include/nlm/ppc-ext.h

   1 /* PowerPC NLM (NetWare Loadable Module) support for BFD.
   2    Copyright (C) 1994 Free Software Foundation, Inc.
   3
   4 This file is part of BFD, the Binary File Descriptor library.
   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 #ifdef OLDFORMAT
  21
  22 /* The format of a PowerPC NLM changed.  These structures are only
  23    used in the old format.  */
  24
  25 /* A PowerPC NLM starts with an instance of this structure.  */
  26
  27 struct nlm32_powerpc_external_prefix_header
  28 {
  29   /* Signature.  Must be "AppleNLM".  */
  30   char signature[8];
  31   /* Version number.  Current value is 1.  */
  32   unsigned char headerVersion[4];
  33   /* ??.  Should be set to 0.  */
  34   unsigned char origins[4];
  35   /* File creation date in standard Unix time format (seconds since
  36      1/1/70).  */
  37   unsigned char date[4];
  38 };
  39
  40 #define NLM32_POWERPC_SIGNATURE "AppleNLM"
  41 #define NLM32_POWERPC_HEADER_VERSION 1
  42
  43 /* The external format of a PowerPC NLM reloc.  This is the same as an
  44    XCOFF dynamic reloc.  */
  45
  46 struct nlm32_powerpc_external_reloc
  47 {
  48   /* Address.  */
  49   unsigned char l_vaddr[4];
  50   /* Symbol table index.  This is 0 for .text and 1 for .data.  2
  51      means .bss, but I don't know if it is used.  In XCOFF, larger
  52      numbers are indices into the dynamic symbol table, but they are
  53      presumably not used in an NLM.  */
  54   unsigned char l_symndx[4];
  55   /* Relocation type.  */
  56   unsigned char l_rtype[2];
  57   /* Section number being relocated.  */
  58   unsigned char l_rsecnm[2];
  59 };
  60
  61 #endif /* OLDFORMAT */
  62
  63 /* The external format of the fixed header.  */
  64
  65 typedef struct nlm32_powerpc_external_fixed_header
  66 {
  67
  68   /* The signature field identifies the file as an NLM.  It must contain
  69      the signature string, which depends upon the NLM target. */
  70
  71   unsigned char signature[24];
  72
  73   /* The version of the header.  At this time, the highest version number
  74      is 4. */
  75
  76   unsigned char version[4];
  77
  78   /* The name of the module, which must be a DOS name (1-8 characters followed
  79      by a period and a 1-3 character extension).  The first byte is the byte
  80      length of the name and the last byte is a null terminator byte.  This
  81      field is fixed length, and any unused bytes should be null bytes.  The
  82      value is set by the OUTPUT keyword to NLMLINK. */
  83
  84   unsigned char moduleName[14];
  85
  86   /* Padding to make it come out correct. */
  87
  88   unsigned char pad1[2];
  89
  90   /* The byte offset of the code image from the start of the file. */
  91
  92   unsigned char codeImageOffset[4];
  93
  94   /* The size of the code image, in bytes. */
  95
  96   unsigned char codeImageSize[4];
  97
  98   /* The byte offset of the data image from the start of the file. */
  99
 100   unsigned char dataImageOffset[4];
 101
 102   /* The size of the data image, in bytes. */
 103
 104   unsigned char dataImageSize[4];
 105
 106   /* The size of the uninitialized data region that the loader is to be
 107      allocated at load time.  Uninitialized data follows the initialized
 108      data in the NLM address space. */
 109
 110   unsigned char uninitializedDataSize[4];
 111
 112   /* The byte offset of the custom data from the start of the file.  The
 113      custom data is set by the CUSTOM keyword to NLMLINK.  It is possible
 114      for this to be EOF if there is no custom data. */
 115
 116   unsigned char customDataOffset[4];
 117
 118   /* The size of the custom data, in bytes. */
 119
 120   unsigned char customDataSize[4];
 121
 122   /* The byte offset of the module dependencies from the start of the file.
 123      The module dependencies are determined by the MODULE keyword in
 124      NLMLINK. */
 125
 126   unsigned char moduleDependencyOffset[4];
 127
 128   /* The number of module dependencies at the moduleDependencyOffset. */
 129
 130   unsigned char numberOfModuleDependencies[4];
 131
 132   /* The byte offset of the relocation fixup data from the start of the file */
 133
 134   unsigned char relocationFixupOffset[4];
 135
 136   unsigned char numberOfRelocationFixups[4];
 137
 138   unsigned char externalReferencesOffset[4];
 139
 140   unsigned char numberOfExternalReferences[4];
 141
 142   unsigned char publicsOffset[4];
 143
 144   unsigned char numberOfPublics[4];
 145
 146   /* The byte offset of the internal debug info from the start of the file.
 147      It is possible for this to be EOF if there is no debug info. */
 148
 149   unsigned char debugInfoOffset[4];
 150
 151   unsigned char numberOfDebugRecords[4];
 152
 153   unsigned char codeStartOffset[4];
 154
 155   unsigned char exitProcedureOffset[4];
 156
 157   unsigned char checkUnloadProcedureOffset[4];
 158
 159   unsigned char moduleType[4];
 160
 161   unsigned char flags[4];
 162
 163 } Nlm32_powerpc_External_Fixed_Header;