| /* Alpha NLM (NetWare Loadable Module) support for BFD. |
| Copyright 1993 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; |