/* BFD ECOFF object file private structure.
- Copyright (C) 1993 Free Software Foundation, Inc.
+ Copyright (C) 1993, 94, 95, 96, 97, 1999 Free Software Foundation, Inc.
Written by Ian Lance Taylor, Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
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. */
+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. ECOFF already
- keeps a bfd_coff_backend_data structure in the bfd_target
- backend_data field, so a pointer to this backend structure is kept
- in the tdata field. */
+ 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) (ecoff_data (abfd)->backend_data)
+#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;
- /* Big endian magic number. */
- int big_magic;
- /* Little endian magic number. */
- int little_magic;
- /* Alignment of debugging information. E.g., 4. */
- bfd_size_type debug_align;
+ /* 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;
- /* Sizes of external symbolic information. */
- bfd_size_type external_hdr_size;
- bfd_size_type external_dnr_size;
- bfd_size_type external_pdr_size;
- bfd_size_type external_sym_size;
- bfd_size_type external_opt_size;
- bfd_size_type external_fdr_size;
- bfd_size_type external_rfd_size;
- bfd_size_type external_ext_size;
- /* Functions to swap in external symbolic data. */
- void (*swap_hdr_in) PARAMS ((bfd *, PTR, HDRR *));
- void (*swap_dnr_in) PARAMS ((bfd *, PTR, DNR *));
- void (*swap_pdr_in) PARAMS ((bfd *, PTR, PDR *));
- void (*swap_sym_in) PARAMS ((bfd *, PTR, SYMR *));
- void (*swap_opt_in) PARAMS ((bfd *, PTR, OPTR *));
- void (*swap_fdr_in) PARAMS ((bfd *, PTR, FDR *));
- void (*swap_rfd_in) PARAMS ((bfd *, PTR, RFDT *));
- void (*swap_ext_in) PARAMS ((bfd *, PTR, EXTR *));
- /* Functions to swap out external symbolic data. */
- void (*swap_hdr_out) PARAMS ((bfd *, const HDRR *, PTR));
- void (*swap_dnr_out) PARAMS ((bfd *, const DNR *, PTR));
- void (*swap_pdr_out) PARAMS ((bfd *, const PDR *, PTR));
- void (*swap_sym_out) PARAMS ((bfd *, const SYMR *, PTR));
- void (*swap_opt_out) PARAMS ((bfd *, const OPTR *, PTR));
- void (*swap_fdr_out) PARAMS ((bfd *, const FDR *, PTR));
- void (*swap_rfd_out) PARAMS ((bfd *, const RFDT *, PTR));
- void (*swap_ext_out) PARAMS ((bfd *, const EXTR *, PTR));
- /* It so happens that the auxiliary type information has the same
- type and format for all known ECOFF targets. I don't see any
- reason that that should change, so at least for now the auxiliary
- swapping information is not in this table. */
+ /* 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. */
typedef struct ecoff_tdata
{
- /* Constant backend information. */
- const struct ecoff_backend_data *backend_data;
-
/* The reloc file position, set by
ecoff_compute_section_file_positions. */
file_ptr reloc_filepos;
- /* The symbol table file position, set by ecoff_mkobject_hook. */
+ /* 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
/* The maximum size of objects to optimize using gp. This is
typically set by the -G option to the compiler, assembler or
linker. */
- int gp_size;
+ 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. */
+ 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 size of the unswapped ECOFF symbolic information. */
- bfd_size_type raw_size;
+ /* The ECOFF symbolic debugging information. */
+ struct ecoff_debug_info debug_info;
/* The unswapped ECOFF symbolic information. */
PTR raw_syments;
- /* The swapped ECOFF symbolic header. */
- HDRR symbolic_header;
-
- /* Pointers to the unswapped symbolic information. */
- unsigned char *line;
- PTR external_dnr; /* struct dnr_ext */
- PTR external_pdr; /* struct pdr_ext */
- PTR external_sym; /* struct sym_ext */
- PTR external_opt; /* struct opt_ext */
- union aux_ext *external_aux;
- char *ss;
- char *ssext;
- PTR external_fdr; /* struct fdr_ext */
- PTR external_rfd; /* struct rfd_ext */
- PTR external_ext; /* struct ext_ext */
-
- /* The swapped FDR information. */
- FDR *fdr;
-
- /* The FDR index. This is set for an input BFD to a link so that
- the external symbols can set their FDR index correctly. */
- unsigned int ifdbase;
-
/* 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. */
macro is only ever applied to an asymbol. */
#define ecoffsymbol(asymbol) ((ecoff_symbol_type *) (&((asymbol)->the_bfd)))
-/* This is a hack borrowed from coffcode.h; 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) ((unsigned long) (symbol)->udata)
-#define ecoff_set_sym_index(symbol, idx) ((symbol)->udata = (PTR) (idx))
+/* 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;
+};
-/* Make an empty ECOFF symbol. */
-extern asymbol *ecoff_make_empty_symbol PARAMS ((bfd *abfd));
+/* 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 ecoff_slurp_symbolic_info PARAMS ((bfd *));
+extern boolean _bfd_ecoff_slurp_symbolic_info
+ PARAMS ((bfd *, asection *, struct ecoff_debug_info *));
/* Generic ECOFF BFD backend vectors. */
-extern unsigned int ecoff_get_symtab_upper_bound PARAMS ((bfd *abfd));
-extern unsigned int ecoff_get_symtab PARAMS ((bfd *abfd,
- asymbol **alocation));
-extern void ecoff_get_symbol_info PARAMS ((bfd *abfd,
- asymbol *symbol,
- symbol_info *ret));
-extern void ecoff_print_symbol PARAMS ((bfd *abfd, PTR filep,
- asymbol *symbol,
- bfd_print_symbol_type how));
-extern unsigned int ecoff_canonicalize_reloc PARAMS ((bfd *abfd,
- asection *section,
- arelent **relptr,
- asymbol **symbols));
-extern CONST struct reloc_howto_struct *ecoff_bfd_reloc_type_lookup
- PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
-extern boolean ecoff_find_nearest_line PARAMS ((bfd *abfd,
- asection *section,
- asymbol **symbols,
- bfd_vma offset,
- CONST char **filename_ptr,
- CONST char **fnname_ptr,
- unsigned int *retline_ptr));
-extern boolean ecoff_bfd_seclet_link PARAMS ((bfd *abfd, PTR data,
- boolean relocateable));
-extern boolean ecoff_set_arch_mach PARAMS ((bfd *abfd,
- enum bfd_architecture arch,
- unsigned long machine));
-extern int ecoff_sizeof_headers PARAMS ((bfd *abfd, boolean reloc));
-extern boolean ecoff_set_section_contents PARAMS ((bfd *abfd,
- asection *section,
- PTR location,
- file_ptr offset,
- bfd_size_type count));
-extern boolean ecoff_write_object_contents PARAMS ((bfd *abfd));
-extern boolean ecoff_slurp_armap PARAMS ((bfd *abfd));
-extern boolean ecoff_write_armap PARAMS ((bfd *abfd, unsigned int elength,
- struct orl *map,
- unsigned int orl_count,
- int stridx));
-#define ecoff_slurp_extended_name_table _bfd_slurp_extended_name_table
-extern bfd_target *ecoff_archive_p PARAMS ((bfd *abfd));
-#define ecoff_get_lineno \
- ((alent *(*) PARAMS ((bfd *, asymbol *))) bfd_nullvoidptr)
-#define ecoff_truncate_arname bfd_dont_truncate_arname
-#define ecoff_openr_next_archived_file bfd_generic_openr_next_archived_file
-#define ecoff_generic_stat_arch_elt bfd_generic_stat_arch_elt
-#define ecoff_get_section_contents bfd_generic_get_section_contents
-#define ecoff_get_reloc_upper_bound coff_get_reloc_upper_bound
-#define ecoff_close_and_cleanup bfd_generic_close_and_cleanup
-#define ecoff_bfd_debug_info_start bfd_void
-#define ecoff_bfd_debug_info_end bfd_void
-#define ecoff_bfd_debug_info_accumulate \
- ((void (*) PARAMS ((bfd *, struct sec *))) bfd_void)
-#define ecoff_bfd_get_relocated_section_contents \
- bfd_generic_get_relocated_section_contents
-#define ecoff_bfd_relax_section bfd_generic_relax_section
-#define ecoff_bfd_make_debug_symbol \
- ((asymbol *(*) PARAMS ((bfd *, void *, unsigned long))) bfd_nullvoidptr)
+
+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 asection *ecoff_make_section_hook PARAMS ((bfd *abfd, char *name));
-extern boolean ecoff_new_section_hook PARAMS ((bfd *abfd,
- asection *section));
-#define ecoff_set_alignment_hook \
+
+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 ecoff_set_arch_mach_hook PARAMS ((bfd *abfd, PTR filehdr));
-extern long ecoff_sec_to_styp_flags PARAMS ((CONST char *name,
- flagword flags));
-extern flagword ecoff_styp_to_sec_flags PARAMS ((bfd *abfd, PTR hdr));
-extern boolean ecoff_slurp_symbol_table PARAMS ((bfd *abfd));
+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, asection *section));
+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 *));