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 /* global variables */
 238
 239 #ifdef TCC_TARGET_I386
 240 #include "i386-gen.c"
 241 #endif
 242
 243 #ifdef TCC_TARGET_ARM
 244 #include "arm-gen.c"
 245 #endif
 246
 247 #ifdef TCC_TARGET_C67
 248 #include "c67-gen.c"
 249 #endif
 250
 251 #ifdef TCC_TARGET_X86_64
 252 #include "x86_64-gen.c"
 253 #endif
 254
 255 #ifdef CONFIG_TCC_STATIC
 256
 257 #define RTLD_LAZY       0x001
 258 #define RTLD_NOW        0x002
 259 #define RTLD_GLOBAL     0x100
 260 #define RTLD_DEFAULT    NULL
 261
 262 /* dummy function for profiling */
 263 void *dlopen(const char *filename, int flag)
 264 {
 265     return NULL;
 266 }
 267
 268 void dlclose(void *p)
 269 {
 270 }
 271
 272 const char *dlerror(void)
 273 {
 274     return "error";
 275 }
 276
 277 typedef struct TCCSyms {
 278     char *str;
 279     void *ptr;
 280 } TCCSyms;
 281
 282 #define TCCSYM(a) { #a, &a, },
 283
 284 /* add the symbol you want here if no dynamic linking is done */
 285 static TCCSyms tcc_syms[] = {
 286 #if !defined(CONFIG_TCCBOOT)
 287     TCCSYM(printf)
 288     TCCSYM(fprintf)
 289     TCCSYM(fopen)
 290     TCCSYM(fclose)
 291 #endif
 292     { NULL, NULL },
 293 };
 294
 295 void *resolve_sym(TCCState *s1, const char *symbol, int type)
 296 {
 297     TCCSyms *p;
 298     p = tcc_syms;
 299     while (p->str != NULL) {
 300         if (!strcmp(p->str, symbol))
 301             return p->ptr;
 302         p++;
 303     }
 304     return NULL;
 305 }
 306
 307 #elif !defined(_WIN32)
 308
 309 #include <dlfcn.h>
 310
 311 void *resolve_sym(TCCState *s1, const char *sym, int type)
 312 {
 313     return dlsym(RTLD_DEFAULT, sym);
 314 }
 315
 316 #endif
 317
 318 /********************************************************/
 319
 320 /* we use our own 'finite' function to avoid potential problems with
 321    non standard math libs */
 322 /* XXX: endianness dependent */
 323 int ieee_finite(double d)
 324 {
 325     int *p = (int *)&d;
 326     return ((unsigned)((p[1] | 0x800fffff) + 1)) >> 31;
 327 }
 328
 329 /* copy a string and truncate it. */
 330 char *pstrcpy(char *buf, int buf_size, const char *s)
 331 {
 332     char *q, *q_end;
 333     int c;
 334
 335     if (buf_size > 0) {
 336         q = buf;
 337         q_end = buf + buf_size - 1;
 338         while (q < q_end) {
 339             c = *s++;
 340             if (c == '\0')
 341                 break;
 342             *q++ = c;
 343         }
 344         *q = '\0';
 345     }
 346     return buf;
 347 }
 348
 349 /* strcat and truncate. */
 350 char *pstrcat(char *buf, int buf_size, const char *s)
 351 {
 352     int len;
 353     len = strlen(buf);
 354     if (len < buf_size)
 355         pstrcpy(buf + len, buf_size - len, s);
 356     return buf;
 357 }
 358
 359 /* extract the basename of a file */
 360 char *tcc_basename(const char *name)
 361 {
 362     char *p = strchr(name, 0);
 363     while (p > name && !IS_PATHSEP(p[-1]))
 364         --p;
 365     return p;
 366 }
 367
 368 char *tcc_fileextension (const char *name)
 369 {
 370     char *b = tcc_basename(name);
 371     char *e = strrchr(b, '.');
 372     return e ? e : strchr(b, 0);
 373 }
 374
 375 #ifdef _WIN32
 376 char *normalize_slashes(char *path)
 377 {
 378     char *p;
 379     for (p = path; *p; ++p)
 380         if (*p == '\\')
 381             *p = '/';
 382     return path;
 383 }
 384
 385 void tcc_set_lib_path_w32(TCCState *s)
 386 {
 387     /* on win32, we suppose the lib and includes are at the location
 388        of 'tcc.exe' */
 389     char path[1024], *p;
 390     GetModuleFileNameA(NULL, path, sizeof path);
 391     p = tcc_basename(normalize_slashes(strlwr(path)));
 392     if (p - 5 > path && 0 == strncmp(p - 5, "/bin/", 5))
 393         p -= 5;
 394     else if (p > path)
 395         p--;
 396     *p = 0;
 397     tcc_set_lib_path(s, path);
 398 }
 399 #endif
 400
 401 void set_pages_executable(void *ptr, unsigned long length)
 402 {
 403 #ifdef _WIN32
 404     unsigned long old_protect;
 405     VirtualProtect(ptr, length, PAGE_EXECUTE_READWRITE, &old_protect);
 406 #else
 407     unsigned long start, end;
 408     start = (unsigned long)ptr & ~(PAGESIZE - 1);
 409     end = (unsigned long)ptr + length;
 410     end = (end + PAGESIZE - 1) & ~(PAGESIZE - 1);
 411     mprotect((void *)start, end - start, PROT_READ | PROT_WRITE | PROT_EXEC);
 412 #endif
 413 }
 414
 415 /* memory management */
 416 #ifdef MEM_DEBUG
 417 int mem_cur_size;
 418 int mem_max_size;
 419 unsigned malloc_usable_size(void*);
 420 #endif
 421
 422 void tcc_free(void *ptr)
 423 {
 424 #ifdef MEM_DEBUG
 425     mem_cur_size -= malloc_usable_size(ptr);
 426 #endif
 427     free(ptr);
 428 }
 429
 430 void *tcc_malloc(unsigned long size)
 431 {
 432     void *ptr;
 433     ptr = malloc(size);
 434     if (!ptr && size)
 435         error("memory full");
 436 #ifdef MEM_DEBUG
 437     mem_cur_size += malloc_usable_size(ptr);
 438     if (mem_cur_size > mem_max_size)
 439         mem_max_size = mem_cur_size;
 440 #endif
 441     return ptr;
 442 }
 443
 444 void *tcc_mallocz(unsigned long size)
 445 {
 446     void *ptr;
 447     ptr = tcc_malloc(size);
 448     memset(ptr, 0, size);
 449     return ptr;
 450 }
 451
 452 void *tcc_realloc(void *ptr, unsigned long size)
 453 {
 454     void *ptr1;
 455 #ifdef MEM_DEBUG
 456     mem_cur_size -= malloc_usable_size(ptr);
 457 #endif
 458     ptr1 = realloc(ptr, size);
 459 #ifdef MEM_DEBUG
 460     /* NOTE: count not correct if alloc error, but not critical */
 461     mem_cur_size += malloc_usable_size(ptr1);
 462     if (mem_cur_size > mem_max_size)
 463         mem_max_size = mem_cur_size;
 464 #endif
 465     return ptr1;
 466 }
 467
 468 char *tcc_strdup(const char *str)
 469 {
 470     char *ptr;
 471     ptr = tcc_malloc(strlen(str) + 1);
 472     strcpy(ptr, str);
 473     return ptr;
 474 }
 475
 476 #define free(p) use_tcc_free(p)
 477 #define malloc(s) use_tcc_malloc(s)
 478 #define realloc(p, s) use_tcc_realloc(p, s)
 479
 480 void dynarray_add(void ***ptab, int *nb_ptr, void *data)
 481 {
 482     int nb, nb_alloc;
 483     void **pp;
 484
 485     nb = *nb_ptr;
 486     pp = *ptab;
 487     /* every power of two we double array size */
 488     if ((nb & (nb - 1)) == 0) {
 489         if (!nb)
 490             nb_alloc = 1;
 491         else
 492             nb_alloc = nb * 2;
 493         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 494         if (!pp)
 495             error("memory full");
 496         *ptab = pp;
 497     }
 498     pp[nb++] = data;
 499     *nb_ptr = nb;
 500 }
 501
 502 void dynarray_reset(void *pp, int *n)
 503 {
 504     void **p;
 505     for (p = *(void***)pp; *n; ++p, --*n)
 506         if (*p)
 507             tcc_free(*p);
 508     tcc_free(*(void**)pp);
 509     *(void**)pp = NULL;
 510 }
 511
 512 /* symbol allocator */
 513 static Sym *__sym_malloc(void)
 514 {
 515     Sym *sym_pool, *sym, *last_sym;
 516     int i;
 517
 518     sym_pool = tcc_malloc(SYM_POOL_NB * sizeof(Sym));
 519     dynarray_add(&sym_pools, &nb_sym_pools, sym_pool);
 520
 521     last_sym = sym_free_first;
 522     sym = sym_pool;
 523     for(i = 0; i < SYM_POOL_NB; i++) {
 524         sym->next = last_sym;
 525         last_sym = sym;
 526         sym++;
 527     }
 528     sym_free_first = last_sym;
 529     return last_sym;
 530 }
 531
 532 static inline Sym *sym_malloc(void)
 533 {
 534     Sym *sym;
 535     sym = sym_free_first;
 536     if (!sym)
 537         sym = __sym_malloc();
 538     sym_free_first = sym->next;
 539     return sym;
 540 }
 541
 542 static inline void sym_free(Sym *sym)
 543 {
 544     sym->next = sym_free_first;
 545     sym_free_first = sym;
 546 }
 547
 548 Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags)
 549 {
 550     Section *sec;
 551
 552     sec = tcc_mallocz(sizeof(Section) + strlen(name));
 553     strcpy(sec->name, name);
 554     sec->sh_type = sh_type;
 555     sec->sh_flags = sh_flags;
 556     switch(sh_type) {
 557     case SHT_HASH:
 558     case SHT_REL:
 559     case SHT_RELA:
 560     case SHT_DYNSYM:
 561     case SHT_SYMTAB:
 562     case SHT_DYNAMIC:
 563         sec->sh_addralign = 4;
 564         break;
 565     case SHT_STRTAB:
 566         sec->sh_addralign = 1;
 567         break;
 568     default:
 569         sec->sh_addralign = 32; /* default conservative alignment */
 570         break;
 571     }
 572
 573     if (sh_flags & SHF_PRIVATE) {
 574         dynarray_add((void ***)&s1->priv_sections, &s1->nb_priv_sections, sec);
 575     } else {
 576         sec->sh_num = s1->nb_sections;
 577         dynarray_add((void ***)&s1->sections, &s1->nb_sections, sec);
 578     }
 579
 580     return sec;
 581 }
 582
 583 static void free_section(Section *s)
 584 {
 585     tcc_free(s->data);
 586 }
 587
 588 /* realloc section and set its content to zero */
 589 static void section_realloc(Section *sec, unsigned long new_size)
 590 {
 591     unsigned long size;
 592     unsigned char *data;
 593
 594     size = sec->data_allocated;
 595     if (size == 0)
 596         size = 1;
 597     while (size < new_size)
 598         size = size * 2;
 599     data = tcc_realloc(sec->data, size);
 600     if (!data)
 601         error("memory full");
 602     memset(data + sec->data_allocated, 0, size - sec->data_allocated);
 603     sec->data = data;
 604     sec->data_allocated = size;
 605 }
 606
 607 /* reserve at least 'size' bytes in section 'sec' from
 608    sec->data_offset. */
 609 static void *section_ptr_add(Section *sec, unsigned long size)
 610 {
 611     unsigned long offset, offset1;
 612
 613     offset = sec->data_offset;
 614     offset1 = offset + size;
 615     if (offset1 > sec->data_allocated)
 616         section_realloc(sec, offset1);
 617     sec->data_offset = offset1;
 618     return sec->data + offset;
 619 }
 620
 621 /* return a reference to a section, and create it if it does not
 622    exists */
 623 Section *find_section(TCCState *s1, const char *name)
 624 {
 625     Section *sec;
 626     int i;
 627     for(i = 1; i < s1->nb_sections; i++) {
 628         sec = s1->sections[i];
 629         if (!strcmp(name, sec->name))
 630             return sec;
 631     }
 632     /* sections are created as PROGBITS */
 633     return new_section(s1, name, SHT_PROGBITS, SHF_ALLOC);
 634 }
 635
 636 /* update sym->c so that it points to an external symbol in section
 637    'section' with value 'value' */
 638 static void put_extern_sym2(Sym *sym, Section *section,
 639                             unsigned long value, unsigned long size,
 640                             int can_add_underscore)
 641 {
 642     int sym_type, sym_bind, sh_num, info, other, attr;
 643     ElfW(Sym) *esym;
 644     const char *name;
 645     char buf1[256];
 646
 647     if (section == NULL)
 648         sh_num = SHN_UNDEF;
 649     else if (section == SECTION_ABS)
 650         sh_num = SHN_ABS;
 651     else
 652         sh_num = section->sh_num;
 653
 654     other = attr = 0;
 655
 656     if ((sym->type.t & VT_BTYPE) == VT_FUNC) {
 657         sym_type = STT_FUNC;
 658 #ifdef TCC_TARGET_PE
 659         if (sym->type.ref)
 660             attr = sym->type.ref->r;
 661         if (FUNC_EXPORT(attr))
 662             other |= 1;
 663         if (FUNC_CALL(attr) == FUNC_STDCALL)
 664             other |= 2;
 665 #endif
 666     } else {
 667         sym_type = STT_OBJECT;
 668     }
 669
 670     if (sym->type.t & VT_STATIC)
 671         sym_bind = STB_LOCAL;
 672     else
 673         sym_bind = STB_GLOBAL;
 674
 675     if (!sym->c) {
 676         name = get_tok_str(sym->v, NULL);
 677 #ifdef CONFIG_TCC_BCHECK
 678         if (tcc_state->do_bounds_check) {
 679             char buf[32];
 680
 681             /* XXX: avoid doing that for statics ? */
 682             /* if bound checking is activated, we change some function
 683                names by adding the "__bound" prefix */
 684             switch(sym->v) {
 685 #if 0
 686             /* XXX: we rely only on malloc hooks */
 687             case TOK_malloc:
 688             case TOK_free:
 689             case TOK_realloc:
 690             case TOK_memalign:
 691             case TOK_calloc:
 692 #endif
 693             case TOK_memcpy:
 694             case TOK_memmove:
 695             case TOK_memset:
 696             case TOK_strlen:
 697             case TOK_strcpy:
 698             case TOK_alloca:
 699                 strcpy(buf, "__bound_");
 700                 strcat(buf, name);
 701                 name = buf;
 702                 break;
 703             }
 704         }
 705 #endif
 706
 707 #ifdef TCC_TARGET_PE
 708         if ((other & 2) && can_add_underscore) {
 709             sprintf(buf1, "_%s@%d", name, FUNC_ARGS(attr));
 710             name = buf1;
 711         } else
 712 #endif
 713         if (tcc_state->leading_underscore && can_add_underscore) {
 714             buf1[0] = '_';
 715             pstrcpy(buf1 + 1, sizeof(buf1) - 1, name);
 716             name = buf1;
 717         }
 718         info = ELFW(ST_INFO)(sym_bind, sym_type);
 719         sym->c = add_elf_sym(symtab_section, value, size, info, other, sh_num, name);
 720     } else {
 721         esym = &((ElfW(Sym) *)symtab_section->data)[sym->c];
 722         esym->st_value = value;
 723         esym->st_size = size;
 724         esym->st_shndx = sh_num;
 725         esym->st_other |= other;
 726     }
 727 }
 728
 729 static void put_extern_sym(Sym *sym, Section *section,
 730                            unsigned long value, unsigned long size)
 731 {
 732     put_extern_sym2(sym, section, value, size, 1);
 733 }
 734
 735 /* add a new relocation entry to symbol 'sym' in section 's' */
 736 static void greloc(Section *s, Sym *sym, unsigned long offset, int type)
 737 {
 738     if (!sym->c)
 739         put_extern_sym(sym, NULL, 0, 0);
 740     /* now we can add ELF relocation info */
 741     put_elf_reloc(symtab_section, s, offset, type, sym->c);
 742 }
 743
 744 static inline int isid(int c)
 745 {
 746     return (c >= 'a' && c <= 'z') ||
 747         (c >= 'A' && c <= 'Z') ||
 748         c == '_';
 749 }
 750
 751 static inline int isnum(int c)
 752 {
 753     return c >= '0' && c <= '9';
 754 }
 755
 756 static inline int isoct(int c)
 757 {
 758     return c >= '0' && c <= '7';
 759 }
 760
 761 static inline int toup(int c)
 762 {
 763     if (c >= 'a' && c <= 'z')
 764         return c - 'a' + 'A';
 765     else
 766         return c;
 767 }
 768
 769 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 770 {
 771     int len;
 772     len = strlen(buf);
 773     vsnprintf(buf + len, buf_size - len, fmt, ap);
 774 }
 775
 776 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 777 {
 778     va_list ap;
 779     va_start(ap, fmt);
 780     strcat_vprintf(buf, buf_size, fmt, ap);
 781     va_end(ap);
 782 }
 783
 784 void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 785 {
 786     char buf[2048];
 787     BufferedFile **f;
 788
 789     buf[0] = '\0';
 790     if (file) {
 791         for(f = s1->include_stack; f < s1->include_stack_ptr; f++)
 792             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 793                           (*f)->filename, (*f)->line_num);
 794         if (file->line_num > 0) {
 795             strcat_printf(buf, sizeof(buf),
 796                           "%s:%d: ", file->filename, file->line_num);
 797         } else {
 798             strcat_printf(buf, sizeof(buf),
 799                           "%s: ", file->filename);
 800         }
 801     } else {
 802         strcat_printf(buf, sizeof(buf),
 803                       "tcc: ");
 804     }
 805     if (is_warning)
 806         strcat_printf(buf, sizeof(buf), "warning: ");
 807     else
 808         strcat_printf(buf, sizeof(buf), "error: ");
 809     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 810
 811     if (!s1->error_func) {
 812         /* default case: stderr */
 813         fprintf(stderr, "%s\n", buf);
 814     } else {
 815         s1->error_func(s1->error_opaque, buf);
 816     }
 817     if (!is_warning || s1->warn_error)
 818         s1->nb_errors++;
 819 }
 820
 821 void tcc_set_error_func(TCCState *s, void *error_opaque,
 822                         void (*error_func)(void *opaque, const char *msg))
 823 {
 824     s->error_opaque = error_opaque;
 825     s->error_func = error_func;
 826 }
 827
 828 /* error without aborting current compilation */
 829 void error_noabort(const char *fmt, ...)
 830 {
 831     TCCState *s1 = tcc_state;
 832     va_list ap;
 833
 834     va_start(ap, fmt);
 835     error1(s1, 0, fmt, ap);
 836     va_end(ap);
 837 }
 838
 839 void error(const char *fmt, ...)
 840 {
 841     TCCState *s1 = tcc_state;
 842     va_list ap;
 843
 844     va_start(ap, fmt);
 845     error1(s1, 0, fmt, ap);
 846     va_end(ap);
 847     /* better than nothing: in some cases, we accept to handle errors */
 848     if (s1->error_set_jmp_enabled) {
 849         longjmp(s1->error_jmp_buf, 1);
 850     } else {
 851         /* XXX: eliminate this someday */
 852         exit(1);
 853     }
 854 }
 855
 856 void expect(const char *msg)
 857 {
 858     error("%s expected", msg);
 859 }
 860
 861 void warning(const char *fmt, ...)
 862 {
 863     TCCState *s1 = tcc_state;
 864     va_list ap;
 865
 866     if (s1->warn_none)
 867         return;
 868
 869     va_start(ap, fmt);
 870     error1(s1, 1, fmt, ap);
 871     va_end(ap);
 872 }
 873
 874 void skip(int c)
 875 {
 876     if (tok != c)
 877         error("'%c' expected", c);
 878     next();
 879 }
 880
 881 static void test_lvalue(void)
 882 {
 883     if (!(vtop->r & VT_LVAL))
 884         expect("lvalue");
 885 }
 886
 887 /* CString handling */
 888
 889 static void cstr_realloc(CString *cstr, int new_size)
 890 {
 891     int size;
 892     void *data;
 893
 894     size = cstr->size_allocated;
 895     if (size == 0)
 896         size = 8; /* no need to allocate a too small first string */
 897     while (size < new_size)
 898         size = size * 2;
 899     data = tcc_realloc(cstr->data_allocated, size);
 900     if (!data)
 901         error("memory full");
 902     cstr->data_allocated = data;
 903     cstr->size_allocated = size;
 904     cstr->data = data;
 905 }
 906
 907 /* add a byte */
 908 static inline void cstr_ccat(CString *cstr, int ch)
 909 {
 910     int size;
 911     size = cstr->size + 1;
 912     if (size > cstr->size_allocated)
 913         cstr_realloc(cstr, size);
 914     ((unsigned char *)cstr->data)[size - 1] = ch;
 915     cstr->size = size;
 916 }
 917
 918 static void cstr_cat(CString *cstr, const char *str)
 919 {
 920     int c;
 921     for(;;) {
 922         c = *str;
 923         if (c == '\0')
 924             break;
 925         cstr_ccat(cstr, c);
 926         str++;
 927     }
 928 }
 929
 930 /* add a wide char */
 931 static void cstr_wccat(CString *cstr, int ch)
 932 {
 933     int size;
 934     size = cstr->size + sizeof(nwchar_t);
 935     if (size > cstr->size_allocated)
 936         cstr_realloc(cstr, size);
 937     *(nwchar_t *)(((unsigned char *)cstr->data) + size - sizeof(nwchar_t)) = ch;
 938     cstr->size = size;
 939 }
 940
 941 static void cstr_new(CString *cstr)
 942 {
 943     memset(cstr, 0, sizeof(CString));
 944 }
 945
 946 /* free string and reset it to NULL */
 947 static void cstr_free(CString *cstr)
 948 {
 949     tcc_free(cstr->data_allocated);
 950     cstr_new(cstr);
 951 }
 952
 953 #define cstr_reset(cstr) cstr_free(cstr)
 954
 955 /* XXX: unicode ? */
 956 static void add_char(CString *cstr, int c)
 957 {
 958     if (c == '\'' || c == '\"' || c == '\\') {
 959         /* XXX: could be more precise if char or string */
 960         cstr_ccat(cstr, '\\');
 961     }
 962     if (c >= 32 && c <= 126) {
 963         cstr_ccat(cstr, c);
 964     } else {
 965         cstr_ccat(cstr, '\\');
 966         if (c == '\n') {
 967             cstr_ccat(cstr, 'n');
 968         } else {
 969             cstr_ccat(cstr, '0' + ((c >> 6) & 7));
 970             cstr_ccat(cstr, '0' + ((c >> 3) & 7));
 971             cstr_ccat(cstr, '0' + (c & 7));
 972         }
 973     }
 974 }
 975
 976 /* push, without hashing */
 977 static Sym *sym_push2(Sym **ps, int v, int t, long c)
 978 {
 979     Sym *s;
 980     s = sym_malloc();
 981     s->v = v;
 982     s->type.t = t;
 983     s->c = c;
 984     s->next = NULL;
 985     /* add in stack */
 986     s->prev = *ps;
 987     *ps = s;
 988     return s;
 989 }
 990
 991 /* find a symbol and return its associated structure. 's' is the top
 992    of the symbol stack */
 993 static Sym *sym_find2(Sym *s, int v)
 994 {
 995     while (s) {
 996         if (s->v == v)
 997             return s;
 998         s = s->prev;
 999     }
1000     return NULL;
1001 }
1002
1003 /* structure lookup */
1004 static inline Sym *struct_find(int v)
1005 {
1006     v -= TOK_IDENT;
1007     if ((unsigned)v >= (unsigned)(tok_ident - TOK_IDENT))
1008         return NULL;
1009     return table_ident[v]->sym_struct;
1010 }
1011
1012 /* find an identifier */
1013 static inline Sym *sym_find(int v)
1014 {
1015     v -= TOK_IDENT;
1016     if ((unsigned)v >= (unsigned)(tok_ident - TOK_IDENT))
1017         return NULL;
1018     return table_ident[v]->sym_identifier;
1019 }
1020
1021 /* push a given symbol on the symbol stack */
1022 static Sym *sym_push(int v, CType *type, int r, int c)
1023 {
1024     Sym *s, **ps;
1025     TokenSym *ts;
1026
1027     if (local_stack)
1028         ps = &local_stack;
1029     else
1030         ps = &global_stack;
1031     s = sym_push2(ps, v, type->t, c);
1032     s->type.ref = type->ref;
1033     s->r = r;
1034     /* don't record fields or anonymous symbols */
1035     /* XXX: simplify */
1036     if (!(v & SYM_FIELD) && (v & ~SYM_STRUCT) < SYM_FIRST_ANOM) {
1037         /* record symbol in token array */
1038         ts = table_ident[(v & ~SYM_STRUCT) - TOK_IDENT];
1039         if (v & SYM_STRUCT)
1040             ps = &ts->sym_struct;
1041         else
1042             ps = &ts->sym_identifier;
1043         s->prev_tok = *ps;
1044         *ps = s;
1045     }
1046     return s;
1047 }
1048
1049 /* push a global identifier */
1050 static Sym *global_identifier_push(int v, int t, int c)
1051 {
1052     Sym *s, **ps;
1053     s = sym_push2(&global_stack, v, t, c);
1054     /* don't record anonymous symbol */
1055     if (v < SYM_FIRST_ANOM) {
1056         ps = &table_ident[v - TOK_IDENT]->sym_identifier;
1057         /* modify the top most local identifier, so that
1058            sym_identifier will point to 's' when popped */
1059         while (*ps != NULL)
1060             ps = &(*ps)->prev_tok;
1061         s->prev_tok = NULL;
1062         *ps = s;
1063     }
1064     return s;
1065 }
1066
1067 /* pop symbols until top reaches 'b' */
1068 static void sym_pop(Sym **ptop, Sym *b)
1069 {
1070     Sym *s, *ss, **ps;
1071     TokenSym *ts;
1072     int v;
1073
1074     s = *ptop;
1075     while(s != b) {
1076         ss = s->prev;
1077         v = s->v;
1078         /* remove symbol in token array */
1079         /* XXX: simplify */
1080         if (!(v & SYM_FIELD) && (v & ~SYM_STRUCT) < SYM_FIRST_ANOM) {
1081             ts = table_ident[(v & ~SYM_STRUCT) - TOK_IDENT];
1082             if (v & SYM_STRUCT)
1083                 ps = &ts->sym_struct;
1084             else
1085                 ps = &ts->sym_identifier;
1086             *ps = s->prev_tok;
1087         }
1088         sym_free(s);
1089         s = ss;
1090     }
1091     *ptop = b;
1092 }
1093
1094 /* I/O layer */
1095
1096 BufferedFile *tcc_open(TCCState *s1, const char *filename)
1097 {
1098     int fd;
1099     BufferedFile *bf;
1100
1101     if (strcmp(filename, "-") == 0)
1102         fd = 0, filename = "stdin";
1103     else
1104         fd = open(filename, O_RDONLY | O_BINARY);
1105     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
1106         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
1107                (s1->include_stack_ptr - s1->include_stack), "", filename);
1108     if (fd < 0)
1109         return NULL;
1110     bf = tcc_malloc(sizeof(BufferedFile));
1111     bf->fd = fd;
1112     bf->buf_ptr = bf->buffer;
1113     bf->buf_end = bf->buffer;
1114     bf->buffer[0] = CH_EOB; /* put eob symbol */
1115     pstrcpy(bf->filename, sizeof(bf->filename), filename);
1116 #ifdef _WIN32
1117     normalize_slashes(bf->filename);
1118 #endif
1119     bf->line_num = 1;
1120     bf->ifndef_macro = 0;
1121     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
1122     //    printf("opening '%s'\n", filename);
1123     return bf;
1124 }
1125
1126 void tcc_close(BufferedFile *bf)
1127 {
1128     total_lines += bf->line_num;
1129     close(bf->fd);
1130     tcc_free(bf);
1131 }
1132
1133 #include "tccpp.c"
1134 #include "tccgen.c"
1135
1136
1137 /* compile the C file opened in 'file'. Return non zero if errors. */
1138 static int tcc_compile(TCCState *s1)
1139 {
1140     Sym *define_start;
1141     char buf[512];
1142     volatile int section_sym;
1143
1144 #ifdef INC_DEBUG
1145     printf("%s: **** new file\n", file->filename);
1146 #endif
1147     preprocess_init(s1);
1148
1149     cur_text_section = NULL;
1150     funcname = "";
1151     anon_sym = SYM_FIRST_ANOM;
1152
1153     /* file info: full path + filename */
1154     section_sym = 0; /* avoid warning */
1155     if (s1->do_debug) {
1156         section_sym = put_elf_sym(symtab_section, 0, 0,
1157                                   ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
1158                                   text_section->sh_num, NULL);
1159         getcwd(buf, sizeof(buf));
1160 #ifdef _WIN32
1161         normalize_slashes(buf);
1162 #endif
1163         pstrcat(buf, sizeof(buf), "/");
1164         put_stabs_r(buf, N_SO, 0, 0,
1165                     text_section->data_offset, text_section, section_sym);
1166         put_stabs_r(file->filename, N_SO, 0, 0,
1167                     text_section->data_offset, text_section, section_sym);
1168     }
1169     /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
1170        symbols can be safely used */
1171     put_elf_sym(symtab_section, 0, 0,
1172                 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
1173                 SHN_ABS, file->filename);
1174
1175     /* define some often used types */
1176     int_type.t = VT_INT;
1177
1178     char_pointer_type.t = VT_BYTE;
1179     mk_pointer(&char_pointer_type);
1180
1181     func_old_type.t = VT_FUNC;
1182     func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
1183
1184 #if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP)
1185     float_type.t = VT_FLOAT;
1186     double_type.t = VT_DOUBLE;
1187
1188     func_float_type.t = VT_FUNC;
1189     func_float_type.ref = sym_push(SYM_FIELD, &float_type, FUNC_CDECL, FUNC_OLD);
1190     func_double_type.t = VT_FUNC;
1191     func_double_type.ref = sym_push(SYM_FIELD, &double_type, FUNC_CDECL, FUNC_OLD);
1192 #endif
1193
1194 #if 0
1195     /* define 'void *alloca(unsigned int)' builtin function */
1196     {
1197         Sym *s1;
1198
1199         p = anon_sym++;
1200         sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
1201         s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
1202         s1->next = NULL;
1203         sym->next = s1;
1204         sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
1205     }
1206 #endif
1207
1208     define_start = define_stack;
1209     nocode_wanted = 1;
1210
1211     if (setjmp(s1->error_jmp_buf) == 0) {
1212         s1->nb_errors = 0;
1213         s1->error_set_jmp_enabled = 1;
1214
1215         ch = file->buf_ptr[0];
1216         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
1217         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
1218         next();
1219         decl(VT_CONST);
1220         if (tok != TOK_EOF)
1221             expect("declaration");
1222
1223         /* end of translation unit info */
1224         if (s1->do_debug) {
1225             put_stabs_r(NULL, N_SO, 0, 0,
1226                         text_section->data_offset, text_section, section_sym);
1227         }
1228     }
1229     s1->error_set_jmp_enabled = 0;
1230
1231     /* reset define stack, but leave -Dsymbols (may be incorrect if
1232        they are undefined) */
1233     free_defines(define_start);
1234
1235     gen_inline_functions();
1236
1237     sym_pop(&global_stack, NULL);
1238     sym_pop(&local_stack, NULL);
1239
1240     return s1->nb_errors != 0 ? -1 : 0;
1241 }
1242
1243 int tcc_compile_string(TCCState *s, const char *str)
1244 {
1245     BufferedFile bf1, *bf = &bf1;
1246     int ret, len;
1247     char *buf;
1248
1249     /* init file structure */
1250     bf->fd = -1;
1251     /* XXX: avoid copying */
1252     len = strlen(str);
1253     buf = tcc_malloc(len + 1);
1254     if (!buf)
1255         return -1;
1256     memcpy(buf, str, len);
1257     buf[len] = CH_EOB;
1258     bf->buf_ptr = buf;
1259     bf->buf_end = buf + len;
1260     pstrcpy(bf->filename, sizeof(bf->filename), "<string>");
1261     bf->line_num = 1;
1262     file = bf;
1263     ret = tcc_compile(s);
1264     file = NULL;
1265     tcc_free(buf);
1266
1267     /* currently, no need to close */
1268     return ret;
1269 }
1270
1271 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
1272 void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
1273 {
1274     BufferedFile bf1, *bf = &bf1;
1275
1276     pstrcpy(bf->buffer, IO_BUF_SIZE, sym);
1277     pstrcat(bf->buffer, IO_BUF_SIZE, " ");
1278     /* default value */
1279     if (!value)
1280         value = "1";
1281     pstrcat(bf->buffer, IO_BUF_SIZE, value);
1282
1283     /* init file structure */
1284     bf->fd = -1;
1285     bf->buf_ptr = bf->buffer;
1286     bf->buf_end = bf->buffer + strlen(bf->buffer);
1287     *bf->buf_end = CH_EOB;
1288     bf->filename[0] = '\0';
1289     bf->line_num = 1;
1290     file = bf;
1291
1292     s1->include_stack_ptr = s1->include_stack;
1293
1294     /* parse with define parser */
1295     ch = file->buf_ptr[0];
1296     next_nomacro();
1297     parse_define();
1298     file = NULL;
1299 }
1300
1301 /* undefine a preprocessor symbol */
1302 void tcc_undefine_symbol(TCCState *s1, const char *sym)
1303 {
1304     TokenSym *ts;
1305     Sym *s;
1306     ts = tok_alloc(sym, strlen(sym));
1307     s = define_find(ts->tok);
1308     /* undefine symbol by putting an invalid name */
1309     if (s)
1310         define_undef(s);
1311 }
1312
1313 #ifdef CONFIG_TCC_ASM
1314
1315 #ifdef TCC_TARGET_I386
1316 #include "i386-asm.c"
1317 #endif
1318 #include "tccasm.c"
1319
1320 #else
1321 static void asm_instr(void)
1322 {
1323     error("inline asm() not supported");
1324 }
1325 static void asm_global_instr(void)
1326 {
1327     error("inline asm() not supported");
1328 }
1329 #endif
1330
1331 #include "tccelf.c"
1332
1333 #ifdef TCC_TARGET_COFF
1334 #include "tcccoff.c"
1335 #endif
1336
1337 #ifdef TCC_TARGET_PE
1338 #include "tccpe.c"
1339 #endif
1340
1341 #ifdef CONFIG_TCC_BACKTRACE
1342 /* print the position in the source file of PC value 'pc' by reading
1343    the stabs debug information */
1344 static unsigned long rt_printline(unsigned long wanted_pc)
1345 {
1346     Stab_Sym *sym, *sym_end;
1347     char func_name[128], last_func_name[128];
1348     unsigned long func_addr, last_pc, pc;
1349     const char *incl_files[INCLUDE_STACK_SIZE];
1350     int incl_index, len, last_line_num, i;
1351     const char *str, *p;
1352
1353     fprintf(stderr, "0x%08lx:", wanted_pc);
1354
1355     func_name[0] = '\0';
1356     func_addr = 0;
1357     incl_index = 0;
1358     last_func_name[0] = '\0';
1359     last_pc = 0xffffffff;
1360     last_line_num = 1;
1361     sym = (Stab_Sym *)stab_section->data + 1;
1362     sym_end = (Stab_Sym *)(stab_section->data + stab_section->data_offset);
1363     while (sym < sym_end) {
1364         switch(sym->n_type) {
1365             /* function start or end */
1366         case N_FUN:
1367             if (sym->n_strx == 0) {
1368                 /* we test if between last line and end of function */
1369                 pc = sym->n_value + func_addr;
1370                 if (wanted_pc >= last_pc && wanted_pc < pc)
1371                     goto found;
1372                 func_name[0] = '\0';
1373                 func_addr = 0;
1374             } else {
1375                 str = stabstr_section->data + sym->n_strx;
1376                 p = strchr(str, ':');
1377                 if (!p) {
1378                     pstrcpy(func_name, sizeof(func_name), str);
1379                 } else {
1380                     len = p - str;
1381                     if (len > sizeof(func_name) - 1)
1382                         len = sizeof(func_name) - 1;
1383                     memcpy(func_name, str, len);
1384                     func_name[len] = '\0';
1385                 }
1386                 func_addr = sym->n_value;
1387             }
1388             break;
1389             /* line number info */
1390         case N_SLINE:
1391             pc = sym->n_value + func_addr;
1392             if (wanted_pc >= last_pc && wanted_pc < pc)
1393                 goto found;
1394             last_pc = pc;
1395             last_line_num = sym->n_desc;
1396             /* XXX: slow! */
1397             strcpy(last_func_name, func_name);
1398             break;
1399             /* include files */
1400         case N_BINCL:
1401             str = stabstr_section->data + sym->n_strx;
1402         add_incl:
1403             if (incl_index < INCLUDE_STACK_SIZE) {
1404                 incl_files[incl_index++] = str;
1405             }
1406             break;
1407         case N_EINCL:
1408             if (incl_index > 1)
1409                 incl_index--;
1410             break;
1411         case N_SO:
1412             if (sym->n_strx == 0) {
1413                 incl_index = 0; /* end of translation unit */
1414             } else {
1415                 str = stabstr_section->data + sym->n_strx;
1416                 /* do not add path */
1417                 len = strlen(str);
1418                 if (len > 0 && str[len - 1] != '/')
1419                     goto add_incl;
1420             }
1421             break;
1422         }
1423         sym++;
1424     }
1425
1426     /* second pass: we try symtab symbols (no line number info) */
1427     incl_index = 0;
1428     {
1429         ElfW(Sym) *sym, *sym_end;
1430         int type;
1431
1432         sym_end = (ElfW(Sym) *)(symtab_section->data + symtab_section->data_offset);
1433         for(sym = (ElfW(Sym) *)symtab_section->data + 1;
1434             sym < sym_end;
1435             sym++) {
1436             type = ELFW(ST_TYPE)(sym->st_info);
1437             if (type == STT_FUNC) {
1438                 if (wanted_pc >= sym->st_value &&
1439                     wanted_pc < sym->st_value + sym->st_size) {
1440                     pstrcpy(last_func_name, sizeof(last_func_name),
1441                             strtab_section->data + sym->st_name);
1442                     func_addr = sym->st_value;
1443                     goto found;
1444                 }
1445             }
1446         }
1447     }
1448     /* did not find any info: */
1449     fprintf(stderr, " ???\n");
1450     return 0;
1451  found:
1452     if (last_func_name[0] != '\0') {
1453         fprintf(stderr, " %s()", last_func_name);
1454     }
1455     if (incl_index > 0) {
1456         fprintf(stderr, " (%s:%d",
1457                 incl_files[incl_index - 1], last_line_num);
1458         for(i = incl_index - 2; i >= 0; i--)
1459             fprintf(stderr, ", included from %s", incl_files[i]);
1460         fprintf(stderr, ")");
1461     }
1462     fprintf(stderr, "\n");
1463     return func_addr;
1464 }
1465
1466 #ifdef __i386__
1467 /* fix for glibc 2.1 */
1468 #ifndef REG_EIP
1469 #define REG_EIP EIP
1470 #define REG_EBP EBP
1471 #endif
1472
1473 /* return the PC at frame level 'level'. Return non zero if not found */
1474 static int rt_get_caller_pc(unsigned long *paddr,
1475                             ucontext_t *uc, int level)
1476 {
1477     unsigned long fp;
1478     int i;
1479
1480     if (level == 0) {
1481 #if defined(__FreeBSD__)
1482         *paddr = uc->uc_mcontext.mc_eip;
1483 #elif defined(__dietlibc__)
1484         *paddr = uc->uc_mcontext.eip;
1485 #else
1486         *paddr = uc->uc_mcontext.gregs[REG_EIP];
1487 #endif
1488         return 0;
1489     } else {
1490 #if defined(__FreeBSD__)
1491         fp = uc->uc_mcontext.mc_ebp;
1492 #elif defined(__dietlibc__)
1493         fp = uc->uc_mcontext.ebp;
1494 #else
1495         fp = uc->uc_mcontext.gregs[REG_EBP];
1496 #endif
1497         for(i=1;i<level;i++) {
1498             /* XXX: check address validity with program info */
1499             if (fp <= 0x1000 || fp >= 0xc0000000)
1500                 return -1;
1501             fp = ((unsigned long *)fp)[0];
1502         }
1503         *paddr = ((unsigned long *)fp)[1];
1504         return 0;
1505     }
1506 }
1507 #elif defined(__x86_64__)
1508 /* return the PC at frame level 'level'. Return non zero if not found */
1509 static int rt_get_caller_pc(unsigned long *paddr,
1510                             ucontext_t *uc, int level)
1511 {
1512     unsigned long fp;
1513     int i;
1514
1515     if (level == 0) {
1516         /* XXX: only support linux */
1517         *paddr = uc->uc_mcontext.gregs[REG_RIP];
1518         return 0;
1519     } else {
1520         fp = uc->uc_mcontext.gregs[REG_RBP];
1521         for(i=1;i<level;i++) {
1522             /* XXX: check address validity with program info */
1523             if (fp <= 0x1000)
1524                 return -1;
1525             fp = ((unsigned long *)fp)[0];
1526         }
1527         *paddr = ((unsigned long *)fp)[1];
1528         return 0;
1529     }
1530 }
1531 #else
1532 #warning add arch specific rt_get_caller_pc()
1533 static int rt_get_caller_pc(unsigned long *paddr,
1534                             ucontext_t *uc, int level)
1535 {
1536     return -1;
1537 }
1538 #endif
1539
1540 /* emit a run time error at position 'pc' */
1541 void rt_error(ucontext_t *uc, const char *fmt, ...)
1542 {
1543     va_list ap;
1544     unsigned long pc;
1545     int i;
1546
1547     va_start(ap, fmt);
1548     fprintf(stderr, "Runtime error: ");
1549     vfprintf(stderr, fmt, ap);
1550     fprintf(stderr, "\n");
1551     for(i=0;i<num_callers;i++) {
1552         if (rt_get_caller_pc(&pc, uc, i) < 0)
1553             break;
1554         if (i == 0)
1555             fprintf(stderr, "at ");
1556         else
1557             fprintf(stderr, "by ");
1558         pc = rt_printline(pc);
1559         if (pc == rt_prog_main && pc)
1560             break;
1561     }
1562     exit(255);
1563     va_end(ap);
1564 }
1565
1566 /* signal handler for fatal errors */
1567 static void sig_error(int signum, siginfo_t *siginf, void *puc)
1568 {
1569     ucontext_t *uc = puc;
1570
1571     switch(signum) {
1572     case SIGFPE:
1573         switch(siginf->si_code) {
1574         case FPE_INTDIV:
1575         case FPE_FLTDIV:
1576             rt_error(uc, "division by zero");
1577             break;
1578         default:
1579             rt_error(uc, "floating point exception");
1580             break;
1581         }
1582         break;
1583     case SIGBUS:
1584     case SIGSEGV:
1585         if (rt_bound_error_msg && *rt_bound_error_msg)
1586             rt_error(uc, *rt_bound_error_msg);
1587         else
1588             rt_error(uc, "dereferencing invalid pointer");
1589         break;
1590     case SIGILL:
1591         rt_error(uc, "illegal instruction");
1592         break;
1593     case SIGABRT:
1594         rt_error(uc, "abort() called");
1595         break;
1596     default:
1597         rt_error(uc, "caught signal %d", signum);
1598         break;
1599     }
1600     exit(255);
1601 }
1602
1603 #endif
1604
1605 /* copy code into memory passed in by the caller and do all relocations
1606    (needed before using tcc_get_symbol()).
1607    returns -1 on error and required size if ptr is NULL */
1608 int tcc_relocate(TCCState *s1, void *ptr)
1609 {
1610     Section *s;
1611     unsigned long offset, length, mem;
1612     int i;
1613
1614     if (0 == s1->runtime_added) {
1615         s1->runtime_added = 1;
1616         s1->nb_errors = 0;
1617 #ifdef TCC_TARGET_PE
1618         pe_add_runtime(s1);
1619         relocate_common_syms();
1620         tcc_add_linker_symbols(s1);
1621 #else
1622         tcc_add_runtime(s1);
1623         relocate_common_syms();
1624         tcc_add_linker_symbols(s1);
1625         build_got_entries(s1);
1626 #endif
1627     }
1628
1629     offset = 0, mem = (unsigned long)ptr;
1630     for(i = 1; i < s1->nb_sections; i++) {
1631         s = s1->sections[i];
1632         if (0 == (s->sh_flags & SHF_ALLOC))
1633             continue;
1634         length = s->data_offset;
1635         s->sh_addr = mem ? (mem + offset + 15) & ~15 : 0;
1636         offset = (offset + length + 15) & ~15;
1637     }
1638
1639     /* relocate symbols */
1640     relocate_syms(s1, 1);
1641     if (s1->nb_errors)
1642         return -1;
1643
1644 #ifdef TCC_TARGET_X86_64
1645     s1->runtime_plt_and_got_offset = 0;
1646     s1->runtime_plt_and_got = (char *)(mem + offset);
1647     /* double the size of the buffer for got and plt entries
1648        XXX: calculate exact size for them? */
1649     offset *= 2;
1650 #endif
1651
1652     if (0 == mem)
1653         return offset + 15;
1654
1655     /* relocate each section */
1656     for(i = 1; i < s1->nb_sections; i++) {
1657         s = s1->sections[i];
1658         if (s->reloc)
1659             relocate_section(s1, s);
1660     }
1661
1662     for(i = 1; i < s1->nb_sections; i++) {
1663         s = s1->sections[i];
1664         if (0 == (s->sh_flags & SHF_ALLOC))
1665             continue;
1666         length = s->data_offset;
1667         // printf("%-12s %08x %04x\n", s->name, s->sh_addr, length);
1668         ptr = (void*)s->sh_addr;
1669         if (NULL == s->data || s->sh_type == SHT_NOBITS)
1670             memset(ptr, 0, length);
1671         else
1672             memcpy(ptr, s->data, length);
1673         /* mark executable sections as executable in memory */
1674         if (s->sh_flags & SHF_EXECINSTR)
1675             set_pages_executable(ptr, length);
1676     }
1677 #ifdef TCC_TARGET_X86_64
1678     set_pages_executable(s1->runtime_plt_and_got,
1679                          s1->runtime_plt_and_got_offset);
1680 #endif
1681     return 0;
1682 }
1683
1684 /* launch the compiled program with the given arguments */
1685 int tcc_run(TCCState *s1, int argc, char **argv)
1686 {
1687     int (*prog_main)(int, char **);
1688     void *ptr;
1689     int ret;
1690
1691     ret = tcc_relocate(s1, NULL);
1692     if (ret < 0)
1693         return -1;
1694     ptr = tcc_malloc(ret);
1695     tcc_relocate(s1, ptr);
1696
1697     prog_main = tcc_get_symbol_err(s1, "main");
1698
1699     if (s1->do_debug) {
1700 #ifdef CONFIG_TCC_BACKTRACE
1701         struct sigaction sigact;
1702         /* install TCC signal handlers to print debug info on fatal
1703            runtime errors */
1704         sigact.sa_flags = SA_SIGINFO | SA_RESETHAND;
1705         sigact.sa_sigaction = sig_error;
1706         sigemptyset(&sigact.sa_mask);
1707         sigaction(SIGFPE, &sigact, NULL);
1708         sigaction(SIGILL, &sigact, NULL);
1709         sigaction(SIGSEGV, &sigact, NULL);
1710         sigaction(SIGBUS, &sigact, NULL);
1711         sigaction(SIGABRT, &sigact, NULL);
1712 #else
1713         error("debug mode not available");
1714 #endif
1715     }
1716
1717 #ifdef CONFIG_TCC_BCHECK
1718     if (s1->do_bounds_check) {
1719         void (*bound_init)(void);
1720         void (*bound_exit)(void);
1721         /* set error function */
1722         rt_bound_error_msg = tcc_get_symbol_err(s1, "__bound_error_msg");
1723         rt_prog_main = (unsigned long)prog_main;
1724         /* XXX: use .init section so that it also work in binary ? */
1725         bound_init = tcc_get_symbol_err(s1, "__bound_init");
1726         bound_exit = tcc_get_symbol_err(s1, "__bound_exit");
1727         bound_init();
1728         ret = (*prog_main)(argc, argv);
1729         bound_exit();
1730     } else
1731 #endif
1732     ret = (*prog_main)(argc, argv);
1733     tcc_free(ptr);
1734     return ret;
1735 }
1736
1737 void tcc_memstats(void)
1738 {
1739 #ifdef MEM_DEBUG
1740     printf("memory in use: %d\n", mem_cur_size);
1741 #endif
1742 }
1743
1744 static void tcc_cleanup(void)
1745 {
1746     int i, n;
1747
1748     if (NULL == tcc_state)
1749         return;
1750     tcc_state = NULL;
1751
1752     /* free -D defines */
1753     free_defines(NULL);
1754
1755     /* free tokens */
1756     n = tok_ident - TOK_IDENT;
1757     for(i = 0; i < n; i++)
1758         tcc_free(table_ident[i]);
1759     tcc_free(table_ident);
1760
1761     /* free sym_pools */
1762     dynarray_reset(&sym_pools, &nb_sym_pools);
1763     /* string buffer */
1764     cstr_free(&tokcstr);
1765     /* reset symbol stack */
1766     sym_free_first = NULL;
1767     /* cleanup from error/setjmp */
1768     macro_ptr = NULL;
1769 }
1770
1771 TCCState *tcc_new(void)
1772 {
1773     TCCState *s;
1774
1775     tcc_cleanup();
1776
1777     s = tcc_mallocz(sizeof(TCCState));
1778     if (!s)
1779         return NULL;
1780     tcc_state = s;
1781     s->output_type = TCC_OUTPUT_MEMORY;
1782     s->tcc_lib_path = CONFIG_TCCDIR;
1783
1784     preprocess_new();
1785
1786     /* we add dummy defines for some special macros to speed up tests
1787        and to have working defined() */
1788     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
1789     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
1790     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
1791     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
1792
1793     /* standard defines */
1794     tcc_define_symbol(s, "__STDC__", NULL);
1795     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
1796 #if defined(TCC_TARGET_I386)
1797     tcc_define_symbol(s, "__i386__", NULL);
1798 #endif
1799 #if defined(TCC_TARGET_X86_64)
1800     tcc_define_symbol(s, "__x86_64__", NULL);
1801 #endif
1802 #if defined(TCC_TARGET_ARM)
1803     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
1804     tcc_define_symbol(s, "__arm_elf__", NULL);
1805     tcc_define_symbol(s, "__arm_elf", NULL);
1806     tcc_define_symbol(s, "arm_elf", NULL);
1807     tcc_define_symbol(s, "__arm__", NULL);
1808     tcc_define_symbol(s, "__arm", NULL);
1809     tcc_define_symbol(s, "arm", NULL);
1810     tcc_define_symbol(s, "__APCS_32__", NULL);
1811 #endif
1812 #ifdef TCC_TARGET_PE
1813     tcc_define_symbol(s, "_WIN32", NULL);
1814 #else
1815     tcc_define_symbol(s, "__unix__", NULL);
1816     tcc_define_symbol(s, "__unix", NULL);
1817 #if defined(__linux)
1818     tcc_define_symbol(s, "__linux__", NULL);
1819     tcc_define_symbol(s, "__linux", NULL);
1820 #endif
1821 #endif
1822     /* tiny C specific defines */
1823     tcc_define_symbol(s, "__TINYC__", NULL);
1824
1825     /* tiny C & gcc defines */
1826     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned int");
1827     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "int");
1828 #ifdef TCC_TARGET_PE
1829     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
1830 #else
1831     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
1832 #endif
1833
1834 #ifndef TCC_TARGET_PE
1835     /* default library paths */
1836     tcc_add_library_path(s, CONFIG_SYSROOT "/usr/local/lib");
1837     tcc_add_library_path(s, CONFIG_SYSROOT "/usr/lib");
1838     tcc_add_library_path(s, CONFIG_SYSROOT "/lib");
1839 #endif
1840
1841     /* no section zero */
1842     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
1843
1844     /* create standard sections */
1845     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
1846     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
1847     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
1848
1849     /* symbols are always generated for linking stage */
1850     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
1851                                 ".strtab",
1852                                 ".hashtab", SHF_PRIVATE);
1853     strtab_section = symtab_section->link;
1854
1855     /* private symbol table for dynamic symbols */
1856     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
1857                                       ".dynstrtab",
1858                                       ".dynhashtab", SHF_PRIVATE);
1859     s->alacarte_link = 1;
1860
1861 #ifdef CHAR_IS_UNSIGNED
1862     s->char_is_unsigned = 1;
1863 #endif
1864 #if defined(TCC_TARGET_PE) && 0
1865     /* XXX: currently the PE linker is not ready to support that */
1866     s->leading_underscore = 1;
1867 #endif
1868     return s;
1869 }
1870
1871 void tcc_delete(TCCState *s1)
1872 {
1873     int i;
1874
1875     tcc_cleanup();
1876
1877     /* free all sections */
1878     for(i = 1; i < s1->nb_sections; i++)
1879         free_section(s1->sections[i]);
1880     dynarray_reset(&s1->sections, &s1->nb_sections);
1881
1882     for(i = 0; i < s1->nb_priv_sections; i++)
1883         free_section(s1->priv_sections[i]);
1884     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1885
1886     /* free any loaded DLLs */
1887     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1888         DLLReference *ref = s1->loaded_dlls[i];
1889         if ( ref->handle )
1890             dlclose(ref->handle);
1891     }
1892
1893     /* free loaded dlls array */
1894     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1895
1896     /* free library paths */
1897     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1898
1899     /* free include paths */
1900     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1901     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1902     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1903
1904     tcc_free(s1);
1905 }
1906
1907 int tcc_add_include_path(TCCState *s1, const char *pathname)
1908 {
1909     char *pathname1;
1910
1911     pathname1 = tcc_strdup(pathname);
1912     dynarray_add((void ***)&s1->include_paths, &s1->nb_include_paths, pathname1);
1913     return 0;
1914 }
1915
1916 int tcc_add_sysinclude_path(TCCState *s1, const char *pathname)
1917 {
1918     char *pathname1;
1919
1920     pathname1 = tcc_strdup(pathname);
1921     dynarray_add((void ***)&s1->sysinclude_paths, &s1->nb_sysinclude_paths, pathname1);
1922     return 0;
1923 }
1924
1925 static int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1926 {
1927     const char *ext;
1928     ElfW(Ehdr) ehdr;
1929     int fd, ret;
1930     BufferedFile *saved_file;
1931
1932     /* find source file type with extension */
1933     ext = tcc_fileextension(filename);
1934     if (ext[0])
1935         ext++;
1936
1937     /* open the file */
1938     saved_file = file;
1939     file = tcc_open(s1, filename);
1940     if (!file) {
1941         if (flags & AFF_PRINT_ERROR) {
1942             error_noabort("file '%s' not found", filename);
1943         }
1944         ret = -1;
1945         goto fail1;
1946     }
1947
1948     if (flags & AFF_PREPROCESS) {
1949         ret = tcc_preprocess(s1);
1950     } else if (!ext[0] || !PATHCMP(ext, "c")) {
1951         /* C file assumed */
1952         ret = tcc_compile(s1);
1953     } else
1954 #ifdef CONFIG_TCC_ASM
1955     if (!strcmp(ext, "S")) {
1956         /* preprocessed assembler */
1957         ret = tcc_assemble(s1, 1);
1958     } else if (!strcmp(ext, "s")) {
1959         /* non preprocessed assembler */
1960         ret = tcc_assemble(s1, 0);
1961     } else
1962 #endif
1963 #ifdef TCC_TARGET_PE
1964     if (!PATHCMP(ext, "def")) {
1965         ret = pe_load_def_file(s1, file->fd);
1966     } else
1967 #endif
1968     {
1969         fd = file->fd;
1970         /* assume executable format: auto guess file type */
1971         ret = read(fd, &ehdr, sizeof(ehdr));
1972         lseek(fd, 0, SEEK_SET);
1973         if (ret <= 0) {
1974             error_noabort("could not read header");
1975             goto fail;
1976         } else if (ret != sizeof(ehdr)) {
1977             goto try_load_script;
1978         }
1979
1980         if (ehdr.e_ident[0] == ELFMAG0 &&
1981             ehdr.e_ident[1] == ELFMAG1 &&
1982             ehdr.e_ident[2] == ELFMAG2 &&
1983             ehdr.e_ident[3] == ELFMAG3) {
1984             file->line_num = 0; /* do not display line number if error */
1985             if (ehdr.e_type == ET_REL) {
1986                 ret = tcc_load_object_file(s1, fd, 0);
1987             } else if (ehdr.e_type == ET_DYN) {
1988                 if (s1->output_type == TCC_OUTPUT_MEMORY) {
1989 #ifdef TCC_TARGET_PE
1990                     ret = -1;
1991 #else
1992                     void *h;
1993                     h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1994                     if (h)
1995                         ret = 0;
1996                     else
1997                         ret = -1;
1998 #endif
1999                 } else {
2000                     ret = tcc_load_dll(s1, fd, filename,
2001                                        (flags & AFF_REFERENCED_DLL) != 0);
2002                 }
2003             } else {
2004                 error_noabort("unrecognized ELF file");
2005                 goto fail;
2006             }
2007         } else if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
2008             file->line_num = 0; /* do not display line number if error */
2009             ret = tcc_load_archive(s1, fd);
2010         } else
2011 #ifdef TCC_TARGET_COFF
2012         if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
2013             ret = tcc_load_coff(s1, fd);
2014         } else
2015 #endif
2016 #ifdef TCC_TARGET_PE
2017         if (pe_test_res_file(&ehdr, ret)) {
2018             ret = pe_load_res_file(s1, fd);
2019         } else
2020 #endif
2021         {
2022             /* as GNU ld, consider it is an ld script if not recognized */
2023         try_load_script:
2024             ret = tcc_load_ldscript(s1);
2025             if (ret < 0) {
2026                 error_noabort("unrecognized file type");
2027                 goto fail;
2028             }
2029         }
2030     }
2031  the_end:
2032     tcc_close(file);
2033  fail1:
2034     file = saved_file;
2035     return ret;
2036  fail:
2037     ret = -1;
2038     goto the_end;
2039 }
2040
2041 int tcc_add_file(TCCState *s, const char *filename)
2042 {
2043     if (s->output_type == TCC_OUTPUT_PREPROCESS)
2044         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS);
2045     else
2046         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR);
2047 }
2048
2049 int tcc_add_library_path(TCCState *s, const char *pathname)
2050 {
2051     char *pathname1;
2052
2053     pathname1 = tcc_strdup(pathname);
2054     dynarray_add((void ***)&s->library_paths, &s->nb_library_paths, pathname1);
2055     return 0;
2056 }
2057
2058 /* find and load a dll. Return non zero if not found */
2059 /* XXX: add '-rpath' option support ? */
2060 static int tcc_add_dll(TCCState *s, const char *filename, int flags)
2061 {
2062     char buf[1024];
2063     int i;
2064
2065     for(i = 0; i < s->nb_library_paths; i++) {
2066         snprintf(buf, sizeof(buf), "%s/%s",
2067                  s->library_paths[i], filename);
2068         if (tcc_add_file_internal(s, buf, flags) == 0)
2069             return 0;
2070     }
2071     return -1;
2072 }
2073
2074 /* the library name is the same as the argument of the '-l' option */
2075 int tcc_add_library(TCCState *s, const char *libraryname)
2076 {
2077     char buf[1024];
2078     int i;
2079
2080     /* first we look for the dynamic library if not static linking */
2081     if (!s->static_link) {
2082 #ifdef TCC_TARGET_PE
2083         snprintf(buf, sizeof(buf), "%s.def", libraryname);
2084 #else
2085         snprintf(buf, sizeof(buf), "lib%s.so", libraryname);
2086 #endif
2087         if (tcc_add_dll(s, buf, 0) == 0)
2088             return 0;
2089     }
2090
2091     /* then we look for the static library */
2092     for(i = 0; i < s->nb_library_paths; i++) {
2093         snprintf(buf, sizeof(buf), "%s/lib%s.a",
2094                  s->library_paths[i], libraryname);
2095         if (tcc_add_file_internal(s, buf, 0) == 0)
2096             return 0;
2097     }
2098     return -1;
2099 }
2100
2101 int tcc_add_symbol(TCCState *s, const char *name, void *val)
2102 {
2103     add_elf_sym(symtab_section, (unsigned long)val, 0,
2104                 ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
2105                 SHN_ABS, name);
2106     return 0;
2107 }
2108
2109 int tcc_set_output_type(TCCState *s, int output_type)
2110 {
2111     char buf[1024];
2112
2113     s->output_type = output_type;
2114
2115     if (!s->nostdinc) {
2116         /* default include paths */
2117         /* XXX: reverse order needed if -isystem support */
2118 #ifndef TCC_TARGET_PE
2119         tcc_add_sysinclude_path(s, CONFIG_SYSROOT "/usr/local/include");
2120         tcc_add_sysinclude_path(s, CONFIG_SYSROOT "/usr/include");
2121 #endif
2122         snprintf(buf, sizeof(buf), "%s/include", s->tcc_lib_path);
2123         tcc_add_sysinclude_path(s, buf);
2124 #ifdef TCC_TARGET_PE
2125         snprintf(buf, sizeof(buf), "%s/include/winapi", s->tcc_lib_path);
2126         tcc_add_sysinclude_path(s, buf);
2127 #endif
2128     }
2129
2130     /* if bound checking, then add corresponding sections */
2131 #ifdef CONFIG_TCC_BCHECK
2132     if (s->do_bounds_check) {
2133         /* define symbol */
2134         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
2135         /* create bounds sections */
2136         bounds_section = new_section(s, ".bounds",
2137                                      SHT_PROGBITS, SHF_ALLOC);
2138         lbounds_section = new_section(s, ".lbounds",
2139                                       SHT_PROGBITS, SHF_ALLOC);
2140     }
2141 #endif
2142
2143     if (s->char_is_unsigned) {
2144         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
2145     }
2146
2147     /* add debug sections */
2148     if (s->do_debug) {
2149         /* stab symbols */
2150         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
2151         stab_section->sh_entsize = sizeof(Stab_Sym);
2152         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
2153         put_elf_str(stabstr_section, "");
2154         stab_section->link = stabstr_section;
2155         /* put first entry */
2156         put_stabs("", 0, 0, 0, 0);
2157     }
2158
2159     /* add libc crt1/crti objects */
2160 #ifndef TCC_TARGET_PE
2161     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
2162         !s->nostdlib) {
2163         if (output_type != TCC_OUTPUT_DLL)
2164             tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crt1.o");
2165         tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crti.o");
2166     }
2167 #endif
2168
2169 #ifdef TCC_TARGET_PE
2170     snprintf(buf, sizeof(buf), "%s/lib", s->tcc_lib_path);
2171     tcc_add_library_path(s, buf);
2172 #endif
2173
2174     return 0;
2175 }
2176
2177 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
2178 #define FD_INVERT 0x0002 /* invert value before storing */
2179
2180 typedef struct FlagDef {
2181     uint16_t offset;
2182     uint16_t flags;
2183     const char *name;
2184 } FlagDef;
2185
2186 static const FlagDef warning_defs[] = {
2187     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
2188     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
2189     { offsetof(TCCState, warn_error), 0, "error" },
2190     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
2191       "implicit-function-declaration" },
2192 };
2193
2194 static int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
2195                     const char *name, int value)
2196 {
2197     int i;
2198     const FlagDef *p;
2199     const char *r;
2200
2201     r = name;
2202     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
2203         r += 3;
2204         value = !value;
2205     }
2206     for(i = 0, p = flags; i < nb_flags; i++, p++) {
2207         if (!strcmp(r, p->name))
2208             goto found;
2209     }
2210     return -1;
2211  found:
2212     if (p->flags & FD_INVERT)
2213         value = !value;
2214     *(int *)((uint8_t *)s + p->offset) = value;
2215     return 0;
2216 }
2217
2218
2219 /* set/reset a warning */
2220 int tcc_set_warning(TCCState *s, const char *warning_name, int value)
2221 {
2222     int i;
2223     const FlagDef *p;
2224
2225     if (!strcmp(warning_name, "all")) {
2226         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
2227             if (p->flags & WD_ALL)
2228                 *(int *)((uint8_t *)s + p->offset) = 1;
2229         }
2230         return 0;
2231     } else {
2232         return set_flag(s, warning_defs, countof(warning_defs),
2233                         warning_name, value);
2234     }
2235 }
2236
2237 static const FlagDef flag_defs[] = {
2238     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
2239     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
2240     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
2241     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
2242 };
2243
2244 /* set/reset a flag */
2245 int tcc_set_flag(TCCState *s, const char *flag_name, int value)
2246 {
2247     return set_flag(s, flag_defs, countof(flag_defs),
2248                     flag_name, value);
2249 }
2250
2251 /* set CONFIG_TCCDIR at runtime */
2252 void tcc_set_lib_path(TCCState *s, const char *path)
2253 {
2254     s->tcc_lib_path = tcc_strdup(path);
2255 }
2256
2257 void tcc_print_stats(TCCState *s, int64_t total_time)
2258 {
2259     double tt;
2260     tt = (double)total_time / 1000000.0;
2261     if (tt < 0.001)
2262         tt = 0.001;
2263     if (total_bytes < 1)
2264         total_bytes = 1;
2265     printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
2266            tok_ident - TOK_IDENT, total_lines, total_bytes,
2267            tt, (int)(total_lines / tt),
2268            total_bytes / tt / 1000000.0);
2269 }