include/coff/alpha.h

   1 /* ECOFF support on Alpha machines.
   2    coff/ecoff.h must be included before this file.
   3
   4    Copyright 2001 Free Software Foundation, Inc.
   5
   6    This program 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 of the License, or
   9    (at your option) any later version.
  10
  11    This program 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 this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 /********************** FILE HEADER **********************/
  21
  22 struct external_filehdr
  23 {
  24   unsigned char f_magic[2];     /* magic number                 */
  25   unsigned char f_nscns[2];     /* number of sections           */
  26   unsigned char f_timdat[4];    /* time & date stamp            */
  27   unsigned char f_symptr[8];    /* file pointer to symtab       */
  28   unsigned char f_nsyms[4];     /* number of symtab entries     */
  29   unsigned char f_opthdr[2];    /* sizeof(optional hdr)         */
  30   unsigned char f_flags[2];     /* flags                        */
  31 };
  32
  33 /* Magic numbers are defined in coff/ecoff.h.  */
  34 #define ALPHA_ECOFF_BADMAG(x) \
  35   ((x).f_magic != ALPHA_MAGIC && (x).f_magic != ALPHA_MAGIC_BSD)
  36
  37 /* The object type is encoded in the f_flags.  */
  38 #define F_ALPHA_OBJECT_TYPE_MASK        0x3000
  39 #define F_ALPHA_NO_SHARED               0x1000
  40 #define F_ALPHA_SHARABLE                0x2000
  41 #define F_ALPHA_CALL_SHARED             0x3000
  42
  43 #define FILHDR  struct external_filehdr
  44 #define FILHSZ  24
  45
  46 /********************** AOUT "OPTIONAL HEADER" **********************/
  47
  48 typedef struct external_aouthdr
  49 {
  50   unsigned char magic[2];       /* type of file                         */
  51   unsigned char vstamp[2];      /* version stamp                        */
  52   unsigned char bldrev[2];      /* ?? */
  53   unsigned char padding[2];     /* pad to quadword boundary             */
  54   unsigned char tsize[8];       /* text size in bytes                   */
  55   unsigned char dsize[8];       /* initialized data "  "                */
  56   unsigned char bsize[8];       /* uninitialized data "   "             */
  57   unsigned char entry[8];       /* entry pt.                            */
  58   unsigned char text_start[8];  /* base of text used for this file */
  59   unsigned char data_start[8];  /* base of data used for this file */
  60   unsigned char bss_start[8];   /* base of bss used for this file */
  61   unsigned char gprmask[4];     /* bitmask of general registers used */
  62   unsigned char fprmask[4];     /* bitmask of floating point registers used */
  63   unsigned char gp_value[8];    /* value for gp register */
  64 } AOUTHDR;
  65
  66 /* compute size of a header */
  67
  68 #define AOUTSZ 80
  69 #define AOUTHDRSZ 80
  70
  71 /********************** SECTION HEADER **********************/
  72
  73 struct external_scnhdr
  74 {
  75   unsigned char s_name[8];      /* section name                 */
  76   unsigned char s_paddr[8];     /* physical address, aliased s_nlib */
  77   unsigned char s_vaddr[8];     /* virtual address              */
  78   unsigned char s_size[8];      /* section size                 */
  79   unsigned char s_scnptr[8];    /* file ptr to raw data for section */
  80   unsigned char s_relptr[8];    /* file ptr to relocation       */
  81   unsigned char s_lnnoptr[8];   /* file ptr to line numbers     */
  82   unsigned char s_nreloc[2];    /* number of relocation entries */
  83   unsigned char s_nlnno[2];     /* number of line number entries*/
  84   unsigned char s_flags[4];     /* flags                        */
  85 };
  86
  87 #define SCNHDR  struct external_scnhdr
  88 #define SCNHSZ  64
  89
  90 /********************** RELOCATION DIRECTIVES **********************/
  91
  92 struct external_reloc
  93 {
  94   unsigned char r_vaddr[8];
  95   unsigned char r_symndx[4];
  96   unsigned char r_bits[4];
  97 };
  98
  99 #define RELOC struct external_reloc
 100 #define RELSZ 16
 101
 102 /* Constants to unpack the r_bits field.  The Alpha seems to always be
 103    little endian, so I haven't bothered to define big endian variants
 104    of these.  */
 105
 106 #define RELOC_BITS0_TYPE_LITTLE                 0xff
 107 #define RELOC_BITS0_TYPE_SH_LITTLE              0
 108
 109 #define RELOC_BITS1_EXTERN_LITTLE               0x01
 110
 111 #define RELOC_BITS1_OFFSET_LITTLE               0x7e
 112 #define RELOC_BITS1_OFFSET_SH_LITTLE            1
 113
 114 #define RELOC_BITS1_RESERVED_LITTLE             0x80
 115 #define RELOC_BITS1_RESERVED_SH_LITTLE          7
 116 #define RELOC_BITS2_RESERVED_LITTLE             0xff
 117 #define RELOC_BITS2_RESERVED_SH_LEFT_LITTLE     1
 118 #define RELOC_BITS3_RESERVED_LITTLE             0x03
 119 #define RELOC_BITS3_RESERVED_SH_LEFT_LITTLE     9
 120
 121 #define RELOC_BITS3_SIZE_LITTLE                 0xfc
 122 #define RELOC_BITS3_SIZE_SH_LITTLE              2
 123
 124 /* The r_type field in a reloc is one of the following values.  */
 125 #define ALPHA_R_IGNORE          0
 126 #define ALPHA_R_REFLONG         1
 127 #define ALPHA_R_REFQUAD         2
 128 #define ALPHA_R_GPREL32         3
 129 #define ALPHA_R_LITERAL         4
 130 #define ALPHA_R_LITUSE          5
 131 #define ALPHA_R_GPDISP          6
 132 #define ALPHA_R_BRADDR          7
 133 #define ALPHA_R_HINT            8
 134 #define ALPHA_R_SREL16          9
 135 #define ALPHA_R_SREL32         10
 136 #define ALPHA_R_SREL64         11
 137 #define ALPHA_R_OP_PUSH        12
 138 #define ALPHA_R_OP_STORE       13
 139 #define ALPHA_R_OP_PSUB        14
 140 #define ALPHA_R_OP_PRSHIFT     15
 141 #define ALPHA_R_GPVALUE        16
 142 #define ALPHA_R_GPRELHIGH      17
 143 #define ALPHA_R_GPRELLOW       18
 144 #define ALPHA_R_IMMED          19
 145
 146 /* Overloaded reloc value used by Net- and OpenBSD.  */
 147 #define ALPHA_R_LITERALSLEAZY  17
 148
 149 /* With ALPHA_R_LITUSE, the r_size field is one of the following values.  */
 150 #define ALPHA_R_LU_BASE         1
 151 #define ALPHA_R_LU_BYTOFF       2
 152 #define ALPHA_R_LU_JSR          3
 153
 154 /* With ALPHA_R_IMMED, the r_size field is one of the following values.  */
 155 #define ALPHA_R_IMMED_GP_16     1
 156 #define ALPHA_R_IMMED_GP_HI32   2
 157 #define ALPHA_R_IMMED_SCN_HI32  3
 158 #define ALPHA_R_IMMED_BR_HI32   4
 159 #define ALPHA_R_IMMED_LO32      5
 160
 161 /********************** SYMBOLIC INFORMATION **********************/
 162
 163 /* Written by John Gilmore.  */
 164
 165 /* ECOFF uses COFF-like section structures, but its own symbol format.
 166    This file defines the symbol format in fields whose size and alignment
 167    will not vary on different host systems.  */
 168
 169 /* File header as a set of bytes */
 170
 171 struct hdr_ext
 172 {
 173         unsigned char   h_magic[2];
 174         unsigned char   h_vstamp[2];
 175         unsigned char   h_ilineMax[4];
 176         unsigned char   h_idnMax[4];
 177         unsigned char   h_ipdMax[4];
 178         unsigned char   h_isymMax[4];
 179         unsigned char   h_ioptMax[4];
 180         unsigned char   h_iauxMax[4];
 181         unsigned char   h_issMax[4];
 182         unsigned char   h_issExtMax[4];
 183         unsigned char   h_ifdMax[4];
 184         unsigned char   h_crfd[4];
 185         unsigned char   h_iextMax[4];
 186         unsigned char   h_cbLine[8];
 187         unsigned char   h_cbLineOffset[8];
 188         unsigned char   h_cbDnOffset[8];
 189         unsigned char   h_cbPdOffset[8];
 190         unsigned char   h_cbSymOffset[8];
 191         unsigned char   h_cbOptOffset[8];
 192         unsigned char   h_cbAuxOffset[8];
 193         unsigned char   h_cbSsOffset[8];
 194         unsigned char   h_cbSsExtOffset[8];
 195         unsigned char   h_cbFdOffset[8];
 196         unsigned char   h_cbRfdOffset[8];
 197         unsigned char   h_cbExtOffset[8];
 198 };
 199
 200 /* File descriptor external record */
 201
 202 struct fdr_ext
 203 {
 204         unsigned char   f_adr[8];
 205         unsigned char   f_cbLineOffset[8];
 206         unsigned char   f_cbLine[8];
 207         unsigned char   f_cbSs[8];
 208         unsigned char   f_rss[4];
 209         unsigned char   f_issBase[4];
 210         unsigned char   f_isymBase[4];
 211         unsigned char   f_csym[4];
 212         unsigned char   f_ilineBase[4];
 213         unsigned char   f_cline[4];
 214         unsigned char   f_ioptBase[4];
 215         unsigned char   f_copt[4];
 216         unsigned char   f_ipdFirst[4];
 217         unsigned char   f_cpd[4];
 218         unsigned char   f_iauxBase[4];
 219         unsigned char   f_caux[4];
 220         unsigned char   f_rfdBase[4];
 221         unsigned char   f_crfd[4];
 222         unsigned char   f_bits1[1];
 223         unsigned char   f_bits2[3];
 224         unsigned char   f_padding[4];
 225 };
 226
 227 #define FDR_BITS1_LANG_BIG              0xF8
 228 #define FDR_BITS1_LANG_SH_BIG           3
 229 #define FDR_BITS1_LANG_LITTLE           0x1F
 230 #define FDR_BITS1_LANG_SH_LITTLE        0
 231
 232 #define FDR_BITS1_FMERGE_BIG            0x04
 233 #define FDR_BITS1_FMERGE_LITTLE         0x20
 234
 235 #define FDR_BITS1_FREADIN_BIG           0x02
 236 #define FDR_BITS1_FREADIN_LITTLE        0x40
 237
 238 #define FDR_BITS1_FBIGENDIAN_BIG        0x01
 239 #define FDR_BITS1_FBIGENDIAN_LITTLE     0x80
 240
 241 #define FDR_BITS2_GLEVEL_BIG            0xC0
 242 #define FDR_BITS2_GLEVEL_SH_BIG         6
 243 #define FDR_BITS2_GLEVEL_LITTLE         0x03
 244 #define FDR_BITS2_GLEVEL_SH_LITTLE      0
 245
 246 /* We ignore the `reserved' field in bits2. */
 247
 248 /* Procedure descriptor external record */
 249
 250 struct pdr_ext {
 251         unsigned char   p_adr[8];
 252         unsigned char   p_cbLineOffset[8];
 253         unsigned char   p_isym[4];
 254         unsigned char   p_iline[4];
 255         unsigned char   p_regmask[4];
 256         unsigned char   p_regoffset[4];
 257         unsigned char   p_iopt[4];
 258         unsigned char   p_fregmask[4];
 259         unsigned char   p_fregoffset[4];
 260         unsigned char   p_frameoffset[4];
 261         unsigned char   p_lnLow[4];
 262         unsigned char   p_lnHigh[4];
 263         unsigned char   p_gp_prologue[1];
 264         unsigned char   p_bits1[1];
 265         unsigned char   p_bits2[1];
 266         unsigned char   p_localoff[1];
 267         unsigned char   p_framereg[2];
 268         unsigned char   p_pcreg[2];
 269 };
 270
 271 #define PDR_BITS1_GP_USED_BIG           0x80
 272 #define PDR_BITS1_REG_FRAME_BIG         0x40
 273 #define PDR_BITS1_PROF_BIG              0x20
 274 #define PDR_BITS1_RESERVED_BIG          0x1f
 275 #define PDR_BITS1_RESERVED_SH_LEFT_BIG  8
 276 #define PDR_BITS2_RESERVED_BIG          0xff
 277 #define PDR_BITS2_RESERVED_SH_BIG       0
 278
 279 #define PDR_BITS1_GP_USED_LITTLE        0x01
 280 #define PDR_BITS1_REG_FRAME_LITTLE      0x02
 281 #define PDR_BITS1_PROF_LITTLE           0x04
 282 #define PDR_BITS1_RESERVED_LITTLE       0xf8
 283 #define PDR_BITS1_RESERVED_SH_LITTLE    3
 284 #define PDR_BITS2_RESERVED_LITTLE       0xff
 285 #define PDR_BITS2_RESERVED_SH_LEFT_LITTLE 5
 286
 287 /* Line numbers */
 288
 289 struct line_ext {
 290         unsigned char   l_line[4];
 291 };
 292
 293 /* Symbol external record */
 294
 295 struct sym_ext {
 296         unsigned char   s_value[8];
 297         unsigned char   s_iss[4];
 298         unsigned char   s_bits1[1];
 299         unsigned char   s_bits2[1];
 300         unsigned char   s_bits3[1];
 301         unsigned char   s_bits4[1];
 302 };
 303
 304 #define SYM_BITS1_ST_BIG                0xFC
 305 #define SYM_BITS1_ST_SH_BIG             2
 306 #define SYM_BITS1_ST_LITTLE             0x3F
 307 #define SYM_BITS1_ST_SH_LITTLE          0
 308
 309 #define SYM_BITS1_SC_BIG                0x03
 310 #define SYM_BITS1_SC_SH_LEFT_BIG        3
 311 #define SYM_BITS1_SC_LITTLE             0xC0
 312 #define SYM_BITS1_SC_SH_LITTLE          6
 313
 314 #define SYM_BITS2_SC_BIG                0xE0
 315 #define SYM_BITS2_SC_SH_BIG             5
 316 #define SYM_BITS2_SC_LITTLE             0x07
 317 #define SYM_BITS2_SC_SH_LEFT_LITTLE     2
 318
 319 #define SYM_BITS2_RESERVED_BIG          0x10
 320 #define SYM_BITS2_RESERVED_LITTLE       0x08
 321
 322 #define SYM_BITS2_INDEX_BIG             0x0F
 323 #define SYM_BITS2_INDEX_SH_LEFT_BIG     16
 324 #define SYM_BITS2_INDEX_LITTLE          0xF0
 325 #define SYM_BITS2_INDEX_SH_LITTLE       4
 326
 327 #define SYM_BITS3_INDEX_SH_LEFT_BIG     8
 328 #define SYM_BITS3_INDEX_SH_LEFT_LITTLE  4
 329
 330 #define SYM_BITS4_INDEX_SH_LEFT_BIG     0
 331 #define SYM_BITS4_INDEX_SH_LEFT_LITTLE  12
 332
 333 /* External symbol external record */
 334
 335 struct ext_ext {
 336         struct  sym_ext es_asym;
 337         unsigned char   es_bits1[1];
 338         unsigned char   es_bits2[3];
 339         unsigned char   es_ifd[4];
 340 };
 341
 342 #define EXT_BITS1_JMPTBL_BIG            0x80
 343 #define EXT_BITS1_JMPTBL_LITTLE         0x01
 344
 345 #define EXT_BITS1_COBOL_MAIN_BIG        0x40
 346 #define EXT_BITS1_COBOL_MAIN_LITTLE     0x02
 347
 348 #define EXT_BITS1_WEAKEXT_BIG           0x20
 349 #define EXT_BITS1_WEAKEXT_LITTLE        0x04
 350
 351 /* Dense numbers external record */
 352
 353 struct dnr_ext {
 354         unsigned char   d_rfd[4];
 355         unsigned char   d_index[4];
 356 };
 357
 358 /* Relative file descriptor */
 359
 360 struct rfd_ext {
 361   unsigned char rfd[4];
 362 };
 363
 364 /* Optimizer symbol external record */
 365
 366 struct opt_ext {
 367   unsigned char o_bits1[1];
 368   unsigned char o_bits2[1];
 369   unsigned char o_bits3[1];
 370   unsigned char o_bits4[1];
 371   struct rndx_ext o_rndx;
 372   unsigned char o_offset[4];
 373 };
 374
 375 #define OPT_BITS2_VALUE_SH_LEFT_BIG     16
 376 #define OPT_BITS2_VALUE_SH_LEFT_LITTLE  0
 377
 378 #define OPT_BITS3_VALUE_SH_LEFT_BIG     8
 379 #define OPT_BITS3_VALUE_SH_LEFT_LITTLE  8
 380
 381 #define OPT_BITS4_VALUE_SH_LEFT_BIG     0
 382 #define OPT_BITS4_VALUE_SH_LEFT_LITTLE  16