| 1 | /* HP PA-RISC SOM object file format: definitions internal to BFD.
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| 2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 2000
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| 3 | Free Software Foundation, Inc.
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| 4 |
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| 5 | Contributed by the Center for Software Science at the
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| 6 | University of Utah (pa-gdb-bugs@cs.utah.edu).
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| 7 |
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| 8 | This file is part of BFD, the Binary File Descriptor library.
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| 9 |
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| 10 | This program is free software; you can redistribute it and/or modify
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| 11 | it under the terms of the GNU General Public License as published by
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| 12 | the Free Software Foundation; either version 2 of the License, or
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| 13 | (at your option) any later version.
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| 14 |
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| 15 | This program is distributed in the hope that it will be useful,
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| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 18 | GNU General Public License for more details.
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| 19 |
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| 20 | You should have received a copy of the GNU General Public License
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| 21 | along with this program; if not, write to the Free Software
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| 22 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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| 23 | 02111-1307, USA. */
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| 24 |
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| 25 | #ifndef _SOM_H
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| 26 | #define _SOM_H
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| 27 |
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| 28 | #include "libhppa.h"
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| 29 |
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| 30 | #include <a.out.h>
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| 31 | #include <lst.h>
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| 32 | #include <ar.h>
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| 33 |
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| 34 | /* The SOM BFD backend doesn't currently use anything from these
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| 35 | two include files, but it's likely to need them in the future. */
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| 36 | #ifdef R_DLT_REL
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| 37 | #include <shl.h>
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| 38 | #include <dl.h>
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| 39 | #endif
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| 40 |
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| 41 | #if defined(HOST_HPPABSD) || defined (HOST_HPPAOSF)
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| 42 | /* BSD uses a completely different scheme for object file identification.
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| 43 | so for now, define _PA_RISC_ID to accept any random value for a model
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| 44 | number. */
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| 45 | #undef _PA_RISC_ID
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| 46 | #define _PA_RISC_ID(__m_num) 1
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| 47 | #endif /* HOST_HPPABSD */
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| 48 |
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| 49 | #define FILE_HDR_SIZE sizeof (struct header)
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| 50 | #define AUX_HDR_SIZE sizeof (struct som_exec_auxhdr)
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| 51 |
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| 52 | typedef struct som_symbol
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| 53 | {
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| 54 | asymbol symbol;
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| 55 | unsigned int som_type;
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| 56 |
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| 57 | /* Structured like the ELF tc_data union. Allows more code sharing
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| 58 | in GAS this way. */
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| 59 | union
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| 60 | {
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| 61 | struct
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| 62 | {
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| 63 | unsigned int hppa_arg_reloc;
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| 64 | unsigned int hppa_priv_level;
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| 65 | } ap;
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| 66 | PTR any;
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| 67 | }
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| 68 | tc_data;
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| 69 |
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| 70 | /* Index of this symbol in the symbol table. Only used when
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| 71 | building relocation streams for incomplete objects. */
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| 72 | int index;
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| 73 |
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| 74 | /* How many times this symbol is used in a relocation. By sorting
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| 75 | the symbols from most used to least used we can significantly
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| 76 | reduce the size of the relocation stream for incomplete objects. */
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| 77 | int reloc_count;
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| 78 |
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| 79 | /* During object file writing, the offset of the name of this symbol
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| 80 | in the SOM string table. */
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| 81 | int stringtab_offset;
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| 82 | }
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| 83 | som_symbol_type;
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| 84 |
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| 85 | /* A structure containing all the magic information stored in a BFD's
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| 86 | private data which needs to be copied during an objcopy/strip run. */
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| 87 | struct som_exec_data
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| 88 | {
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| 89 | /* Sort-of a magic number. BSD uses it to distinguish between
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| 90 | native executables and hpux executables. */
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| 91 | short system_id;
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| 92 |
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| 93 | /* Magic exec flags. These control things like whether or not
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| 94 | null pointer dereferencing is allowed and the like. */
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| 95 | long exec_flags;
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| 96 |
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| 97 | /* Add more stuff here as needed. Good examples of information
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| 98 | we might want to pass would be presumed_dp, entry_* and maybe
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| 99 | others from the file header. */
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| 100 | };
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| 101 |
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| 102 | struct somdata
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| 103 | {
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| 104 | /* All the magic information about an executable which lives
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| 105 | in the private BFD structure and needs to be copied from
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| 106 | the input bfd to the output bfd during a objcopy/strip. */
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| 107 | struct som_exec_data *exec_data;
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| 108 |
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| 109 | /* These three fields are only used when writing files and are
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| 110 | generated from scratch. They need not be copied for objcopy
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| 111 | or strip to work. */
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| 112 | struct header *file_hdr;
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| 113 | struct copyright_aux_hdr *copyright_aux_hdr;
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| 114 | struct user_string_aux_hdr *version_aux_hdr;
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| 115 | struct som_exec_auxhdr *exec_hdr;
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| 116 | COMPUNIT *comp_unit;
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| 117 |
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| 118 | /* Pointers to a saved copy of the symbol and string tables. These
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| 119 | need not be copied for objcopy or strip to work. */
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| 120 | som_symbol_type *symtab;
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| 121 | char *stringtab;
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| 122 | asymbol **sorted_syms;
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| 123 |
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| 124 | /* We remember these offsets so that after check_file_format, we have
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| 125 | no dependencies on the particular format of the exec_hdr.
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| 126 | These offsets need not be copied for objcopy or strip to work. */
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| 127 |
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| 128 | file_ptr sym_filepos;
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| 129 | file_ptr str_filepos;
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| 130 | file_ptr reloc_filepos;
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| 131 | unsigned stringtab_size;
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| 132 | };
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| 133 |
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| 134 | struct som_data_struct
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| 135 | {
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| 136 | struct somdata a;
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| 137 | };
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| 138 |
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| 139 | /* Substructure of som_section_data_struct used to hold information
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| 140 | which can't be represented by the generic BFD section structure,
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| 141 | but which must be copied during objcopy or strip. */
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| 142 | struct som_copyable_section_data_struct
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| 143 | {
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| 144 | /* Various fields in space and subspace headers that we need
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| 145 | to pass around. */
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| 146 | unsigned int sort_key : 8;
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| 147 | unsigned int access_control_bits : 7;
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| 148 | unsigned int is_defined : 1;
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| 149 | unsigned int is_private : 1;
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| 150 | unsigned int quadrant : 2;
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| 151 |
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| 152 | /* For subspaces, this points to the section which represents the
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| 153 | space in which the subspace is contained. For spaces it points
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| 154 | back to the section for this space. */
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| 155 | asection *container;
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| 156 |
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| 157 | /* The user-specified space number. It is wrong to use this as
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| 158 | an index since duplicates and holes are allowed. */
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| 159 | int space_number;
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| 160 |
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| 161 | /* Add more stuff here as needed. Good examples of information
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| 162 | we might want to pass would be initialization pointers,
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| 163 | and the many subspace flags we do not represent yet. */
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| 164 | };
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| 165 |
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| 166 | /* Used to keep extra SOM specific information for a given section.
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| 167 |
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| 168 | reloc_size holds the size of the relocation stream, note this
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| 169 | is very different from the number of relocations as SOM relocations
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| 170 | are variable length.
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| 171 |
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| 172 | reloc_stream is the actual stream of relocation entries. */
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| 173 |
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| 174 | struct som_section_data_struct
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| 175 | {
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| 176 | struct som_copyable_section_data_struct *copy_data;
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| 177 | unsigned int reloc_size;
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| 178 | char *reloc_stream;
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| 179 | struct space_dictionary_record *space_dict;
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| 180 | struct subspace_dictionary_record *subspace_dict;
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| 181 | };
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| 182 |
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| 183 | #define somdata(bfd) ((bfd)->tdata.som_data->a)
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| 184 | #define obj_som_exec_data(bfd) (somdata(bfd).exec_data)
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| 185 | #define obj_som_file_hdr(bfd) (somdata(bfd).file_hdr)
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| 186 | #define obj_som_exec_hdr(bfd) (somdata(bfd).exec_hdr)
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| 187 | #define obj_som_copyright_hdr(bfd) (somdata(bfd).copyright_aux_hdr)
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| 188 | #define obj_som_version_hdr(bfd) (somdata(bfd).version_aux_hdr)
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| 189 | #define obj_som_compilation_unit(bfd) (somdata(bfd).comp_unit)
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| 190 | #define obj_som_symtab(bfd) (somdata(bfd).symtab)
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| 191 | #define obj_som_stringtab(bfd) (somdata(bfd).stringtab)
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| 192 | #define obj_som_sym_filepos(bfd) (somdata(bfd).sym_filepos)
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| 193 | #define obj_som_str_filepos(bfd) (somdata(bfd).str_filepos)
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| 194 | #define obj_som_stringtab_size(bfd) (somdata(bfd).stringtab_size)
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| 195 | #define obj_som_reloc_filepos(bfd) (somdata(bfd).reloc_filepos)
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| 196 | #define obj_som_sorted_syms(bfd) (somdata(bfd).sorted_syms)
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| 197 | #define som_section_data(sec) \
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| 198 | ((struct som_section_data_struct *)sec->used_by_bfd)
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| 199 | #define som_symbol_data(symbol) ((som_symbol_type *) symbol)
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| 200 |
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| 201 | /* Defines groups of basic relocations. FIXME: These should
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| 202 | be the only basic relocations created by GAS. The rest
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| 203 | should be internal to the BFD backend.
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| 204 |
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| 205 | The idea is both SOM and ELF define these basic relocation
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| 206 | types so they map into a SOM or ELF specific reloation as
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| 207 | appropriate. This allows GAS to share much more code
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| 208 | between the two object formats. */
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| 209 |
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| 210 | #define R_HPPA_NONE R_NO_RELOCATION
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| 211 | #define R_HPPA R_CODE_ONE_SYMBOL
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| 212 | #define R_HPPA_PCREL_CALL R_PCREL_CALL
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| 213 | #define R_HPPA_ABS_CALL R_ABS_CALL
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| 214 | #define R_HPPA_GOTOFF R_DP_RELATIVE
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| 215 | #define R_HPPA_ENTRY R_ENTRY
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| 216 | #define R_HPPA_EXIT R_EXIT
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| 217 | #define R_HPPA_COMPLEX R_COMP1
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| 218 | #define R_HPPA_BEGIN_BRTAB R_BEGIN_BRTAB
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| 219 | #define R_HPPA_END_BRTAB R_END_BRTAB
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| 220 | #define R_HPPA_BEGIN_TRY R_BEGIN_TRY
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| 221 | #define R_HPPA_END_TRY R_END_TRY
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| 222 |
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| 223 | /* Exported functions, mostly for use by GAS. */
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| 224 | boolean bfd_som_set_section_attributes PARAMS ((asection *, int, int,
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| 225 | unsigned int, int));
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| 226 | boolean bfd_som_set_subsection_attributes PARAMS ((asection *, asection *,
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| 227 | int, unsigned int, int));
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| 228 | void bfd_som_set_symbol_type PARAMS ((asymbol *, unsigned int));
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| 229 | boolean bfd_som_attach_aux_hdr PARAMS ((bfd *, int, char *));
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| 230 | int ** hppa_som_gen_reloc_type
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| 231 | PARAMS ((bfd *, int, int, enum hppa_reloc_field_selector_type_alt,
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| 232 | int, asymbol *));
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| 233 | boolean bfd_som_attach_compilation_unit
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| 234 | PARAMS ((bfd *, const char *, const char *, const char *, const char *));
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| 235 |
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| 236 | #endif /* _SOM_H */
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