include/vms/lbr.h

   1 /* Alpha VMS external format of Libraries.
   2
   3    Copyright 2010 Free Software Foundation, Inc.
   4    Written by Tristan Gingold <gingold@adacore.com>, AdaCore.
   5
   6    This file is part of BFD, the Binary File Descriptor library.
   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 3 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,
  21    MA 02110-1301, USA.  */
  22
  23 #ifndef _VMS_LBR_H
  24 #define _VMS_LBR_H
  25
  26 /* Libray HeaDer.  */
  27
  28 /* Magic numbers.  Should match the major version.  */
  29
  30 #define LHD_SANEID_DCX 319232342
  31 #define LHD_SANEID3 233579905
  32 #define LHD_SANEID6 233579911
  33
  34 /* Library type.  */
  35 #define LBR__C_TYP_UNK    0     /* Unknown / unspecified.  */
  36 #define LBR__C_TYP_OBJ    1     /* Vax object.  */
  37 #define LBR__C_TYP_MLB    2     /* Macro.  */
  38 #define LBR__C_TYP_HLP    3     /* Help.  */
  39 #define LBR__C_TYP_TXT    4     /* Text.  */
  40 #define LBR__C_TYP_SHSTB  5     /* Vax shareable image.  */
  41 #define LBR__C_TYP_NCS    6     /* NCS.  */
  42 #define LBR__C_TYP_EOBJ   7     /* Alpha object.  */
  43 #define LBR__C_TYP_ESHSTB 8     /* Alpha shareable image.  */
  44 #define LBR__C_TYP_IOBJ   9     /* IA-64 object.  */
  45 #define LBR__C_TYP_ISHSTB 10    /* IA-64 shareable image.  */
  46
  47 struct vms_lhd
  48 {
  49   /* Type of the library.  See above.  */
  50   unsigned char type;
  51
  52   /* Number of indexes.  Generally 1, 2 for object libraries.  */
  53   unsigned char nindex;
  54
  55   unsigned char fill_1[2];
  56
  57   /* Sanity Id.  */
  58   unsigned char sanity[4];
  59
  60   /* Version.  */
  61   unsigned char majorid[2];
  62   unsigned char minorid[2];
  63
  64   /* Tool name.  */
  65   unsigned char lbrver[32];
  66
  67   /* Create time.  */
  68   unsigned char credat[8];
  69
  70   /* Update time.  */
  71   unsigned char updtim[8];
  72
  73   /* Size of the MHD.  */
  74   unsigned char mhdusz;
  75
  76   unsigned char idxblkf[2];     /* Unused.  */
  77   unsigned char fill_2;
  78   unsigned char closerror[2];
  79
  80   unsigned char spareword[2];
  81
  82   /* First free block, and number of free blocks.  */
  83   unsigned char freevbn[4];
  84   unsigned char freeblk[4];
  85
  86   unsigned char nextrfa[6];
  87   unsigned char nextvbn[4];
  88
  89   /* Free pre-allocated index block.  */
  90   unsigned char freidxblk[4];
  91   unsigned char freeidx[4];
  92
  93   /* Highest pre-allocated index block and in use.  */
  94   unsigned char hipreal[4];
  95   unsigned char hiprusd[4];
  96
  97   /* Number of index blocks in use.  */
  98   unsigned char idxblks[4];
  99
 100   /* Number of index entries.  */
 101   unsigned char idxcnt[4];
 102
 103   /* Number of modules entries.  */
 104   unsigned char modcnt[4];
 105
 106   unsigned char fill_3[2];
 107
 108   /* Number of module headers.  */
 109   unsigned char modhdrs[4];
 110
 111   /* Overhead index pointers.  */
 112   unsigned char idxovh[4];
 113
 114   /* Update history records.  */
 115   unsigned char maxluhrec[2];
 116   unsigned char numluhrec[2];
 117   unsigned char begluhrfa[6];
 118   unsigned char endluhrfa[6];
 119
 120   /* DCX map.  */
 121   unsigned char dcxmapvbn[4];
 122
 123   unsigned char fill_4[4 * 13];
 124 };
 125
 126 /* Known major ids.  */
 127 #define LBR_MAJORID 3           /* Alpha libraries.  */
 128 #define LBR_ELFMAJORID 6        /* Elf libraries (new index, new data).  */
 129
 130 /* Offset of the first IDD.  */
 131 #define LHD_IDXDESC 196
 132
 133 /* InDex Description.  */
 134 struct vms_idd
 135 {
 136   unsigned char flags[2];
 137
 138   /* Max length of the key.  */
 139   unsigned char keylen[2];
 140
 141   /* First index block.  */
 142   unsigned char vbn[4];
 143 };
 144
 145 /* IDD flags.  */
 146 #define IDD__FLAGS_ASCII 1
 147 #define IDD__FLAGS_LOCKED 2
 148 #define IDD__FLAGS_VARLENIDX 4
 149 #define IDD__FLAGS_NOCASECMP 8
 150 #define IDD__FLAGS_NOCASENTR 16
 151 #define IDD__FLAGS_UPCASNTRY 32
 152
 153 #define IDD_LENGTH 8
 154
 155 /* Index block.  */
 156 #define INDEXDEF__LENGTH 512
 157 #define INDEXDEF__BLKSIZ 500
 158
 159 struct vms_indexdef
 160 {
 161   /* Number of bytes used.  */
 162   unsigned char used[2];
 163
 164   /* VBN of the parent.  */
 165   unsigned char parent[4];
 166
 167   unsigned char fill_1[6];
 168
 169   /* The key field contains vms_idx/vms_elfidx structures, which are
 170      simply a key (= a string) and a rfa.  */
 171   unsigned char keys[INDEXDEF__BLKSIZ];
 172 };
 173
 174 /* An offset in a file.  */
 175
 176 struct vms_rfa
 177 {
 178   /* Logical block number, 1 based.
 179      0 means that the field is absent.  Block size is 512.  */
 180   unsigned char vbn[4];
 181
 182   /* Offset within the block.  */
 183   unsigned char offset[2];
 184 };
 185
 186 /* Index keys.  For version 3.  */
 187
 188 struct vms_idx
 189 {
 190   /* Offset from the start of the vbn, so minimum should be
 191      DATA__DATA (ie 6).  */
 192   struct vms_rfa rfa;
 193
 194   unsigned char keylen;
 195   /* The length of this field is in fact keylen.  */
 196   unsigned char keyname[256];
 197 };
 198
 199 /* Index keys, for version 4 and later.  */
 200
 201 struct vms_elfidx
 202 {
 203   struct vms_rfa rfa;
 204
 205   unsigned char keylen[2];
 206   unsigned char flags;
 207   unsigned char keyname[256];
 208 };
 209
 210 /* Flags of elfidx.  */
 211
 212 #define ELFIDX__WEAK 0x01       /* Weak symbol.  */
 213 #define ELFIDX__GROUP 0x02      /* Group symbol.  */
 214 #define ELFIDX__LISTRFA 0x04    /* RFA field points to an LHS.  */
 215 #define ELFIDX__SYMESC 0x08     /* Long symbol.  */
 216
 217 #define RFADEF__C_INDEX 0xffff
 218
 219 /* List head structure.  That's what is pointed by rfa when LISTRFA flag
 220    is set in elfidx.  */
 221
 222 struct vms_lhs
 223 {
 224   struct vms_rfa ng_g_rfa;      /* Non-group global.  */
 225   struct vms_rfa ng_wk_rfa;     /* Non-group weak.  */
 226   struct vms_rfa g_g_rfa;       /* Group global.  */
 227   struct vms_rfa g_wk_rfa;      /* Group weak.  */
 228   unsigned char flags;
 229 };
 230
 231 /* List node structure.  Fields of LHS point to this structure.  */
 232
 233 struct vms_lns
 234 {
 235   /* Next node in the list.  */
 236   struct vms_rfa nxtrfa;
 237
 238   /* Module associated with the key.  */
 239   struct vms_rfa modrfa;
 240 };
 241
 242 struct vms_datadef
 243 {
 244   /* Number of records in this block.  */
 245   unsigned char recs;
 246   unsigned char fill_1;
 247
 248   /* Next vbn.  */
 249   unsigned char link[4];
 250
 251   /* Data.  The first word is the record length, followed by record
 252      data and a possible pad byte so that record length is always aligned.  */
 253   unsigned char data[506];
 254 };
 255 #define DATA__LENGTH 512
 256 #define DATA__DATA 6
 257
 258 /* Key name block.  This is used for keys longer than 128 bytes.  */
 259
 260 struct vms_kbn
 261 {
 262   /* Length of the key chunk.  */
 263   unsigned char keylen[2];
 264
 265   /* RFA of the next chunk.  */
 266   struct vms_rfa rfa;
 267
 268   /* Followed by the key chunk.  */
 269 };
 270
 271 /* Module header.  */
 272 struct vms_mhd
 273 {
 274   /* Fixed part.  */
 275   unsigned char lbrflag;
 276   unsigned char id;
 277   unsigned char fill_1[2];
 278   unsigned char refcnt[4];
 279   unsigned char datim[8];
 280
 281   unsigned char objstat;
 282   /* Ident or GSMATCH.  */
 283   unsigned char objidlng;
 284   unsigned char objid[31];
 285
 286   unsigned char pad1[3];
 287   unsigned char otherefcnt[4];
 288   unsigned char modsize[4];
 289   unsigned char pad2[4];
 290 };
 291
 292 #define MHD__C_MHDID 0xad       /* Value for id.  */
 293 #define MHD__C_MHDLEN 16        /* Fixed part length.  */
 294 #define MHD__C_USRDAT 16
 295
 296 /* Flags for objstat.  */
 297 #define MHD__M_SELSRC 0x1       /* Selective search.  */
 298 #define MHD__M_OBJTIR 0x2
 299 #define MHD__M_WKSYM  0x4
 300
 301 struct vms_luh
 302 {
 303   unsigned char nxtluhblk[4];
 304   unsigned char spare[2];
 305   unsigned char data[506];
 306 };
 307
 308 struct vms_luhdef
 309 {
 310   unsigned char rechdr[2];
 311   unsigned char reclen[2];
 312 };
 313 #define LUH__RECHDRLEN 4
 314 #define LUH__RECHDRMRK 0xabba
 315 #define LUH__DATAFLDLEN 506
 316
 317 /* Entry in the history.  */
 318
 319 struct vms_leh
 320 {
 321   unsigned char date[8];
 322   unsigned char nbr_units[2];
 323   unsigned char action[2]; /* 1: delete, 2: insert, 3: replaced.  */
 324   unsigned char idlen;
 325   /* username
 326      modules... */
 327 };
 328
 329 #endif /* _VMS_LBR_H */