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 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 2 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., 59 Temple Place - Suite 330, Boston, MA 23 02111-1307, USA. */ 24 25 #ifndef _SOM_H 26 #define _SOM_H 27 28 #include "libhppa.h" 29 30 /* Enable PA2.0 if available */ 31 #define PA_2_0 32 33 #include <a.out.h> 34 #include <lst.h> 35 #include <ar.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 #define FILE_HDR_SIZE sizeof (struct header) 53 #define AUX_HDR_SIZE sizeof (struct som_exec_auxhdr) 54 55 typedef struct som_symbol 56 { 57 asymbol symbol; 58 unsigned int som_type; 59 60 /* Structured like the ELF tc_data union. Allows more code sharing 61 in GAS this way. */ 62 union 63 { 64 struct 65 { 66 unsigned int hppa_arg_reloc; 67 unsigned int hppa_priv_level; 68 } ap; 69 PTR any; 70 } 71 tc_data; 72 73 /* Index of this symbol in the symbol table. Only used when 74 building relocation streams for incomplete objects. */ 75 int index; 76 77 /* How many times this symbol is used in a relocation. By sorting 78 the symbols from most used to least used we can significantly 79 reduce the size of the relocation stream for incomplete objects. */ 80 int reloc_count; 81 82 /* During object file writing, the offset of the name of this symbol 83 in the SOM string table. */ 84 int stringtab_offset; 85 } 86 som_symbol_type; 87 88 /* A structure containing all the magic information stored in a BFD's 89 private data which needs to be copied during an objcopy/strip run. */ 90 struct som_exec_data 91 { 92 /* Sort-of a magic number. BSD uses it to distinguish between 93 native executables and hpux executables. */ 94 short system_id; 95 96 /* Magic exec flags. These control things like whether or not 97 null pointer dereferencing is allowed and the like. */ 98 long exec_flags; 99 100 /* We must preserve the version identifier too. Some versions 101 of the HP linker do not grok NEW_VERSION_ID for reasons unknown. */ 102 unsigned int version_id; 103 104 /* Add more stuff here as needed. Good examples of information 105 we might want to pass would be presumed_dp, entry_* and maybe 106 others from the file header. */ 107 }; 108 109 struct somdata 110 { 111 /* All the magic information about an executable which lives 112 in the private BFD structure and needs to be copied from 113 the input bfd to the output bfd during an objcopy/strip. */ 114 struct som_exec_data *exec_data; 115 116 /* These three fields are only used when writing files and are 117 generated from scratch. They need not be copied for objcopy 118 or strip to work. */ 119 struct header *file_hdr; 120 struct copyright_aux_hdr *copyright_aux_hdr; 121 struct user_string_aux_hdr *version_aux_hdr; 122 struct som_exec_auxhdr *exec_hdr; 123 COMPUNIT *comp_unit; 124 125 /* Pointers to a saved copy of the symbol and string tables. These 126 need not be copied for objcopy or strip to work. */ 127 som_symbol_type *symtab; 128 char *stringtab; 129 asymbol **sorted_syms; 130 131 /* We remember these offsets so that after check_file_format, we have 132 no dependencies on the particular format of the exec_hdr. 133 These offsets need not be copied for objcopy or strip to work. */ 134 135 file_ptr sym_filepos; 136 file_ptr str_filepos; 137 file_ptr reloc_filepos; 138 unsigned stringtab_size; 139 }; 140 141 struct som_data_struct 142 { 143 struct somdata a; 144 }; 145 146 /* Substructure of som_section_data_struct used to hold information 147 which can't be represented by the generic BFD section structure, 148 but which must be copied during objcopy or strip. */ 149 struct som_copyable_section_data_struct 150 { 151 /* Various fields in space and subspace headers that we need 152 to pass around. */ 153 unsigned int sort_key : 8; 154 unsigned int access_control_bits : 7; 155 unsigned int is_defined : 1; 156 unsigned int is_private : 1; 157 unsigned int quadrant : 2; 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 char *reloc_stream; 186 struct space_dictionary_record *space_dict; 187 struct 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) \ 205 ((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 232 PARAMS ((asection *, int, int, unsigned int, int)); 233 bfd_boolean bfd_som_set_subsection_attributes 234 PARAMS ((asection *, asection *, int, unsigned int, int)); 235 void bfd_som_set_symbol_type PARAMS ((asymbol *, unsigned int)); 236 bfd_boolean bfd_som_attach_aux_hdr PARAMS ((bfd *, int, char *)); 237 int ** hppa_som_gen_reloc_type 238 PARAMS ((bfd *, int, int, enum hppa_reloc_field_selector_type_alt, 239 int, asymbol *)); 240 bfd_boolean bfd_som_attach_compilation_unit 241 PARAMS ((bfd *, const char *, const char *, const char *, const char *)); 242 243 #endif /* _SOM_H */ 244