7dba9362c1
This arranges for __start and __stop symbols to be defined before garbage collection, for all target formats. That should allow the COFF and PE --gc-sections to keep a singleton orphan input section, a feature lost by 2017-06-13 commitcbd0eecf26. The fancier ELF treatment of keeping all input sections associated with a __start or __stop symbol, from 2015-10-23 commit1cce69b9dc, is retained. .startof. and .sizeof. symbols are deliberately not defined before garbage collection, so these won't affect garbage collection of sections. The patch also ensures __start, __stop, .startof. and .sizeof. symbols are defined before target size_dynamic_sections is called, albeit with a preliminary value, so that target code doesn't need to cope with a symbol changing from undefined at size_dynamic_sections to defined at relocate_section. Also, a number of problems with the testcases have been fixed. PR ld/20022 PR ld/21557 PR ld/21562 PR ld/21571 include/ * bfdlink.h (struct bfd_link_hash_entry): Delete undef.section. bfd/ * targets.c (struct bfd_target): Add _bfd_define_start_stop. (BFD_JUMP_TABLE_LINK): Likewise. * elf-bfd.h (bfd_elf_define_start_stop): Declare. * elflink.c (_bfd_elf_gc_mark_rsec): Update comment. (bfd_elf_define_start_stop): New function. * linker.c (bfd_generic_define_start_stop): New function. * coff64-rs6000.c (rs6000_xcoff64_vec, rs6000_xcoff64_aix_vec): Init new field. * aout-adobe.c (aout_32_bfd_define_start_stop): Define. * aout-target.h (MY_bfd_define_start_stop): Define. * aout-tic30.c (MY_bfd_define_start_stop): Define. * binary.c (binary_bfd_define_start_stop): Define. * bout.c (b_out_bfd_define_start_stop): Define. * coff-alpha.c (_bfd_ecoff_bfd_define_start_stop): Define. * coff-mips.c (_bfd_ecoff_bfd_define_start_stop): Define. * coff-rs6000.c (_bfd_xcoff_bfd_define_start_stop): Define. * coffcode.h (coff_bfd_define_start_stop): Define. * elfxx-target.h (bfd_elfNN_bfd_define_start_stop): Define. * i386msdos.c (msdos_bfd_define_start_stop): Define. * i386os9k.c (os9k_bfd_define_start_stop): Define. * ieee.c (ieee_bfd_define_start_stop): Define. * ihex.c (ihex_bfd_define_start_stop): Define. * libbfd-in.h (_bfd_nolink_bfd_define_start_stop): Define. * mach-o-target.c (bfd_mach_o_bfd_define_start_stop): Define. * mmo.c (mmo_bfd_define_start_stop): Define. * nlm-target.h (nlm_bfd_define_start_stop): Define. * oasys.c (oasys_bfd_define_start_stop): Define. * pef.c (bfd_pef_bfd_define_start_stop): Define. * plugin.c (bfd_plugin_bfd_define_start_stop): Define. * ppcboot.c (ppcboot_bfd_define_start_stop): Define. * som.c (som_bfd_define_start_stop): Define. * srec.c (srec_bfd_define_start_stop): Define. * tekhex.c (tekhex_bfd_define_start_stop): Define. * versados.c (versados_bfd_define_start_stop): Define. * vms-alpha.c (vms_bfd_define_start_stop): Define. (alpha_vms_bfd_define_start_stop): Define. * xsym.c (bfd_sym_bfd_define_start_stop): Define. * bfd-in2.h: Regenerate. * libbfd.h: Regenerate. ld/ * emultempl/elf32.em (gld${EMULATION_NAME}_after_open): Don't set __start/__stop syms here. * ldlang.c (lang_set_startof): Delete. (start_stop_syms, start_stop_count, start_stop_alloc): New vars. (lang_define_start_stop, lang_init_start_stop, foreach_start_stop, undef_start_stop, lang_undef_start_stop, lang_init_startof_sizeof, set_start_stop, lang_finalize_start_stop): New functions. (lang_process): Call _start_stop functions. * testsuite/ld-elf/pr21562a.d: Use xfail rather than notarget. Correct typos and list of xfail targets. * testsuite/ld-elf/pr21562b.d: Likewise. * testsuite/ld-elf/pr21562c.d: Likewise. * testsuite/ld-elf/pr21562d.d: Likewise. * testsuite/ld-elf/pr21562e.d: Likewise. * testsuite/ld-elf/pr21562f.d: Likewise. * testsuite/ld-elf/pr21562g.d: Likewise. * testsuite/ld-elf/pr21562h.d: Likewise. * testsuite/ld-elf/pr21562i.d: Likewise. * testsuite/ld-elf/pr21562j.d: Likewise. * testsuite/ld-elf/pr21562k.d: Likewise. * testsuite/ld-elf/pr21562l.d: Likewise. * testsuite/ld-elf/pr21562m.d: Likewise. * testsuite/ld-elf/pr21562n.d: Likewise. * testsuite/ld-elf/sizeofa.d: Likewise. Adjust to pass for generic ELF. * testsuite/ld-elf/sizeofb.d: Likewise. * testsuite/ld-elf/startofa.d: Likewise. * testsuite/ld-elf/startofb.d: Likewise.
1497 lines
45 KiB
C
1497 lines
45 KiB
C
/* BFD back-end for MIPS Extended-Coff files.
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Copyright (C) 1990-2017 Free Software Foundation, Inc.
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Original version by Per Bothner.
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Full support added by Ian Lance Taylor, ian@cygnus.com.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include "sysdep.h"
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#include "bfd.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/mips.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 bfd_reloc_status_type
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mips_generic_reloc
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(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
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static bfd_reloc_status_type
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mips_refhi_reloc
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(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
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static bfd_reloc_status_type
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mips_reflo_reloc
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(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
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static bfd_reloc_status_type
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mips_gprel_reloc
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(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
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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. */
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#define MIPSECOFF
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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 mips_ecoff_swap_filehdr_in
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#define coff_swap_filehdr_out mips_ecoff_swap_filehdr_out
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#define coff_swap_aouthdr_in mips_ecoff_swap_aouthdr_in
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#define coff_swap_aouthdr_out mips_ecoff_swap_aouthdr_out
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#define coff_swap_scnhdr_in mips_ecoff_swap_scnhdr_in
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#define coff_swap_scnhdr_out mips_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_32
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#include "ecoffswap.h"
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/* How to process the various relocs types. */
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static reloc_howto_type mips_howto_table[] =
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{
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/* Reloc type 0 is ignored. The reloc reading code ensures that
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this is a reference to the .abs section, which will cause
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bfd_perform_relocation to do nothing. */
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HOWTO (MIPS_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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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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0, /* special_function */
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"IGNORE", /* 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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/* A 16 bit reference to a symbol, normally from a data section. */
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HOWTO (MIPS_R_REFHALF, /* type */
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0, /* rightshift */
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1, /* 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_bitfield, /* complain_on_overflow */
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mips_generic_reloc, /* special_function */
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"REFHALF", /* 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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/* A 32 bit reference to a symbol, normally from a data section. */
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HOWTO (MIPS_R_REFWORD, /* 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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mips_generic_reloc, /* special_function */
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"REFWORD", /* 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 26 bit absolute jump address. */
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HOWTO (MIPS_R_JMPADDR, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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26, /* 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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/* This needs complex overflow
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detection, because the upper four
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bits must match the PC. */
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mips_generic_reloc, /* special_function */
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"JMPADDR", /* name */
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TRUE, /* partial_inplace */
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0x3ffffff, /* src_mask */
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0x3ffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* The high 16 bits of a symbol value. Handled by the function
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mips_refhi_reloc. */
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HOWTO (MIPS_R_REFHI, /* 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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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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mips_refhi_reloc, /* special_function */
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"REFHI", /* 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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/* The low 16 bits of a symbol value. */
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HOWTO (MIPS_R_REFLO, /* 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_dont, /* complain_on_overflow */
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mips_reflo_reloc, /* special_function */
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"REFLO", /* 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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/* A reference to an offset from the gp register. Handled by the
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function mips_gprel_reloc. */
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HOWTO (MIPS_R_GPREL, /* 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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mips_gprel_reloc, /* special_function */
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"GPREL", /* 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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/* A reference to a literal using an offset from the gp register.
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Handled by the function mips_gprel_reloc. */
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HOWTO (MIPS_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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mips_gprel_reloc, /* 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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EMPTY_HOWTO (8),
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EMPTY_HOWTO (9),
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EMPTY_HOWTO (10),
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EMPTY_HOWTO (11),
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/* FIXME: This relocation is used (internally only) to represent branches
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when assembling. It should never appear in output files, and
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be removed. (It used to be used for embedded-PIC support.) */
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HOWTO (MIPS_R_PCREL16, /* type */
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2, /* 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_signed, /* complain_on_overflow */
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mips_generic_reloc, /* special_function */
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"PCREL16", /* 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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TRUE), /* pcrel_offset */
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};
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#define MIPS_HOWTO_COUNT \
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(sizeof mips_howto_table / sizeof mips_howto_table[0])
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/* See whether the magic number matches. */
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static bfd_boolean
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mips_ecoff_bad_format_hook (bfd * abfd, void * filehdr)
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{
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struct internal_filehdr *internal_f = (struct internal_filehdr *) filehdr;
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switch (internal_f->f_magic)
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{
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case MIPS_MAGIC_1:
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/* I don't know what endianness this implies. */
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return TRUE;
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case MIPS_MAGIC_BIG:
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case MIPS_MAGIC_BIG2:
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case MIPS_MAGIC_BIG3:
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return bfd_big_endian (abfd);
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case MIPS_MAGIC_LITTLE:
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case MIPS_MAGIC_LITTLE2:
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case MIPS_MAGIC_LITTLE3:
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return bfd_little_endian (abfd);
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default:
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return FALSE;
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}
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}
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/* Reloc handling. MIPS ECOFF relocs are packed into 8 bytes in
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external form. They use a bit which indicates whether the symbol
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is external. */
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/* Swap a reloc in. */
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static void
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mips_ecoff_swap_reloc_in (bfd * abfd,
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void * ext_ptr,
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struct internal_reloc *intern)
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{
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const RELOC *ext = (RELOC *) ext_ptr;
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intern->r_vaddr = H_GET_32 (abfd, ext->r_vaddr);
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if (bfd_header_big_endian (abfd))
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{
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intern->r_symndx = (((int) ext->r_bits[0]
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<< RELOC_BITS0_SYMNDX_SH_LEFT_BIG)
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| ((int) ext->r_bits[1]
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<< RELOC_BITS1_SYMNDX_SH_LEFT_BIG)
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| ((int) ext->r_bits[2]
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<< RELOC_BITS2_SYMNDX_SH_LEFT_BIG));
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intern->r_type = ((ext->r_bits[3] & RELOC_BITS3_TYPE_BIG)
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>> RELOC_BITS3_TYPE_SH_BIG);
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intern->r_extern = (ext->r_bits[3] & RELOC_BITS3_EXTERN_BIG) != 0;
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}
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else
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{
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intern->r_symndx = (((int) ext->r_bits[0]
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<< RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE)
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| ((int) ext->r_bits[1]
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<< RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE)
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| ((int) ext->r_bits[2]
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<< RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE));
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intern->r_type = (((ext->r_bits[3] & RELOC_BITS3_TYPE_LITTLE)
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>> RELOC_BITS3_TYPE_SH_LITTLE)
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| ((ext->r_bits[3] & RELOC_BITS3_TYPEHI_LITTLE)
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<< RELOC_BITS3_TYPEHI_SH_LITTLE));
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intern->r_extern = (ext->r_bits[3] & RELOC_BITS3_EXTERN_LITTLE) != 0;
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}
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}
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/* Swap a reloc out. */
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static void
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mips_ecoff_swap_reloc_out (bfd * abfd,
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const struct internal_reloc * intern,
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void * dst)
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{
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RELOC *ext = (RELOC *) dst;
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long r_symndx;
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BFD_ASSERT (intern->r_extern
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|| (intern->r_symndx >= 0 && intern->r_symndx <= 12));
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r_symndx = intern->r_symndx;
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H_PUT_32 (abfd, intern->r_vaddr, ext->r_vaddr);
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if (bfd_header_big_endian (abfd))
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{
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ext->r_bits[0] = r_symndx >> RELOC_BITS0_SYMNDX_SH_LEFT_BIG;
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ext->r_bits[1] = r_symndx >> RELOC_BITS1_SYMNDX_SH_LEFT_BIG;
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ext->r_bits[2] = r_symndx >> RELOC_BITS2_SYMNDX_SH_LEFT_BIG;
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ext->r_bits[3] = (((intern->r_type << RELOC_BITS3_TYPE_SH_BIG)
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& RELOC_BITS3_TYPE_BIG)
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| (intern->r_extern ? RELOC_BITS3_EXTERN_BIG : 0));
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}
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else
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{
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ext->r_bits[0] = r_symndx >> RELOC_BITS0_SYMNDX_SH_LEFT_LITTLE;
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ext->r_bits[1] = r_symndx >> RELOC_BITS1_SYMNDX_SH_LEFT_LITTLE;
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ext->r_bits[2] = r_symndx >> RELOC_BITS2_SYMNDX_SH_LEFT_LITTLE;
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ext->r_bits[3] = (((intern->r_type << RELOC_BITS3_TYPE_SH_LITTLE)
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& RELOC_BITS3_TYPE_LITTLE)
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| ((intern->r_type >> RELOC_BITS3_TYPEHI_SH_LITTLE
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& RELOC_BITS3_TYPEHI_LITTLE))
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| (intern->r_extern ? RELOC_BITS3_EXTERN_LITTLE : 0));
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}
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}
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/* Finish canonicalizing a reloc. Part of this is generic to all
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ECOFF targets, and that part is in ecoff.c. The rest is done in
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this backend routine. It must fill in the howto field. */
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static void
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mips_adjust_reloc_in (bfd *abfd,
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const struct internal_reloc *intern,
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arelent *rptr)
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{
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if (intern->r_type > MIPS_R_PCREL16)
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abort ();
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if (! intern->r_extern
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&& (intern->r_type == MIPS_R_GPREL
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|| intern->r_type == MIPS_R_LITERAL))
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rptr->addend += ecoff_data (abfd)->gp;
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/* If the type is MIPS_R_IGNORE, make sure this is a reference to
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the absolute section so that the reloc is ignored. */
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if (intern->r_type == MIPS_R_IGNORE)
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rptr->sym_ptr_ptr = bfd_abs_section_ptr->symbol_ptr_ptr;
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rptr->howto = &mips_howto_table[intern->r_type];
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}
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|
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/* Make any adjustments needed to a reloc before writing it out. None
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are needed for MIPS. */
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|
||
static void
|
||
mips_adjust_reloc_out (bfd *abfd ATTRIBUTE_UNUSED,
|
||
const arelent *rel ATTRIBUTE_UNUSED,
|
||
struct internal_reloc *intern ATTRIBUTE_UNUSED)
|
||
{
|
||
}
|
||
|
||
/* ECOFF relocs are either against external symbols, or against
|
||
sections. If we are producing relocatable output, and the reloc
|
||
is against an external symbol, and nothing has given us any
|
||
additional addend, the resulting reloc will also be against the
|
||
same symbol. In such a case, we don't want to change anything
|
||
about the way the reloc is handled, since it will all be done at
|
||
final link time. Rather than put special case code into
|
||
bfd_perform_relocation, all the reloc types use this howto
|
||
function. It just short circuits the reloc if producing
|
||
relocatable output against an external symbol. */
|
||
|
||
static bfd_reloc_status_type
|
||
mips_generic_reloc (bfd *abfd ATTRIBUTE_UNUSED,
|
||
arelent *reloc_entry,
|
||
asymbol *symbol,
|
||
void * data ATTRIBUTE_UNUSED,
|
||
asection *input_section,
|
||
bfd *output_bfd,
|
||
char **error_message ATTRIBUTE_UNUSED)
|
||
{
|
||
if (output_bfd != (bfd *) NULL
|
||
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
||
&& reloc_entry->addend == 0)
|
||
{
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
return bfd_reloc_continue;
|
||
}
|
||
|
||
/* Do a REFHI relocation. This has to be done in combination with a
|
||
REFLO reloc, because there is a carry from the REFLO to the REFHI.
|
||
Here we just save the information we need; we do the actual
|
||
relocation when we see the REFLO. MIPS ECOFF requires that the
|
||
REFLO immediately follow the REFHI. As a GNU extension, we permit
|
||
an arbitrary number of HI relocs to be associated with a single LO
|
||
reloc. This extension permits gcc to output the HI and LO relocs
|
||
itself. */
|
||
|
||
struct mips_hi
|
||
{
|
||
struct mips_hi *next;
|
||
bfd_byte *addr;
|
||
bfd_vma addend;
|
||
};
|
||
|
||
/* FIXME: This should not be a static variable. */
|
||
|
||
static struct mips_hi *mips_refhi_list;
|
||
|
||
static bfd_reloc_status_type
|
||
mips_refhi_reloc (bfd *abfd ATTRIBUTE_UNUSED,
|
||
arelent *reloc_entry,
|
||
asymbol *symbol,
|
||
void * data,
|
||
asection *input_section,
|
||
bfd *output_bfd,
|
||
char **error_message ATTRIBUTE_UNUSED)
|
||
{
|
||
bfd_reloc_status_type ret;
|
||
bfd_vma relocation;
|
||
struct mips_hi *n;
|
||
|
||
/* If we're relocating, and this an external symbol, we don't want
|
||
to change anything. */
|
||
if (output_bfd != (bfd *) NULL
|
||
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
||
&& reloc_entry->addend == 0)
|
||
{
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
ret = bfd_reloc_ok;
|
||
if (bfd_is_und_section (symbol->section)
|
||
&& output_bfd == (bfd *) NULL)
|
||
ret = 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 += reloc_entry->addend;
|
||
|
||
if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
|
||
return bfd_reloc_outofrange;
|
||
|
||
/* Save the information, and let REFLO do the actual relocation. */
|
||
n = (struct mips_hi *) bfd_malloc ((bfd_size_type) sizeof *n);
|
||
if (n == NULL)
|
||
return bfd_reloc_outofrange;
|
||
n->addr = (bfd_byte *) data + reloc_entry->address;
|
||
n->addend = relocation;
|
||
n->next = mips_refhi_list;
|
||
mips_refhi_list = n;
|
||
|
||
if (output_bfd != (bfd *) NULL)
|
||
reloc_entry->address += input_section->output_offset;
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* Do a REFLO relocation. This is a straightforward 16 bit inplace
|
||
relocation; this function exists in order to do the REFHI
|
||
relocation described above. */
|
||
|
||
static bfd_reloc_status_type
|
||
mips_reflo_reloc (bfd *abfd ATTRIBUTE_UNUSED,
|
||
arelent *reloc_entry,
|
||
asymbol *symbol,
|
||
void * data,
|
||
asection *input_section,
|
||
bfd *output_bfd,
|
||
char **error_message ATTRIBUTE_UNUSED)
|
||
{
|
||
if (mips_refhi_list != NULL)
|
||
{
|
||
struct mips_hi *l;
|
||
|
||
l = mips_refhi_list;
|
||
while (l != NULL)
|
||
{
|
||
unsigned long insn;
|
||
unsigned long val;
|
||
unsigned long vallo;
|
||
struct mips_hi *next;
|
||
|
||
/* Do the REFHI relocation. Note that we actually don't
|
||
need to know anything about the REFLO itself, except
|
||
where to find the low 16 bits of the addend needed by the
|
||
REFHI. */
|
||
insn = bfd_get_32 (abfd, l->addr);
|
||
vallo = (bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address)
|
||
& 0xffff);
|
||
val = ((insn & 0xffff) << 16) + vallo;
|
||
val += l->addend;
|
||
|
||
/* The low order 16 bits are always treated as a signed
|
||
value. Therefore, a negative value in the low order bits
|
||
requires an adjustment in the high order bits. We need
|
||
to make this adjustment in two ways: once for the bits we
|
||
took from the data, and once for the bits we are putting
|
||
back in to the data. */
|
||
if ((vallo & 0x8000) != 0)
|
||
val -= 0x10000;
|
||
if ((val & 0x8000) != 0)
|
||
val += 0x10000;
|
||
|
||
insn = (insn &~ (unsigned) 0xffff) | ((val >> 16) & 0xffff);
|
||
bfd_put_32 (abfd, (bfd_vma) insn, l->addr);
|
||
|
||
next = l->next;
|
||
free (l);
|
||
l = next;
|
||
}
|
||
|
||
mips_refhi_list = NULL;
|
||
}
|
||
|
||
/* Now do the REFLO reloc in the usual way. */
|
||
return mips_generic_reloc (abfd, reloc_entry, symbol, data,
|
||
input_section, output_bfd, error_message);
|
||
}
|
||
|
||
/* Do a GPREL relocation. This is a 16 bit value which must become
|
||
the offset from the gp register. */
|
||
|
||
static bfd_reloc_status_type
|
||
mips_gprel_reloc (bfd *abfd ATTRIBUTE_UNUSED,
|
||
arelent *reloc_entry,
|
||
asymbol *symbol,
|
||
void * data,
|
||
asection *input_section,
|
||
bfd *output_bfd,
|
||
char **error_message ATTRIBUTE_UNUSED)
|
||
{
|
||
bfd_boolean relocatable;
|
||
bfd_vma gp;
|
||
bfd_vma relocation;
|
||
unsigned long val;
|
||
unsigned long insn;
|
||
|
||
/* If we're relocating, and this is an external symbol with no
|
||
addend, we don't want to change anything. We will only have an
|
||
addend if this is a newly created reloc, not read from an ECOFF
|
||
file. */
|
||
if (output_bfd != (bfd *) NULL
|
||
&& (symbol->flags & BSF_SECTION_SYM) == 0
|
||
&& reloc_entry->addend == 0)
|
||
{
|
||
reloc_entry->address += input_section->output_offset;
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
if (output_bfd != (bfd *) NULL)
|
||
relocatable = TRUE;
|
||
else
|
||
{
|
||
relocatable = FALSE;
|
||
output_bfd = symbol->section->output_section->owner;
|
||
}
|
||
|
||
if (bfd_is_und_section (symbol->section) && ! relocatable)
|
||
return bfd_reloc_undefined;
|
||
|
||
/* We have to figure out the gp value, so that we can adjust the
|
||
symbol value correctly. We look up the symbol _gp in the output
|
||
BFD. If we can't find it, we're stuck. We cache it in the ECOFF
|
||
target data. We don't need to adjust the symbol value for an
|
||
external symbol if we are producing relocatable output. */
|
||
gp = _bfd_get_gp_value (output_bfd);
|
||
if (gp == 0
|
||
&& (! relocatable
|
||
|| (symbol->flags & BSF_SECTION_SYM) != 0))
|
||
{
|
||
if (relocatable)
|
||
{
|
||
/* Make up a value. */
|
||
gp = symbol->section->output_section->vma + 0x4000;
|
||
_bfd_set_gp_value (output_bfd, gp);
|
||
}
|
||
else
|
||
{
|
||
unsigned int count;
|
||
asymbol **sym;
|
||
unsigned int i;
|
||
|
||
count = bfd_get_symcount (output_bfd);
|
||
sym = bfd_get_outsymbols (output_bfd);
|
||
|
||
if (sym == (asymbol **) NULL)
|
||
i = count;
|
||
else
|
||
{
|
||
for (i = 0; i < count; i++, sym++)
|
||
{
|
||
register const char *name;
|
||
|
||
name = bfd_asymbol_name (*sym);
|
||
if (*name == '_' && strcmp (name, "_gp") == 0)
|
||
{
|
||
gp = bfd_asymbol_value (*sym);
|
||
_bfd_set_gp_value (output_bfd, gp);
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (i >= count)
|
||
{
|
||
/* Only get the error once. */
|
||
gp = 4;
|
||
_bfd_set_gp_value (output_bfd, gp);
|
||
*error_message =
|
||
(char *) _("GP relative relocation when _gp not defined");
|
||
return bfd_reloc_dangerous;
|
||
}
|
||
}
|
||
}
|
||
|
||
if (bfd_is_com_section (symbol->section))
|
||
relocation = 0;
|
||
else
|
||
relocation = symbol->value;
|
||
|
||
relocation += symbol->section->output_section->vma;
|
||
relocation += symbol->section->output_offset;
|
||
|
||
if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
|
||
return bfd_reloc_outofrange;
|
||
|
||
insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
|
||
|
||
/* Set val to the offset into the section or symbol. */
|
||
val = ((insn & 0xffff) + reloc_entry->addend) & 0xffff;
|
||
if (val & 0x8000)
|
||
val -= 0x10000;
|
||
|
||
/* Adjust val for the final section location and GP value. If we
|
||
are producing relocatable output, we don't want to do this for
|
||
an external symbol. */
|
||
if (! relocatable
|
||
|| (symbol->flags & BSF_SECTION_SYM) != 0)
|
||
val += relocation - gp;
|
||
|
||
insn = (insn &~ (unsigned) 0xffff) | (val & 0xffff);
|
||
bfd_put_32 (abfd, (bfd_vma) insn, (bfd_byte *) data + reloc_entry->address);
|
||
|
||
if (relocatable)
|
||
reloc_entry->address += input_section->output_offset;
|
||
|
||
/* Make sure it fit in 16 bits. */
|
||
if ((long) val >= 0x8000 || (long) val < -0x8000)
|
||
return bfd_reloc_overflow;
|
||
|
||
return bfd_reloc_ok;
|
||
}
|
||
|
||
/* Get the howto structure for a generic reloc type. */
|
||
|
||
static reloc_howto_type *
|
||
mips_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
||
bfd_reloc_code_real_type code)
|
||
{
|
||
int mips_type;
|
||
|
||
switch (code)
|
||
{
|
||
case BFD_RELOC_16:
|
||
mips_type = MIPS_R_REFHALF;
|
||
break;
|
||
case BFD_RELOC_32:
|
||
case BFD_RELOC_CTOR:
|
||
mips_type = MIPS_R_REFWORD;
|
||
break;
|
||
case BFD_RELOC_MIPS_JMP:
|
||
mips_type = MIPS_R_JMPADDR;
|
||
break;
|
||
case BFD_RELOC_HI16_S:
|
||
mips_type = MIPS_R_REFHI;
|
||
break;
|
||
case BFD_RELOC_LO16:
|
||
mips_type = MIPS_R_REFLO;
|
||
break;
|
||
case BFD_RELOC_GPREL16:
|
||
mips_type = MIPS_R_GPREL;
|
||
break;
|
||
case BFD_RELOC_MIPS_LITERAL:
|
||
mips_type = MIPS_R_LITERAL;
|
||
break;
|
||
case BFD_RELOC_16_PCREL_S2:
|
||
mips_type = MIPS_R_PCREL16;
|
||
break;
|
||
default:
|
||
return (reloc_howto_type *) NULL;
|
||
}
|
||
|
||
return &mips_howto_table[mips_type];
|
||
}
|
||
|
||
static reloc_howto_type *
|
||
mips_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
||
const char *r_name)
|
||
{
|
||
unsigned int i;
|
||
|
||
for (i = 0;
|
||
i < sizeof (mips_howto_table) / sizeof (mips_howto_table[0]);
|
||
i++)
|
||
if (mips_howto_table[i].name != NULL
|
||
&& strcasecmp (mips_howto_table[i].name, r_name) == 0)
|
||
return &mips_howto_table[i];
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* A helper routine for mips_relocate_section which handles the REFHI
|
||
relocations. The REFHI relocation must be followed by a REFLO
|
||
relocation, and the addend used is formed from the addends of both
|
||
instructions. */
|
||
|
||
static void
|
||
mips_relocate_hi (struct internal_reloc *refhi,
|
||
struct internal_reloc *reflo,
|
||
bfd *input_bfd,
|
||
asection *input_section,
|
||
bfd_byte *contents,
|
||
bfd_vma relocation)
|
||
{
|
||
unsigned long insn;
|
||
unsigned long val;
|
||
unsigned long vallo;
|
||
|
||
if (refhi == NULL)
|
||
return;
|
||
|
||
insn = bfd_get_32 (input_bfd,
|
||
contents + refhi->r_vaddr - input_section->vma);
|
||
if (reflo == NULL)
|
||
vallo = 0;
|
||
else
|
||
vallo = (bfd_get_32 (input_bfd,
|
||
contents + reflo->r_vaddr - input_section->vma)
|
||
& 0xffff);
|
||
|
||
val = ((insn & 0xffff) << 16) + vallo;
|
||
val += relocation;
|
||
|
||
/* The low order 16 bits are always treated as a signed value.
|
||
Therefore, a negative value in the low order bits requires an
|
||
adjustment in the high order bits. We need to make this
|
||
adjustment in two ways: once for the bits we took from the data,
|
||
and once for the bits we are putting back in to the data. */
|
||
if ((vallo & 0x8000) != 0)
|
||
val -= 0x10000;
|
||
|
||
if ((val & 0x8000) != 0)
|
||
val += 0x10000;
|
||
|
||
insn = (insn &~ (unsigned) 0xffff) | ((val >> 16) & 0xffff);
|
||
bfd_put_32 (input_bfd, (bfd_vma) insn,
|
||
contents + refhi->r_vaddr - input_section->vma);
|
||
}
|
||
|
||
/* Relocate a section while linking a MIPS ECOFF file. */
|
||
|
||
static bfd_boolean
|
||
mips_relocate_section (bfd *output_bfd,
|
||
struct bfd_link_info *info,
|
||
bfd *input_bfd,
|
||
asection *input_section,
|
||
bfd_byte *contents,
|
||
void * external_relocs)
|
||
{
|
||
asection **symndx_to_section;
|
||
struct ecoff_link_hash_entry **sym_hashes;
|
||
bfd_vma gp;
|
||
bfd_boolean gp_undefined;
|
||
struct external_reloc *ext_rel;
|
||
struct external_reloc *ext_rel_end;
|
||
unsigned int i;
|
||
bfd_boolean got_lo;
|
||
struct internal_reloc lo_int_rel;
|
||
bfd_size_type amt;
|
||
|
||
BFD_ASSERT (input_bfd->xvec->byteorder
|
||
== output_bfd->xvec->byteorder);
|
||
|
||
/* 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)
|
||
{
|
||
amt = NUM_RELOC_SECTIONS * sizeof (asection *);
|
||
symndx_to_section = (asection **) bfd_alloc (input_bfd, amt);
|
||
if (!symndx_to_section)
|
||
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] = NULL;
|
||
symndx_to_section[RELOC_SECTION_PDATA] = NULL;
|
||
symndx_to_section[RELOC_SECTION_FINI] =
|
||
bfd_get_section_by_name (input_bfd, ".fini");
|
||
symndx_to_section[RELOC_SECTION_LITA] = NULL;
|
||
symndx_to_section[RELOC_SECTION_ABS] = NULL;
|
||
|
||
ecoff_data (input_bfd)->symndx_to_section = symndx_to_section;
|
||
}
|
||
|
||
sym_hashes = ecoff_data (input_bfd)->sym_hashes;
|
||
|
||
gp = _bfd_get_gp_value (output_bfd);
|
||
if (gp == 0)
|
||
gp_undefined = TRUE;
|
||
else
|
||
gp_undefined = FALSE;
|
||
|
||
got_lo = FALSE;
|
||
|
||
ext_rel = (struct external_reloc *) external_relocs;
|
||
ext_rel_end = ext_rel + input_section->reloc_count;
|
||
for (i = 0; ext_rel < ext_rel_end; ext_rel++, i++)
|
||
{
|
||
struct internal_reloc int_rel;
|
||
bfd_boolean use_lo = FALSE;
|
||
bfd_vma addend;
|
||
reloc_howto_type *howto;
|
||
struct ecoff_link_hash_entry *h = NULL;
|
||
asection *s = NULL;
|
||
bfd_vma relocation;
|
||
bfd_reloc_status_type r;
|
||
|
||
if (! got_lo)
|
||
mips_ecoff_swap_reloc_in (input_bfd, ext_rel, &int_rel);
|
||
else
|
||
{
|
||
int_rel = lo_int_rel;
|
||
got_lo = FALSE;
|
||
}
|
||
|
||
BFD_ASSERT (int_rel.r_type
|
||
< sizeof mips_howto_table / sizeof mips_howto_table[0]);
|
||
|
||
/* The REFHI reloc requires special handling. It must be followed
|
||
by a REFLO reloc, and the addend is formed from both relocs. */
|
||
if (int_rel.r_type == MIPS_R_REFHI)
|
||
{
|
||
struct external_reloc *lo_ext_rel;
|
||
|
||
/* As a GNU extension, permit an arbitrary number of REFHI
|
||
relocs before the REFLO reloc. This permits gcc to emit
|
||
the HI and LO relocs itself. */
|
||
for (lo_ext_rel = ext_rel + 1;
|
||
lo_ext_rel < ext_rel_end;
|
||
lo_ext_rel++)
|
||
{
|
||
mips_ecoff_swap_reloc_in (input_bfd, lo_ext_rel,
|
||
&lo_int_rel);
|
||
if (lo_int_rel.r_type != int_rel.r_type)
|
||
break;
|
||
}
|
||
|
||
if (lo_ext_rel < ext_rel_end
|
||
&& lo_int_rel.r_type == MIPS_R_REFLO
|
||
&& int_rel.r_extern == lo_int_rel.r_extern
|
||
&& int_rel.r_symndx == lo_int_rel.r_symndx)
|
||
{
|
||
use_lo = TRUE;
|
||
if (lo_ext_rel == ext_rel + 1)
|
||
got_lo = TRUE;
|
||
}
|
||
}
|
||
|
||
howto = &mips_howto_table[int_rel.r_type];
|
||
|
||
if (int_rel.r_extern)
|
||
{
|
||
h = sym_hashes[int_rel.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 (int_rel.r_symndx < 0 || int_rel.r_symndx >= NUM_RELOC_SECTIONS)
|
||
s = NULL;
|
||
else
|
||
s = symndx_to_section[int_rel.r_symndx];
|
||
|
||
if (s == (asection *) NULL)
|
||
abort ();
|
||
}
|
||
|
||
/* The GPREL reloc uses an addend: the difference in the GP
|
||
values. */
|
||
if (int_rel.r_type != MIPS_R_GPREL
|
||
&& int_rel.r_type != MIPS_R_LITERAL)
|
||
addend = 0;
|
||
else
|
||
{
|
||
if (gp_undefined)
|
||
{
|
||
(*info->callbacks->reloc_dangerous)
|
||
(info, _("GP relative relocation used when GP not defined"),
|
||
input_bfd, input_section,
|
||
int_rel.r_vaddr - input_section->vma);
|
||
/* Only give the error once per link. */
|
||
gp = 4;
|
||
_bfd_set_gp_value (output_bfd, gp);
|
||
gp_undefined = FALSE;
|
||
}
|
||
if (! int_rel.r_extern)
|
||
{
|
||
/* This is a relocation against a section. The current
|
||
addend in the instruction is the difference between
|
||
INPUT_SECTION->vma and the GP value of INPUT_BFD. We
|
||
must change this to be the difference between the
|
||
final definition (which will end up in RELOCATION)
|
||
and the GP value of OUTPUT_BFD (which is in GP). */
|
||
addend = ecoff_data (input_bfd)->gp - gp;
|
||
}
|
||
else if (! bfd_link_relocatable (info)
|
||
|| h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
{
|
||
/* This is a relocation against a defined symbol. The
|
||
current addend in the instruction is simply the
|
||
desired offset into the symbol (normally zero). We
|
||
are going to change this into a relocation against a
|
||
defined symbol, so we want the instruction to hold
|
||
the difference between the final definition of the
|
||
symbol (which will end up in RELOCATION) and the GP
|
||
value of OUTPUT_BFD (which is in GP). */
|
||
addend = - gp;
|
||
}
|
||
else
|
||
{
|
||
/* This is a relocation against an undefined or common
|
||
symbol. The current addend in the instruction is
|
||
simply the desired offset into the symbol (normally
|
||
zero). We are generating relocatable output, and we
|
||
aren't going to define this symbol, so we just leave
|
||
the instruction alone. */
|
||
addend = 0;
|
||
}
|
||
}
|
||
|
||
if (bfd_link_relocatable (info))
|
||
{
|
||
/* We are generating relocatable output, and must convert
|
||
the existing reloc. */
|
||
if (int_rel.r_extern)
|
||
{
|
||
if ((h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
&& ! bfd_is_abs_section (h->root.u.def.section))
|
||
{
|
||
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. */
|
||
int_rel.r_extern = 0;
|
||
|
||
/* Compute a new r_symndx value. */
|
||
s = h->root.u.def.section;
|
||
name = bfd_get_section_name (output_bfd,
|
||
s->output_section);
|
||
|
||
int_rel.r_symndx = -1;
|
||
switch (name[1])
|
||
{
|
||
case 'b':
|
||
if (strcmp (name, ".bss") == 0)
|
||
int_rel.r_symndx = RELOC_SECTION_BSS;
|
||
break;
|
||
case 'd':
|
||
if (strcmp (name, ".data") == 0)
|
||
int_rel.r_symndx = RELOC_SECTION_DATA;
|
||
break;
|
||
case 'f':
|
||
if (strcmp (name, ".fini") == 0)
|
||
int_rel.r_symndx = RELOC_SECTION_FINI;
|
||
break;
|
||
case 'i':
|
||
if (strcmp (name, ".init") == 0)
|
||
int_rel.r_symndx = RELOC_SECTION_INIT;
|
||
break;
|
||
case 'l':
|
||
if (strcmp (name, ".lit8") == 0)
|
||
int_rel.r_symndx = RELOC_SECTION_LIT8;
|
||
else if (strcmp (name, ".lit4") == 0)
|
||
int_rel.r_symndx = RELOC_SECTION_LIT4;
|
||
break;
|
||
case 'r':
|
||
if (strcmp (name, ".rdata") == 0)
|
||
int_rel.r_symndx = RELOC_SECTION_RDATA;
|
||
break;
|
||
case 's':
|
||
if (strcmp (name, ".sdata") == 0)
|
||
int_rel.r_symndx = RELOC_SECTION_SDATA;
|
||
else if (strcmp (name, ".sbss") == 0)
|
||
int_rel.r_symndx = RELOC_SECTION_SBSS;
|
||
break;
|
||
case 't':
|
||
if (strcmp (name, ".text") == 0)
|
||
int_rel.r_symndx = RELOC_SECTION_TEXT;
|
||
break;
|
||
}
|
||
|
||
if (int_rel.r_symndx == -1)
|
||
abort ();
|
||
|
||
/* Add the section VMA and the symbol value. */
|
||
relocation = (h->root.u.def.value
|
||
+ s->output_section->vma
|
||
+ s->output_offset);
|
||
|
||
/* For a PC relative relocation, the object file
|
||
currently holds just the addend. We must adjust
|
||
by the address to get the right value. */
|
||
if (howto->pc_relative)
|
||
relocation -= int_rel.r_vaddr - input_section->vma;
|
||
|
||
h = NULL;
|
||
}
|
||
else
|
||
{
|
||
/* Change the symndx value to the right one for the
|
||
output BFD. */
|
||
int_rel.r_symndx = h->indx;
|
||
if (int_rel.r_symndx == -1)
|
||
{
|
||
/* This symbol is not being written out. */
|
||
(*info->callbacks->unattached_reloc)
|
||
(info, h->root.root.string, input_bfd, input_section,
|
||
int_rel.r_vaddr - input_section->vma);
|
||
int_rel.r_symndx = 0;
|
||
}
|
||
relocation = 0;
|
||
}
|
||
}
|
||
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);
|
||
}
|
||
|
||
relocation += addend;
|
||
addend = 0;
|
||
|
||
/* Adjust a PC relative relocation by removing the reference
|
||
to the original address in the section and including the
|
||
reference to the new address. */
|
||
if (howto->pc_relative)
|
||
relocation -= (input_section->output_section->vma
|
||
+ input_section->output_offset
|
||
- input_section->vma);
|
||
|
||
/* Adjust the contents. */
|
||
if (relocation == 0)
|
||
r = bfd_reloc_ok;
|
||
else
|
||
{
|
||
if (int_rel.r_type != MIPS_R_REFHI)
|
||
r = _bfd_relocate_contents (howto, input_bfd, relocation,
|
||
(contents
|
||
+ int_rel.r_vaddr
|
||
- input_section->vma));
|
||
else
|
||
{
|
||
mips_relocate_hi (&int_rel,
|
||
use_lo ? &lo_int_rel : NULL,
|
||
input_bfd, input_section, contents,
|
||
relocation);
|
||
r = bfd_reloc_ok;
|
||
}
|
||
}
|
||
|
||
/* Adjust the reloc address. */
|
||
int_rel.r_vaddr += (input_section->output_section->vma
|
||
+ input_section->output_offset
|
||
- input_section->vma);
|
||
|
||
/* Save the changed reloc information. */
|
||
mips_ecoff_swap_reloc_out (input_bfd, &int_rel, ext_rel);
|
||
}
|
||
else
|
||
{
|
||
/* We are producing a final executable. */
|
||
if (int_rel.r_extern)
|
||
{
|
||
/* This is a reloc against a symbol. */
|
||
if (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
{
|
||
asection *hsec;
|
||
|
||
hsec = h->root.u.def.section;
|
||
relocation = (h->root.u.def.value
|
||
+ hsec->output_section->vma
|
||
+ hsec->output_offset);
|
||
}
|
||
else
|
||
{
|
||
(*info->callbacks->undefined_symbol)
|
||
(info, h->root.root.string, input_bfd, input_section,
|
||
int_rel.r_vaddr - input_section->vma, TRUE);
|
||
relocation = 0;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* This is a reloc against a section. */
|
||
relocation = (s->output_section->vma
|
||
+ s->output_offset
|
||
- s->vma);
|
||
|
||
/* A PC relative reloc is already correct in the object
|
||
file. Make it look like a pcrel_offset relocation by
|
||
adding in the start address. */
|
||
if (howto->pc_relative)
|
||
relocation += int_rel.r_vaddr;
|
||
}
|
||
|
||
if (int_rel.r_type != MIPS_R_REFHI)
|
||
r = _bfd_final_link_relocate (howto,
|
||
input_bfd,
|
||
input_section,
|
||
contents,
|
||
(int_rel.r_vaddr
|
||
- input_section->vma),
|
||
relocation,
|
||
addend);
|
||
else
|
||
{
|
||
mips_relocate_hi (&int_rel,
|
||
use_lo ? &lo_int_rel : NULL,
|
||
input_bfd, input_section, contents,
|
||
relocation);
|
||
r = bfd_reloc_ok;
|
||
}
|
||
}
|
||
|
||
/* MIPS_R_JMPADDR requires peculiar overflow detection. The
|
||
instruction provides a 28 bit address (the two lower bits are
|
||
implicit zeroes) which is combined with the upper four bits
|
||
of the instruction address. */
|
||
if (r == bfd_reloc_ok
|
||
&& int_rel.r_type == MIPS_R_JMPADDR
|
||
&& (((relocation
|
||
+ addend
|
||
+ (int_rel.r_extern ? 0 : s->vma))
|
||
& 0xf0000000)
|
||
!= ((input_section->output_section->vma
|
||
+ input_section->output_offset
|
||
+ (int_rel.r_vaddr - input_section->vma))
|
||
& 0xf0000000)))
|
||
r = bfd_reloc_overflow;
|
||
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
switch (r)
|
||
{
|
||
default:
|
||
case bfd_reloc_outofrange:
|
||
abort ();
|
||
case bfd_reloc_overflow:
|
||
{
|
||
const char *name;
|
||
|
||
if (int_rel.r_extern)
|
||
name = NULL;
|
||
else
|
||
name = bfd_section_name (input_bfd, s);
|
||
(*info->callbacks->reloc_overflow)
|
||
(info, (h ? &h->root : NULL), name, howto->name,
|
||
(bfd_vma) 0, input_bfd, input_section,
|
||
int_rel.r_vaddr - input_section->vma);
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* This is the ECOFF backend structure. The backend field of the
|
||
target vector points to this. */
|
||
|
||
static const struct ecoff_backend_data mips_ecoff_backend_data =
|
||
{
|
||
/* COFF backend structure. */
|
||
{
|
||
(void (*) (bfd *,void *,int,int,int,int,void *)) bfd_void, /* aux_in */
|
||
(void (*) (bfd *,void *,void *)) bfd_void, /* sym_in */
|
||
(void (*) (bfd *,void *,void *)) bfd_void, /* lineno_in */
|
||
(unsigned (*) (bfd *,void *,int,int,int,int,void *)) bfd_void,/*aux_out*/
|
||
(unsigned (*) (bfd *,void *,void *)) bfd_void, /* sym_out */
|
||
(unsigned (*) (bfd *,void *,void *)) bfd_void, /* lineno_out */
|
||
(unsigned (*) (bfd *,void *,void *)) bfd_void, /* reloc_out */
|
||
mips_ecoff_swap_filehdr_out, mips_ecoff_swap_aouthdr_out,
|
||
mips_ecoff_swap_scnhdr_out,
|
||
FILHSZ, AOUTSZ, SCNHSZ, 0, 0, 0, 0, FILNMLEN, TRUE,
|
||
ECOFF_NO_LONG_SECTION_NAMES, 4, FALSE, 2, 32768,
|
||
mips_ecoff_swap_filehdr_in, mips_ecoff_swap_aouthdr_in,
|
||
mips_ecoff_swap_scnhdr_in, NULL,
|
||
mips_ecoff_bad_format_hook, _bfd_ecoff_set_arch_mach_hook,
|
||
_bfd_ecoff_mkobject_hook, _bfd_ecoff_styp_to_sec_flags,
|
||
_bfd_ecoff_set_alignment_hook, _bfd_ecoff_slurp_symbol_table,
|
||
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
|
||
NULL, NULL, NULL
|
||
},
|
||
/* Supported architecture. */
|
||
bfd_arch_mips,
|
||
/* Initial portion of armap string. */
|
||
"__________",
|
||
/* The page boundary used to align sections in a demand-paged
|
||
executable file. E.g., 0x1000. */
|
||
0x1000,
|
||
/* 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. */
|
||
FALSE,
|
||
/* Bitsize of constructor entries. */
|
||
32,
|
||
/* Reloc to use for constructor entries. */
|
||
&mips_howto_table[MIPS_R_REFWORD],
|
||
{
|
||
/* Symbol table magic number. */
|
||
magicSym,
|
||
/* Alignment of debugging information. E.g., 4. */
|
||
4,
|
||
/* 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. */
|
||
mips_ecoff_swap_reloc_in,
|
||
mips_ecoff_swap_reloc_out,
|
||
/* Backend reloc tweaking. */
|
||
mips_adjust_reloc_in,
|
||
mips_adjust_reloc_out,
|
||
/* Relocate section contents while linking. */
|
||
mips_relocate_section,
|
||
/* Do final adjustments to filehdr and aouthdr. */
|
||
NULL,
|
||
/* Read an element from an archive at a given file position. */
|
||
_bfd_get_elt_at_filepos
|
||
};
|
||
|
||
/* Looking up a reloc type is MIPS specific. */
|
||
#define _bfd_ecoff_bfd_reloc_type_lookup mips_bfd_reloc_type_lookup
|
||
#define _bfd_ecoff_bfd_reloc_name_lookup mips_bfd_reloc_name_lookup
|
||
|
||
/* Getting relocated section contents is generic. */
|
||
#define _bfd_ecoff_bfd_get_relocated_section_contents \
|
||
bfd_generic_get_relocated_section_contents
|
||
|
||
/* Handling file windows is generic. */
|
||
#define _bfd_ecoff_get_section_contents_in_window \
|
||
_bfd_generic_get_section_contents_in_window
|
||
|
||
/* Relaxing sections is MIPS specific. */
|
||
#define _bfd_ecoff_bfd_relax_section bfd_generic_relax_section
|
||
|
||
/* GC of sections is not done. */
|
||
#define _bfd_ecoff_bfd_gc_sections bfd_generic_gc_sections
|
||
|
||
/* Input section flags is not implemented. */
|
||
#define _bfd_ecoff_bfd_lookup_section_flags bfd_generic_lookup_section_flags
|
||
|
||
/* Merging of sections is not done. */
|
||
#define _bfd_ecoff_bfd_merge_sections bfd_generic_merge_sections
|
||
|
||
#define _bfd_ecoff_bfd_is_group_section bfd_generic_is_group_section
|
||
#define _bfd_ecoff_bfd_discard_group bfd_generic_discard_group
|
||
#define _bfd_ecoff_section_already_linked \
|
||
_bfd_coff_section_already_linked
|
||
#define _bfd_ecoff_bfd_define_common_symbol bfd_generic_define_common_symbol
|
||
#define _bfd_ecoff_bfd_define_start_stop bfd_generic_define_start_stop
|
||
#define _bfd_ecoff_set_reloc _bfd_generic_set_reloc
|
||
|
||
extern const bfd_target mips_ecoff_be_vec;
|
||
|
||
const bfd_target mips_ecoff_le_vec =
|
||
{
|
||
"ecoff-littlemips", /* name */
|
||
bfd_target_ecoff_flavour,
|
||
BFD_ENDIAN_LITTLE, /* data byte order is little */
|
||
BFD_ENDIAN_LITTLE, /* header byte order is little */
|
||
|
||
(HAS_RELOC | EXEC_P | /* object flags */
|
||
HAS_LINENO | HAS_DEBUG |
|
||
HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
|
||
|
||
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
|
||
0, /* leading underscore */
|
||
' ', /* ar_pad_char */
|
||
15, /* ar_max_namelen */
|
||
0, /* match priority. */
|
||
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, coff_object_p, /* bfd_check_format */
|
||
bfd_generic_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),
|
||
|
||
& mips_ecoff_be_vec,
|
||
|
||
& mips_ecoff_backend_data
|
||
};
|
||
|
||
const bfd_target mips_ecoff_be_vec =
|
||
{
|
||
"ecoff-bigmips", /* name */
|
||
bfd_target_ecoff_flavour,
|
||
BFD_ENDIAN_BIG, /* data byte order is big */
|
||
BFD_ENDIAN_BIG, /* header byte order is big */
|
||
|
||
(HAS_RELOC | EXEC_P | /* object flags */
|
||
HAS_LINENO | HAS_DEBUG |
|
||
HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
|
||
|
||
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
|
||
0, /* leading underscore */
|
||
' ', /* ar_pad_char */
|
||
15, /* ar_max_namelen */
|
||
0, /* match priority. */
|
||
bfd_getb64, bfd_getb_signed_64, bfd_putb64,
|
||
bfd_getb32, bfd_getb_signed_32, bfd_putb32,
|
||
bfd_getb16, bfd_getb_signed_16, bfd_putb16,
|
||
bfd_getb64, bfd_getb_signed_64, bfd_putb64,
|
||
bfd_getb32, bfd_getb_signed_32, bfd_putb32,
|
||
bfd_getb16, bfd_getb_signed_16, bfd_putb16,
|
||
{_bfd_dummy_target, coff_object_p, /* bfd_check_format */
|
||
bfd_generic_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),
|
||
|
||
& mips_ecoff_le_vec,
|
||
|
||
& mips_ecoff_backend_data
|
||
};
|
||
|
||
const bfd_target mips_ecoff_bele_vec =
|
||
{
|
||
"ecoff-biglittlemips", /* name */
|
||
bfd_target_ecoff_flavour,
|
||
BFD_ENDIAN_LITTLE, /* data byte order is little */
|
||
BFD_ENDIAN_BIG, /* header byte order is big */
|
||
|
||
(HAS_RELOC | EXEC_P | /* object flags */
|
||
HAS_LINENO | HAS_DEBUG |
|
||
HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
|
||
|
||
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_CODE | SEC_DATA),
|
||
0, /* leading underscore */
|
||
' ', /* ar_pad_char */
|
||
15, /* ar_max_namelen */
|
||
0, /* match priority. */
|
||
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_getb64, bfd_getb_signed_64, bfd_putb64,
|
||
bfd_getb32, bfd_getb_signed_32, bfd_putb32,
|
||
bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
|
||
|
||
{_bfd_dummy_target, coff_object_p, /* bfd_check_format */
|
||
bfd_generic_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),
|
||
|
||
NULL,
|
||
|
||
& mips_ecoff_backend_data
|
||
};
|