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Diffstat (limited to 'bfd/som.h')
| -rw-r--r-- | bfd/som.h | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/bfd/som.h b/bfd/som.h new file mode 100644 index 00000000000..af378042189 --- /dev/null +++ b/bfd/som.h @@ -0,0 +1,237 @@ +/* HP PA-RISC SOM object file format: definitions internal to BFD. + Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 1998 + Free Software Foundation, Inc. + + Contributed by the Center for Software Science at the + University of Utah (pa-gdb-bugs@cs.utah.edu). + + This file is part of BFD, the Binary File Descriptor library. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA + 02111-1307, USA. */ + +#ifndef _SOM_H +#define _SOM_H + +#include "libhppa.h" + +#include <a.out.h> +#include <lst.h> +#include <ar.h> + +/* The SOM BFD backend doesn't currently use anything from these + two include files, but it's likely to need them in the future. */ +#ifdef R_DLT_REL +#include <shl.h> +#include <dl.h> +#endif + +#if defined(HOST_HPPABSD) || defined (HOST_HPPAOSF) +/* BSD uses a completely different scheme for object file identification. + so for now, define _PA_RISC_ID to accept any random value for a model + number. */ +#undef _PA_RISC_ID +#define _PA_RISC_ID(__m_num) 1 +#endif /* HOST_HPPABSD */ + +#define FILE_HDR_SIZE sizeof(struct header) +#define AUX_HDR_SIZE sizeof(struct som_exec_auxhdr) + +typedef struct som_symbol + { + asymbol symbol; + unsigned int som_type; + + /* Structured like the ELF tc_data union. Allows more code sharing + in GAS this way. */ + union + { + struct + { + unsigned int hppa_arg_reloc; + unsigned int hppa_priv_level; + } ap; + PTR any; + } + tc_data; + + /* Index of this symbol in the symbol table. Only used when + building relocation streams for incomplete objects. */ + int index; + + /* How many times this symbol is used in a relocation. By sorting + the symbols from most used to least used we can significantly + reduce the size of the relocation stream for incomplete objects. */ + int reloc_count; + + /* During object file writing, the offset of the name of this symbol + in the SOM string table. */ + int stringtab_offset; + } +som_symbol_type; + +/* A structure containing all the magic information stored in a BFD's + private data which needs to be copied during an objcopy/strip run. */ +struct som_exec_data + { + /* Sort-of a magic number. BSD uses it to distinguish between + native executables and hpux executables. */ + short system_id; + + /* Magic exec flags. These control things like whether or not + null pointer dereferencing is allowed and the like. */ + long exec_flags; + + /* Add more stuff here as needed. Good examples of information + we might want to pass would be presumed_dp, entry_* and maybe + others from the file header. */ + }; + +struct somdata + { + /* All the magic information about an executable which lives + in the private BFD structure and needs to be copied from + the input bfd to the output bfd during a objcopy/strip. */ + struct som_exec_data *exec_data; + + /* These three fields are only used when writing files and are + generated from scratch. They need not be copied for objcopy + or strip to work. */ + struct header *file_hdr; + struct copyright_aux_hdr *copyright_aux_hdr; + struct user_string_aux_hdr *version_aux_hdr; + struct som_exec_auxhdr *exec_hdr; + COMPUNIT *comp_unit; + + /* Pointers to a saved copy of the symbol and string tables. These + need not be copied for objcopy or strip to work. */ + som_symbol_type *symtab; + char *stringtab; + asymbol **sorted_syms; + + /* We remember these offsets so that after check_file_format, we have + no dependencies on the particular format of the exec_hdr. + These offsets need not be copied for objcopy or strip to work. */ + + file_ptr sym_filepos; + file_ptr str_filepos; + file_ptr reloc_filepos; + unsigned stringtab_size; + }; + +struct som_data_struct + { + struct somdata a; + }; + +/* Substructure of som_section_data_struct used to hold information + which can't be represented by the generic BFD section structure, + but which must be copied during objcopy or strip. */ +struct som_copyable_section_data_struct + { + /* Various fields in space and subspace headers that we need + to pass around. */ + unsigned int sort_key : 8; + unsigned int access_control_bits : 7; + unsigned int is_defined : 1; + unsigned int is_private : 1; + unsigned int quadrant : 2; + + /* For subspaces, this points to the section which represents the + space in which the subspace is contained. For spaces it points + back to the section for this space. */ + asection *container; + + /* The user-specified space number. It is wrong to use this as + an index since duplicates and holes are allowed. */ + int space_number; + + /* Add more stuff here as needed. Good examples of information + we might want to pass would be initialization pointers, + and the many subspace flags we do not represent yet. */ + }; + +/* Used to keep extra SOM specific information for a given section. + + reloc_size holds the size of the relocation stream, note this + is very different from the number of relocations as SOM relocations + are variable length. + + reloc_stream is the actual stream of relocation entries. */ + +struct som_section_data_struct + { + struct som_copyable_section_data_struct *copy_data; + unsigned int reloc_size; + char *reloc_stream; + struct space_dictionary_record *space_dict; + struct subspace_dictionary_record *subspace_dict; + }; + +#define somdata(bfd) ((bfd)->tdata.som_data->a) +#define obj_som_exec_data(bfd) (somdata(bfd).exec_data) +#define obj_som_file_hdr(bfd) (somdata(bfd).file_hdr) +#define obj_som_exec_hdr(bfd) (somdata(bfd).exec_hdr) +#define obj_som_copyright_hdr(bfd) (somdata(bfd).copyright_aux_hdr) +#define obj_som_version_hdr(bfd) (somdata(bfd).version_aux_hdr) +#define obj_som_compilation_unit(bfd) (somdata(bfd).comp_unit) +#define obj_som_symtab(bfd) (somdata(bfd).symtab) +#define obj_som_stringtab(bfd) (somdata(bfd).stringtab) +#define obj_som_sym_filepos(bfd) (somdata(bfd).sym_filepos) +#define obj_som_str_filepos(bfd) (somdata(bfd).str_filepos) +#define obj_som_stringtab_size(bfd) (somdata(bfd).stringtab_size) +#define obj_som_reloc_filepos(bfd) (somdata(bfd).reloc_filepos) +#define obj_som_sorted_syms(bfd) (somdata(bfd).sorted_syms) +#define som_section_data(sec) \ + ((struct som_section_data_struct *)sec->used_by_bfd) +#define som_symbol_data(symbol) ((som_symbol_type *) symbol) + + +/* Defines groups of basic relocations. FIXME: These should + be the only basic relocations created by GAS. The rest + should be internal to the BFD backend. + + The idea is both SOM and ELF define these basic relocation + types so they map into a SOM or ELF specific reloation as + appropriate. This allows GAS to share much more code + between the two object formats. */ + +#define R_HPPA_NONE R_NO_RELOCATION +#define R_HPPA R_CODE_ONE_SYMBOL +#define R_HPPA_PCREL_CALL R_PCREL_CALL +#define R_HPPA_ABS_CALL R_ABS_CALL +#define R_HPPA_GOTOFF R_DP_RELATIVE +#define R_HPPA_ENTRY R_ENTRY +#define R_HPPA_EXIT R_EXIT +#define R_HPPA_COMPLEX R_COMP1 +#define R_HPPA_BEGIN_BRTAB R_BEGIN_BRTAB +#define R_HPPA_END_BRTAB R_END_BRTAB +#define R_HPPA_BEGIN_TRY R_BEGIN_TRY +#define R_HPPA_END_TRY R_END_TRY + +/* Exported functions, mostly for use by GAS. */ +boolean bfd_som_set_section_attributes PARAMS ((asection *, int, int, + unsigned int, int)); +boolean bfd_som_set_subsection_attributes PARAMS ((asection *, asection *, + int, unsigned int, int)); +void bfd_som_set_symbol_type PARAMS ((asymbol *, unsigned int)); +boolean bfd_som_attach_aux_hdr PARAMS ((bfd *, int, char *)); +int ** hppa_som_gen_reloc_type + PARAMS ((bfd *, int, int, enum hppa_reloc_field_selector_type_alt, + int, asymbol *)); +boolean bfd_som_attach_compilation_unit + PARAMS ((bfd *, const char *, const char *, const char *, const char *)); + +#endif /* _SOM_H */ |