| /* BFD ECOFF object file private structure. |
| Copyright 1993, 1994, 1995, 1996, 1999, 2001, 2002 |
| 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. */ |
| bfd_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. */ |
| bfd_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. */ |
| bfd_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. */ |
| bfd_boolean linker; |
| |
| /* TRUE if a warning that multiple global pointer values are |
| needed in the output binary was issued already. */ |
| bfd_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. */ |
| bfd_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. */ |
| bfd_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 an 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 bfd_boolean _bfd_ecoff_mkobject PARAMS ((bfd *)); |
| |
| /* Read in the ECOFF symbolic debugging information. */ |
| extern bfd_boolean _bfd_ecoff_slurp_symbolic_info |
| PARAMS ((bfd *, asection *, struct ecoff_debug_info *)); |
| |
| /* Generic ECOFF BFD backend vectors. */ |
| |
| extern bfd_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 bfd_boolean _bfd_ecoff_new_section_hook |
| PARAMS ((bfd *, asection *)); |
| extern bfd_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 bfd_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 bfd_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 bfd_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 bfd_boolean _bfd_ecoff_bfd_is_local_label_name |
| PARAMS ((bfd *, const char *)); |
| #define _bfd_ecoff_get_lineno _bfd_nosymbols_get_lineno |
| extern bfd_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 bfd_boolean _bfd_ecoff_set_arch_mach |
| PARAMS ((bfd *, enum bfd_architecture, unsigned long)); |
| extern bfd_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, bfd_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 *)); |
| #define _bfd_ecoff_bfd_link_hash_table_free _bfd_generic_link_hash_table_free |
| extern bfd_boolean _bfd_ecoff_bfd_link_add_symbols |
| PARAMS ((bfd *, struct bfd_link_info *)); |
| #define _bfd_ecoff_bfd_link_just_syms _bfd_generic_link_just_syms |
| extern bfd_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 bfd_boolean _bfd_ecoff_set_arch_mach_hook |
| PARAMS ((bfd *abfd, PTR filehdr)); |
| extern bfd_boolean _bfd_ecoff_styp_to_sec_flags |
| PARAMS ((bfd *, PTR, const char *, asection *, flagword *)); |
| extern bfd_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 *)); |