source: trunk/libs/newlib/src/include/nlm/alpha-ext.h @ 532

Last change on this file since 532 was 444, checked in by satin@…, 6 years ago

add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc

File size: 5.0 KB
Line 
1/* Alpha NLM (NetWare Loadable Module) support for BFD.
2   Copyright 1993, 2005, 2010 Free Software Foundation, Inc.
3   By Ian Lance Taylor, Cygnus Support
4
5   This file is part of BFD, the Binary File Descriptor library.
6
7   This program is free software; you can redistribute it and/or modify
8   it under the terms of the GNU General Public License as published by
9   the Free Software Foundation; either version 3 of the License, or
10   (at your option) any later version.
11
12   This program is distributed in the hope that it will be useful,
13   but WITHOUT ANY WARRANTY; without even the implied warranty of
14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   GNU General Public License for more details.
16
17   You should have received a copy of the GNU General Public License
18   along with this program; if not, write to the Free Software
19   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20   MA 02110-1301, USA.  */
21
22/* An Alpha NLM starts with an instance of this structure.  */
23
24struct nlm32_alpha_external_prefix_header
25{
26  /* Magic number.  Must be NLM32_ALPHA_MAGIC.  */
27  unsigned char magic[4];
28  /* Format descriptor.  Current value is 2.  */
29  unsigned char format[4];
30  /* Size of prefix header.  */
31  unsigned char size[4];
32  /* Padding.  */
33  unsigned char pad1[4];
34  /* More fields may be added later, supposedly.  */
35};
36
37/* The external format of an Alpha NLM reloc.  This is the same as an
38   Alpha ECOFF reloc.  */
39
40struct nlm32_alpha_external_reloc
41{
42  unsigned char r_vaddr[8];
43  unsigned char r_symndx[4];
44  unsigned char r_bits[4];
45};
46
47/* Constants to unpack the r_bits field of a reloc.  */
48
49#define RELOC_BITS0_TYPE_LITTLE                 0xff
50#define RELOC_BITS0_TYPE_SH_LITTLE              0
51
52#define RELOC_BITS1_EXTERN_LITTLE               0x01
53
54#define RELOC_BITS1_OFFSET_LITTLE               0x7e
55#define RELOC_BITS1_OFFSET_SH_LITTLE            1
56
57#define RELOC_BITS1_RESERVED_LITTLE             0x80
58#define RELOC_BITS1_RESERVED_SH_LITTLE          7
59#define RELOC_BITS2_RESERVED_LITTLE             0xff
60#define RELOC_BITS2_RESERVED_SH_LEFT_LITTLE     1
61#define RELOC_BITS3_RESERVED_LITTLE             0x03
62#define RELOC_BITS3_RESERVED_SH_LEFT_LITTLE     9
63
64#define RELOC_BITS3_SIZE_LITTLE                 0xfc
65#define RELOC_BITS3_SIZE_SH_LITTLE              2
66
67/* The external format of the fixed header.  */
68
69typedef struct nlm32_alpha_external_fixed_header
70{
71
72  /* The signature field identifies the file as an NLM.  It must contain
73     the signature string, which depends upon the NLM target. */
74
75  unsigned char signature[24];
76
77  /* The version of the header.  At this time, the highest version number
78     is 4. */
79
80  unsigned char version[4];
81
82  /* The name of the module, which must be a DOS name (1-8 characters followed
83     by a period and a 1-3 character extension).  The first byte is the byte
84     length of the name and the last byte is a null terminator byte.  This
85     field is fixed length, and any unused bytes should be null bytes.  The
86     value is set by the OUTPUT keyword to NLMLINK. */
87
88  unsigned char moduleName[14];
89
90  /* Padding to make it come out correct. */
91
92  unsigned char pad1[2];
93
94  /* The byte offset of the code image from the start of the file. */
95
96  unsigned char codeImageOffset[4];
97
98  /* The size of the code image, in bytes. */
99
100  unsigned char codeImageSize[4];
101
102  /* The byte offset of the data image from the start of the file. */
103
104  unsigned char dataImageOffset[4];
105
106  /* The size of the data image, in bytes. */
107
108  unsigned char dataImageSize[4];
109
110  /* The size of the uninitialized data region that the loader is to be
111     allocated at load time.  Uninitialized data follows the initialized
112     data in the NLM address space. */
113
114  unsigned char uninitializedDataSize[4];
115
116  /* The byte offset of the custom data from the start of the file.  The
117     custom data is set by the CUSTOM keyword to NLMLINK.  It is possible
118     for this to be EOF if there is no custom data. */
119
120  unsigned char customDataOffset[4];
121
122  /* The size of the custom data, in bytes. */
123
124  unsigned char customDataSize[4];
125
126  /* The byte offset of the module dependencies from the start of the file.
127     The module dependencies are determined by the MODULE keyword in
128     NLMLINK. */
129
130  unsigned char moduleDependencyOffset[4];
131
132  /* The number of module dependencies at the moduleDependencyOffset. */
133
134  unsigned char numberOfModuleDependencies[4];
135
136  /* The byte offset of the relocation fixup data from the start of the file */
137     
138  unsigned char relocationFixupOffset[4];
139
140  unsigned char numberOfRelocationFixups[4];
141
142  unsigned char externalReferencesOffset[4];
143
144  unsigned char numberOfExternalReferences[4];
145
146  unsigned char publicsOffset[4];
147
148  unsigned char numberOfPublics[4];
149
150  /* The byte offset of the internal debug info from the start of the file.
151     It is possible for this to be EOF if there is no debug info. */
152
153  unsigned char debugInfoOffset[4];
154
155  unsigned char numberOfDebugRecords[4];
156
157  unsigned char codeStartOffset[4];
158
159  unsigned char exitProcedureOffset[4];
160
161  unsigned char checkUnloadProcedureOffset[4];
162
163  unsigned char moduleType[4];
164
165  unsigned char flags[4];
166
167} Nlm32_alpha_External_Fixed_Header;
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