tcc.h

   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 #define _GNU_SOURCE
  22 #include "config.h"
  23
  24 #ifdef CONFIG_TCCBOOT
  25
  26 #include "tccboot.h"
  27 #define CONFIG_TCC_STATIC
  28
  29 #else
  30
  31 #include <stdlib.h>
  32 #include <stdio.h>
  33 #include <stdarg.h>
  34 #include <string.h>
  35 #include <errno.h>
  36 #include <math.h>
  37 #include <signal.h>
  38 #include <fcntl.h>
  39 #include <setjmp.h>
  40 #include <time.h>
  41
  42 #ifdef _WIN32
  43 #include <windows.h>
  44 #include <sys/timeb.h>
  45 #ifdef _MSC_VER
  46 #define inline __inline
  47 #endif
  48 #endif
  49
  50 #ifndef _WIN32
  51 #include <unistd.h>
  52 #include <sys/time.h>
  53 #include <sys/ucontext.h>
  54 #include <sys/mman.h>
  55 #endif
  56
  57 #endif /* !CONFIG_TCCBOOT */
  58
  59 #ifndef PAGESIZE
  60 #define PAGESIZE 4096
  61 #endif
  62
  63 #include "elf.h"
  64 #include "stab.h"
  65
  66 #ifndef O_BINARY
  67 #define O_BINARY 0
  68 #endif
  69
  70 #include "libtcc.h"
  71
  72 /* parser debug */
  73 //#define PARSE_DEBUG
  74 /* preprocessor debug */
  75 //#define PP_DEBUG
  76 /* include file debug */
  77 //#define INC_DEBUG
  78
  79 //#define MEM_DEBUG
  80
  81 /* assembler debug */
  82 //#define ASM_DEBUG
  83
  84 /* target selection */
  85 //#define TCC_TARGET_I386   /* i386 code generator */
  86 //#define TCC_TARGET_ARM    /* ARMv4 code generator */
  87 //#define TCC_TARGET_C67    /* TMS320C67xx code generator */
  88 //#define TCC_TARGET_X86_64 /* x86-64 code generator */
  89
  90 /* default target is I386 */
  91 #if !defined(TCC_TARGET_I386) && !defined(TCC_TARGET_ARM) && \
  92     !defined(TCC_TARGET_C67) && !defined(TCC_TARGET_X86_64)
  93 #define TCC_TARGET_I386
  94 #endif
  95
  96 #if !defined(_WIN32) && !defined(TCC_UCLIBC) && !defined(TCC_TARGET_ARM) && \
  97     !defined(TCC_TARGET_C67) && !defined(TCC_TARGET_X86_64)
  98 #define CONFIG_TCC_BCHECK /* enable bound checking code */
  99 #endif
 100
 101 #if defined(_WIN32) && !defined(TCC_TARGET_PE)
 102 #define CONFIG_TCC_STATIC
 103 #endif
 104
 105 /* define it to include assembler support */
 106 #if !defined(TCC_TARGET_ARM) && !defined(TCC_TARGET_C67) && \
 107     !defined(TCC_TARGET_X86_64)
 108 #define CONFIG_TCC_ASM
 109 #endif
 110
 111 /* object format selection */
 112 #if defined(TCC_TARGET_C67)
 113 #define TCC_TARGET_COFF
 114 #endif
 115
 116 #if !defined(_WIN32) && !defined(CONFIG_TCCBOOT)
 117 #define CONFIG_TCC_BACKTRACE
 118 #endif
 119
 120 #define FALSE 0
 121 #define false 0
 122 #define TRUE 1
 123 #define true 1
 124 typedef int BOOL;
 125
 126 /* path to find crt1.o, crti.o and crtn.o. Only needed when generating
 127    executables or dlls */
 128 #define CONFIG_TCC_CRT_PREFIX CONFIG_SYSROOT "/usr/lib"
 129
 130 #define INCLUDE_STACK_SIZE  32
 131 #define IFDEF_STACK_SIZE    64
 132 #define VSTACK_SIZE         256
 133 #define STRING_MAX_SIZE     1024
 134 #define PACK_STACK_SIZE     8
 135
 136 #define TOK_HASH_SIZE       8192 /* must be a power of two */
 137 #define TOK_ALLOC_INCR      512  /* must be a power of two */
 138 #define TOK_MAX_SIZE        4 /* token max size in int unit when stored in string */
 139
 140 /* token symbol management */
 141 typedef struct TokenSym {
 142     struct TokenSym *hash_next;
 143     struct Sym *sym_define; /* direct pointer to define */
 144     struct Sym *sym_label; /* direct pointer to label */
 145     struct Sym *sym_struct; /* direct pointer to structure */
 146     struct Sym *sym_identifier; /* direct pointer to identifier */
 147     int tok; /* token number */
 148     int len;
 149     char str[1];
 150 } TokenSym;
 151
 152 #ifdef TCC_TARGET_PE
 153 typedef unsigned short nwchar_t;
 154 #else
 155 typedef int nwchar_t;
 156 #endif
 157
 158 typedef struct CString {
 159     int size; /* size in bytes */
 160     void *data; /* either 'char *' or 'nwchar_t *' */
 161     int size_allocated;
 162     void *data_allocated; /* if non NULL, data has been malloced */
 163 } CString;
 164
 165 /* type definition */
 166 typedef struct CType {
 167     int t;
 168     struct Sym *ref;
 169 } CType;
 170
 171 /* constant value */
 172 typedef union CValue {
 173     long double ld;
 174     double d;
 175     float f;
 176     int i;
 177     unsigned int ui;
 178     unsigned int ul; /* address (should be unsigned long on 64 bit cpu) */
 179     long long ll;
 180     unsigned long long ull;
 181     struct CString *cstr;
 182     void *ptr;
 183     int tab[1];
 184 } CValue;
 185
 186 /* value on stack */
 187 typedef struct SValue {
 188     CType type;      /* type */
 189     unsigned short r;      /* register + flags */
 190     unsigned short r2;     /* second register, used for 'long long'
 191                               type. If not used, set to VT_CONST */
 192     CValue c;              /* constant, if VT_CONST */
 193     struct Sym *sym;       /* symbol, if (VT_SYM | VT_CONST) */
 194 } SValue;
 195
 196 /* symbol management */
 197 typedef struct Sym {
 198     int v;    /* symbol token */
 199     long r;    /* associated register */
 200     long c;    /* associated number */
 201     CType type;    /* associated type */
 202     struct Sym *next; /* next related symbol */
 203     struct Sym *prev; /* prev symbol in stack */
 204     struct Sym *prev_tok; /* previous symbol for this token */
 205 } Sym;
 206
 207 /* section definition */
 208 /* XXX: use directly ELF structure for parameters ? */
 209 /* special flag to indicate that the section should not be linked to
 210    the other ones */
 211 #define SHF_PRIVATE 0x80000000
 212
 213 /* special flag, too */
 214 #define SECTION_ABS ((void *)1)
 215
 216 typedef struct Section {
 217     unsigned long data_offset; /* current data offset */
 218     unsigned char *data;       /* section data */
 219     unsigned long data_allocated; /* used for realloc() handling */
 220     int sh_name;             /* elf section name (only used during output) */
 221     int sh_num;              /* elf section number */
 222     int sh_type;             /* elf section type */
 223     int sh_flags;            /* elf section flags */
 224     int sh_info;             /* elf section info */
 225     int sh_addralign;        /* elf section alignment */
 226     int sh_entsize;          /* elf entry size */
 227     unsigned long sh_size;   /* section size (only used during output) */
 228     unsigned long sh_addr;      /* address at which the section is relocated */
 229     unsigned long sh_offset;    /* file offset */
 230     int nb_hashed_syms;      /* used to resize the hash table */
 231     struct Section *link;    /* link to another section */
 232     struct Section *reloc;   /* corresponding section for relocation, if any */
 233     struct Section *hash;     /* hash table for symbols */
 234     struct Section *next;
 235     char name[1];           /* section name */
 236 } Section;
 237
 238 typedef struct DLLReference {
 239     int level;
 240     void *handle;
 241     char name[1];
 242 } DLLReference;
 243
 244 /* GNUC attribute definition */
 245 typedef struct AttributeDef {
 246     int aligned;
 247     int packed;
 248     Section *section;
 249     int func_attr; /* calling convention, exports, ... */
 250 } AttributeDef;
 251
 252 /* -------------------------------------------------- */
 253 /* gr: wrappers for casting sym->r for other purposes */
 254 typedef struct {
 255     unsigned
 256       func_call : 8,
 257       func_args : 8,
 258       func_export : 1;
 259 } func_attr_t;
 260
 261 #define FUNC_CALL(r) (((func_attr_t*)&(r))->func_call)
 262 #define FUNC_EXPORT(r) (((func_attr_t*)&(r))->func_export)
 263 #define FUNC_ARGS(r) (((func_attr_t*)&(r))->func_args)
 264 #define INLINE_DEF(r) (*(int **)&(r))
 265 /* -------------------------------------------------- */
 266
 267 #define SYM_STRUCT     0x40000000 /* struct/union/enum symbol space */
 268 #define SYM_FIELD      0x20000000 /* struct/union field symbol space */
 269 #define SYM_FIRST_ANOM 0x10000000 /* first anonymous sym */
 270
 271 /* stored in 'Sym.c' field */
 272 #define FUNC_NEW       1 /* ansi function prototype */
 273 #define FUNC_OLD       2 /* old function prototype */
 274 #define FUNC_ELLIPSIS  3 /* ansi function prototype with ... */
 275
 276 /* stored in 'Sym.r' field */
 277 #define FUNC_CDECL     0 /* standard c call */
 278 #define FUNC_STDCALL   1 /* pascal c call */
 279 #define FUNC_FASTCALL1 2 /* first param in %eax */
 280 #define FUNC_FASTCALL2 3 /* first parameters in %eax, %edx */
 281 #define FUNC_FASTCALL3 4 /* first parameter in %eax, %edx, %ecx */
 282 #define FUNC_FASTCALLW 5 /* first parameter in %ecx, %edx */
 283
 284 /* field 'Sym.t' for macros */
 285 #define MACRO_OBJ      0 /* object like macro */
 286 #define MACRO_FUNC     1 /* function like macro */
 287
 288 /* field 'Sym.r' for C labels */
 289 #define LABEL_DEFINED  0 /* label is defined */
 290 #define LABEL_FORWARD  1 /* label is forward defined */
 291 #define LABEL_DECLARED 2 /* label is declared but never used */
 292
 293 /* type_decl() types */
 294 #define TYPE_ABSTRACT  1 /* type without variable */
 295 #define TYPE_DIRECT    2 /* type with variable */
 296
 297 #define IO_BUF_SIZE 8192
 298
 299 typedef struct BufferedFile {
 300     uint8_t *buf_ptr;
 301     uint8_t *buf_end;
 302     int fd;
 303     int line_num;    /* current line number - here to simplify code */
 304     int ifndef_macro;  /* #ifndef macro / #endif search */
 305     int ifndef_macro_saved; /* saved ifndef_macro */
 306     int *ifdef_stack_ptr; /* ifdef_stack value at the start of the file */
 307     char inc_type;          /* type of include */
 308     char inc_filename[512]; /* filename specified by the user */
 309     char filename[1024];    /* current filename - here to simplify code */
 310     unsigned char buffer[IO_BUF_SIZE + 1]; /* extra size for CH_EOB char */
 311 } BufferedFile;
 312
 313 #define CH_EOB   '\\'       /* end of buffer or '\0' char in file */
 314 #define CH_EOF   (-1)   /* end of file */
 315
 316 /* parsing state (used to save parser state to reparse part of the
 317    source several times) */
 318 typedef struct ParseState {
 319     int *macro_ptr;
 320     int line_num;
 321     int tok;
 322     CValue tokc;
 323 } ParseState;
 324
 325 /* used to record tokens */
 326 typedef struct TokenString {
 327     int *str;
 328     int len;
 329     int allocated_len;
 330     int last_line_num;
 331 } TokenString;
 332
 333 /* include file cache, used to find files faster and also to eliminate
 334    inclusion if the include file is protected by #ifndef ... #endif */
 335 typedef struct CachedInclude {
 336     int ifndef_macro;
 337     int hash_next; /* -1 if none */
 338     char type; /* '"' or '>' to give include type */
 339     char filename[1]; /* path specified in #include */
 340 } CachedInclude;
 341
 342 #define CACHED_INCLUDES_HASH_SIZE 512
 343
 344 struct TCCState {
 345     int output_type;
 346
 347     BufferedFile **include_stack_ptr;
 348     int *ifdef_stack_ptr;
 349
 350     /* include file handling */
 351     char **include_paths;
 352     int nb_include_paths;
 353     char **sysinclude_paths;
 354     int nb_sysinclude_paths;
 355     CachedInclude **cached_includes;
 356     int nb_cached_includes;
 357
 358     char **library_paths;
 359     int nb_library_paths;
 360
 361     /* array of all loaded dlls (including those referenced by loaded
 362        dlls) */
 363     DLLReference **loaded_dlls;
 364     int nb_loaded_dlls;
 365
 366     /* sections */
 367     Section **sections;
 368     int nb_sections; /* number of sections, including first dummy section */
 369
 370     Section **priv_sections;
 371     int nb_priv_sections; /* number of private sections */
 372
 373     /* got handling */
 374     Section *got;
 375     Section *plt;
 376     unsigned long *got_offsets;
 377     int nb_got_offsets;
 378     /* give the correspondance from symtab indexes to dynsym indexes */
 379     int *symtab_to_dynsym;
 380
 381     /* temporary dynamic symbol sections (for dll loading) */
 382     Section *dynsymtab_section;
 383     /* exported dynamic symbol section */
 384     Section *dynsym;
 385
 386     int nostdinc; /* if true, no standard headers are added */
 387     int nostdlib; /* if true, no standard libraries are added */
 388     int nocommon; /* if true, do not use common symbols for .bss data */
 389
 390     /* if true, static linking is performed */
 391     int static_link;
 392
 393     /* soname as specified on the command line (-soname) */
 394     const char *soname;
 395
 396     /* if true, all symbols are exported */
 397     int rdynamic;
 398
 399     /* if true, only link in referenced objects from archive */
 400     int alacarte_link;
 401
 402     /* address of text section */
 403     unsigned long text_addr;
 404     int has_text_addr;
 405
 406     /* output format, see TCC_OUTPUT_FORMAT_xxx */
 407     int output_format;
 408
 409     /* C language options */
 410     int char_is_unsigned;
 411     int leading_underscore;
 412
 413     /* warning switches */
 414     int warn_write_strings;
 415     int warn_unsupported;
 416     int warn_error;
 417     int warn_none;
 418     int warn_implicit_function_declaration;
 419
 420     /* display some information during compilation */
 421     int verbose;
 422     /* compile with debug symbol (and use them if error during execution) */
 423     int do_debug;
 424     /* compile with built-in memory and bounds checker */
 425     int do_bounds_check;
 426     /* give the path of the tcc libraries */
 427     const char *tcc_lib_path;
 428
 429     /* error handling */
 430     void *error_opaque;
 431     void (*error_func)(void *opaque, const char *msg);
 432     int error_set_jmp_enabled;
 433     jmp_buf error_jmp_buf;
 434     int nb_errors;
 435
 436     /* tiny assembler state */
 437     Sym *asm_labels;
 438
 439     /* see include_stack_ptr */
 440     BufferedFile *include_stack[INCLUDE_STACK_SIZE];
 441
 442     /* see ifdef_stack_ptr */
 443     int ifdef_stack[IFDEF_STACK_SIZE];
 444
 445     /* see cached_includes */
 446     int cached_includes_hash[CACHED_INCLUDES_HASH_SIZE];
 447
 448     /* pack stack */
 449     int pack_stack[PACK_STACK_SIZE];
 450     int *pack_stack_ptr;
 451
 452     /* output file for preprocessing */
 453     FILE *outfile;
 454
 455     /* for tcc_relocate */
 456     int runtime_added;
 457
 458 #ifdef TCC_TARGET_X86_64
 459     /* write PLT and GOT here */
 460     char *runtime_plt_and_got;
 461     unsigned int runtime_plt_and_got_offset;
 462 #endif
 463 };
 464
 465 /* The current value can be: */
 466 #define VT_VALMASK   0x00ff
 467 #define VT_CONST     0x00f0  /* constant in vc
 468                               (must be first non register value) */
 469 #define VT_LLOCAL    0x00f1  /* lvalue, offset on stack */
 470 #define VT_LOCAL     0x00f2  /* offset on stack */
 471 #define VT_CMP       0x00f3  /* the value is stored in processor flags (in vc) */
 472 #define VT_JMP       0x00f4  /* value is the consequence of jmp true (even) */
 473 #define VT_JMPI      0x00f5  /* value is the consequence of jmp false (odd) */
 474 #define VT_LVAL      0x0100  /* var is an lvalue */
 475 #define VT_SYM       0x0200  /* a symbol value is added */
 476 #define VT_MUSTCAST  0x0400  /* value must be casted to be correct (used for
 477                                 char/short stored in integer registers) */
 478 #define VT_MUSTBOUND 0x0800  /* bound checking must be done before
 479                                 dereferencing value */
 480 #define VT_BOUNDED   0x8000  /* value is bounded. The address of the
 481                                 bounding function call point is in vc */
 482 #define VT_LVAL_BYTE     0x1000  /* lvalue is a byte */
 483 #define VT_LVAL_SHORT    0x2000  /* lvalue is a short */
 484 #define VT_LVAL_UNSIGNED 0x4000  /* lvalue is unsigned */
 485 #define VT_LVAL_TYPE     (VT_LVAL_BYTE | VT_LVAL_SHORT | VT_LVAL_UNSIGNED)
 486
 487 /* types */
 488 #define VT_INT        0  /* integer type */
 489 #define VT_BYTE       1  /* signed byte type */
 490 #define VT_SHORT      2  /* short type */
 491 #define VT_VOID       3  /* void type */
 492 #define VT_PTR        4  /* pointer */
 493 #define VT_ENUM       5  /* enum definition */
 494 #define VT_FUNC       6  /* function type */
 495 #define VT_STRUCT     7  /* struct/union definition */
 496 #define VT_FLOAT      8  /* IEEE float */
 497 #define VT_DOUBLE     9  /* IEEE double */
 498 #define VT_LDOUBLE   10  /* IEEE long double */
 499 #define VT_BOOL      11  /* ISOC99 boolean type */
 500 #define VT_LLONG     12  /* 64 bit integer */
 501 #define VT_LONG      13  /* long integer (NEVER USED as type, only
 502                             during parsing) */
 503 #define VT_BTYPE      0x000f /* mask for basic type */
 504 #define VT_UNSIGNED   0x0010  /* unsigned type */
 505 #define VT_ARRAY      0x0020  /* array type (also has VT_PTR) */
 506 #define VT_BITFIELD   0x0040  /* bitfield modifier */
 507 #define VT_CONSTANT   0x0800  /* const modifier */
 508 #define VT_VOLATILE   0x1000  /* volatile modifier */
 509 #define VT_SIGNED     0x2000  /* signed type */
 510
 511 /* storage */
 512 #define VT_EXTERN  0x00000080  /* extern definition */
 513 #define VT_STATIC  0x00000100  /* static variable */
 514 #define VT_TYPEDEF 0x00000200  /* typedef definition */
 515 #define VT_INLINE  0x00000400  /* inline definition */
 516
 517 #define VT_STRUCT_SHIFT 16   /* shift for bitfield shift values */
 518
 519 /* type mask (except storage) */
 520 #define VT_STORAGE (VT_EXTERN | VT_STATIC | VT_TYPEDEF | VT_INLINE)
 521 #define VT_TYPE    (~(VT_STORAGE))
 522
 523 /* token values */
 524
 525 /* warning: the following compare tokens depend on i386 asm code */
 526 #define TOK_ULT 0x92
 527 #define TOK_UGE 0x93
 528 #define TOK_EQ  0x94
 529 #define TOK_NE  0x95
 530 #define TOK_ULE 0x96
 531 #define TOK_UGT 0x97
 532 #define TOK_Nset 0x98
 533 #define TOK_Nclear 0x99
 534 #define TOK_LT  0x9c
 535 #define TOK_GE  0x9d
 536 #define TOK_LE  0x9e
 537 #define TOK_GT  0x9f
 538
 539 #define TOK_LAND  0xa0
 540 #define TOK_LOR   0xa1
 541
 542 #define TOK_DEC   0xa2
 543 #define TOK_MID   0xa3 /* inc/dec, to void constant */
 544 #define TOK_INC   0xa4
 545 #define TOK_UDIV  0xb0 /* unsigned division */
 546 #define TOK_UMOD  0xb1 /* unsigned modulo */
 547 #define TOK_PDIV  0xb2 /* fast division with undefined rounding for pointers */
 548 #define TOK_CINT   0xb3 /* number in tokc */
 549 #define TOK_CCHAR 0xb4 /* char constant in tokc */
 550 #define TOK_STR   0xb5 /* pointer to string in tokc */
 551 #define TOK_TWOSHARPS 0xb6 /* ## preprocessing token */
 552 #define TOK_LCHAR    0xb7
 553 #define TOK_LSTR     0xb8
 554 #define TOK_CFLOAT   0xb9 /* float constant */
 555 #define TOK_LINENUM  0xba /* line number info */
 556 #define TOK_CDOUBLE  0xc0 /* double constant */
 557 #define TOK_CLDOUBLE 0xc1 /* long double constant */
 558 #define TOK_UMULL    0xc2 /* unsigned 32x32 -> 64 mul */
 559 #define TOK_ADDC1    0xc3 /* add with carry generation */
 560 #define TOK_ADDC2    0xc4 /* add with carry use */
 561 #define TOK_SUBC1    0xc5 /* add with carry generation */
 562 #define TOK_SUBC2    0xc6 /* add with carry use */
 563 #define TOK_CUINT    0xc8 /* unsigned int constant */
 564 #define TOK_CLLONG   0xc9 /* long long constant */
 565 #define TOK_CULLONG  0xca /* unsigned long long constant */
 566 #define TOK_ARROW    0xcb
 567 #define TOK_DOTS     0xcc /* three dots */
 568 #define TOK_SHR      0xcd /* unsigned shift right */
 569 #define TOK_PPNUM    0xce /* preprocessor number */
 570
 571 #define TOK_SHL   0x01 /* shift left */
 572 #define TOK_SAR   0x02 /* signed shift right */
 573
 574 /* assignement operators : normal operator or 0x80 */
 575 #define TOK_A_MOD 0xa5
 576 #define TOK_A_AND 0xa6
 577 #define TOK_A_MUL 0xaa
 578 #define TOK_A_ADD 0xab
 579 #define TOK_A_SUB 0xad
 580 #define TOK_A_DIV 0xaf
 581 #define TOK_A_XOR 0xde
 582 #define TOK_A_OR  0xfc
 583 #define TOK_A_SHL 0x81
 584 #define TOK_A_SAR 0x82
 585
 586 #ifndef offsetof
 587 #define offsetof(type, field) ((size_t) &((type *)0)->field)
 588 #endif
 589
 590 #ifndef countof
 591 #define countof(tab) (sizeof(tab) / sizeof((tab)[0]))
 592 #endif
 593
 594 #define TOK_EOF       (-1)  /* end of file */
 595 #define TOK_LINEFEED  10    /* line feed */
 596
 597 /* all identificators and strings have token above that */
 598 #define TOK_IDENT 256
 599
 600 /* only used for i386 asm opcodes definitions */
 601 #define DEF_ASM(x) DEF(TOK_ASM_ ## x, #x)
 602
 603 #define DEF_BWL(x) \
 604  DEF(TOK_ASM_ ## x ## b, #x "b") \
 605  DEF(TOK_ASM_ ## x ## w, #x "w") \
 606  DEF(TOK_ASM_ ## x ## l, #x "l") \
 607  DEF(TOK_ASM_ ## x, #x)
 608
 609 #define DEF_WL(x) \
 610  DEF(TOK_ASM_ ## x ## w, #x "w") \
 611  DEF(TOK_ASM_ ## x ## l, #x "l") \
 612  DEF(TOK_ASM_ ## x, #x)
 613
 614 #define DEF_FP1(x) \
 615  DEF(TOK_ASM_ ## f ## x ## s, "f" #x "s") \
 616  DEF(TOK_ASM_ ## fi ## x ## l, "fi" #x "l") \
 617  DEF(TOK_ASM_ ## f ## x ## l, "f" #x "l") \
 618  DEF(TOK_ASM_ ## fi ## x ## s, "fi" #x "s")
 619
 620 #define DEF_FP(x) \
 621  DEF(TOK_ASM_ ## f ## x, "f" #x ) \
 622  DEF(TOK_ASM_ ## f ## x ## p, "f" #x "p") \
 623  DEF_FP1(x)
 624
 625 #define DEF_ASMTEST(x) \
 626  DEF_ASM(x ## o) \
 627  DEF_ASM(x ## no) \
 628  DEF_ASM(x ## b) \
 629  DEF_ASM(x ## c) \
 630  DEF_ASM(x ## nae) \
 631  DEF_ASM(x ## nb) \
 632  DEF_ASM(x ## nc) \
 633  DEF_ASM(x ## ae) \
 634  DEF_ASM(x ## e) \
 635  DEF_ASM(x ## z) \
 636  DEF_ASM(x ## ne) \
 637  DEF_ASM(x ## nz) \
 638  DEF_ASM(x ## be) \
 639  DEF_ASM(x ## na) \
 640  DEF_ASM(x ## nbe) \
 641  DEF_ASM(x ## a) \
 642  DEF_ASM(x ## s) \
 643  DEF_ASM(x ## ns) \
 644  DEF_ASM(x ## p) \
 645  DEF_ASM(x ## pe) \
 646  DEF_ASM(x ## np) \
 647  DEF_ASM(x ## po) \
 648  DEF_ASM(x ## l) \
 649  DEF_ASM(x ## nge) \
 650  DEF_ASM(x ## nl) \
 651  DEF_ASM(x ## ge) \
 652  DEF_ASM(x ## le) \
 653  DEF_ASM(x ## ng) \
 654  DEF_ASM(x ## nle) \
 655  DEF_ASM(x ## g)
 656
 657 #define TOK_ASM_int TOK_INT
 658
 659 enum tcc_token {
 660     TOK_LAST = TOK_IDENT - 1,
 661 #define DEF(id, str) id,
 662 #include "tcctok.h"
 663 #undef DEF
 664 };
 665
 666 #define TOK_UIDENT TOK_DEFINE
 667
 668 #ifdef _WIN32
 669 #define snprintf _snprintf
 670 #define vsnprintf _vsnprintf
 671 #ifndef __GNUC__
 672   #define strtold (long double)strtod
 673   #define strtof (float)strtod
 674   #define strtoll (long long)strtol
 675 #endif
 676 #elif defined(TCC_UCLIBC) || defined(__FreeBSD__) || defined(__DragonFly__) \
 677     || defined(__OpenBSD__)
 678 /* currently incorrect */
 679 long double strtold(const char *nptr, char **endptr)
 680 {
 681     return (long double)strtod(nptr, endptr);
 682 }
 683 float strtof(const char *nptr, char **endptr)
 684 {
 685     return (float)strtod(nptr, endptr);
 686 }
 687 #else
 688 /* XXX: need to define this to use them in non ISOC99 context */
 689 extern float strtof (const char *__nptr, char **__endptr);
 690 extern long double strtold (const char *__nptr, char **__endptr);
 691 #endif
 692
 693 #ifdef _WIN32
 694 #define IS_PATHSEP(c) (c == '/' || c == '\\')
 695 #define IS_ABSPATH(p) (IS_PATHSEP(p[0]) || (p[0] && p[1] == ':' && IS_PATHSEP(p[2])))
 696 #define PATHCMP stricmp
 697 #else
 698 #define IS_PATHSEP(c) (c == '/')
 699 #define IS_ABSPATH(p) IS_PATHSEP(p[0])
 700 #define PATHCMP strcmp
 701 #endif
 702
 703 static char *pstrcpy(char *buf, int buf_size, const char *s);
 704 static char *pstrcat(char *buf, int buf_size, const char *s);
 705 static char *tcc_basename(const char *name);
 706 static char *tcc_fileextension (const char *p);
 707
 708 static void next(void);
 709 static void next_nomacro(void);
 710 static void next_nomacro_spc(void);
 711 static void parse_expr_type(CType *type);
 712 static void expr_type(CType *type);
 713 static void unary_type(CType *type);
 714 static void block(int *bsym, int *csym, int *case_sym, int *def_sym,
 715                   int case_reg, int is_expr);
 716 static int expr_const(void);
 717 static void expr_eq(void);
 718 static void gexpr(void);
 719 static void gen_inline_functions(void);
 720 static void decl(int l);
 721 static void decl_initializer(CType *type, Section *sec, unsigned long c,
 722                              int first, int size_only);
 723 static void decl_initializer_alloc(CType *type, AttributeDef *ad, int r,
 724                                    int has_init, int v, int scope);
 725 int gv(int rc);
 726 void gv2(int rc1, int rc2);
 727 void move_reg(int r, int s);
 728 void save_regs(int n);
 729 void save_reg(int r);
 730 void vpop(void);
 731 void vswap(void);
 732 void vdup(void);
 733 int get_reg(int rc);
 734 int get_reg_ex(int rc,int rc2);
 735
 736 struct macro_level {
 737     struct macro_level *prev;
 738     int *p;
 739 };
 740
 741 static void macro_subst(TokenString *tok_str, Sym **nested_list,
 742                         const int *macro_str, struct macro_level **can_read_stream);
 743 void gen_op(int op);
 744 void force_charshort_cast(int t);
 745 static void gen_cast(CType *type);
 746 void vstore(void);
 747 static Sym *sym_find(int v);
 748 static Sym *sym_push(int v, CType *type, int r, int c);
 749
 750 /* type handling */
 751 static int type_size(CType *type, int *a);
 752 static inline CType *pointed_type(CType *type);
 753 static int pointed_size(CType *type);
 754 static int lvalue_type(int t);
 755 static int parse_btype(CType *type, AttributeDef *ad);
 756 static void type_decl(CType *type, AttributeDef *ad, int *v, int td);
 757 static int compare_types(CType *type1, CType *type2, int unqualified);
 758 static int is_compatible_types(CType *type1, CType *type2);
 759 static int is_compatible_parameter_types(CType *type1, CType *type2);
 760
 761 int ieee_finite(double d);
 762 void error(const char *fmt, ...);
 763 void vpushi(int v);
 764 void vpushll(long long v);
 765 void vrott(int n);
 766 void vnrott(int n);
 767 void lexpand_nr(void);
 768 static void vpush_global_sym(CType *type, int v);
 769 void vset(CType *type, int r, int v);
 770 void type_to_str(char *buf, int buf_size,
 771                  CType *type, const char *varstr);
 772 char *get_tok_str(int v, CValue *cv);
 773 static Sym *get_sym_ref(CType *type, Section *sec,
 774                         unsigned long offset, unsigned long size);
 775 static Sym *external_global_sym(int v, CType *type, int r);
 776
 777 /* section generation */
 778 static void section_realloc(Section *sec, unsigned long new_size);
 779 static void *section_ptr_add(Section *sec, unsigned long size);
 780 static void put_extern_sym(Sym *sym, Section *section,
 781                            unsigned long value, unsigned long size);
 782 static void greloc(Section *s, Sym *sym, unsigned long addr, int type);
 783 static int put_elf_str(Section *s, const char *sym);
 784 static int put_elf_sym(Section *s,
 785                        unsigned long value, unsigned long size,
 786                        int info, int other, int shndx, const char *name);
 787 static int add_elf_sym(Section *s, unsigned long value, unsigned long size,
 788                        int info, int other, int sh_num, const char *name);
 789 static void put_elf_reloc(Section *symtab, Section *s, unsigned long offset,
 790                           int type, int symbol);
 791 static void put_stabs(const char *str, int type, int other, int desc,
 792                       unsigned long value);
 793 static void put_stabs_r(const char *str, int type, int other, int desc,
 794                         unsigned long value, Section *sec, int sym_index);
 795 static void put_stabn(int type, int other, int desc, int value);
 796 static void put_stabd(int type, int other, int desc);
 797 static int tcc_add_dll(TCCState *s, const char *filename, int flags);
 798
 799 #define AFF_PRINT_ERROR     0x0001 /* print error if file not found */
 800 #define AFF_REFERENCED_DLL  0x0002 /* load a referenced dll from another dll */
 801 #define AFF_PREPROCESS      0x0004 /* preprocess file */
 802 static int tcc_add_file_internal(TCCState *s, const char *filename, int flags);
 803
 804 /* tcccoff.c */
 805 int tcc_output_coff(TCCState *s1, FILE *f);
 806
 807 /* tccpe.c */
 808 void *resolve_sym(TCCState *s1, const char *sym, int type);
 809 int pe_load_def_file(struct TCCState *s1, int fd);
 810 int pe_test_res_file(void *v, int size);
 811 int pe_load_res_file(struct TCCState *s1, int fd);
 812 void pe_add_runtime(struct TCCState *s1);
 813 void pe_guess_outfile(char *objfilename, int output_type);
 814 int pe_output_file(struct TCCState *s1, const char *filename);
 815
 816 /* tccasm.c */
 817
 818 #ifdef CONFIG_TCC_ASM
 819
 820 typedef struct ExprValue {
 821     uint32_t v;
 822     Sym *sym;
 823 } ExprValue;
 824
 825 #define MAX_ASM_OPERANDS 30
 826
 827 typedef struct ASMOperand {
 828     int id; /* GCC 3 optionnal identifier (0 if number only supported */
 829     char *constraint;
 830     char asm_str[16]; /* computed asm string for operand */
 831     SValue *vt; /* C value of the expression */
 832     int ref_index; /* if >= 0, gives reference to a output constraint */
 833     int input_index; /* if >= 0, gives reference to an input constraint */
 834     int priority; /* priority, used to assign registers */
 835     int reg; /* if >= 0, register number used for this operand */
 836     int is_llong; /* true if double register value */
 837     int is_memory; /* true if memory operand */
 838     int is_rw;     /* for '+' modifier */
 839 } ASMOperand;
 840
 841 static void asm_expr(TCCState *s1, ExprValue *pe);
 842 static int asm_int_expr(TCCState *s1);
 843 static int find_constraint(ASMOperand *operands, int nb_operands,
 844                            const char *name, const char **pp);
 845
 846 static int tcc_assemble(TCCState *s1, int do_preprocess);
 847
 848 #endif
 849
 850 static void asm_instr(void);
 851 static void asm_global_instr(void);
 852
 853 #ifdef CONFIG_TCC_BACKTRACE
 854 extern int num_callers;
 855 extern const char **rt_bound_error_msg;
 856 #endif
 857
 858 /* true if float/double/long double type */
 859 static inline int is_float(int t)
 860 {
 861     int bt;
 862     bt = t & VT_BTYPE;
 863     return bt == VT_LDOUBLE || bt == VT_DOUBLE || bt == VT_FLOAT;
 864 }
 865