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, 2005, 2008, 2009
   6    Free Software Foundation, Inc.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  21 #ifndef COFF_TI_H
  22 #define COFF_TI_H
  23
  24 /* Note "coff/external.h is not used because TI adds extra fields to the structures.  */
  25
  26 /********************** FILE HEADER **********************/
  27
  28 struct external_filehdr
  29   {
  30     char f_magic[2];    /* magic number                 */
  31     char f_nscns[2];    /* number of sections           */
  32     char f_timdat[4];   /* time & date stamp            */
  33     char f_symptr[4];   /* file pointer to symtab       */
  34     char f_nsyms[4];    /* number of symtab entries     */
  35     char f_opthdr[2];   /* sizeof(optional hdr)         */
  36     char f_flags[2];    /* flags                        */
  37     char f_target_id[2];    /* magic no. (TI COFF-specific) */
  38   };
  39
  40 /* COFF0 has magic number in f_magic, and omits f_target_id from the file
  41    header; for later versions, f_magic is 0xC1 for COFF1 and 0xC2 for COFF2
  42    and the target-specific magic number is found in f_target_id */
  43
  44 #define TICOFF0MAGIC    TI_TARGET_ID
  45 #define TICOFF1MAGIC    0x00C1
  46 #define TICOFF2MAGIC    0x00C2
  47 #define TICOFF_AOUT_MAGIC    0x0108 /* magic number in optional header */
  48 #define TICOFF          1 /* customize coffcode.h */
  49
  50 /* The target_id field changes depending on the particular CPU target */
  51 /* for COFF0, the target id appeared in f_magic, where COFFX magic is now */
  52 #ifndef TI_TARGET_ID
  53 #error "TI_TARGET_ID needs to be defined for your CPU"
  54 #endif
  55
  56 /* Which bfd_arch to use... */
  57 #ifndef TICOFF_TARGET_ARCH
  58 #error "TICOFF_TARGET_ARCH needs to be defined for your CPU"
  59 #endif
  60
  61 #ifndef TICOFF_TARGET_MACHINE_GET
  62 #define TICOFF_TARGET_MACHINE_GET(FLAGS) 0
  63 #endif
  64
  65 #ifndef TICOFF_TARGET_MACHINE_SET
  66 #define TICOFF_TARGET_MACHINE_SET(FLAGSP, MACHINE)
  67 #endif
  68
  69 /* Default to COFF2 for file output */
  70 #ifndef TICOFF_DEFAULT_MAGIC
  71 #define TICOFF_DEFAULT_MAGIC TICOFF2MAGIC
  72 #endif
  73
  74 /* This value is made available in the rare case where a bfd is unavailable */
  75 #ifndef OCTETS_PER_BYTE_POWER
  76 #error "OCTETS_PER_BYTE_POWER not defined for this CPU"
  77 #else
  78 #define OCTETS_PER_BYTE (1<<OCTETS_PER_BYTE_POWER)
  79 #endif
  80
  81 /* default alignment is on a byte (not octet!) boundary */
  82 #ifndef COFF_DEFAULT_SECTION_ALIGNMENT_POWER
  83 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER 0
  84 #endif
  85
  86 /* TI COFF encodes the section alignment in the section header flags */
  87 #define COFF_ALIGN_IN_SECTION_HEADER 1
  88 #define COFF_ALIGN_IN_S_FLAGS 1
  89 /* requires a power-of-two argument */
  90 #define COFF_ENCODE_ALIGNMENT(S,X) ((S).s_flags |= (((unsigned)(X)&0xF)<<8))
  91 /* result is a power of two */
  92 #define COFF_DECODE_ALIGNMENT(X) (((X)>>8)&0xF)
  93
  94 #define COFF0_P(ABFD) (bfd_coff_filhsz(ABFD) == FILHSZ_V0)
  95 #define COFF2_P(ABFD) (bfd_coff_scnhsz(ABFD) != SCNHSZ_V01)
  96
  97 #define COFF0_BADMAG(x) ((x).f_magic != TICOFF0MAGIC)
  98 #define COFF1_BADMAG(x) ((x).f_magic != TICOFF1MAGIC || (x).f_target_id != TI_TARGET_ID)
  99 #define COFF2_BADMAG(x) ((x).f_magic != TICOFF2MAGIC || (x).f_target_id != TI_TARGET_ID)
 100
 101 /* we need to read/write an extra field in the coff file header */
 102 #ifndef COFF_ADJUST_FILEHDR_IN_POST
 103 #define COFF_ADJUST_FILEHDR_IN_POST(abfd, src, dst) \
 104   do                                                                    \
 105     {                                                                   \
 106       if (!COFF0_P (abfd))                                              \
 107         ((struct internal_filehdr *)(dst))->f_target_id =               \
 108           H_GET_16 (abfd, ((FILHDR *)(src))->f_target_id);              \
 109     }                                                                   \
 110   while (0)
 111 #endif
 112
 113 #ifndef COFF_ADJUST_FILEHDR_OUT_POST
 114 #define COFF_ADJUST_FILEHDR_OUT_POST(abfd, src, dst) \
 115   do                                                                     \
 116     {                                                                    \
 117       if (!COFF0_P (abfd))                                               \
 118         H_PUT_16 (abfd, ((struct internal_filehdr *)(src))->f_target_id, \
 119                  ((FILHDR *)(dst))->f_target_id);                        \
 120     }                                                                    \
 121   while (0)
 122 #endif
 123
 124 #define FILHDR  struct external_filehdr
 125 #define FILHSZ  22
 126 #define FILHSZ_V0 20                /* COFF0 omits target_id field */
 127
 128 /* File header flags */
 129 #define F_RELFLG        (0x0001)
 130 #define F_EXEC          (0x0002)
 131 #define F_LNNO          (0x0004)
 132 #define F_VERS          (0x0010) /* TMS320C4x code */
 133 /* F_LSYMS needs to be redefined in your source file */
 134 #define F_LSYMS_TICOFF  (0x0010) /* normal COFF is 0x8 */
 135
 136 #define F_10            0x00    /* file built for TMS320C1x devices */
 137 #define F_20            0x10    /* file built for TMS320C2x devices */
 138 #define F_25            0x20    /* file built for TMS320C2x/C5x devices */
 139 #define F_LENDIAN       0x0100  /* 16 bits/word, LSB first */
 140 #define F_SYMMERGE      0x1000  /* duplicate symbols were removed */
 141
 142 /********************** OPTIONAL HEADER **********************/
 143
 144
 145 typedef struct
 146 {
 147   char  magic[2];               /* type of file (0x108)                 */
 148   char  vstamp[2];              /* version stamp                        */
 149   char  tsize[4];               /* text size in bytes, padded to FW bdry*/
 150   char  dsize[4];               /* initialized data "  "                */
 151   char  bsize[4];               /* uninitialized data "   "             */
 152   char  entry[4];               /* entry pt.                            */
 153   char  text_start[4];          /* base of text used for this file */
 154   char  data_start[4];          /* base of data used for this file */
 155 }
 156 AOUTHDR;
 157
 158
 159 #define AOUTHDRSZ 28
 160 #define AOUTSZ 28
 161
 162
 163 /********************** SECTION HEADER **********************/
 164 /* COFF0, COFF1 */
 165 struct external_scnhdr_v01 {
 166         char            s_name[8];      /* section name                 */
 167         char            s_paddr[4];     /* physical address, aliased s_nlib */
 168         char            s_vaddr[4];     /* virtual address              */
 169         char            s_size[4];      /* section size (in WORDS)      */
 170         char            s_scnptr[4];    /* file ptr to raw data for section */
 171         char            s_relptr[4];    /* file ptr to relocation       */
 172         char            s_lnnoptr[4];   /* file ptr to line numbers     */
 173         char            s_nreloc[2];    /* number of relocation entries */
 174         char            s_nlnno[2];     /* number of line number entries*/
 175         char            s_flags[2];     /* flags                        */
 176         char            s_reserved[1];  /* reserved                     */
 177         char            s_page[1];      /* section page number (LOAD)   */
 178 };
 179
 180 /* COFF2 */
 181 struct external_scnhdr {
 182         char            s_name[8];      /* section name                 */
 183         char            s_paddr[4];     /* physical address, aliased s_nlib */
 184         char            s_vaddr[4];     /* virtual address              */
 185         char            s_size[4];      /* section size (in WORDS)      */
 186         char            s_scnptr[4];    /* file ptr to raw data for section */
 187         char            s_relptr[4];    /* file ptr to relocation       */
 188         char            s_lnnoptr[4];   /* file ptr to line numbers     */
 189         char            s_nreloc[4];    /* number of relocation entries */
 190         char            s_nlnno[4];     /* number of line number entries*/
 191         char            s_flags[4];     /* flags                        */
 192         char            s_reserved[2];  /* reserved                     */
 193         char            s_page[2];      /* section page number (LOAD)   */
 194 };
 195
 196 /*
 197  * Special section flags
 198  */
 199
 200 /* TI COFF defines these flags;
 201    STYP_CLINK: the section should be excluded from the final
 202    linker output if there are no references found to any symbol in the section
 203    STYP_BLOCK: the section should be blocked, i.e. if the section would cross
 204    a page boundary, it is started at a page boundary instead.
 205    TI COFF puts the section alignment power of two in the section flags
 206    e.g. 2**N is alignment, flags |= (N & 0xF) << 8
 207 */
 208 #define STYP_CLINK      (0x4000)
 209 #define STYP_BLOCK      (0x1000)
 210 #define STYP_ALIGN      (0x0F00) /* TI COFF stores section alignment here */
 211
 212 #define SCNHDR_V01 struct external_scnhdr_v01
 213 #define SCNHDR struct external_scnhdr
 214 #define SCNHSZ_V01 40                  /* for v0 and v1 */
 215 #define SCNHSZ 48
 216
 217 /* COFF2 changes the offsets and sizes of these fields
 218    Assume we're dealing with the COFF2 scnhdr structure, and adjust
 219    accordingly.  Note: The GNU C versions of some of these macros
 220    are necessary in order to avoid compile time warnings triggered
 221    gcc's array bounds checking.  The PUT_SCNHDR_PAGE macro also has
 222    the advantage on not evaluating LOC twice.  */
 223
 224 #define GET_SCNHDR_NRELOC(ABFD, LOC) \
 225   (COFF2_P (ABFD) ? H_GET_32 (ABFD, LOC) : H_GET_16 (ABFD, LOC))
 226 #define PUT_SCNHDR_NRELOC(ABFD, VAL, LOC) \
 227   (COFF2_P (ABFD) ? H_PUT_32 (ABFD, VAL, LOC) : H_PUT_16 (ABFD, VAL, LOC))
 228 #ifdef __GNUC__
 229 #define GET_SCNHDR_NLNNO(ABFD, LOC) \
 230   ({ \
 231     int nlnno;          \
 232     char * ptr = (LOC); \
 233     if (COFF2_P (ABFD)) \
 234       nlnno = H_GET_32 (ABFD, ptr); \
 235     else \
 236       nlnno = H_GET_16 (ABFD, ptr - 2); \
 237     nlnno; \
 238   })
 239 #define PUT_SCNHDR_NLNNO(ABFD, VAL, LOC) \
 240   do \
 241     { \
 242       char * ptr = (LOC); \
 243       if (COFF2_P (ABFD)) \
 244         H_PUT_32 (ABFD, VAL, ptr); \
 245       else \
 246         H_PUT_16 (ABFD, VAL, ptr - 2); \
 247     } \
 248   while (0)
 249 #define GET_SCNHDR_FLAGS(ABFD, LOC) \
 250   ({ \
 251     int flags; \
 252     char * ptr = (LOC); \
 253     if (COFF2_P (ABFD)) \
 254       flags = H_GET_32 (ABFD, ptr); \
 255     else \
 256       flags = H_GET_16 (ABFD, ptr - 4); \
 257     flags; \
 258   })
 259 #define PUT_SCNHDR_FLAGS(ABFD, VAL, LOC) \
 260   do \
 261     { \
 262       char * ptr = (LOC); \
 263       if (COFF2_P (ABFD)) \
 264         H_PUT_32 (ABFD, VAL, ptr); \
 265       else \
 266         H_PUT_16 (ABFD, VAL, ptr - 4); \
 267     } \
 268   while (0)
 269 #define GET_SCNHDR_PAGE(ABFD, LOC) \
 270   ({ \
 271     unsigned page; \
 272     char * ptr = (LOC); \
 273     if (COFF2_P (ABFD)) \
 274       page = H_GET_16 (ABFD, ptr); \
 275     else \
 276       page = (unsigned) H_GET_8 (ABFD, ptr - 7); \
 277     page; \
 278   })
 279 /* On output, make sure that the "reserved" field is zero.  */
 280 #define PUT_SCNHDR_PAGE(ABFD, VAL, LOC) \
 281   do \
 282     { \
 283       char * ptr = (LOC); \
 284       if (COFF2_P (ABFD)) \
 285         H_PUT_16 (ABFD, VAL, ptr); \
 286       else \
 287         { \
 288           H_PUT_8 (ABFD, VAL, ptr - 7); \
 289           H_PUT_8 (ABFD, 0, ptr - 8); \
 290         } \
 291     } \
 292   while (0)
 293 #else
 294 #define GET_SCNHDR_NLNNO(ABFD, LOC) \
 295   (COFF2_P (ABFD) ? H_GET_32 (ABFD, LOC) : H_GET_16 (ABFD, (LOC) - 2))
 296 #define PUT_SCNHDR_NLNNO(ABFD, VAL, LOC) \
 297   (COFF2_P (ABFD) ? H_PUT_32 (ABFD, VAL, LOC) : H_PUT_16 (ABFD, VAL, (LOC) - 2))
 298 #define GET_SCNHDR_FLAGS(ABFD, LOC) \
 299   (COFF2_P (ABFD) ? H_GET_32 (ABFD, LOC) : H_GET_16 (ABFD, (LOC) - 4))
 300 #define PUT_SCNHDR_FLAGS(ABFD, VAL, LOC) \
 301   (COFF2_P (ABFD) ? H_PUT_32 (ABFD, VAL, LOC) : H_PUT_16 (ABFD, VAL, (LOC) - 4))
 302 #define GET_SCNHDR_PAGE(ABFD, LOC) \
 303   (COFF2_P (ABFD) ? H_GET_16 (ABFD, LOC) : (unsigned) H_GET_8 (ABFD, (LOC) - 7))
 304 /* On output, make sure that the "reserved" field is zero.  */
 305 #define PUT_SCNHDR_PAGE(ABFD, VAL, LOC) \
 306   (COFF2_P (ABFD) \
 307    ? H_PUT_16 (ABFD, VAL, LOC) \
 308    : H_PUT_8 (ABFD, VAL, (LOC) - 7), H_PUT_8 (ABFD, 0, (LOC) - 8))
 309 #endif
 310
 311
 312 /* TI COFF stores section size as number of bytes (address units, not octets),
 313    so adjust to be number of octets, which is what BFD expects */
 314 #define GET_SCNHDR_SIZE(ABFD, SZP) \
 315   (H_GET_32 (ABFD, SZP) * bfd_octets_per_byte (ABFD))
 316 #define PUT_SCNHDR_SIZE(ABFD, SZ, SZP) \
 317   H_PUT_32 (ABFD, (SZ) / bfd_octets_per_byte (ABFD), SZP)
 318
 319 #define COFF_ADJUST_SCNHDR_IN_POST(ABFD, EXT, INT) \
 320   do                                                                    \
 321     {                                                                   \
 322       ((struct internal_scnhdr *)(INT))->s_page =                       \
 323         GET_SCNHDR_PAGE (ABFD, ((SCNHDR *)(EXT))->s_page);              \
 324     }                                                                   \
 325    while (0)
 326
 327 /* The entire scnhdr may not be assigned.
 328    Ensure that everything is initialized.  */
 329 #define COFF_ADJUST_SCNHDR_OUT_PRE(ABFD, INT, EXT)      \
 330   do                                                    \
 331     {                                                   \
 332       memset((EXT), 0, sizeof (SCNHDR));                \
 333     }                                                   \
 334   while (0)
 335
 336 /* The line number and reloc overflow checking in coff_swap_scnhdr_out in
 337    coffswap.h doesn't use PUT_X for s_nlnno and s_nreloc.
 338    Due to different sized v0/v1/v2 section headers, we have to re-write these
 339    fields.
 340  */
 341 #define COFF_ADJUST_SCNHDR_OUT_POST(ABFD, INT, EXT) \
 342   do                                                                       \
 343     {                                                                      \
 344       PUT_SCNHDR_NLNNO (ABFD, ((struct internal_scnhdr *)(INT))->s_nlnno,  \
 345                         ((SCNHDR *)(EXT))->s_nlnno);                       \
 346       PUT_SCNHDR_NRELOC (ABFD, ((struct internal_scnhdr *)(INT))->s_nreloc,\
 347                          ((SCNHDR *)(EXT))->s_nreloc);                     \
 348       PUT_SCNHDR_FLAGS (ABFD, ((struct internal_scnhdr *)(INT))->s_flags,  \
 349                         ((SCNHDR *)(EXT))->s_flags);                       \
 350       PUT_SCNHDR_PAGE (ABFD, ((struct internal_scnhdr *)(INT))->s_page,    \
 351                        ((SCNHDR *)(EXT))->s_page);                         \
 352     }                                                                      \
 353    while (0)
 354
 355 /*
 356  * names of "special" sections
 357  */
 358 #define _TEXT   ".text"
 359 #define _DATA   ".data"
 360 #define _BSS    ".bss"
 361 #define _CINIT  ".cinit"            /* initialized C data */
 362 #define _SCONST  ".const"           /* constants */
 363 #define _SWITCH ".switch"           /* switch tables */
 364 #define _STACK  ".stack"            /* C stack */
 365 #define _SYSMEM ".sysmem"           /* used for malloc et al. syscalls */
 366
 367 /********************** LINE NUMBERS **********************/
 368
 369 /* 1 line number entry for every "breakpointable" source line in a section.
 370  * Line numbers are grouped on a per function basis; first entry in a function
 371  * grouping will have l_lnno = 0 and in place of physical address will be the
 372  * symbol table index of the function name.
 373  */
 374 struct external_lineno {
 375   union {
 376     char l_symndx[4];   /* function name symbol index, iff l_lnno == 0*/
 377     char l_paddr[4];    /* (physical) address of line number    */
 378   } l_addr;
 379   char l_lnno[2];       /* line number          */
 380 };
 381
 382 #define LINENO  struct external_lineno
 383 #define LINESZ  6
 384
 385
 386 /********************** SYMBOLS **********************/
 387
 388 /* NOTE: this is what a local label looks like in assembly source; what it
 389    looks like in COFF output is undefined */
 390 #define TICOFF_LOCAL_LABEL_P(NAME) \
 391 ((NAME[0] == '$' && NAME[1] >= '0' && NAME[1] <= '9' && NAME[2] == '\0') \
 392  || NAME[strlen(NAME)-1] == '?')
 393
 394 #define E_SYMNMLEN      8       /* # characters in a symbol name        */
 395 #define E_FILNMLEN      14      /* # characters in a file name          */
 396 #define E_DIMNUM        4       /* # array dimensions in auxiliary entry */
 397
 398 struct external_syment
 399 {
 400   union {
 401     char e_name[E_SYMNMLEN];
 402     struct {
 403       char e_zeroes[4];
 404       char e_offset[4];
 405     } e;
 406   } e;
 407   char e_value[4];
 408   char e_scnum[2];
 409   char e_type[2];
 410   char e_sclass[1];
 411   char e_numaux[1];
 412 };
 413
 414
 415 #define N_BTMASK        (017)
 416 #define N_TMASK         (060)
 417 #define N_BTSHFT        (4)
 418 #define N_TSHIFT        (2)
 419
 420
 421 union external_auxent {
 422   struct {
 423         char x_tagndx[4];       /* str, un, or enum tag indx */
 424         union {
 425           struct {
 426                 char  x_lnno[2]; /* declaration line number */
 427                 char  x_size[2]; /* str/union/array size */
 428           } x_lnsz;
 429           char x_fsize[4];      /* size of function */
 430         } x_misc;
 431         union {
 432           struct {              /* if ISFCN, tag, or .bb */
 433                 char x_lnnoptr[4];      /* ptr to fcn line # */
 434                 char x_endndx[4];       /* entry ndx past block end */
 435           } x_fcn;
 436           struct {              /* if ISARY, up to 4 dimen. */
 437                 char x_dimen[E_DIMNUM][2];
 438           } x_ary;
 439         } x_fcnary;
 440         char x_tvndx[2];                /* tv index */
 441   } x_sym;
 442
 443   union {
 444         char x_fname[E_FILNMLEN];
 445         struct {
 446           char x_zeroes[4];
 447           char x_offset[4];
 448         } x_n;
 449   } x_file;
 450
 451   struct {
 452         char x_scnlen[4];                       /* section length */
 453         char x_nreloc[2];       /* # relocation entries */
 454         char x_nlinno[2];       /* # line numbers */
 455   } x_scn;
 456
 457   struct {
 458         char x_tvfill[4];       /* tv fill value */
 459         char x_tvlen[2];        /* length of .tv */
 460         char x_tvran[2][2];     /* tv range */
 461   } x_tv;               /* info about .tv section (in auxent of symbol .tv)) */
 462
 463
 464 };
 465
 466 #define SYMENT  struct external_syment
 467 #define SYMESZ  18
 468 #define AUXENT  union external_auxent
 469 #define AUXESZ  18
 470
 471 /* section lengths are in target bytes (not host bytes) */
 472 #define GET_SCN_SCNLEN(ABFD, EXT) \
 473   (H_GET_32 (ABFD, (EXT)->x_scn.x_scnlen) * bfd_octets_per_byte (ABFD))
 474 #define PUT_SCN_SCNLEN(ABFD, INT, EXT) \
 475   H_PUT_32 (ABFD, (INT) / bfd_octets_per_byte (ABFD), (EXT)->x_scn.x_scnlen)
 476
 477 /* lnsz size is in bits in COFF file, in bytes in BFD */
 478 #define GET_LNSZ_SIZE(abfd, ext) \
 479  (H_GET_16 (abfd, ext->x_sym.x_misc.x_lnsz.x_size) / (class != C_FIELD ? 8 : 1))
 480
 481 #define PUT_LNSZ_SIZE(abfd, in, ext) \
 482   H_PUT_16 (abfd, ((class != C_FIELD) ? (in) * 8 : (in)), \
 483            ext->x_sym.x_misc.x_lnsz.x_size)
 484
 485 /* TI COFF stores offsets for MOS and MOU in bits; BFD expects bytes
 486    Also put the load page flag of the section into the symbol value if it's an
 487    address.  */
 488 #ifndef NEEDS_PAGE
 489 #define NEEDS_PAGE(X) 0
 490 #define PAGE_MASK 0
 491 #endif
 492 #define COFF_ADJUST_SYM_IN_POST(ABFD, EXT, INT) \
 493   do                                                                    \
 494     {                                                                   \
 495       struct internal_syment *dst = (struct internal_syment *)(INT);    \
 496       if (dst->n_sclass == C_MOS || dst->n_sclass == C_MOU)             \
 497         dst->n_value /= 8;                                              \
 498       else if (NEEDS_PAGE (dst->n_sclass)) {                            \
 499         asection *scn = coff_section_from_bfd_index (abfd, dst->n_scnum); \
 500         dst->n_value |= (scn->lma & PAGE_MASK);                         \
 501       }                                                                 \
 502     }                                                                   \
 503    while (0)
 504
 505 #define COFF_ADJUST_SYM_OUT_POST(ABFD, INT, EXT) \
 506   do                                                                    \
 507     {                                                                   \
 508        struct internal_syment *src = (struct internal_syment *)(INT);   \
 509        SYMENT *dst = (SYMENT *)(EXT);                                   \
 510        if (src->n_sclass == C_MOU || src->n_sclass == C_MOS)            \
 511          H_PUT_32 (abfd, src->n_value * 8, dst->e_value);               \
 512        else if (NEEDS_PAGE (src->n_sclass)) {                           \
 513          H_PUT_32 (abfd, src->n_value &= ~PAGE_MASK, dst->e_value);     \
 514        }                                                                \
 515     }                                                                   \
 516    while (0)
 517
 518 /* Detect section-relative absolute symbols so they get flagged with a sym
 519    index of -1.
 520 */
 521 #define SECTION_RELATIVE_ABSOLUTE_SYMBOL_P(RELOC, SECT) \
 522   ((*(RELOC)->sym_ptr_ptr)->section->output_section == (SECT) \
 523    && (RELOC)->howto->name[0] == 'A')
 524
 525 /********************** RELOCATION DIRECTIVES **********************/
 526
 527 struct external_reloc_v0
 528 {
 529   char r_vaddr[4];
 530   char r_symndx[2];
 531   char r_reserved[2];
 532   char r_type[2];
 533 };
 534
 535 struct external_reloc
 536 {
 537   char r_vaddr[4];
 538   char r_symndx[4];
 539   char r_reserved[2]; /* extended pmad byte for COFF2 */
 540   char r_type[2];
 541 };
 542
 543 #define RELOC struct external_reloc
 544 #define RELSZ_V0 10                 /* FIXME -- coffcode.h needs fixing */
 545 #define RELSZ 12                    /* for COFF1/2 */
 546
 547 /* various relocation types.  */
 548 #define R_ABS     0x0000            /* no relocation */
 549 #define R_REL13   0x002A            /* 13-bit direct reference (???) */
 550 #define R_PARTLS7 0x0028            /* 7 LSBs of an address */
 551 #define R_PARTMS9 0x0029            /* 9MSBs of an address */
 552 #define R_EXTWORD 0x002B            /* 23-bit direct reference */
 553 #define R_EXTWORD16 0x002C          /* 16-bit direct reference to 23-bit addr*/
 554 #define R_EXTWORDMS7 0x002D         /* upper 7 bits of 23-bit address */
 555
 556 #endif /* COFF_TI_H */