1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
|
/* HP PA-RISC SOM object file format: definitions internal to BFD.
Copyright (C) 1990-2017 Free Software Foundation, Inc.
Contributed by the Center for Software Science at the
University of Utah (pa-gdb-bugs@cs.utah.edu).
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 3 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. */
#ifndef _SOM_H
#define _SOM_H
#include "libhppa.h"
/* We want reloc.h to provide PA 2.0 defines. */
#define PA_2_0
#include "som/aout.h"
#include "som/lst.h"
#include "som/internal.h"
/* The SOM BFD backend doesn't currently use anything from these
two include files, but it's likely to need them in the future. */
#ifdef R_DLT_REL
#include <shl.h>
#include <dl.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
#if defined (HOST_HPPABSD) || defined (HOST_HPPAOSF)
/* BSD uses a completely different scheme for object file identification.
so for now, define _PA_RISC_ID to accept any random value for a model
number. */
#undef _PA_RISC_ID
#define _PA_RISC_ID(__m_num) 1
#endif /* HOST_HPPABSD */
typedef struct som_symbol
{
asymbol symbol;
unsigned int som_type;
/* Structured like the ELF tc_data union. Allows more code sharing
in GAS this way. */
union
{
struct
{
unsigned int hppa_arg_reloc;
unsigned int hppa_priv_level;
} ap;
void * any;
}
tc_data;
/* Index of this symbol in the symbol table. Only used when
building relocation streams for incomplete objects. */
int index;
/* How many times this symbol is used in a relocation. By sorting
the symbols from most used to least used we can significantly
reduce the size of the relocation stream for incomplete objects. */
int reloc_count;
/* During object file writing, the offset of the name of this symbol
in the SOM string table. */
int stringtab_offset;
}
som_symbol_type;
/* A structure containing all the magic information stored in a BFD's
private data which needs to be copied during an objcopy/strip run. */
struct som_exec_data
{
/* Sort-of a magic number. BSD uses it to distinguish between
native executables and hpux executables. */
short system_id;
/* Magic exec flags. These control things like whether or not
null pointer dereferencing is allowed and the like. */
long exec_flags;
/* We must preserve the version identifier too. Some versions
of the HP linker do not grok NEW_VERSION_ID for reasons unknown. */
unsigned int version_id;
/* Add more stuff here as needed. Good examples of information
we might want to pass would be presumed_dp, entry_* and maybe
others from the file header. */
};
struct somdata
{
/* All the magic information about an executable which lives
in the private BFD structure and needs to be copied from
the input bfd to the output bfd during an objcopy/strip. */
struct som_exec_data *exec_data;
/* These three fields are only used when writing files and are
generated from scratch. They need not be copied for objcopy
or strip to work. */
struct som_header *file_hdr;
struct som_string_auxhdr *copyright_aux_hdr;
struct som_string_auxhdr *version_aux_hdr;
struct som_exec_auxhdr *exec_hdr;
struct som_compilation_unit *comp_unit;
/* Pointers to a saved copy of the symbol and string tables. These
need not be copied for objcopy or strip to work. */
som_symbol_type *symtab;
char *stringtab;
asymbol **sorted_syms;
/* We remember these offsets so that after check_file_format, we have
no dependencies on the particular format of the exec_hdr.
These offsets need not be copied for objcopy or strip to work. */
file_ptr sym_filepos;
file_ptr str_filepos;
file_ptr reloc_filepos;
unsigned stringtab_size;
void * line_info;
};
struct som_data_struct
{
struct somdata a;
};
/* Substructure of som_section_data_struct used to hold information
which can't be represented by the generic BFD section structure,
but which must be copied during objcopy or strip. */
struct som_copyable_section_data_struct
{
/* Various fields in space and subspace headers that we need
to pass around. */
unsigned int sort_key : 8;
unsigned int access_control_bits : 7;
unsigned int is_defined : 1;
unsigned int is_private : 1;
unsigned int quadrant : 2;
unsigned int is_comdat : 1;
unsigned int is_common : 1;
unsigned int dup_common : 1;
/* For subspaces, this points to the section which represents the
space in which the subspace is contained. For spaces it points
back to the section for this space. */
asection *container;
/* The user-specified space number. It is wrong to use this as
an index since duplicates and holes are allowed. */
int space_number;
/* Add more stuff here as needed. Good examples of information
we might want to pass would be initialization pointers,
and the many subspace flags we do not represent yet. */
};
/* Used to keep extra SOM specific information for a given section.
reloc_size holds the size of the relocation stream, note this
is very different from the number of relocations as SOM relocations
are variable length.
reloc_stream is the actual stream of relocation entries. */
struct som_section_data_struct
{
struct som_copyable_section_data_struct *copy_data;
unsigned int reloc_size;
unsigned char *reloc_stream;
struct som_space_dictionary_record *space_dict;
struct som_subspace_dictionary_record *subspace_dict;
};
#define somdata(bfd) ((bfd)->tdata.som_data->a)
#define obj_som_exec_data(bfd) (somdata (bfd).exec_data)
#define obj_som_file_hdr(bfd) (somdata (bfd).file_hdr)
#define obj_som_exec_hdr(bfd) (somdata (bfd).exec_hdr)
#define obj_som_copyright_hdr(bfd) (somdata (bfd).copyright_aux_hdr)
#define obj_som_version_hdr(bfd) (somdata (bfd).version_aux_hdr)
#define obj_som_compilation_unit(bfd) (somdata (bfd).comp_unit)
#define obj_som_symtab(bfd) (somdata (bfd).symtab)
#define obj_som_stringtab(bfd) (somdata (bfd).stringtab)
#define obj_som_sym_filepos(bfd) (somdata (bfd).sym_filepos)
#define obj_som_str_filepos(bfd) (somdata (bfd).str_filepos)
#define obj_som_stringtab_size(bfd) (somdata (bfd).stringtab_size)
#define obj_som_reloc_filepos(bfd) (somdata (bfd).reloc_filepos)
#define obj_som_sorted_syms(bfd) (somdata (bfd).sorted_syms)
#define som_section_data(sec) ((struct som_section_data_struct *) sec->used_by_bfd)
#define som_symbol_data(symbol) ((som_symbol_type *) symbol)
/* Defines groups of basic relocations. FIXME: These should
be the only basic relocations created by GAS. The rest
should be internal to the BFD backend.
The idea is both SOM and ELF define these basic relocation
types so they map into a SOM or ELF specific relocation as
appropriate. This allows GAS to share much more code
between the two object formats. */
#define R_HPPA_NONE R_NO_RELOCATION
#define R_HPPA R_CODE_ONE_SYMBOL
#define R_HPPA_PCREL_CALL R_PCREL_CALL
#define R_HPPA_ABS_CALL R_ABS_CALL
#define R_HPPA_GOTOFF R_DP_RELATIVE
#define R_HPPA_ENTRY R_ENTRY
#define R_HPPA_EXIT R_EXIT
#define R_HPPA_COMPLEX R_COMP1
#define R_HPPA_BEGIN_BRTAB R_BEGIN_BRTAB
#define R_HPPA_END_BRTAB R_END_BRTAB
#define R_HPPA_BEGIN_TRY R_BEGIN_TRY
#define R_HPPA_END_TRY R_END_TRY
/* Exported functions, mostly for use by GAS. */
bfd_boolean bfd_som_set_section_attributes (asection *, int, int, unsigned int, int);
bfd_boolean bfd_som_set_subsection_attributes (asection *, asection *, int, unsigned int, int, int, int, int);
void bfd_som_set_symbol_type (asymbol *, unsigned int);
bfd_boolean bfd_som_attach_aux_hdr (bfd *, int, char *);
int ** hppa_som_gen_reloc_type (bfd *, int, int, enum hppa_reloc_field_selector_type_alt, int, asymbol *);
bfd_boolean bfd_som_attach_compilation_unit (bfd *, const char *, const char *, const char *, const char *);
asection * bfd_section_from_som_symbol (bfd *abfd, struct som_external_symbol_dictionary_record *symbol);
#ifdef __cplusplus
}
#endif
#endif /* _SOM_H */
|
