diff options
Diffstat (limited to 'bfd')
| -rw-r--r-- | bfd/som.h | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/bfd/som.h b/bfd/som.h new file mode 100644 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 */ |