include/nlm/ppc-ext.h

   1 /* PowerPC NLM (NetWare Loadable Module) support for BFD.
   2    Copyright (C) 1994-2017 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 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 #ifdef OLDFORMAT
  22
  23 /* The format of a PowerPC NLM changed.  These structures are only
  24    used in the old format.  */
  25
  26 /* A PowerPC NLM starts with an instance of this structure.  */
  27
  28 struct nlm32_powerpc_external_prefix_header
  29 {
  30   /* Signature.  Must be "AppleNLM".  */
  31   char signature[8];
  32   /* Version number.  Current value is 1.  */
  33   unsigned char headerVersion[4];
  34   /* ??.  Should be set to 0.  */
  35   unsigned char origins[4];
  36   /* File creation date in standard Unix time format (seconds since
  37      1/1/70).  */
  38   unsigned char date[4];
  39 };
  40
  41 #define NLM32_POWERPC_SIGNATURE "AppleNLM"
  42 #define NLM32_POWERPC_HEADER_VERSION 1
  43
  44 /* The external format of a PowerPC NLM reloc.  This is the same as an
  45    XCOFF dynamic reloc.  */
  46
  47 struct nlm32_powerpc_external_reloc
  48 {
  49   /* Address.  */
  50   unsigned char l_vaddr[4];
  51   /* Symbol table index.  This is 0 for .text and 1 for .data.  2
  52      means .bss, but I don't know if it is used.  In XCOFF, larger
  53      numbers are indices into the dynamic symbol table, but they are
  54      presumably not used in an NLM.  */
  55   unsigned char l_symndx[4];
  56   /* Relocation type.  */
  57   unsigned char l_rtype[2];
  58   /* Section number being relocated.  */
  59   unsigned char l_rsecnm[2];
  60 };
  61
  62 #endif /* OLDFORMAT */
  63
  64 /* The external format of the fixed header.  */
  65
  66 typedef struct nlm32_powerpc_external_fixed_header
  67 {
  68
  69   /* The signature field identifies the file as an NLM.  It must contain
  70      the signature string, which depends upon the NLM target. */
  71
  72   unsigned char signature[24];
  73
  74   /* The version of the header.  At this time, the highest version number
  75      is 4. */
  76
  77   unsigned char version[4];
  78
  79   /* The name of the module, which must be a DOS name (1-8 characters followed
  80      by a period and a 1-3 character extension).  The first byte is the byte
  81      length of the name and the last byte is a null terminator byte.  This
  82      field is fixed length, and any unused bytes should be null bytes.  The
  83      value is set by the OUTPUT keyword to NLMLINK. */
  84
  85   unsigned char moduleName[14];
  86
  87   /* Padding to make it come out correct. */
  88
  89   unsigned char pad1[2];
  90
  91   /* The byte offset of the code image from the start of the file. */
  92
  93   unsigned char codeImageOffset[4];
  94
  95   /* The size of the code image, in bytes. */
  96
  97   unsigned char codeImageSize[4];
  98
  99   /* The byte offset of the data image from the start of the file. */
 100
 101   unsigned char dataImageOffset[4];
 102
 103   /* The size of the data image, in bytes. */
 104
 105   unsigned char dataImageSize[4];
 106
 107   /* The size of the uninitialized data region that the loader is to be
 108      allocated at load time.  Uninitialized data follows the initialized
 109      data in the NLM address space. */
 110
 111   unsigned char uninitializedDataSize[4];
 112
 113   /* The byte offset of the custom data from the start of the file.  The
 114      custom data is set by the CUSTOM keyword to NLMLINK.  It is possible
 115      for this to be EOF if there is no custom data. */
 116
 117   unsigned char customDataOffset[4];
 118
 119   /* The size of the custom data, in bytes. */
 120
 121   unsigned char customDataSize[4];
 122
 123   /* The byte offset of the module dependencies from the start of the file.
 124      The module dependencies are determined by the MODULE keyword in
 125      NLMLINK. */
 126
 127   unsigned char moduleDependencyOffset[4];
 128
 129   /* The number of module dependencies at the moduleDependencyOffset. */
 130
 131   unsigned char numberOfModuleDependencies[4];
 132
 133   /* The byte offset of the relocation fixup data from the start of the file */
 134
 135   unsigned char relocationFixupOffset[4];
 136
 137   unsigned char numberOfRelocationFixups[4];
 138
 139   unsigned char externalReferencesOffset[4];
 140
 141   unsigned char numberOfExternalReferences[4];
 142
 143   unsigned char publicsOffset[4];
 144
 145   unsigned char numberOfPublics[4];
 146
 147   /* The byte offset of the internal debug info from the start of the file.
 148      It is possible for this to be EOF if there is no debug info. */
 149
 150   unsigned char debugInfoOffset[4];
 151
 152   unsigned char numberOfDebugRecords[4];
 153
 154   unsigned char codeStartOffset[4];
 155
 156   unsigned char exitProcedureOffset[4];
 157
 158   unsigned char checkUnloadProcedureOffset[4];
 159
 160   unsigned char moduleType[4];
 161
 162   unsigned char flags[4];
 163
 164 } Nlm32_powerpc_External_Fixed_Header;