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/* Alpha NLM (NetWare Loadable Module) support for BFD. |
Copyright 1993, 2005, 2010 Free Software Foundation, Inc. |
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 |
it under the terms of the GNU General Public License as published by |
the Free Software Foundation; either version 3 of the License, or |
(at your option) any later version. |
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This program is distributed in the hope that it will be useful, |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
GNU General Public License for more details. |
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You should have received a copy of the GNU General Public License |
along with this program; if not, write to the Free Software |
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
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 |
{ |
/* Magic number. Must be NLM32_ALPHA_MAGIC. */ |
unsigned char magic[4]; |
/* Format descriptor. Current value is 2. */ |
unsigned char format[4]; |
/* Size of prefix header. */ |
unsigned char size[4]; |
/* Padding. */ |
unsigned char pad1[4]; |
/* More fields may be added later, supposedly. */ |
}; |
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/* The external format of an Alpha NLM reloc. This is the same as an |
Alpha ECOFF reloc. */ |
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struct nlm32_alpha_external_reloc |
{ |
unsigned char r_vaddr[8]; |
unsigned char r_symndx[4]; |
unsigned char r_bits[4]; |
}; |
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/* Constants to unpack the r_bits field of a reloc. */ |
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#define RELOC_BITS0_TYPE_LITTLE 0xff |
#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 |
#define RELOC_BITS1_OFFSET_SH_LITTLE 1 |
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#define RELOC_BITS1_RESERVED_LITTLE 0x80 |
#define RELOC_BITS1_RESERVED_SH_LITTLE 7 |
#define RELOC_BITS2_RESERVED_LITTLE 0xff |
#define RELOC_BITS2_RESERVED_SH_LEFT_LITTLE 1 |
#define RELOC_BITS3_RESERVED_LITTLE 0x03 |
#define RELOC_BITS3_RESERVED_SH_LEFT_LITTLE 9 |
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#define RELOC_BITS3_SIZE_LITTLE 0xfc |
#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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/* The signature field identifies the file as an NLM. It must contain |
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 |
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 |
by a period and a 1-3 character extension). The first byte is the byte |
length of the name and the last byte is a null terminator byte. This |
field is fixed length, and any unused bytes should be null bytes. The |
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 |
allocated at load time. Uninitialized data follows the initialized |
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 |
custom data is set by the CUSTOM keyword to NLMLINK. It is possible |
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. |
The module dependencies are determined by the MODULE keyword in |
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. |
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; |