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Diffstat (limited to 'bfd/libecoff.h')
| -rw-r--r-- | bfd/libecoff.h | 357 |
1 files changed, 357 insertions, 0 deletions
diff --git a/bfd/libecoff.h b/bfd/libecoff.h new file mode 100644 index 0000000..ad269a5 --- /dev/null +++ b/bfd/libecoff.h @@ -0,0 +1,357 @@ +/* BFD ECOFF object file private structure. + Copyright (C) 1993, 94, 95, 96, 1997 Free Software Foundation, Inc. + Written by Ian Lance Taylor, Cygnus Support. + +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. */ + +#include "bfdlink.h" + +#ifndef ECOFF_H +#include "coff/ecoff.h" +#endif + +/* This is the backend information kept for ECOFF files. This + structure is constant for a particular backend. The first element + is the COFF backend data structure, so that ECOFF targets can use + the generic COFF code. */ + +#define ecoff_backend(abfd) \ + ((struct ecoff_backend_data *) (abfd)->xvec->backend_data) + +struct ecoff_backend_data +{ + /* COFF backend information. This must be the first field. */ + bfd_coff_backend_data coff; + /* Supported architecture. */ + enum bfd_architecture arch; + /* Initial portion of armap string. */ + const char *armap_start; + /* The page boundary used to align sections in a demand-paged + executable file. E.g., 0x1000. */ + bfd_vma round; + /* True if the .rdata section is part of the text segment, as on the + Alpha. False if .rdata is part of the data segment, as on the + MIPS. */ + boolean rdata_in_text; + /* Bitsize of constructor entries. */ + unsigned int constructor_bitsize; + /* Reloc to use for constructor entries. */ + reloc_howto_type *constructor_reloc; + /* How to swap debugging information. */ + struct ecoff_debug_swap debug_swap; + /* External reloc size. */ + bfd_size_type external_reloc_size; + /* Reloc swapping functions. */ + void (*swap_reloc_in) PARAMS ((bfd *, PTR, struct internal_reloc *)); + void (*swap_reloc_out) PARAMS ((bfd *, const struct internal_reloc *, PTR)); + /* Backend reloc tweaking. */ + void (*adjust_reloc_in) PARAMS ((bfd *, const struct internal_reloc *, + arelent *)); + void (*adjust_reloc_out) PARAMS ((bfd *, const arelent *, + struct internal_reloc *)); + /* Relocate section contents while linking. */ + boolean (*relocate_section) PARAMS ((bfd *output_bfd, struct bfd_link_info *, + bfd *input_bfd, asection *input_section, + bfd_byte *contents, + PTR external_relocs)); + /* Do final adjustments to filehdr and aouthdr. */ + boolean (*adjust_headers) PARAMS ((bfd *, struct internal_filehdr *, + struct internal_aouthdr *)); + /* Read an element from an archive at a given file position. This + is needed because OSF/1 3.2 uses a weird archive format. */ + bfd *(*get_elt_at_filepos) PARAMS ((bfd *, file_ptr)); +}; + +/* This is the target specific information kept for ECOFF files. */ + +#define ecoff_data(abfd) ((abfd)->tdata.ecoff_obj_data) + +typedef struct ecoff_tdata +{ + /* The reloc file position, set by + ecoff_compute_section_file_positions. */ + file_ptr reloc_filepos; + + /* The symbol table file position, set by _bfd_ecoff_mkobject_hook. */ + file_ptr sym_filepos; + + /* The start and end of the text segment. Only valid for an + existing file, not for one we are creating. */ + unsigned long text_start; + unsigned long text_end; + + /* The cached gp value. This is used when relocating. */ + bfd_vma gp; + + /* The maximum size of objects to optimize using gp. This is + typically set by the -G option to the compiler, assembler or + linker. */ + unsigned int gp_size; + + /* The register masks. When linking, all the masks found in the + input files are combined into the masks of the output file. + These are not all used for all targets, but that's OK, because + the relevant ones are the only ones swapped in and out. */ + unsigned long gprmask; + unsigned long fprmask; + unsigned long cprmask[4]; + + /* The ECOFF symbolic debugging information. */ + struct ecoff_debug_info debug_info; + + /* The unswapped ECOFF symbolic information. */ + PTR raw_syments; + + /* The canonical BFD symbols. */ + struct ecoff_symbol_struct *canonical_symbols; + + /* A mapping from external symbol numbers to entries in the linker + hash table, used when linking. */ + struct ecoff_link_hash_entry **sym_hashes; + + /* A mapping from reloc symbol indices to sections, used when + linking. */ + asection **symndx_to_section; + + /* True if this BFD was written by the backend linker. */ + boolean linker; + + /* True if a warning that multiple global pointer values are + needed in the output binary was issued already. */ + boolean issued_multiple_gp_warning; + + /* Used by find_nearest_line entry point. The structure could be + included directly in this one, but there's no point to wasting + the memory just for the infrequently called find_nearest_line. */ + struct ecoff_find_line *find_line_info; + + /* Whether the .rdata section is in the text segment for this + particular ECOFF file. This is not valid until + ecoff_compute_section_file_positions is called. */ + boolean rdata_in_text; + +} ecoff_data_type; + +/* Each canonical asymbol really looks like this. */ + +typedef struct ecoff_symbol_struct +{ + /* The actual symbol which the rest of BFD works with */ + asymbol symbol; + + /* The fdr for this symbol. */ + FDR *fdr; + + /* true if this is a local symbol rather than an external one. */ + boolean local; + + /* A pointer to the unswapped hidden information for this symbol. + This is either a struct sym_ext or a struct ext_ext, depending on + the value of the local field above. */ + PTR native; +} ecoff_symbol_type; + +/* We take the address of the first element of a asymbol to ensure that the + macro is only ever applied to an asymbol. */ +#define ecoffsymbol(asymbol) ((ecoff_symbol_type *) (&((asymbol)->the_bfd))) + +/* We need to save the index of an external symbol when we write it + out so that can set the symbol index correctly when we write out + the relocs. */ +#define ecoff_get_sym_index(symbol) ((symbol)->udata.i) +#define ecoff_set_sym_index(symbol, idx) ((symbol)->udata.i = (idx)) + +/* When generating MIPS embedded PIC code, the linker relaxes the code + to turn PC relative branches into longer code sequences when the PC + relative branch is out of range. This involves reading the relocs + in bfd_relax_section as well as in bfd_final_link, and requires the + code to keep track of which relocs have been expanded. A pointer + to this structure is put in the used_by_bfd pointer of a section to + keep track of this information. The user_by_bfd pointer will be + NULL if the information was not needed. */ + +struct ecoff_section_tdata +{ + /* The unswapped relocs for this section. These are stored in + memory so the input file does not have to be read twice. */ + PTR external_relocs; + + /* The contents of the section. These bytes may or may not be saved + in memory, but if it is this is a pointer to them. */ + bfd_byte *contents; + + /* Offset adjustments for PC relative branches. A number other than + 1 is an addend for a PC relative branch, or a switch table entry + which is the difference of two .text locations; this addend + arises because the branch or difference crosses one or more + branches which were expanded into a larger code sequence. A 1 + means that this branch was itself expanded into a larger code + sequence. 1 is not a possible offset, since all offsets must be + multiples of the instruction size, which is 4; also, the only + relocs with non-zero offsets will be PC relative branches or + switch table entries within the same object file. If this field + is NULL, no branches were expanded and no offsets are required. + Otherwise there are as many entries as there are relocs in the + section, and the entry for any reloc that is not PC relative is + zero. */ + long *offsets; + + /* When producing an executable (i.e., final, non-relocatable link) + on the Alpha, we may need to use multiple global pointer values + to span the entire .lita section. In essence, we allow each + input .lita section to have its own gp value. To support this, + we need to keep track of the gp values that we picked for each + input .lita section . */ + bfd_vma gp; +}; + +/* An accessor macro for the ecoff_section_tdata structure. */ +#define ecoff_section_data(abfd, sec) \ + ((struct ecoff_section_tdata *) (sec)->used_by_bfd) + +/* ECOFF linker hash table entries. */ + +struct ecoff_link_hash_entry +{ + struct bfd_link_hash_entry root; + /* Symbol index in output file. */ + long indx; + /* BFD that ext field value came from. */ + bfd *abfd; + /* ECOFF external symbol information. */ + EXTR esym; + /* Nonzero if this symbol has been written out. */ + char written; + /* Nonzero if this symbol was referred to as small undefined. */ + char small; +}; + +/* ECOFF linker hash table. */ + +struct ecoff_link_hash_table +{ + struct bfd_link_hash_table root; +}; + +/* Make an ECOFF object. */ +extern boolean _bfd_ecoff_mkobject PARAMS ((bfd *)); + +/* Read in the ECOFF symbolic debugging information. */ +extern boolean _bfd_ecoff_slurp_symbolic_info + PARAMS ((bfd *, asection *, struct ecoff_debug_info *)); + +/* Generic ECOFF BFD backend vectors. */ + +extern boolean _bfd_ecoff_write_object_contents PARAMS ((bfd *abfd)); +extern const bfd_target *_bfd_ecoff_archive_p PARAMS ((bfd *abfd)); + +#define _bfd_ecoff_close_and_cleanup _bfd_generic_close_and_cleanup +#define _bfd_ecoff_bfd_free_cached_info _bfd_generic_bfd_free_cached_info +extern boolean _bfd_ecoff_new_section_hook + PARAMS ((bfd *, asection *)); +extern boolean _bfd_ecoff_get_section_contents + PARAMS ((bfd *, asection *, PTR location, file_ptr, bfd_size_type)); + +#define _bfd_ecoff_bfd_link_split_section _bfd_generic_link_split_section + +extern boolean _bfd_ecoff_bfd_copy_private_bfd_data PARAMS ((bfd *, bfd *)); +#define _bfd_ecoff_bfd_copy_private_section_data \ + _bfd_generic_bfd_copy_private_section_data + +#define _bfd_ecoff_bfd_copy_private_symbol_data \ + _bfd_generic_bfd_copy_private_symbol_data + +#define _bfd_ecoff_bfd_print_private_bfd_data \ + _bfd_generic_bfd_print_private_bfd_data + +#define _bfd_ecoff_bfd_merge_private_bfd_data \ + _bfd_generic_bfd_merge_private_bfd_data + +#define _bfd_ecoff_bfd_set_private_flags _bfd_generic_bfd_set_private_flags +extern boolean _bfd_ecoff_slurp_armap PARAMS ((bfd *abfd)); +#define _bfd_ecoff_slurp_extended_name_table _bfd_slurp_extended_name_table +#define _bfd_ecoff_construct_extended_name_table \ + _bfd_archive_bsd_construct_extended_name_table +#define _bfd_ecoff_truncate_arname bfd_dont_truncate_arname +extern boolean _bfd_ecoff_write_armap + PARAMS ((bfd *, unsigned int, struct orl *, unsigned int, int)); +#define _bfd_ecoff_read_ar_hdr _bfd_generic_read_ar_hdr +#define _bfd_ecoff_openr_next_archived_file \ + bfd_generic_openr_next_archived_file +#define _bfd_ecoff_get_elt_at_index _bfd_generic_get_elt_at_index +#define _bfd_ecoff_generic_stat_arch_elt bfd_generic_stat_arch_elt +#define _bfd_ecoff_update_armap_timestamp bfd_true + +extern long _bfd_ecoff_get_symtab_upper_bound PARAMS ((bfd *abfd)); +extern long _bfd_ecoff_get_symtab PARAMS ((bfd *abfd, asymbol **alocation)); +extern asymbol *_bfd_ecoff_make_empty_symbol PARAMS ((bfd *abfd)); +extern void _bfd_ecoff_print_symbol + PARAMS ((bfd *, PTR filep, asymbol *, bfd_print_symbol_type)); +extern void _bfd_ecoff_get_symbol_info + PARAMS ((bfd *, asymbol *, symbol_info *)); +extern boolean _bfd_ecoff_bfd_is_local_label_name + PARAMS ((bfd *, const char *)); +#define _bfd_ecoff_get_lineno _bfd_nosymbols_get_lineno +extern boolean _bfd_ecoff_find_nearest_line + PARAMS ((bfd *, asection *, asymbol **, bfd_vma offset, + const char **filename_ptr, const char **fnname_ptr, + unsigned int *retline_ptr)); +#define _bfd_ecoff_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol +#define _bfd_ecoff_read_minisymbols _bfd_generic_read_minisymbols +#define _bfd_ecoff_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol + +#define _bfd_ecoff_get_reloc_upper_bound coff_get_reloc_upper_bound +extern long _bfd_ecoff_canonicalize_reloc + PARAMS ((bfd *, asection *, arelent **, asymbol **symbols)); +/* ecoff_bfd_reloc_type_lookup defined by backend. */ + +extern boolean _bfd_ecoff_set_arch_mach + PARAMS ((bfd *, enum bfd_architecture, unsigned long machine)); +extern boolean _bfd_ecoff_set_section_contents + PARAMS ((bfd *, asection *, PTR location, file_ptr, bfd_size_type)); + +extern int _bfd_ecoff_sizeof_headers PARAMS ((bfd *abfd, boolean reloc)); +/* ecoff_bfd_get_relocated_section_contents defined by backend. */ +/* ecoff_bfd_relax_section defined by backend. */ +extern struct bfd_link_hash_table *_bfd_ecoff_bfd_link_hash_table_create + PARAMS ((bfd *)); +extern boolean _bfd_ecoff_bfd_link_add_symbols + PARAMS ((bfd *, struct bfd_link_info *)); +extern boolean _bfd_ecoff_bfd_final_link + PARAMS ((bfd *, struct bfd_link_info *)); + +/* Hook functions for the generic COFF section reading code. */ + +extern PTR _bfd_ecoff_mkobject_hook PARAMS ((bfd *, PTR filehdr, PTR aouthdr)); +#define _bfd_ecoff_set_alignment_hook \ + ((void (*) PARAMS ((bfd *, asection *, PTR))) bfd_void) +extern boolean _bfd_ecoff_set_arch_mach_hook PARAMS ((bfd *abfd, PTR filehdr)); +extern flagword _bfd_ecoff_styp_to_sec_flags + PARAMS ((bfd *abfd, PTR hdr, const char *name)); +extern boolean _bfd_ecoff_slurp_symbol_table PARAMS ((bfd *abfd)); + +/* ECOFF auxiliary information swapping routines. These are the same + for all ECOFF targets, so they are defined in ecofflink.c. */ + +extern void _bfd_ecoff_swap_tir_in + PARAMS ((int, const struct tir_ext *, TIR *)); +extern void _bfd_ecoff_swap_tir_out + PARAMS ((int, const TIR *, struct tir_ext *)); +extern void _bfd_ecoff_swap_rndx_in + PARAMS ((int, const struct rndx_ext *, RNDXR *)); +extern void _bfd_ecoff_swap_rndx_out + PARAMS ((int, const RNDXR *, struct rndx_ext *)); |