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/* PowerPC NLM (NetWare Loadable Module) support for BFD.
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   Copyright (C) 1994-2015 Free Software Foundation, Inc.
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   This file is part of BFD, the Binary File Descriptor library.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program; if not, write to the Free Software
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   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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   MA 02110-1301, USA.  */
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#ifdef OLDFORMAT
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/* The format of a PowerPC NLM changed.  These structures are only
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   used in the old format.  */
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/* A PowerPC NLM starts with an instance of this structure.  */
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struct nlm32_powerpc_external_prefix_header
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{
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  /* Signature.  Must be "AppleNLM".  */
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  char signature[8];
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  /* Version number.  Current value is 1.  */
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  unsigned char headerVersion[4];
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  /* ??.  Should be set to 0.  */
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  unsigned char origins[4];
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  /* File creation date in standard Unix time format (seconds since
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     1/1/70).  */
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  unsigned char date[4];
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};
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#define NLM32_POWERPC_SIGNATURE "AppleNLM"
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#define NLM32_POWERPC_HEADER_VERSION 1
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/* The external format of a PowerPC NLM reloc.  This is the same as an
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   XCOFF dynamic reloc.  */
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struct nlm32_powerpc_external_reloc
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{
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  /* Address.  */
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  unsigned char l_vaddr[4];
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  /* Symbol table index.  This is 0 for .text and 1 for .data.  2
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     means .bss, but I don't know if it is used.  In XCOFF, larger
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     numbers are indices into the dynamic symbol table, but they are
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     presumably not used in an NLM.  */
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  unsigned char l_symndx[4];
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  /* Relocation type.  */
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  unsigned char l_rtype[2];
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  /* Section number being relocated.  */
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  unsigned char l_rsecnm[2];
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};
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#endif /* OLDFORMAT */
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/* The external format of the fixed header.  */
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typedef struct nlm32_powerpc_external_fixed_header
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{
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  /* The signature field identifies the file as an NLM.  It must contain
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     the signature string, which depends upon the NLM target. */
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  unsigned char signature[24];
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  /* The version of the header.  At this time, the highest version number
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     is 4. */
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  unsigned char version[4];
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  /* The name of the module, which must be a DOS name (1-8 characters followed
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     by a period and a 1-3 character extension).  The first byte is the byte
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     length of the name and the last byte is a null terminator byte.  This
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     field is fixed length, and any unused bytes should be null bytes.  The
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     value is set by the OUTPUT keyword to NLMLINK. */
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  unsigned char moduleName[14];
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  /* Padding to make it come out correct. */
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  unsigned char pad1[2];
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  /* The byte offset of the code image from the start of the file. */
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  unsigned char codeImageOffset[4];
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  /* The size of the code image, in bytes. */
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  unsigned char codeImageSize[4];
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  /* The byte offset of the data image from the start of the file. */
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  unsigned char dataImageOffset[4];
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  /* The size of the data image, in bytes. */
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  unsigned char dataImageSize[4];
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  /* The size of the uninitialized data region that the loader is to be
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     allocated at load time.  Uninitialized data follows the initialized
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     data in the NLM address space. */
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  unsigned char uninitializedDataSize[4];
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  /* The byte offset of the custom data from the start of the file.  The
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     custom data is set by the CUSTOM keyword to NLMLINK.  It is possible
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     for this to be EOF if there is no custom data. */
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  unsigned char customDataOffset[4];
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  /* The size of the custom data, in bytes. */
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  unsigned char customDataSize[4];
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  /* The byte offset of the module dependencies from the start of the file.
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     The module dependencies are determined by the MODULE keyword in
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     NLMLINK. */
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  unsigned char moduleDependencyOffset[4];
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  /* The number of module dependencies at the moduleDependencyOffset. */
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  unsigned char numberOfModuleDependencies[4];
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  /* The byte offset of the relocation fixup data from the start of the file */
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  unsigned char relocationFixupOffset[4];
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  unsigned char numberOfRelocationFixups[4];
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  unsigned char externalReferencesOffset[4];
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  unsigned char numberOfExternalReferences[4];
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  unsigned char publicsOffset[4];
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  unsigned char numberOfPublics[4];
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  /* The byte offset of the internal debug info from the start of the file.
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     It is possible for this to be EOF if there is no debug info. */
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  unsigned char debugInfoOffset[4];
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  unsigned char numberOfDebugRecords[4];
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  unsigned char codeStartOffset[4];
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  unsigned char exitProcedureOffset[4];
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  unsigned char checkUnloadProcedureOffset[4];
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  unsigned char moduleType[4];
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  unsigned char flags[4];
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} Nlm32_powerpc_External_Fixed_Header;