* som.h (struct som_symbol): Add new fields to hold additional

	information needed to build/write symbol tables and fixup streams.
	(struct som_section_data_struct): Add new fields to hold additional
	information needed to build/write space and subspace headers.
	(som_symbol_data): New accessor macro for SOM symbol information.
	(R_HPPA_*): Basic relocation types to be used by the assembler.

diff --git a/bfd/som.h b/bfd/som.h
new file mode 100644 (file)
index 0000000..1015943
--- /dev/null
+++ b/bfd/som.h
@@ -0,0 +1,155 @@
+/* HP PA-RISC SOM object file format:  definitions internal to BFD.
+   Copyright (C) 1990-1991 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#ifndef _SOM_H
+#define _SOM_H
+
+#include "../bfd/sysdep.h"
+
+#include <a.out.h>
+
+
+#ifdef HOST_HPPABSD
+/* 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;
+    short desc;
+    char other;
+    unsigned char type;
+    unsigned int som_type;
+
+    /* Structured like the ELF tc_data union.  Allows more code sharing
+       in GAS this way.  */
+    union
+      {
+       unsigned int hppa_arg_reloc;
+       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;
+
+    /* The unwind descriptor bits associated with R_ENTRY relocations
+       for functions (not enough room in a BFD reloc to store all the
+       information, so we tack it onto the symbol associated with the
+       function.  */
+    char *unwind;
+  }
+som_symbol_type;
+
+struct somdata
+  {
+    struct header *file_hdr;
+    som_symbol_type *symtab;
+    char *stringtab;
+
+    /* We remember these offsets so that after check_file_format, we have
+       no dependencies on the particular format of the exec_hdr.  */
+
+    file_ptr sym_filepos;
+    file_ptr str_filepos;
+    file_ptr reloc_filepos;
+
+    unsigned stringtab_size;
+  };
+
+struct som_data_struct
+  {
+    struct somdata a;
+  };
+
+/* 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.
+
+   The BFD section index may not exactly match a SOM subspace index,
+   for this reason we keep track of the original SOM subspace index
+   when a subspace is turned into a BFD section.  */
+
+struct som_section_data_struct
+  {
+    unsigned int reloc_size;
+    char *reloc_stream;
+    unsigned int subspace_index;
+    asection *containing_space;
+    int is_space;
+    struct space_dictionary_record space_dict;
+    int is_subspace;
+    struct subspace_dictionary_record subspace_dict;
+  };
+
+#define somdata(bfd)                   ((bfd)->tdata.som_data->a)
+#define obj_som_file_hdr(bfd)          (somdata(bfd).file_hdr)
+#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 som_section_data(sec) \
+  ((struct som_section_data_struct *)sec->used_by_bfd)
+#define som_symbol_data(symbol) \
+  (((som_symbol_type **) symbol->udata))
+
+
+/* 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_ABS_CALL                 R_ABS_CALL
+#define        R_HPPA_PCREL_CALL               R_PCREL_CALL
+#define        R_HPPA_GOTOFF                   R_DP_RELATIVE
+#define        R_HPPA_COMPLEX                  R_COMP1
+#define        R_HPPA_COMPLEX_PCREL_CALL       R_COMP2
+#define        R_HPPA_COMPLEX_ABS_CALL         R_COMP3
+#define R_HPPA_ENTRY                   R_ENTRY
+#define R_HPPA_EXIT                    R_EXIT
+
+#endif /* _SOM_H */