260 lines
7.6 KiB
C
260 lines
7.6 KiB
C
/* NLM (NetWare Loadable Module) support for BFD.
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Copyright (C) 1993 Free Software Foundation, Inc.
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Written by Fred Fish @ Cygnus Support
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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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* This file is part of NLM support for BFD, and contains the portions
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that describe how NLM is represented externally by the BFD library.
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I.E. it describes the in-file representation of NLM. It requires
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the nlm/common.h file which contains the portions that are common to
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both the internal and external representations.
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Note that an NLM header consists of three parts:
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(1) A fixed length header that has specific fields of known length,
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at specific offsets in the file.
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(2) A variable length header that has specific fields in a specific
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order, but some fields may be variable length.
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(3) A auxiliary header that has various optional fields in no specific
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order. There is no way to identify the end of the auxiliary headers
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except by finding a header without a recognized 'stamp'.
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*/
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#define TARGET_LONG_SIZE 4
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#define TARGET_ADDRESS_SIZE 4
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/* NLM Header (32-bit implementations) */
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typedef struct nlm32_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 string defined by NLM_SIGNATURE. */
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unsigned char signature[NLM_SIGNATURE_SIZE];
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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[TARGET_LONG_SIZE];
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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[NLM_MODULE_NAME_SIZE];
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/* The byte offset of the code image from the start of the file. */
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unsigned char codeImageOffset[TARGET_LONG_SIZE];
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/* The size of the code image, in bytes. */
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unsigned char codeImageSize[TARGET_LONG_SIZE];
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/* The byte offset of the data image from the start of the file. */
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unsigned char dataImageOffset[TARGET_LONG_SIZE];
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/* The size of the data image, in bytes. */
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unsigned char dataImageSize[TARGET_LONG_SIZE];
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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[TARGET_LONG_SIZE];
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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[TARGET_LONG_SIZE];
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/* The size of the custom data, in bytes. */
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unsigned char customDataSize[TARGET_LONG_SIZE];
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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[TARGET_LONG_SIZE];
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/* The number of module dependencies at the moduleDependencyOffset. */
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unsigned char numberOfModuleDependencies[TARGET_LONG_SIZE];
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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[TARGET_LONG_SIZE];
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unsigned char numberOfRelocationFixups[TARGET_LONG_SIZE];
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unsigned char externalReferencesOffset[TARGET_LONG_SIZE];
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unsigned char numberOfExternalReferences[TARGET_LONG_SIZE];
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unsigned char publicsOffset[TARGET_LONG_SIZE];
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unsigned char numberOfPublics[TARGET_LONG_SIZE];
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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[TARGET_LONG_SIZE];
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unsigned char numberOfDebugRecords[TARGET_LONG_SIZE];
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unsigned char codeStartOffset[TARGET_LONG_SIZE];
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unsigned char exitProcedureOffset[TARGET_LONG_SIZE];
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unsigned char checkUnloadProcedureOffset[TARGET_LONG_SIZE];
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unsigned char moduleType[TARGET_LONG_SIZE];
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unsigned char flags[TARGET_LONG_SIZE];
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} Nlm32_External_Fixed_Header;
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/* The version header is one of the optional auxiliary headers and
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follows the fixed length and variable length NLM headers. */
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typedef struct nlm32_external_version_header
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{
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/* The header is recognized by "VeRsIoN#" in the stamp field. */
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char stamp[8];
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unsigned char majorVersion[TARGET_LONG_SIZE];
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unsigned char minorVersion[TARGET_LONG_SIZE];
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unsigned char revision[TARGET_LONG_SIZE];
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unsigned char year[TARGET_LONG_SIZE];
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unsigned char month[TARGET_LONG_SIZE];
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unsigned char day[TARGET_LONG_SIZE];
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} Nlm32_External_Version_Header;
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typedef struct nlm32_external_copyright_header
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{
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/* The header is recognized by "CoPyRiGhT=" in the stamp field. */
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char stamp[10];
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unsigned char copyrightMessageLength[1];
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/* There is a variable length field here called 'copyrightMessage'
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that is the length specified by copyrightMessageLength. */
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} Nlm32_External_Copyright_Header;
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typedef struct nlm32_external_extended_header
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{
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/* The header is recognized by "MeSsAgEs" in the stamp field. */
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char stamp[8];
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unsigned char languageID[TARGET_LONG_SIZE];
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unsigned char messageFileOffset[TARGET_LONG_SIZE];
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unsigned char messageFileLength[TARGET_LONG_SIZE];
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unsigned char messageCount[TARGET_LONG_SIZE];
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unsigned char helpFileOffset[TARGET_LONG_SIZE];
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unsigned char helpFileLength[TARGET_LONG_SIZE];
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unsigned char RPCDataOffset[TARGET_LONG_SIZE];
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unsigned char RPCDataLength[TARGET_LONG_SIZE];
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unsigned char sharedCodeOffset[TARGET_LONG_SIZE];
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unsigned char sharedCodeLength[TARGET_LONG_SIZE];
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unsigned char sharedDataOffset[TARGET_LONG_SIZE];
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unsigned char sharedDataLength[TARGET_LONG_SIZE];
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unsigned char sharedRelocationFixupOffset[TARGET_LONG_SIZE];
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unsigned char sharedRelocationFixupCount[TARGET_LONG_SIZE];
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unsigned char sharedExternalReferenceOffset[TARGET_LONG_SIZE];
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unsigned char sharedExternalReferenceCount[TARGET_LONG_SIZE];
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unsigned char sharedPublicsOffset[TARGET_LONG_SIZE];
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unsigned char sharedPublicsCount[TARGET_LONG_SIZE];
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unsigned char sharedInitializationOffset[TARGET_ADDRESS_SIZE];
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unsigned char SharedExitProcedureOffset[TARGET_ADDRESS_SIZE];
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unsigned char productID[TARGET_LONG_SIZE];
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unsigned char reserved0[TARGET_LONG_SIZE];
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unsigned char reserved1[TARGET_LONG_SIZE];
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unsigned char reserved2[TARGET_LONG_SIZE];
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unsigned char reserved3[TARGET_LONG_SIZE];
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unsigned char reserved4[TARGET_LONG_SIZE];
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unsigned char reserved5[TARGET_LONG_SIZE];
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} Nlm32_External_Extended_Header;
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typedef struct nlm32_external_custom_header
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{
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/* The header is recognized by "CuStHeAd" in the stamp field. */
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char stamp[8];
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unsigned char dataLength[TARGET_LONG_SIZE];
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unsigned char debugRecOffset[TARGET_LONG_SIZE];
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unsigned char debugRecLength[TARGET_LONG_SIZE];
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} Nlm32_External_Custom_Header;
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