| 1 | /* HP PA-RISC SOM object file format: definitions internal to BFD. |
| 2 | Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 2000, 2001, |
| 3 | 2002, 2003, 2004, 2005, 2007, 2008, 2012, 2013 Free Software Foundation, Inc. |
| 4 | |
| 5 | Contributed by the Center for Software Science at the |
| 6 | University of Utah (pa-gdb-bugs@cs.utah.edu). |
| 7 | |
| 8 | This file is part of BFD, the Binary File Descriptor library. |
| 9 | |
| 10 | This program is free software; you can redistribute it and/or modify |
| 11 | it under the terms of the GNU General Public License as published by |
| 12 | the Free Software Foundation; either version 3 of the License, or |
| 13 | (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, |
| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | GNU General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program; if not, write to the Free Software |
| 22 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA |
| 23 | 02110-1301, USA. */ |
| 24 | |
| 25 | #ifndef _SOM_H |
| 26 | #define _SOM_H |
| 27 | |
| 28 | #include "libhppa.h" |
| 29 | |
| 30 | /* We want reloc.h to provide PA 2.0 defines. */ |
| 31 | #define PA_2_0 |
| 32 | |
| 33 | #include "som/aout.h" |
| 34 | #include "som/lst.h" |
| 35 | #include "som/internal.h" |
| 36 | |
| 37 | /* The SOM BFD backend doesn't currently use anything from these |
| 38 | two include files, but it's likely to need them in the future. */ |
| 39 | #ifdef R_DLT_REL |
| 40 | #include <shl.h> |
| 41 | #include <dl.h> |
| 42 | #endif |
| 43 | |
| 44 | #if defined (HOST_HPPABSD) || defined (HOST_HPPAOSF) |
| 45 | /* BSD uses a completely different scheme for object file identification. |
| 46 | so for now, define _PA_RISC_ID to accept any random value for a model |
| 47 | number. */ |
| 48 | #undef _PA_RISC_ID |
| 49 | #define _PA_RISC_ID(__m_num) 1 |
| 50 | #endif /* HOST_HPPABSD */ |
| 51 | |
| 52 | typedef struct som_symbol |
| 53 | { |
| 54 | asymbol symbol; |
| 55 | unsigned int som_type; |
| 56 | |
| 57 | /* Structured like the ELF tc_data union. Allows more code sharing |
| 58 | in GAS this way. */ |
| 59 | union |
| 60 | { |
| 61 | struct |
| 62 | { |
| 63 | unsigned int hppa_arg_reloc; |
| 64 | unsigned int hppa_priv_level; |
| 65 | } ap; |
| 66 | void * any; |
| 67 | } |
| 68 | tc_data; |
| 69 | |
| 70 | /* Index of this symbol in the symbol table. Only used when |
| 71 | building relocation streams for incomplete objects. */ |
| 72 | int index; |
| 73 | |
| 74 | /* How many times this symbol is used in a relocation. By sorting |
| 75 | the symbols from most used to least used we can significantly |
| 76 | reduce the size of the relocation stream for incomplete objects. */ |
| 77 | int reloc_count; |
| 78 | |
| 79 | /* During object file writing, the offset of the name of this symbol |
| 80 | in the SOM string table. */ |
| 81 | int stringtab_offset; |
| 82 | } |
| 83 | som_symbol_type; |
| 84 | |
| 85 | /* A structure containing all the magic information stored in a BFD's |
| 86 | private data which needs to be copied during an objcopy/strip run. */ |
| 87 | struct som_exec_data |
| 88 | { |
| 89 | /* Sort-of a magic number. BSD uses it to distinguish between |
| 90 | native executables and hpux executables. */ |
| 91 | short system_id; |
| 92 | |
| 93 | /* Magic exec flags. These control things like whether or not |
| 94 | null pointer dereferencing is allowed and the like. */ |
| 95 | long exec_flags; |
| 96 | |
| 97 | /* We must preserve the version identifier too. Some versions |
| 98 | of the HP linker do not grok NEW_VERSION_ID for reasons unknown. */ |
| 99 | unsigned int version_id; |
| 100 | |
| 101 | /* Add more stuff here as needed. Good examples of information |
| 102 | we might want to pass would be presumed_dp, entry_* and maybe |
| 103 | others from the file header. */ |
| 104 | }; |
| 105 | |
| 106 | struct somdata |
| 107 | { |
| 108 | /* All the magic information about an executable which lives |
| 109 | in the private BFD structure and needs to be copied from |
| 110 | the input bfd to the output bfd during an objcopy/strip. */ |
| 111 | struct som_exec_data *exec_data; |
| 112 | |
| 113 | /* These three fields are only used when writing files and are |
| 114 | generated from scratch. They need not be copied for objcopy |
| 115 | or strip to work. */ |
| 116 | struct som_header *file_hdr; |
| 117 | struct som_string_auxhdr *copyright_aux_hdr; |
| 118 | struct som_string_auxhdr *version_aux_hdr; |
| 119 | struct som_exec_auxhdr *exec_hdr; |
| 120 | struct som_compilation_unit *comp_unit; |
| 121 | |
| 122 | /* Pointers to a saved copy of the symbol and string tables. These |
| 123 | need not be copied for objcopy or strip to work. */ |
| 124 | som_symbol_type *symtab; |
| 125 | char *stringtab; |
| 126 | asymbol **sorted_syms; |
| 127 | |
| 128 | /* We remember these offsets so that after check_file_format, we have |
| 129 | no dependencies on the particular format of the exec_hdr. |
| 130 | These offsets need not be copied for objcopy or strip to work. */ |
| 131 | |
| 132 | file_ptr sym_filepos; |
| 133 | file_ptr str_filepos; |
| 134 | file_ptr reloc_filepos; |
| 135 | unsigned stringtab_size; |
| 136 | void * line_info; |
| 137 | }; |
| 138 | |
| 139 | struct som_data_struct |
| 140 | { |
| 141 | struct somdata a; |
| 142 | }; |
| 143 | |
| 144 | /* Substructure of som_section_data_struct used to hold information |
| 145 | which can't be represented by the generic BFD section structure, |
| 146 | but which must be copied during objcopy or strip. */ |
| 147 | struct som_copyable_section_data_struct |
| 148 | { |
| 149 | /* Various fields in space and subspace headers that we need |
| 150 | to pass around. */ |
| 151 | unsigned int sort_key : 8; |
| 152 | unsigned int access_control_bits : 7; |
| 153 | unsigned int is_defined : 1; |
| 154 | unsigned int is_private : 1; |
| 155 | unsigned int quadrant : 2; |
| 156 | unsigned int is_comdat : 1; |
| 157 | unsigned int is_common : 1; |
| 158 | unsigned int dup_common : 1; |
| 159 | |
| 160 | /* For subspaces, this points to the section which represents the |
| 161 | space in which the subspace is contained. For spaces it points |
| 162 | back to the section for this space. */ |
| 163 | asection *container; |
| 164 | |
| 165 | /* The user-specified space number. It is wrong to use this as |
| 166 | an index since duplicates and holes are allowed. */ |
| 167 | int space_number; |
| 168 | |
| 169 | /* Add more stuff here as needed. Good examples of information |
| 170 | we might want to pass would be initialization pointers, |
| 171 | and the many subspace flags we do not represent yet. */ |
| 172 | }; |
| 173 | |
| 174 | /* Used to keep extra SOM specific information for a given section. |
| 175 | |
| 176 | reloc_size holds the size of the relocation stream, note this |
| 177 | is very different from the number of relocations as SOM relocations |
| 178 | are variable length. |
| 179 | |
| 180 | reloc_stream is the actual stream of relocation entries. */ |
| 181 | |
| 182 | struct som_section_data_struct |
| 183 | { |
| 184 | struct som_copyable_section_data_struct *copy_data; |
| 185 | unsigned int reloc_size; |
| 186 | unsigned char *reloc_stream; |
| 187 | struct som_space_dictionary_record *space_dict; |
| 188 | struct som_subspace_dictionary_record *subspace_dict; |
| 189 | }; |
| 190 | |
| 191 | #define somdata(bfd) ((bfd)->tdata.som_data->a) |
| 192 | #define obj_som_exec_data(bfd) (somdata (bfd).exec_data) |
| 193 | #define obj_som_file_hdr(bfd) (somdata (bfd).file_hdr) |
| 194 | #define obj_som_exec_hdr(bfd) (somdata (bfd).exec_hdr) |
| 195 | #define obj_som_copyright_hdr(bfd) (somdata (bfd).copyright_aux_hdr) |
| 196 | #define obj_som_version_hdr(bfd) (somdata (bfd).version_aux_hdr) |
| 197 | #define obj_som_compilation_unit(bfd) (somdata (bfd).comp_unit) |
| 198 | #define obj_som_symtab(bfd) (somdata (bfd).symtab) |
| 199 | #define obj_som_stringtab(bfd) (somdata (bfd).stringtab) |
| 200 | #define obj_som_sym_filepos(bfd) (somdata (bfd).sym_filepos) |
| 201 | #define obj_som_str_filepos(bfd) (somdata (bfd).str_filepos) |
| 202 | #define obj_som_stringtab_size(bfd) (somdata (bfd).stringtab_size) |
| 203 | #define obj_som_reloc_filepos(bfd) (somdata (bfd).reloc_filepos) |
| 204 | #define obj_som_sorted_syms(bfd) (somdata (bfd).sorted_syms) |
| 205 | #define som_section_data(sec) ((struct som_section_data_struct *) sec->used_by_bfd) |
| 206 | #define som_symbol_data(symbol) ((som_symbol_type *) symbol) |
| 207 | |
| 208 | /* Defines groups of basic relocations. FIXME: These should |
| 209 | be the only basic relocations created by GAS. The rest |
| 210 | should be internal to the BFD backend. |
| 211 | |
| 212 | The idea is both SOM and ELF define these basic relocation |
| 213 | types so they map into a SOM or ELF specific relocation as |
| 214 | appropriate. This allows GAS to share much more code |
| 215 | between the two object formats. */ |
| 216 | |
| 217 | #define R_HPPA_NONE R_NO_RELOCATION |
| 218 | #define R_HPPA R_CODE_ONE_SYMBOL |
| 219 | #define R_HPPA_PCREL_CALL R_PCREL_CALL |
| 220 | #define R_HPPA_ABS_CALL R_ABS_CALL |
| 221 | #define R_HPPA_GOTOFF R_DP_RELATIVE |
| 222 | #define R_HPPA_ENTRY R_ENTRY |
| 223 | #define R_HPPA_EXIT R_EXIT |
| 224 | #define R_HPPA_COMPLEX R_COMP1 |
| 225 | #define R_HPPA_BEGIN_BRTAB R_BEGIN_BRTAB |
| 226 | #define R_HPPA_END_BRTAB R_END_BRTAB |
| 227 | #define R_HPPA_BEGIN_TRY R_BEGIN_TRY |
| 228 | #define R_HPPA_END_TRY R_END_TRY |
| 229 | |
| 230 | /* Exported functions, mostly for use by GAS. */ |
| 231 | bfd_boolean bfd_som_set_section_attributes (asection *, int, int, unsigned int, int); |
| 232 | bfd_boolean bfd_som_set_subsection_attributes (asection *, asection *, int, unsigned int, int, int, int, int); |
| 233 | void bfd_som_set_symbol_type (asymbol *, unsigned int); |
| 234 | bfd_boolean bfd_som_attach_aux_hdr (bfd *, int, char *); |
| 235 | int ** hppa_som_gen_reloc_type (bfd *, int, int, enum hppa_reloc_field_selector_type_alt, int, asymbol *); |
| 236 | bfd_boolean bfd_som_attach_compilation_unit (bfd *, const char *, const char *, const char *, const char *); |
| 237 | asection * bfd_section_from_som_symbol (bfd *abfd, struct som_external_symbol_dictionary_record *symbol); |
| 238 | |
| 239 | #endif /* _SOM_H */ |