1 /* HP PA-RISC SOM object file format: definitions internal to BFD.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 2000
3 Free Software Foundation, Inc.
5 Contributed by the Center for Software Science at the
6 University of Utah (pa-gdb-bugs@cs.utah.edu).
8 This file is part of BFD, the Binary File Descriptor library.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
34 /* The SOM BFD backend doesn't currently use anything from these
35 two include files, but it's likely to need them in the future. */
41 #if defined(HOST_HPPABSD) || defined (HOST_HPPAOSF)
42 /* BSD uses a completely different scheme for object file identification.
43 so for now, define _PA_RISC_ID to accept any random value for a model
46 #define _PA_RISC_ID(__m_num) 1
47 #endif /* HOST_HPPABSD */
49 #define FILE_HDR_SIZE sizeof (struct header)
50 #define AUX_HDR_SIZE sizeof (struct som_exec_auxhdr)
52 typedef struct som_symbol
55 unsigned int som_type;
57 /* Structured like the ELF tc_data union. Allows more code sharing
63 unsigned int hppa_arg_reloc;
64 unsigned int hppa_priv_level;
70 /* Index of this symbol in the symbol table. Only used when
71 building relocation streams for incomplete objects. */
74 /* How many times this symbol is used in a relocation. By sorting
75 the symbols from most used to least used we can significantly
76 reduce the size of the relocation stream for incomplete objects. */
79 /* During object file writing, the offset of the name of this symbol
80 in the SOM string table. */
85 /* A structure containing all the magic information stored in a BFD's
86 private data which needs to be copied during an objcopy/strip run. */
89 /* Sort-of a magic number. BSD uses it to distinguish between
90 native executables and hpux executables. */
93 /* Magic exec flags. These control things like whether or not
94 null pointer dereferencing is allowed and the like. */
97 /* We must preserve the version identifier too. Some versions
98 of the HP linker do not grok NEW_VERSION_ID for reasons unknown. */
99 unsigned int version_id;
101 /* Add more stuff here as needed. Good examples of information
102 we might want to pass would be presumed_dp, entry_* and maybe
103 others from the file header. */
108 /* All the magic information about an executable which lives
109 in the private BFD structure and needs to be copied from
110 the input bfd to the output bfd during an objcopy/strip. */
111 struct som_exec_data *exec_data;
113 /* These three fields are only used when writing files and are
114 generated from scratch. They need not be copied for objcopy
116 struct header *file_hdr;
117 struct copyright_aux_hdr *copyright_aux_hdr;
118 struct user_string_aux_hdr *version_aux_hdr;
119 struct som_exec_auxhdr *exec_hdr;
122 /* Pointers to a saved copy of the symbol and string tables. These
123 need not be copied for objcopy or strip to work. */
124 som_symbol_type *symtab;
126 asymbol **sorted_syms;
128 /* We remember these offsets so that after check_file_format, we have
129 no dependencies on the particular format of the exec_hdr.
130 These offsets need not be copied for objcopy or strip to work. */
132 file_ptr sym_filepos;
133 file_ptr str_filepos;
134 file_ptr reloc_filepos;
135 unsigned stringtab_size;
138 struct som_data_struct
143 /* Substructure of som_section_data_struct used to hold information
144 which can't be represented by the generic BFD section structure,
145 but which must be copied during objcopy or strip. */
146 struct som_copyable_section_data_struct
148 /* Various fields in space and subspace headers that we need
150 unsigned int sort_key : 8;
151 unsigned int access_control_bits : 7;
152 unsigned int is_defined : 1;
153 unsigned int is_private : 1;
154 unsigned int quadrant : 2;
156 /* For subspaces, this points to the section which represents the
157 space in which the subspace is contained. For spaces it points
158 back to the section for this space. */
161 /* The user-specified space number. It is wrong to use this as
162 an index since duplicates and holes are allowed. */
165 /* Add more stuff here as needed. Good examples of information
166 we might want to pass would be initialization pointers,
167 and the many subspace flags we do not represent yet. */
170 /* Used to keep extra SOM specific information for a given section.
172 reloc_size holds the size of the relocation stream, note this
173 is very different from the number of relocations as SOM relocations
176 reloc_stream is the actual stream of relocation entries. */
178 struct som_section_data_struct
180 struct som_copyable_section_data_struct *copy_data;
181 unsigned int reloc_size;
183 struct space_dictionary_record *space_dict;
184 struct subspace_dictionary_record *subspace_dict;
187 #define somdata(bfd) ((bfd)->tdata.som_data->a)
188 #define obj_som_exec_data(bfd) (somdata(bfd).exec_data)
189 #define obj_som_file_hdr(bfd) (somdata(bfd).file_hdr)
190 #define obj_som_exec_hdr(bfd) (somdata(bfd).exec_hdr)
191 #define obj_som_copyright_hdr(bfd) (somdata(bfd).copyright_aux_hdr)
192 #define obj_som_version_hdr(bfd) (somdata(bfd).version_aux_hdr)
193 #define obj_som_compilation_unit(bfd) (somdata(bfd).comp_unit)
194 #define obj_som_symtab(bfd) (somdata(bfd).symtab)
195 #define obj_som_stringtab(bfd) (somdata(bfd).stringtab)
196 #define obj_som_sym_filepos(bfd) (somdata(bfd).sym_filepos)
197 #define obj_som_str_filepos(bfd) (somdata(bfd).str_filepos)
198 #define obj_som_stringtab_size(bfd) (somdata(bfd).stringtab_size)
199 #define obj_som_reloc_filepos(bfd) (somdata(bfd).reloc_filepos)
200 #define obj_som_sorted_syms(bfd) (somdata(bfd).sorted_syms)
201 #define som_section_data(sec) \
202 ((struct som_section_data_struct *)sec->used_by_bfd)
203 #define som_symbol_data(symbol) ((som_symbol_type *) symbol)
205 /* Defines groups of basic relocations. FIXME: These should
206 be the only basic relocations created by GAS. The rest
207 should be internal to the BFD backend.
209 The idea is both SOM and ELF define these basic relocation
210 types so they map into a SOM or ELF specific reloation as
211 appropriate. This allows GAS to share much more code
212 between the two object formats. */
214 #define R_HPPA_NONE R_NO_RELOCATION
215 #define R_HPPA R_CODE_ONE_SYMBOL
216 #define R_HPPA_PCREL_CALL R_PCREL_CALL
217 #define R_HPPA_ABS_CALL R_ABS_CALL
218 #define R_HPPA_GOTOFF R_DP_RELATIVE
219 #define R_HPPA_ENTRY R_ENTRY
220 #define R_HPPA_EXIT R_EXIT
221 #define R_HPPA_COMPLEX R_COMP1
222 #define R_HPPA_BEGIN_BRTAB R_BEGIN_BRTAB
223 #define R_HPPA_END_BRTAB R_END_BRTAB
224 #define R_HPPA_BEGIN_TRY R_BEGIN_TRY
225 #define R_HPPA_END_TRY R_END_TRY
227 /* Exported functions, mostly for use by GAS. */
228 boolean bfd_som_set_section_attributes PARAMS ((asection *, int, int,
230 boolean bfd_som_set_subsection_attributes PARAMS ((asection *, asection *,
231 int, unsigned int, int));
232 void bfd_som_set_symbol_type PARAMS ((asymbol *, unsigned int));
233 boolean bfd_som_attach_aux_hdr PARAMS ((bfd *, int, char *));
234 int ** hppa_som_gen_reloc_type
235 PARAMS ((bfd *, int, int, enum hppa_reloc_field_selector_type_alt,
237 boolean bfd_som_attach_compilation_unit
238 PARAMS ((bfd *, const char *, const char *, const char *, const char *));