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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" | |
27 | ||
28 | #include <a.out.h> | |
29 | ||
30 | ||
31 | #ifdef HOST_HPPABSD | |
32 | /* BSD uses a completely different scheme for object file identification. | |
33 | so for now, define _PA_RISC_ID to accept any random value for a model | |
34 | number. */ | |
35 | #undef _PA_RISC_ID | |
36 | #define _PA_RISC_ID(__m_num) 1 | |
37 | #endif /* HOST_HPPABSD */ | |
38 | ||
39 | #define FILE_HDR_SIZE sizeof(struct header) | |
40 | #define AUX_HDR_SIZE sizeof(struct som_exec_auxhdr) | |
41 | ||
42 | typedef struct som_symbol | |
43 | { | |
44 | asymbol symbol; | |
45 | short desc; | |
46 | char other; | |
47 | unsigned char type; | |
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 | ||
76 | struct somdata | |
77 | { | |
78 | struct header *file_hdr; | |
79 | som_symbol_type *symtab; | |
80 | char *stringtab; | |
81 | ||
82 | /* We remember these offsets so that after check_file_format, we have | |
83 | no dependencies on the particular format of the exec_hdr. */ | |
84 | ||
85 | file_ptr sym_filepos; | |
86 | file_ptr str_filepos; | |
87 | file_ptr reloc_filepos; | |
88 | ||
89 | unsigned stringtab_size; | |
90 | }; | |
91 | ||
92 | struct som_data_struct | |
93 | { | |
94 | struct somdata a; | |
95 | }; | |
96 | ||
97 | /* Used to keep extra SOM specific information for a given section. | |
98 | ||
99 | reloc_size holds the size of the relocation stream, note this | |
100 | is very different from the number of relocations as SOM relocations | |
101 | are variable length. | |
102 | ||
103 | reloc_stream is the actual stream of relocation entries. | |
104 | ||
105 | The BFD section index may not exactly match a SOM subspace index, | |
106 | for this reason we keep track of the original SOM subspace index | |
107 | when a subspace is turned into a BFD section. */ | |
108 | ||
109 | struct som_section_data_struct | |
110 | { | |
111 | unsigned int reloc_size; | |
112 | char *reloc_stream; | |
113 | unsigned int subspace_index; | |
114 | asection *containing_space; | |
115 | int is_space; | |
116 | struct space_dictionary_record space_dict; | |
117 | int is_subspace; | |
118 | struct subspace_dictionary_record subspace_dict; | |
119 | }; | |
120 | ||
121 | #define somdata(bfd) ((bfd)->tdata.som_data->a) | |
122 | #define obj_som_file_hdr(bfd) (somdata(bfd).file_hdr) | |
123 | #define obj_som_symtab(bfd) (somdata(bfd).symtab) | |
124 | #define obj_som_stringtab(bfd) (somdata(bfd).stringtab) | |
125 | #define obj_som_sym_filepos(bfd) (somdata(bfd).sym_filepos) | |
126 | #define obj_som_str_filepos(bfd) (somdata(bfd).str_filepos) | |
127 | #define obj_som_stringtab_size(bfd) (somdata(bfd).stringtab_size) | |
128 | #define obj_som_reloc_filepos(bfd) (somdata(bfd).reloc_filepos) | |
129 | #define som_section_data(sec) \ | |
130 | ((struct som_section_data_struct *)sec->used_by_bfd) | |
131 | #define som_symbol_data(symbol) \ | |
132 | (((som_symbol_type **) symbol->udata)) | |
133 | ||
134 | ||
135 | /* Defines groups of basic relocations. FIXME: These should | |
136 | be the only basic relocations created by GAS. The rest | |
137 | should be internal to the BFD backend. | |
138 | ||
139 | The idea is both SOM and ELF define these basic relocation | |
140 | types so they map into a SOM or ELF specific reloation as | |
141 | appropriate. This allows GAS to share much more code | |
142 | between the two object formats. */ | |
143 | ||
144 | #define R_HPPA_NONE R_NO_RELOCATION | |
145 | #define R_HPPA R_CODE_ONE_SYMBOL | |
146 | #define R_HPPA_ABS_CALL R_ABS_CALL | |
147 | #define R_HPPA_PCREL_CALL R_PCREL_CALL | |
148 | #define R_HPPA_GOTOFF R_DP_RELATIVE | |
149 | #define R_HPPA_COMPLEX R_COMP1 | |
150 | #define R_HPPA_COMPLEX_PCREL_CALL R_COMP2 | |
151 | #define R_HPPA_COMPLEX_ABS_CALL R_COMP3 | |
152 | #define R_HPPA_ENTRY R_ENTRY | |
153 | #define R_HPPA_EXIT R_EXIT | |
154 | ||
155 | #endif /* _SOM_H */ |