19990502 sourceware importbinu_ss_19990502

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diff --git a/bfd/som.h b/bfd/som.h
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+/* 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 */