(int r);
 145 void vpop(void);
 146 void vswap(void);
 147 void vdup(void);
 148 int get_reg(int rc);
 149 int get_reg_ex(int rc,int rc2);
 150
 151 void gen_op(int op);
 152 void force_charshort_cast(int t);
 153 static void gen_cast(CType *type);
 154 void vstore(void);
 155 static Sym *sym_find(int v);
 156 static Sym *sym_push(int v, CType *type, int r, int c);
 157
 158 /* type handling */
 159 static int type_size(CType *type, int *a);
 160 static inline CType *pointed_type(CType *type);
 161 static int pointed_size(CType *type);
 162 static int lvalue_type(int t);
 163 static int parse_btype(CType *type, AttributeDef *ad);
 164 static void type_decl(CType *type, AttributeDef *ad, int *v, int td);
 165 static int compare_types(CType *type1, CType *type2, int unqualified);
 166 static int is_compatible_types(CType *type1, CType *type2);
 167 static int is_compatible_parameter_types(CType *type1, CType *type2);
 168
 169 int ieee_finite(double d);
 170 void vpushi(int v);
 171 void vpushll(long long v);
 172 void vrott(int n);
 173 void vnrott(int n);
 174 void lexpand_nr(void);
 175 static void vpush_global_sym(CType *type, int v);
 176 void vset(CType *type, int r, int v);
 177 void type_to_str(char *buf, int buf_size,
 178                  CType *type, const char *varstr);
 179 static Sym *get_sym_ref(CType *type, Section *sec,
 180                         unsigned long offset, unsigned long size);
 181 static Sym *external_global_sym(int v, CType *type, int r);
 182
 183 /* section generation */
 184 static void section_realloc(Section *sec, unsigned long new_size);
 185 static void *section_ptr_add(Section *sec, unsigned long size);
 186 static void put_extern_sym(Sym *sym, Section *section,
 187                            unsigned long value, unsigned long size);
 188 static void greloc(Section *s, Sym *sym, unsigned long addr, int type);
 189 static int put_elf_str(Section *s, const char *sym);
 190 static int put_elf_sym(Section *s,
 191                        unsigned long value, unsigned long size,
 192                        int info, int other, int shndx, const char *name);
 193 static int add_elf_sym(Section *s, unsigned long value, unsigned long size,
 194                        int info, int other, int sh_num, const char *name);
 195 static void put_elf_reloc(Section *symtab, Section *s, unsigned long offset,
 196                           int type, int symbol);
 197 static void put_stabs(const char *str, int type, int other, int desc,
 198                       unsigned long value);
 199 static void put_stabs_r(const char *str, int type, int other, int desc,
 200                         unsigned long value, Section *sec, int sym_index);
 201 static void put_stabn(int type, int other, int desc, int value);
 202 static void put_stabd(int type, int other, int desc);
 203 static int tcc_add_dll(TCCState *s, const char *filename, int flags);
 204
 205 #define AFF_PRINT_ERROR     0x0001 /* print error if file not found */
 206 #define AFF_REFERENCED_DLL  0x0002 /* load a referenced dll from another dll */
 207 #define AFF_PREPROCESS      0x0004 /* preprocess file */
 208 static int tcc_add_file_internal(TCCState *s, const char *filename, int flags);
 209
 210 /* tcccoff.c */
 211 int tcc_output_coff(TCCState *s1, FILE *f);
 212
 213 /* tccpe.c */
 214 void *resolve_sym(TCCState *s1, const char *sym, int type);
 215 int pe_load_def_file(struct TCCState *s1, int fd);
 216 int pe_test_res_file(void *v, int size);
 217 int pe_load_res_file(struct TCCState *s1, int fd);
 218 void pe_add_runtime(struct TCCState *s1);
 219 void pe_guess_outfile(char *objfilename, int output_type);
 220 int pe_output_file(struct TCCState *s1, const char *filename);
 221
 222 /* tccasm.c */
 223 #ifdef CONFIG_TCC_ASM
 224 static void asm_expr(TCCState *s1, ExprValue *pe);
 225 static int asm_int_expr(TCCState *s1);
 226 static int find_constraint(ASMOperand *operands, int nb_operands,
 227                            const char *name, const char **pp);
 228
 229 static int tcc_assemble(TCCState *s1, int do_preprocess);
 230 #endif
 231
 232 static void asm_instr(void);
 233 static void asm_global_instr(void);
 234
 235 /********************************************************/
 236 /* global variables */
 237
 238 #ifdef TCC_TARGET_I386
 239 #include "i386-gen.c"
 240 #endif
 241
 242 #ifdef TCC_TARGET_ARM
 243 #include "arm-gen.c"
 244 #endif
 245
 246 #ifdef TCC_TARGET_C67
 247 #include "c67-gen.c"
 248 #endif
 249
 250 #ifdef TCC_TARGET_X86_64
 251 #include "x86_64-gen.c"
 252 #endif
 253
 254 #ifdef CONFIG_TCC_STATIC
 255
 256 #define RTLD_LAZY       0x001
 257 #define RTLD_NOW        0x002
 258 #define RTLD_GLOBAL     0x100
 259 #define RTLD_DEFAULT    NULL
 260
 261 /* dummy function for profiling */
 262 void *dlopen(const char *filename, int flag)
 263 {
 264     return NULL;
 265 }
 266
 267 void dlclose(void *p)
 268 {
 269 }
 270
 271 const char *dlerror(void)
 272 {
 273     return "error";
 274 }
 275
 276 typedef struct TCCSyms {
 277     char *str;
 278     void *ptr;
 279 } TCCSyms;
 280
 281 #define TCCSYM(a) { #a, &a, },
 282
 283 /* add the symbol you want here if no dynamic linking is done */
 284 static TCCSyms tcc_syms[] = {
 285 #if !defined(CONFIG_TCCBOOT)
 286     TCCSYM(printf)
 287     TCCSYM(fprintf)
 288     TCCSYM(fopen)
 289     TCCSYM(fclose)
 290 #endif
 291     { NULL, NULL },
 292 };
 293
 294 void *resolve_sym(TCCState *s1, const char *symbol, int type)
 295 {
 296     TCCSyms *p;
 297     p = tcc_syms;
 298     while (p->str != NULL) {
 299         if (!strcmp(p->str, symbol))
 300             return p->ptr;
 301         p++;
 302     }
 303     return NULL;
 304 }
 305
 306 #elif !defined(_WIN32)
 307
 308 #include <dlfcn.h>
 309
 310 void *resolve_sym(TCCState *s1, const char *sym, int type)
 311 {
 312     return dlsym(RTLD_DEFAULT, sym);
 313 }
 314
 315 #endif
 316
 317 /********************************************************/
 318
 319 /* we use our own 'finite' function to avoid potential problems with
 320    non standard math libs */
 321 /* XXX: endianness dependent */
 322 int ieee_finite(double d)
 323 {
 324     int *p = (int *)&d;
 325     return ((unsigned)((p[1] | 0x800fffff) + 1)) >> 31;
 326 }
 327
 328 /* copy a string and truncate it. */
 329 char *pstrcpy(char *buf, int buf_size, const char *s)
 330 {
 331     char *q, *q_end;
 332     int c;
 333
 334     if (buf_size > 0) {
 335         q = buf;
 336         q_end = buf + buf_size - 1;
 337         while (q < q_end) {
 338             c = *s++;
 339             if (c == '\0')
 340                 break;
 341             *q++ = c;
 342         }
 343         *q = '\0';
 344     }
 345     return buf;
 346 }
 347
 348 /* strcat and truncate. */
 349 char *pstrcat(char *buf, int buf_size, const char *s)
 350 {
 351     int len;
 352     len = strlen(buf);
 353     if (len < buf_size)
 354         pstrcpy(buf + len, buf_size - len, s);
 355     return buf;
 356 }
 357
 358 /* extract the basename of a file */
 359 char *tcc_basename(const char *name)
 360 {
 361     char *p = strchr(name, 0);
 362     while (p > name && !IS_PATHSEP(p[-1]))
 363         --p;
 364     return p;
 365 }
 366
 367 char *tcc_fileextension (const char *name)
 368 {
 369     char *b = tcc_basename(name);
 370     char *e = strrchr(b, '.');
 371     return e ? e : strchr(b, 0);
 372 }
 373
 374 #ifdef _WIN32
 375 char *normalize_slashes(char *path)
 376 {
 377     char *p;
 378     for (p = path; *p; ++p)
 379         if (*p == '\\')
 380             *p = '/';
 381     return path;
 382 }
 383
 384 void tcc_set_lib_path_w32(TCCState *s)
 385 {
 386     /* on win32, we suppose the lib and includes are at the location
 387        of 'tcc.exe' */
 388     char path[1024], *p;
 389     GetModuleFileNameA(NULL, path, sizeof path);
 390     p = tcc_basename(normalize_slashes(strlwr(path)));
 391     if (p - 5 > path && 0 == strncmp(p - 5, "/bin/", 5))
 392         p -= 5;
 393     else if (p > path)
 394         p--;
 395     *p = 0;
 396     tcc_set_lib_path(s, path);
 397 }
 398 #endif
 399
 400 void set_pages_executable(void *ptr, unsigned long length)
 401 {
 402 #ifdef _WIN32
 403     unsigned long old_protect;
 404     VirtualProtect(ptr, length, PAGE_EXECUTE_READWRITE, &old_protect);
 405 #else
 406     unsigned long start, end;
 407     start = (unsigned long)ptr & ~(PAGESIZE - 1);
 408     end = (unsigned long)ptr + length;
 409     end = (end + PAGESIZE - 1) & ~(PAGESIZE - 1);
 410     mprotect((void *)start, end - start, PROT_READ | PROT_WRITE | PROT_EXEC);
 411 #endif
 412 }
 413
 414 /* memory management */
 415 #ifdef MEM_DEBUG
 416 int mem_cur_size;
 417 int mem_max_size;
 418 unsigned malloc_usable_size(void*);
 419 #endif
 420
 421 void tcc_free(void *ptr)
 422 {
 423 #ifdef MEM_DEBUG
 424     mem_cur_size -= malloc_usable_size(ptr);
 425 #endif
 426     free(ptr);
 427 }
 428
 429 void *tcc_malloc(unsigned long size)
 430 {
 431     void *ptr;
 432     ptr = malloc(size);
 433     if (!ptr && size)
 434         error("memory full");
 435 #ifdef MEM_DEBUG
 436     mem_cur_size += malloc_usable_size(ptr);
 437     if (mem_cur_size > mem_max_size)
 438         mem_max_size = mem_cur_size;
 439 #endif
 440     return ptr;
 441 }
 442
 443 void *tcc_mallocz(unsigned long size)
 444 {
 445     void *ptr;
 446     ptr = tcc_malloc(size);
 447     memset(ptr, 0, size);
 448     return ptr;
 449 }
 450
 451 void *tcc_realloc(void *ptr, unsigned long size)
 452 {
 453     void *ptr1;
 454 #ifdef MEM_DEBUG
 455     mem_cur_size -= malloc_usable_size(ptr);
 456 #endif
 457     ptr1 = realloc(ptr, size);
 458 #ifdef MEM_DEBUG
 459     /* NOTE: count not correct if alloc error, but not critical */
 460     mem_cur_size += malloc_usable_size(ptr1);
 461     if (mem_cur_size > mem_max_size)
 462         mem_max_size = mem_cur_size;
 463 #endif
 464     return ptr1;
 465 }
 466
 467 char *tcc_strdup(const char *str)
 468 {
 469     char *ptr;
 470     ptr = tcc_malloc(strlen(str) + 1);
 471     strcpy(ptr, str);
 472     return ptr;
 473 }
 474
 475 #define free(p) use_tcc_free(p)
 476 #define malloc(s) use_tcc_malloc(s)
 477 #define realloc(p, s) use_tcc_realloc(p, s)
 478
 479 void dynarray_add(void ***ptab, int *nb_ptr, void *data)
 480 {
 481     int nb, nb_alloc;
 482     void **pp;
 483
 484     nb = *nb_ptr;
 485     pp = *ptab;
 486     /* every power of two we double array size */
 487     if ((nb & (nb - 1)) == 0) {
 488         if (!nb)
 489             nb_alloc = 1;
 490         else
 491             nb_alloc = nb * 2;
 492         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 493         if (!pp)
 494             error("memory full");
 495         *ptab = pp;
 496     }
 497     pp[nb++] = data;
 498     *nb_ptr = nb;
 499 }
 500
 501 void dynarray_reset(void *pp, int *n)
 502 {
 503     void **p;
 504     for (p = *(void***)pp; *n; ++p, --*n)
 505         if (*p)
 506             tcc_free(*p);
 507     tcc_free(*(void**)pp);
 508     *(void**)pp = NULL;
 509 }
 510
 511 /* symbol allocator */
 512 static Sym *__sym_malloc(void)
 513 {
 514     Sym *sym_pool, *sym, *last_sym;
 515     int i;
 516
 517     sym_pool = tcc_malloc(SYM_POOL_NB * sizeof(Sym));
 518     dynarray_add(&sym_pools, &nb_sym_pools, sym_pool);
 519
 520     last_sym = sym_free_first;
 521     sym = sym_pool;
 522     for(i = 0; i < SYM_POOL_NB; i++) {
 523         sym->next = last_sym;
 524         last_sym = sym;
 525         sym++;
 526     }
 527     sym_free_first = last_sym;
 528     return last_sym;
 529 }
 530
 531 static inline Sym *sym_malloc(void)
 532 {
 533     Sym *sym;
 534     sym = sym_free_first;
 535     if (!sym)
 536         sym = __sym_malloc();
 537     sym_free_first = sym->next;
 538     return sym;
 539 }
 540
 541 static inline void sym_free(Sym *sym)
 542 {
 543     sym->next = sym_free_first;
 544     sym_free_first = sym;
 545 }
 546
 547 Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags)
 548 {
 549     Section *sec;
 550
 551     sec = tcc_mallocz(sizeof(Section) + strlen(name));
 552     strcpy(sec->name, name);
 553     sec->sh_type = sh_type;
 554     sec->sh_flags = sh_flags;
 555     switch(sh_type) {
 556     case SHT_HASH:
 557     case SHT_REL:
 558     case SHT_RELA:
 559     case SHT_DYNSYM:
 560     case SHT_SYMTAB:
 561     case SHT_DYNAMIC:
 562         sec->sh_addralign = 4;
 563         break;
 564     case SHT_STRTAB:
 565         sec->sh_addralign = 1;
 566         break;
 567     default:
 568         sec->sh_addralign = 32; /* default conservative alignment */
 569         break;
 570     }
 571
 572     if (sh_flags & SHF_PRIVATE) {
 573         dynarray_add((void ***)&s1->priv_sections, &s1->nb_priv_sections, sec);
 574     } else {
 575         sec->sh_num = s1->nb_sections;
 576         dynarray_add((void ***)&s1->sections, &s1->nb_sections, sec);
 577     }
 578
 579     return sec;
 580 }
 581
 582 static void free_section(Section *s)
 583 {
 584     tcc_free(s->data);
 585 }
 586
 587 /* realloc section and set its content to zero */
 588 static void section_realloc(Section *sec, unsigned long new_size)
 589 {
 590     unsigned long size;
 591     unsigned char *data;
 592
 593     size = sec->data_allocated;
 594     if (size == 0)
 595         size = 1;
 596     while (size < new_size)
 597         size = size * 2;
 598     data = tcc_realloc(sec->data, size);
 599     if (!data)
 600         error("memory full");
 601     memset(data + sec->data_allocated, 0, size - sec->data_allocated);
 602     sec->data = data;
 603     sec->data_allocated = size;
 604 }
 605
 606 /* reserve at least 'size' bytes in section 'sec' from
 607    sec->data_offset. */
 608 static void *section_ptr_add(Section *sec, unsigned long size)
 609 {
 610     unsigned long offset, offset1;
 611
 612     offset = sec->data_offset;
 613     offset1 = offset + size;
 614     if (offset1 > sec->data_allocated)
 615         section_realloc(sec, offset1);
 616     sec->data_offset = offset1;
 617     return sec->data + offset;
 618 }
 619
 620 /* return a reference to a section, and create it if it does not
 621    exists */
 622 Section *find_section(TCCState *s1, const char *name)
 623 {
 624     Section *sec;
 625     int i;
 626     for(i = 1; i < s1->nb_sections; i++) {
 627         sec = s1->sections[i];
 628         if (!strcmp(name, sec->name))
 629             return sec;
 630     }
 631     /* sections are created as PROGBITS */
 632     return new_section(s1, name, SHT_PROGBITS, SHF_ALLOC);
 633 }
 634
 635 /* update sym->c so that it points to an external symbol in section
 636    'section' with value 'value' */
 637 static void put_extern_sym2(Sym *sym, Section *section,
 638                             unsigned long value, unsigned long size,
 639                             int can_add_underscore)
 640 {
 641     int sym_type, sym_bind, sh_num, info, other, attr;
 642     ElfW(Sym) *esym;
 643     const char *name;
 644     char buf1[256];
 645
 646     if (section == NULL)
 647         sh_num = SHN_UNDEF;
 648     else if (section == SECTION_ABS)
 649         sh_num = SHN_ABS;
 650     else
 651         sh_num = section->sh_num;
 652
 653     other = attr = 0;
 654
 655     if ((sym->type.t & VT_BTYPE) == VT_FUNC) {
 656         sym_type = STT_FUNC;
 657 #ifdef TCC_TARGET_PE
 658         if (sym->type.ref)
 659             attr = sym->type.ref->r;
 660         if (FUNC_EXPORT(attr))
 661             other |= 1;
 662         if (FUNC_CALL(attr) == FUNC_STDCALL)
 663             other |= 2;
 664 #endif
 665     } else {
 666         sym_type = STT_OBJECT;
 667     }
 668
 669     if (sym->type.t & VT_STATIC)
 670         sym_bind = STB_LOCAL;
 671     else
 672         sym_bind = STB_GLOBAL;
 673
 674     if (!sym->c) {
 675         name = get_tok_str(sym->v, NULL);
 676 #ifdef CONFIG_TCC_BCHECK
 677         if (tcc_state->do_bounds_check) {
 678             char buf[32];
 679
 680             /* XXX: avoid doing that for statics ? */
 681             /* if bound checking is activated, we change some function
 682                names by adding the "__bound" prefix */
 683             switch(sym->v) {
 684 #if 0
 685             /* XXX: we rely only on malloc hooks */
 686             case TOK_malloc:
 687             case TOK_free:
 688             case TOK_realloc:
 689             case TOK_memalign:
 690             case TOK_calloc:
 691 #endif
 692             case TOK_memcpy:
 693             case TOK_memmove:
 694             case TOK_memset:
 695             case TOK_strlen:
 696             case TOK_strcpy:
 697             case TOK__alloca:
 698                 strcpy(buf, "__bound_");
 699                 strcat(buf, name);
 700                 name = buf;
 701                 break;
 702             }
 703         }
 704 #endif
 705
 706 #ifdef TCC_TARGET_PE
 707         if ((other & 2) && can_add_underscore) {
 708             sprintf(buf1, "_%s@%d", name, FUNC_ARGS(attr));
 709             name = buf1;
 710         } else
 711 #endif
 712         if (tcc_state->leading_underscore && can_add_underscore) {
 713             buf1[0] = '_';
 714             pstrcpy(buf1 + 1, sizeof(buf1) - 1, name);
 715             name = buf1;
 716         }
 717         info = ELFW(ST_INFO)(sym_bind, sym_type);
 718         sym->c = add_elf_sym(symtab_section, value, size, info, other, sh_num, name);
 719     } else {
 720         esym = &((ElfW(Sym) *)symtab_section->data)[sym->c];
 721         esym->st_value = value;
 722         esym->st_size = size;
 723         esym->st_shndx = sh_num;
 724         esym->st_other |= other;
 725     }
 726 }
 727
 728 static void put_extern_sym(Sym *sym, Section *section,
 729                            unsigned long value, unsigned long size)
 730 {
 731     put_extern_sym2(sym, section, value, size, 1);
 732 }
 733
 734 /* add a new relocation entry to symbol 'sym' in section 's' */
 735 static void greloc(Section *s, Sym *sym, unsigned long offset, int type)
 736 {
 737     if (!sym->c)
 738         put_extern_sym(sym, NULL, 0, 0);
 739     /* now we can add ELF relocation info */
 740     put_elf_reloc(symtab_section, s, offset, type, sym->c);
 741 }
 742
 743 static inline int isid(int c)
 744 {
 745     return (c >= 'a' && c <= 'z') ||
 746         (c >= 'A' && c <= 'Z') ||
 747         c == '_';
 748 }
 749
 750 static inline int isnum(int c)
 751 {
 752     return c >= '0' && c <= '9';
 753 }
 754
 755 static inline int isoct(int c)
 756 {
 757     return c >= '0' && c <= '7';
 758 }
 759
 760 static inline int toup(int c)
 761 {
 762     if (c >= 'a' && c <= 'z')
 763         return c - 'a' + 'A';
 764     else
 765         return c;
 766 }
 767
 768 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 769 {
 770     int len;
 771     len = strlen(buf);
 772     vsnprintf(buf + len, buf_size - len, fmt, ap);
 773 }
 774
 775 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 776 {
 777     va_list ap;
 778     va_start(ap, fmt);
 779     strcat_vprintf(buf, buf_size, fmt, ap);
 780     va_end(ap);
 781 }
 782
 783 void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 784 {
 785     char buf[2048];
 786     BufferedFile **f;
 787
 788     buf[0] = '\0';
 789     if (file) {
 790         for(f = s1->include_stack; f < s1->include_stack_ptr; f++)
 791             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 792                           (*f)->filename, (*f)->line_num);
 793         if (file->line_num > 0) {
 794             strcat_printf(buf, sizeof(buf),
 795                           "%s:%d: ", file->filename, file->line_num);
 796         } else {
 797             strcat_printf(buf, sizeof(buf),
 798                           "%s: ", file->filename);
 799         }
 800     } else {
 801         strcat_printf(buf, sizeof(buf),
 802                       "tcc: ");
 803     }
 804     if (is_warning)
 805         strcat_printf(buf, sizeof(buf), "warning: ");
 806     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 807
 808     if (!s1->error_func) {
 809         /* default case: stderr */
 810         fprintf(stderr, "%s\n", buf);
 811     } else {
 812         s1->error_func(s1->error_opaque, buf);
 813     }
 814     if (!is_warning || s1->warn_error)
 815         s1->nb_errors++;
 816 }
 817
 818 void tcc_set_error_func(TCCState *s, void *error_opaque,
 819                         void (*error_func)(void *opaque, const char *msg))
 820 {
 821     s->error_opaque = error_opaque;
 822     s->error_func = error_func;
 823 }
 824
 825 /* error without aborting current compilation */
 826 void error_noabort(const char *fmt, ...)
 827 {
 828     TCCState *s1 = tcc_state;
 829     va_list ap;
 830
 831     va_start(ap, fmt);
 832     error1(s1, 0, fmt, ap);
 833     va_end(ap);
 834 }
 835
 836 void error(const char *fmt, ...)
 837 {
 838     TCCState *s1 = tcc_state;
 839     va_list ap;
 840
 841     va_start(ap, fmt);
 842     error1(s1, 0, fmt, ap);
 843     va_end(ap);
 844     /* better than nothing: in some cases, we accept to handle errors */
 845     if (s1->error_set_jmp_enabled) {
 846         longjmp(s1->error_jmp_buf, 1);
 847     } else {
 848         /* XXX: eliminate this someday */
 849         exit(1);
 850     }
 851 }
 852
 853 void expect(const char *msg)
 854 {
 855     error("%s expected", msg);
 856 }
 857
 858 void warning(const char *fmt, ...)
 859 {
 860     TCCState *s1 = tcc_state;
 861     va_list ap;
 862
 863     if (s1->warn_none)
 864         return;
 865
 866     va_start(ap, fmt);
 867     error1(s1, 1, fmt, ap);
 868     va_end(ap);
 869 }
 870
 871 void skip(int c)
 872 {
 873     if (tok != c)
 874         error("'%c' expected", c);
 875     next();
 876 }
 877
 878 static void test_lvalue(void)
 879 {
 880     if (!(vtop->r & VT_LVAL))
 881         expect("lvalue");
 882 }
 883
 884 /* CString handling */
 885
 886 static void cstr_realloc(CString *cstr, int new_size)
 887 {
 888     int size;
 889     void *data;
 890
 891     size = cstr->size_allocated;
 892     if (size == 0)
 893         size = 8; /* no need to allocate a too small first string */
 894     while (size < new_size)
 895         size = size * 2;
 896     data = tcc_realloc(cstr->data_allocated, size);
 897     if (!data)
 898         error("memory full");
 899     cstr->data_allocated = data;
 900     cstr->size_allocated = size;
 901     cstr->data = data;
 902 }
 903
 904 /* add a byte */
 905 static inline void cstr_ccat(CString *cstr, int ch)
 906 {
 907     int size;
 908     size = cstr->size + 1;
 909     if (size > cstr->size_allocated)
 910         cstr_realloc(cstr, size);
 911     ((unsigned char *)cstr->data)[size - 1] = ch;
 912     cstr->size = size;
 913 }
 914
 915 static void cstr_cat(CString *cstr, const char *str)
 916 {
 917     int c;
 918     for(;;) {
 919         c = *str;
 920         if (c == '\0')
 921             break;
 922         cstr_ccat(cstr, c);
 923         str++;
 924     }
 925 }
 926
 927 /* add a wide char */
 928 static void cstr_wccat(CString *cstr, int ch)
 929 {
 930     int size;
 931     size = cstr->size + sizeof(nwchar_t);
 932     if (size > cstr->size_allocated)
 933         cstr_realloc(cstr, size);
 934     *(nwchar_t *)(((unsigned char *)cstr->data) + size - sizeof(nwchar_t)) = ch;
 935     cstr->size = size;
 936 }
 937
 938 static void cstr_new(CString *cstr)
 939 {
 940     memset(cstr, 0, sizeof(CString));
 941 }
 942
 943 /* free string and reset it to NULL */
 944 static void cstr_free(CString *cstr)
 945 {
 946     tcc_free(cstr->data_allocated);
 947     cstr_new(cstr);
 948 }
 949
 950 #define cstr_reset(cstr) cstr_free(cstr)
 951
 952 /* XXX: unicode ? */
 953 static void add_char(CString *cstr, int c)
 954 {
 955     if (c == '\'' || c == '\"' || c == '\\') {
 956         /* XXX: could be more precise if char or string */
 957         cstr_ccat(cstr, '\\');
 958     }
 959     if (c >= 32 && c <= 126) {
 960         cstr_ccat(cstr, c);
 961     } else {
 962         cstr_ccat(cstr, '\\');
 963         if (c == '\n') {
 964             cstr_ccat(cstr, 'n');
 965         } else {
 966             cstr_ccat(cstr, '0' + ((c >> 6) & 7));
 967             cstr_ccat(cstr, '0' + ((c >> 3) & 7));
 968             cstr_ccat(cstr, '0' + (c & 7));
 969         }
 970     }
 971 }
 972
 973 /* push, without hashing */
 974 static Sym *sym_push2(Sym **ps, int v, int t, long c)
 975 {
 976     Sym *s;
 977     s = sym_malloc();
 978     s->v = v;
 979     s->type.t = t;
 980     s->c = c;
 981     s->next = NULL;
 982     /* add in stack */
 983     s->prev = *ps;
 984     *ps = s;
 985     return s;
 986 }
 987
 988 /* find a symbol and return its associated structure. 's' is the top
 989    of the symbol stack */
 990 static Sym *sym_find2(Sym *s, int v)
 991 {
 992     while (s) {
 993         if (s->v == v)
 994             return s;
 995         s = s->prev;
 996     }
 997     return NULL;
 998 }
 999
1000 /* structure lookup */
1001 static inline Sym *struct_find(int v)
1002 {
1003     v -= TOK_IDENT;
1004     if ((unsigned)v >= (unsigned)(tok_ident - TOK_IDENT))
1005         return NULL;
1006     return table_ident[v]->sym_struct;
1007 }
1008
1009 /* find an identifier */
1010 static inline Sym *sym_find(int v)
1011 {
1012     v -= TOK_IDENT;
1013     if ((unsigned)v >= (unsigned)(tok_ident - TOK_IDENT))
1014         return NULL;
1015     return table_ident[v]->sym_identifier;
1016 }
1017
1018 /* push a given symbol on the symbol stack */
1019 static Sym *sym_push(int v, CType *type, int r, int c)
1020 {
1021     Sym *s, **ps;
1022     TokenSym *ts;
1023
1024     if (local_stack)
1025         ps = &local_stack;
1026     else
1027         ps = &global_stack;
1028     s = sym_push2(ps, v, type->t, c);
1029     s->type.ref = type->ref;
1030     s->r = r;
1031     /* don't record fields or anonymous symbols */
1032     /* XXX: simplify */
1033     if (!(v & SYM_FIELD) && (v & ~SYM_STRUCT) < SYM_FIRST_ANOM) {
1034         /* record symbol in token array */
1035         ts = table_ident[(v & ~SYM_STRUCT) - TOK_IDENT];
1036         if (v & SYM_STRUCT)
1037             ps = &ts->sym_struct;
1038         else
1039             ps = &ts->sym_identifier;
1040         s->prev_tok = *ps;
1041         *ps = s;
1042     }
1043     return s;
1044 }
1045
1046 /* push a global identifier */
1047 static Sym *global_identifier_push(int v, int t, int c)
1048 {
1049     Sym *s, **ps;
1050     s = sym_push2(&global_stack, v, t, c);
1051     /* don't record anonymous symbol */
1052     if (v < SYM_FIRST_ANOM) {
1053         ps = &table_ident[v - TOK_IDENT]->sym_identifier;
1054         /* modify the top most local identifier, so that
1055            sym_identifier will point to 's' when popped */
1056         while (*ps != NULL)
1057             ps = &(*ps)->prev_tok;
1058         s->prev_tok = NULL;
1059         *ps = s;
1060     }
1061     return s;
1062 }
1063
1064 /* pop symbols until top reaches 'b' */
1065 static void sym_pop(Sym **ptop, Sym *b)
1066 {
1067     Sym *s, *ss, **ps;
1068     TokenSym *ts;
1069     int v;
1070
1071     s = *ptop;
1072     while(s != b) {
1073         ss = s->prev;
1074         v = s->v;
1075         /* remove symbol in token array */
1076         /* XXX: simplify */
1077         if (!(v & SYM_FIELD) && (v & ~SYM_STRUCT) < SYM_FIRST_ANOM) {
1078             ts = table_ident[(v & ~SYM_STRUCT) - TOK_IDENT];
1079             if (v & SYM_STRUCT)
1080                 ps = &ts->sym_struct;
1081             else
1082                 ps = &ts->sym_identifier;
1083             *ps = s->prev_tok;
1084         }
1085         sym_free(s);
1086         s = ss;
1087     }
1088     *ptop = b;
1089 }
1090
1091 /* I/O layer */
1092
1093 BufferedFile *tcc_open(TCCState *s1, const char *filename)
1094 {
1095     int fd;
1096     BufferedFile *bf;
1097
1098     if (strcmp(filename, "-") == 0)
1099         fd = 0, filename = "stdin";
1100     else
1101         fd = open(filename, O_RDONLY | O_BINARY);
1102     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
1103         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
1104                (s1->include_stack_ptr - s1->include_stack), "", filename);
1105     if (fd < 0)
1106         return NULL;
1107     bf = tcc_malloc(sizeof(BufferedFile));
1108     bf->fd = fd;
1109     bf->buf_ptr = bf->buffer;
1110     bf->buf_end = bf->buffer;
1111     bf->buffer[0] = CH_EOB; /* put eob symbol */
1112     pstrcpy(bf->filename, sizeof(bf->filename), filename);
1113 #ifdef _WIN32
1114     normalize_slashes(bf->filename);
1115 #endif
1116     bf->line_num = 1;
1117     bf->ifndef_macro = 0;
1118     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
1119     //    printf("opening '%s'\n", filename);
1120     return bf;
1121 }
1122
1123 void tcc_close(BufferedFile *bf)
1124 {
1125     total_lines += bf->line_num;
1126     close(bf->fd);
1127     tcc_free(bf);
1128 }
1129
1130 #include "tccpp.c"
1131 #include "tccgen.c"
1132
1133
1134 /* compile the C file opened in 'file'. Return non zero if errors. */
1135 static int tcc_compile(TCCState *s1)
1136 {
1137     Sym *define_start;
1138     char buf[512];
1139     volatile int section_sym;
1140
1141 #ifdef INC_DEBUG
1142     printf("%s: **** new file\n", file->filename);
1143 #endif
1144     preprocess_init(s1);
1145
1146     cur_text_section = NULL;
1147     funcname = "";
1148     anon_sym = SYM_FIRST_ANOM;
1149
1150     /* file info: full path + filename */
1151     section_sym = 0; /* avoid warning */
1152     if (s1->do_debug) {
1153         section_sym = put_elf_sym(symtab_section, 0, 0,
1154                                   ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
1155                                   text_section->sh_num, NULL);
1156         getcwd(buf, sizeof(buf));
1157 #ifdef _WIN32
1158         normalize_slashes(buf);
1159 #endif
1160         pstrcat(buf, sizeof(buf), "/");
1161         put_stabs_r(buf, N_SO, 0, 0,
1162                     text_section->data_offset, text_section, section_sym);
1163         put_stabs_r(file->filename, N_SO, 0, 0,
1164                     text_section->data_offset, text_section, section_sym);
1165     }
1166     /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
1167        symbols can be safely used */
1168     put_elf_sym(symtab_section, 0, 0,
1169                 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
1170                 SHN_ABS, file->filename);
1171
1172     /* define some often used types */
1173     int_type.t = VT_INT;
1174
1175     char_pointer_type.t = VT_BYTE;
1176     mk_pointer(&char_pointer_type);
1177
1178     func_old_type.t = VT_FUNC;
1179     func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
1180
1181 #if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP)
1182     float_type.t = VT_FLOAT;
1183     double_type.t = VT_DOUBLE;
1184
1185     func_float_type.t = VT_FUNC;
1186     func_float_type.ref = sym_push(SYM_FIELD, &float_type, FUNC_CDECL, FUNC_OLD);
1187     func_double_type.t = VT_FUNC;
1188     func_double_type.ref = sym_push(SYM_FIELD, &double_type, FUNC_CDECL, FUNC_OLD);
1189 #endif
1190
1191 #if 0
1192     /* define 'void *alloca(unsigned int)' builtin function */
1193     {
1194         Sym *s1;
1195
1196         p = anon_sym++;
1197         sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
1198         s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
1199         s1->next = NULL;
1200         sym->next = s1;
1201         sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
1202     }
1203 #endif
1204
1205     define_start = define_stack;
1206     nocode_wanted = 1;
1207
1208     if (setjmp(s1->error_jmp_buf) == 0) {
1209         s1->nb_errors = 0;
1210         s1->error_set_jmp_enabled = 1;
1211
1212         ch = file->buf_ptr[0];
1213         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
1214         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
1215         next();
1216         decl(VT_CONST);
1217         if (tok != TOK_EOF)
1218             expect("declaration");
1219
1220         /* end of translation unit info */
1221         if (s1->do_debug) {
1222             put_stabs_r(NULL, N_SO, 0, 0,
1223                         text_section->data_offset, text_section, section_sym);
1224         }
1225     }
1226     s1->error_set_jmp_enabled = 0;
1227
1228     /* reset define stack, but leave -Dsymbols (may be incorrect if
1229        they are undefined) */
1230     free_defines(define_start);
1231
1232     gen_inline_functions();
1233
1234     sym_pop(&global_stack, NULL);
1235     sym_pop(&local_stack, NULL);
1236
1237     return s1->nb_errors != 0 ? -1 : 0;
1238 }
1239
1240 int tcc_compile_string(TCCState *s, const char *str)
1241 {
1242     BufferedFile bf1, *bf = &bf1;
1243     int ret, len;
1244     char *buf;
1245
1246     /* init file structure */
1247     bf->fd = -1;
1248     /* XXX: avoid copying */
1249     len = strlen(str);
1250     buf = tcc_malloc(len + 1);
1251     if (!buf)
1252         return -1;
1253     memcpy(buf, str, len);
1254     buf[len] = CH_EOB;
1255     bf->buf_ptr = buf;
1256     bf->buf_end = buf + len;
1257     pstrcpy(bf->filename, sizeof(bf->filename), "<string>");
1258     bf->line_num = 1;
1259     file = bf;
1260     ret = tcc_compile(s);
1261     file = NULL;
1262     tcc_free(buf);
1263
1264     /* currently, no need to close */
1265     return ret;
1266 }
1267
1268 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
1269 void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
1270 {
1271     BufferedFile bf1, *bf = &bf1;
1272
1273     pstrcpy(bf->buffer, IO_BUF_SIZE, sym);
1274     pstrcat(bf->buffer, IO_BUF_SIZE, " ");
1275     /* default value */
1276     if (!value)
1277         value = "1";
1278     pstrcat(bf->buffer, IO_BUF_SIZE, value);
1279
1280     /* init file structure */
1281     bf->fd = -1;
1282     bf->buf_ptr = bf->buffer;
1283     bf->buf_end = bf->buffer + strlen(bf->buffer);
1284     *bf->buf_end = CH_EOB;
1285     bf->filename[0] = '\0';
1286     bf->line_num = 1;
1287     file = bf;
1288
1289     s1->include_stack_ptr = s1->include_stack;
1290
1291     /* parse with define parser */
1292     ch = file->buf_ptr[0];
1293     next_nomacro();
1294     parse_define();
1295     file = NULL;
1296 }
1297
1298 /* undefine a preprocessor symbol */
1299 void tcc_undefine_symbol(TCCState *s1, const char *sym)
1300 {
1301     TokenSym *ts;
1302     Sym *s;
1303     ts = tok_alloc(sym, strlen(sym));
1304     s = define_find(ts->tok);
1305     /* undefine symbol by putting an invalid name */
1306     if (s)
1307         define_undef(s);
1308 }
1309
1310 #ifdef CONFIG_TCC_ASM
1311
1312 #ifdef TCC_TARGET_I386
1313 #include "i386-asm.c"
1314 #endif
1315 #include "tccasm.c"
1316
1317 #else
1318 static void asm_instr(void)
1319 {
1320     error("inline asm() not supported");
1321 }
1322 static void asm_global_instr(void)
1323 {
1324     error("inline asm() not supported");
1325 }
1326 #endif
1327
1328 #include "tccelf.c"
1329
1330 #ifdef TCC_TARGET_COFF
1331 #include "tcccoff.c"
1332 #endif
1333
1334 #ifdef TCC_TARGET_PE
1335 #include "tccpe.c"
1336 #endif
1337
1338 #ifdef CONFIG_TCC_BACKTRACE
1339 /* print the position in the source file of PC value 'pc' by reading
1340    the stabs debug information */
1341 static void rt_printline(unsigned long wanted_pc)
1342 {
1343     Stab_Sym *sym, *sym_end;
1344     char func_name[128], last_func_name[128];
1345     unsigned long func_addr, last_pc, pc;
1346     const char *incl_files[INCLUDE_STACK_SIZE];
1347     int incl_index, len, last_line_num, i;
1348     const char *str, *p;
1349
1350     fprintf(stderr, "0x%08lx:", wanted_pc);
1351
1352     func_name[0] = '\0';
1353     func_addr = 0;
1354     incl_index = 0;
1355     last_func_name[0] = '\0';
1356     last_pc = 0xffffffff;
1357     last_line_num = 1;
1358     sym = (Stab_Sym *)stab_section->data + 1;
1359     sym_end = (Stab_Sym *)(stab_section->data + stab_section->data_offset);
1360     while (sym < sym_end) {
1361         switch(sym->n_type) {
1362             /* function start or end */
1363         case N_FUN:
1364             if (sym->n_strx == 0) {
1365                 /* we test if between last line and end of function */
1366                 pc = sym->n_value + func_addr;
1367                 if (wanted_pc >= last_pc && wanted_pc < pc)
1368                     goto found;
1369                 func_name[0] = '\0';
1370                 func_addr = 0;
1371             } else {
1372                 str = stabstr_section->data + sym->n_strx;
1373                 p = strchr(str, ':');
1374                 if (!p) {
1375                     pstrcpy(func_name, sizeof(func_name), str);
1376                 } else {
1377                     len = p - str;
1378                     if (len > sizeof(func_name) - 1)
1379                         len = sizeof(func_name) - 1;
1380                     memcpy(func_name, str, len);
1381                     func_name[len] = '\0';
1382                 }
1383                 func_addr = sym->n_value;
1384             }
1385             break;
1386             /* line number info */
1387         case N_SLINE:
1388             pc = sym->n_value + func_addr;
1389             if (wanted_pc >= last_pc && wanted_pc < pc)
1390                 goto found;
1391             last_pc = pc;
1392             last_line_num = sym->n_desc;
1393             /* XXX: slow! */
1394             strcpy(last_func_name, func_name);
1395             break;
1396             /* include files */
1397         case N_BINCL:
1398             str = stabstr_section->data + sym->n_strx;
1399         add_incl:
1400             if (incl_index < INCLUDE_STACK_SIZE) {
1401                 incl_files[incl_index++] = str;
1402             }
1403             break;
1404         case N_EINCL:
1405             if (incl_index > 1)
1406                 incl_index--;
1407             break;
1408         case N_SO:
1409             if (sym->n_strx == 0) {
1410                 incl_index = 0; /* end of translation unit */
1411             } else {
1412                 str = stabstr_section->data + sym->n_strx;
1413                 /* do not add path */
1414                 len = strlen(str);
1415                 if (len > 0 && str[len - 1] != '/')
1416                     goto add_incl;
1417             }
1418             break;
1419         }
1420         sym++;
1421     }
1422
1423     /* second pass: we try symtab symbols (no line number info) */
1424     incl_index = 0;
1425     {
1426         ElfW(Sym) *sym, *sym_end;
1427         int type;
1428
1429         sym_end = (ElfW(Sym) *)(symtab_section->data + symtab_section->data_offset);
1430         for(sym = (ElfW(Sym) *)symtab_section->data + 1;
1431             sym < sym_end;
1432             sym++) {
1433             type = ELFW(ST_TYPE)(sym->st_info);
1434             if (type == STT_FUNC) {
1435                 if (wanted_pc >= sym->st_value &&
1436                     wanted_pc < sym->st_value + sym->st_size) {
1437                     pstrcpy(last_func_name, sizeof(last_func_name),
1438                             strtab_section->data + sym->st_name);
1439                     goto found;
1440                 }
1441             }
1442         }
1443     }
1444     /* did not find any info: */
1445     fprintf(stderr, " ???\n");
1446     return;
1447  found:
1448     if (last_func_name[0] != '\0') {
1449         fprintf(stderr, " %s()", last_func_name);
1450     }
1451     if (incl_index > 0) {
1452         fprintf(stderr, " (%s:%d",
1453                 incl_files[incl_index - 1], last_line_num);
1454         for(i = incl_index - 2; i >= 0; i--)
1455             fprintf(stderr, ", included from %s", incl_files[i]);
1456         fprintf(stderr, ")");
1457     }
1458     fprintf(stderr, "\n");
1459 }
1460
1461 #ifdef __i386__
1462 /* fix for glibc 2.1 */
1463 #ifndef REG_EIP
1464 #define REG_EIP EIP
1465 #define REG_EBP EBP
1466 #endif
1467
1468 /* return the PC at frame level 'level'. Return non zero if not found */
1469 static int rt_get_caller_pc(unsigned long *paddr,
1470                             ucontext_t *uc, int level)
1471 {
1472     unsigned long fp;
1473     int i;
1474
1475     if (level == 0) {
1476 #if defined(__FreeBSD__)
1477         *paddr = uc->uc_mcontext.mc_eip;
1478 #elif defined(__dietlibc__)
1479         *paddr = uc->uc_mcontext.eip;
1480 #else
1481         *paddr = uc->uc_mcontext.gregs[REG_EIP];
1482 #endif
1483         return 0;
1484     } else {
1485 #if defined(__FreeBSD__)
1486         fp = uc->uc_mcontext.mc_ebp;
1487 #elif defined(__dietlibc__)
1488         fp = uc->uc_mcontext.ebp;
1489 #else
1490         fp = uc->uc_mcontext.gregs[REG_EBP];
1491 #endif
1492         for(i=1;i<level;i++) {
1493             /* XXX: check address validity with program info */
1494             if (fp <= 0x1000 || fp >= 0xc0000000)
1495                 return -1;
1496             fp = ((unsigned long *)fp)[0];
1497         }
1498         *paddr = ((unsigned long *)fp)[1];
1499         return 0;
1500     }
1501 }
1502 #elif defined(__x86_64__)
1503 /* return the PC at frame level 'level'. Return non zero if not found */
1504 static int rt_get_caller_pc(unsigned long *paddr,
1505                             ucontext_t *uc, int level)
1506 {
1507     unsigned long fp;
1508     int i;
1509
1510     if (level == 0) {
1511         /* XXX: only support linux */
1512         *paddr = uc->uc_mcontext.gregs[REG_RIP];
1513         return 0;
1514     } else {
1515         fp = uc->uc_mcontext.gregs[REG_RBP];
1516         for(i=1;i<level;i++) {
1517             /* XXX: check address validity with program info */
1518             if (fp <= 0x1000)
1519                 return -1;
1520             fp = ((unsigned long *)fp)[0];
1521         }
1522         *paddr = ((unsigned long *)fp)[1];
1523         return 0;
1524     }
1525 }
1526 #else
1527 #warning add arch specific rt_get_caller_pc()
1528 static int rt_get_caller_pc(unsigned long *paddr,
1529                             ucontext_t *uc, int level)
1530 {
1531     return -1;
1532 }
1533 #endif
1534
1535 /* emit a run time error at position 'pc' */
1536 void rt_error(ucontext_t *uc, const char *fmt, ...)
1537 {
1538     va_list ap;
1539     unsigned long pc;
1540     int i;
1541
1542     va_start(ap, fmt);
1543     fprintf(stderr, "Runtime error: ");
1544     vfprintf(stderr, fmt, ap);
1545     fprintf(stderr, "\n");
1546     for(i=0;i<num_callers;i++) {
1547         if (rt_get_caller_pc(&pc, uc, i) < 0)
1548             break;
1549         if (i == 0)
1550             fprintf(stderr, "at ");
1551         else
1552             fprintf(stderr, "by ");
1553         rt_printline(pc);
1554     }
1555     exit(255);
1556     va_end(ap);
1557 }
1558
1559 /* signal handler for fatal errors */
1560 static void sig_error(int signum, siginfo_t *siginf, void *puc)
1561 {
1562     ucontext_t *uc = puc;
1563
1564     switch(signum) {
1565     case SIGFPE:
1566         switch(siginf->si_code) {
1567         case FPE_INTDIV:
1568         case FPE_FLTDIV:
1569             rt_error(uc, "division by zero");
1570             break;
1571         default:
1572             rt_error(uc, "floating point exception");
1573             break;
1574         }
1575         break;
1576     case SIGBUS:
1577     case SIGSEGV:
1578         if (rt_bound_error_msg && *rt_bound_error_msg)
1579             rt_error(uc, *rt_bound_error_msg);
1580         else
1581             rt_error(uc, "dereferencing invalid pointer");
1582         break;
1583     case SIGILL:
1584         rt_error(uc, "illegal instruction");
1585         break;
1586     case SIGABRT:
1587         rt_error(uc, "abort() called");
1588         break;
1589     default:
1590         rt_error(uc, "caught signal %d", signum);
1591         break;
1592     }
1593     exit(255);
1594 }
1595
1596 #endif
1597
1598 /* copy code into memory passed in by the caller and do all relocations
1599    (needed before using tcc_get_symbol()).
1600    returns -1 on error and required size if ptr is NULL */
1601 int tcc_relocate(TCCState *s1, void *ptr)
1602 {
1603     Section *s;
1604     unsigned long offset, length, mem;
1605     int i;
1606
1607     if (0 == s1->runtime_added) {
1608         s1->runtime_added = 1;
1609         s1->nb_errors = 0;
1610 #ifdef TCC_TARGET_PE
1611         pe_add_runtime(s1);
1612         relocate_common_syms();
1613         tcc_add_linker_symbols(s1);
1614 #else
1615         tcc_add_runtime(s1);
1616         relocate_common_syms();
1617         tcc_add_linker_symbols(s1);
1618         build_got_entries(s1);
1619 #endif
1620     }
1621
1622     offset = 0, mem = (unsigned long)ptr;
1623     for(i = 1; i < s1->nb_sections; i++) {
1624         s = s1->sections[i];
1625         if (0 == (s->sh_flags & SHF_ALLOC))
1626             continue;
1627         length = s->data_offset;
1628         s->sh_addr = mem ? (mem + offset + 15) & ~15 : 0;
1629         offset = (offset + length + 15) & ~15;
1630     }
1631
1632     /* relocate symbols */
1633     relocate_syms(s1, 1);
1634     if (s1->nb_errors)
1635         return -1;
1636
1637 #ifdef TCC_TARGET_X86_64
1638     s1->runtime_plt_and_got_offset = 0;
1639     s1->runtime_plt_and_got = (char *)(mem + offset);
1640     /* double the size of the buffer for got and plt entries
1641        XXX: calculate exact size for them? */
1642     offset *= 2;
1643 #endif
1644
1645     if (0 == mem)
1646         return offset + 15;
1647
1648     /* relocate each section */
1649     for(i = 1; i < s1->nb_sections; i++) {
1650         s = s1->sections[i];
1651         if (s->reloc)
1652             relocate_section(s1, s);
1653     }
1654
1655     for(i = 1; i < s1->nb_sections; i++) {
1656         s = s1->sections[i];
1657         if (0 == (s->sh_flags & SHF_ALLOC))
1658             continue;
1659         length = s->data_offset;
1660         // printf("%-12s %08x %04x\n", s->name, s->sh_addr, length);
1661         ptr = (void*)s->sh_addr;
1662         if (NULL == s->data || s->sh_type == SHT_NOBITS)
1663             memset(ptr, 0, length);
1664         else
1665             memcpy(ptr, s->data, length);
1666         /* mark executable sections as executable in memory */
1667         if (s->sh_flags & SHF_EXECINSTR)
1668             set_pages_executable(ptr, length);
1669     }
1670 #ifdef TCC_TARGET_X86_64
1671     set_pages_executable(s1->runtime_plt_and_got,
1672                          s1->runtime_plt_and_got_offset);
1673 #endif
1674     return 0;
1675 }
1676
1677 /* launch the compiled program with the given arguments */
1678 int tcc_run(TCCState *s1, int argc, char **argv)
1679 {
1680     int (*prog_main)(int, char **);
1681     void *ptr;
1682     int ret;
1683
1684     ret = tcc_relocate(s1, NULL);
1685     if (ret < 0)
1686         return -1;
1687     ptr = tcc_malloc(ret);
1688     tcc_relocate(s1, ptr);
1689
1690     prog_main = tcc_get_symbol_err(s1, "main");
1691
1692     if (s1->do_debug) {
1693 #ifdef CONFIG_TCC_BACKTRACE
1694         struct sigaction sigact;
1695         /* install TCC signal handlers to print debug info on fatal
1696            runtime errors */
1697         sigact.sa_flags = SA_SIGINFO | SA_RESETHAND;
1698         sigact.sa_sigaction = sig_error;
1699         sigemptyset(&sigact.sa_mask);
1700         sigaction(SIGFPE, &sigact, NULL);
1701         sigaction(SIGILL, &sigact, NULL);
1702         sigaction(SIGSEGV, &sigact, NULL);
1703         sigaction(SIGBUS, &sigact, NULL);
1704         sigaction(SIGABRT, &sigact, NULL);
1705 #else
1706         error("debug mode not available");
1707 #endif
1708     }
1709
1710 #ifdef CONFIG_TCC_BCHECK
1711     if (s1->do_bounds_check) {
1712         void (*bound_init)(void);
1713
1714         /* set error function */
1715         rt_bound_error_msg = tcc_get_symbol_err(s1, "__bound_error_msg");
1716
1717         /* XXX: use .init section so that it also work in binary ? */
1718         bound_init = (void *)tcc_get_symbol_err(s1, "__bound_init");
1719         bound_init();
1720     }
1721 #endif
1722     ret = (*prog_main)(argc, argv);
1723     tcc_free(ptr);
1724     return ret;
1725 }
1726
1727 void tcc_memstats(void)
1728 {
1729 #ifdef MEM_DEBUG
1730     printf("memory in use: %d\n", mem_cur_size);
1731 #endif
1732 }
1733
1734 static void tcc_cleanup(void)
1735 {
1736     int i, n;
1737
1738     if (NULL == tcc_state)
1739         return;
1740     tcc_state = NULL;
1741
1742     /* free -D defines */
1743     free_defines(NULL);
1744
1745     /* free tokens */
1746     n = tok_ident - TOK_IDENT;
1747     for(i = 0; i < n; i++)
1748         tcc_free(table_ident[i]);
1749     tcc_free(table_ident);
1750
1751     /* free sym_pools */
1752     dynarray_reset(&sym_pools, &nb_sym_pools);
1753     /* string buffer */
1754     cstr_free(&tokcstr);
1755     /* reset symbol stack */
1756     sym_free_first = NULL;
1757     /* cleanup from error/setjmp */
1758     macro_ptr = NULL;
1759 }
1760
1761 TCCState *tcc_new(void)
1762 {
1763     TCCState *s;
1764
1765     tcc_cleanup();
1766
1767     s = tcc_mallocz(sizeof(TCCState));
1768     if (!s)
1769         return NULL;
1770     tcc_state = s;
1771     s->output_type = TCC_OUTPUT_MEMORY;
1772     s->tcc_lib_path = CONFIG_TCCDIR;
1773
1774     preprocess_new();
1775
1776     /* we add dummy defines for some special macros to speed up tests
1777        and to have working defined() */
1778     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
1779     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
1780     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
1781     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
1782
1783     /* standard defines */
1784     tcc_define_symbol(s, "__STDC__", NULL);
1785     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
1786 #if defined(TCC_TARGET_I386)
1787     tcc_define_symbol(s, "__i386__", NULL);
1788 #endif
1789 #if defined(TCC_TARGET_X86_64)
1790     tcc_define_symbol(s, "__x86_64__", NULL);
1791 #endif
1792 #if defined(TCC_TARGET_ARM)
1793     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
1794     tcc_define_symbol(s, "__arm_elf__", NULL);
1795     tcc_define_symbol(s, "__arm_elf", NULL);
1796     tcc_define_symbol(s, "arm_elf", NULL);
1797     tcc_define_symbol(s, "__arm__", NULL);
1798     tcc_define_symbol(s, "__arm", NULL);
1799     tcc_define_symbol(s, "arm", NULL);
1800     tcc_define_symbol(s, "__APCS_32__", NULL);
1801 #endif
1802 #ifdef TCC_TARGET_PE
1803     tcc_define_symbol(s, "_WIN32", NULL);
1804 #else
1805     tcc_define_symbol(s, "__unix__", NULL);
1806     tcc_define_symbol(s, "__unix", NULL);
1807 #if defined(__linux)
1808     tcc_define_symbol(s, "__linux__", NULL);
1809     tcc_define_symbol(s, "__linux", NULL);
1810 #endif
1811 #endif
1812     /* tiny C specific defines */
1813     tcc_define_symbol(s, "__TINYC__", NULL);
1814
1815     /* tiny C & gcc defines */
1816     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned int");
1817     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "int");
1818 #ifdef TCC_TARGET_PE
1819     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
1820 #else
1821     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
1822 #endif
1823
1824 #ifndef TCC_TARGET_PE
1825     /* default library paths */
1826     tcc_add_library_path(s, CONFIG_SYSROOT "/usr/local/lib");
1827     tcc_add_library_path(s, CONFIG_SYSROOT "/usr/lib");
1828     tcc_add_library_path(s, CONFIG_SYSROOT "/lib");
1829 #endif
1830
1831     /* no section zero */
1832     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
1833
1834     /* create standard sections */
1835     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
1836     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
1837     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
1838
1839     /* symbols are always generated for linking stage */
1840     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
1841                                 ".strtab",
1842                                 ".hashtab", SHF_PRIVATE);
1843     strtab_section = symtab_section->link;
1844
1845     /* private symbol table for dynamic symbols */
1846     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
1847                                       ".dynstrtab",
1848                                       ".dynhashtab", SHF_PRIVATE);
1849     s->alacarte_link = 1;
1850
1851 #ifdef CHAR_IS_UNSIGNED
1852     s->char_is_unsigned = 1;
1853 #endif
1854 #if defined(TCC_TARGET_PE) && 0
1855     /* XXX: currently the PE linker is not ready to support that */
1856     s->leading_underscore = 1;
1857 #endif
1858     return s;
1859 }
1860
1861 void tcc_delete(TCCState *s1)
1862 {
1863     int i;
1864
1865     tcc_cleanup();
1866
1867     /* free all sections */
1868     for(i = 1; i < s1->nb_sections; i++)
1869         free_section(s1->sections[i]);
1870     dynarray_reset(&s1->sections, &s1->nb_sections);
1871
1872     for(i = 0; i < s1->nb_priv_sections; i++)
1873         free_section(s1->priv_sections[i]);
1874     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1875
1876     /* free any loaded DLLs */
1877     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1878         DLLReference *ref = s1->loaded_dlls[i];
1879         if ( ref->handle )
1880             dlclose(ref->handle);
1881     }
1882
1883     /* free loaded dlls array */
1884     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1885
1886     /* free library paths */
1887     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1888
1889     /* free include paths */
1890     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1891     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1892     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1893
1894     tcc_free(s1);
1895 }
1896
1897 int tcc_add_include_path(TCCState *s1, const char *pathname)
1898 {
1899     char *pathname1;
1900
1901     pathname1 = tcc_strdup(pathname);
1902     dynarray_add((void ***)&s1->include_paths, &s1->nb_include_paths, pathname1);
1903     return 0;
1904 }
1905
1906 int tcc_add_sysinclude_path(TCCState *s1, const char *pathname)
1907 {
1908     char *pathname1;
1909
1910     pathname1 = tcc_strdup(pathname);
1911     dynarray_add((void ***)&s1->sysinclude_paths, &s1->nb_sysinclude_paths, pathname1);
1912     return 0;
1913 }
1914
1915 static int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1916 {
1917     const char *ext;
1918     ElfW(Ehdr) ehdr;
1919     int fd, ret;
1920     BufferedFile *saved_file;
1921
1922     /* find source file type with extension */
1923     ext = tcc_fileextension(filename);
1924     if (ext[0])
1925         ext++;
1926
1927     /* open the file */
1928     saved_file = file;
1929     file = tcc_open(s1, filename);
1930     if (!file) {
1931         if (flags & AFF_PRINT_ERROR) {
1932             error_noabort("file '%s' not found", filename);
1933         }
1934         ret = -1;
1935         goto fail1;
1936     }
1937
1938     if (flags & AFF_PREPROCESS) {
1939         ret = tcc_preprocess(s1);
1940     } else if (!ext[0] || !PATHCMP(ext, "c")) {
1941         /* C file assumed */
1942         ret = tcc_compile(s1);
1943     } else
1944 #ifdef CONFIG_TCC_ASM
1945     if (!strcmp(ext, "S")) {
1946         /* preprocessed assembler */
1947         ret = tcc_assemble(s1, 1);
1948     } else if (!strcmp(ext, "s")) {
1949         /* non preprocessed assembler */
1950         ret = tcc_assemble(s1, 0);
1951     } else
1952 #endif
1953 #ifdef TCC_TARGET_PE
1954     if (!PATHCMP(ext, "def")) {
1955         ret = pe_load_def_file(s1, file->fd);
1956     } else
1957 #endif
1958     {
1959         fd = file->fd;
1960         /* assume executable format: auto guess file type */
1961         ret = read(fd, &ehdr, sizeof(ehdr));
1962         lseek(fd, 0, SEEK_SET);
1963         if (ret <= 0) {
1964             error_noabort("could not read header");
1965             goto fail;
1966         } else if (ret != sizeof(ehdr)) {
1967             goto try_load_script;
1968         }
1969
1970         if (ehdr.e_ident[0] == ELFMAG0 &&
1971             ehdr.e_ident[1] == ELFMAG1 &&
1972             ehdr.e_ident[2] == ELFMAG2 &&
1973             ehdr.e_ident[3] == ELFMAG3) {
1974             file->line_num = 0; /* do not display line number if error */
1975             if (ehdr.e_type == ET_REL) {
1976                 ret = tcc_load_object_file(s1, fd, 0);
1977             } else if (ehdr.e_type == ET_DYN) {
1978                 if (s1->output_type == TCC_OUTPUT_MEMORY) {
1979 #ifdef TCC_TARGET_PE
1980                     ret = -1;
1981 #else
1982                     void *h;
1983                     h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1984                     if (h)
1985                         ret = 0;
1986                     else
1987                         ret = -1;
1988 #endif
1989                 } else {
1990                     ret = tcc_load_dll(s1, fd, filename,
1991                                        (flags & AFF_REFERENCED_DLL) != 0);
1992                 }
1993             } else {
1994                 error_noabort("unrecognized ELF file");
1995                 goto fail;
1996             }
1997         } else if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
1998             file->line_num = 0; /* do not display line number if error */
1999             ret = tcc_load_archive(s1, fd);
2000         } else
2001 #ifdef TCC_TARGET_COFF
2002         if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
2003             ret = tcc_load_coff(s1, fd);
2004         } else
2005 #endif
2006 #ifdef TCC_TARGET_PE
2007         if (pe_test_res_file(&ehdr, ret)) {
2008             ret = pe_load_res_file(s1, fd);
2009         } else
2010 #endif
2011         {
2012             /* as GNU ld, consider it is an ld script if not recognized */
2013         try_load_script:
2014             ret = tcc_load_ldscript(s1);
2015             if (ret < 0) {
2016                 error_noabort("unrecognized file type");
2017                 goto fail;
2018             }
2019         }
2020     }
2021  the_end:
2022     tcc_close(file);
2023  fail1:
2024     file = saved_file;
2025     return ret;
2026  fail:
2027     ret = -1;
2028     goto the_end;
2029 }
2030
2031 int tcc_add_file(TCCState *s, const char *filename)
2032 {
2033     if (s->output_type == TCC_OUTPUT_PREPROCESS)
2034         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS);
2035     else
2036         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR);
2037 }
2038
2039 int tcc_add_library_path(TCCState *s, const char *pathname)
2040 {
2041     char *pathname1;
2042
2043     pathname1 = tcc_strdup(pathname);
2044     dynarray_add((void ***)&s->library_paths, &s->nb_library_paths, pathname1);
2045     return 0;
2046 }
2047
2048 /* find and load a dll. Return non zero if not found */
2049 /* XXX: add '-rpath' option support ? */
2050 static int tcc_add_dll(TCCState *s, const char *filename, int flags)
2051 {
2052     char buf[1024];
2053     int i;
2054
2055     for(i = 0; i < s->nb_library_paths; i++) {
2056         snprintf(buf, sizeof(buf), "%s/%s",
2057                  s->library_paths[i], filename);
2058         if (tcc_add_file_internal(s, buf, flags) == 0)
2059             return 0;
2060     }
2061     return -1;
2062 }
2063
2064 /* the library name is the same as the argument of the '-l' option */
2065 int tcc_add_library(TCCState *s, const char *libraryname)
2066 {
2067     char buf[1024];
2068     int i;
2069
2070     /* first we look for the dynamic library if not static linking */
2071     if (!s->static_link) {
2072 #ifdef TCC_TARGET_PE
2073         snprintf(buf, sizeof(buf), "%s.def", libraryname);
2074 #else
2075         snprintf(buf, sizeof(buf), "lib%s.so", libraryname);
2076 #endif
2077         if (tcc_add_dll(s, buf, 0) == 0)
2078             return 0;
2079     }
2080
2081     /* then we look for the static library */
2082     for(i = 0; i < s->nb_library_paths; i++) {
2083         snprintf(buf, sizeof(buf), "%s/lib%s.a",
2084                  s->library_paths[i], libraryname);
2085         if (tcc_add_file_internal(s, buf, 0) == 0)
2086             return 0;
2087     }
2088     return -1;
2089 }
2090
2091 int tcc_add_symbol(TCCState *s, const char *name, void *val)
2092 {
2093     add_elf_sym(symtab_section, (unsigned long)val, 0,
2094                 ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
2095                 SHN_ABS, name);
2096     return 0;
2097 }
2098
2099 int tcc_set_output_type(TCCState *s, int output_type)
2100 {
2101     char buf[1024];
2102
2103     s->output_type = output_type;
2104
2105     if (!s->nostdinc) {
2106         /* default include paths */
2107         /* XXX: reverse order needed if -isystem support */
2108 #ifndef TCC_TARGET_PE
2109         tcc_add_sysinclude_path(s, CONFIG_SYSROOT "/usr/local/include");
2110         tcc_add_sysinclude_path(s, CONFIG_SYSROOT "/usr/include");
2111 #endif
2112         snprintf(buf, sizeof(buf), "%s/include", s->tcc_lib_path);
2113         tcc_add_sysinclude_path(s, buf);
2114 #ifdef TCC_TARGET_PE
2115         snprintf(buf, sizeof(buf), "%s/include/winapi", s->tcc_lib_path);
2116         tcc_add_sysinclude_path(s, buf);
2117 #endif
2118     }
2119
2120     /* if bound checking, then add corresponding sections */
2121 #ifdef CONFIG_TCC_BCHECK
2122     if (s->do_bounds_check) {
2123         /* define symbol */
2124         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
2125         /* create bounds sections */
2126         bounds_section = new_section(s, ".bounds",
2127                                      SHT_PROGBITS, SHF_ALLOC);
2128         lbounds_section = new_section(s, ".lbounds",
2129                                       SHT_PROGBITS, SHF_ALLOC);
2130     }
2131 #endif
2132
2133     if (s->char_is_unsigned) {
2134         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
2135     }
2136
2137     /* add debug sections */
2138     if (s->do_debug) {
2139         /* stab symbols */
2140         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
2141         stab_section->sh_entsize = sizeof(Stab_Sym);
2142         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
2143         put_elf_str(stabstr_section, "");
2144         stab_section->link = stabstr_section;
2145         /* put first entry */
2146         put_stabs("", 0, 0, 0, 0);
2147     }
2148
2149     /* add libc crt1/crti objects */
2150 #ifndef TCC_TARGET_PE
2151     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
2152         !s->nostdlib) {
2153         if (output_type != TCC_OUTPUT_DLL)
2154             tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crt1.o");
2155         tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crti.o");
2156     }
2157 #endif
2158
2159 #ifdef TCC_TARGET_PE
2160     snprintf(buf, sizeof(buf), "%s/lib", s->tcc_lib_path);
2161     tcc_add_library_path(s, buf);
2162 #endif
2163
2164     return 0;
2165 }
2166
2167 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
2168 #define FD_INVERT 0x0002 /* invert value before storing */
2169
2170 typedef struct FlagDef {
2171     uint16_t offset;
2172     uint16_t flags;
2173     const char *name;
2174 } FlagDef;
2175
2176 static const FlagDef warning_defs[] = {
2177     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
2178     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
2179     { offsetof(TCCState, warn_error), 0, "error" },
2180     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
2181       "implicit-function-declaration" },
2182 };
2183
2184 static int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
2185                     const char *name, int value)
2186 {
2187     int i;
2188     const FlagDef *p;
2189     const char *r;
2190
2191     r = name;
2192     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
2193         r += 3;
2194         value = !value;
2195     }
2196     for(i = 0, p = flags; i < nb_flags; i++, p++) {
2197         if (!strcmp(r, p->name))
2198             goto found;
2199     }
2200     return -1;
2201  found:
2202     if (p->flags & FD_INVERT)
2203         value = !value;
2204     *(int *)((uint8_t *)s + p->offset) = value;
2205     return 0;
2206 }
2207
2208
2209 /* set/reset a warning */
2210 int tcc_set_warning(TCCState *s, const char *warning_name, int value)
2211 {
2212     int i;
2213     const FlagDef *p;
2214
2215     if (!strcmp(warning_name, "all")) {
2216         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
2217             if (p->flags & WD_ALL)
2218                 *(int *)((uint8_t *)s + p->offset) = 1;
2219         }
2220         return 0;
2221     } else {
2222         return set_flag(s, warning_defs, countof(warning_defs),
2223                         warning_name, value);
2224     }
2225 }
2226
2227 static const FlagDef flag_defs[] = {
2228     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
2229     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
2230     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
2231     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
2232 };
2233
2234 /* set/reset a flag */
2235 int tcc_set_flag(TCCState *s, const char *flag_name, int value)
2236 {
2237     return set_flag(s, flag_defs, countof(flag_defs),
2238                     flag_name, value);
2239 }
2240
2241 /* set CONFIG_TCCDIR at runtime */
2242 void tcc_set_lib_path(TCCState *s, const char *path)
2243 {
2244     s->tcc_lib_path = tcc_strdup(path);
2245 }
2246
2247 void tcc_print_stats(TCCState *s, int64_t total_time)
2248 {
2249     double tt;
2250     tt = (double)total_time / 1000000.0;
2251     if (tt < 0.001)
2252         tt = 0.001;
2253     if (total_bytes < 1)
2254         total_bytes = 1;
2255     printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
2256            tok_ident - TOK_IDENT, total_lines, total_bytes,
2257            tt, (int)(total_lines / tt),
2258            total_bytes / tt / 1000000.0);
2259 }