69645d10fb
* cofflink.c: New file. * libcoff-in.h: Include bfdlink.h. (obj_coff_external_syms, obj_coff_strings): Define accessor macro. (obj_coff_sym_hashes): Define accessor macro. (struct coff_tdata): Add fields external_syms, strings, and sym_hashes. (struct coff_link_hash_entry): Define. (struct coff_link_hash_table): Define. (coff_link_hash_lookup, coff_link_hash_traverse): Define. (coff_hash_table): Define. (_bfd_coff_link_hash_table_create): Declare. (_bfd_coff_link_add_symbols, _bfd_coff_final_link): Declare. * coffcode.h (bfd_coff_backend_data): Add fields _bfd_relsz, _bfd_coff_swap_reloc_in, _bfd_coff_sym_is_global, _bfd_coff_compute_section_file_positions, _bfd_coff_relocate_section. (bfd_coff_relsz, bfd_coff_swap_reloc_in): Define. (bfd_coff_sym_is_global): Define. (bfd_coff_compute_section_file_positions): Define. (bfd_coff_relocate_section): Define. (coff_mkobject_hook): Initialize obj_raw_syment_count and obj_conv_table_size. (coff_compute_section_file_positions): Set target_index of all sections. Set output_has_begun field. (coff_write_object_contents): Don't set target_index; now done by coff_compute_section_file_positions. Remove obsolete handling of scn_base and data_base. Don't bother to check that target_index is positive, since it always is. Remove use of pad, which is always zero. Check obj_raw_syment_count, not bfd_get_symcount, for the number of symbols, but only write them out if bfd_get_symcount is non-zero. (coff_slurp_symbol_table): Use obj_raw_syment_count, not bfd_get_symcount for the number of symbols. Don't set obj_conv_table_size. (coff_sym_is_global): New static function or macro. (coff_slurp_reloc_table): Call coff_swap_reloc_in, not bfd_swap_reloc_in. (coff_bfd_link_hash_table_create): If coff_relocate_section is defined, define as _bfd_coff_link_hash_table_create. (coff_bfd_link_add_symbols): Similar change. (coff_bfd_final_link): Similar change. (coff_relocate_section): Define as NULL if not defined. (bfd_coff_std_swap_table): Initialize new fields. * coffgen.c (coff_real_object_p): Don't set obj_raw_syment_count and obj_conv_table_size here. (coff_count_linenumbers): Reindent. If bfd_get_symcount is zero, add up the line numbers from the sections. (coff_write_symbols): Don't set bfd_get_symcount. (coff_pointerize_aux): Don't pointerize a nonpositive x_endndx field. (coff_get_normalized_symtab): Use obj_raw_syment_count, not bfd_get_symcount. (coff_print_symbol): If auxp->fix_end, print x_endndx value. * coffswap.h (coff_swap_reloc_in): Rename from bfd_swap_reloc_in. Reindent. Change argument type to PTR. * coff-a29k.c (coff_a29k_relocate_section): New static function. (coff_relocate_section): Define. * configure.in (a29kcoff_big_vec): Compile cofflink.o. * coff-alpha.c (alpha_ecoff_backend_data): Initialize new fields. * coff-mips.c (mips_ecoff_backend_data): Likewise. * libcoff.h: Rebuilt. * Makefile.in: Rebuilt dependencies. (BFD32_BACKENDS): Add cofflink.o. (CFILES): Add cofflink.c.
2077 lines
60 KiB
C
2077 lines
60 KiB
C
/* BFD back-end for ALPHA Extended-Coff files.
|
||
Copyright 1993, 1994 Free Software Foundation, Inc.
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Modified from coff-mips.c by Steve Chamberlain <sac@cygnus.com> and
|
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Ian Lance Taylor <ian@cygnus.com>.
|
||
|
||
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. */
|
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#include "bfd.h"
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#include "sysdep.h"
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#include "bfdlink.h"
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#include "libbfd.h"
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#include "coff/internal.h"
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#include "coff/sym.h"
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#include "coff/symconst.h"
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#include "coff/ecoff.h"
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#include "coff/alpha.h"
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#include "libcoff.h"
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#include "libecoff.h"
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/* Prototypes for static functions. */
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static const bfd_target *alpha_ecoff_object_p PARAMS ((bfd *));
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static boolean alpha_ecoff_bad_format_hook PARAMS ((bfd *abfd, PTR filehdr));
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static PTR alpha_ecoff_mkobject_hook PARAMS ((bfd *, PTR filehdr, PTR aouthdr));
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static void alpha_ecoff_swap_reloc_in PARAMS ((bfd *, PTR,
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struct internal_reloc *));
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static void alpha_ecoff_swap_reloc_out PARAMS ((bfd *,
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const struct internal_reloc *,
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PTR));
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static void alpha_adjust_reloc_in PARAMS ((bfd *,
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const struct internal_reloc *,
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arelent *));
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static void alpha_adjust_reloc_out PARAMS ((bfd *, const arelent *,
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struct internal_reloc *));
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static bfd_byte *alpha_ecoff_get_relocated_section_contents
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PARAMS ((bfd *abfd, struct bfd_link_info *, struct bfd_link_order *,
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bfd_byte *data, boolean relocateable, asymbol **symbols));
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static bfd_vma alpha_convert_external_reloc
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PARAMS ((bfd *, struct bfd_link_info *, bfd *, struct external_reloc *,
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struct ecoff_link_hash_entry *));
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static boolean alpha_relocate_section PARAMS ((bfd *, struct bfd_link_info *,
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bfd *, asection *,
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bfd_byte *, PTR));
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/* ECOFF has COFF sections, but the debugging information is stored in
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a completely different format. ECOFF targets use some of the
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swapping routines from coffswap.h, and some of the generic COFF
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routines in coffgen.c, but, unlike the real COFF targets, do not
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use coffcode.h itself.
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Get the generic COFF swapping routines, except for the reloc,
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symbol, and lineno ones. Give them ecoff names. Define some
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accessor macros for the large sizes used for Alpha ECOFF. */
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#define GET_FILEHDR_SYMPTR bfd_h_get_64
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#define PUT_FILEHDR_SYMPTR bfd_h_put_64
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#define GET_AOUTHDR_TSIZE bfd_h_get_64
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#define PUT_AOUTHDR_TSIZE bfd_h_put_64
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#define GET_AOUTHDR_DSIZE bfd_h_get_64
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#define PUT_AOUTHDR_DSIZE bfd_h_put_64
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#define GET_AOUTHDR_BSIZE bfd_h_get_64
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#define PUT_AOUTHDR_BSIZE bfd_h_put_64
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#define GET_AOUTHDR_ENTRY bfd_h_get_64
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#define PUT_AOUTHDR_ENTRY bfd_h_put_64
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#define GET_AOUTHDR_TEXT_START bfd_h_get_64
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#define PUT_AOUTHDR_TEXT_START bfd_h_put_64
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#define GET_AOUTHDR_DATA_START bfd_h_get_64
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#define PUT_AOUTHDR_DATA_START bfd_h_put_64
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#define GET_SCNHDR_PADDR bfd_h_get_64
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#define PUT_SCNHDR_PADDR bfd_h_put_64
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#define GET_SCNHDR_VADDR bfd_h_get_64
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#define PUT_SCNHDR_VADDR bfd_h_put_64
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#define GET_SCNHDR_SIZE bfd_h_get_64
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#define PUT_SCNHDR_SIZE bfd_h_put_64
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#define GET_SCNHDR_SCNPTR bfd_h_get_64
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#define PUT_SCNHDR_SCNPTR bfd_h_put_64
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#define GET_SCNHDR_RELPTR bfd_h_get_64
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#define PUT_SCNHDR_RELPTR bfd_h_put_64
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#define GET_SCNHDR_LNNOPTR bfd_h_get_64
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#define PUT_SCNHDR_LNNOPTR bfd_h_put_64
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#define ALPHAECOFF
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#define NO_COFF_RELOCS
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#define NO_COFF_SYMBOLS
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#define NO_COFF_LINENOS
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#define coff_swap_filehdr_in alpha_ecoff_swap_filehdr_in
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#define coff_swap_filehdr_out alpha_ecoff_swap_filehdr_out
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#define coff_swap_aouthdr_in alpha_ecoff_swap_aouthdr_in
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#define coff_swap_aouthdr_out alpha_ecoff_swap_aouthdr_out
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#define coff_swap_scnhdr_in alpha_ecoff_swap_scnhdr_in
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#define coff_swap_scnhdr_out alpha_ecoff_swap_scnhdr_out
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#include "coffswap.h"
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/* Get the ECOFF swapping routines. */
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#define ECOFF_64
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#include "ecoffswap.h"
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/* How to process the various reloc types. */
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static bfd_reloc_status_type
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reloc_nil PARAMS ((bfd *, arelent *, asymbol *, PTR,
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asection *, bfd *, char **));
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static bfd_reloc_status_type
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reloc_nil (abfd, reloc, sym, data, sec, output_bfd, error_message)
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bfd *abfd;
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arelent *reloc;
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asymbol *sym;
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PTR data;
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asection *sec;
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bfd *output_bfd;
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char **error_message;
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{
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return bfd_reloc_ok;
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}
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/* In case we're on a 32-bit machine, construct a 64-bit "-1" value
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from smaller values. Start with zero, widen, *then* decrement. */
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#define MINUS_ONE (((bfd_vma)0) - 1)
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static reloc_howto_type alpha_howto_table[] =
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{
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/* Reloc type 0 is ignored by itself. However, it appears after a
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GPDISP reloc to identify the location where the low order 16 bits
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of the gp register are loaded. */
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HOWTO (ALPHA_R_IGNORE, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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true, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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reloc_nil, /* special_function */
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"IGNORE", /* name */
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true, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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true), /* pcrel_offset */
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/* A 32 bit reference to a symbol. */
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HOWTO (ALPHA_R_REFLONG, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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0, /* special_function */
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"REFLONG", /* name */
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true, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* A 64 bit reference to a symbol. */
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HOWTO (ALPHA_R_REFQUAD, /* type */
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0, /* rightshift */
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4, /* size (0 = byte, 1 = short, 2 = long) */
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64, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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0, /* special_function */
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"REFQUAD", /* name */
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true, /* partial_inplace */
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MINUS_ONE, /* src_mask */
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MINUS_ONE, /* dst_mask */
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false), /* pcrel_offset */
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/* A 32 bit GP relative offset. This is just like REFLONG except
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that when the value is used the value of the gp register will be
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added in. */
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HOWTO (ALPHA_R_GPREL32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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0, /* special_function */
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"GPREL32", /* name */
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true, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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false), /* pcrel_offset */
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/* Used for an instruction that refers to memory off the GP
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register. The offset is 16 bits of the 32 bit instruction. This
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reloc always seems to be against the .lita section. */
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HOWTO (ALPHA_R_LITERAL, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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0, /* special_function */
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"LITERAL", /* name */
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true, /* partial_inplace */
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0xffff, /* src_mask */
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0xffff, /* dst_mask */
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false), /* pcrel_offset */
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/* This reloc only appears immediately following a LITERAL reloc.
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It identifies a use of the literal. It seems that the linker can
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use this to eliminate a portion of the .lita section. The symbol
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index is special: 1 means the literal address is in the base
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register of a memory format instruction; 2 means the literal
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address is in the byte offset register of a byte-manipulation
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instruction; 3 means the literal address is in the target
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register of a jsr instruction. This does not actually do any
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relocation. */
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HOWTO (ALPHA_R_LITUSE, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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false, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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reloc_nil, /* special_function */
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"LITUSE", /* name */
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false, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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false), /* pcrel_offset */
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/* Load the gp register. This is always used for a ldah instruction
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which loads the upper 16 bits of the gp register. The next reloc
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will be an IGNORE reloc which identifies the location of the lda
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instruction which loads the lower 16 bits. The symbol index of
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the GPDISP instruction appears to actually be the number of bytes
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between the ldah and lda instructions. This gives two different
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ways to determine where the lda instruction is; I don't know why
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both are used. The value to use for the relocation is the
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difference between the GP value and the current location; the
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load will always be done against a register holding the current
|
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address. */
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HOWTO (ALPHA_R_GPDISP, /* type */
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16, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
|
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true, /* pc_relative */
|
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0, /* bitpos */
|
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complain_overflow_dont, /* complain_on_overflow */
|
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reloc_nil, /* special_function */
|
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"GPDISP", /* name */
|
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true, /* partial_inplace */
|
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0xffff, /* src_mask */
|
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0xffff, /* dst_mask */
|
||
true), /* pcrel_offset */
|
||
|
||
/* A 21 bit branch. The native assembler generates these for
|
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branches within the text segment, and also fills in the PC
|
||
relative offset in the instruction. */
|
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HOWTO (ALPHA_R_BRADDR, /* type */
|
||
2, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
21, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
0, /* special_function */
|
||
"BRADDR", /* name */
|
||
true, /* partial_inplace */
|
||
0x1fffff, /* src_mask */
|
||
0x1fffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* A hint for a jump to a register. */
|
||
HOWTO (ALPHA_R_HINT, /* type */
|
||
2, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
14, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
0, /* special_function */
|
||
"HINT", /* name */
|
||
true, /* partial_inplace */
|
||
0x3fff, /* src_mask */
|
||
0x3fff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 16 bit PC relative offset. */
|
||
HOWTO (ALPHA_R_SREL16, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
0, /* special_function */
|
||
"SREL16", /* name */
|
||
true, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* 32 bit PC relative offset. */
|
||
HOWTO (ALPHA_R_SREL32, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
0, /* special_function */
|
||
"SREL32", /* name */
|
||
true, /* partial_inplace */
|
||
0xffffffff, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* A 64 bit PC relative offset. */
|
||
HOWTO (ALPHA_R_SREL64, /* type */
|
||
0, /* rightshift */
|
||
4, /* size (0 = byte, 1 = short, 2 = long) */
|
||
64, /* bitsize */
|
||
true, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
0, /* special_function */
|
||
"SREL64", /* name */
|
||
true, /* partial_inplace */
|
||
MINUS_ONE, /* src_mask */
|
||
MINUS_ONE, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Push a value on the reloc evaluation stack. */
|
||
HOWTO (ALPHA_R_OP_PUSH, /* type */
|
||
0, /* rightshift */
|
||
0, /* size (0 = byte, 1 = short, 2 = long) */
|
||
0, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
0, /* special_function */
|
||
"OP_PUSH", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Store the value from the stack at the given address. Store it in
|
||
a bitfield of size r_size starting at bit position r_offset. */
|
||
HOWTO (ALPHA_R_OP_STORE, /* type */
|
||
0, /* rightshift */
|
||
4, /* size (0 = byte, 1 = short, 2 = long) */
|
||
64, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
0, /* special_function */
|
||
"OP_STORE", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
MINUS_ONE, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Subtract the reloc address from the value on the top of the
|
||
relocation stack. */
|
||
HOWTO (ALPHA_R_OP_PSUB, /* type */
|
||
0, /* rightshift */
|
||
0, /* size (0 = byte, 1 = short, 2 = long) */
|
||
0, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
0, /* special_function */
|
||
"OP_PSUB", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Shift the value on the top of the relocation stack right by the
|
||
given value. */
|
||
HOWTO (ALPHA_R_OP_PRSHIFT, /* type */
|
||
0, /* rightshift */
|
||
0, /* size (0 = byte, 1 = short, 2 = long) */
|
||
0, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
0, /* special_function */
|
||
"OP_PRSHIFT", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false), /* pcrel_offset */
|
||
|
||
/* Adjust the GP value for a new range in the object file. */
|
||
HOWTO (ALPHA_R_GPVALUE, /* type */
|
||
0, /* rightshift */
|
||
0, /* size (0 = byte, 1 = short, 2 = long) */
|
||
0, /* bitsize */
|
||
false, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
0, /* special_function */
|
||
"GPVALUE", /* name */
|
||
false, /* partial_inplace */
|
||
0, /* src_mask */
|
||
0, /* dst_mask */
|
||
false) /* pcrel_offset */
|
||
};
|
||
|
||
/* Recognize an Alpha ECOFF file. */
|
||
|
||
static const bfd_target *
|
||
alpha_ecoff_object_p (abfd)
|
||
bfd *abfd;
|
||
{
|
||
static const bfd_target *ret;
|
||
|
||
ret = coff_object_p (abfd);
|
||
|
||
if (ret != NULL)
|
||
{
|
||
asection *sec;
|
||
|
||
/* Alpha ECOFF has a .pdata section. The lnnoptr field of the
|
||
.pdata section is the number of entries it contains. Each
|
||
entry takes up 8 bytes. The number of entries is required
|
||
since the section is aligned to a 16 byte boundary. When we
|
||
link .pdata sections together, we do not want to include the
|
||
alignment bytes. We handle this on input by faking the size
|
||
of the .pdata section to remove the unwanted alignment bytes.
|
||
On output we will set the lnnoptr field and force the
|
||
alignment. */
|
||
sec = bfd_get_section_by_name (abfd, _PDATA);
|
||
if (sec != (asection *) NULL)
|
||
{
|
||
bfd_size_type size;
|
||
|
||
size = sec->line_filepos * 8;
|
||
BFD_ASSERT (size == bfd_section_size (abfd, sec)
|
||
|| size + 8 == bfd_section_size (abfd, sec));
|
||
if (! bfd_set_section_size (abfd, sec, size))
|
||
return NULL;
|
||
}
|
||
}
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* See whether the magic number matches. */
|
||
|
||
static boolean
|
||
alpha_ecoff_bad_format_hook (abfd, filehdr)
|
||
bfd *abfd;
|
||
PTR filehdr;
|
||
{
|
||
struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
|
||
|
||
if (ALPHA_ECOFF_BADMAG (*internal_f))
|
||
return false;
|
||
|
||
return true;
|
||
}
|
||
|
||
/* This is a hook called by coff_real_object_p to create any backend
|
||
specific information. */
|
||
|
||
static PTR
|
||
alpha_ecoff_mkobject_hook (abfd, filehdr, aouthdr)
|
||
bfd *abfd;
|
||
PTR filehdr;
|
||
PTR aouthdr;
|
||
{
|
||
PTR ecoff;
|
||
|
||
ecoff = _bfd_ecoff_mkobject_hook (abfd, filehdr, aouthdr);
|
||
|
||
if (ecoff != NULL)
|
||
{
|
||
struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
|
||
|
||
/* Set additional BFD flags according to the object type from the
|
||
machine specific file header flags. */
|
||
switch (internal_f->f_flags & F_ALPHA_OBJECT_TYPE_MASK)
|
||
{
|
||
case F_ALPHA_SHARABLE:
|
||
abfd->flags |= DYNAMIC;
|
||
break;
|
||
case F_ALPHA_CALL_SHARED:
|
||
/* Always executable if using shared libraries as the run time
|
||
loader might resolve undefined references. */
|
||
abfd->flags |= (DYNAMIC | EXEC_P);
|
||
break;
|
||
}
|
||
}
|
||
return ecoff;
|
||
}
|
||
|
||
/* Reloc handling. */
|
||
|
||
/* Swap a reloc in. */
|
||
|
||
static void
|
||
alpha_ecoff_swap_reloc_in (abfd, ext_ptr, intern)
|
||
bfd *abfd;
|
||
PTR ext_ptr;
|
||
struct internal_reloc *intern;
|
||
{
|
||
const RELOC *ext = (RELOC *) ext_ptr;
|
||
|
||
intern->r_vaddr = bfd_h_get_64 (abfd, (bfd_byte *) ext->r_vaddr);
|
||
intern->r_symndx = bfd_h_get_32 (abfd, (bfd_byte *) ext->r_symndx);
|
||
|
||
BFD_ASSERT (abfd->xvec->header_byteorder_big_p == false);
|
||
|
||
intern->r_type = ((ext->r_bits[0] & RELOC_BITS0_TYPE_LITTLE)
|
||
>> RELOC_BITS0_TYPE_SH_LITTLE);
|
||
intern->r_extern = (ext->r_bits[1] & RELOC_BITS1_EXTERN_LITTLE) != 0;
|
||
intern->r_offset = ((ext->r_bits[1] & RELOC_BITS1_OFFSET_LITTLE)
|
||
>> RELOC_BITS1_OFFSET_SH_LITTLE);
|
||
/* Ignored the reserved bits. */
|
||
intern->r_size = ((ext->r_bits[3] & RELOC_BITS3_SIZE_LITTLE)
|
||
>> RELOC_BITS3_SIZE_SH_LITTLE);
|
||
|
||
if (intern->r_type == ALPHA_R_LITUSE
|
||
|| intern->r_type == ALPHA_R_GPDISP)
|
||
{
|
||
/* Handle the LITUSE and GPDISP relocs specially. Its symndx
|
||
value is not actually a symbol index, but is instead a
|
||
special code. We put the code in the r_size field, and
|
||
clobber the symndx. */
|
||
if (intern->r_size != 0)
|
||
abort ();
|
||
intern->r_size = intern->r_symndx;
|
||
intern->r_symndx = RELOC_SECTION_NONE;
|
||
}
|
||
else if (intern->r_type == ALPHA_R_IGNORE)
|
||
{
|
||
/* The IGNORE reloc generally follows a GPDISP reloc, and is
|
||
against the .lita section. The section is irrelevant. */
|
||
if (! intern->r_extern &&
|
||
(intern->r_symndx == RELOC_SECTION_NONE
|
||
|| intern->r_symndx == RELOC_SECTION_ABS))
|
||
abort ();
|
||
if (! intern->r_extern && intern->r_symndx == RELOC_SECTION_LITA)
|
||
intern->r_symndx = RELOC_SECTION_NONE;
|
||
}
|
||
}
|
||
|
||
/* Swap a reloc out. */
|
||
|
||
static void
|
||
alpha_ecoff_swap_reloc_out (abfd, intern, dst)
|
||
bfd *abfd;
|
||
const struct internal_reloc *intern;
|
||
PTR dst;
|
||
{
|
||
RELOC *ext = (RELOC *) dst;
|
||
long symndx;
|
||
unsigned char size;
|
||
|
||
/* Undo the hackery done in swap_reloc_in. */
|
||
if (intern->r_type == ALPHA_R_LITUSE
|
||
|| intern->r_type == ALPHA_R_GPDISP)
|
||
{
|
||
symndx = intern->r_size;
|
||
size = 0;
|
||
}
|
||
else if (intern->r_type == ALPHA_R_IGNORE
|
||
&& ! intern->r_extern
|
||
&& intern->r_symndx == RELOC_SECTION_NONE)
|
||
{
|
||
symndx = RELOC_SECTION_LITA;
|
||
size = intern->r_size;
|
||
}
|
||
else
|
||
{
|
||
symndx = intern->r_symndx;
|
||
size = intern->r_size;
|
||
}
|
||
|
||
BFD_ASSERT (intern->r_extern
|
||
|| (intern->r_symndx >= 0 && intern->r_symndx <= 14));
|
||
|
||
bfd_h_put_64 (abfd, intern->r_vaddr, (bfd_byte *) ext->r_vaddr);
|
||
bfd_h_put_32 (abfd, symndx, (bfd_byte *) ext->r_symndx);
|
||
|
||
BFD_ASSERT (abfd->xvec->header_byteorder_big_p == false);
|
||
|
||
ext->r_bits[0] = ((intern->r_type << RELOC_BITS0_TYPE_SH_LITTLE)
|
||
& RELOC_BITS0_TYPE_LITTLE);
|
||
ext->r_bits[1] = ((intern->r_extern ? RELOC_BITS1_EXTERN_LITTLE : 0)
|
||
| ((intern->r_offset << RELOC_BITS1_OFFSET_SH_LITTLE)
|
||
& RELOC_BITS1_OFFSET_LITTLE));
|
||
ext->r_bits[2] = 0;
|
||
ext->r_bits[3] = ((size << RELOC_BITS3_SIZE_SH_LITTLE)
|
||
& RELOC_BITS3_SIZE_LITTLE);
|
||
}
|
||
|
||
/* Finish canonicalizing a reloc. Part of this is generic to all
|
||
ECOFF targets, and that part is in ecoff.c. The rest is done in
|
||
this backend routine. It must fill in the howto field. */
|
||
|
||
static void
|
||
alpha_adjust_reloc_in (abfd, intern, rptr)
|
||
bfd *abfd;
|
||
const struct internal_reloc *intern;
|
||
arelent *rptr;
|
||
{
|
||
if (intern->r_type > ALPHA_R_GPVALUE)
|
||
abort ();
|
||
|
||
switch (intern->r_type)
|
||
{
|
||
case ALPHA_R_BRADDR:
|
||
case ALPHA_R_SREL16:
|
||
case ALPHA_R_SREL32:
|
||
case ALPHA_R_SREL64:
|
||
/* The PC relative relocs do not seem to use the section VMA as
|
||
a negative addend. */
|
||
rptr->addend = 0;
|
||
break;
|
||
|
||
case ALPHA_R_GPREL32:
|
||
case ALPHA_R_LITERAL:
|
||
/* Copy the gp value for this object file into the addend, to
|
||
ensure that we are not confused by the linker. */
|
||
if (! intern->r_extern)
|
||
rptr->addend += ecoff_data (abfd)->gp;
|
||
break;
|
||
|
||
case ALPHA_R_LITUSE:
|
||
case ALPHA_R_GPDISP:
|
||
/* The LITUSE and GPDISP relocs do not use a symbol, or an
|
||
addend, but they do use a special code. Put this code in the
|
||
addend field. */
|
||
rptr->addend = intern->r_size;
|
||
break;
|
||
|
||
case ALPHA_R_OP_STORE:
|
||
/* The STORE reloc needs the size and offset fields. We store
|
||
them in the addend. */
|
||
BFD_ASSERT (intern->r_offset <= 256 && intern->r_size <= 256);
|
||
rptr->addend = (intern->r_offset << 8) + intern->r_size;
|
||
break;
|
||
|
||
case ALPHA_R_OP_PUSH:
|
||
case ALPHA_R_OP_PSUB:
|
||
case ALPHA_R_OP_PRSHIFT:
|
||
/* The PUSH, PSUB and PRSHIFT relocs do not actually use an
|
||
address. I believe that the address supplied is really an
|
||
addend. */
|
||
rptr->addend = intern->r_vaddr;
|
||
break;
|
||
|
||
case ALPHA_R_GPVALUE:
|
||
/* Set the addend field to the new GP value. */
|
||
rptr->addend = intern->r_symndx + ecoff_data (abfd)->gp;
|
||
break;
|
||
|
||
case ALPHA_R_IGNORE:
|
||
/* If the type is ALPHA_R_IGNORE, make sure this is a reference
|
||
to the absolute section so that the reloc is ignored. For
|
||
some reason the address of this reloc type is not adjusted by
|
||
the section vma. We record the gp value for this object file
|
||
here, for convenience when doing the GPDISP relocation. */
|
||
rptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
|
||
rptr->address = intern->r_vaddr;
|
||
rptr->addend = ecoff_data (abfd)->gp;
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
rptr->howto = &alpha_howto_table[intern->r_type];
|
||
}
|
||
|
||
/* When writing out a reloc we need to pull some values back out of
|
||
the addend field into the reloc. This is roughly the reverse of
|
||
alpha_adjust_reloc_in, except that there are several changes we do
|
||
not need to undo. */
|
||
|
||
static void
|
||
alpha_adjust_reloc_out (abfd, rel, intern)
|
||
bfd *abfd;
|
||
const arelent *rel;
|
||
struct internal_reloc *intern;
|
||
{
|
||
switch (intern->r_type)
|
||
{
|
||
case ALPHA_R_LITUSE:
|
||
case ALPHA_R_GPDISP:
|
||
intern->r_size = rel->addend;
|
||
break;
|
||
|
||
case ALPHA_R_OP_STORE:
|
||
intern->r_size = rel->addend & 0xff;
|
||
intern->r_offset = (rel->addend >> 8) & 0xff;
|
||
break;
|
||
|
||
case ALPHA_R_OP_PUSH:
|
||
case ALPHA_R_OP_PSUB:
|
||
case ALPHA_R_OP_PRSHIFT:
|
||
intern->r_vaddr = rel->addend;
|
||
break;
|
||
|
||
case ALPHA_R_IGNORE:
|
||
intern->r_vaddr = rel->address;
|
||
if (intern->r_symndx == RELOC_SECTION_ABS)
|
||
intern->r_symndx = RELOC_SECTION_NONE;
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* The size of the stack for the relocation evaluator. */
|
||
#define RELOC_STACKSIZE (10)
|
||
|
||
/* Alpha ECOFF relocs have a built in expression evaluator as well as
|
||
other interdependencies. Rather than use a bunch of special
|
||
functions and global variables, we use a single routine to do all
|
||
the relocation for a section. I haven't yet worked out how the
|
||
assembler is going to handle this. */
|
||
|
||
static bfd_byte *
|
||
alpha_ecoff_get_relocated_section_contents (abfd, link_info, link_order,
|
||
data, relocateable, symbols)
|
||
bfd *abfd;
|
||
struct bfd_link_info *link_info;
|
||
struct bfd_link_order *link_order;
|
||
bfd_byte *data;
|
||
boolean relocateable;
|
||
asymbol **symbols;
|
||
{
|
||
bfd *input_bfd = link_order->u.indirect.section->owner;
|
||
asection *input_section = link_order->u.indirect.section;
|
||
long reloc_size = bfd_get_reloc_upper_bound (input_bfd, input_section);
|
||
arelent **reloc_vector = NULL;
|
||
long reloc_count;
|
||
bfd *output_bfd = relocateable ? abfd : (bfd *) NULL;
|
||
bfd_vma gp;
|
||
boolean gp_undefined;
|
||
bfd_vma stack[RELOC_STACKSIZE];
|
||
int tos = 0;
|
||
|
||
if (reloc_size < 0)
|
||
goto error_return;
|
||
reloc_vector = (arelent **) malloc (reloc_size);
|
||
if (reloc_vector == NULL && reloc_size != 0)
|
||
{
|
||
bfd_set_error (bfd_error_no_memory);
|
||
goto error_return;
|
||
}
|
||
|
||
if (! bfd_get_section_contents (input_bfd, input_section, data,
|
||
(file_ptr) 0, input_section->_raw_size))
|
||
goto error_return;
|
||
|
||
/* The section size is not going to change. */
|
||
input_section->_cooked_size = input_section->_raw_size;
|
||
input_section->reloc_done = true;
|
||
|
||
reloc_count = bfd_canonicalize_reloc (input_bfd, input_section,
|
||
reloc_vector, symbols);
|
||
if (reloc_count < 0)
|
||
goto error_return;
|
||
if (reloc_count == 0)
|
||
goto successful_return;
|
||
|
||
/* Get the GP value for the output BFD. */
|
||
gp_undefined = false;
|
||
if (ecoff_data (abfd)->gp == 0)
|
||
{
|
||
if (relocateable != false)
|
||
{
|
||
asection *sec;
|
||
bfd_vma lo;
|
||
|
||
/* Make up a value. */
|
||
lo = (bfd_vma) -1;
|
||
for (sec = abfd->sections; sec != NULL; sec = sec->next)
|
||
{
|
||
if (sec->vma < lo
|
||
&& (strcmp (sec->name, ".sbss") == 0
|
||
|| strcmp (sec->name, ".sdata") == 0
|
||
|| strcmp (sec->name, ".lit4") == 0
|
||
|| strcmp (sec->name, ".lit8") == 0
|
||
|| strcmp (sec->name, ".lita") == 0))
|
||
lo = sec->vma;
|
||
}
|
||
ecoff_data (abfd)->gp = lo + 0x8000;
|
||
}
|
||
else
|
||
{
|
||
struct bfd_link_hash_entry *h;
|
||
|
||
h = bfd_link_hash_lookup (link_info->hash, "_gp", false, false,
|
||
true);
|
||
if (h == (struct bfd_link_hash_entry *) NULL
|
||
|| h->type != bfd_link_hash_defined)
|
||
gp_undefined = true;
|
||
else
|
||
ecoff_data (abfd)->gp = (h->u.def.value
|
||
+ h->u.def.section->output_section->vma
|
||
+ h->u.def.section->output_offset);
|
||
}
|
||
}
|
||
gp = ecoff_data (abfd)->gp;
|
||
|
||
for (; *reloc_vector != (arelent *) NULL; reloc_vector++)
|
||
{
|
||
arelent *rel;
|
||
bfd_reloc_status_type r;
|
||
char *err;
|
||
|
||
rel = *reloc_vector;
|
||
r = bfd_reloc_ok;
|
||
switch (rel->howto->type)
|
||
{
|
||
case ALPHA_R_IGNORE:
|
||
rel->address += input_section->output_offset;
|
||
break;
|
||
|
||
case ALPHA_R_REFLONG:
|
||
case ALPHA_R_REFQUAD:
|
||
case ALPHA_R_BRADDR:
|
||
case ALPHA_R_HINT:
|
||
case ALPHA_R_SREL16:
|
||
case ALPHA_R_SREL32:
|
||
case ALPHA_R_SREL64:
|
||
if (relocateable
|
||
&& ((*rel->sym_ptr_ptr)->flags & BSF_SECTION_SYM) == 0)
|
||
{
|
||
rel->address += input_section->output_offset;
|
||
break;
|
||
}
|
||
r = bfd_perform_relocation (input_bfd, rel, data, input_section,
|
||
output_bfd, &err);
|
||
break;
|
||
|
||
case ALPHA_R_GPREL32:
|
||
/* This relocation is used in a switch table. It is a 32
|
||
bit offset from the current GP value. We must adjust it
|
||
by the different between the original GP value and the
|
||
current GP value. The original GP value is stored in the
|
||
addend. We adjust the addend and let
|
||
bfd_perform_relocation finish the job. */
|
||
rel->addend -= gp;
|
||
r = bfd_perform_relocation (input_bfd, rel, data, input_section,
|
||
output_bfd, &err);
|
||
if (r == bfd_reloc_ok && gp_undefined)
|
||
{
|
||
r = bfd_reloc_dangerous;
|
||
err = (char *) "GP relative relocation used when GP not defined";
|
||
}
|
||
break;
|
||
|
||
case ALPHA_R_LITERAL:
|
||
/* This is a reference to a literal value, generally
|
||
(always?) in the .lita section. This is a 16 bit GP
|
||
relative relocation. Sometimes the subsequent reloc is a
|
||
LITUSE reloc, which indicates how this reloc is used.
|
||
This sometimes permits rewriting the two instructions
|
||
referred to by the LITERAL and the LITUSE into different
|
||
instructions which do not refer to .lita. This can save
|
||
a memory reference, and permits removing a value from
|
||
.lita thus saving GP relative space.
|
||
|
||
We do not these optimizations. To do them we would need
|
||
to arrange to link the .lita section first, so that by
|
||
the time we got here we would know the final values to
|
||
use. This would not be particularly difficult, but it is
|
||
not currently implemented. */
|
||
|
||
{
|
||
unsigned long insn;
|
||
|
||
/* I believe that the LITERAL reloc will only apply to a
|
||
ldq or ldl instruction, so check my assumption. */
|
||
insn = bfd_get_32 (input_bfd, data + rel->address);
|
||
BFD_ASSERT (((insn >> 26) & 0x3f) == 0x29
|
||
|| ((insn >> 26) & 0x3f) == 0x28);
|
||
|
||
rel->addend -= gp;
|
||
r = bfd_perform_relocation (input_bfd, rel, data, input_section,
|
||
output_bfd, &err);
|
||
if (r == bfd_reloc_ok && gp_undefined)
|
||
{
|
||
r = bfd_reloc_dangerous;
|
||
err =
|
||
(char *) "GP relative relocation used when GP not defined";
|
||
}
|
||
}
|
||
break;
|
||
|
||
case ALPHA_R_LITUSE:
|
||
/* See ALPHA_R_LITERAL above for the uses of this reloc. It
|
||
does not cause anything to happen, itself. */
|
||
rel->address += input_section->output_offset;
|
||
break;
|
||
|
||
case ALPHA_R_GPDISP:
|
||
/* This marks the ldah of an ldah/lda pair which loads the
|
||
gp register with the difference of the gp value and the
|
||
current location. The second of the pair is r_size bytes
|
||
ahead, and is marked with an ALPHA_R_IGNORE reloc. */
|
||
{
|
||
unsigned long insn1, insn2;
|
||
bfd_vma addend;
|
||
|
||
BFD_ASSERT (reloc_vector[1] != NULL
|
||
&& reloc_vector[1]->howto->type == ALPHA_R_IGNORE
|
||
&& (rel->address + rel->addend
|
||
== reloc_vector[1]->address));
|
||
|
||
/* Get the two instructions. */
|
||
insn1 = bfd_get_32 (input_bfd, data + rel->address);
|
||
insn2 = bfd_get_32 (input_bfd, data + rel->address + rel->addend);
|
||
|
||
BFD_ASSERT (((insn1 >> 26) & 0x3f) == 0x09); /* ldah */
|
||
BFD_ASSERT (((insn2 >> 26) & 0x3f) == 0x08); /* lda */
|
||
|
||
/* Get the existing addend. We must account for the sign
|
||
extension done by lda and ldah. */
|
||
addend = ((insn1 & 0xffff) << 16) + (insn2 & 0xffff);
|
||
if (insn1 & 0x8000)
|
||
{
|
||
addend -= 0x80000000;
|
||
addend -= 0x80000000;
|
||
}
|
||
if (insn2 & 0x8000)
|
||
addend -= 0x10000;
|
||
|
||
/* The existing addend includes the different between the
|
||
gp of the input BFD and the address in the input BFD.
|
||
Subtract this out. */
|
||
addend -= (reloc_vector[1]->addend
|
||
- (input_section->vma + rel->address));
|
||
|
||
/* Now add in the final gp value, and subtract out the
|
||
final address. */
|
||
addend += (gp
|
||
- (input_section->output_section->vma
|
||
+ input_section->output_offset
|
||
+ rel->address));
|
||
|
||
/* Change the instructions, accounting for the sign
|
||
extension, and write them out. */
|
||
if (addend & 0x8000)
|
||
addend += 0x10000;
|
||
insn1 = (insn1 & 0xffff0000) | ((addend >> 16) & 0xffff);
|
||
insn2 = (insn2 & 0xffff0000) | (addend & 0xffff);
|
||
|
||
bfd_put_32 (input_bfd, (bfd_vma) insn1, data + rel->address);
|
||
bfd_put_32 (input_bfd, (bfd_vma) insn2,
|
||
data + rel->address + rel->addend);
|
||
|
||
rel->address += input_section->output_offset;
|
||
}
|
||
break;
|
||
|
||
case ALPHA_R_OP_PUSH:
|
||
/* Push a value on the reloc evaluation stack. */
|
||
{
|
||
asymbol *symbol;
|
||
bfd_vma relocation;
|
||
|
||
if (relocateable)
|
||
{
|
||
rel->address += input_section->output_offset;
|
||
break;
|
||
}
|
||
|
||
/* Figure out the relocation of this symbol. */
|
||
symbol = *rel->sym_ptr_ptr;
|
||
|
||
if (bfd_is_und_section (symbol->section))
|
||
r = bfd_reloc_undefined;
|
||
|
||
if (bfd_is_com_section (symbol->section))
|
||
relocation = 0;
|
||
else
|
||
relocation = symbol->value;
|
||
relocation += symbol->section->output_section->vma;
|
||
relocation += symbol->section->output_offset;
|
||
relocation += rel->addend;
|
||
|
||
if (tos >= RELOC_STACKSIZE)
|
||
abort ();
|
||
|
||
stack[tos++] = relocation;
|
||
}
|
||
break;
|
||
|
||
case ALPHA_R_OP_STORE:
|
||
/* Store a value from the reloc stack into a bitfield. */
|
||
{
|
||
bfd_vma val;
|
||
int offset, size;
|
||
|
||
if (relocateable)
|
||
{
|
||
rel->address += input_section->output_offset;
|
||
break;
|
||
}
|
||
|
||
if (tos == 0)
|
||
abort ();
|
||
|
||
/* The offset and size for this reloc are encoded into the
|
||
addend field by alpha_adjust_reloc_in. */
|
||
offset = (rel->addend >> 8) & 0xff;
|
||
size = rel->addend & 0xff;
|
||
|
||
val = bfd_get_64 (abfd, data + rel->address);
|
||
val &=~ (((1 << size) - 1) << offset);
|
||
val |= (stack[--tos] & ((1 << size) - 1)) << offset;
|
||
bfd_put_64 (abfd, val, data + rel->address);
|
||
}
|
||
break;
|
||
|
||
case ALPHA_R_OP_PSUB:
|
||
/* Subtract a value from the top of the stack. */
|
||
{
|
||
asymbol *symbol;
|
||
bfd_vma relocation;
|
||
|
||
if (relocateable)
|
||
{
|
||
rel->address += input_section->output_offset;
|
||
break;
|
||
}
|
||
|
||
/* Figure out the relocation of this symbol. */
|
||
symbol = *rel->sym_ptr_ptr;
|
||
|
||
if (bfd_is_und_section (symbol->section))
|
||
r = bfd_reloc_undefined;
|
||
|
||
if (bfd_is_com_section (symbol->section))
|
||
relocation = 0;
|
||
else
|
||
relocation = symbol->value;
|
||
relocation += symbol->section->output_section->vma;
|
||
relocation += symbol->section->output_offset;
|
||
relocation += rel->addend;
|
||
|
||
if (tos == 0)
|
||
abort ();
|
||
|
||
stack[tos - 1] -= relocation;
|
||
}
|
||
break;
|
||
|
||
case ALPHA_R_OP_PRSHIFT:
|
||
/* Shift the value on the top of the stack. */
|
||
{
|
||
asymbol *symbol;
|
||
bfd_vma relocation;
|
||
|
||
if (relocateable)
|
||
{
|
||
rel->address += input_section->output_offset;
|
||
break;
|
||
}
|
||
|
||
/* Figure out the relocation of this symbol. */
|
||
symbol = *rel->sym_ptr_ptr;
|
||
|
||
if (bfd_is_und_section (symbol->section))
|
||
r = bfd_reloc_undefined;
|
||
|
||
if (bfd_is_com_section (symbol->section))
|
||
relocation = 0;
|
||
else
|
||
relocation = symbol->value;
|
||
relocation += symbol->section->output_section->vma;
|
||
relocation += symbol->section->output_offset;
|
||
relocation += rel->addend;
|
||
|
||
if (tos == 0)
|
||
abort ();
|
||
|
||
stack[tos - 1] >>= relocation;
|
||
}
|
||
break;
|
||
|
||
case ALPHA_R_GPVALUE:
|
||
/* I really don't know if this does the right thing. */
|
||
gp = rel->addend;
|
||
gp_undefined = false;
|
||
break;
|
||
|
||
default:
|
||
abort ();
|
||
}
|
||
|
||
if (relocateable)
|
||
{
|
||
asection *os = input_section->output_section;
|
||
|
||
/* A partial link, so keep the relocs. */
|
||
os->orelocation[os->reloc_count] = rel;
|
||
os->reloc_count++;
|
||
}
|
||
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
switch (r)
|
||
{
|
||
case bfd_reloc_undefined:
|
||
if (! ((*link_info->callbacks->undefined_symbol)
|
||
(link_info, bfd_asymbol_name (*rel->sym_ptr_ptr),
|
||
input_bfd, input_section, rel->address)))
|
||
goto error_return;
|
||
break;
|
||
case bfd_reloc_dangerous:
|
||
if (! ((*link_info->callbacks->reloc_dangerous)
|
||
(link_info, err, input_bfd, input_section,
|
||
rel->address)))
|
||
goto error_return;
|
||
break;
|
||
case bfd_reloc_overflow:
|
||
if (! ((*link_info->callbacks->reloc_overflow)
|
||
(link_info, bfd_asymbol_name (*rel->sym_ptr_ptr),
|
||
rel->howto->name, rel->addend, input_bfd,
|
||
input_section, rel->address)))
|
||
goto error_return;
|
||
break;
|
||
case bfd_reloc_outofrange:
|
||
default:
|
||
abort ();
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (tos != 0)
|
||
abort ();
|
||
|
||
successful_return:
|
||
if (reloc_vector != NULL)
|
||
free (reloc_vector);
|
||
return data;
|
||
|
||
error_return:
|
||
if (reloc_vector != NULL)
|
||
free (reloc_vector);
|
||
return NULL;
|
||
}
|
||
|
||
/* Get the howto structure for a generic reloc type. */
|
||
|
||
static CONST struct reloc_howto_struct *
|
||
alpha_bfd_reloc_type_lookup (abfd, code)
|
||
bfd *abfd;
|
||
bfd_reloc_code_real_type code;
|
||
{
|
||
int alpha_type;
|
||
|
||
switch (code)
|
||
{
|
||
case BFD_RELOC_32:
|
||
alpha_type = ALPHA_R_REFLONG;
|
||
break;
|
||
case BFD_RELOC_64:
|
||
case BFD_RELOC_CTOR:
|
||
alpha_type = ALPHA_R_REFQUAD;
|
||
break;
|
||
case BFD_RELOC_GPREL32:
|
||
alpha_type = ALPHA_R_GPREL32;
|
||
break;
|
||
case BFD_RELOC_ALPHA_LITERAL:
|
||
alpha_type = ALPHA_R_LITERAL;
|
||
break;
|
||
case BFD_RELOC_ALPHA_LITUSE:
|
||
alpha_type = ALPHA_R_LITUSE;
|
||
break;
|
||
case BFD_RELOC_ALPHA_GPDISP_HI16:
|
||
alpha_type = ALPHA_R_GPDISP;
|
||
break;
|
||
case BFD_RELOC_ALPHA_GPDISP_LO16:
|
||
alpha_type = ALPHA_R_IGNORE;
|
||
break;
|
||
case BFD_RELOC_23_PCREL_S2:
|
||
alpha_type = ALPHA_R_BRADDR;
|
||
break;
|
||
case BFD_RELOC_ALPHA_HINT:
|
||
alpha_type = ALPHA_R_HINT;
|
||
break;
|
||
case BFD_RELOC_16_PCREL:
|
||
alpha_type = ALPHA_R_SREL16;
|
||
break;
|
||
case BFD_RELOC_32_PCREL:
|
||
alpha_type = ALPHA_R_SREL32;
|
||
break;
|
||
case BFD_RELOC_64_PCREL:
|
||
alpha_type = ALPHA_R_SREL64;
|
||
break;
|
||
#if 0
|
||
case ???:
|
||
alpha_type = ALPHA_R_OP_PUSH;
|
||
break;
|
||
case ???:
|
||
alpha_type = ALPHA_R_OP_STORE;
|
||
break;
|
||
case ???:
|
||
alpha_type = ALPHA_R_OP_PSUB;
|
||
break;
|
||
case ???:
|
||
alpha_type = ALPHA_R_OP_PRSHIFT;
|
||
break;
|
||
case ???:
|
||
alpha_type = ALPHA_R_GPVALUE;
|
||
break;
|
||
#endif
|
||
default:
|
||
return (CONST struct reloc_howto_struct *) NULL;
|
||
}
|
||
|
||
return &alpha_howto_table[alpha_type];
|
||
}
|
||
|
||
/* A helper routine for alpha_relocate_section which converts an
|
||
external reloc when generating relocateable output. Returns the
|
||
relocation amount. */
|
||
|
||
static bfd_vma
|
||
alpha_convert_external_reloc (output_bfd, info, input_bfd, ext_rel, h)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
bfd *input_bfd;
|
||
struct external_reloc *ext_rel;
|
||
struct ecoff_link_hash_entry *h;
|
||
{
|
||
unsigned long r_symndx;
|
||
bfd_vma relocation;
|
||
|
||
BFD_ASSERT (info->relocateable);
|
||
|
||
if (h->root.type == bfd_link_hash_defined)
|
||
{
|
||
asection *hsec;
|
||
const char *name;
|
||
|
||
/* This symbol is defined in the output. Convert the reloc from
|
||
being against the symbol to being against the section. */
|
||
|
||
/* Clear the r_extern bit. */
|
||
ext_rel->r_bits[1] &=~ RELOC_BITS1_EXTERN_LITTLE;
|
||
|
||
/* Compute a new r_symndx value. */
|
||
hsec = h->root.u.def.section;
|
||
name = bfd_get_section_name (output_bfd, hsec->output_section);
|
||
|
||
r_symndx = -1;
|
||
switch (name[1])
|
||
{
|
||
case 'A':
|
||
if (strcmp (name, "*ABS*") == 0)
|
||
r_symndx = RELOC_SECTION_ABS;
|
||
break;
|
||
case 'b':
|
||
if (strcmp (name, ".bss") == 0)
|
||
r_symndx = RELOC_SECTION_BSS;
|
||
break;
|
||
case 'd':
|
||
if (strcmp (name, ".data") == 0)
|
||
r_symndx = RELOC_SECTION_DATA;
|
||
break;
|
||
case 'f':
|
||
if (strcmp (name, ".fini") == 0)
|
||
r_symndx = RELOC_SECTION_FINI;
|
||
break;
|
||
case 'i':
|
||
if (strcmp (name, ".init") == 0)
|
||
r_symndx = RELOC_SECTION_INIT;
|
||
break;
|
||
case 'l':
|
||
if (strcmp (name, ".lita") == 0)
|
||
r_symndx = RELOC_SECTION_LITA;
|
||
else if (strcmp (name, ".lit8") == 0)
|
||
r_symndx = RELOC_SECTION_LIT8;
|
||
else if (strcmp (name, ".lit4") == 0)
|
||
r_symndx = RELOC_SECTION_LIT4;
|
||
break;
|
||
case 'p':
|
||
if (strcmp (name, ".pdata") == 0)
|
||
r_symndx = RELOC_SECTION_PDATA;
|
||
break;
|
||
case 'r':
|
||
if (strcmp (name, ".rdata") == 0)
|
||
r_symndx = RELOC_SECTION_RDATA;
|
||
break;
|
||
case 's':
|
||
if (strcmp (name, ".sdata") == 0)
|
||
r_symndx = RELOC_SECTION_SDATA;
|
||
else if (strcmp (name, ".sbss") == 0)
|
||
r_symndx = RELOC_SECTION_SBSS;
|
||
break;
|
||
case 't':
|
||
if (strcmp (name, ".text") == 0)
|
||
r_symndx = RELOC_SECTION_TEXT;
|
||
break;
|
||
case 'x':
|
||
if (strcmp (name, ".xdata") == 0)
|
||
r_symndx = RELOC_SECTION_XDATA;
|
||
break;
|
||
}
|
||
|
||
if (r_symndx == -1)
|
||
abort ();
|
||
|
||
/* Add the section VMA and the symbol value. */
|
||
relocation = (h->root.u.def.value
|
||
+ hsec->output_section->vma
|
||
+ hsec->output_offset);
|
||
}
|
||
else
|
||
{
|
||
/* Change the symndx value to the right one for
|
||
the output BFD. */
|
||
r_symndx = h->indx;
|
||
if (r_symndx == -1)
|
||
{
|
||
/* Caller must give an error. */
|
||
r_symndx = 0;
|
||
}
|
||
relocation = 0;
|
||
}
|
||
|
||
/* Write out the new r_symndx value. */
|
||
bfd_h_put_32 (input_bfd, (bfd_vma) r_symndx,
|
||
(bfd_byte *) ext_rel->r_symndx);
|
||
|
||
return relocation;
|
||
}
|
||
|
||
/* Relocate a section while linking an Alpha ECOFF file. This is
|
||
quite similar to get_relocated_section_contents. Perhaps they
|
||
could be combined somehow. */
|
||
|
||
static boolean
|
||
alpha_relocate_section (output_bfd, info, input_bfd, input_section,
|
||
contents, external_relocs)
|
||
bfd *output_bfd;
|
||
struct bfd_link_info *info;
|
||
bfd *input_bfd;
|
||
asection *input_section;
|
||
bfd_byte *contents;
|
||
PTR external_relocs;
|
||
{
|
||
asection **symndx_to_section;
|
||
struct ecoff_link_hash_entry **sym_hashes;
|
||
bfd_vma gp;
|
||
boolean gp_undefined;
|
||
bfd_vma stack[RELOC_STACKSIZE];
|
||
int tos = 0;
|
||
struct external_reloc *ext_rel;
|
||
struct external_reloc *ext_rel_end;
|
||
|
||
/* We keep a table mapping the symndx found in an internal reloc to
|
||
the appropriate section. This is faster than looking up the
|
||
section by name each time. */
|
||
symndx_to_section = ecoff_data (input_bfd)->symndx_to_section;
|
||
if (symndx_to_section == (asection **) NULL)
|
||
{
|
||
symndx_to_section = ((asection **)
|
||
bfd_alloc (input_bfd,
|
||
(NUM_RELOC_SECTIONS
|
||
* sizeof (asection *))));
|
||
if (!symndx_to_section)
|
||
{
|
||
bfd_set_error (bfd_error_no_memory);
|
||
return false;
|
||
}
|
||
|
||
symndx_to_section[RELOC_SECTION_NONE] = NULL;
|
||
symndx_to_section[RELOC_SECTION_TEXT] =
|
||
bfd_get_section_by_name (input_bfd, ".text");
|
||
symndx_to_section[RELOC_SECTION_RDATA] =
|
||
bfd_get_section_by_name (input_bfd, ".rdata");
|
||
symndx_to_section[RELOC_SECTION_DATA] =
|
||
bfd_get_section_by_name (input_bfd, ".data");
|
||
symndx_to_section[RELOC_SECTION_SDATA] =
|
||
bfd_get_section_by_name (input_bfd, ".sdata");
|
||
symndx_to_section[RELOC_SECTION_SBSS] =
|
||
bfd_get_section_by_name (input_bfd, ".sbss");
|
||
symndx_to_section[RELOC_SECTION_BSS] =
|
||
bfd_get_section_by_name (input_bfd, ".bss");
|
||
symndx_to_section[RELOC_SECTION_INIT] =
|
||
bfd_get_section_by_name (input_bfd, ".init");
|
||
symndx_to_section[RELOC_SECTION_LIT8] =
|
||
bfd_get_section_by_name (input_bfd, ".lit8");
|
||
symndx_to_section[RELOC_SECTION_LIT4] =
|
||
bfd_get_section_by_name (input_bfd, ".lit4");
|
||
symndx_to_section[RELOC_SECTION_XDATA] =
|
||
bfd_get_section_by_name (input_bfd, ".xdata");
|
||
symndx_to_section[RELOC_SECTION_PDATA] =
|
||
bfd_get_section_by_name (input_bfd, ".pdata");
|
||
symndx_to_section[RELOC_SECTION_FINI] =
|
||
bfd_get_section_by_name (input_bfd, ".fini");
|
||
symndx_to_section[RELOC_SECTION_LITA] =
|
||
bfd_get_section_by_name (input_bfd, ".lita");
|
||
symndx_to_section[RELOC_SECTION_ABS] = bfd_abs_section_ptr;
|
||
|
||
ecoff_data (input_bfd)->symndx_to_section = symndx_to_section;
|
||
}
|
||
|
||
sym_hashes = ecoff_data (input_bfd)->sym_hashes;
|
||
|
||
gp = ecoff_data (output_bfd)->gp;
|
||
if (gp == 0)
|
||
gp_undefined = true;
|
||
else
|
||
gp_undefined = false;
|
||
|
||
BFD_ASSERT (output_bfd->xvec->header_byteorder_big_p == false);
|
||
BFD_ASSERT (input_bfd->xvec->header_byteorder_big_p == false);
|
||
|
||
ext_rel = (struct external_reloc *) external_relocs;
|
||
ext_rel_end = ext_rel + input_section->reloc_count;
|
||
for (; ext_rel < ext_rel_end; ext_rel++)
|
||
{
|
||
bfd_vma r_vaddr;
|
||
unsigned long r_symndx;
|
||
int r_type;
|
||
int r_extern;
|
||
int r_offset;
|
||
int r_size;
|
||
boolean relocatep;
|
||
boolean adjust_addrp;
|
||
boolean gp_usedp;
|
||
bfd_vma addend;
|
||
|
||
r_vaddr = bfd_h_get_64 (input_bfd, (bfd_byte *) ext_rel->r_vaddr);
|
||
r_symndx = bfd_h_get_32 (input_bfd, (bfd_byte *) ext_rel->r_symndx);
|
||
|
||
r_type = ((ext_rel->r_bits[0] & RELOC_BITS0_TYPE_LITTLE)
|
||
>> RELOC_BITS0_TYPE_SH_LITTLE);
|
||
r_extern = (ext_rel->r_bits[1] & RELOC_BITS1_EXTERN_LITTLE) != 0;
|
||
r_offset = ((ext_rel->r_bits[1] & RELOC_BITS1_OFFSET_LITTLE)
|
||
>> RELOC_BITS1_OFFSET_SH_LITTLE);
|
||
/* Ignored the reserved bits. */
|
||
r_size = ((ext_rel->r_bits[3] & RELOC_BITS3_SIZE_LITTLE)
|
||
>> RELOC_BITS3_SIZE_SH_LITTLE);
|
||
|
||
relocatep = false;
|
||
adjust_addrp = true;
|
||
gp_usedp = false;
|
||
addend = 0;
|
||
|
||
switch (r_type)
|
||
{
|
||
default:
|
||
abort ();
|
||
|
||
case ALPHA_R_IGNORE:
|
||
/* This reloc appears after a GPDISP reloc. It marks the
|
||
position of the second instruction to be altered by the
|
||
GPDISP reloc, but is not otherwise used for anything.
|
||
For some reason, the address of the relocation does not
|
||
appear to include the section VMA, unlike the other
|
||
relocation types. */
|
||
if (info->relocateable)
|
||
bfd_h_put_64 (input_bfd,
|
||
input_section->output_offset + r_vaddr,
|
||
(bfd_byte *) ext_rel->r_vaddr);
|
||
adjust_addrp = false;
|
||
break;
|
||
|
||
case ALPHA_R_REFLONG:
|
||
case ALPHA_R_REFQUAD:
|
||
case ALPHA_R_BRADDR:
|
||
case ALPHA_R_HINT:
|
||
case ALPHA_R_SREL16:
|
||
case ALPHA_R_SREL32:
|
||
case ALPHA_R_SREL64:
|
||
relocatep = true;
|
||
break;
|
||
|
||
case ALPHA_R_GPREL32:
|
||
/* This relocation is used in a switch table. It is a 32
|
||
bit offset from the current GP value. We must adjust it
|
||
by the different between the original GP value and the
|
||
current GP value. */
|
||
relocatep = true;
|
||
addend = ecoff_data (input_bfd)->gp - gp;
|
||
gp_usedp = true;
|
||
break;
|
||
|
||
case ALPHA_R_LITERAL:
|
||
/* This is a reference to a literal value, generally
|
||
(always?) in the .lita section. This is a 16 bit GP
|
||
relative relocation. Sometimes the subsequent reloc is a
|
||
LITUSE reloc, which indicates how this reloc is used.
|
||
This sometimes permits rewriting the two instructions
|
||
referred to by the LITERAL and the LITUSE into different
|
||
instructions which do not refer to .lita. This can save
|
||
a memory reference, and permits removing a value from
|
||
.lita thus saving GP relative space.
|
||
|
||
We do not these optimizations. To do them we would need
|
||
to arrange to link the .lita section first, so that by
|
||
the time we got here we would know the final values to
|
||
use. This would not be particularly difficult, but it is
|
||
not currently implemented. */
|
||
|
||
/* I believe that the LITERAL reloc will only apply to a ldq
|
||
or ldl instruction, so check my assumption. */
|
||
{
|
||
unsigned long insn;
|
||
|
||
insn = bfd_get_32 (input_bfd,
|
||
contents + r_vaddr - input_section->vma);
|
||
BFD_ASSERT (((insn >> 26) & 0x3f) == 0x29
|
||
|| ((insn >> 26) & 0x3f) == 0x28);
|
||
}
|
||
|
||
relocatep = true;
|
||
addend = ecoff_data (input_bfd)->gp - gp;
|
||
gp_usedp = true;
|
||
break;
|
||
|
||
case ALPHA_R_LITUSE:
|
||
/* See ALPHA_R_LITERAL above for the uses of this reloc. It
|
||
does not cause anything to happen, itself. */
|
||
break;
|
||
|
||
case ALPHA_R_GPDISP:
|
||
/* This marks the ldah of an ldah/lda pair which loads the
|
||
gp register with the difference of the gp value and the
|
||
current location. The second of the pair is r_symndx
|
||
bytes ahead, and is also marked with an ALPHA_R_IGNORE
|
||
reloc. */
|
||
{
|
||
unsigned long insn1, insn2;
|
||
|
||
BFD_ASSERT (ext_rel + 1 < ext_rel_end
|
||
&& (((ext_rel + 1)->r_bits[0]
|
||
& RELOC_BITS0_TYPE_LITTLE)
|
||
>> RELOC_BITS0_TYPE_SH_LITTLE) == ALPHA_R_IGNORE
|
||
&& (bfd_h_get_64 (input_bfd,
|
||
(bfd_byte *) (ext_rel + 1)->r_vaddr)
|
||
== r_vaddr - input_section->vma + r_symndx));
|
||
|
||
/* Get the two instructions. */
|
||
insn1 = bfd_get_32 (input_bfd,
|
||
contents + r_vaddr - input_section->vma);
|
||
insn2 = bfd_get_32 (input_bfd,
|
||
(contents
|
||
+ r_vaddr
|
||
- input_section->vma
|
||
+ r_symndx));
|
||
|
||
BFD_ASSERT (((insn1 >> 26) & 0x3f) == 0x09); /* ldah */
|
||
BFD_ASSERT (((insn2 >> 26) & 0x3f) == 0x08); /* lda */
|
||
|
||
/* Get the existing addend. We must account for the sign
|
||
extension done by lda and ldah. */
|
||
addend = ((insn1 & 0xffff) << 16) + (insn2 & 0xffff);
|
||
if (insn1 & 0x8000)
|
||
{
|
||
/* This is addend -= 0x100000000 without causing an
|
||
integer overflow on a 32 bit host. */
|
||
addend -= 0x80000000;
|
||
addend -= 0x80000000;
|
||
}
|
||
if (insn2 & 0x8000)
|
||
addend -= 0x10000;
|
||
|
||
/* The existing addend includes the difference between the
|
||
gp of the input BFD and the address in the input BFD.
|
||
We want to change this to the difference between the
|
||
final GP and the final address. */
|
||
addend += (gp
|
||
- ecoff_data (input_bfd)->gp
|
||
+ input_section->vma
|
||
- (input_section->output_section->vma
|
||
+ input_section->output_offset));
|
||
|
||
/* Change the instructions, accounting for the sign
|
||
extension, and write them out. */
|
||
if (addend & 0x8000)
|
||
addend += 0x10000;
|
||
insn1 = (insn1 & 0xffff0000) | ((addend >> 16) & 0xffff);
|
||
insn2 = (insn2 & 0xffff0000) | (addend & 0xffff);
|
||
|
||
bfd_put_32 (input_bfd, (bfd_vma) insn1,
|
||
contents + r_vaddr - input_section->vma);
|
||
bfd_put_32 (input_bfd, (bfd_vma) insn2,
|
||
contents + r_vaddr - input_section->vma + r_symndx);
|
||
|
||
gp_usedp = true;
|
||
}
|
||
break;
|
||
|
||
case ALPHA_R_OP_PUSH:
|
||
case ALPHA_R_OP_PSUB:
|
||
case ALPHA_R_OP_PRSHIFT:
|
||
/* Manipulate values on the reloc evaluation stack. The
|
||
r_vaddr field is not an address in input_section, it is
|
||
the current value (including any addend) of the object
|
||
being used. */
|
||
if (! r_extern)
|
||
{
|
||
asection *s;
|
||
|
||
s = symndx_to_section[r_symndx];
|
||
if (s == (asection *) NULL)
|
||
abort ();
|
||
addend = s->output_section->vma + s->output_offset - s->vma;
|
||
}
|
||
else
|
||
{
|
||
struct ecoff_link_hash_entry *h;
|
||
|
||
h = sym_hashes[r_symndx];
|
||
if (h == (struct ecoff_link_hash_entry *) NULL)
|
||
abort ();
|
||
|
||
if (! info->relocateable)
|
||
{
|
||
if (h->root.type == bfd_link_hash_defined)
|
||
addend = (h->root.u.def.value
|
||
+ h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset);
|
||
else
|
||
{
|
||
/* Note that we pass the address as 0, since we
|
||
do not have a meaningful number for the
|
||
location within the section that is being
|
||
relocated. */
|
||
if (! ((*info->callbacks->undefined_symbol)
|
||
(info, h->root.root.string, input_bfd,
|
||
input_section, (bfd_vma) 0)))
|
||
return false;
|
||
addend = 0;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (h->root.type != bfd_link_hash_defined
|
||
&& h->indx == -1)
|
||
{
|
||
/* This symbol is not being written out. Pass
|
||
the address as 0, as with undefined_symbol,
|
||
above. */
|
||
if (! ((*info->callbacks->unattached_reloc)
|
||
(info, h->root.root.string, input_bfd,
|
||
input_section, (bfd_vma) 0)))
|
||
return false;
|
||
}
|
||
|
||
addend = alpha_convert_external_reloc (output_bfd, info,
|
||
input_bfd,
|
||
ext_rel, h);
|
||
}
|
||
}
|
||
|
||
addend += r_vaddr;
|
||
|
||
if (info->relocateable)
|
||
{
|
||
/* Adjust r_vaddr by the addend. */
|
||
bfd_h_put_64 (input_bfd, addend,
|
||
(bfd_byte *) ext_rel->r_vaddr);
|
||
}
|
||
else
|
||
{
|
||
switch (r_type)
|
||
{
|
||
case ALPHA_R_OP_PUSH:
|
||
if (tos >= RELOC_STACKSIZE)
|
||
abort ();
|
||
stack[tos++] = addend;
|
||
break;
|
||
|
||
case ALPHA_R_OP_PSUB:
|
||
if (tos == 0)
|
||
abort ();
|
||
stack[tos - 1] -= addend;
|
||
break;
|
||
|
||
case ALPHA_R_OP_PRSHIFT:
|
||
if (tos == 0)
|
||
abort ();
|
||
stack[tos - 1] >>= addend;
|
||
break;
|
||
}
|
||
}
|
||
|
||
adjust_addrp = false;
|
||
break;
|
||
|
||
case ALPHA_R_OP_STORE:
|
||
/* Store a value from the reloc stack into a bitfield. If
|
||
we are generating relocateable output, all we do is
|
||
adjust the address of the reloc. */
|
||
if (! info->relocateable)
|
||
{
|
||
bfd_vma mask;
|
||
bfd_vma val;
|
||
|
||
if (tos == 0)
|
||
abort ();
|
||
|
||
/* Get the relocation mask. The separate steps and the
|
||
casts to bfd_vma are attempts to avoid a bug in the
|
||
Alpha OSF 1.3 C compiler. See reloc.c for more
|
||
details. */
|
||
mask = 1;
|
||
mask <<= (bfd_vma) r_size;
|
||
mask -= 1;
|
||
|
||
/* FIXME: I don't know what kind of overflow checking,
|
||
if any, should be done here. */
|
||
val = bfd_get_64 (input_bfd,
|
||
contents + r_vaddr - input_section->vma);
|
||
val &=~ mask << (bfd_vma) r_offset;
|
||
val |= (stack[--tos] & mask) << (bfd_vma) r_offset;
|
||
bfd_put_64 (input_bfd, val,
|
||
contents + r_vaddr - input_section->vma);
|
||
}
|
||
break;
|
||
|
||
case ALPHA_R_GPVALUE:
|
||
/* I really don't know if this does the right thing. */
|
||
gp = ecoff_data (input_bfd)->gp + r_symndx;
|
||
gp_undefined = false;
|
||
break;
|
||
}
|
||
|
||
if (relocatep)
|
||
{
|
||
reloc_howto_type *howto;
|
||
struct ecoff_link_hash_entry *h = NULL;
|
||
asection *s = NULL;
|
||
bfd_vma relocation;
|
||
bfd_reloc_status_type r;
|
||
|
||
/* Perform a relocation. */
|
||
|
||
howto = &alpha_howto_table[r_type];
|
||
|
||
if (r_extern)
|
||
{
|
||
h = sym_hashes[r_symndx];
|
||
/* If h is NULL, that means that there is a reloc
|
||
against an external symbol which we thought was just
|
||
a debugging symbol. This should not happen. */
|
||
if (h == (struct ecoff_link_hash_entry *) NULL)
|
||
abort ();
|
||
}
|
||
else
|
||
{
|
||
if (r_symndx >= NUM_RELOC_SECTIONS)
|
||
s = NULL;
|
||
else
|
||
s = symndx_to_section[r_symndx];
|
||
|
||
if (s == (asection *) NULL)
|
||
abort ();
|
||
}
|
||
|
||
if (info->relocateable)
|
||
{
|
||
/* We are generating relocateable output, and must
|
||
convert the existing reloc. */
|
||
if (r_extern)
|
||
{
|
||
if (h->root.type != bfd_link_hash_defined
|
||
&& h->indx == -1)
|
||
{
|
||
/* This symbol is not being written out. */
|
||
if (! ((*info->callbacks->unattached_reloc)
|
||
(info, h->root.root.string, input_bfd,
|
||
input_section, r_vaddr - input_section->vma)))
|
||
return false;
|
||
}
|
||
|
||
relocation = alpha_convert_external_reloc (output_bfd,
|
||
info,
|
||
input_bfd,
|
||
ext_rel,
|
||
h);
|
||
}
|
||
else
|
||
{
|
||
/* This is a relocation against a section. Adjust
|
||
the value by the amount the section moved. */
|
||
relocation = (s->output_section->vma
|
||
+ s->output_offset
|
||
- s->vma);
|
||
}
|
||
|
||
/* If this is PC relative, the existing object file
|
||
appears to already have the reloc worked out. We
|
||
must subtract out the old value and add in the new
|
||
one. */
|
||
if (howto->pc_relative)
|
||
relocation -= (input_section->output_section->vma
|
||
+ input_section->output_offset
|
||
- input_section->vma);
|
||
|
||
/* Put in any addend. */
|
||
relocation += addend;
|
||
|
||
/* Adjust the contents. */
|
||
r = _bfd_relocate_contents (howto, input_bfd, relocation,
|
||
(contents
|
||
+ r_vaddr
|
||
- input_section->vma));
|
||
}
|
||
else
|
||
{
|
||
/* We are producing a final executable. */
|
||
if (r_extern)
|
||
{
|
||
/* This is a reloc against a symbol. */
|
||
if (h->root.type == bfd_link_hash_defined)
|
||
{
|
||
asection *hsec;
|
||
|
||
hsec = h->root.u.def.section;
|
||
relocation = (h->root.u.def.value
|
||
+ hsec->output_section->vma
|
||
+ hsec->output_offset);
|
||
}
|
||
else
|
||
{
|
||
if (! ((*info->callbacks->undefined_symbol)
|
||
(info, h->root.root.string, input_bfd,
|
||
input_section,
|
||
r_vaddr - input_section->vma)))
|
||
return false;
|
||
relocation = 0;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* This is a reloc against a section. */
|
||
relocation = (s->output_section->vma
|
||
+ s->output_offset
|
||
- s->vma);
|
||
|
||
/* Adjust a PC relative relocation by removing the
|
||
reference to the original source section. */
|
||
if (howto->pc_relative)
|
||
relocation += input_section->vma;
|
||
}
|
||
|
||
r = _bfd_final_link_relocate (howto,
|
||
input_bfd,
|
||
input_section,
|
||
contents,
|
||
r_vaddr - input_section->vma,
|
||
relocation,
|
||
addend);
|
||
}
|
||
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
switch (r)
|
||
{
|
||
default:
|
||
case bfd_reloc_outofrange:
|
||
abort ();
|
||
case bfd_reloc_overflow:
|
||
{
|
||
const char *name;
|
||
|
||
if (r_extern)
|
||
name = sym_hashes[r_symndx]->root.root.string;
|
||
else
|
||
name = bfd_section_name (input_bfd,
|
||
symndx_to_section[r_symndx]);
|
||
if (! ((*info->callbacks->reloc_overflow)
|
||
(info, name, alpha_howto_table[r_type].name,
|
||
(bfd_vma) 0, input_bfd, input_section,
|
||
r_vaddr - input_section->vma)))
|
||
return false;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (info->relocateable && adjust_addrp)
|
||
{
|
||
/* Change the address of the relocation. */
|
||
bfd_h_put_64 (input_bfd,
|
||
(input_section->output_section->vma
|
||
+ input_section->output_offset
|
||
- input_section->vma
|
||
+ r_vaddr),
|
||
(bfd_byte *) ext_rel->r_vaddr);
|
||
}
|
||
|
||
if (gp_usedp && gp_undefined)
|
||
{
|
||
if (! ((*info->callbacks->reloc_dangerous)
|
||
(info, "GP relative relocation when GP not defined",
|
||
input_bfd, input_section, r_vaddr - input_section->vma)))
|
||
return false;
|
||
/* Only give the error once per link. */
|
||
ecoff_data (output_bfd)->gp = gp = 4;
|
||
gp_undefined = false;
|
||
}
|
||
}
|
||
|
||
if (tos != 0)
|
||
abort ();
|
||
|
||
return true;
|
||
}
|
||
|
||
/* This is the ECOFF backend structure. The backend field of the
|
||
target vector points to this. */
|
||
|
||
static const struct ecoff_backend_data alpha_ecoff_backend_data =
|
||
{
|
||
/* COFF backend structure. */
|
||
{
|
||
(void (*) PARAMS ((bfd *,PTR,int,int,int,int,PTR))) bfd_void, /* aux_in */
|
||
(void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* sym_in */
|
||
(void (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* lineno_in */
|
||
(unsigned (*) PARAMS ((bfd *,PTR,int,int,int,int,PTR)))bfd_void,/*aux_out*/
|
||
(unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* sym_out */
|
||
(unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* lineno_out */
|
||
(unsigned (*) PARAMS ((bfd *,PTR,PTR))) bfd_void, /* reloc_out */
|
||
alpha_ecoff_swap_filehdr_out, alpha_ecoff_swap_aouthdr_out,
|
||
alpha_ecoff_swap_scnhdr_out,
|
||
FILHSZ, AOUTSZ, SCNHSZ, 0, 0, 0, 0, true,
|
||
alpha_ecoff_swap_filehdr_in, alpha_ecoff_swap_aouthdr_in,
|
||
alpha_ecoff_swap_scnhdr_in, NULL,
|
||
alpha_ecoff_bad_format_hook, _bfd_ecoff_set_arch_mach_hook,
|
||
alpha_ecoff_mkobject_hook, _bfd_ecoff_styp_to_sec_flags,
|
||
_bfd_ecoff_make_section_hook, _bfd_ecoff_set_alignment_hook,
|
||
_bfd_ecoff_slurp_symbol_table,
|
||
NULL, NULL, NULL, NULL, NULL, NULL
|
||
},
|
||
/* Supported architecture. */
|
||
bfd_arch_alpha,
|
||
/* Initial portion of armap string. */
|
||
"________64",
|
||
/* The page boundary used to align sections in a demand-paged
|
||
executable file. E.g., 0x1000. */
|
||
0x2000,
|
||
/* 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. */
|
||
true,
|
||
/* Bitsize of constructor entries. */
|
||
64,
|
||
/* Reloc to use for constructor entries. */
|
||
&alpha_howto_table[ALPHA_R_REFQUAD],
|
||
{
|
||
/* Symbol table magic number. */
|
||
magicSym2,
|
||
/* Alignment of debugging information. E.g., 4. */
|
||
8,
|
||
/* Sizes of external symbolic information. */
|
||
sizeof (struct hdr_ext),
|
||
sizeof (struct dnr_ext),
|
||
sizeof (struct pdr_ext),
|
||
sizeof (struct sym_ext),
|
||
sizeof (struct opt_ext),
|
||
sizeof (struct fdr_ext),
|
||
sizeof (struct rfd_ext),
|
||
sizeof (struct ext_ext),
|
||
/* Functions to swap in external symbolic data. */
|
||
ecoff_swap_hdr_in,
|
||
ecoff_swap_dnr_in,
|
||
ecoff_swap_pdr_in,
|
||
ecoff_swap_sym_in,
|
||
ecoff_swap_opt_in,
|
||
ecoff_swap_fdr_in,
|
||
ecoff_swap_rfd_in,
|
||
ecoff_swap_ext_in,
|
||
_bfd_ecoff_swap_tir_in,
|
||
_bfd_ecoff_swap_rndx_in,
|
||
/* Functions to swap out external symbolic data. */
|
||
ecoff_swap_hdr_out,
|
||
ecoff_swap_dnr_out,
|
||
ecoff_swap_pdr_out,
|
||
ecoff_swap_sym_out,
|
||
ecoff_swap_opt_out,
|
||
ecoff_swap_fdr_out,
|
||
ecoff_swap_rfd_out,
|
||
ecoff_swap_ext_out,
|
||
_bfd_ecoff_swap_tir_out,
|
||
_bfd_ecoff_swap_rndx_out,
|
||
/* Function to read in symbolic data. */
|
||
_bfd_ecoff_slurp_symbolic_info
|
||
},
|
||
/* External reloc size. */
|
||
RELSZ,
|
||
/* Reloc swapping functions. */
|
||
alpha_ecoff_swap_reloc_in,
|
||
alpha_ecoff_swap_reloc_out,
|
||
/* Backend reloc tweaking. */
|
||
alpha_adjust_reloc_in,
|
||
alpha_adjust_reloc_out,
|
||
/* Relocate section contents while linking. */
|
||
alpha_relocate_section
|
||
};
|
||
|
||
/* Looking up a reloc type is Alpha specific. */
|
||
#define _bfd_ecoff_bfd_reloc_type_lookup alpha_bfd_reloc_type_lookup
|
||
|
||
/* So is getting relocated section contents. */
|
||
#define _bfd_ecoff_bfd_get_relocated_section_contents \
|
||
alpha_ecoff_get_relocated_section_contents
|
||
|
||
/* Relaxing sections is generic. */
|
||
#define _bfd_ecoff_bfd_relax_section bfd_generic_relax_section
|
||
|
||
const bfd_target ecoffalpha_little_vec =
|
||
{
|
||
"ecoff-littlealpha", /* name */
|
||
bfd_target_ecoff_flavour,
|
||
false, /* data byte order is little */
|
||
false, /* header byte order is little */
|
||
|
||
(HAS_RELOC | EXEC_P | /* object flags */
|
||
HAS_LINENO | HAS_DEBUG |
|
||
HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
|
||
|
||
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* sect
|
||
flags */
|
||
0, /* leading underscore */
|
||
' ', /* ar_pad_char */
|
||
15, /* ar_max_namelen */
|
||
4, /* minimum alignment power */
|
||
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
|
||
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
|
||
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
|
||
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
|
||
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
|
||
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
|
||
|
||
{_bfd_dummy_target, alpha_ecoff_object_p, /* bfd_check_format */
|
||
_bfd_ecoff_archive_p, _bfd_dummy_target},
|
||
{bfd_false, _bfd_ecoff_mkobject, /* bfd_set_format */
|
||
_bfd_generic_mkarchive, bfd_false},
|
||
{bfd_false, _bfd_ecoff_write_object_contents, /* bfd_write_contents */
|
||
_bfd_write_archive_contents, bfd_false},
|
||
|
||
BFD_JUMP_TABLE_GENERIC (_bfd_ecoff),
|
||
BFD_JUMP_TABLE_COPY (_bfd_ecoff),
|
||
BFD_JUMP_TABLE_CORE (_bfd_nocore),
|
||
BFD_JUMP_TABLE_ARCHIVE (_bfd_ecoff),
|
||
BFD_JUMP_TABLE_SYMBOLS (_bfd_ecoff),
|
||
BFD_JUMP_TABLE_RELOCS (_bfd_ecoff),
|
||
BFD_JUMP_TABLE_WRITE (_bfd_ecoff),
|
||
BFD_JUMP_TABLE_LINK (_bfd_ecoff),
|
||
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
|
||
|
||
(PTR) &alpha_ecoff_backend_data
|
||
};
|