include/coff/alpha.h

   1 /* ECOFF support on Alpha machines.
   2    coff/ecoff.h must be included before this file.
   3
   4    Copyright (C) 2001-2023 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 3 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., 51 Franklin Street - Fifth Floor, Boston,
  19    MA 02110-1301, USA.  */
  20
  21 /********************** FILE HEADER **********************/
  22
  23 struct external_filehdr
  24 {
  25   unsigned char f_magic[2];     /* magic number                 */
  26   unsigned char f_nscns[2];     /* number of sections           */
  27   unsigned char f_timdat[4];    /* time & date stamp            */
  28   unsigned char f_symptr[8];    /* file pointer to symtab       */
  29   unsigned char f_nsyms[4];     /* number of symtab entries     */
  30   unsigned char f_opthdr[2];    /* sizeof(optional hdr)         */
  31   unsigned char f_flags[2];     /* flags                        */
  32 };
  33
  34 /* Magic numbers are defined in coff/ecoff.h.  */
  35 #define ALPHA_ECOFF_BADMAG(x) \
  36   ((x).f_magic != ALPHA_MAGIC && (x).f_magic != ALPHA_MAGIC_BSD)
  37
  38 #define ALPHA_ECOFF_COMPRESSEDMAG(x) \
  39   ((x).f_magic == ALPHA_MAGIC_COMPRESSED)
  40
  41 /* The object type is encoded in the f_flags.  */
  42 #define F_ALPHA_OBJECT_TYPE_MASK        0x3000
  43 #define F_ALPHA_NO_SHARED               0x1000
  44 #define F_ALPHA_SHARABLE                0x2000
  45 #define F_ALPHA_CALL_SHARED             0x3000
  46
  47 #define FILHDR  struct external_filehdr
  48 #define FILHSZ  24
  49
  50 /********************** AOUT "OPTIONAL HEADER" **********************/
  51
  52 typedef struct external_aouthdr
  53 {
  54   unsigned char magic[2];       /* type of file                         */
  55   unsigned char vstamp[2];      /* version stamp                        */
  56   unsigned char bldrev[2];      /* ?? */
  57   unsigned char padding[2];     /* pad to quadword boundary             */
  58   unsigned char tsize[8];       /* text size in bytes                   */
  59   unsigned char dsize[8];       /* initialized data "  "                */
  60   unsigned char bsize[8];       /* uninitialized data "   "             */
  61   unsigned char entry[8];       /* entry pt.                            */
  62   unsigned char text_start[8];  /* base of text used for this file */
  63   unsigned char data_start[8];  /* base of data used for this file */
  64   unsigned char bss_start[8];   /* base of bss used for this file */
  65   unsigned char gprmask[4];     /* bitmask of general registers used */
  66   unsigned char fprmask[4];     /* bitmask of floating point registers used */
  67   unsigned char gp_value[8];    /* value for gp register */
  68 } AOUTHDR;
  69
  70 /* compute size of a header */
  71
  72 #define AOUTSZ 80
  73 #define AOUTHDRSZ 80
  74
  75 /********************** SECTION HEADER **********************/
  76
  77 struct external_scnhdr
  78 {
  79   unsigned char s_name[8];      /* section name                 */
  80   unsigned char s_paddr[8];     /* physical address, aliased s_nlib */
  81   unsigned char s_vaddr[8];     /* virtual address              */
  82   unsigned char s_size[8];      /* section size                 */
  83   unsigned char s_scnptr[8];    /* file ptr to raw data for section */
  84   unsigned char s_relptr[8];    /* file ptr to relocation       */
  85   unsigned char s_lnnoptr[8];   /* file ptr to line numbers     */
  86   unsigned char s_nreloc[2];    /* number of relocation entries */
  87   unsigned char s_nlnno[2];     /* number of line number entries*/
  88   unsigned char s_flags[4];     /* flags                        */
  89 };
  90
  91 #define SCNHDR  struct external_scnhdr
  92 #define SCNHSZ  64
  93
  94 /********************** RELOCATION DIRECTIVES **********************/
  95
  96 struct external_reloc
  97 {
  98   unsigned char r_vaddr[8];
  99   unsigned char r_symndx[4];
 100   unsigned char r_bits[4];
 101 };
 102
 103 #define RELOC struct external_reloc
 104 #define RELSZ 16
 105
 106 /* Constants to unpack the r_bits field.  The Alpha seems to always be
 107    little endian, so I haven't bothered to define big endian variants
 108    of these.  */
 109
 110 #define RELOC_BITS0_TYPE_LITTLE                 0xff
 111 #define RELOC_BITS0_TYPE_SH_LITTLE              0
 112
 113 #define RELOC_BITS1_EXTERN_LITTLE               0x01
 114
 115 #define RELOC_BITS1_OFFSET_LITTLE               0x7e
 116 #define RELOC_BITS1_OFFSET_SH_LITTLE            1
 117
 118 #define RELOC_BITS1_RESERVED_LITTLE             0x80
 119 #define RELOC_BITS1_RESERVED_SH_LITTLE          7
 120 #define RELOC_BITS2_RESERVED_LITTLE             0xff
 121 #define RELOC_BITS2_RESERVED_SH_LEFT_LITTLE     1
 122 #define RELOC_BITS3_RESERVED_LITTLE             0x03
 123 #define RELOC_BITS3_RESERVED_SH_LEFT_LITTLE     9
 124
 125 #define RELOC_BITS3_SIZE_LITTLE                 0xfc
 126 #define RELOC_BITS3_SIZE_SH_LITTLE              2
 127
 128 /* The r_type field in a reloc is one of the following values.  */
 129 #define ALPHA_R_IGNORE          0
 130 #define ALPHA_R_REFLONG         1
 131 #define ALPHA_R_REFQUAD         2
 132 #define ALPHA_R_GPREL32         3
 133 #define ALPHA_R_LITERAL         4
 134 #define ALPHA_R_LITUSE          5
 135 #define ALPHA_R_GPDISP          6
 136 #define ALPHA_R_BRADDR          7
 137 #define ALPHA_R_HINT            8
 138 #define ALPHA_R_SREL16          9
 139 #define ALPHA_R_SREL32         10
 140 #define ALPHA_R_SREL64         11
 141 #define ALPHA_R_OP_PUSH        12
 142 #define ALPHA_R_OP_STORE       13
 143 #define ALPHA_R_OP_PSUB        14
 144 #define ALPHA_R_OP_PRSHIFT     15
 145 #define ALPHA_R_GPVALUE        16
 146 #define ALPHA_R_GPRELHIGH      17
 147 #define ALPHA_R_GPRELLOW       18
 148 #define ALPHA_R_IMMED          19
 149
 150 /* Overloaded reloc value used by Net- and OpenBSD.  */
 151 #define ALPHA_R_LITERALSLEAZY  17
 152
 153 /* With ALPHA_R_LITUSE, the r_size field is one of the following values.  */
 154 #define ALPHA_R_LU_BASE         1
 155 #define ALPHA_R_LU_BYTOFF       2
 156 #define ALPHA_R_LU_JSR          3
 157
 158 /* With ALPHA_R_IMMED, the r_size field is one of the following values.  */
 159 #define ALPHA_R_IMMED_GP_16     1
 160 #define ALPHA_R_IMMED_GP_HI32   2
 161 #define ALPHA_R_IMMED_SCN_HI32  3
 162 #define ALPHA_R_IMMED_BR_HI32   4
 163 #define ALPHA_R_IMMED_LO32      5
 164
 165 /********************** SYMBOLIC INFORMATION **********************/
 166
 167 /* Written by John Gilmore.  */
 168
 169 /* ECOFF uses COFF-like section structures, but its own symbol format.
 170    This file defines the symbol format in fields whose size and alignment
 171    will not vary on different host systems.  */
 172
 173 /* File header as a set of bytes */
 174
 175 struct hdr_ext
 176 {
 177         unsigned char   h_magic[2];
 178         unsigned char   h_vstamp[2];
 179         unsigned char   h_ilineMax[4];
 180         unsigned char   h_idnMax[4];
 181         unsigned char   h_ipdMax[4];
 182         unsigned char   h_isymMax[4];
 183         unsigned char   h_ioptMax[4];
 184         unsigned char   h_iauxMax[4];
 185         unsigned char   h_issMax[4];
 186         unsigned char   h_issExtMax[4];
 187         unsigned char   h_ifdMax[4];
 188         unsigned char   h_crfd[4];
 189         unsigned char   h_iextMax[4];
 190         unsigned char   h_cbLine[8];
 191         unsigned char   h_cbLineOffset[8];
 192         unsigned char   h_cbDnOffset[8];
 193         unsigned char   h_cbPdOffset[8];
 194         unsigned char   h_cbSymOffset[8];
 195         unsigned char   h_cbOptOffset[8];
 196         unsigned char   h_cbAuxOffset[8];
 197         unsigned char   h_cbSsOffset[8];
 198         unsigned char   h_cbSsExtOffset[8];
 199         unsigned char   h_cbFdOffset[8];
 200         unsigned char   h_cbRfdOffset[8];
 201         unsigned char   h_cbExtOffset[8];
 202 };
 203
 204 /* File descriptor external record */
 205
 206 struct fdr_ext
 207 {
 208         unsigned char   f_adr[8];
 209         unsigned char   f_cbLineOffset[8];
 210         unsigned char   f_cbLine[8];
 211         unsigned char   f_cbSs[8];
 212         unsigned char   f_rss[4];
 213         unsigned char   f_issBase[4];
 214         unsigned char   f_isymBase[4];
 215         unsigned char   f_csym[4];
 216         unsigned char   f_ilineBase[4];
 217         unsigned char   f_cline[4];
 218         unsigned char   f_ioptBase[4];
 219         unsigned char   f_copt[4];
 220         unsigned char   f_ipdFirst[4];
 221         unsigned char   f_cpd[4];
 222         unsigned char   f_iauxBase[4];
 223         unsigned char   f_caux[4];
 224         unsigned char   f_rfdBase[4];
 225         unsigned char   f_crfd[4];
 226         unsigned char   f_bits1[1];
 227         unsigned char   f_bits2[3];
 228         unsigned char   f_padding[4];
 229 };
 230
 231 #define FDR_BITS1_LANG_BIG              0xF8
 232 #define FDR_BITS1_LANG_SH_BIG           3
 233 #define FDR_BITS1_LANG_LITTLE           0x1F
 234 #define FDR_BITS1_LANG_SH_LITTLE        0
 235
 236 #define FDR_BITS1_FMERGE_BIG            0x04
 237 #define FDR_BITS1_FMERGE_LITTLE         0x20
 238
 239 #define FDR_BITS1_FREADIN_BIG           0x02
 240 #define FDR_BITS1_FREADIN_LITTLE        0x40
 241
 242 #define FDR_BITS1_FBIGENDIAN_BIG        0x01
 243 #define FDR_BITS1_FBIGENDIAN_LITTLE     0x80
 244
 245 #define FDR_BITS2_GLEVEL_BIG            0xC0
 246 #define FDR_BITS2_GLEVEL_SH_BIG         6
 247 #define FDR_BITS2_GLEVEL_LITTLE         0x03
 248 #define FDR_BITS2_GLEVEL_SH_LITTLE      0
 249
 250 /* We ignore the `reserved' field in bits2. */
 251
 252 /* Procedure descriptor external record */
 253
 254 struct pdr_ext {
 255         unsigned char   p_adr[8];
 256         unsigned char   p_cbLineOffset[8];
 257         unsigned char   p_isym[4];
 258         unsigned char   p_iline[4];
 259         unsigned char   p_regmask[4];
 260         unsigned char   p_regoffset[4];
 261         unsigned char   p_iopt[4];
 262         unsigned char   p_fregmask[4];
 263         unsigned char   p_fregoffset[4];
 264         unsigned char   p_frameoffset[4];
 265         unsigned char   p_lnLow[4];
 266         unsigned char   p_lnHigh[4];
 267         unsigned char   p_gp_prologue[1];
 268         unsigned char   p_bits1[1];
 269         unsigned char   p_bits2[1];
 270         unsigned char   p_localoff[1];
 271         unsigned char   p_framereg[2];
 272         unsigned char   p_pcreg[2];
 273 };
 274
 275 #define PDR_BITS1_GP_USED_BIG           0x80
 276 #define PDR_BITS1_REG_FRAME_BIG         0x40
 277 #define PDR_BITS1_PROF_BIG              0x20
 278 #define PDR_BITS1_RESERVED_BIG          0x1f
 279 #define PDR_BITS1_RESERVED_SH_LEFT_BIG  8
 280 #define PDR_BITS2_RESERVED_BIG          0xff
 281 #define PDR_BITS2_RESERVED_SH_BIG       0
 282
 283 #define PDR_BITS1_GP_USED_LITTLE        0x01
 284 #define PDR_BITS1_REG_FRAME_LITTLE      0x02
 285 #define PDR_BITS1_PROF_LITTLE           0x04
 286 #define PDR_BITS1_RESERVED_LITTLE       0xf8
 287 #define PDR_BITS1_RESERVED_SH_LITTLE    3
 288 #define PDR_BITS2_RESERVED_LITTLE       0xff
 289 #define PDR_BITS2_RESERVED_SH_LEFT_LITTLE 5
 290
 291 /* Line numbers */
 292
 293 struct line_ext {
 294         unsigned char   l_line[4];
 295 };
 296
 297 /* Symbol external record */
 298
 299 struct sym_ext {
 300         unsigned char   s_value[8];
 301         unsigned char   s_iss[4];
 302         unsigned char   s_bits1[1];
 303         unsigned char   s_bits2[1];
 304         unsigned char   s_bits3[1];
 305         unsigned char   s_bits4[1];
 306 };
 307
 308 #define SYM_BITS1_ST_BIG                0xFC
 309 #define SYM_BITS1_ST_SH_BIG             2
 310 #define SYM_BITS1_ST_LITTLE             0x3F
 311 #define SYM_BITS1_ST_SH_LITTLE          0
 312
 313 #define SYM_BITS1_SC_BIG                0x03
 314 #define SYM_BITS1_SC_SH_LEFT_BIG        3
 315 #define SYM_BITS1_SC_LITTLE             0xC0
 316 #define SYM_BITS1_SC_SH_LITTLE          6
 317
 318 #define SYM_BITS2_SC_BIG                0xE0
 319 #define SYM_BITS2_SC_SH_BIG             5
 320 #define SYM_BITS2_SC_LITTLE             0x07
 321 #define SYM_BITS2_SC_SH_LEFT_LITTLE     2
 322
 323 #define SYM_BITS2_RESERVED_BIG          0x10
 324 #define SYM_BITS2_RESERVED_LITTLE       0x08
 325
 326 #define SYM_BITS2_INDEX_BIG             0x0F
 327 #define SYM_BITS2_INDEX_SH_LEFT_BIG     16
 328 #define SYM_BITS2_INDEX_LITTLE          0xF0
 329 #define SYM_BITS2_INDEX_SH_LITTLE       4
 330
 331 #define SYM_BITS3_INDEX_SH_LEFT_BIG     8
 332 #define SYM_BITS3_INDEX_SH_LEFT_LITTLE  4
 333
 334 #define SYM_BITS4_INDEX_SH_LEFT_BIG     0
 335 #define SYM_BITS4_INDEX_SH_LEFT_LITTLE  12
 336
 337 /* External symbol external record */
 338
 339 struct ext_ext {
 340         struct  sym_ext es_asym;
 341         unsigned char   es_bits1[1];
 342         unsigned char   es_bits2[3];
 343         unsigned char   es_ifd[4];
 344 };
 345
 346 #define EXT_BITS1_JMPTBL_BIG            0x80
 347 #define EXT_BITS1_JMPTBL_LITTLE         0x01
 348
 349 #define EXT_BITS1_COBOL_MAIN_BIG        0x40
 350 #define EXT_BITS1_COBOL_MAIN_LITTLE     0x02
 351
 352 #define EXT_BITS1_WEAKEXT_BIG           0x20
 353 #define EXT_BITS1_WEAKEXT_LITTLE        0x04
 354
 355 /* Dense numbers external record */
 356
 357 struct dnr_ext {
 358         unsigned char   d_rfd[4];
 359         unsigned char   d_index[4];
 360 };
 361
 362 /* Relative file descriptor */
 363
 364 struct rfd_ext {
 365   unsigned char rfd[4];
 366 };
 367
 368 /* Optimizer symbol external record */
 369
 370 struct opt_ext {
 371   unsigned char o_bits1[1];
 372   unsigned char o_bits2[1];
 373   unsigned char o_bits3[1];
 374   unsigned char o_bits4[1];
 375   struct rndx_ext o_rndx;
 376   unsigned char o_offset[4];
 377 };
 378
 379 #define OPT_BITS2_VALUE_SH_LEFT_BIG     16
 380 #define OPT_BITS2_VALUE_SH_LEFT_LITTLE  0
 381
 382 #define OPT_BITS3_VALUE_SH_LEFT_BIG     8
 383 #define OPT_BITS3_VALUE_SH_LEFT_LITTLE  8
 384
 385 #define OPT_BITS4_VALUE_SH_LEFT_BIG     0
 386 #define OPT_BITS4_VALUE_SH_LEFT_LITTLE  16