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[/] [open8_urisc/] [trunk/] [gnu/] [binutils/] [bfd/] [som.h] - Blame information for rev 148

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1 14 khays
/* HP PA-RISC SOM object file format:  definitions internal to BFD.
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   Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1998, 2000, 2001,
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   2002, 2003, 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
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   Contributed by the Center for Software Science at the
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   University of Utah (pa-gdb-bugs@cs.utah.edu).
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   This file is part of BFD, the Binary File Descriptor library.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program; if not, write to the Free Software
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   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
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   02110-1301, USA.  */
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#ifndef _SOM_H
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#define _SOM_H
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#include "libhppa.h"
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/* We want reloc.h to provide PA 2.0 defines.  */
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#define PA_2_0
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#include "som/aout.h"
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#include "som/lst.h"
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#include "som/internal.h"
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/* The SOM BFD backend doesn't currently use anything from these
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   two include files, but it's likely to need them in the future.  */
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#ifdef R_DLT_REL
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#include <shl.h>
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#include <dl.h>
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#endif
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#if defined (HOST_HPPABSD) || defined (HOST_HPPAOSF)
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/* BSD uses a completely different scheme for object file identification.
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   so for now, define _PA_RISC_ID to accept any random value for a model
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   number.  */
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#undef _PA_RISC_ID
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#define _PA_RISC_ID(__m_num) 1
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#endif /* HOST_HPPABSD */
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typedef struct som_symbol
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{
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  asymbol symbol;
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  unsigned int som_type;
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  /* Structured like the ELF tc_data union.  Allows more code sharing
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     in GAS this way.  */
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  union
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  {
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    struct
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    {
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      unsigned int hppa_arg_reloc;
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      unsigned int hppa_priv_level;
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    } ap;
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    PTR any;
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  }
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  tc_data;
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  /* Index of this symbol in the symbol table.  Only used when
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     building relocation streams for incomplete objects.  */
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  int index;
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  /* How many times this symbol is used in a relocation.  By sorting
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     the symbols from most used to least used we can significantly
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     reduce the size of the relocation stream for incomplete objects.  */
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  int reloc_count;
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  /* During object file writing, the offset of the name of this symbol
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     in the SOM string table.  */
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  int stringtab_offset;
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}
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som_symbol_type;
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/* A structure containing all the magic information stored in a BFD's
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   private data which needs to be copied during an objcopy/strip run.  */
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struct som_exec_data
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{
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  /* Sort-of a magic number.  BSD uses it to distinguish between
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     native executables and hpux executables.  */
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  short system_id;
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  /* Magic exec flags.  These control things like whether or not
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     null pointer dereferencing is allowed and the like.  */
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  long exec_flags;
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  /* We must preserve the version identifier too.  Some versions
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     of the HP linker do not grok NEW_VERSION_ID for reasons unknown.  */
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  unsigned int version_id;
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  /* Add more stuff here as needed.  Good examples of information
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     we might want to pass would be presumed_dp, entry_* and maybe
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     others from the file header.  */
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};
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struct somdata
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{
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  /* All the magic information about an executable which lives
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     in the private BFD structure and needs to be copied from
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     the input bfd to the output bfd during an objcopy/strip.  */
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  struct som_exec_data *exec_data;
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  /* These three fields are only used when writing files and are
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     generated from scratch.  They need not be copied for objcopy
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     or strip to work.  */
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  struct som_header *file_hdr;
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  struct som_string_auxhdr *copyright_aux_hdr;
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  struct som_string_auxhdr *version_aux_hdr;
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  struct som_exec_auxhdr *exec_hdr;
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  struct som_compilation_unit *comp_unit;
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  /* Pointers to a saved copy of the symbol and string tables.  These
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     need not be copied for objcopy or strip to work.  */
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  som_symbol_type *symtab;
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  char *stringtab;
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  asymbol **sorted_syms;
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  /* We remember these offsets so that after check_file_format, we have
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     no dependencies on the particular format of the exec_hdr.
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     These offsets need not be copied for objcopy or strip to work.  */
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  file_ptr sym_filepos;
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  file_ptr str_filepos;
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  file_ptr reloc_filepos;
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  unsigned stringtab_size;
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  void * line_info;
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};
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struct som_data_struct
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{
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  struct somdata a;
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};
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/* Substructure of som_section_data_struct used to hold information
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   which can't be represented by the generic BFD section structure,
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   but which must be copied during objcopy or strip.  */
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struct som_copyable_section_data_struct
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{
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  /* Various fields in space and subspace headers that we need
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     to pass around.  */
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  unsigned int sort_key : 8;
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  unsigned int access_control_bits : 7;
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  unsigned int is_defined : 1;
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  unsigned int is_private : 1;
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  unsigned int quadrant : 2;
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  unsigned int is_comdat : 1;
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  unsigned int is_common : 1;
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  unsigned int dup_common : 1;
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  /* For subspaces, this points to the section which represents the
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     space in which the subspace is contained.  For spaces it points
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     back to the section for this space.  */
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  asection *container;
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  /* The user-specified space number.  It is wrong to use this as
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     an index since duplicates and holes are allowed.  */
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  int space_number;
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  /* Add more stuff here as needed.  Good examples of information
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     we might want to pass would be initialization pointers,
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     and the many subspace flags we do not represent yet.  */
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};
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/* Used to keep extra SOM specific information for a given section.
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   reloc_size holds the size of the relocation stream, note this
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   is very different from the number of relocations as SOM relocations
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   are variable length.
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   reloc_stream is the actual stream of relocation entries.  */
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struct som_section_data_struct
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{
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  struct som_copyable_section_data_struct *copy_data;
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  unsigned int reloc_size;
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  unsigned char *reloc_stream;
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  struct som_space_dictionary_record *space_dict;
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  struct som_subspace_dictionary_record *subspace_dict;
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};
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#define somdata(bfd)                    ((bfd)->tdata.som_data->a)
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#define obj_som_exec_data(bfd)          (somdata (bfd).exec_data)
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#define obj_som_file_hdr(bfd)           (somdata (bfd).file_hdr)
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#define obj_som_exec_hdr(bfd)           (somdata (bfd).exec_hdr)
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#define obj_som_copyright_hdr(bfd)      (somdata (bfd).copyright_aux_hdr)
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#define obj_som_version_hdr(bfd)        (somdata (bfd).version_aux_hdr)
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#define obj_som_compilation_unit(bfd)   (somdata (bfd).comp_unit)
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#define obj_som_symtab(bfd)             (somdata (bfd).symtab)
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#define obj_som_stringtab(bfd)          (somdata (bfd).stringtab)
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#define obj_som_sym_filepos(bfd)        (somdata (bfd).sym_filepos)
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#define obj_som_str_filepos(bfd)        (somdata (bfd).str_filepos)
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#define obj_som_stringtab_size(bfd)     (somdata (bfd).stringtab_size)
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#define obj_som_reloc_filepos(bfd)      (somdata (bfd).reloc_filepos)
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#define obj_som_sorted_syms(bfd)        (somdata (bfd).sorted_syms)
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#define som_section_data(sec)      ((struct som_section_data_struct *) sec->used_by_bfd)
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#define som_symbol_data(symbol)         ((som_symbol_type *) symbol)
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/* Defines groups of basic relocations.  FIXME:  These should
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   be the only basic relocations created by GAS.  The rest
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   should be internal to the BFD backend.
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   The idea is both SOM and ELF define these basic relocation
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   types so they map into a SOM or ELF specific relocation as
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   appropriate.  This allows GAS to share much more code
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   between the two object formats.  */
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#define R_HPPA_NONE                     R_NO_RELOCATION
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#define R_HPPA                          R_CODE_ONE_SYMBOL
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#define R_HPPA_PCREL_CALL               R_PCREL_CALL
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#define R_HPPA_ABS_CALL                 R_ABS_CALL
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#define R_HPPA_GOTOFF                   R_DP_RELATIVE
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#define R_HPPA_ENTRY                    R_ENTRY
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#define R_HPPA_EXIT                     R_EXIT
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#define R_HPPA_COMPLEX                  R_COMP1
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#define R_HPPA_BEGIN_BRTAB              R_BEGIN_BRTAB
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#define R_HPPA_END_BRTAB                R_END_BRTAB
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#define R_HPPA_BEGIN_TRY                R_BEGIN_TRY
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#define R_HPPA_END_TRY                  R_END_TRY
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/* Exported functions, mostly for use by GAS.  */
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bfd_boolean  bfd_som_set_section_attributes    (asection *, int, int, unsigned int, int);
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bfd_boolean  bfd_som_set_subsection_attributes (asection *, asection *, int, unsigned int, int, int, int, int);
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void         bfd_som_set_symbol_type           (asymbol *, unsigned int);
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bfd_boolean  bfd_som_attach_aux_hdr            (bfd *, int, char *);
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int **       hppa_som_gen_reloc_type           (bfd *, int, int, enum hppa_reloc_field_selector_type_alt, int, asymbol *);
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bfd_boolean  bfd_som_attach_compilation_unit   (bfd *, const char *, const char *, const char *, const char *);
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#endif /* _SOM_H */

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