1 /* HP PA-RISC SOM object file format: definitions internal to BFD. 2 Copyright (C) 1990-2014 Free Software Foundation, Inc. 3 4 Contributed by the Center for Software Science at the 5 University of Utah (pa-gdb-bugs (at) 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 3 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., 51 Franklin Street - Fifth Floor, Boston, MA 22 02110-1301, USA. */ 23 24 #ifndef _SOM_H 25 #define _SOM_H 26 27 #include "libhppa.h" 28 29 /* We want reloc.h to provide PA 2.0 defines. */ 30 #define PA_2_0 31 32 #include "som/aout.h" 33 #include "som/lst.h" 34 #include "som/internal.h" 35 36 /* The SOM BFD backend doesn't currently use anything from these 37 two include files, but it's likely to need them in the future. */ 38 #ifdef R_DLT_REL 39 #include <shl.h> 40 #include <dl.h> 41 #endif 42 43 #if defined (HOST_HPPABSD) || defined (HOST_HPPAOSF) 44 /* BSD uses a completely different scheme for object file identification. 45 so for now, define _PA_RISC_ID to accept any random value for a model 46 number. */ 47 #undef _PA_RISC_ID 48 #define _PA_RISC_ID(__m_num) 1 49 #endif /* HOST_HPPABSD */ 50 51 typedef struct som_symbol 52 { 53 asymbol symbol; 54 unsigned int som_type; 55 56 /* Structured like the ELF tc_data union. Allows more code sharing 57 in GAS this way. */ 58 union 59 { 60 struct 61 { 62 unsigned int hppa_arg_reloc; 63 unsigned int hppa_priv_level; 64 } ap; 65 void * any; 66 } 67 tc_data; 68 69 /* Index of this symbol in the symbol table. Only used when 70 building relocation streams for incomplete objects. */ 71 int index; 72 73 /* How many times this symbol is used in a relocation. By sorting 74 the symbols from most used to least used we can significantly 75 reduce the size of the relocation stream for incomplete objects. */ 76 int reloc_count; 77 78 /* During object file writing, the offset of the name of this symbol 79 in the SOM string table. */ 80 int stringtab_offset; 81 } 82 som_symbol_type; 83 84 /* A structure containing all the magic information stored in a BFD's 85 private data which needs to be copied during an objcopy/strip run. */ 86 struct som_exec_data 87 { 88 /* Sort-of a magic number. BSD uses it to distinguish between 89 native executables and hpux executables. */ 90 short system_id; 91 92 /* Magic exec flags. These control things like whether or not 93 null pointer dereferencing is allowed and the like. */ 94 long exec_flags; 95 96 /* We must preserve the version identifier too. Some versions 97 of the HP linker do not grok NEW_VERSION_ID for reasons unknown. */ 98 unsigned int version_id; 99 100 /* Add more stuff here as needed. Good examples of information 101 we might want to pass would be presumed_dp, entry_* and maybe 102 others from the file header. */ 103 }; 104 105 struct somdata 106 { 107 /* All the magic information about an executable which lives 108 in the private BFD structure and needs to be copied from 109 the input bfd to the output bfd during an objcopy/strip. */ 110 struct som_exec_data *exec_data; 111 112 /* These three fields are only used when writing files and are 113 generated from scratch. They need not be copied for objcopy 114 or strip to work. */ 115 struct som_header *file_hdr; 116 struct som_string_auxhdr *copyright_aux_hdr; 117 struct som_string_auxhdr *version_aux_hdr; 118 struct som_exec_auxhdr *exec_hdr; 119 struct som_compilation_unit *comp_unit; 120 121 /* Pointers to a saved copy of the symbol and string tables. These 122 need not be copied for objcopy or strip to work. */ 123 som_symbol_type *symtab; 124 char *stringtab; 125 asymbol **sorted_syms; 126 127 /* We remember these offsets so that after check_file_format, we have 128 no dependencies on the particular format of the exec_hdr. 129 These offsets need not be copied for objcopy or strip to work. */ 130 131 file_ptr sym_filepos; 132 file_ptr str_filepos; 133 file_ptr reloc_filepos; 134 unsigned stringtab_size; 135 void * line_info; 136 }; 137 138 struct som_data_struct 139 { 140 struct somdata a; 141 }; 142 143 /* Substructure of som_section_data_struct used to hold information 144 which can't be represented by the generic BFD section structure, 145 but which must be copied during objcopy or strip. */ 146 struct som_copyable_section_data_struct 147 { 148 /* Various fields in space and subspace headers that we need 149 to pass around. */ 150 unsigned int sort_key : 8; 151 unsigned int access_control_bits : 7; 152 unsigned int is_defined : 1; 153 unsigned int is_private : 1; 154 unsigned int quadrant : 2; 155 unsigned int is_comdat : 1; 156 unsigned int is_common : 1; 157 unsigned int dup_common : 1; 158 159 /* For subspaces, this points to the section which represents the 160 space in which the subspace is contained. For spaces it points 161 back to the section for this space. */ 162 asection *container; 163 164 /* The user-specified space number. It is wrong to use this as 165 an index since duplicates and holes are allowed. */ 166 int space_number; 167 168 /* Add more stuff here as needed. Good examples of information 169 we might want to pass would be initialization pointers, 170 and the many subspace flags we do not represent yet. */ 171 }; 172 173 /* Used to keep extra SOM specific information for a given section. 174 175 reloc_size holds the size of the relocation stream, note this 176 is very different from the number of relocations as SOM relocations 177 are variable length. 178 179 reloc_stream is the actual stream of relocation entries. */ 180 181 struct som_section_data_struct 182 { 183 struct som_copyable_section_data_struct *copy_data; 184 unsigned int reloc_size; 185 unsigned char *reloc_stream; 186 struct som_space_dictionary_record *space_dict; 187 struct som_subspace_dictionary_record *subspace_dict; 188 }; 189 190 #define somdata(bfd) ((bfd)->tdata.som_data->a) 191 #define obj_som_exec_data(bfd) (somdata (bfd).exec_data) 192 #define obj_som_file_hdr(bfd) (somdata (bfd).file_hdr) 193 #define obj_som_exec_hdr(bfd) (somdata (bfd).exec_hdr) 194 #define obj_som_copyright_hdr(bfd) (somdata (bfd).copyright_aux_hdr) 195 #define obj_som_version_hdr(bfd) (somdata (bfd).version_aux_hdr) 196 #define obj_som_compilation_unit(bfd) (somdata (bfd).comp_unit) 197 #define obj_som_symtab(bfd) (somdata (bfd).symtab) 198 #define obj_som_stringtab(bfd) (somdata (bfd).stringtab) 199 #define obj_som_sym_filepos(bfd) (somdata (bfd).sym_filepos) 200 #define obj_som_str_filepos(bfd) (somdata (bfd).str_filepos) 201 #define obj_som_stringtab_size(bfd) (somdata (bfd).stringtab_size) 202 #define obj_som_reloc_filepos(bfd) (somdata (bfd).reloc_filepos) 203 #define obj_som_sorted_syms(bfd) (somdata (bfd).sorted_syms) 204 #define som_section_data(sec) ((struct som_section_data_struct *) sec->used_by_bfd) 205 #define som_symbol_data(symbol) ((som_symbol_type *) symbol) 206 207 /* Defines groups of basic relocations. FIXME: These should 208 be the only basic relocations created by GAS. The rest 209 should be internal to the BFD backend. 210 211 The idea is both SOM and ELF define these basic relocation 212 types so they map into a SOM or ELF specific relocation as 213 appropriate. This allows GAS to share much more code 214 between the two object formats. */ 215 216 #define R_HPPA_NONE R_NO_RELOCATION 217 #define R_HPPA R_CODE_ONE_SYMBOL 218 #define R_HPPA_PCREL_CALL R_PCREL_CALL 219 #define R_HPPA_ABS_CALL R_ABS_CALL 220 #define R_HPPA_GOTOFF R_DP_RELATIVE 221 #define R_HPPA_ENTRY R_ENTRY 222 #define R_HPPA_EXIT R_EXIT 223 #define R_HPPA_COMPLEX R_COMP1 224 #define R_HPPA_BEGIN_BRTAB R_BEGIN_BRTAB 225 #define R_HPPA_END_BRTAB R_END_BRTAB 226 #define R_HPPA_BEGIN_TRY R_BEGIN_TRY 227 #define R_HPPA_END_TRY R_END_TRY 228 229 /* Exported functions, mostly for use by GAS. */ 230 bfd_boolean bfd_som_set_section_attributes (asection *, int, int, unsigned int, int); 231 bfd_boolean bfd_som_set_subsection_attributes (asection *, asection *, int, unsigned int, int, int, int, int); 232 void bfd_som_set_symbol_type (asymbol *, unsigned int); 233 bfd_boolean bfd_som_attach_aux_hdr (bfd *, int, char *); 234 int ** hppa_som_gen_reloc_type (bfd *, int, int, enum hppa_reloc_field_selector_type_alt, int, asymbol *); 235 bfd_boolean bfd_som_attach_compilation_unit (bfd *, const char *, const char *, const char *, const char *); 236 asection * bfd_section_from_som_symbol (bfd *abfd, struct som_external_symbol_dictionary_record *symbol); 237 238 #endif /* _SOM_H */ 239
