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 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 52typedef 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 PTR 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} 83som_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. */ 87struct 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 106struct 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 139struct 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. */ 147struct 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 182struct 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. */ 231bfd_boolean bfd_som_set_section_attributes (asection *, int, int, unsigned int, int); 232bfd_boolean bfd_som_set_subsection_attributes (asection *, asection *, int, unsigned int, int, int, int, int); 233void bfd_som_set_symbol_type (asymbol *, unsigned int); 234bfd_boolean bfd_som_attach_aux_hdr (bfd *, int, char *); 235int ** hppa_som_gen_reloc_type (bfd *, int, int, enum hppa_reloc_field_selector_type_alt, int, asymbol *); 236bfd_boolean bfd_som_attach_compilation_unit (bfd *, const char *, const char *, const char *, const char *); 237 238#endif /* _SOM_H */ 239