include/coff/ti.h

   1 /* COFF information for TI COFF support.  Definitions in this file should be
   2    customized in a target-specific file, and then this file included (see
   3    tic54x.h for an example).
   4
   5    Copyright 2000, 2001, 2002, 2003, 2008 Free Software Foundation, Inc.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  20 #ifndef COFF_TI_H
  21 #define COFF_TI_H
  22
  23 /* Note "coff/external.h is not used because TI adds extra fields to the structures.  */
  24
  25 /********************** FILE HEADER **********************/
  26
  27 struct external_filehdr
  28   {
  29     char f_magic[2];    /* magic number                 */
  30     char f_nscns[2];    /* number of sections           */
  31     char f_timdat[4];   /* time & date stamp            */
  32     char f_symptr[4];   /* file pointer to symtab       */
  33     char f_nsyms[4];    /* number of symtab entries     */
  34     char f_opthdr[2];   /* sizeof(optional hdr)         */
  35     char f_flags[2];    /* flags                        */
  36     char f_target_id[2];    /* magic no. (TI COFF-specific) */
  37   };
  38
  39 /* COFF0 has magic number in f_magic, and omits f_target_id from the file
  40    header; for later versions, f_magic is 0xC1 for COFF1 and 0xC2 for COFF2
  41    and the target-specific magic number is found in f_target_id */
  42
  43 #define TICOFF0MAGIC    TI_TARGET_ID
  44 #define TICOFF1MAGIC    0x00C1
  45 #define TICOFF2MAGIC    0x00C2
  46 #define TICOFF_AOUT_MAGIC    0x0108 /* magic number in optional header */
  47 #define TICOFF          1 /* customize coffcode.h */
  48
  49 /* The target_id field changes depending on the particular CPU target */
  50 /* for COFF0, the target id appeared in f_magic, where COFFX magic is now */
  51 #ifndef TI_TARGET_ID
  52 #error "TI_TARGET_ID needs to be defined for your CPU"
  53 #endif
  54
  55 /* Which bfd_arch to use... */
  56 #ifndef TICOFF_TARGET_ARCH
  57 #error "TICOFF_TARGET_ARCH needs to be defined for your CPU"
  58 #endif
  59
  60 #ifndef TICOFF_TARGET_MACHINE_GET
  61 #define TICOFF_TARGET_MACHINE_GET(FLAGS) 0
  62 #endif
  63
  64 #ifndef TICOFF_TARGET_MACHINE_SET
  65 #define TICOFF_TARGET_MACHINE_SET(FLAGSP, MACHINE)
  66 #endif
  67
  68 /* Default to COFF2 for file output */
  69 #ifndef TICOFF_DEFAULT_MAGIC
  70 #define TICOFF_DEFAULT_MAGIC TICOFF2MAGIC
  71 #endif
  72
  73 /* This value is made available in the rare case where a bfd is unavailable */
  74 #ifndef OCTETS_PER_BYTE_POWER
  75 #error "OCTETS_PER_BYTE_POWER not defined for this CPU"
  76 #else
  77 #define OCTETS_PER_BYTE (1<<OCTETS_PER_BYTE_POWER)
  78 #endif
  79
  80 /* default alignment is on a byte (not octet!) boundary */
  81 #ifndef COFF_DEFAULT_SECTION_ALIGNMENT_POWER
  82 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER 0
  83 #endif
  84
  85 /* TI COFF encodes the section alignment in the section header flags */
  86 #define COFF_ALIGN_IN_SECTION_HEADER 1
  87 #define COFF_ALIGN_IN_S_FLAGS 1
  88 /* requires a power-of-two argument */
  89 #define COFF_ENCODE_ALIGNMENT(S,X) ((S).s_flags |= (((unsigned)(X)&0xF)<<8))
  90 /* result is a power of two */
  91 #define COFF_DECODE_ALIGNMENT(X) (((X)>>8)&0xF)
  92
  93 #define COFF0_P(ABFD) (bfd_coff_filhsz(ABFD) == FILHSZ_V0)
  94 #define COFF2_P(ABFD) (bfd_coff_scnhsz(ABFD) != SCNHSZ_V01)
  95
  96 #define COFF0_BADMAG(x) ((x).f_magic != TICOFF0MAGIC)
  97 #define COFF1_BADMAG(x) ((x).f_magic != TICOFF1MAGIC || (x).f_target_id != TI_TARGET_ID)
  98 #define COFF2_BADMAG(x) ((x).f_magic != TICOFF2MAGIC || (x).f_target_id != TI_TARGET_ID)
  99
 100 /* we need to read/write an extra field in the coff file header */
 101 #ifndef COFF_ADJUST_FILEHDR_IN_POST
 102 #define COFF_ADJUST_FILEHDR_IN_POST(abfd, src, dst) \
 103   do                                                                    \
 104     {                                                                   \
 105       if (!COFF0_P (abfd))                                              \
 106         ((struct internal_filehdr *)(dst))->f_target_id =               \
 107           H_GET_16 (abfd, ((FILHDR *)(src))->f_target_id);              \
 108     }                                                                   \
 109   while (0)
 110 #endif
 111
 112 #ifndef COFF_ADJUST_FILEHDR_OUT_POST
 113 #define COFF_ADJUST_FILEHDR_OUT_POST(abfd, src, dst) \
 114   do                                                                     \
 115     {                                                                    \
 116       if (!COFF0_P (abfd))                                               \
 117         H_PUT_16 (abfd, ((struct internal_filehdr *)(src))->f_target_id, \
 118                  ((FILHDR *)(dst))->f_target_id);                        \
 119     }                                                                    \
 120   while (0)
 121 #endif
 122
 123 #define FILHDR  struct external_filehdr
 124 #define FILHSZ  22
 125 #define FILHSZ_V0 20                /* COFF0 omits target_id field */
 126
 127 /* File header flags */
 128 #define F_RELFLG        (0x0001)
 129 #define F_EXEC          (0x0002)
 130 #define F_LNNO          (0x0004)
 131 #define F_VERS          (0x0010) /* TMS320C4x code */
 132 /* F_LSYMS needs to be redefined in your source file */
 133 #define F_LSYMS_TICOFF  (0x0010) /* normal COFF is 0x8 */
 134
 135 #define F_10            0x00    /* file built for TMS320C1x devices */
 136 #define F_20            0x10    /* file built for TMS320C2x devices */
 137 #define F_25            0x20    /* file built for TMS320C2x/C5x devices */
 138 #define F_LENDIAN       0x0100  /* 16 bits/word, LSB first */
 139 #define F_SYMMERGE      0x1000  /* duplicate symbols were removed */
 140
 141 /********************** OPTIONAL HEADER **********************/
 142
 143
 144 typedef struct
 145 {
 146   char  magic[2];               /* type of file (0x108)                 */
 147   char  vstamp[2];              /* version stamp                        */
 148   char  tsize[4];               /* text size in bytes, padded to FW bdry*/
 149   char  dsize[4];               /* initialized data "  "                */
 150   char  bsize[4];               /* uninitialized data "   "             */
 151   char  entry[4];               /* entry pt.                            */
 152   char  text_start[4];          /* base of text used for this file */
 153   char  data_start[4];          /* base of data used for this file */
 154 }
 155 AOUTHDR;
 156
 157
 158 #define AOUTHDRSZ 28
 159 #define AOUTSZ 28
 160
 161
 162 /********************** SECTION HEADER **********************/
 163 /* COFF0, COFF1 */
 164 struct external_scnhdr_v01 {
 165         char            s_name[8];      /* section name                 */
 166         char            s_paddr[4];     /* physical address, aliased s_nlib */
 167         char            s_vaddr[4];     /* virtual address              */
 168         char            s_size[4];      /* section size (in WORDS)      */
 169         char            s_scnptr[4];    /* file ptr to raw data for section */
 170         char            s_relptr[4];    /* file ptr to relocation       */
 171         char            s_lnnoptr[4];   /* file ptr to line numbers     */
 172         char            s_nreloc[2];    /* number of relocation entries */
 173         char            s_nlnno[2];     /* number of line number entries*/
 174         char            s_flags[2];     /* flags                        */
 175         char            s_reserved[1];  /* reserved                     */
 176         char            s_page[1];      /* section page number (LOAD)   */
 177 };
 178
 179 /* COFF2 */
 180 struct external_scnhdr {
 181         char            s_name[8];      /* section name                 */
 182         char            s_paddr[4];     /* physical address, aliased s_nlib */
 183         char            s_vaddr[4];     /* virtual address              */
 184         char            s_size[4];      /* section size (in WORDS)      */
 185         char            s_scnptr[4];    /* file ptr to raw data for section */
 186         char            s_relptr[4];    /* file ptr to relocation       */
 187         char            s_lnnoptr[4];   /* file ptr to line numbers     */
 188         char            s_nreloc[4];    /* number of relocation entries */
 189         char            s_nlnno[4];     /* number of line number entries*/
 190         char            s_flags[4];     /* flags                        */
 191         char            s_reserved[2];  /* reserved                     */
 192         char            s_page[2];      /* section page number (LOAD)   */
 193 };
 194
 195 /*
 196  * Special section flags
 197  */
 198
 199 /* TI COFF defines these flags;
 200    STYP_CLINK: the section should be excluded from the final
 201    linker output if there are no references found to any symbol in the section
 202    STYP_BLOCK: the section should be blocked, i.e. if the section would cross
 203    a page boundary, it is started at a page boundary instead.
 204    TI COFF puts the section alignment power of two in the section flags
 205    e.g. 2**N is alignment, flags |= (N & 0xF) << 8
 206 */
 207 #define STYP_CLINK      (0x4000)
 208 #define STYP_BLOCK      (0x1000)
 209 #define STYP_ALIGN      (0x0F00) /* TI COFF stores section alignment here */
 210
 211 #define SCNHDR_V01 struct external_scnhdr_v01
 212 #define SCNHDR struct external_scnhdr
 213 #define SCNHSZ_V01 40                  /* for v0 and v1 */
 214 #define SCNHSZ 48
 215
 216 /* COFF2 changes the offsets and sizes of these fields
 217    Assume we're dealing with the COFF2 scnhdr structure, and adjust
 218    accordingly.  Note: The GNU C versions of some of these macros
 219    are necessary in order to avoid compile time warnings triggered
 220    gcc's array bounds checking.  The PUT_SCNHDR_PAGE macro also has
 221    the advantage on not evaluating LOC twice.  */
 222
 223 #define GET_SCNHDR_NRELOC(ABFD, LOC) \
 224   (COFF2_P (ABFD) ? H_GET_32 (ABFD, LOC) : H_GET_16 (ABFD, LOC))
 225 #define PUT_SCNHDR_NRELOC(ABFD, VAL, LOC) \
 226   (COFF2_P (ABFD) ? H_PUT_32 (ABFD, VAL, LOC) : H_PUT_16 (ABFD, VAL, LOC))
 227 #ifdef __GNUC__
 228 #define GET_SCNHDR_NLNNO(ABFD, LOC) \
 229   ({ \
 230     int nlnno;          \
 231     char * ptr = (LOC); \
 232     if (COFF2_P (ABFD)) \
 233       nlnno = H_GET_32 (ABFD, ptr); \
 234     else \
 235       nlnno = H_GET_16 (ABFD, ptr - 2); \
 236     nlnno; \
 237   })
 238 #define PUT_SCNHDR_NLNNO(ABFD, VAL, LOC) \
 239   do \
 240     { \
 241       char * ptr = (LOC); \
 242       if (COFF2_P (ABFD)) \
 243         H_PUT_32 (ABFD, VAL, ptr); \
 244       else \
 245         H_PUT_16 (ABFD, VAL, ptr - 2); \
 246     } \
 247   while (0)
 248 #define GET_SCNHDR_FLAGS(ABFD, LOC) \
 249   ({ \
 250     int flags; \
 251     char * ptr = (LOC); \
 252     if (COFF2_P (ABFD)) \
 253       flags = H_GET_32 (ABFD, ptr); \
 254     else \
 255       flags = H_GET_16 (ABFD, ptr - 4); \
 256     flags; \
 257   })
 258 #define PUT_SCNHDR_FLAGS(ABFD, VAL, LOC) \
 259   do \
 260     { \
 261       char * ptr = (LOC); \
 262       if (COFF2_P (ABFD)) \
 263         H_PUT_32 (ABFD, VAL, ptr); \
 264       else \
 265         H_PUT_16 (ABFD, VAL, ptr - 4); \
 266     } \
 267   while (0)
 268 #define GET_SCNHDR_PAGE(ABFD, LOC) \
 269   ({ \
 270     unsigned page; \
 271     char * ptr = (LOC); \
 272     if (COFF2_P (ABFD)) \
 273       page = H_GET_16 (ABFD, ptr); \
 274     else \
 275       page = (unsigned) H_GET_8 (ABFD, ptr - 7); \
 276     page; \
 277   })
 278 /* On output, make sure that the "reserved" field is zero.  */
 279 #define PUT_SCNHDR_PAGE(ABFD, VAL, LOC) \
 280   do \
 281     { \
 282       char * ptr = (LOC); \
 283       if (COFF2_P (ABFD)) \
 284         H_PUT_16 (ABFD, VAL, ptr); \
 285       else \
 286         { \
 287           H_PUT_8 (ABFD, VAL, ptr - 7); \
 288           H_PUT_8 (ABFD, 0, ptr - 8); \
 289         } \
 290     } \
 291   while (0)
 292 #else
 293 #define GET_SCNHDR_NLNNO(ABFD, LOC) \
 294   (COFF2_P (ABFD) ? H_GET_32 (ABFD, LOC) : H_GET_16 (ABFD, (LOC) - 2))
 295 #define PUT_SCNHDR_NLNNO(ABFD, VAL, LOC) \
 296   (COFF2_P (ABFD) ? H_PUT_32 (ABFD, VAL, LOC) : H_PUT_16 (ABFD, VAL, (LOC) - 2))
 297 #define GET_SCNHDR_FLAGS(ABFD, LOC) \
 298   (COFF2_P (ABFD) ? H_GET_32 (ABFD, LOC) : H_GET_16 (ABFD, (LOC) - 4))
 299 #define PUT_SCNHDR_FLAGS(ABFD, VAL, LOC) \
 300   (COFF2_P (ABFD) ? H_PUT_32 (ABFD, VAL, LOC) : H_PUT_16 (ABFD, VAL, (LOC) - 4))
 301 #define GET_SCNHDR_PAGE(ABFD, LOC) \
 302   (COFF2_P (ABFD) ? H_GET_16 (ABFD, LOC) : (unsigned) H_GET_8 (ABFD, (LOC) - 7))
 303 /* On output, make sure that the "reserved" field is zero.  */
 304 #define PUT_SCNHDR_PAGE(ABFD, VAL, LOC) \
 305   (COFF2_P (ABFD) \
 306    ? H_PUT_16 (ABFD, VAL, LOC) \
 307    : H_PUT_8 (ABFD, VAL, (LOC) - 7), H_PUT_8 (ABFD, 0, (LOC) - 8))
 308 #endif
 309
 310
 311 /* TI COFF stores section size as number of bytes (address units, not octets),
 312    so adjust to be number of octets, which is what BFD expects */
 313 #define GET_SCNHDR_SIZE(ABFD, SZP) \
 314   (H_GET_32 (ABFD, SZP) * bfd_octets_per_byte (ABFD))
 315 #define PUT_SCNHDR_SIZE(ABFD, SZ, SZP) \
 316   H_PUT_32 (ABFD, (SZ) / bfd_octets_per_byte (ABFD), SZP)
 317
 318 #define COFF_ADJUST_SCNHDR_IN_POST(ABFD, EXT, INT) \
 319   do                                                                    \
 320     {                                                                   \
 321       ((struct internal_scnhdr *)(INT))->s_page =                       \
 322         GET_SCNHDR_PAGE (ABFD, ((SCNHDR *)(EXT))->s_page);              \
 323     }                                                                   \
 324    while (0)
 325
 326 /* The entire scnhdr may not be assigned.
 327    Ensure that everything is initialized.  */
 328 #define COFF_ADJUST_SCNHDR_OUT_PRE(ABFD, INT, EXT)      \
 329   do                                                    \
 330     {                                                   \
 331       memset((EXT), 0, sizeof (SCNHDR));                \
 332     }                                                   \
 333   while (0)
 334
 335 /* The line number and reloc overflow checking in coff_swap_scnhdr_out in
 336    coffswap.h doesn't use PUT_X for s_nlnno and s_nreloc.
 337    Due to different sized v0/v1/v2 section headers, we have to re-write these
 338    fields.
 339  */
 340 #define COFF_ADJUST_SCNHDR_OUT_POST(ABFD, INT, EXT) \
 341   do                                                                       \
 342     {                                                                      \
 343       PUT_SCNHDR_NLNNO (ABFD, ((struct internal_scnhdr *)(INT))->s_nlnno,  \
 344                         ((SCNHDR *)(EXT))->s_nlnno);                       \
 345       PUT_SCNHDR_NRELOC (ABFD, ((struct internal_scnhdr *)(INT))->s_nreloc,\
 346                          ((SCNHDR *)(EXT))->s_nreloc);                     \
 347       PUT_SCNHDR_FLAGS (ABFD, ((struct internal_scnhdr *)(INT))->s_flags,  \
 348                         ((SCNHDR *)(EXT))->s_flags);                       \
 349       PUT_SCNHDR_PAGE (ABFD, ((struct internal_scnhdr *)(INT))->s_page,    \
 350                        ((SCNHDR *)(EXT))->s_page);                         \
 351     }                                                                      \
 352    while (0)
 353
 354 /*
 355  * names of "special" sections
 356  */
 357 #define _TEXT   ".text"
 358 #define _DATA   ".data"
 359 #define _BSS    ".bss"
 360 #define _CINIT  ".cinit"            /* initialized C data */
 361 #define _SCONST  ".const"           /* constants */
 362 #define _SWITCH ".switch"           /* switch tables */
 363 #define _STACK  ".stack"            /* C stack */
 364 #define _SYSMEM ".sysmem"           /* used for malloc et al. syscalls */
 365
 366 /********************** LINE NUMBERS **********************/
 367
 368 /* 1 line number entry for every "breakpointable" source line in a section.
 369  * Line numbers are grouped on a per function basis; first entry in a function
 370  * grouping will have l_lnno = 0 and in place of physical address will be the
 371  * symbol table index of the function name.
 372  */
 373 struct external_lineno {
 374   union {
 375     char l_symndx[4];   /* function name symbol index, iff l_lnno == 0*/
 376     char l_paddr[4];    /* (physical) address of line number    */
 377   } l_addr;
 378   char l_lnno[2];       /* line number          */
 379 };
 380
 381 #define LINENO  struct external_lineno
 382 #define LINESZ  6
 383
 384
 385 /********************** SYMBOLS **********************/
 386
 387 /* NOTE: this is what a local label looks like in assembly source; what it
 388    looks like in COFF output is undefined */
 389 #define TICOFF_LOCAL_LABEL_P(NAME) \
 390 ((NAME[0] == '$' && NAME[1] >= '0' && NAME[1] <= '9' && NAME[2] == '\0') \
 391  || NAME[strlen(NAME)-1] == '?')
 392
 393 #define E_SYMNMLEN      8       /* # characters in a symbol name        */
 394 #define E_FILNMLEN      14      /* # characters in a file name          */
 395 #define E_DIMNUM        4       /* # array dimensions in auxiliary entry */
 396
 397 struct external_syment
 398 {
 399   union {
 400     char e_name[E_SYMNMLEN];
 401     struct {
 402       char e_zeroes[4];
 403       char e_offset[4];
 404     } e;
 405   } e;
 406   char e_value[4];
 407   char e_scnum[2];
 408   char e_type[2];
 409   char e_sclass[1];
 410   char e_numaux[1];
 411 };
 412
 413
 414 #define N_BTMASK        (017)
 415 #define N_TMASK         (060)
 416 #define N_BTSHFT        (4)
 417 #define N_TSHIFT        (2)
 418
 419
 420 union external_auxent {
 421   struct {
 422         char x_tagndx[4];       /* str, un, or enum tag indx */
 423         union {
 424           struct {
 425                 char  x_lnno[2]; /* declaration line number */
 426                 char  x_size[2]; /* str/union/array size */
 427           } x_lnsz;
 428           char x_fsize[4];      /* size of function */
 429         } x_misc;
 430         union {
 431           struct {              /* if ISFCN, tag, or .bb */
 432                 char x_lnnoptr[4];      /* ptr to fcn line # */
 433                 char x_endndx[4];       /* entry ndx past block end */
 434           } x_fcn;
 435           struct {              /* if ISARY, up to 4 dimen. */
 436                 char x_dimen[E_DIMNUM][2];
 437           } x_ary;
 438         } x_fcnary;
 439         char x_tvndx[2];                /* tv index */
 440   } x_sym;
 441
 442   union {
 443         char x_fname[E_FILNMLEN];
 444         struct {
 445           char x_zeroes[4];
 446           char x_offset[4];
 447         } x_n;
 448   } x_file;
 449
 450   struct {
 451         char x_scnlen[4];                       /* section length */
 452         char x_nreloc[2];       /* # relocation entries */
 453         char x_nlinno[2];       /* # line numbers */
 454   } x_scn;
 455
 456   struct {
 457         char x_tvfill[4];       /* tv fill value */
 458         char x_tvlen[2];        /* length of .tv */
 459         char x_tvran[2][2];     /* tv range */
 460   } x_tv;               /* info about .tv section (in auxent of symbol .tv)) */
 461
 462
 463 };
 464
 465 #define SYMENT  struct external_syment
 466 #define SYMESZ  18
 467 #define AUXENT  union external_auxent
 468 #define AUXESZ  18
 469
 470 /* section lengths are in target bytes (not host bytes) */
 471 #define GET_SCN_SCNLEN(ABFD, EXT) \
 472   (H_GET_32 (ABFD, (EXT)->x_scn.x_scnlen) * bfd_octets_per_byte (ABFD))
 473 #define PUT_SCN_SCNLEN(ABFD, INT, EXT) \
 474   H_PUT_32 (ABFD, (INT) / bfd_octets_per_byte (ABFD), (EXT)->x_scn.x_scnlen)
 475
 476 /* lnsz size is in bits in COFF file, in bytes in BFD */
 477 #define GET_LNSZ_SIZE(abfd, ext) \
 478  (H_GET_16 (abfd, ext->x_sym.x_misc.x_lnsz.x_size) / (class != C_FIELD ? 8 : 1))
 479
 480 #define PUT_LNSZ_SIZE(abfd, in, ext) \
 481   H_PUT_16 (abfd, ((class != C_FIELD) ? (in) * 8 : (in)), \
 482            ext->x_sym.x_misc.x_lnsz.x_size)
 483
 484 /* TI COFF stores offsets for MOS and MOU in bits; BFD expects bytes
 485    Also put the load page flag of the section into the symbol value if it's an
 486    address.  */
 487 #ifndef NEEDS_PAGE
 488 #define NEEDS_PAGE(X) 0
 489 #define PAGE_MASK 0
 490 #endif
 491 #define COFF_ADJUST_SYM_IN_POST(ABFD, EXT, INT) \
 492   do                                                                    \
 493     {                                                                   \
 494       struct internal_syment *dst = (struct internal_syment *)(INT);    \
 495       if (dst->n_sclass == C_MOS || dst->n_sclass == C_MOU)             \
 496         dst->n_value /= 8;                                              \
 497       else if (NEEDS_PAGE (dst->n_sclass)) {                            \
 498         asection *scn = coff_section_from_bfd_index (abfd, dst->n_scnum); \
 499         dst->n_value |= (scn->lma & PAGE_MASK);                         \
 500       }                                                                 \
 501     }                                                                   \
 502    while (0)
 503
 504 #define COFF_ADJUST_SYM_OUT_POST(ABFD, INT, EXT) \
 505   do                                                                    \
 506     {                                                                   \
 507        struct internal_syment *src = (struct internal_syment *)(INT);   \
 508        SYMENT *dst = (SYMENT *)(EXT);                                   \
 509        if (src->n_sclass == C_MOU || src->n_sclass == C_MOS)            \
 510          H_PUT_32 (abfd, src->n_value * 8, dst->e_value);               \
 511        else if (NEEDS_PAGE (src->n_sclass)) {                           \
 512          H_PUT_32 (abfd, src->n_value &= ~PAGE_MASK, dst->e_value);     \
 513        }                                                                \
 514     }                                                                   \
 515    while (0)
 516
 517 /* Detect section-relative absolute symbols so they get flagged with a sym
 518    index of -1.
 519 */
 520 #define SECTION_RELATIVE_ABSOLUTE_SYMBOL_P(RELOC, SECT) \
 521   ((*(RELOC)->sym_ptr_ptr)->section->output_section == (SECT) \
 522    && (RELOC)->howto->name[0] == 'A')
 523
 524 /********************** RELOCATION DIRECTIVES **********************/
 525
 526 struct external_reloc_v0
 527 {
 528   char r_vaddr[4];
 529   char r_symndx[2];
 530   char r_reserved[2];
 531   char r_type[2];
 532 };
 533
 534 struct external_reloc
 535 {
 536   char r_vaddr[4];
 537   char r_symndx[4];
 538   char r_reserved[2]; /* extended pmad byte for COFF2 */
 539   char r_type[2];
 540 };
 541
 542 #define RELOC struct external_reloc
 543 #define RELSZ_V0 10                 /* FIXME -- coffcode.h needs fixing */
 544 #define RELSZ 12                    /* for COFF1/2 */
 545
 546 /* various relocation types.  */
 547 #define R_ABS     0x0000            /* no relocation */
 548 #define R_REL13   0x002A            /* 13-bit direct reference (???) */
 549 #define R_PARTLS7 0x0028            /* 7 LSBs of an address */
 550 #define R_PARTMS9 0x0029            /* 9MSBs of an address */
 551 #define R_EXTWORD 0x002B            /* 23-bit direct reference */
 552 #define R_EXTWORD16 0x002C          /* 16-bit direct reference to 23-bit addr*/
 553 #define R_EXTWORDMS7 0x002D         /* upper 7 bits of 23-bit address */
 554
 555 #endif /* COFF_TI_H */