1 /* HP PA-RISC SOM object file format: definitions internal to BFD.
2 Copyright (C) 1990-2017 Free Software Foundation, Inc.
4 Contributed by the Center for Software Science at the
5 University of Utah (pa-gdb-bugs@cs.utah.edu).
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
29 /* We want reloc.h to provide PA 2.0 defines. */
34 #include "som/internal.h"
36 /* The SOM BFD backend doesn't currently use anything from these
37 two include files, but it's likely to need them in the future. */
47 #if defined (HOST_HPPABSD) || defined (HOST_HPPAOSF)
48 /* BSD uses a completely different scheme for object file identification.
49 so for now, define _PA_RISC_ID to accept any random value for a model
52 #define _PA_RISC_ID(__m_num) 1
53 #endif /* HOST_HPPABSD */
55 typedef struct som_symbol
58 unsigned int som_type
;
60 /* Structured like the ELF tc_data union. Allows more code sharing
66 unsigned int hppa_arg_reloc
;
67 unsigned int hppa_priv_level
;
73 /* Index of this symbol in the symbol table. Only used when
74 building relocation streams for incomplete objects. */
77 /* How many times this symbol is used in a relocation. By sorting
78 the symbols from most used to least used we can significantly
79 reduce the size of the relocation stream for incomplete objects. */
82 /* During object file writing, the offset of the name of this symbol
83 in the SOM string table. */
88 /* A structure containing all the magic information stored in a BFD's
89 private data which needs to be copied during an objcopy/strip run. */
92 /* Sort-of a magic number. BSD uses it to distinguish between
93 native executables and hpux executables. */
96 /* Magic exec flags. These control things like whether or not
97 null pointer dereferencing is allowed and the like. */
100 /* We must preserve the version identifier too. Some versions
101 of the HP linker do not grok NEW_VERSION_ID for reasons unknown. */
102 unsigned int version_id
;
104 /* Add more stuff here as needed. Good examples of information
105 we might want to pass would be presumed_dp, entry_* and maybe
106 others from the file header. */
111 /* All the magic information about an executable which lives
112 in the private BFD structure and needs to be copied from
113 the input bfd to the output bfd during an objcopy/strip. */
114 struct som_exec_data
*exec_data
;
116 /* These three fields are only used when writing files and are
117 generated from scratch. They need not be copied for objcopy
119 struct som_header
*file_hdr
;
120 struct som_string_auxhdr
*copyright_aux_hdr
;
121 struct som_string_auxhdr
*version_aux_hdr
;
122 struct som_exec_auxhdr
*exec_hdr
;
123 struct som_compilation_unit
*comp_unit
;
125 /* Pointers to a saved copy of the symbol and string tables. These
126 need not be copied for objcopy or strip to work. */
127 som_symbol_type
*symtab
;
129 asymbol
**sorted_syms
;
131 /* We remember these offsets so that after check_file_format, we have
132 no dependencies on the particular format of the exec_hdr.
133 These offsets need not be copied for objcopy or strip to work. */
135 file_ptr sym_filepos
;
136 file_ptr str_filepos
;
137 file_ptr reloc_filepos
;
138 unsigned stringtab_size
;
142 struct som_data_struct
147 /* Substructure of som_section_data_struct used to hold information
148 which can't be represented by the generic BFD section structure,
149 but which must be copied during objcopy or strip. */
150 struct som_copyable_section_data_struct
152 /* Various fields in space and subspace headers that we need
154 unsigned int sort_key
: 8;
155 unsigned int access_control_bits
: 7;
156 unsigned int is_defined
: 1;
157 unsigned int is_private
: 1;
158 unsigned int quadrant
: 2;
159 unsigned int is_comdat
: 1;
160 unsigned int is_common
: 1;
161 unsigned int dup_common
: 1;
163 /* For subspaces, this points to the section which represents the
164 space in which the subspace is contained. For spaces it points
165 back to the section for this space. */
168 /* The user-specified space number. It is wrong to use this as
169 an index since duplicates and holes are allowed. */
172 /* Add more stuff here as needed. Good examples of information
173 we might want to pass would be initialization pointers,
174 and the many subspace flags we do not represent yet. */
177 /* Used to keep extra SOM specific information for a given section.
179 reloc_size holds the size of the relocation stream, note this
180 is very different from the number of relocations as SOM relocations
183 reloc_stream is the actual stream of relocation entries. */
185 struct som_section_data_struct
187 struct som_copyable_section_data_struct
*copy_data
;
188 unsigned int reloc_size
;
189 unsigned char *reloc_stream
;
190 struct som_space_dictionary_record
*space_dict
;
191 struct som_subspace_dictionary_record
*subspace_dict
;
194 #define somdata(bfd) ((bfd)->tdata.som_data->a)
195 #define obj_som_exec_data(bfd) (somdata (bfd).exec_data)
196 #define obj_som_file_hdr(bfd) (somdata (bfd).file_hdr)
197 #define obj_som_exec_hdr(bfd) (somdata (bfd).exec_hdr)
198 #define obj_som_copyright_hdr(bfd) (somdata (bfd).copyright_aux_hdr)
199 #define obj_som_version_hdr(bfd) (somdata (bfd).version_aux_hdr)
200 #define obj_som_compilation_unit(bfd) (somdata (bfd).comp_unit)
201 #define obj_som_symtab(bfd) (somdata (bfd).symtab)
202 #define obj_som_stringtab(bfd) (somdata (bfd).stringtab)
203 #define obj_som_sym_filepos(bfd) (somdata (bfd).sym_filepos)
204 #define obj_som_str_filepos(bfd) (somdata (bfd).str_filepos)
205 #define obj_som_stringtab_size(bfd) (somdata (bfd).stringtab_size)
206 #define obj_som_reloc_filepos(bfd) (somdata (bfd).reloc_filepos)
207 #define obj_som_sorted_syms(bfd) (somdata (bfd).sorted_syms)
208 #define som_section_data(sec) ((struct som_section_data_struct *) sec->used_by_bfd)
209 #define som_symbol_data(symbol) ((som_symbol_type *) symbol)
211 /* Defines groups of basic relocations. FIXME: These should
212 be the only basic relocations created by GAS. The rest
213 should be internal to the BFD backend.
215 The idea is both SOM and ELF define these basic relocation
216 types so they map into a SOM or ELF specific relocation as
217 appropriate. This allows GAS to share much more code
218 between the two object formats. */
220 #define R_HPPA_NONE R_NO_RELOCATION
221 #define R_HPPA R_CODE_ONE_SYMBOL
222 #define R_HPPA_PCREL_CALL R_PCREL_CALL
223 #define R_HPPA_ABS_CALL R_ABS_CALL
224 #define R_HPPA_GOTOFF R_DP_RELATIVE
225 #define R_HPPA_ENTRY R_ENTRY
226 #define R_HPPA_EXIT R_EXIT
227 #define R_HPPA_COMPLEX R_COMP1
228 #define R_HPPA_BEGIN_BRTAB R_BEGIN_BRTAB
229 #define R_HPPA_END_BRTAB R_END_BRTAB
230 #define R_HPPA_BEGIN_TRY R_BEGIN_TRY
231 #define R_HPPA_END_TRY R_END_TRY
233 /* Exported functions, mostly for use by GAS. */
234 bfd_boolean
bfd_som_set_section_attributes (asection
*, int, int, unsigned int, int);
235 bfd_boolean
bfd_som_set_subsection_attributes (asection
*, asection
*, int, unsigned int, int, int, int, int);
236 void bfd_som_set_symbol_type (asymbol
*, unsigned int);
237 bfd_boolean
bfd_som_attach_aux_hdr (bfd
*, int, char *);
238 int ** hppa_som_gen_reloc_type (bfd
*, int, int, enum hppa_reloc_field_selector_type_alt
, int, asymbol
*);
239 bfd_boolean
bfd_som_attach_compilation_unit (bfd
*, const char *, const char *, const char *, const char *);
240 asection
* bfd_section_from_som_symbol (bfd
*abfd
, struct som_external_symbol_dictionary_record
*symbol
);