167 lines
4.9 KiB
C
167 lines
4.9 KiB
C
/* Alpha NLM (NetWare Loadable Module) support for BFD.
|
|
Copyright 1993, 2005 Free Software Foundation, Inc.
|
|
By Ian Lance Taylor, Cygnus Support
|
|
|
|
This file is part of BFD, the Binary File Descriptor library.
|
|
|
|
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 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
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.
|
|
|
|
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. */
|
|
|
|
/* An Alpha NLM starts with an instance of this structure. */
|
|
|
|
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. */
|
|
};
|
|
|
|
/* The external format of an Alpha NLM reloc. This is the same as an
|
|
Alpha ECOFF reloc. */
|
|
|
|
struct nlm32_alpha_external_reloc
|
|
{
|
|
unsigned char r_vaddr[8];
|
|
unsigned char r_symndx[4];
|
|
unsigned char r_bits[4];
|
|
};
|
|
|
|
/* Constants to unpack the r_bits field of a reloc. */
|
|
|
|
#define RELOC_BITS0_TYPE_LITTLE 0xff
|
|
#define RELOC_BITS0_TYPE_SH_LITTLE 0
|
|
|
|
#define RELOC_BITS1_EXTERN_LITTLE 0x01
|
|
|
|
#define RELOC_BITS1_OFFSET_LITTLE 0x7e
|
|
#define RELOC_BITS1_OFFSET_SH_LITTLE 1
|
|
|
|
#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
|
|
|
|
#define RELOC_BITS3_SIZE_LITTLE 0xfc
|
|
#define RELOC_BITS3_SIZE_SH_LITTLE 2
|
|
|
|
/* The external format of the fixed header. */
|
|
|
|
typedef struct nlm32_alpha_external_fixed_header
|
|
{
|
|
|
|
/* The signature field identifies the file as an NLM. It must contain
|
|
the signature string, which depends upon the NLM target. */
|
|
|
|
unsigned char signature[24];
|
|
|
|
/* The version of the header. At this time, the highest version number
|
|
is 4. */
|
|
|
|
unsigned char version[4];
|
|
|
|
/* 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. */
|
|
|
|
unsigned char moduleName[14];
|
|
|
|
/* Padding to make it come out correct. */
|
|
|
|
unsigned char pad1[2];
|
|
|
|
/* The byte offset of the code image from the start of the file. */
|
|
|
|
unsigned char codeImageOffset[4];
|
|
|
|
/* The size of the code image, in bytes. */
|
|
|
|
unsigned char codeImageSize[4];
|
|
|
|
/* The byte offset of the data image from the start of the file. */
|
|
|
|
unsigned char dataImageOffset[4];
|
|
|
|
/* The size of the data image, in bytes. */
|
|
|
|
unsigned char dataImageSize[4];
|
|
|
|
/* 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. */
|
|
|
|
unsigned char uninitializedDataSize[4];
|
|
|
|
/* 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. */
|
|
|
|
unsigned char customDataOffset[4];
|
|
|
|
/* The size of the custom data, in bytes. */
|
|
|
|
unsigned char customDataSize[4];
|
|
|
|
/* The byte offset of the module dependencies from the start of the file.
|
|
The module dependencies are determined by the MODULE keyword in
|
|
NLMLINK. */
|
|
|
|
unsigned char moduleDependencyOffset[4];
|
|
|
|
/* The number of module dependencies at the moduleDependencyOffset. */
|
|
|
|
unsigned char numberOfModuleDependencies[4];
|
|
|
|
/* The byte offset of the relocation fixup data from the start of the file */
|
|
|
|
unsigned char relocationFixupOffset[4];
|
|
|
|
unsigned char numberOfRelocationFixups[4];
|
|
|
|
unsigned char externalReferencesOffset[4];
|
|
|
|
unsigned char numberOfExternalReferences[4];
|
|
|
|
unsigned char publicsOffset[4];
|
|
|
|
unsigned char numberOfPublics[4];
|
|
|
|
/* 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. */
|
|
|
|
unsigned char debugInfoOffset[4];
|
|
|
|
unsigned char numberOfDebugRecords[4];
|
|
|
|
unsigned char codeStartOffset[4];
|
|
|
|
unsigned char exitProcedureOffset[4];
|
|
|
|
unsigned char checkUnloadProcedureOffset[4];
|
|
|
|
unsigned char moduleType[4];
|
|
|
|
unsigned char flags[4];
|
|
|
|
} Nlm32_alpha_External_Fixed_Header;
|