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- /* HP PA-RISC SOM object file format: definitions internal to BFD.
- Copyright (C) 1990-2022 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 3 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., 51 Franklin Street - Fifth Floor, Boston, MA
- 02110-1301, USA. */
- #ifndef _SOM_H
- #define _SOM_H
- #include "libhppa.h"
- /* We want reloc.h to provide PA 2.0 defines. */
- #define PA_2_0
- #include "som/aout.h"
- #include "som/lst.h"
- #include "som/internal.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
- #ifdef __cplusplus
- extern "C" {
- #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 */
- 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;
- void * 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;
- /* We must preserve the version identifier too. Some versions
- of the HP linker do not grok NEW_VERSION_ID for reasons unknown. */
- unsigned int version_id;
- /* 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 an 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 som_header *file_hdr;
- struct som_string_auxhdr *copyright_aux_hdr;
- struct som_string_auxhdr *version_aux_hdr;
- struct som_exec_auxhdr *exec_hdr;
- struct som_compilation_unit *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;
- void * line_info;
- };
- 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;
- unsigned int is_comdat : 1;
- unsigned int is_common : 1;
- unsigned int dup_common : 1;
- /* 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;
- unsigned char *reloc_stream;
- struct som_space_dictionary_record *space_dict;
- struct som_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 relocation 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. */
- bool bfd_som_set_section_attributes
- (asection *, int, int, unsigned int, int);
- bool bfd_som_set_subsection_attributes
- (asection *, asection *, int, unsigned int, int, int, int, int);
- void bfd_som_set_symbol_type
- (asymbol *, unsigned int);
- bool bfd_som_attach_aux_hdr
- (bfd *, int, char *);
- int **hppa_som_gen_reloc_type
- (bfd *, int, int, enum hppa_reloc_field_selector_type_alt, int, asymbol *);
- bool bfd_som_attach_compilation_unit
- (bfd *, const char *, const char *, const char *, const char *);
- asection *bfd_section_from_som_symbol
- (bfd *abfd, struct som_external_symbol_dictionary_record *symbol);
- #ifdef __cplusplus
- }
- #endif
- #endif /* _SOM_H */
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