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176ed088 | 1 | /* HP PA-RISC SOM object file format: definitions internal to BFD. |
4359a7ef | 2 | Copyright (C) 1990, 91, 92, 93, 94 Free Software Foundation, Inc. |
176ed088 JL |
3 | |
4 | Contributed by the Center for Software Science at the | |
5 | University of Utah (pa-gdb-bugs@cs.utah.edu). | |
6 | ||
7 | This file is part of BFD, the Binary File Descriptor library. | |
8 | ||
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. | |
13 | ||
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. | |
18 | ||
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. */ | |
22 | ||
23 | #ifndef _SOM_H | |
24 | #define _SOM_H | |
25 | ||
26 | #include "../bfd/sysdep.h" | |
4e64845c | 27 | #include "libhppa.h" |
176ed088 JL |
28 | |
29 | #include <a.out.h> | |
6863eb4b JL |
30 | #include <lst.h> |
31 | #include <ar.h> | |
176ed088 JL |
32 | |
33 | ||
7b5f6e48 | 34 | #if defined(HOST_HPPABSD) || defined (HOST_HPPAOSF) |
176ed088 JL |
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 | |
37 | number. */ | |
38 | #undef _PA_RISC_ID | |
39 | #define _PA_RISC_ID(__m_num) 1 | |
40 | #endif /* HOST_HPPABSD */ | |
41 | ||
42 | #define FILE_HDR_SIZE sizeof(struct header) | |
43 | #define AUX_HDR_SIZE sizeof(struct som_exec_auxhdr) | |
44 | ||
45 | typedef struct som_symbol | |
46 | { | |
47 | asymbol symbol; | |
176ed088 JL |
48 | unsigned int som_type; |
49 | ||
50 | /* Structured like the ELF tc_data union. Allows more code sharing | |
51 | in GAS this way. */ | |
52 | union | |
53 | { | |
54 | unsigned int hppa_arg_reloc; | |
55 | PTR any; | |
56 | } | |
57 | tc_data; | |
58 | ||
59 | /* Index of this symbol in the symbol table. Only used when | |
60 | building relocation streams for incomplete objects. */ | |
61 | int index; | |
62 | ||
63 | /* How many times this symbol is used in a relocation. By sorting | |
64 | the symbols from most used to least used we can significantly | |
65 | reduce the size of the relocation stream for incomplete objects. */ | |
66 | int reloc_count; | |
67 | ||
68 | /* The unwind descriptor bits associated with R_ENTRY relocations | |
69 | for functions (not enough room in a BFD reloc to store all the | |
70 | information, so we tack it onto the symbol associated with the | |
71 | function. */ | |
72 | char *unwind; | |
73 | } | |
74 | som_symbol_type; | |
75 | ||
4359a7ef JL |
76 | /* A structure containing all the magic information stored in a BFD's |
77 | private data which needs to be copied during an objcopy/strip run. */ | |
78 | struct som_exec_data | |
79 | { | |
80 | /* Sort-of a magic number. BSD uses it to distinguish between | |
81 | native executables and hpux executables. */ | |
82 | short system_id; | |
83 | ||
84 | /* Magic exec flags. These control things like whether or not | |
85 | null pointer dereferencing is allowed and the like. */ | |
86 | long exec_flags; | |
87 | ||
88 | /* Add more stuff here as needed. Good examples of information | |
89 | we might want to pass would be presumed_dp, entry_* and maybe | |
90 | others from the file header. */ | |
91 | }; | |
92 | ||
176ed088 JL |
93 | struct somdata |
94 | { | |
4359a7ef JL |
95 | /* All the magic information about an executable which lives |
96 | in the private BFD structure and needs to be copied from | |
97 | the input bfd to the output bfd during a objcopy/strip. */ | |
98 | struct som_exec_data *exec_data; | |
99 | ||
100 | /* These three fields are only used when writing files and are | |
101 | generated from scratch. They need not be copied for objcopy | |
102 | or strip to work. */ | |
176ed088 | 103 | struct header *file_hdr; |
6863eb4b JL |
104 | struct copyright_aux_hdr *copyright_aux_hdr; |
105 | struct user_string_aux_hdr *version_aux_hdr; | |
39836432 | 106 | struct som_exec_auxhdr *exec_hdr; |
4359a7ef JL |
107 | |
108 | /* Pointers to a saved copy of the symbol and string tables. These | |
109 | need not be copied for objcopy or strip to work. */ | |
176ed088 JL |
110 | som_symbol_type *symtab; |
111 | char *stringtab; | |
112 | ||
113 | /* We remember these offsets so that after check_file_format, we have | |
4359a7ef JL |
114 | no dependencies on the particular format of the exec_hdr. |
115 | These offsets need not be copied for objcopy or strip to work. */ | |
176ed088 JL |
116 | |
117 | file_ptr sym_filepos; | |
118 | file_ptr str_filepos; | |
119 | file_ptr reloc_filepos; | |
176ed088 JL |
120 | unsigned stringtab_size; |
121 | }; | |
122 | ||
123 | struct som_data_struct | |
124 | { | |
125 | struct somdata a; | |
126 | }; | |
127 | ||
459ae909 JL |
128 | /* Substructure of som_section_data_struct used to hold information |
129 | which can't be represented by the generic BFD section structure, | |
130 | but which must be copied during objcopy or strip. */ | |
131 | struct som_copyable_section_data_struct | |
132 | { | |
133 | /* Various fields in space and subspace headers that we need | |
134 | to pass around. */ | |
135 | unsigned int sort_key : 8; | |
136 | unsigned int access_control_bits : 7; | |
137 | unsigned int is_defined : 1; | |
138 | unsigned int is_private : 1; | |
139 | unsigned int quadrant : 2; | |
140 | ||
141 | /* For subspaces, this points to the section which represents the | |
142 | space in which the subspace is contained. For spaces it points | |
143 | back to the section for this space. */ | |
144 | asection *container; | |
145 | ||
146 | /* The user-specified space number. It is wrong to use this as | |
147 | an index since duplicates and holes are allowed. */ | |
148 | int space_number; | |
149 | ||
150 | /* Add more stuff here as needed. Good examples of information | |
151 | we might want to pass would be initialization pointers, | |
152 | and the many subspace flags we do not represent yet. */ | |
153 | }; | |
154 | ||
176ed088 JL |
155 | /* Used to keep extra SOM specific information for a given section. |
156 | ||
157 | reloc_size holds the size of the relocation stream, note this | |
158 | is very different from the number of relocations as SOM relocations | |
159 | are variable length. | |
160 | ||
459ae909 | 161 | reloc_stream is the actual stream of relocation entries. */ |
176ed088 JL |
162 | |
163 | struct som_section_data_struct | |
164 | { | |
459ae909 | 165 | struct som_copyable_section_data_struct *copy_data; |
176ed088 JL |
166 | unsigned int reloc_size; |
167 | char *reloc_stream; | |
459ae909 JL |
168 | struct space_dictionary_record *space_dict; |
169 | struct subspace_dictionary_record *subspace_dict; | |
176ed088 JL |
170 | }; |
171 | ||
172 | #define somdata(bfd) ((bfd)->tdata.som_data->a) | |
4359a7ef | 173 | #define obj_som_exec_data(bfd) (somdata(bfd).exec_data) |
176ed088 | 174 | #define obj_som_file_hdr(bfd) (somdata(bfd).file_hdr) |
39836432 | 175 | #define obj_som_exec_hdr(bfd) (somdata(bfd).exec_hdr) |
6863eb4b JL |
176 | #define obj_som_copyright_hdr(bfd) (somdata(bfd).copyright_aux_hdr) |
177 | #define obj_som_version_hdr(bfd) (somdata(bfd).version_aux_hdr) | |
176ed088 JL |
178 | #define obj_som_symtab(bfd) (somdata(bfd).symtab) |
179 | #define obj_som_stringtab(bfd) (somdata(bfd).stringtab) | |
180 | #define obj_som_sym_filepos(bfd) (somdata(bfd).sym_filepos) | |
181 | #define obj_som_str_filepos(bfd) (somdata(bfd).str_filepos) | |
182 | #define obj_som_stringtab_size(bfd) (somdata(bfd).stringtab_size) | |
183 | #define obj_som_reloc_filepos(bfd) (somdata(bfd).reloc_filepos) | |
184 | #define som_section_data(sec) \ | |
185 | ((struct som_section_data_struct *)sec->used_by_bfd) | |
459ae909 | 186 | #define som_symbol_data(symbol) ((som_symbol_type *) symbol) |
176ed088 JL |
187 | |
188 | ||
189 | /* Defines groups of basic relocations. FIXME: These should | |
190 | be the only basic relocations created by GAS. The rest | |
191 | should be internal to the BFD backend. | |
192 | ||
193 | The idea is both SOM and ELF define these basic relocation | |
194 | types so they map into a SOM or ELF specific reloation as | |
195 | appropriate. This allows GAS to share much more code | |
196 | between the two object formats. */ | |
197 | ||
198 | #define R_HPPA_NONE R_NO_RELOCATION | |
199 | #define R_HPPA R_CODE_ONE_SYMBOL | |
176ed088 | 200 | #define R_HPPA_PCREL_CALL R_PCREL_CALL |
edf7c1e4 | 201 | #define R_HPPA_ABS_CALL R_ABS_CALL |
176ed088 | 202 | #define R_HPPA_GOTOFF R_DP_RELATIVE |
176ed088 JL |
203 | #define R_HPPA_ENTRY R_ENTRY |
204 | #define R_HPPA_EXIT R_EXIT | |
39836432 | 205 | #define R_HPPA_COMPLEX R_COMP1 |
176ed088 | 206 | |
6863eb4b | 207 | /* Exported functions, mostly for use by GAS. */ |
459ae909 JL |
208 | boolean bfd_som_set_section_attributes PARAMS ((asection *, int, int, |
209 | unsigned int, int)); | |
210 | boolean bfd_som_set_subsection_attributes PARAMS ((asection *, asection *, | |
211 | int, unsigned int, int)); | |
6863eb4b JL |
212 | void bfd_som_set_symbol_type PARAMS ((asymbol *, unsigned int)); |
213 | void bfd_som_attach_unwind_info PARAMS ((asymbol *, char *)); | |
44fd6622 JL |
214 | boolean bfd_som_attach_aux_hdr PARAMS ((bfd *, int, char *)); |
215 | int ** hppa_som_gen_reloc_type | |
216 | PARAMS ((bfd *, int, int, enum hppa_reloc_field_selector_type_alt)); | |
176ed088 | 217 | #endif /* _SOM_H */ |