1 /* HP PA-RISC SOM object file format: definitions internal to BFD.
2 Copyright (C) 1990, 91, 92, 93, 94 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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
26 #include "../bfd/sysdep.h"
34 #if defined(HOST_HPPABSD) || defined (HOST_HPPAOSF)
35 /* BSD uses a completely different scheme for object file identification.
36 so for now, define _PA_RISC_ID to accept any random value for a model
39 #define _PA_RISC_ID(__m_num) 1
40 #endif /* HOST_HPPABSD */
42 #define FILE_HDR_SIZE sizeof(struct header)
43 #define AUX_HDR_SIZE sizeof(struct som_exec_auxhdr)
45 typedef struct som_symbol
51 unsigned int som_type;
53 /* Structured like the ELF tc_data union. Allows more code sharing
57 unsigned int hppa_arg_reloc;
62 /* Index of this symbol in the symbol table. Only used when
63 building relocation streams for incomplete objects. */
66 /* How many times this symbol is used in a relocation. By sorting
67 the symbols from most used to least used we can significantly
68 reduce the size of the relocation stream for incomplete objects. */
71 /* The unwind descriptor bits associated with R_ENTRY relocations
72 for functions (not enough room in a BFD reloc to store all the
73 information, so we tack it onto the symbol associated with the
79 /* A structure containing all the magic information stored in a BFD's
80 private data which needs to be copied during an objcopy/strip run. */
83 /* Sort-of a magic number. BSD uses it to distinguish between
84 native executables and hpux executables. */
87 /* Magic exec flags. These control things like whether or not
88 null pointer dereferencing is allowed and the like. */
91 /* Add more stuff here as needed. Good examples of information
92 we might want to pass would be presumed_dp, entry_* and maybe
93 others from the file header. */
98 /* All the magic information about an executable which lives
99 in the private BFD structure and needs to be copied from
100 the input bfd to the output bfd during a objcopy/strip. */
101 struct som_exec_data *exec_data;
103 /* These three fields are only used when writing files and are
104 generated from scratch. They need not be copied for objcopy
106 struct header *file_hdr;
107 struct copyright_aux_hdr *copyright_aux_hdr;
108 struct user_string_aux_hdr *version_aux_hdr;
110 /* Pointers to a saved copy of the symbol and string tables. These
111 need not be copied for objcopy or strip to work. */
112 som_symbol_type *symtab;
115 /* We remember these offsets so that after check_file_format, we have
116 no dependencies on the particular format of the exec_hdr.
117 These offsets need not be copied for objcopy or strip to work. */
119 file_ptr sym_filepos;
120 file_ptr str_filepos;
121 file_ptr reloc_filepos;
122 unsigned stringtab_size;
125 struct som_data_struct
130 /* Substructure of som_section_data_struct used to hold information
131 which can't be represented by the generic BFD section structure,
132 but which must be copied during objcopy or strip. */
133 struct som_copyable_section_data_struct
135 /* Various fields in space and subspace headers that we need
137 unsigned int sort_key : 8;
138 unsigned int access_control_bits : 7;
139 unsigned int is_defined : 1;
140 unsigned int is_private : 1;
141 unsigned int quadrant : 2;
143 /* For subspaces, this points to the section which represents the
144 space in which the subspace is contained. For spaces it points
145 back to the section for this space. */
148 /* The user-specified space number. It is wrong to use this as
149 an index since duplicates and holes are allowed. */
152 /* Add more stuff here as needed. Good examples of information
153 we might want to pass would be initialization pointers,
154 and the many subspace flags we do not represent yet. */
157 /* Used to keep extra SOM specific information for a given section.
159 reloc_size holds the size of the relocation stream, note this
160 is very different from the number of relocations as SOM relocations
163 reloc_stream is the actual stream of relocation entries. */
165 struct som_section_data_struct
167 struct som_copyable_section_data_struct *copy_data;
168 unsigned int reloc_size;
170 struct space_dictionary_record *space_dict;
171 struct subspace_dictionary_record *subspace_dict;
174 #define somdata(bfd) ((bfd)->tdata.som_data->a)
175 #define obj_som_exec_data(bfd) (somdata(bfd).exec_data)
176 #define obj_som_file_hdr(bfd) (somdata(bfd).file_hdr)
177 #define obj_som_copyright_hdr(bfd) (somdata(bfd).copyright_aux_hdr)
178 #define obj_som_version_hdr(bfd) (somdata(bfd).version_aux_hdr)
179 #define obj_som_symtab(bfd) (somdata(bfd).symtab)
180 #define obj_som_stringtab(bfd) (somdata(bfd).stringtab)
181 #define obj_som_sym_filepos(bfd) (somdata(bfd).sym_filepos)
182 #define obj_som_str_filepos(bfd) (somdata(bfd).str_filepos)
183 #define obj_som_stringtab_size(bfd) (somdata(bfd).stringtab_size)
184 #define obj_som_reloc_filepos(bfd) (somdata(bfd).reloc_filepos)
185 #define som_section_data(sec) \
186 ((struct som_section_data_struct *)sec->used_by_bfd)
187 #define som_symbol_data(symbol) ((som_symbol_type *) symbol)
190 /* Defines groups of basic relocations. FIXME: These should
191 be the only basic relocations created by GAS. The rest
192 should be internal to the BFD backend.
194 The idea is both SOM and ELF define these basic relocation
195 types so they map into a SOM or ELF specific reloation as
196 appropriate. This allows GAS to share much more code
197 between the two object formats. */
199 #define R_HPPA_NONE R_NO_RELOCATION
200 #define R_HPPA R_CODE_ONE_SYMBOL
201 #define R_HPPA_PCREL_CALL R_PCREL_CALL
202 #define R_HPPA_GOTOFF R_DP_RELATIVE
203 #define R_HPPA_ENTRY R_ENTRY
204 #define R_HPPA_EXIT R_EXIT
206 /* Exported functions, mostly for use by GAS. */
207 boolean bfd_som_set_section_attributes PARAMS ((asection *, int, int,
209 boolean bfd_som_set_subsection_attributes PARAMS ((asection *, asection *,
210 int, unsigned int, int));
211 void bfd_som_set_symbol_type PARAMS ((asymbol *, unsigned int));
212 void bfd_som_attach_unwind_info PARAMS ((asymbol *, char *));
213 boolean bfd_som_attach_aux_hdr PARAMS ((bfd *, int, char *));
214 int ** hppa_som_gen_reloc_type
215 PARAMS ((bfd *, int, int, enum hppa_reloc_field_selector_type_alt));