libtcc.c

   1 /*
   2  *  TCC - Tiny C Compiler
   3  *
   4  *  Copyright (c) 2001-2004 Fabrice Bellard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "tcc.h"
  22
  23 /********************************************************/
  24 /* global variables */
  25
  26 /* display benchmark infos */
  27 int total_lines;
  28 int total_bytes;
  29
  30 /* parser */
  31 static struct BufferedFile *file;
  32 static int ch, tok;
  33 static CValue tokc;
  34 static CString tokcstr; /* current parsed string, if any */
  35 /* additional informations about token */
  36 static int tok_flags;
  37 #define TOK_FLAG_BOL   0x0001 /* beginning of line before */
  38 #define TOK_FLAG_BOF   0x0002 /* beginning of file before */
  39 #define TOK_FLAG_ENDIF 0x0004 /* a endif was found matching starting #ifdef */
  40 #define TOK_FLAG_EOF   0x0008 /* end of file */
  41
  42 static int *macro_ptr, *macro_ptr_allocated;
  43 static int *unget_saved_macro_ptr;
  44 static int unget_saved_buffer[TOK_MAX_SIZE + 1];
  45 static int unget_buffer_enabled;
  46 static int parse_flags;
  47 #define PARSE_FLAG_PREPROCESS 0x0001 /* activate preprocessing */
  48 #define PARSE_FLAG_TOK_NUM    0x0002 /* return numbers instead of TOK_PPNUM */
  49 #define PARSE_FLAG_LINEFEED   0x0004 /* line feed is returned as a
  50                                         token. line feed is also
  51                                         returned at eof */
  52 #define PARSE_FLAG_ASM_COMMENTS 0x0008 /* '#' can be used for line comment */
  53 #define PARSE_FLAG_SPACES     0x0010 /* next() returns space tokens (for -E) */
  54
  55 static Section *text_section, *data_section, *bss_section; /* predefined sections */
  56 static Section *cur_text_section; /* current section where function code is
  57                               generated */
  58 #ifdef CONFIG_TCC_ASM
  59 static Section *last_text_section; /* to handle .previous asm directive */
  60 #endif
  61 /* bound check related sections */
  62 static Section *bounds_section; /* contains global data bound description */
  63 static Section *lbounds_section; /* contains local data bound description */
  64 /* symbol sections */
  65 static Section *symtab_section, *strtab_section;
  66
  67 /* debug sections */
  68 static Section *stab_section, *stabstr_section;
  69
  70 /* loc : local variable index
  71    ind : output code index
  72    rsym: return symbol
  73    anon_sym: anonymous symbol index
  74 */
  75 static int rsym, anon_sym, ind, loc;
  76 /* expression generation modifiers */
  77 static int const_wanted; /* true if constant wanted */
  78 static int nocode_wanted; /* true if no code generation wanted for an expression */
  79 static int global_expr;  /* true if compound literals must be allocated
  80                             globally (used during initializers parsing */
  81 static CType func_vt; /* current function return type (used by return
  82                          instruction) */
  83 static int func_vc;
  84 static int last_line_num, last_ind, func_ind; /* debug last line number and pc */
  85 static int tok_ident;
  86 static TokenSym **table_ident;
  87 static TokenSym *hash_ident[TOK_HASH_SIZE];
  88 static char token_buf[STRING_MAX_SIZE + 1];
  89 static char *funcname;
  90 static Sym *global_stack, *local_stack;
  91 static Sym *define_stack;
  92 static Sym *global_label_stack, *local_label_stack;
  93 /* symbol allocator */
  94 #define SYM_POOL_NB (8192 / sizeof(Sym))
  95 static Sym *sym_free_first;
  96 static void **sym_pools;
  97 static int nb_sym_pools;
  98
  99 static SValue vstack[VSTACK_SIZE], *vtop;
 100 /* some predefined types */
 101 static CType char_pointer_type, func_old_type, int_type;
 102
 103 /* use GNU C extensions */
 104 static int gnu_ext = 1;
 105
 106 /* use Tiny C extensions */
 107 static int tcc_ext = 1;
 108
 109 /* max number of callers shown if error */
 110 #ifdef CONFIG_TCC_BACKTRACE
 111 int num_callers = 6;
 112 const char **rt_bound_error_msg;
 113 unsigned long rt_prog_main;
 114 #endif
 115
 116 /* XXX: get rid of this ASAP */
 117 static struct TCCState *tcc_state;
 118
 119 /********************************************************/
 120 /* function prototypes */
 121
 122 /* tccpp.c */
 123 static void next(void);
 124 char *get_tok_str(int v, CValue *cv);
 125
 126 /* tccgen.c */
 127 static void parse_expr_type(CType *type);
 128 static void expr_type(CType *type);
 129 static void unary_type(CType *type);
 130 static void block(int *bsym, int *csym, int *case_sym, int *def_sym,
 131                   int case_reg, int is_expr);
 132 static int expr_const(void);
 133 static void expr_eq(void);
 134 static void gexpr(void);
 135 static void gen_inline_functions(void);
 136 static void decl(int l);
 137 static void decl_initializer(CType *type, Section *sec, unsigned long c,
 138                              int first, int size_only);
 139 static void decl_initializer_alloc(CType *type, AttributeDef *ad, int r,
 140                                    int has_init, int v, int scope);
 141 int gv(int rc);
 142 void gv2(int rc1, int rc2);
 143 void move_reg(int r, int s);
 144 void save_regs(int n);
 145 void save_reg(int r);
 146 void vpop(void);
 147 void vswap(void);
 148 void vdup(void);
 149 int get_reg(int rc);
 150 int get_reg_ex(int rc,int rc2);
 151
 152 void gen_op(int op);
 153 void force_charshort_cast(int t);
 154 static void gen_cast(CType *type);
 155 void vstore(void);
 156 static Sym *sym_find(int v);
 157 static Sym *sym_push(int v, CType *type, int r, int c);
 158
 159 /* type handling */
 160 static int type_size(CType *type, int *a);
 161 static inline CType *pointed_type(CType *type);
 162 static int pointed_size(CType *type);
 163 static int lvalue_type(int t);
 164 static int parse_btype(CType *type, AttributeDef *ad);
 165 static void type_decl(CType *type, AttributeDef *ad, int *v, int td);
 166 static int compare_types(CType *type1, CType *type2, int unqualified);
 167 static int is_compatible_types(CType *type1, CType *type2);
 168 static int is_compatible_parameter_types(CType *type1, CType *type2);
 169
 170 int ieee_finite(double d);
 171 void vpushi(int v);
 172 void vpushll(long long v);
 173 void vrott(int n);
 174 void vnrott(int n);
 175 void lexpand_nr(void);
 176 static void vpush_global_sym(CType *type, int v);
 177 void vset(CType *type, int r, int v);
 178 void type_to_str(char *buf, int buf_size,
 179                  CType *type, const char *varstr);
 180 static Sym *get_sym_ref(CType *type, Section *sec,
 181                         unsigned long offset, unsigned long size);
 182 static Sym *external_global_sym(int v, CType *type, int r);
 183
 184 /* section generation */
 185 static void section_realloc(Section *sec, unsigned long new_size);
 186 static void *section_ptr_add(Section *sec, unsigned long size);
 187 static void put_extern_sym(Sym *sym, Section *section,
 188                            unsigned long value, unsigned long size);
 189 static void greloc(Section *s, Sym *sym, unsigned long addr, int type);
 190 static int put_elf_str(Section *s, const char *sym);
 191 static int put_elf_sym(Section *s,
 192                        unsigned long value, unsigned long size,
 193                        int info, int other, int shndx, const char *name);
 194 static int add_elf_sym(Section *s, uplong value, unsigned long size,
 195                        int info, int other, int sh_num, const char *name);
 196 static void put_elf_reloc(Section *symtab, Section *s, unsigned long offset,
 197                           int type, int symbol);
 198 static void put_stabs(const char *str, int type, int other, int desc,
 199                       unsigned long value);
 200 static void put_stabs_r(const char *str, int type, int other, int desc,
 201                         unsigned long value, Section *sec, int sym_index);
 202 static void put_stabn(int type, int other, int desc, int value);
 203 static void put_stabd(int type, int other, int desc);
 204 static int tcc_add_dll(TCCState *s, const char *filename, int flags);
 205
 206 #define AFF_PRINT_ERROR     0x0001 /* print error if file not found */
 207 #define AFF_REFERENCED_DLL  0x0002 /* load a referenced dll from another dll */
 208 #define AFF_PREPROCESS      0x0004 /* preprocess file */
 209 static int tcc_add_file_internal(TCCState *s, const char *filename, int flags);
 210
 211 /* tcccoff.c */
 212 int tcc_output_coff(TCCState *s1, FILE *f);
 213
 214 /* tccpe.c */
 215 int pe_load_file(struct TCCState *s1, const char *filename, int fd);
 216 int pe_output_file(struct TCCState *s1, const char *filename);
 217 int pe_dllimport(int r, SValue *sv, void (*fn)(int r, SValue *sv));
 218
 219 /* tccasm.c */
 220 #ifdef CONFIG_TCC_ASM
 221 static void asm_expr(TCCState *s1, ExprValue *pe);
 222 static int asm_int_expr(TCCState *s1);
 223 static int find_constraint(ASMOperand *operands, int nb_operands,
 224                            const char *name, const char **pp);
 225
 226 static int tcc_assemble(TCCState *s1, int do_preprocess);
 227 #endif
 228
 229 static void asm_instr(void);
 230 static void asm_global_instr(void);
 231
 232 /********************************************************/
 233 /* libtcc.c */
 234
 235 static Sym *__sym_malloc(void);
 236 static inline Sym *sym_malloc(void);
 237 static inline void sym_free(Sym *sym);
 238 Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags);
 239 static void free_section(Section *s);
 240 static void section_realloc(Section *sec, unsigned long new_size);
 241 static void *section_ptr_add(Section *sec, unsigned long size);
 242 Section *find_section(TCCState *s1, const char *name);
 243 static void put_extern_sym2(
 244     Sym *sym, Section *section,
 245     unsigned long value, unsigned long size, int can_add_underscore);
 246 static void put_extern_sym(
 247     Sym *sym, Section *section,
 248     unsigned long value, unsigned long size);
 249 static void greloc(Section *s, Sym *sym, unsigned long offset, int type);
 250
 251 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap);
 252 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...);
 253
 254 /* CString handling */
 255 static void cstr_realloc(CString *cstr, int new_size);
 256 static inline void cstr_ccat(CString *cstr, int ch);
 257 static void cstr_cat(CString *cstr, const char *str);
 258 static void cstr_wccat(CString *cstr, int ch);
 259 static void cstr_new(CString *cstr);
 260 static void cstr_free(CString *cstr);
 261 #define cstr_reset(cstr) cstr_free(cstr)
 262 static void add_char(CString *cstr, int c);
 263
 264 static Sym *sym_push2(Sym **ps, int v, int t, long c);
 265 static Sym *sym_find2(Sym *s, int v);
 266 static inline Sym *struct_find(int v);
 267 static inline Sym *sym_find(int v);
 268 static Sym *sym_push(int v, CType *type, int r, int c);
 269 static Sym *global_identifier_push(int v, int t, int c);
 270 static void sym_pop(Sym **ptop, Sym *b);
 271
 272 BufferedFile *tcc_open(TCCState *s1, const char *filename);
 273 void tcc_close(BufferedFile *bf);
 274 static int tcc_compile(TCCState *s1);
 275
 276 void expect(const char *msg);
 277 void skip(int c);
 278 static void test_lvalue(void);
 279 void *resolve_sym(TCCState *s1, const char *sym);
 280
 281 static inline int isid(int c)
 282 {
 283     return (c >= 'a' && c <= 'z')
 284         || (c >= 'A' && c <= 'Z')
 285         || c == '_';
 286 }
 287
 288 static inline int isnum(int c)
 289 {
 290     return c >= '0' && c <= '9';
 291 }
 292
 293 static inline int isoct(int c)
 294 {
 295     return c >= '0' && c <= '7';
 296 }
 297
 298 static inline int toup(int c)
 299 {
 300     if (c >= 'a' && c <= 'z')
 301         return c - 'a' + 'A';
 302     else
 303         return c;
 304 }
 305
 306 /********************************************************/
 307
 308 #ifdef TCC_TARGET_I386
 309 #include "i386-gen.c"
 310 #endif
 311
 312 #ifdef TCC_TARGET_ARM
 313 #include "arm-gen.c"
 314 #endif
 315
 316 #ifdef TCC_TARGET_C67
 317 #include "c67-gen.c"
 318 #endif
 319
 320 #ifdef TCC_TARGET_X86_64
 321 #include "x86_64-gen.c"
 322 #endif
 323
 324 #include "tccpp.c"
 325 #include "tccgen.c"
 326
 327 #ifdef CONFIG_TCC_ASM
 328
 329 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
 330 #include "i386-asm.c"
 331 #endif
 332
 333 #include "tccasm.c"
 334 #else
 335 static void asm_instr(void)
 336 {
 337     error("inline asm() not supported");
 338 }
 339 static void asm_global_instr(void)
 340 {
 341     error("inline asm() not supported");
 342 }
 343 #endif
 344
 345 #include "tccelf.c"
 346
 347 #ifdef TCC_TARGET_COFF
 348 #include "tcccoff.c"
 349 #endif
 350
 351 #ifdef TCC_TARGET_PE
 352 #include "tccpe.c"
 353 #endif
 354
 355 /********************************************************/
 356 #ifdef _WIN32
 357 char *normalize_slashes(char *path)
 358 {
 359     char *p;
 360     for (p = path; *p; ++p)
 361         if (*p == '\\')
 362             *p = '/';
 363     return path;
 364 }
 365
 366 HMODULE tcc_module;
 367
 368 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
 369 void tcc_set_lib_path_w32(TCCState *s)
 370 {
 371     char path[1024], *p;
 372     GetModuleFileNameA(tcc_module, path, sizeof path);
 373     p = tcc_basename(normalize_slashes(strlwr(path)));
 374     if (p - 5 > path && 0 == strncmp(p - 5, "/bin/", 5))
 375         p -= 5;
 376     else if (p > path)
 377         p--;
 378     *p = 0;
 379     tcc_set_lib_path(s, path);
 380 }
 381
 382 #ifdef LIBTCC_AS_DLL
 383 BOOL WINAPI DllMain (HANDLE hDll, DWORD dwReason, LPVOID lpReserved)
 384 {
 385     if (DLL_PROCESS_ATTACH == dwReason)
 386         tcc_module = hDll;
 387     return TRUE;
 388 }
 389 #endif
 390 #endif
 391
 392 /********************************************************/
 393 #ifdef CONFIG_TCC_STATIC
 394
 395 #define RTLD_LAZY       0x001
 396 #define RTLD_NOW        0x002
 397 #define RTLD_GLOBAL     0x100
 398 #define RTLD_DEFAULT    NULL
 399
 400 /* dummy function for profiling */
 401 void *dlopen(const char *filename, int flag)
 402 {
 403     return NULL;
 404 }
 405
 406 void dlclose(void *p)
 407 {
 408 }
 409
 410 const char *dlerror(void)
 411 {
 412     return "error";
 413 }
 414
 415 typedef struct TCCSyms {
 416     char *str;
 417     void *ptr;
 418 } TCCSyms;
 419
 420 #define TCCSYM(a) { #a, &a, },
 421
 422 /* add the symbol you want here if no dynamic linking is done */
 423 static TCCSyms tcc_syms[] = {
 424 #if !defined(CONFIG_TCCBOOT)
 425     TCCSYM(printf)
 426     TCCSYM(fprintf)
 427     TCCSYM(fopen)
 428     TCCSYM(fclose)
 429 #endif
 430     { NULL, NULL },
 431 };
 432
 433 void *resolve_sym(TCCState *s1, const char *symbol)
 434 {
 435     TCCSyms *p;
 436     p = tcc_syms;
 437     while (p->str != NULL) {
 438         if (!strcmp(p->str, symbol))
 439             return p->ptr;
 440         p++;
 441     }
 442     return NULL;
 443 }
 444
 445 #elif defined(_WIN32)
 446 #define dlclose FreeLibrary
 447
 448 #else
 449 #include <dlfcn.h>
 450
 451 void *resolve_sym(TCCState *s1, const char *sym)
 452 {
 453     return dlsym(RTLD_DEFAULT, sym);
 454 }
 455
 456 #endif
 457
 458 /********************************************************/
 459
 460 /* we use our own 'finite' function to avoid potential problems with
 461    non standard math libs */
 462 /* XXX: endianness dependent */
 463 int ieee_finite(double d)
 464 {
 465     int *p = (int *)&d;
 466     return ((unsigned)((p[1] | 0x800fffff) + 1)) >> 31;
 467 }
 468
 469 /* copy a string and truncate it. */
 470 char *pstrcpy(char *buf, int buf_size, const char *s)
 471 {
 472     char *q, *q_end;
 473     int c;
 474
 475     if (buf_size > 0) {
 476         q = buf;
 477         q_end = buf + buf_size - 1;
 478         while (q < q_end) {
 479             c = *s++;
 480             if (c == '\0')
 481                 break;
 482             *q++ = c;
 483         }
 484         *q = '\0';
 485     }
 486     return buf;
 487 }
 488
 489 /* strcat and truncate. */
 490 char *pstrcat(char *buf, int buf_size, const char *s)
 491 {
 492     int len;
 493     len = strlen(buf);
 494     if (len < buf_size)
 495         pstrcpy(buf + len, buf_size - len, s);
 496     return buf;
 497 }
 498
 499 /* extract the basename of a file */
 500 char *tcc_basename(const char *name)
 501 {
 502     char *p = strchr(name, 0);
 503     while (p > name && !IS_PATHSEP(p[-1]))
 504         --p;
 505     return p;
 506 }
 507
 508 char *tcc_fileextension (const char *name)
 509 {
 510     char *b = tcc_basename(name);
 511     char *e = strrchr(b, '.');
 512     return e ? e : strchr(b, 0);
 513 }
 514
 515 void set_pages_executable(void *ptr, unsigned long length)
 516 {
 517 #ifdef _WIN32
 518     unsigned long old_protect;
 519     VirtualProtect(ptr, length, PAGE_EXECUTE_READWRITE, &old_protect);
 520 #else
 521     unsigned long start, end;
 522     start = (unsigned long)ptr & ~(PAGESIZE - 1);
 523     end = (unsigned long)ptr + length;
 524     end = (end + PAGESIZE - 1) & ~(PAGESIZE - 1);
 525     mprotect((void *)start, end - start, PROT_READ | PROT_WRITE | PROT_EXEC);
 526 #endif
 527 }
 528
 529 /* memory management */
 530 #ifdef MEM_DEBUG
 531 int mem_cur_size;
 532 int mem_max_size;
 533 unsigned malloc_usable_size(void*);
 534 #endif
 535
 536 void tcc_free(void *ptr)
 537 {
 538 #ifdef MEM_DEBUG
 539     mem_cur_size -= malloc_usable_size(ptr);
 540 #endif
 541     free(ptr);
 542 }
 543
 544 void *tcc_malloc(unsigned long size)
 545 {
 546     void *ptr;
 547     ptr = malloc(size);
 548     if (!ptr && size)
 549         error("memory full");
 550 #ifdef MEM_DEBUG
 551     mem_cur_size += malloc_usable_size(ptr);
 552     if (mem_cur_size > mem_max_size)
 553         mem_max_size = mem_cur_size;
 554 #endif
 555     return ptr;
 556 }
 557
 558 void *tcc_mallocz(unsigned long size)
 559 {
 560     void *ptr;
 561     ptr = tcc_malloc(size);
 562     memset(ptr, 0, size);
 563     return ptr;
 564 }
 565
 566 void *tcc_realloc(void *ptr, unsigned long size)
 567 {
 568     void *ptr1;
 569 #ifdef MEM_DEBUG
 570     mem_cur_size -= malloc_usable_size(ptr);
 571 #endif
 572     ptr1 = realloc(ptr, size);
 573 #ifdef MEM_DEBUG
 574     /* NOTE: count not correct if alloc error, but not critical */
 575     mem_cur_size += malloc_usable_size(ptr1);
 576     if (mem_cur_size > mem_max_size)
 577         mem_max_size = mem_cur_size;
 578 #endif
 579     return ptr1;
 580 }
 581
 582 char *tcc_strdup(const char *str)
 583 {
 584     char *ptr;
 585     ptr = tcc_malloc(strlen(str) + 1);
 586     strcpy(ptr, str);
 587     return ptr;
 588 }
 589
 590 #define free(p) use_tcc_free(p)
 591 #define malloc(s) use_tcc_malloc(s)
 592 #define realloc(p, s) use_tcc_realloc(p, s)
 593
 594 void dynarray_add(void ***ptab, int *nb_ptr, void *data)
 595 {
 596     int nb, nb_alloc;
 597     void **pp;
 598
 599     nb = *nb_ptr;
 600     pp = *ptab;
 601     /* every power of two we double array size */
 602     if ((nb & (nb - 1)) == 0) {
 603         if (!nb)
 604             nb_alloc = 1;
 605         else
 606             nb_alloc = nb * 2;
 607         pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
 608         if (!pp)
 609             error("memory full");
 610         *ptab = pp;
 611     }
 612     pp[nb++] = data;
 613     *nb_ptr = nb;
 614 }
 615
 616 void dynarray_reset(void *pp, int *n)
 617 {
 618     void **p;
 619     for (p = *(void***)pp; *n; ++p, --*n)
 620         if (*p)
 621             tcc_free(*p);
 622     tcc_free(*(void**)pp);
 623     *(void**)pp = NULL;
 624 }
 625
 626 /* symbol allocator */
 627 static Sym *__sym_malloc(void)
 628 {
 629     Sym *sym_pool, *sym, *last_sym;
 630     int i;
 631
 632     sym_pool = tcc_malloc(SYM_POOL_NB * sizeof(Sym));
 633     dynarray_add(&sym_pools, &nb_sym_pools, sym_pool);
 634
 635     last_sym = sym_free_first;
 636     sym = sym_pool;
 637     for(i = 0; i < SYM_POOL_NB; i++) {
 638         sym->next = last_sym;
 639         last_sym = sym;
 640         sym++;
 641     }
 642     sym_free_first = last_sym;
 643     return last_sym;
 644 }
 645
 646 static inline Sym *sym_malloc(void)
 647 {
 648     Sym *sym;
 649     sym = sym_free_first;
 650     if (!sym)
 651         sym = __sym_malloc();
 652     sym_free_first = sym->next;
 653     return sym;
 654 }
 655
 656 static inline void sym_free(Sym *sym)
 657 {
 658     sym->next = sym_free_first;
 659     sym_free_first = sym;
 660 }
 661
 662 Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags)
 663 {
 664     Section *sec;
 665
 666     sec = tcc_mallocz(sizeof(Section) + strlen(name));
 667     strcpy(sec->name, name);
 668     sec->sh_type = sh_type;
 669     sec->sh_flags = sh_flags;
 670     switch(sh_type) {
 671     case SHT_HASH:
 672     case SHT_REL:
 673     case SHT_RELA:
 674     case SHT_DYNSYM:
 675     case SHT_SYMTAB:
 676     case SHT_DYNAMIC:
 677         sec->sh_addralign = 4;
 678         break;
 679     case SHT_STRTAB:
 680         sec->sh_addralign = 1;
 681         break;
 682     default:
 683         sec->sh_addralign = 32; /* default conservative alignment */
 684         break;
 685     }
 686
 687     if (sh_flags & SHF_PRIVATE) {
 688         dynarray_add((void ***)&s1->priv_sections, &s1->nb_priv_sections, sec);
 689     } else {
 690         sec->sh_num = s1->nb_sections;
 691         dynarray_add((void ***)&s1->sections, &s1->nb_sections, sec);
 692     }
 693
 694     return sec;
 695 }
 696
 697 static void free_section(Section *s)
 698 {
 699     tcc_free(s->data);
 700 }
 701
 702 /* realloc section and set its content to zero */
 703 static void section_realloc(Section *sec, unsigned long new_size)
 704 {
 705     unsigned long size;
 706     unsigned char *data;
 707
 708     size = sec->data_allocated;
 709     if (size == 0)
 710         size = 1;
 711     while (size < new_size)
 712         size = size * 2;
 713     data = tcc_realloc(sec->data, size);
 714     if (!data)
 715         error("memory full");
 716     memset(data + sec->data_allocated, 0, size - sec->data_allocated);
 717     sec->data = data;
 718     sec->data_allocated = size;
 719 }
 720
 721 /* reserve at least 'size' bytes in section 'sec' from
 722    sec->data_offset. */
 723 static void *section_ptr_add(Section *sec, unsigned long size)
 724 {
 725     unsigned long offset, offset1;
 726
 727     offset = sec->data_offset;
 728     offset1 = offset + size;
 729     if (offset1 > sec->data_allocated)
 730         section_realloc(sec, offset1);
 731     sec->data_offset = offset1;
 732     return sec->data + offset;
 733 }
 734
 735 /* return a reference to a section, and create it if it does not
 736    exists */
 737 Section *find_section(TCCState *s1, const char *name)
 738 {
 739     Section *sec;
 740     int i;
 741     for(i = 1; i < s1->nb_sections; i++) {
 742         sec = s1->sections[i];
 743         if (!strcmp(name, sec->name))
 744             return sec;
 745     }
 746     /* sections are created as PROGBITS */
 747     return new_section(s1, name, SHT_PROGBITS, SHF_ALLOC);
 748 }
 749
 750 /* update sym->c so that it points to an external symbol in section
 751    'section' with value 'value' */
 752 static void put_extern_sym2(Sym *sym, Section *section,
 753                             unsigned long value, unsigned long size,
 754                             int can_add_underscore)
 755 {
 756     int sym_type, sym_bind, sh_num, info, other, attr;
 757     ElfW(Sym) *esym;
 758     const char *name;
 759     char buf1[256];
 760
 761     if (section == NULL)
 762         sh_num = SHN_UNDEF;
 763     else if (section == SECTION_ABS)
 764         sh_num = SHN_ABS;
 765     else
 766         sh_num = section->sh_num;
 767
 768     other = attr = 0;
 769
 770     if ((sym->type.t & VT_BTYPE) == VT_FUNC) {
 771         sym_type = STT_FUNC;
 772 #ifdef TCC_TARGET_PE
 773         if (sym->type.ref)
 774             attr = sym->type.ref->r;
 775         if (FUNC_EXPORT(attr))
 776             other |= 1;
 777         if (FUNC_CALL(attr) == FUNC_STDCALL)
 778             other |= 2;
 779 #endif
 780     } else if ((sym->type.t & VT_BTYPE) == VT_VOID) {
 781         sym_type = STT_NOTYPE;
 782     } else {
 783         sym_type = STT_OBJECT;
 784 #ifdef TCC_TARGET_PE
 785         if (sym->type.t & VT_EXPORT)
 786             other |= 1;
 787 #endif
 788     }
 789
 790     if (sym->type.t & VT_STATIC)
 791         sym_bind = STB_LOCAL;
 792     else
 793         sym_bind = STB_GLOBAL;
 794
 795     if (!sym->c) {
 796         name = get_tok_str(sym->v, NULL);
 797 #ifdef CONFIG_TCC_BCHECK
 798         if (tcc_state->do_bounds_check) {
 799             char buf[32];
 800
 801             /* XXX: avoid doing that for statics ? */
 802             /* if bound checking is activated, we change some function
 803                names by adding the "__bound" prefix */
 804             switch(sym->v) {
 805 #if 0
 806             /* XXX: we rely only on malloc hooks */
 807             case TOK_malloc:
 808             case TOK_free:
 809             case TOK_realloc:
 810             case TOK_memalign:
 811             case TOK_calloc:
 812 #endif
 813             case TOK_memcpy:
 814             case TOK_memmove:
 815             case TOK_memset:
 816             case TOK_strlen:
 817             case TOK_strcpy:
 818             case TOK_alloca:
 819                 strcpy(buf, "__bound_");
 820                 strcat(buf, name);
 821                 name = buf;
 822                 break;
 823             }
 824         }
 825 #endif
 826
 827 #ifdef TCC_TARGET_PE
 828         if ((other & 2) && can_add_underscore) {
 829             sprintf(buf1, "_%s@%d", name, FUNC_ARGS(attr));
 830             name = buf1;
 831         } else
 832 #endif
 833         if (tcc_state->leading_underscore && can_add_underscore) {
 834             buf1[0] = '_';
 835             pstrcpy(buf1 + 1, sizeof(buf1) - 1, name);
 836             name = buf1;
 837         }
 838         info = ELFW(ST_INFO)(sym_bind, sym_type);
 839         sym->c = add_elf_sym(symtab_section, value, size, info, other, sh_num, name);
 840     } else {
 841         esym = &((ElfW(Sym) *)symtab_section->data)[sym->c];
 842         esym->st_value = value;
 843         esym->st_size = size;
 844         esym->st_shndx = sh_num;
 845         esym->st_other |= other;
 846     }
 847 }
 848
 849 static void put_extern_sym(Sym *sym, Section *section,
 850                            unsigned long value, unsigned long size)
 851 {
 852     put_extern_sym2(sym, section, value, size, 1);
 853 }
 854
 855 /* add a new relocation entry to symbol 'sym' in section 's' */
 856 static void greloc(Section *s, Sym *sym, unsigned long offset, int type)
 857 {
 858     int c = 0;
 859     if (sym) {
 860         if (0 == sym->c)
 861             put_extern_sym(sym, NULL, 0, 0);
 862         c = sym->c;
 863     }
 864     /* now we can add ELF relocation info */
 865     put_elf_reloc(symtab_section, s, offset, type, c);
 866 }
 867
 868 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
 869 {
 870     int len;
 871     len = strlen(buf);
 872     vsnprintf(buf + len, buf_size - len, fmt, ap);
 873 }
 874
 875 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
 876 {
 877     va_list ap;
 878     va_start(ap, fmt);
 879     strcat_vprintf(buf, buf_size, fmt, ap);
 880     va_end(ap);
 881 }
 882
 883 void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
 884 {
 885     char buf[2048];
 886     BufferedFile **f;
 887
 888     buf[0] = '\0';
 889     if (file) {
 890         for(f = s1->include_stack; f < s1->include_stack_ptr; f++)
 891             strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
 892                           (*f)->filename, (*f)->line_num);
 893         if (file->line_num > 0) {
 894             strcat_printf(buf, sizeof(buf),
 895                           "%s:%d: ", file->filename, file->line_num);
 896         } else {
 897             strcat_printf(buf, sizeof(buf),
 898                           "%s: ", file->filename);
 899         }
 900     } else {
 901         strcat_printf(buf, sizeof(buf),
 902                       "tcc: ");
 903     }
 904     if (is_warning)
 905         strcat_printf(buf, sizeof(buf), "warning: ");
 906     else
 907         strcat_printf(buf, sizeof(buf), "error: ");
 908     strcat_vprintf(buf, sizeof(buf), fmt, ap);
 909
 910     if (!s1->error_func) {
 911         /* default case: stderr */
 912         fprintf(stderr, "%s\n", buf);
 913     } else {
 914         s1->error_func(s1->error_opaque, buf);
 915     }
 916     if (!is_warning || s1->warn_error)
 917         s1->nb_errors++;
 918 }
 919
 920 void tcc_set_error_func(TCCState *s, void *error_opaque,
 921                         void (*error_func)(void *opaque, const char *msg))
 922 {
 923     s->error_opaque = error_opaque;
 924     s->error_func = error_func;
 925 }
 926
 927 /* error without aborting current compilation */
 928 void error_noabort(const char *fmt, ...)
 929 {
 930     TCCState *s1 = tcc_state;
 931     va_list ap;
 932
 933     va_start(ap, fmt);
 934     error1(s1, 0, fmt, ap);
 935     va_end(ap);
 936 }
 937
 938 void error(const char *fmt, ...)
 939 {
 940     TCCState *s1 = tcc_state;
 941     va_list ap;
 942
 943     va_start(ap, fmt);
 944     error1(s1, 0, fmt, ap);
 945     va_end(ap);
 946     /* better than nothing: in some cases, we accept to handle errors */
 947     if (s1->error_set_jmp_enabled) {
 948         longjmp(s1->error_jmp_buf, 1);
 949     } else {
 950         /* XXX: eliminate this someday */
 951         exit(1);
 952     }
 953 }
 954
 955 void expect(const char *msg)
 956 {
 957     error("%s expected", msg);
 958 }
 959
 960 void warning(const char *fmt, ...)
 961 {
 962     TCCState *s1 = tcc_state;
 963     va_list ap;
 964
 965     if (s1->warn_none)
 966         return;
 967
 968     va_start(ap, fmt);
 969     error1(s1, 1, fmt, ap);
 970     va_end(ap);
 971 }
 972
 973 void skip(int c)
 974 {
 975     if (tok != c)
 976         error("'%c' expected", c);
 977     next();
 978 }
 979
 980 static void test_lvalue(void)
 981 {
 982     if (!(vtop->r & VT_LVAL))
 983         expect("lvalue");
 984 }
 985
 986 /* CString handling */
 987
 988 static void cstr_realloc(CString *cstr, int new_size)
 989 {
 990     int size;
 991     void *data;
 992
 993     size = cstr->size_allocated;
 994     if (size == 0)
 995         size = 8; /* no need to allocate a too small first string */
 996     while (size < new_size)
 997         size = size * 2;
 998     data = tcc_realloc(cstr->data_allocated, size);
 999     if (!data)
1000         error("memory full");
1001     cstr->data_allocated = data;
1002     cstr->size_allocated = size;
1003     cstr->data = data;
1004 }
1005
1006 /* add a byte */
1007 static inline void cstr_ccat(CString *cstr, int ch)
1008 {
1009     int size;
1010     size = cstr->size + 1;
1011     if (size > cstr->size_allocated)
1012         cstr_realloc(cstr, size);
1013     ((unsigned char *)cstr->data)[size - 1] = ch;
1014     cstr->size = size;
1015 }
1016
1017 static void cstr_cat(CString *cstr, const char *str)
1018 {
1019     int c;
1020     for(;;) {
1021         c = *str;
1022         if (c == '\0')
1023             break;
1024         cstr_ccat(cstr, c);
1025         str++;
1026     }
1027 }
1028
1029 /* add a wide char */
1030 static void cstr_wccat(CString *cstr, int ch)
1031 {
1032     int size;
1033     size = cstr->size + sizeof(nwchar_t);
1034     if (size > cstr->size_allocated)
1035         cstr_realloc(cstr, size);
1036     *(nwchar_t *)(((unsigned char *)cstr->data) + size - sizeof(nwchar_t)) = ch;
1037     cstr->size = size;
1038 }
1039
1040 static void cstr_new(CString *cstr)
1041 {
1042     memset(cstr, 0, sizeof(CString));
1043 }
1044
1045 /* free string and reset it to NULL */
1046 static void cstr_free(CString *cstr)
1047 {
1048     tcc_free(cstr->data_allocated);
1049     cstr_new(cstr);
1050 }
1051
1052 #define cstr_reset(cstr) cstr_free(cstr)
1053
1054 /* XXX: unicode ? */
1055 static void add_char(CString *cstr, int c)
1056 {
1057     if (c == '\'' || c == '\"' || c == '\\') {
1058         /* XXX: could be more precise if char or string */
1059         cstr_ccat(cstr, '\\');
1060     }
1061     if (c >= 32 && c <= 126) {
1062         cstr_ccat(cstr, c);
1063     } else {
1064         cstr_ccat(cstr, '\\');
1065         if (c == '\n') {
1066             cstr_ccat(cstr, 'n');
1067         } else {
1068             cstr_ccat(cstr, '0' + ((c >> 6) & 7));
1069             cstr_ccat(cstr, '0' + ((c >> 3) & 7));
1070             cstr_ccat(cstr, '0' + (c & 7));
1071         }
1072     }
1073 }
1074
1075 /* push, without hashing */
1076 static Sym *sym_push2(Sym **ps, int v, int t, long c)
1077 {
1078     Sym *s;
1079     s = sym_malloc();
1080     s->v = v;
1081     s->type.t = t;
1082     s->type.ref = NULL;
1083 #ifdef _WIN64
1084     s->d = NULL;
1085 #endif
1086     s->c = c;
1087     s->next = NULL;
1088     /* add in stack */
1089     s->prev = *ps;
1090     *ps = s;
1091     return s;
1092 }
1093
1094 /* find a symbol and return its associated structure. 's' is the top
1095    of the symbol stack */
1096 static Sym *sym_find2(Sym *s, int v)
1097 {
1098     while (s) {
1099         if (s->v == v)
1100             return s;
1101         s = s->prev;
1102     }
1103     return NULL;
1104 }
1105
1106 /* structure lookup */
1107 static inline Sym *struct_find(int v)
1108 {
1109     v -= TOK_IDENT;
1110     if ((unsigned)v >= (unsigned)(tok_ident - TOK_IDENT))
1111         return NULL;
1112     return table_ident[v]->sym_struct;
1113 }
1114
1115 /* find an identifier */
1116 static inline Sym *sym_find(int v)
1117 {
1118     v -= TOK_IDENT;
1119     if ((unsigned)v >= (unsigned)(tok_ident - TOK_IDENT))
1120         return NULL;
1121     return table_ident[v]->sym_identifier;
1122 }
1123
1124 /* push a given symbol on the symbol stack */
1125 static Sym *sym_push(int v, CType *type, int r, int c)
1126 {
1127     Sym *s, **ps;
1128     TokenSym *ts;
1129
1130     if (local_stack)
1131         ps = &local_stack;
1132     else
1133         ps = &global_stack;
1134     s = sym_push2(ps, v, type->t, c);
1135     s->type.ref = type->ref;
1136     s->r = r;
1137     /* don't record fields or anonymous symbols */
1138     /* XXX: simplify */
1139     if (!(v & SYM_FIELD) && (v & ~SYM_STRUCT) < SYM_FIRST_ANOM) {
1140         /* record symbol in token array */
1141         ts = table_ident[(v & ~SYM_STRUCT) - TOK_IDENT];
1142         if (v & SYM_STRUCT)
1143             ps = &ts->sym_struct;
1144         else
1145             ps = &ts->sym_identifier;
1146         s->prev_tok = *ps;
1147         *ps = s;
1148     }
1149     return s;
1150 }
1151
1152 /* push a global identifier */
1153 static Sym *global_identifier_push(int v, int t, int c)
1154 {
1155     Sym *s, **ps;
1156     s = sym_push2(&global_stack, v, t, c);
1157     /* don't record anonymous symbol */
1158     if (v < SYM_FIRST_ANOM) {
1159         ps = &table_ident[v - TOK_IDENT]->sym_identifier;
1160         /* modify the top most local identifier, so that
1161            sym_identifier will point to 's' when popped */
1162         while (*ps != NULL)
1163             ps = &(*ps)->prev_tok;
1164         s->prev_tok = NULL;
1165         *ps = s;
1166     }
1167     return s;
1168 }
1169
1170 /* pop symbols until top reaches 'b' */
1171 static void sym_pop(Sym **ptop, Sym *b)
1172 {
1173     Sym *s, *ss, **ps;
1174     TokenSym *ts;
1175     int v;
1176
1177     s = *ptop;
1178     while(s != b) {
1179         ss = s->prev;
1180         v = s->v;
1181         /* remove symbol in token array */
1182         /* XXX: simplify */
1183         if (!(v & SYM_FIELD) && (v & ~SYM_STRUCT) < SYM_FIRST_ANOM) {
1184             ts = table_ident[(v & ~SYM_STRUCT) - TOK_IDENT];
1185             if (v & SYM_STRUCT)
1186                 ps = &ts->sym_struct;
1187             else
1188                 ps = &ts->sym_identifier;
1189             *ps = s->prev_tok;
1190         }
1191         sym_free(s);
1192         s = ss;
1193     }
1194     *ptop = b;
1195 }
1196
1197 /* I/O layer */
1198
1199 BufferedFile *tcc_open(TCCState *s1, const char *filename)
1200 {
1201     int fd;
1202     BufferedFile *bf;
1203
1204     if (strcmp(filename, "-") == 0)
1205         fd = 0, filename = "stdin";
1206     else
1207         fd = open(filename, O_RDONLY | O_BINARY);
1208     if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
1209         printf("%s %*s%s\n", fd < 0 ? "nf":"->",
1210                (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
1211     if (fd < 0)
1212         return NULL;
1213     bf = tcc_malloc(sizeof(BufferedFile));
1214     bf->fd = fd;
1215     bf->buf_ptr = bf->buffer;
1216     bf->buf_end = bf->buffer;
1217     bf->buffer[0] = CH_EOB; /* put eob symbol */
1218     pstrcpy(bf->filename, sizeof(bf->filename), filename);
1219 #ifdef _WIN32
1220     normalize_slashes(bf->filename);
1221 #endif
1222     bf->line_num = 1;
1223     bf->ifndef_macro = 0;
1224     bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
1225     //    printf("opening '%s'\n", filename);
1226     return bf;
1227 }
1228
1229 void tcc_close(BufferedFile *bf)
1230 {
1231     total_lines += bf->line_num;
1232     close(bf->fd);
1233     tcc_free(bf);
1234 }
1235
1236 /* compile the C file opened in 'file'. Return non zero if errors. */
1237 static int tcc_compile(TCCState *s1)
1238 {
1239     Sym *define_start;
1240     char buf[512];
1241     volatile int section_sym;
1242
1243 #ifdef INC_DEBUG
1244     printf("%s: **** new file\n", file->filename);
1245 #endif
1246     preprocess_init(s1);
1247
1248     cur_text_section = NULL;
1249     funcname = "";
1250     anon_sym = SYM_FIRST_ANOM;
1251
1252     /* file info: full path + filename */
1253     section_sym = 0; /* avoid warning */
1254     if (s1->do_debug) {
1255         section_sym = put_elf_sym(symtab_section, 0, 0,
1256                                   ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
1257                                   text_section->sh_num, NULL);
1258         getcwd(buf, sizeof(buf));
1259 #ifdef _WIN32
1260         normalize_slashes(buf);
1261 #endif
1262         pstrcat(buf, sizeof(buf), "/");
1263         put_stabs_r(buf, N_SO, 0, 0,
1264                     text_section->data_offset, text_section, section_sym);
1265         put_stabs_r(file->filename, N_SO, 0, 0,
1266                     text_section->data_offset, text_section, section_sym);
1267     }
1268     /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
1269        symbols can be safely used */
1270     put_elf_sym(symtab_section, 0, 0,
1271                 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
1272                 SHN_ABS, file->filename);
1273
1274     /* define some often used types */
1275     int_type.t = VT_INT;
1276
1277     char_pointer_type.t = VT_BYTE;
1278     mk_pointer(&char_pointer_type);
1279
1280     func_old_type.t = VT_FUNC;
1281     func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
1282
1283 #if defined(TCC_ARM_EABI) && defined(TCC_ARM_VFP)
1284     float_type.t = VT_FLOAT;
1285     double_type.t = VT_DOUBLE;
1286
1287     func_float_type.t = VT_FUNC;
1288     func_float_type.ref = sym_push(SYM_FIELD, &float_type, FUNC_CDECL, FUNC_OLD);
1289     func_double_type.t = VT_FUNC;
1290     func_double_type.ref = sym_push(SYM_FIELD, &double_type, FUNC_CDECL, FUNC_OLD);
1291 #endif
1292
1293 #if 0
1294     /* define 'void *alloca(unsigned int)' builtin function */
1295     {
1296         Sym *s1;
1297
1298         p = anon_sym++;
1299         sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
1300         s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
1301         s1->next = NULL;
1302         sym->next = s1;
1303         sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
1304     }
1305 #endif
1306
1307     define_start = define_stack;
1308     nocode_wanted = 1;
1309
1310     if (setjmp(s1->error_jmp_buf) == 0) {
1311         s1->nb_errors = 0;
1312         s1->error_set_jmp_enabled = 1;
1313
1314         ch = file->buf_ptr[0];
1315         tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
1316         parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
1317         next();
1318         decl(VT_CONST);
1319         if (tok != TOK_EOF)
1320             expect("declaration");
1321
1322         /* end of translation unit info */
1323         if (s1->do_debug) {
1324             put_stabs_r(NULL, N_SO, 0, 0,
1325                         text_section->data_offset, text_section, section_sym);
1326         }
1327     }
1328     s1->error_set_jmp_enabled = 0;
1329
1330     /* reset define stack, but leave -Dsymbols (may be incorrect if
1331        they are undefined) */
1332     free_defines(define_start);
1333
1334     gen_inline_functions();
1335
1336     sym_pop(&global_stack, NULL);
1337     sym_pop(&local_stack, NULL);
1338
1339     return s1->nb_errors != 0 ? -1 : 0;
1340 }
1341
1342 int tcc_compile_string(TCCState *s, const char *str)
1343 {
1344     BufferedFile bf1, *bf = &bf1;
1345     int ret, len;
1346     char *buf;
1347
1348     /* init file structure */
1349     bf->fd = -1;
1350     /* XXX: avoid copying */
1351     len = strlen(str);
1352     buf = tcc_malloc(len + 1);
1353     if (!buf)
1354         return -1;
1355     memcpy(buf, str, len);
1356     buf[len] = CH_EOB;
1357     bf->buf_ptr = buf;
1358     bf->buf_end = buf + len;
1359     pstrcpy(bf->filename, sizeof(bf->filename), "<string>");
1360     bf->line_num = 1;
1361     file = bf;
1362     ret = tcc_compile(s);
1363     file = NULL;
1364     tcc_free(buf);
1365
1366     /* currently, no need to close */
1367     return ret;
1368 }
1369
1370 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
1371 void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
1372 {
1373     BufferedFile bf1, *bf = &bf1;
1374
1375     pstrcpy(bf->buffer, IO_BUF_SIZE, sym);
1376     pstrcat(bf->buffer, IO_BUF_SIZE, " ");
1377     /* default value */
1378     if (!value)
1379         value = "1";
1380     pstrcat(bf->buffer, IO_BUF_SIZE, value);
1381
1382     /* init file structure */
1383     bf->fd = -1;
1384     bf->buf_ptr = bf->buffer;
1385     bf->buf_end = bf->buffer + strlen(bf->buffer);
1386     *bf->buf_end = CH_EOB;
1387     bf->filename[0] = '\0';
1388     bf->line_num = 1;
1389     file = bf;
1390
1391     s1->include_stack_ptr = s1->include_stack;
1392
1393     /* parse with define parser */
1394     ch = file->buf_ptr[0];
1395     next_nomacro();
1396     parse_define();
1397     file = NULL;
1398 }
1399
1400 /* undefine a preprocessor symbol */
1401 void tcc_undefine_symbol(TCCState *s1, const char *sym)
1402 {
1403     TokenSym *ts;
1404     Sym *s;
1405     ts = tok_alloc(sym, strlen(sym));
1406     s = define_find(ts->tok);
1407     /* undefine symbol by putting an invalid name */
1408     if (s)
1409         define_undef(s);
1410 }
1411
1412
1413 #ifdef CONFIG_TCC_BACKTRACE
1414 /* print the position in the source file of PC value 'pc' by reading
1415    the stabs debug information */
1416 static unsigned long rt_printline(unsigned long wanted_pc)
1417 {
1418     Stab_Sym *sym, *sym_end;
1419     char func_name[128], last_func_name[128];
1420     unsigned long func_addr, last_pc, pc;
1421     const char *incl_files[INCLUDE_STACK_SIZE];
1422     int incl_index, len, last_line_num, i;
1423     const char *str, *p;
1424
1425     fprintf(stderr, "0x%08lx:", wanted_pc);
1426
1427     func_name[0] = '\0';
1428     func_addr = 0;
1429     incl_index = 0;
1430     last_func_name[0] = '\0';
1431     last_pc = 0xffffffff;
1432     last_line_num = 1;
1433     sym = (Stab_Sym *)stab_section->data + 1;
1434     sym_end = (Stab_Sym *)(stab_section->data + stab_section->data_offset);
1435     while (sym < sym_end) {
1436         switch(sym->n_type) {
1437             /* function start or end */
1438         case N_FUN:
1439             if (sym->n_strx == 0) {
1440                 /* we test if between last line and end of function */
1441                 pc = sym->n_value + func_addr;
1442                 if (wanted_pc >= last_pc && wanted_pc < pc)
1443                     goto found;
1444                 func_name[0] = '\0';
1445                 func_addr = 0;
1446             } else {
1447                 str = stabstr_section->data + sym->n_strx;
1448                 p = strchr(str, ':');
1449                 if (!p) {
1450                     pstrcpy(func_name, sizeof(func_name), str);
1451                 } else {
1452                     len = p - str;
1453                     if (len > sizeof(func_name) - 1)
1454                         len = sizeof(func_name) - 1;
1455                     memcpy(func_name, str, len);
1456                     func_name[len] = '\0';
1457                 }
1458                 func_addr = sym->n_value;
1459             }
1460             break;
1461             /* line number info */
1462         case N_SLINE:
1463             pc = sym->n_value + func_addr;
1464             if (wanted_pc >= last_pc && wanted_pc < pc)
1465                 goto found;
1466             last_pc = pc;
1467             last_line_num = sym->n_desc;
1468             /* XXX: slow! */
1469             strcpy(last_func_name, func_name);
1470             break;
1471             /* include files */
1472         case N_BINCL:
1473             str = stabstr_section->data + sym->n_strx;
1474         add_incl:
1475             if (incl_index < INCLUDE_STACK_SIZE) {
1476                 incl_files[incl_index++] = str;
1477             }
1478             break;
1479         case N_EINCL:
1480             if (incl_index > 1)
1481                 incl_index--;
1482             break;
1483         case N_SO:
1484             if (sym->n_strx == 0) {
1485                 incl_index = 0; /* end of translation unit */
1486             } else {
1487                 str = stabstr_section->data + sym->n_strx;
1488                 /* do not add path */
1489                 len = strlen(str);
1490                 if (len > 0 && str[len - 1] != '/')
1491                     goto add_incl;
1492             }
1493             break;
1494         }
1495         sym++;
1496     }
1497
1498     /* second pass: we try symtab symbols (no line number info) */
1499     incl_index = 0;
1500     {
1501         ElfW(Sym) *sym, *sym_end;
1502         int type;
1503
1504         sym_end = (ElfW(Sym) *)(symtab_section->data + symtab_section->data_offset);
1505         for(sym = (ElfW(Sym) *)symtab_section->data + 1;
1506             sym < sym_end;
1507             sym++) {
1508             type = ELFW(ST_TYPE)(sym->st_info);
1509             if (type == STT_FUNC) {
1510                 if (wanted_pc >= sym->st_value &&
1511                     wanted_pc < sym->st_value + sym->st_size) {
1512                     pstrcpy(last_func_name, sizeof(last_func_name),
1513                             strtab_section->data + sym->st_name);
1514                     func_addr = sym->st_value;
1515                     goto found;
1516                 }
1517             }
1518         }
1519     }
1520     /* did not find any info: */
1521     fprintf(stderr, " ???\n");
1522     return 0;
1523  found:
1524     if (last_func_name[0] != '\0') {
1525         fprintf(stderr, " %s()", last_func_name);
1526     }
1527     if (incl_index > 0) {
1528         fprintf(stderr, " (%s:%d",
1529                 incl_files[incl_index - 1], last_line_num);
1530         for(i = incl_index - 2; i >= 0; i--)
1531             fprintf(stderr, ", included from %s", incl_files[i]);
1532         fprintf(stderr, ")");
1533     }
1534     fprintf(stderr, "\n");
1535     return func_addr;
1536 }
1537
1538 #ifdef __i386__
1539 /* fix for glibc 2.1 */
1540 #ifndef REG_EIP
1541 #define REG_EIP EIP
1542 #define REG_EBP EBP
1543 #endif
1544
1545 /* return the PC at frame level 'level'. Return non zero if not found */
1546 static int rt_get_caller_pc(unsigned long *paddr,
1547                             ucontext_t *uc, int level)
1548 {
1549     unsigned long fp;
1550     int i;
1551
1552     if (level == 0) {
1553 #if defined(__FreeBSD__)
1554         *paddr = uc->uc_mcontext.mc_eip;
1555 #elif defined(__dietlibc__)
1556         *paddr = uc->uc_mcontext.eip;
1557 #else
1558         *paddr = uc->uc_mcontext.gregs[REG_EIP];
1559 #endif
1560         return 0;
1561     } else {
1562 #if defined(__FreeBSD__)
1563         fp = uc->uc_mcontext.mc_ebp;
1564 #elif defined(__dietlibc__)
1565         fp = uc->uc_mcontext.ebp;
1566 #else
1567         fp = uc->uc_mcontext.gregs[REG_EBP];
1568 #endif
1569         for(i=1;i<level;i++) {
1570             /* XXX: check address validity with program info */
1571             if (fp <= 0x1000 || fp >= 0xc0000000)
1572                 return -1;
1573             fp = ((unsigned long *)fp)[0];
1574         }
1575         *paddr = ((unsigned long *)fp)[1];
1576         return 0;
1577     }
1578 }
1579 #elif defined(__x86_64__)
1580 /* return the PC at frame level 'level'. Return non zero if not found */
1581 static int rt_get_caller_pc(unsigned long *paddr,
1582                             ucontext_t *uc, int level)
1583 {
1584     unsigned long fp;
1585     int i;
1586
1587     if (level == 0) {
1588         /* XXX: only support linux */
1589 #if defined(__FreeBSD__)
1590         *paddr = uc->uc_mcontext.mc_rip;
1591 #else
1592         *paddr = uc->uc_mcontext.gregs[REG_RIP];
1593 #endif
1594         return 0;
1595     } else {
1596 #if defined(__FreeBSD__)
1597         fp = uc->uc_mcontext.mc_rbp;
1598 #else
1599         fp = uc->uc_mcontext.gregs[REG_RBP];
1600 #endif
1601         for(i=1;i<level;i++) {
1602             /* XXX: check address validity with program info */
1603             if (fp <= 0x1000)
1604                 return -1;
1605             fp = ((unsigned long *)fp)[0];
1606         }
1607         *paddr = ((unsigned long *)fp)[1];
1608         return 0;
1609     }
1610 }
1611 #else
1612 #warning add arch specific rt_get_caller_pc()
1613 static int rt_get_caller_pc(unsigned long *paddr,
1614                             ucontext_t *uc, int level)
1615 {
1616     return -1;
1617 }
1618 #endif
1619
1620 /* emit a run time error at position 'pc' */
1621 void rt_error(ucontext_t *uc, const char *fmt, ...)
1622 {
1623     va_list ap;
1624     unsigned long pc;
1625     int i;
1626
1627     va_start(ap, fmt);
1628     fprintf(stderr, "Runtime error: ");
1629     vfprintf(stderr, fmt, ap);
1630     fprintf(stderr, "\n");
1631     for(i=0;i<num_callers;i++) {
1632         if (rt_get_caller_pc(&pc, uc, i) < 0)
1633             break;
1634         if (i == 0)
1635             fprintf(stderr, "at ");
1636         else
1637             fprintf(stderr, "by ");
1638         pc = rt_printline(pc);
1639         if (pc == rt_prog_main && pc)
1640             break;
1641     }
1642     exit(255);
1643     va_end(ap);
1644 }
1645
1646 /* signal handler for fatal errors */
1647 static void sig_error(int signum, siginfo_t *siginf, void *puc)
1648 {
1649     ucontext_t *uc = puc;
1650
1651     switch(signum) {
1652     case SIGFPE:
1653         switch(siginf->si_code) {
1654         case FPE_INTDIV:
1655         case FPE_FLTDIV:
1656             rt_error(uc, "division by zero");
1657             break;
1658         default:
1659             rt_error(uc, "floating point exception");
1660             break;
1661         }
1662         break;
1663     case SIGBUS:
1664     case SIGSEGV:
1665         if (rt_bound_error_msg && *rt_bound_error_msg)
1666             rt_error(uc, *rt_bound_error_msg);
1667         else
1668             rt_error(uc, "dereferencing invalid pointer");
1669         break;
1670     case SIGILL:
1671         rt_error(uc, "illegal instruction");
1672         break;
1673     case SIGABRT:
1674         rt_error(uc, "abort() called");
1675         break;
1676     default:
1677         rt_error(uc, "caught signal %d", signum);
1678         break;
1679     }
1680     exit(255);
1681 }
1682
1683 #endif
1684
1685 /* copy code into memory passed in by the caller and do all relocations
1686    (needed before using tcc_get_symbol()).
1687    returns -1 on error and required size if ptr is NULL */
1688 int tcc_relocate(TCCState *s1, void *ptr)
1689 {
1690     Section *s;
1691     unsigned long offset, length;
1692     uplong mem;
1693     int i;
1694
1695     if (0 == s1->runtime_added) {
1696         s1->runtime_added = 1;
1697         s1->nb_errors = 0;
1698 #ifdef TCC_TARGET_PE
1699         pe_output_file(s1, NULL);
1700 #else
1701         tcc_add_runtime(s1);
1702         relocate_common_syms();
1703         tcc_add_linker_symbols(s1);
1704         build_got_entries(s1);
1705 #endif
1706         if (s1->nb_errors)
1707             return -1;
1708     }
1709
1710     offset = 0, mem = (uplong)ptr;
1711     for(i = 1; i < s1->nb_sections; i++) {
1712         s = s1->sections[i];
1713         if (0 == (s->sh_flags & SHF_ALLOC))
1714             continue;
1715         length = s->data_offset;
1716         s->sh_addr = mem ? (mem + offset + 15) & ~15 : 0;
1717         offset = (offset + length + 15) & ~15;
1718     }
1719
1720     /* relocate symbols */
1721     relocate_syms(s1, 1);
1722     if (s1->nb_errors)
1723         return -1;
1724
1725 #ifndef TCC_TARGET_PE
1726 #ifdef TCC_TARGET_X86_64
1727     s1->runtime_plt_and_got_offset = 0;
1728     s1->runtime_plt_and_got = (char *)(mem + offset);
1729     /* double the size of the buffer for got and plt entries
1730        XXX: calculate exact size for them? */
1731     offset *= 2;
1732 #endif
1733 #endif
1734
1735     if (0 == mem)
1736         return offset + 15;
1737
1738     /* relocate each section */
1739     for(i = 1; i < s1->nb_sections; i++) {
1740         s = s1->sections[i];
1741         if (s->reloc)
1742             relocate_section(s1, s);
1743     }
1744
1745     for(i = 1; i < s1->nb_sections; i++) {
1746         s = s1->sections[i];
1747         if (0 == (s->sh_flags & SHF_ALLOC))
1748             continue;
1749         length = s->data_offset;
1750         // printf("%-12s %08x %04x\n", s->name, s->sh_addr, length);
1751         ptr = (void*)(uplong)s->sh_addr;
1752         if (NULL == s->data || s->sh_type == SHT_NOBITS)
1753             memset(ptr, 0, length);
1754         else
1755             memcpy(ptr, s->data, length);
1756         /* mark executable sections as executable in memory */
1757         if (s->sh_flags & SHF_EXECINSTR)
1758             set_pages_executable(ptr, length);
1759     }
1760 #ifndef TCC_TARGET_PE
1761 #ifdef TCC_TARGET_X86_64
1762     set_pages_executable(s1->runtime_plt_and_got,
1763                          s1->runtime_plt_and_got_offset);
1764 #endif
1765 #endif
1766     return 0;
1767 }
1768
1769 /* launch the compiled program with the given arguments */
1770 int tcc_run(TCCState *s1, int argc, char **argv)
1771 {
1772     int (*prog_main)(int, char **);
1773     void *ptr;
1774     int ret;
1775
1776     ret = tcc_relocate(s1, NULL);
1777     if (ret < 0)
1778         return -1;
1779     ptr = tcc_malloc(ret);
1780     tcc_relocate(s1, ptr);
1781
1782     prog_main = tcc_get_symbol_err(s1, "main");
1783
1784     if (s1->do_debug) {
1785 #ifdef CONFIG_TCC_BACKTRACE
1786         struct sigaction sigact;
1787         /* install TCC signal handlers to print debug info on fatal
1788            runtime errors */
1789         sigact.sa_flags = SA_SIGINFO | SA_RESETHAND;
1790         sigact.sa_sigaction = sig_error;
1791         sigemptyset(&sigact.sa_mask);
1792         sigaction(SIGFPE, &sigact, NULL);
1793         sigaction(SIGILL, &sigact, NULL);
1794         sigaction(SIGSEGV, &sigact, NULL);
1795         sigaction(SIGBUS, &sigact, NULL);
1796         sigaction(SIGABRT, &sigact, NULL);
1797 #else
1798         error("debug mode not available");
1799 #endif
1800     }
1801
1802 #ifdef CONFIG_TCC_BCHECK
1803     if (s1->do_bounds_check) {
1804         void (*bound_init)(void);
1805         void (*bound_exit)(void);
1806         /* set error function */
1807         rt_bound_error_msg = tcc_get_symbol_err(s1, "__bound_error_msg");
1808         rt_prog_main = (unsigned long)prog_main;
1809         /* XXX: use .init section so that it also work in binary ? */
1810         bound_init = tcc_get_symbol_err(s1, "__bound_init");
1811         bound_exit = tcc_get_symbol_err(s1, "__bound_exit");
1812         bound_init();
1813         ret = (*prog_main)(argc, argv);
1814         bound_exit();
1815     } else
1816 #endif
1817     ret = (*prog_main)(argc, argv);
1818     tcc_free(ptr);
1819     return ret;
1820 }
1821
1822 void tcc_memstats(void)
1823 {
1824 #ifdef MEM_DEBUG
1825     printf("memory in use: %d\n", mem_cur_size);
1826 #endif
1827 }
1828
1829 static void tcc_cleanup(void)
1830 {
1831     int i, n;
1832
1833     if (NULL == tcc_state)
1834         return;
1835     tcc_state = NULL;
1836
1837     /* free -D defines */
1838     free_defines(NULL);
1839
1840     /* free tokens */
1841     n = tok_ident - TOK_IDENT;
1842     for(i = 0; i < n; i++)
1843         tcc_free(table_ident[i]);
1844     tcc_free(table_ident);
1845
1846     /* free sym_pools */
1847     dynarray_reset(&sym_pools, &nb_sym_pools);
1848     /* string buffer */
1849     cstr_free(&tokcstr);
1850     /* reset symbol stack */
1851     sym_free_first = NULL;
1852     /* cleanup from error/setjmp */
1853     macro_ptr = NULL;
1854 }
1855
1856 TCCState *tcc_new(void)
1857 {
1858     TCCState *s;
1859     char buffer[100];
1860     int a,b,c;
1861
1862     tcc_cleanup();
1863
1864     s = tcc_mallocz(sizeof(TCCState));
1865     if (!s)
1866         return NULL;
1867     tcc_state = s;
1868 #ifdef _WIN32
1869     tcc_set_lib_path_w32(s);
1870 #else
1871     tcc_set_lib_path(s, CONFIG_TCCDIR);
1872 #endif
1873     s->output_type = TCC_OUTPUT_MEMORY;
1874     preprocess_new();
1875
1876     /* we add dummy defines for some special macros to speed up tests
1877        and to have working defined() */
1878     define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
1879     define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
1880     define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
1881     define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
1882
1883     /* standard defines */
1884     tcc_define_symbol(s, "__STDC__", NULL);
1885     tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
1886 #if defined(TCC_TARGET_I386)
1887     tcc_define_symbol(s, "__i386__", "1");
1888     tcc_define_symbol(s, "__i386", "1");
1889     tcc_define_symbol(s, "i386", "1");
1890 #endif
1891 #if defined(TCC_TARGET_X86_64)
1892     tcc_define_symbol(s, "__x86_64__", NULL);
1893 #endif
1894 #if defined(TCC_TARGET_ARM)
1895     tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
1896     tcc_define_symbol(s, "__arm_elf__", NULL);
1897     tcc_define_symbol(s, "__arm_elf", NULL);
1898     tcc_define_symbol(s, "arm_elf", NULL);
1899     tcc_define_symbol(s, "__arm__", NULL);
1900     tcc_define_symbol(s, "__arm", NULL);
1901     tcc_define_symbol(s, "arm", NULL);
1902     tcc_define_symbol(s, "__APCS_32__", NULL);
1903 #endif
1904 #ifdef TCC_TARGET_PE
1905     tcc_define_symbol(s, "_WIN32", NULL);
1906 #ifdef TCC_TARGET_X86_64
1907     tcc_define_symbol(s, "_WIN64", NULL);
1908 #endif
1909 #else
1910     tcc_define_symbol(s, "__unix__", "1");
1911     tcc_define_symbol(s, "__unix", "1");
1912     tcc_define_symbol(s, "unix", "1");
1913 #if defined(__FreeBSD__)
1914 #define str(s) #s
1915     tcc_define_symbol(s, "__FreeBSD__", str( __FreeBSD__));
1916     tcc_define_symbol(s, "__INTEL_COMPILER", "1");
1917 #undef str
1918 #endif
1919 #if defined(__linux)
1920     tcc_define_symbol(s, "__linux__", NULL);
1921     tcc_define_symbol(s, "__linux", NULL);
1922 #endif
1923 #endif
1924     /* tiny C specific defines */
1925     sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
1926     sprintf(buffer, "%d", a*10000 + b*100 + c);
1927     tcc_define_symbol(s, "__TINYC__", buffer);
1928
1929     /* tiny C & gcc defines */
1930     tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
1931     tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
1932 #ifdef TCC_TARGET_PE
1933     tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
1934 #else
1935     tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
1936 #endif
1937
1938 #ifndef TCC_TARGET_PE
1939     /* default library paths */
1940     tcc_add_library_path(s, CONFIG_SYSROOT "/usr/local/lib");
1941     tcc_add_library_path(s, CONFIG_SYSROOT "/usr/lib");
1942     tcc_add_library_path(s, CONFIG_SYSROOT "/lib");
1943 #endif
1944
1945     /* no section zero */
1946     dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
1947
1948     /* create standard sections */
1949     text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
1950     data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
1951     bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
1952
1953     /* symbols are always generated for linking stage */
1954     symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
1955                                 ".strtab",
1956                                 ".hashtab", SHF_PRIVATE);
1957     strtab_section = symtab_section->link;
1958
1959     /* private symbol table for dynamic symbols */
1960     s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
1961                                       ".dynstrtab",
1962                                       ".dynhashtab", SHF_PRIVATE);
1963     s->alacarte_link = 1;
1964
1965 #ifdef CHAR_IS_UNSIGNED
1966     s->char_is_unsigned = 1;
1967 #endif
1968 #if defined(TCC_TARGET_PE) && 0
1969     /* XXX: currently the PE linker is not ready to support that */
1970     s->leading_underscore = 1;
1971 #endif
1972
1973     if (s->section_align == 0)
1974         s->section_align = ELF_PAGE_SIZE;
1975
1976 #ifdef TCC_TARGET_I386
1977     s->seg_size = 32;
1978 #endif
1979     return s;
1980 }
1981
1982 void tcc_delete(TCCState *s1)
1983 {
1984     int i;
1985
1986     tcc_cleanup();
1987
1988     /* free all sections */
1989     for(i = 1; i < s1->nb_sections; i++)
1990         free_section(s1->sections[i]);
1991     dynarray_reset(&s1->sections, &s1->nb_sections);
1992
1993     for(i = 0; i < s1->nb_priv_sections; i++)
1994         free_section(s1->priv_sections[i]);
1995     dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1996
1997     /* free any loaded DLLs */
1998     for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1999         DLLReference *ref = s1->loaded_dlls[i];
2000         if ( ref->handle )
2001             dlclose(ref->handle);
2002     }
2003
2004     /* free loaded dlls array */
2005     dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
2006
2007     /* free library paths */
2008     dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
2009
2010     /* free include paths */
2011     dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
2012     dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
2013     dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
2014
2015     tcc_free(s1->tcc_lib_path);
2016     tcc_free(s1);
2017 }
2018
2019 int tcc_add_include_path(TCCState *s1, const char *pathname)
2020 {
2021     char *pathname1;
2022
2023     pathname1 = tcc_strdup(pathname);
2024     dynarray_add((void ***)&s1->include_paths, &s1->nb_include_paths, pathname1);
2025     return 0;
2026 }
2027
2028 int tcc_add_sysinclude_path(TCCState *s1, const char *pathname)
2029 {
2030     char *pathname1;
2031
2032     pathname1 = tcc_strdup(pathname);
2033     dynarray_add((void ***)&s1->sysinclude_paths, &s1->nb_sysinclude_paths, pathname1);
2034     return 0;
2035 }
2036
2037 static int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
2038 {
2039     const char *ext;
2040     ElfW(Ehdr) ehdr;
2041     int fd, ret, size;
2042     BufferedFile *saved_file;
2043
2044     ret = -1;
2045
2046     /* find source file type with extension */
2047     ext = tcc_fileextension(filename);
2048     if (ext[0])
2049         ext++;
2050
2051     /* open the file */
2052     saved_file = file;
2053     file = tcc_open(s1, filename);
2054     if (!file) {
2055         if (flags & AFF_PRINT_ERROR)
2056             error_noabort("file '%s' not found", filename);
2057         goto the_end;
2058     }
2059
2060     if (flags & AFF_PREPROCESS) {
2061         ret = tcc_preprocess(s1);
2062         goto the_end;
2063     }
2064
2065     if (!ext[0] || !PATHCMP(ext, "c")) {
2066         /* C file assumed */
2067         ret = tcc_compile(s1);
2068         goto the_end;
2069     }
2070
2071 #ifdef CONFIG_TCC_ASM
2072     if (!strcmp(ext, "S")) {
2073         /* preprocessed assembler */
2074         ret = tcc_assemble(s1, 1);
2075         goto the_end;
2076     }
2077
2078     if (!strcmp(ext, "s")) {
2079         /* non preprocessed assembler */
2080         ret = tcc_assemble(s1, 0);
2081         goto the_end;
2082     }
2083 #endif
2084
2085     fd = file->fd;
2086     /* assume executable format: auto guess file type */
2087     size = read(fd, &ehdr, sizeof(ehdr));
2088     lseek(fd, 0, SEEK_SET);
2089     if (size <= 0) {
2090         error_noabort("could not read header");
2091         goto the_end;
2092     }
2093
2094     if (size == sizeof(ehdr) &&
2095         ehdr.e_ident[0] == ELFMAG0 &&
2096         ehdr.e_ident[1] == ELFMAG1 &&
2097         ehdr.e_ident[2] == ELFMAG2 &&
2098         ehdr.e_ident[3] == ELFMAG3) {
2099
2100         /* do not display line number if error */
2101         file->line_num = 0;
2102         if (ehdr.e_type == ET_REL) {
2103             ret = tcc_load_object_file(s1, fd, 0);
2104             goto the_end;
2105
2106         }
2107 #ifndef TCC_TARGET_PE
2108         if (ehdr.e_type == ET_DYN) {
2109             if (s1->output_type == TCC_OUTPUT_MEMORY) {
2110                 void *h;
2111                 h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
2112                 if (h)
2113                     ret = 0;
2114             } else {
2115                 ret = tcc_load_dll(s1, fd, filename,
2116                                    (flags & AFF_REFERENCED_DLL) != 0);
2117             }
2118             goto the_end;
2119         }
2120 #endif
2121         error_noabort("unrecognized ELF file");
2122         goto the_end;
2123     }
2124
2125     if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
2126         file->line_num = 0; /* do not display line number if error */
2127         ret = tcc_load_archive(s1, fd);
2128         goto the_end;
2129     }
2130
2131 #ifdef TCC_TARGET_COFF
2132     if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
2133         ret = tcc_load_coff(s1, fd);
2134         goto the_end;
2135     }
2136 #endif
2137
2138 #ifdef TCC_TARGET_PE
2139     ret = pe_load_file(s1, filename, fd);
2140 #else
2141     /* as GNU ld, consider it is an ld script if not recognized */
2142     ret = tcc_load_ldscript(s1);
2143 #endif
2144     if (ret < 0)
2145         error_noabort("unrecognized file type");
2146
2147 the_end:
2148     if (file)
2149         tcc_close(file);
2150     file = saved_file;
2151     return ret;
2152 }
2153
2154 int tcc_add_file(TCCState *s, const char *filename)
2155 {
2156     if (s->output_type == TCC_OUTPUT_PREPROCESS)
2157         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS);
2158     else
2159         return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR);
2160 }
2161
2162 int tcc_add_library_path(TCCState *s, const char *pathname)
2163 {
2164     char *pathname1;
2165
2166     pathname1 = tcc_strdup(pathname);
2167     dynarray_add((void ***)&s->library_paths, &s->nb_library_paths, pathname1);
2168     return 0;
2169 }
2170
2171 /* find and load a dll. Return non zero if not found */
2172 /* XXX: add '-rpath' option support ? */
2173 static int tcc_add_dll(TCCState *s, const char *filename, int flags)
2174 {
2175     char buf[1024];
2176     int i;
2177
2178     for(i = 0; i < s->nb_library_paths; i++) {
2179         snprintf(buf, sizeof(buf), "%s/%s",
2180                  s->library_paths[i], filename);
2181         if (tcc_add_file_internal(s, buf, flags) == 0)
2182             return 0;
2183     }
2184     return -1;
2185 }
2186
2187 /* the library name is the same as the argument of the '-l' option */
2188 int tcc_add_library(TCCState *s, const char *libraryname)
2189 {
2190     char buf[1024];
2191     int i;
2192
2193     /* first we look for the dynamic library if not static linking */
2194     if (!s->static_link) {
2195 #ifdef TCC_TARGET_PE
2196         if (pe_add_dll(s, libraryname) == 0)
2197             return 0;
2198 #else
2199         snprintf(buf, sizeof(buf), "lib%s.so", libraryname);
2200         if (tcc_add_dll(s, buf, 0) == 0)
2201             return 0;
2202 #endif
2203     }
2204     /* then we look for the static library */
2205     for(i = 0; i < s->nb_library_paths; i++) {
2206         snprintf(buf, sizeof(buf), "%s/lib%s.a",
2207                  s->library_paths[i], libraryname);
2208         if (tcc_add_file_internal(s, buf, 0) == 0)
2209             return 0;
2210     }
2211     return -1;
2212 }
2213
2214 int tcc_add_symbol(TCCState *s, const char *name, void *val)
2215 {
2216     add_elf_sym(symtab_section, (uplong)val, 0,
2217                 ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
2218                 SHN_ABS, name);
2219     return 0;
2220 }
2221
2222 int tcc_set_output_type(TCCState *s, int output_type)
2223 {
2224     char buf[1024];
2225
2226     s->output_type = output_type;
2227
2228     if (!s->nostdinc) {
2229         /* default include paths */
2230         /* XXX: reverse order needed if -isystem support */
2231 #ifndef TCC_TARGET_PE
2232         tcc_add_sysinclude_path(s, CONFIG_SYSROOT "/usr/local/include");
2233         tcc_add_sysinclude_path(s, CONFIG_SYSROOT "/usr/include");
2234 #endif
2235         snprintf(buf, sizeof(buf), "%s/include", s->tcc_lib_path);
2236         tcc_add_sysinclude_path(s, buf);
2237 #ifdef TCC_TARGET_PE
2238         snprintf(buf, sizeof(buf), "%s/include/winapi", s->tcc_lib_path);
2239         tcc_add_sysinclude_path(s, buf);
2240 #endif
2241     }
2242
2243     /* if bound checking, then add corresponding sections */
2244 #ifdef CONFIG_TCC_BCHECK
2245     if (s->do_bounds_check) {
2246         /* define symbol */
2247         tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
2248         /* create bounds sections */
2249         bounds_section = new_section(s, ".bounds",
2250                                      SHT_PROGBITS, SHF_ALLOC);
2251         lbounds_section = new_section(s, ".lbounds",
2252                                       SHT_PROGBITS, SHF_ALLOC);
2253     }
2254 #endif
2255
2256     if (s->char_is_unsigned) {
2257         tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
2258     }
2259
2260     /* add debug sections */
2261     if (s->do_debug) {
2262         /* stab symbols */
2263         stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
2264         stab_section->sh_entsize = sizeof(Stab_Sym);
2265         stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
2266         put_elf_str(stabstr_section, "");
2267         stab_section->link = stabstr_section;
2268         /* put first entry */
2269         put_stabs("", 0, 0, 0, 0);
2270     }
2271
2272     /* add libc crt1/crti objects */
2273 #ifndef TCC_TARGET_PE
2274     if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
2275         !s->nostdlib) {
2276         if (output_type != TCC_OUTPUT_DLL)
2277             tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crt1.o");
2278         tcc_add_file(s, CONFIG_TCC_CRT_PREFIX "/crti.o");
2279     }
2280 #endif
2281
2282 #ifdef TCC_TARGET_PE
2283     snprintf(buf, sizeof(buf), "%s/lib", s->tcc_lib_path);
2284     tcc_add_library_path(s, buf);
2285 #ifdef _WIN32
2286     if (GetSystemDirectory(buf, sizeof buf))
2287         tcc_add_library_path(s, buf);
2288 #endif
2289 #endif
2290
2291     return 0;
2292 }
2293
2294 #define WD_ALL    0x0001 /* warning is activated when using -Wall */
2295 #define FD_INVERT 0x0002 /* invert value before storing */
2296
2297 typedef struct FlagDef {
2298     uint16_t offset;
2299     uint16_t flags;
2300     const char *name;
2301 } FlagDef;
2302
2303 static const FlagDef warning_defs[] = {
2304     { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
2305     { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
2306     { offsetof(TCCState, warn_error), 0, "error" },
2307     { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
2308       "implicit-function-declaration" },
2309 };
2310
2311 static int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
2312                     const char *name, int value)
2313 {
2314     int i;
2315     const FlagDef *p;
2316     const char *r;
2317
2318     r = name;
2319     if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
2320         r += 3;
2321         value = !value;
2322     }
2323     for(i = 0, p = flags; i < nb_flags; i++, p++) {
2324         if (!strcmp(r, p->name))
2325             goto found;
2326     }
2327     return -1;
2328  found:
2329     if (p->flags & FD_INVERT)
2330         value = !value;
2331     *(int *)((uint8_t *)s + p->offset) = value;
2332     return 0;
2333 }
2334
2335
2336 /* set/reset a warning */
2337 int tcc_set_warning(TCCState *s, const char *warning_name, int value)
2338 {
2339     int i;
2340     const FlagDef *p;
2341
2342     if (!strcmp(warning_name, "all")) {
2343         for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
2344             if (p->flags & WD_ALL)
2345                 *(int *)((uint8_t *)s + p->offset) = 1;
2346         }
2347         return 0;
2348     } else {
2349         return set_flag(s, warning_defs, countof(warning_defs),
2350                         warning_name, value);
2351     }
2352 }
2353
2354 static const FlagDef flag_defs[] = {
2355     { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
2356     { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
2357     { offsetof(TCCState, nocommon), FD_INVERT, "common" },
2358     { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
2359 };
2360
2361 /* set/reset a flag */
2362 int tcc_set_flag(TCCState *s, const char *flag_name, int value)
2363 {
2364     return set_flag(s, flag_defs, countof(flag_defs),
2365                     flag_name, value);
2366 }
2367
2368 /* set CONFIG_TCCDIR at runtime */
2369 void tcc_set_lib_path(TCCState *s, const char *path)
2370 {
2371     tcc_free(s->tcc_lib_path);
2372     s->tcc_lib_path = tcc_strdup(path);
2373 }
2374
2375 void tcc_print_stats(TCCState *s, int64_t total_time)
2376 {
2377     double tt;
2378     tt = (double)total_time / 1000000.0;
2379     if (tt < 0.001)
2380         tt = 0.001;
2381     if (total_bytes < 1)
2382         total_bytes = 1;
2383     printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
2384            tok_ident - TOK_IDENT, total_lines, total_bytes,
2385            tt, (int)(total_lines / tt),
2386            total_bytes / tt / 1000000.0);
2387 }