source: trunk/libs/newlib/src/include/elf/external.h @ 467

Last change on this file since 467 was 444, checked in by satin@…, 6 years ago

add newlib,libalmos-mkh, restructure shared_syscalls.h and mini-libc
File size: 10.7 KB
RevLine 
[444]1/* ELF support for BFD.
2   Copyright 1991, 1992, 1993, 1995, 1997, 1998, 1999, 2001, 2003, 2005,
3   2008, 2010 Free Software Foundation, Inc.
4
5   Written by Fred Fish @ Cygnus Support, from information published
6   in "UNIX System V Release 4, Programmers Guide: ANSI C and
7   Programming Support Tools".
8
9   This file is part of BFD, the Binary File Descriptor library.
10
11   This program is free software; you can redistribute it and/or modify
12   it under the terms of the GNU General Public License as published by
13   the Free Software Foundation; either version 3 of the License, or
14   (at your option) any later version.
15
16   This program is distributed in the hope that it will be useful,
17   but WITHOUT ANY WARRANTY; without even the implied warranty of
18   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19   GNU General Public License for more details.
20
21   You should have received a copy of the GNU General Public License
22   along with this program; if not, write to the Free Software
23   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
24   MA 02110-1301, USA.  */
25
26/* This file is part of ELF support for BFD, and contains the portions
27   that describe how ELF is represented externally by the BFD library.
28   I.E. it describes the in-file representation of ELF.  It requires
29   the elf/common.h file which contains the portions that are common to
30   both the internal and external representations.  */
31
32/* The 64-bit stuff is kind of random.  Perhaps someone will publish a
33   spec someday.  */
34
35#ifndef _ELF_EXTERNAL_H
36#define _ELF_EXTERNAL_H
37
38/* Special section indices, which may show up in st_shndx fields, among
39   other places.  */
40
41#define SHN_LORESERVE   0xFF00          /* Begin range of reserved indices */
42#define SHN_LOPROC      0xFF00          /* Begin range of appl-specific */
43#define SHN_HIPROC      0xFF1F          /* End range of appl-specific */
44#define SHN_LOOS        0xFF20          /* OS specific semantics, lo */
45#define SHN_HIOS        0xFF3F          /* OS specific semantics, hi */
46#define SHN_ABS         0xFFF1          /* Associated symbol is absolute */
47#define SHN_COMMON      0xFFF2          /* Associated symbol is in common */
48#define SHN_XINDEX      0xFFFF          /* Section index is held elsewhere */
49#define SHN_HIRESERVE   0xFFFF          /* End range of reserved indices */
50
51/* ELF Header (32-bit implementations) */
52
53typedef struct {
54  unsigned char e_ident[16];            /* ELF "magic number" */
55  unsigned char e_type[2];              /* Identifies object file type */
56  unsigned char e_machine[2];           /* Specifies required architecture */
57  unsigned char e_version[4];           /* Identifies object file version */
58  unsigned char e_entry[4];             /* Entry point virtual address */
59  unsigned char e_phoff[4];             /* Program header table file offset */
60  unsigned char e_shoff[4];             /* Section header table file offset */
61  unsigned char e_flags[4];             /* Processor-specific flags */
62  unsigned char e_ehsize[2];            /* ELF header size in bytes */
63  unsigned char e_phentsize[2];         /* Program header table entry size */
64  unsigned char e_phnum[2];             /* Program header table entry count */
65  unsigned char e_shentsize[2];         /* Section header table entry size */
66  unsigned char e_shnum[2];             /* Section header table entry count */
67  unsigned char e_shstrndx[2];          /* Section header string table index */
68} Elf32_External_Ehdr;
69
70typedef struct {
71  unsigned char e_ident[16];            /* ELF "magic number" */
72  unsigned char e_type[2];              /* Identifies object file type */
73  unsigned char e_machine[2];           /* Specifies required architecture */
74  unsigned char e_version[4];           /* Identifies object file version */
75  unsigned char e_entry[8];             /* Entry point virtual address */
76  unsigned char e_phoff[8];             /* Program header table file offset */
77  unsigned char e_shoff[8];             /* Section header table file offset */
78  unsigned char e_flags[4];             /* Processor-specific flags */
79  unsigned char e_ehsize[2];            /* ELF header size in bytes */
80  unsigned char e_phentsize[2];         /* Program header table entry size */
81  unsigned char e_phnum[2];             /* Program header table entry count */
82  unsigned char e_shentsize[2];         /* Section header table entry size */
83  unsigned char e_shnum[2];             /* Section header table entry count */
84  unsigned char e_shstrndx[2];          /* Section header string table index */
85} Elf64_External_Ehdr;
86
87/* Program header */
88
89typedef struct {
90  unsigned char p_type[4];              /* Identifies program segment type */
91  unsigned char p_offset[4];            /* Segment file offset */
92  unsigned char p_vaddr[4];             /* Segment virtual address */
93  unsigned char p_paddr[4];             /* Segment physical address */
94  unsigned char p_filesz[4];            /* Segment size in file */
95  unsigned char p_memsz[4];             /* Segment size in memory */
96  unsigned char p_flags[4];             /* Segment flags */
97  unsigned char p_align[4];             /* Segment alignment, file & memory */
98} Elf32_External_Phdr;
99
100typedef struct {
101  unsigned char p_type[4];              /* Identifies program segment type */
102  unsigned char p_flags[4];             /* Segment flags */
103  unsigned char p_offset[8];            /* Segment file offset */
104  unsigned char p_vaddr[8];             /* Segment virtual address */
105  unsigned char p_paddr[8];             /* Segment physical address */
106  unsigned char p_filesz[8];            /* Segment size in file */
107  unsigned char p_memsz[8];             /* Segment size in memory */
108  unsigned char p_align[8];             /* Segment alignment, file & memory */
109} Elf64_External_Phdr;
110
111/* Section header */
112
113typedef struct {
114  unsigned char sh_name[4];             /* Section name, index in string tbl */
115  unsigned char sh_type[4];             /* Type of section */
116  unsigned char sh_flags[4];            /* Miscellaneous section attributes */
117  unsigned char sh_addr[4];             /* Section virtual addr at execution */
118  unsigned char sh_offset[4];           /* Section file offset */
119  unsigned char sh_size[4];             /* Size of section in bytes */
120  unsigned char sh_link[4];             /* Index of another section */
121  unsigned char sh_info[4];             /* Additional section information */
122  unsigned char sh_addralign[4];        /* Section alignment */
123  unsigned char sh_entsize[4];          /* Entry size if section holds table */
124} Elf32_External_Shdr;
125
126typedef struct {
127  unsigned char sh_name[4];             /* Section name, index in string tbl */
128  unsigned char sh_type[4];             /* Type of section */
129  unsigned char sh_flags[8];            /* Miscellaneous section attributes */
130  unsigned char sh_addr[8];             /* Section virtual addr at execution */
131  unsigned char sh_offset[8];           /* Section file offset */
132  unsigned char sh_size[8];             /* Size of section in bytes */
133  unsigned char sh_link[4];             /* Index of another section */
134  unsigned char sh_info[4];             /* Additional section information */
135  unsigned char sh_addralign[8];        /* Section alignment */
136  unsigned char sh_entsize[8];          /* Entry size if section holds table */
137} Elf64_External_Shdr;
138
139/* Symbol table entry */
140
141typedef struct {
142  unsigned char st_name[4];             /* Symbol name, index in string tbl */
143  unsigned char st_value[4];            /* Value of the symbol */
144  unsigned char st_size[4];             /* Associated symbol size */
145  unsigned char st_info[1];             /* Type and binding attributes */
146  unsigned char st_other[1];            /* No defined meaning, 0 */
147  unsigned char st_shndx[2];            /* Associated section index */
148} Elf32_External_Sym;
149
150typedef struct {
151  unsigned char st_name[4];             /* Symbol name, index in string tbl */
152  unsigned char st_info[1];             /* Type and binding attributes */
153  unsigned char st_other[1];            /* No defined meaning, 0 */
154  unsigned char st_shndx[2];            /* Associated section index */
155  unsigned char st_value[8];            /* Value of the symbol */
156  unsigned char st_size[8];             /* Associated symbol size */
157} Elf64_External_Sym;
158
159typedef struct {
160  unsigned char est_shndx[4];           /* Section index */
161} Elf_External_Sym_Shndx;
162
163/* Note segments */
164
165typedef struct {
166  unsigned char namesz[4];              /* Size of entry's owner string */
167  unsigned char descsz[4];              /* Size of the note descriptor */
168  unsigned char type[4];                /* Interpretation of the descriptor */
169  char          name[1];                /* Start of the name+desc data */
170} Elf_External_Note;
171
172/* Relocation Entries */
173typedef struct {
174  unsigned char r_offset[4];    /* Location at which to apply the action */
175  unsigned char r_info[4];      /* index and type of relocation */
176} Elf32_External_Rel;
177
178typedef struct {
179  unsigned char r_offset[4];    /* Location at which to apply the action */
180  unsigned char r_info[4];      /* index and type of relocation */
181  unsigned char r_addend[4];    /* Constant addend used to compute value */
182} Elf32_External_Rela;
183
184typedef struct {
185  unsigned char r_offset[8];    /* Location at which to apply the action */
186  unsigned char r_info[8];      /* index and type of relocation */
187} Elf64_External_Rel;
188
189typedef struct {
190  unsigned char r_offset[8];    /* Location at which to apply the action */
191  unsigned char r_info[8];      /* index and type of relocation */
192  unsigned char r_addend[8];    /* Constant addend used to compute value */
193} Elf64_External_Rela;
194
195/* dynamic section structure */
196
197typedef struct {
198  unsigned char d_tag[4];               /* entry tag value */
199  union {
200    unsigned char       d_val[4];
201    unsigned char       d_ptr[4];
202  } d_un;
203} Elf32_External_Dyn;
204
205typedef struct {
206  unsigned char d_tag[8];               /* entry tag value */
207  union {
208    unsigned char       d_val[8];
209    unsigned char       d_ptr[8];
210  } d_un;
211} Elf64_External_Dyn;
212
213/* The version structures are currently size independent.  They are
214   named without a 32 or 64.  If that ever changes, these structures
215   will need to be renamed.  */
216
217/* This structure appears in a SHT_GNU_verdef section.  */
218
219typedef struct {
220  unsigned char         vd_version[2];
221  unsigned char         vd_flags[2];
222  unsigned char         vd_ndx[2];
223  unsigned char         vd_cnt[2];
224  unsigned char         vd_hash[4];
225  unsigned char         vd_aux[4];
226  unsigned char         vd_next[4];
227} Elf_External_Verdef;
228
229/* This structure appears in a SHT_GNU_verdef section.  */
230
231typedef struct {
232  unsigned char         vda_name[4];
233  unsigned char         vda_next[4];
234} Elf_External_Verdaux;
235
236/* This structure appears in a SHT_GNU_verneed section.  */
237
238typedef struct {
239  unsigned char         vn_version[2];
240  unsigned char         vn_cnt[2];
241  unsigned char         vn_file[4];
242  unsigned char         vn_aux[4];
243  unsigned char         vn_next[4];
244} Elf_External_Verneed;
245
246/* This structure appears in a SHT_GNU_verneed section.  */
247
248typedef struct {
249  unsigned char         vna_hash[4];
250  unsigned char         vna_flags[2];
251  unsigned char         vna_other[2];
252  unsigned char         vna_name[4];
253  unsigned char         vna_next[4];
254} Elf_External_Vernaux;
255
256/* This structure appears in a SHT_GNU_versym section.  This is not a
257   standard ELF structure; ELF just uses Elf32_Half.  */
258
259typedef struct {
260  unsigned char         vs_vers[2];
261} ATTRIBUTE_PACKED  Elf_External_Versym;
262
263/* Structure for syminfo section.  */
264typedef struct
265{
266  unsigned char         si_boundto[2];
267  unsigned char         si_flags[2];
268} Elf_External_Syminfo;
269
270
271/* This structure appears on the stack and in NT_AUXV core file notes.  */
272typedef struct
273{
274  unsigned char         a_type[4];
275  unsigned char         a_val[4];
276} Elf32_External_Auxv;
277
278typedef struct
279{
280  unsigned char         a_type[8];
281  unsigned char         a_val[8];
282} Elf64_External_Auxv;
283
284/* Size of SHT_GROUP section entry.  */
285
286#define GRP_ENTRY_SIZE          4
287
288#endif /* _ELF_EXTERNAL_H */
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