gas/config/coff.gnu.h

   1 /* coff.gnu.h
   2    Copyright (C) 1987 Free Software Foundation, Inc.
   3
   4    This file is part of GAS, the GNU Assembler.
   5
   6    GAS is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2, or (at your option)
   9    any later version.
  10
  11    GAS 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
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with GAS; see the file COPYING.  If not, write to
  18    the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 /*** coff information for 80960.  Origins: Intel, AMD, etc., natch. */
  21
  22 /*
  23  * At this point I'm sure this file is right for i960 and I'm pretty sure it's
  24  * right for a29k, although it hasn't been tested rigorously.  Please feel free
  25  * to add your own machine's description here.  Without that info, it isn't
  26  * possible to build cross development tools from elsewhere nor is it easy to
  27  * continue to support your machines format.
  28  *
  29  * The TC_foo ifdef's are mine.  They are what gas uses.  The other ifdef's
  30  * remain for documentation from other scavenged files.   xoxorich.
  31  */
  32
  33 /* $Id$ */
  34
  35 /********************** FILE HEADER **********************/
  36
  37 struct filehdr {
  38         unsigned short  f_magic;        /* magic number                 */
  39         unsigned short  f_nscns;        /* number of sections           */
  40         long            f_timdat;       /* time & date stamp            */
  41         long            f_symptr;       /* file pointer to symtab       */
  42         long            f_nsyms;        /* number of symtab entries     */
  43         unsigned short  f_opthdr;       /* sizeof(optional hdr)         */
  44         unsigned short  f_flags;        /* flags                        */
  45 };
  46
  47 /* Bits for f_flags:
  48  *      F_RELFLG        relocation info stripped from file
  49  *      F_EXEC          file is executable (no unresolved externel references)
  50  *      F_LNNO          line nunbers stripped from file
  51  *      F_LSYMS         local symbols stripped from file
  52  *      F_AR32WR        file has byte ordering of an AR32WR machine (e.g. vax)
  53  */
  54 #define F_RELFLG        (0x0001)
  55 #define F_EXEC          (0x0002)
  56 #define F_LNNO          (0x0004)
  57 #define F_LSYMS         (0x0008)
  58
  59 #ifdef TC_I960
  60 #define F_AR32WR        (0x0010) /* File has 32 bits per word, least
  61                                     significant byte first. */
  62 #else /* TC_I960 */
  63 #define F_AR32WR        (0x0100)
  64 #endif /* TC_I960 */
  65
  66 #define F_MINMAL        (0x0010) /* ??? */
  67 #define F_UPDATE        (0x0020) /* ??? */
  68 #define F_SWABD         (0x0040) /* ??? */
  69 #define F_AR16WR        (0x0080) /* File has the byte ordering used by
  70                                     the PDP*-11/70 processor. */
  71 #define F_AR32W         (0x0200) /* File has 32 bits per word, most
  72                                     significant byte first. */
  73
  74 /*
  75  *      Intel 80960 (I960) processor flags.
  76  *      F_I960TYPE == mask for processor type field.
  77  */
  78
  79 #define F_I960TYPE      (0xf000)
  80 #define F_I960CORE      (0x1000)
  81 #define F_I960KB        (0x2000)
  82 #define F_I960SB        (0x2000)
  83 #define F_I960MC        (0x3000)
  84 #define F_I960XA        (0x4000)
  85 #define F_I960CA        (0x5000)
  86 #define F_I960KA        (0x6000)
  87 #define F_I960SA        (0x6000)
  88
  89 /*
  90  * i80960 Magic Numbers
  91  */
  92
  93 #define I960ROMAGIC     (0x160) /* read-only text segments */
  94 #define I960RWMAGIC     (0x161) /* read-write text segments */
  95
  96 #define I960BADMAG(x) (((x).f_magic != I960ROMAGIC) && ((x).f_magic != I960RWMAGIC))
  97
  98 #define SIPFBOMAGIC     (0x17a) /* Am29000 (Byte 0 is MSB - Big Endian) */
  99 #define SIPRBOMAGIC     (0x17b) /* Am29000 (Byte 0 is LSB - Little Endian) */
 100
 101 #define A29KBADMAG(x)   (((x).f_magic != SIPFBOMAGIC) && ((x).f_magic != SIPRBOMAGIC))
 102
 103 #define FILHDR  struct filehdr
 104 #define FILHSZ  sizeof(FILHDR)
 105
 106
 107 /********************** AOUT "OPTIONAL HEADER" **********************/
 108
 109 typedef struct {
 110         unsigned long   phys_addr;
 111         unsigned long   bitarray;
 112 } TAGBITS;
 113
 114 /*  These appear to be used only by exec(2).  I don't know who cares
 115     about them in a cross development environment.  In any case, this
 116     is my collection after researching the issue for a few hours.
 117     Apparently, most have these have remained essentially unchanged
 118     since v7 days, although a few new ones have been added.  xoxorich. */
 119
 120 #define BAD0MAGIC       (0401) /* (?) "lpd (UNIX/RT)" */
 121 #define BAD1MAGIC       (0405) /* (?) overlay */
 122 #define OMAGIC          (0407) /* old impure format. data immediately
 123                                   follows text. both sections are rw. */
 124 #define NMAGIC          (0410) /* split i&d, read-only text */
 125 #define A_MAGIC3        (0411) /* (?) "separated I&D" */
 126 #define ZMAGIC          (0413) /* like NMAGIC, but demand loaded */
 127 #define PAGEMAGIC2      (0414) /* (?) like ZMAGIC, but address zero
 128                                   explicitly unmapped. */
 129 #define REGMAGIC        (0414) /* (?) a PAGEMAGIC2 alias? */
 130 #define PAGEMAGIC3      (0415) /* (?) like ZMAGIC, but address zero mapped. */
 131 #define A_MAGIC5        (0437) /* (?) "system overlay, separated I&D" */
 132 /* intended for non-unix cross development */
 133 #define SASMAGIC        (010000) /* Single Address Space */
 134 #define MASMAGIC        (020000) /* (?) "Multiple (separate I & D) Address Spaces" */
 135
 136 typedef struct aouthdr {
 137         short           magic;  /* type of file                         */
 138         short           vstamp; /* version stamp                        */
 139         unsigned long   tsize;  /* text size in bytes, padded to FW bdry*/
 140         unsigned long   dsize;  /* initialized data "  "                */
 141         unsigned long   bsize;  /* uninitialized data "   "             */
 142 #if U3B
 143         unsigned long   dum1;
 144         unsigned long   dum2;   /* pad to entry point   */
 145 #endif
 146         unsigned long   entry;  /* entry pt.                            */
 147         unsigned long   text_start;     /* base of text used for this file */
 148         unsigned long   data_start;     /* base of data used for this file */
 149         /* CAREFUL: some formats omit the tagentries member. */
 150         unsigned long   tagentries;     /* number of tag entries to
 151                                            follow (always zero for i960) */
 152 } AOUTHDR;
 153
 154 /* return a pointer to the tag bits array */
 155
 156 #define TAGPTR(aout) ((TAGBITS *) (&(aout.tagentries)+1))
 157
 158 /* compute size of a header */
 159
 160 /*#define AOUTSZ(aout) (sizeof(AOUTHDR)+(aout.tagentries*sizeof(TAGBITS)))*/
 161 #define AOUTSZ (sizeof(AOUTHDR))
 162
 163
 164 /********************** STORAGE CLASSES **********************/
 165
 166 #define C_EFCN          -1      /* physical end of function */
 167 #define C_NULL          0
 168 #define C_AUTO          1       /* automatic variable */
 169 #define C_EXT           2       /* external symbol */
 170 #define C_STAT          3       /* static */
 171 #define C_REG           4       /* register variable */
 172 #define C_EXTDEF        5       /* external definition */
 173 #define C_LABEL         6       /* label */
 174 #define C_ULABEL        7       /* undefined label */
 175 #define C_MOS           8       /* member of structure */
 176 #define C_ARG           9       /* function argument */
 177 #define C_STRTAG        10      /* structure tag */
 178 #define C_MOU           11      /* member of union */
 179 #define C_UNTAG         12      /* union tag */
 180 #define C_TPDEF         13      /* type definition */
 181 #define C_USTATIC       14      /* undefined static */
 182 #define C_ENTAG         15      /* enumeration tag */
 183 #define C_MOE           16      /* member of enumeration */
 184 #define C_REGPARM       17      /* register parameter */
 185 #define C_FIELD         18      /* bit field */
 186
 187 #ifdef TC_I960
 188 #define C_AUTOARG       19      /* auto argument */
 189 #define C_LASTENT       20      /* dummy entry (end of block) */
 190 #endif /* TC_I960 */
 191
 192 #ifdef TC_A29K
 193 #define C_GLBLREG       19              /* global register */
 194 #define C_EXTREG        20              /* external global register */
 195 #define C_DEFREG        21              /* ext. def. of global register */
 196 #define C_STARTOF       22              /* as29 $SIZEOF and $STARTOF symbols */
 197 #endif /* TC_A29K */
 198
 199 #define C_BLOCK         100     /* ".bb" or ".eb" */
 200 #define C_FCN           101     /* ".bf" or ".ef" */
 201 #define C_EOS           102     /* end of structure */
 202 #define C_FILE          103     /* file name */
 203 #define C_LINE          104     /* line # reformatted as symbol table entry */
 204 #define C_ALIAS         105     /* duplicate tag */
 205 #define C_HIDDEN        106     /* ext symbol in dmert public lib. like static,
 206                                    used to avoid name conflicts. */
 207
 208 #ifdef TC_I960
 209 /* New storage classes for 80960 */
 210 #define C_SCALL         107     /* Procedure reachable via system call  */
 211 /* C_LEAFPROC is obsolete.  Use C_LEAFEXT or C_LEAFSTAT */
 212 #define C_LEAFPROC      108     /* Leaf procedure, "call" via BAL */
 213 #define C_LEAFEXT       108
 214 #define C_OPTVAR        109     /* Optimized variable */
 215 #define C_DEFINE        110     /* Preprocessor #define */
 216 #define C_PRAGMA        111     /* Advice to compiler or linker */
 217 #define C_SEGMENT       112     /* 80960 segment name */
 218 #define C_LEAFSTAT      113     /* Static leaf */
 219 #endif /* TC_I960 */
 220
 221 #ifdef TC_A29K
 222 #define C_SHADOW        107 /* shadow symbol */
 223 #endif /* TC_A29K */
 224
 225 /********************** SECTION HEADER **********************/
 226
 227 struct scnhdr {
 228         char            s_name[8];      /* section name */
 229         long            s_paddr;        /* physical address, aliased s_nlib */
 230         long            s_vaddr;        /* virtual address */
 231         long            s_size;         /* section size */
 232         long            s_scnptr;       /* file ptr to raw data for section */
 233         long            s_relptr;       /* file ptr to relocation */
 234         long            s_lnnoptr;      /* file ptr to line numbers */
 235         unsigned short  s_nreloc;       /* number of relocation entries */
 236         unsigned short  s_nlnno;        /* number of line number entries */
 237         long            s_flags;        /* flags */
 238
 239 #ifdef TC_I960
 240         unsigned long   s_align;        /* section alignment */
 241 #endif /* TC_I960 */
 242 };
 243
 244 #define SCNHDR  struct scnhdr
 245 #define SCNHSZ  sizeof(SCNHDR)
 246
 247 /*
 248  * names of "special" sections
 249  */
 250 #define _TEXT   ".text"
 251 #define _DATA   ".data"
 252 #define _BSS    ".bss"
 253
 254 /*
 255  * s_flags "type"
 256  */
 257
 258 /*
 259  * In instances where it is necessary for a linker to
 260  * produce an output file which contains text or data not
 261  * based at virtual address 0, e.g. for a ROM, then the
 262  * linker should accept address base information as command
 263  * input and use PAD sections to skip over unused addresses.
 264  * (at least for a29k.  Maybe others.)
 265  */
 266
 267 #define STYP_REG         (0x0000) /* "regular" section: allocated, relocated, loaded */
 268 #define STYP_DSECT       (0x0001) /* "dummy" section: not allocated, relocated, not loaded */
 269 #define STYP_NOLOAD      (0x0002) /* "noload" section: allocated, relocated, not loaded */
 270 #define STYP_GROUP       (0x0004) /* "grouped" section: formed of input sections */
 271 #define STYP_PAD         (0x0008) /* "padding" section: not allocated, not relocated, loaded */
 272 #define STYP_COPY        (0x0010) /* "copy" section: for decision function used by field update;  not allocated, not relocated,
 273                                      loaded; reloc & lineno entries processed normally */
 274 #define STYP_TEXT        (0x0020) /* section contains text only */
 275 #define S_SHRSEG         (0x0020) /* In 3b Update files (output of ogen), sections which appear in SHARED segments of the Pfile
 276                                      will have the S_SHRSEG flag set by ogen, to inform dufr that updating 1 copy of the proc. will
 277                                      update all process invocations. */
 278 #define STYP_DATA        (0x0040) /* section contains data only */
 279 #define STYP_BSS         (0x0080) /* section contains bss only */
 280 #define S_NEWFCN         (0x0100) /* In a minimal file or an update file, a new function (as compared with a replaced function) */
 281 #define STYP_INFO        (0x0200) /* comment section : not allocated not relocated, not loaded */
 282 #define STYP_OVER        (0x0400) /* overlay section : relocated not allocated or loaded */
 283 #define STYP_LIB         (0x0800) /* for .lib section : same as INFO */
 284 #define STYP_MERGE       (0x2000) /* merge section -- combines with text, data or bss sections only */
 285 #define STYP_REVERSE_PAD (0x4000) /* section will be padded with no-op instructions wherever padding is necessary and there is a
 286                                      word of contiguous bytes beginning on a word boundary. */
 287
 288 #ifdef TC_A29K
 289 /* NOTE:  The use of STYP_BSSREG for relocation is not yet defined. */
 290 #define STYP_BSSREG     0x1200  /* Global register area (like STYP_INFO) */
 291 #define STYP_ENVIR      0x2200  /* Environment (like STYP_INFO) */
 292 #define STYP_ABS        0x4000  /* Absolute (allocated, not reloc, loaded) */
 293 #define STYP_LIT        0x8020  /* Literal data (like STYP_TEXT) */
 294 #endif /* TC_A29K */
 295
 296 /********************** LINE NUMBERS **********************/
 297
 298 /* 1 line number entry for every "breakpointable" source line in a section.
 299  * Line numbers are grouped on a per function basis; first entry in a function
 300  * grouping will have l_lnno = 0 and in place of physical address will be the
 301  * symbol table index of the function name.
 302  */
 303 struct lineno {
 304         union {
 305                 long l_symndx;  /* symbol index of function name, iff l_lnno == 0*/
 306                 long l_paddr;   /* (physical) address of line number */
 307         } l_addr;
 308         unsigned short  l_lnno; /* line number */
 309 #ifdef TC_I960
 310         /* not used on a29k */
 311         char padding[2];        /* force alignment */
 312 #endif /* TC_I960 */
 313 };
 314
 315 #define LINENO  struct lineno
 316 #define LINESZ  sizeof(LINENO)
 317
 318
 319 /********************** SYMBOLS **********************/
 320
 321 #define SYMNMLEN        8       /* # characters in a symbol name */
 322 #define FILNMLEN        14      /* # characters in a file name */
 323 #define DIMNUM          4       /* # array dimensions in auxiliary entry */
 324
 325 struct syment {
 326         union {
 327                 char    _n_name[SYMNMLEN];      /* old COFF version */
 328                 struct {
 329                         long    _n_zeroes;      /* new == 0 */
 330                         long    _n_offset;      /* offset into string table */
 331                 } _n_n;
 332                 char    *_n_nptr[2];    /* allows for overlaying */
 333         } _n;
 334         long            n_value;        /* value of symbol */
 335         short           n_scnum;        /* section number */
 336
 337 #ifdef TC_I960
 338         /* This isn't yet used on the i960.  In some formats this
 339            is two bytes of padding.  In others, it is missing entirely. */
 340         unsigned short  n_flags;        /* copy of flags from filhdr */
 341 #endif /* TC_I960 */
 342
 343 #ifdef TC_A29K
 344         unsigned short  n_type;         /* type and derived type */
 345 #else /* TC_A29K */
 346         /* at least i960 uses long */
 347         unsigned long   n_type;         /* type and derived type */
 348 #endif /* TC_A29K */
 349
 350         char            n_sclass;       /* storage class */
 351         char            n_numaux;       /* number of aux. entries */
 352
 353 #ifndef TC_A29K
 354         char            pad2[2];        /* force alignment */
 355 #endif /* TC_A29K */
 356 };
 357
 358 #define SYMENT  struct syment
 359 #define SYMESZ  sizeof(SYMENT) /* This had better also be sizeof(AUXENT) */
 360
 361 #define n_name          _n._n_name
 362 #define n_ptr           _n._n_nptr[1]
 363 #define n_zeroes        _n._n_n._n_zeroes
 364 #define n_offset        _n._n_n._n_offset
 365
 366     /*
 367      * Relocatable symbols have number of the section in which they are defined,
 368      * or one of the following:
 369      */
 370
 371 #define N_SCNUM ((short) 1-65535) /* section num where symbol defined */
 372 #define N_UNDEF ((short)0)  /* undefined symbol */
 373 #define N_ABS   ((short)-1) /* value of symbol is absolute */
 374 #define N_DEBUG ((short)-2) /* debugging symbol -- symbol value is meaningless */
 375 #define N_TV    ((short)-3) /* indicates symbol needs preload transfer vector */
 376 #define P_TV    ((short)-4) /* indicates symbol needs transfer vector (postload) */
 377
 378 /*
 379  * Type of a symbol, in low 4 bits of the word
 380  */
 381 #define T_NULL          0 /* type not assigned */
 382 #define T_VOID          1 /* function argument (only used by compiler) (but now real void). */
 383 #define T_CHAR          2 /* character */
 384 #define T_SHORT         3 /* short integer */
 385 #define T_INT           4 /* integer */
 386 #define T_LONG          5 /* long integer */
 387 #define T_FLOAT         6 /* floating point */
 388 #define T_DOUBLE        7 /* double word */
 389 #define T_STRUCT        8 /* structure */
 390 #define T_UNION         9 /* union */
 391 #define T_ENUM          10 /* enumeration */
 392 #define T_MOE           11 /* member of enumeration */
 393 #define T_UCHAR         12 /* unsigned character */
 394 #define T_USHORT        13 /* unsigned short */
 395 #define T_UINT          14 /* unsigned integer */
 396 #define T_ULONG         15 /* unsigned long */
 397
 398 #ifdef TC_I960
 399 #define T_LNGDBL        16      /* long double */
 400 #endif /* TC_I960 */
 401
 402 /*
 403  * derived types, in n_type
 404  */
 405 #define DT_NON          (0)     /* no derived type */
 406 #define DT_PTR          (1)     /* pointer */
 407 #define DT_FCN          (2)     /* function */
 408 #define DT_ARY          (3)     /* array */
 409
 410 #ifndef TC_I960
 411
 412 #define N_BTMASK        (0x0f)
 413 #define N_TMASK         (0x30)
 414 #define N_BTSHFT        (4)
 415 #define N_TSHIFT        (2)
 416
 417 #else /* TC_I960 */
 418
 419 #define N_BTMASK        (0x1f)
 420 #define N_TMASK         (0x60)
 421 #define N_BTSHFT        (5)
 422 #define N_TSHIFT        (2)
 423
 424 #endif /* TC_I960 */
 425
 426 #define BTYPE(x)        ((x) & N_BTMASK)
 427
 428 #define ISPTR(x)        (((x) & N_TMASK) == (DT_PTR << N_BTSHFT))
 429 #define ISFCN(x)        (((x) & N_TMASK) == (DT_FCN << N_BTSHFT))
 430 #define ISARY(x)        (((x) & N_TMASK) == (DT_ARY << N_BTSHFT))
 431
 432 #define DECREF(x) ((((x)>>N_TSHIFT)&~N_BTMASK)|((x)&N_BTMASK))
 433
 434 union auxent {
 435         struct {
 436                 long x_tagndx;  /* str, un, or enum tag indx */
 437                 union {
 438                         struct {
 439                                 unsigned short x_lnno; /* declaration line number */
 440                                 unsigned short x_size; /* str/union/array size */
 441                         } x_lnsz;
 442                         long x_fsize;   /* size of function */
 443                 } x_misc;
 444                 union {
 445                         struct {                /* if ISFCN, tag, or .bb */
 446                                 long x_lnnoptr; /* ptr to fcn line # */
 447                                 long x_endndx;  /* entry ndx past block end */
 448                         } x_fcn;
 449                         struct {                /* if ISARY, up to 4 dimen. */
 450                                 unsigned short x_dimen[DIMNUM];
 451                         } x_ary;
 452                 } x_fcnary;
 453                 unsigned short x_tvndx;         /* tv index */
 454         } x_sym;
 455
 456         /* This was just a struct x_file with x_fname only in a29k.  xoxorich. */
 457         union {
 458                 char x_fname[FILNMLEN];
 459                 struct {
 460                         long x_zeroes;
 461                         long x_offset;
 462                 } x_n;
 463         } x_file;
 464
 465         struct {
 466                 long x_scnlen;                  /* section length */
 467                 unsigned short x_nreloc;        /* # relocation entries */
 468                 unsigned short x_nlinno;        /* # line numbers */
 469         } x_scn;
 470
 471         struct {
 472                 long            x_tvfill;       /* tv fill value */
 473                 unsigned short  x_tvlen;        /* length of .tv */
 474
 475                 /* This field was typo'd x_tvrna on a29k. xoxorich. */
 476                 unsigned short  x_tvran[2];     /* tv range */
 477         } x_tv;         /* info about .tv section (in auxent of symbol .tv)) */
 478
 479 #ifdef TC_I960
 480         /******************************************
 481          *  I960-specific *2nd* aux. entry formats
 482          ******************************************/
 483         struct {
 484                 /* This is a very old typo that keeps getting propogated. */
 485 #define x_stdindx x_stindx
 486                 long x_stindx;  /* sys. table entry */
 487         } x_sc; /* system call entry */
 488
 489         struct {
 490                 unsigned long x_balntry; /* BAL entry point */
 491         } x_bal; /* BAL-callable function */
 492
 493         struct {
 494                 unsigned long   x_timestamp;            /* time stamp */
 495                 char    x_idstring[20];         /* producer identity string */
 496         } x_ident;                              /* Producer ident info */
 497
 498         char a[sizeof(struct syment)];  /* force auxent/syment sizes to match */
 499 #endif /* TC_I960 */
 500 };
 501
 502 #define AUXENT  union auxent
 503 #define AUXESZ  sizeof(AUXENT) /* This had better also be sizeof(SYMENT) */
 504
 505 #if VAX || I960
 506 #       define _ETEXT   "_etext"
 507 #else
 508 #       define _ETEXT   "etext"
 509 #endif
 510
 511 /********************** RELOCATION DIRECTIVES **********************/
 512
 513 struct reloc {
 514         long r_vaddr;           /* Virtual address of reference */
 515         long r_symndx;          /* Index into symbol table */
 516         unsigned short r_type;  /* Relocation type */
 517 #ifdef TC_I960
 518         /* not used for a29k */
 519         char pad[2];            /* Unused */
 520 #endif /* TC_I960 */
 521 };
 522
 523 #define RELOC struct reloc
 524 #define RELSZ sizeof(RELOC)
 525
 526 #ifdef TC_I960
 527 #define R_RELLONG       (0x11)  /* Direct 32-bit relocation */
 528 #define R_IPRSHORT      (0x18)
 529 #define R_IPRMED        (0x19)  /* 24-bit ip-relative relocation */
 530 #define R_IPRLONG       (0x1a)
 531 #define R_OPTCALL       (0x1b)  /* 32-bit optimizable call (leafproc/sysproc) */
 532 #define R_OPTCALLX      (0x1c)  /* 64-bit optimizable call (leafproc/sysproc) */
 533 #define R_GETSEG        (0x1d)
 534 #define R_GETPA         (0x1e)
 535 #define R_TAGWORD       (0x1f)
 536 #endif /* TC_I960 */
 537
 538 #ifdef TC_A29K
 539 /*
 540  * NOTE: All the "I" forms refer to Am29000 instruction
 541  * formats.  The linker is expected to know how the numeric
 542  * information is split and/or aligned within the
 543  * instruction word(s).  R_BYTE works for instructions, too.
 544  *
 545  * If the parameter to a CONSTH instruction is a relocatable
 546  * type, two relocation records are written.  The first has
 547  * an r_type of R_IHIHALF (33 octal) and a normal r_vaddr
 548  * and r_symndx.  The second relocation record has an r_type
 549  * of R_IHCONST (34 octal), a normal r_vaddr (which is
 550  * redundant), and an r_symndx containing the 32-bit
 551  * constant offset to the relocation instead of the actual
 552  * symbol table index.  This second record is always
 553  * written, even if the constant offset is zero.  The
 554  * constant fields of the instruction are set to zero.
 555  */
 556
 557 #define R_ABS           (0x00) /* reference is absolute */
 558 #define R_IREL          (0x18) /* instruction relative (jmp/call) */
 559 #define R_IABS          (0x19) /* instruction absolute (jmp/call) */
 560 #define R_ILOHALF       (0x1a) /* instruction low half  (const)  */
 561 #define R_IHIHALF       (0x1b) /* instruction high half (consth) part 1 */
 562 #define R_IHCONST       (0x1c) /* instruction high half (consth) part 2
 563                                   constant offset of R_IHIHALF relocation */
 564 #define R_BYTE          (0x1d) /* relocatable byte value */
 565 #define R_HWORD         (0x1e) /* relocatable halfword value */
 566 #define R_WORD          (0x1f) /* relocatable word value */
 567 #define R_IGLBLRC       (0x20) /* instruction global register RC */
 568 #define R_IGLBLRA       (0x21) /* instruction global register RA */
 569 #define R_IGLBLRB       (0x22) /* instruction global register RB */
 570 #endif /* TC_A29K */
 571
 572
 573 #define DEFAULT_DATA_SECTION_ALIGNMENT 4
 574 #define DEFAULT_BSS_SECTION_ALIGNMENT 4
 575 #define DEFAULT_TEXT_SECTION_ALIGNMENT 16
 576 /* For new sections we haven't heard of before */
 577 #define DEFAULT_SECTION_ALIGNMENT 4
 578
 579 /*
 580  * Local Variables:
 581  * comment-column: 0
 582  * End:
 583  */
 584
 585 /* end of coff.gnu.h */