168 lines
5.0 KiB
C
168 lines
5.0 KiB
C
/* Alpha NLM (NetWare Loadable Module) support for BFD.
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Copyright 1993, 2005, 2010 Free Software Foundation, Inc.
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By Ian Lance Taylor, 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 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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/* An Alpha NLM starts with an instance of this structure. */
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struct nlm32_alpha_external_prefix_header
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{
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/* Magic number. Must be NLM32_ALPHA_MAGIC. */
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unsigned char magic[4];
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/* Format descriptor. Current value is 2. */
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unsigned char format[4];
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/* Size of prefix header. */
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unsigned char size[4];
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/* Padding. */
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unsigned char pad1[4];
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/* More fields may be added later, supposedly. */
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};
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/* The external format of an Alpha NLM reloc. This is the same as an
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Alpha ECOFF reloc. */
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struct nlm32_alpha_external_reloc
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{
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unsigned char r_vaddr[8];
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unsigned char r_symndx[4];
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unsigned char r_bits[4];
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};
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/* Constants to unpack the r_bits field of a reloc. */
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#define RELOC_BITS0_TYPE_LITTLE 0xff
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#define RELOC_BITS0_TYPE_SH_LITTLE 0
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#define RELOC_BITS1_EXTERN_LITTLE 0x01
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#define RELOC_BITS1_OFFSET_LITTLE 0x7e
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#define RELOC_BITS1_OFFSET_SH_LITTLE 1
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#define RELOC_BITS1_RESERVED_LITTLE 0x80
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#define RELOC_BITS1_RESERVED_SH_LITTLE 7
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#define RELOC_BITS2_RESERVED_LITTLE 0xff
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#define RELOC_BITS2_RESERVED_SH_LEFT_LITTLE 1
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#define RELOC_BITS3_RESERVED_LITTLE 0x03
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#define RELOC_BITS3_RESERVED_SH_LEFT_LITTLE 9
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#define RELOC_BITS3_SIZE_LITTLE 0xfc
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#define RELOC_BITS3_SIZE_SH_LITTLE 2
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/* The external format of the fixed header. */
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typedef struct nlm32_alpha_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_alpha_External_Fixed_Header;
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