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176ed088 JL |
1 | /* HP PA-RISC SOM object file format: definitions internal to BFD. |
2 | Copyright (C) 1990-1991 Free Software Foundation, Inc. | |
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 | ||
34 | #ifdef HOST_HPPABSD | |
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; | |
48 | short desc; | |
49 | char other; | |
50 | unsigned char type; | |
51 | unsigned int som_type; | |
52 | ||
53 | /* Structured like the ELF tc_data union. Allows more code sharing | |
54 | in GAS this way. */ | |
55 | union | |
56 | { | |
57 | unsigned int hppa_arg_reloc; | |
58 | PTR any; | |
59 | } | |
60 | tc_data; | |
61 | ||
62 | /* Index of this symbol in the symbol table. Only used when | |
63 | building relocation streams for incomplete objects. */ | |
64 | int index; | |
65 | ||
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. */ | |
69 | int reloc_count; | |
70 | ||
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 | |
74 | function. */ | |
75 | char *unwind; | |
76 | } | |
77 | som_symbol_type; | |
78 | ||
79 | struct somdata | |
80 | { | |
81 | struct header *file_hdr; | |
6863eb4b JL |
82 | struct copyright_aux_hdr *copyright_aux_hdr; |
83 | struct user_string_aux_hdr *version_aux_hdr; | |
176ed088 JL |
84 | som_symbol_type *symtab; |
85 | char *stringtab; | |
86 | ||
87 | /* We remember these offsets so that after check_file_format, we have | |
88 | no dependencies on the particular format of the exec_hdr. */ | |
89 | ||
90 | file_ptr sym_filepos; | |
91 | file_ptr str_filepos; | |
92 | file_ptr reloc_filepos; | |
93 | ||
94 | unsigned stringtab_size; | |
95 | }; | |
96 | ||
97 | struct som_data_struct | |
98 | { | |
99 | struct somdata a; | |
100 | }; | |
101 | ||
102 | /* Used to keep extra SOM specific information for a given section. | |
103 | ||
104 | reloc_size holds the size of the relocation stream, note this | |
105 | is very different from the number of relocations as SOM relocations | |
106 | are variable length. | |
107 | ||
108 | reloc_stream is the actual stream of relocation entries. | |
109 | ||
110 | The BFD section index may not exactly match a SOM subspace index, | |
111 | for this reason we keep track of the original SOM subspace index | |
112 | when a subspace is turned into a BFD section. */ | |
113 | ||
114 | struct som_section_data_struct | |
115 | { | |
116 | unsigned int reloc_size; | |
117 | char *reloc_stream; | |
118 | unsigned int subspace_index; | |
119 | asection *containing_space; | |
120 | int is_space; | |
121 | struct space_dictionary_record space_dict; | |
122 | int is_subspace; | |
123 | struct subspace_dictionary_record subspace_dict; | |
124 | }; | |
125 | ||
126 | #define somdata(bfd) ((bfd)->tdata.som_data->a) | |
127 | #define obj_som_file_hdr(bfd) (somdata(bfd).file_hdr) | |
6863eb4b JL |
128 | #define obj_som_copyright_hdr(bfd) (somdata(bfd).copyright_aux_hdr) |
129 | #define obj_som_version_hdr(bfd) (somdata(bfd).version_aux_hdr) | |
176ed088 JL |
130 | #define obj_som_symtab(bfd) (somdata(bfd).symtab) |
131 | #define obj_som_stringtab(bfd) (somdata(bfd).stringtab) | |
132 | #define obj_som_sym_filepos(bfd) (somdata(bfd).sym_filepos) | |
133 | #define obj_som_str_filepos(bfd) (somdata(bfd).str_filepos) | |
134 | #define obj_som_stringtab_size(bfd) (somdata(bfd).stringtab_size) | |
135 | #define obj_som_reloc_filepos(bfd) (somdata(bfd).reloc_filepos) | |
136 | #define som_section_data(sec) \ | |
137 | ((struct som_section_data_struct *)sec->used_by_bfd) | |
138 | #define som_symbol_data(symbol) \ | |
44fd6622 | 139 | ((som_symbol_type *) symbol) |
176ed088 JL |
140 | |
141 | ||
142 | /* Defines groups of basic relocations. FIXME: These should | |
143 | be the only basic relocations created by GAS. The rest | |
144 | should be internal to the BFD backend. | |
145 | ||
146 | The idea is both SOM and ELF define these basic relocation | |
147 | types so they map into a SOM or ELF specific reloation as | |
148 | appropriate. This allows GAS to share much more code | |
149 | between the two object formats. */ | |
150 | ||
151 | #define R_HPPA_NONE R_NO_RELOCATION | |
152 | #define R_HPPA R_CODE_ONE_SYMBOL | |
153 | #define R_HPPA_ABS_CALL R_ABS_CALL | |
154 | #define R_HPPA_PCREL_CALL R_PCREL_CALL | |
155 | #define R_HPPA_GOTOFF R_DP_RELATIVE | |
156 | #define R_HPPA_COMPLEX R_COMP1 | |
157 | #define R_HPPA_COMPLEX_PCREL_CALL R_COMP2 | |
158 | #define R_HPPA_COMPLEX_ABS_CALL R_COMP3 | |
159 | #define R_HPPA_ENTRY R_ENTRY | |
160 | #define R_HPPA_EXIT R_EXIT | |
161 | ||
6863eb4b JL |
162 | /* Exported functions, mostly for use by GAS. */ |
163 | void bfd_som_set_section_attributes PARAMS ((asection *, int, int, | |
44fd6622 | 164 | unsigned int, int)); |
6863eb4b JL |
165 | void bfd_som_set_subsection_attributes PARAMS ((asection *, asection *, |
166 | int, unsigned int, int)); | |
167 | void bfd_som_set_symbol_type PARAMS ((asymbol *, unsigned int)); | |
168 | void bfd_som_attach_unwind_info PARAMS ((asymbol *, char *)); | |
44fd6622 JL |
169 | boolean bfd_som_attach_aux_hdr PARAMS ((bfd *, int, char *)); |
170 | int ** hppa_som_gen_reloc_type | |
171 | PARAMS ((bfd *, int, int, enum hppa_reloc_field_selector_type_alt)); | |
176ed088 | 172 | #endif /* _SOM_H */ |