3734320dc0
Add a new option to get the linker to emit PLTs that use compact branches instead of delay slot branches. bfd/ * elfxx-mips.c (LA25_BC): New macro. (mips_elf_link_hash_table)<compact_branches>: New field. (STUB_JALRC): New macro. (mipsr6_o32_exec_plt0_entry_compact): New array. (mipsr6_n32_exec_plt0_entry_compact): Likewise. (mipsr6_n64_exec_plt0_entry_compact): Likewise. (mipsr6_exec_plt_entry_compact): Likewise. (mips_elf_create_la25_stub): Use BC instead of J for stubs when compact_branches is true. (_bfd_mips_elf_finish_dynamic_symbol): Choose the compact PLT for MIPSR6 with compact_branches. Do not reorder the compact branches PLT. Switch the lazy stub for MIPSR6 with compact_branches to use JALRC. (mips_finish_exec_plt): Choose the compact PLT0 for MIPSR6 when compact_branches is true. (_bfd_mips_elf_compact_branches): New function. * elfxx-mips.h (_bfd_mips_elf_compact_branches): New prototype. ld/ * emultempl/mipself.em (compact_branches): New static variable. (mips_create_output_section_statements): Call _bfd_mips_elf_compact_branches. (PARSE_AND_LIST_PROLOGUE): Add OPTION_COMPACT_BRANCHES and OPTION_NO_COMPACT_BRANCHES. (PARSE_AND_LIST_LONGOPTS): Add compact-branches, no-compact-branches. (PARSE_AND_LIST_OPTIONS): Add --compact-branches, --no-compact-branches. (PARSE_AND_LIST_ARGS_CASES): Handle the above. * ld.texinfo: Document --compact-branches, --no-compact-branches. * testsuite/ld-mips-elf/pic-and-nonpic-1-r6.dd: New test. * testsuite/ld-mips-elf/pic-and-nonpic-1-r6.nd: New test. * testsuite/ld-mips-elf/pic-and-nonpic-3a-r6.dd: New test. * testsuite/ld-mips-elf/pic-and-nonpic-3a-r6.gd: New test. * testsuite/ld-mips-elf/pic-and-nonpic-1a-r6.s: New test source. * testsuite/ld-mips-elf/pic-and-nonpic-3a-r6.s: New test source. * testsuite/ld-mips-elf/mips-elf.exp: Run the new tests.
200 lines
8.7 KiB
C
200 lines
8.7 KiB
C
/* MIPS ELF specific backend routines.
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Copyright (C) 2002-2019 Free Software Foundation, Inc.
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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 "elf/common.h"
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#include "elf/internal.h"
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#include "elf/mips.h"
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extern bfd_boolean _bfd_mips_elf_mkobject
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(bfd *);
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extern bfd_boolean _bfd_mips_elf_new_section_hook
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(bfd *, asection *);
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extern void _bfd_mips_elf_symbol_processing
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(bfd *, asymbol *);
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extern unsigned int _bfd_mips_elf_eh_frame_address_size
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(bfd *, const asection *);
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extern bfd_boolean _bfd_mips_elf_name_local_section_symbols
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(bfd *);
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extern bfd_boolean _bfd_mips_elf_section_processing
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(bfd *, Elf_Internal_Shdr *);
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extern bfd_boolean _bfd_mips_elf_section_from_shdr
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(bfd *, Elf_Internal_Shdr *, const char *, int);
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extern bfd_boolean _bfd_mips_elf_fake_sections
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(bfd *, Elf_Internal_Shdr *, asection *);
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extern bfd_boolean _bfd_mips_elf_section_from_bfd_section
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(bfd *, asection *, int *);
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extern bfd_boolean _bfd_mips_elf_add_symbol_hook
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(bfd *, struct bfd_link_info *, Elf_Internal_Sym *,
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const char **, flagword *, asection **, bfd_vma *);
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extern int _bfd_mips_elf_link_output_symbol_hook
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(struct bfd_link_info *, const char *, Elf_Internal_Sym *,
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asection *, struct elf_link_hash_entry *);
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extern bfd_boolean _bfd_mips_elf_create_dynamic_sections
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(bfd *, struct bfd_link_info *);
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extern bfd_boolean _bfd_mips_elf_check_relocs
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(bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
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extern bfd_boolean _bfd_mips_elf_adjust_dynamic_symbol
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(struct bfd_link_info *, struct elf_link_hash_entry *);
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extern bfd_boolean _bfd_mips_elf_always_size_sections
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(bfd *, struct bfd_link_info *);
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extern bfd_boolean _bfd_mips_elf_size_dynamic_sections
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(bfd *, struct bfd_link_info *);
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extern bfd_boolean _bfd_mips_elf_relocate_section
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(bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
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Elf_Internal_Rela *, Elf_Internal_Sym *, asection **);
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extern bfd_boolean _bfd_mips_elf_finish_dynamic_symbol
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(bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
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Elf_Internal_Sym *);
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extern bfd_boolean _bfd_mips_vxworks_finish_dynamic_symbol
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(bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
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Elf_Internal_Sym *);
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extern bfd_boolean _bfd_mips_elf_finish_dynamic_sections
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(bfd *, struct bfd_link_info *);
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extern bfd_boolean _bfd_mips_elf_sort_relocs_p
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(asection *);
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extern void _bfd_mips_elf_final_write_processing
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(bfd *, bfd_boolean);
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extern int _bfd_mips_elf_additional_program_headers
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(bfd *, struct bfd_link_info *);
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extern bfd_boolean _bfd_mips_elf_modify_segment_map
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(bfd *, struct bfd_link_info *);
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extern asection * _bfd_mips_elf_gc_mark_hook
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(asection *, struct bfd_link_info *, Elf_Internal_Rela *,
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struct elf_link_hash_entry *, Elf_Internal_Sym *);
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extern void _bfd_mips_elf_copy_indirect_symbol
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(struct bfd_link_info *, struct elf_link_hash_entry *,
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struct elf_link_hash_entry *);
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extern void _bfd_mips_elf_hide_symbol
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(struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
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extern bfd_boolean _bfd_mips_elf_ignore_discarded_relocs
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(asection *);
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extern bfd_boolean _bfd_mips_elf_is_target_special_symbol
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(bfd *abfd, asymbol *sym);
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extern bfd_boolean _bfd_mips_elf_find_nearest_line
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(bfd *, asymbol **, asection *, bfd_vma,
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const char **, const char **, unsigned int *, unsigned int *);
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extern bfd_boolean _bfd_mips_elf_find_inliner_info
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(bfd *, const char **, const char **, unsigned int *);
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extern bfd_boolean _bfd_mips_elf_set_section_contents
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(bfd *, asection *, const void *, file_ptr, bfd_size_type);
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extern bfd_byte *_bfd_elf_mips_get_relocated_section_contents
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(bfd *, struct bfd_link_info *, struct bfd_link_order *,
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bfd_byte *, bfd_boolean, asymbol **);
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extern bfd_boolean _bfd_mips_elf_relax_section
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(bfd *abfd, asection *sec, struct bfd_link_info *link_info,
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bfd_boolean *again);
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extern struct bfd_link_hash_table *_bfd_mips_elf_link_hash_table_create
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(bfd *);
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extern struct bfd_link_hash_table *_bfd_mips_vxworks_link_hash_table_create
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(bfd *);
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extern bfd_boolean _bfd_mips_elf_final_link
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(bfd *, struct bfd_link_info *);
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extern bfd_boolean _bfd_mips_elf_merge_private_bfd_data
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(bfd *, struct bfd_link_info *);
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extern bfd_boolean _bfd_mips_elf_set_private_flags
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(bfd *, flagword);
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extern const char * _bfd_mips_fp_abi_string
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(int);
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extern bfd_boolean _bfd_mips_elf_print_private_bfd_data
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(bfd *, void *);
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extern bfd_boolean _bfd_mips_elf_discard_info
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(bfd *, struct elf_reloc_cookie *, struct bfd_link_info *);
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extern bfd_boolean _bfd_mips_elf_write_section
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(bfd *, struct bfd_link_info *, asection *, bfd_byte *);
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extern bfd_boolean _bfd_mips_elf_read_ecoff_info
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(bfd *, asection *, struct ecoff_debug_info *);
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extern void _bfd_mips_elf_reloc_unshuffle
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(bfd *, int, bfd_boolean, bfd_byte *);
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extern void _bfd_mips_elf_reloc_shuffle
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(bfd *, int, bfd_boolean, bfd_byte *);
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extern bfd_reloc_status_type _bfd_mips_elf_gprel16_with_gp
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(bfd *, asymbol *, arelent *, asection *, bfd_boolean, void *, bfd_vma);
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extern bfd_reloc_status_type _bfd_mips_elf32_gprel16_reloc
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(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
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extern bfd_reloc_status_type _bfd_mips_elf_hi16_reloc
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(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
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extern bfd_reloc_status_type _bfd_mips_elf_got16_reloc
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(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
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extern bfd_reloc_status_type _bfd_mips_elf_lo16_reloc
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(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
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extern bfd_reloc_status_type _bfd_mips_elf_generic_reloc
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(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
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extern unsigned long _bfd_elf_mips_mach
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(flagword);
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extern bfd_vma _bfd_mips_elf_sign_extend
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(bfd_vma, int);
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extern void _bfd_mips_elf_merge_symbol_attribute
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(struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean, bfd_boolean);
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extern char *_bfd_mips_elf_get_target_dtag (bfd_vma);
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extern bfd_boolean _bfd_mips_elf_ignore_undef_symbol
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(struct elf_link_hash_entry *);
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extern void _bfd_mips_elf_use_plts_and_copy_relocs
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(struct bfd_link_info *);
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extern void _bfd_mips_elf_linker_flags
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(struct bfd_link_info *, bfd_boolean, bfd_boolean, bfd_boolean);
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extern void _bfd_mips_elf_compact_branches
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(struct bfd_link_info *, bfd_boolean);
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extern bfd_boolean _bfd_mips_elf_init_stubs
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(struct bfd_link_info *,
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asection *(*) (const char *, asection *, asection *));
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extern bfd_vma _bfd_mips_elf_plt_sym_val
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(bfd_vma, const asection *, const arelent *rel);
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extern long _bfd_mips_elf_get_synthetic_symtab
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(bfd *, long, asymbol **, long, asymbol **, asymbol **);
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extern bfd_boolean _bfd_mips_elf_gc_mark_extra_sections
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(struct bfd_link_info *, elf_gc_mark_hook_fn);
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extern void _bfd_mips_post_process_headers
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(bfd *abfd, struct bfd_link_info *link_info);
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extern const struct bfd_elf_special_section _bfd_mips_elf_special_sections [];
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extern bfd_boolean _bfd_mips_elf_common_definition (Elf_Internal_Sym *);
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extern int _bfd_mips_elf_compact_eh_encoding (struct bfd_link_info *);
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extern int _bfd_mips_elf_cant_unwind_opcode (struct bfd_link_info *);
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static inline bfd_boolean
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gprel16_reloc_p (unsigned int r_type)
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{
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return (r_type == R_MIPS_GPREL16
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|| r_type == R_MIPS16_GPREL
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|| r_type == R_MICROMIPS_GPREL16
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|| r_type == R_MICROMIPS_GPREL7_S2);
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}
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static inline bfd_boolean
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literal_reloc_p (int r_type)
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{
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return r_type == R_MIPS_LITERAL || r_type == R_MICROMIPS_LITERAL;
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}
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#define elf_backend_common_definition _bfd_mips_elf_common_definition
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#define elf_backend_name_local_section_symbols \
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_bfd_mips_elf_name_local_section_symbols
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#define elf_backend_special_sections _bfd_mips_elf_special_sections
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#define elf_backend_eh_frame_address_size _bfd_mips_elf_eh_frame_address_size
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#define elf_backend_merge_symbol_attribute _bfd_mips_elf_merge_symbol_attribute
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#define elf_backend_ignore_undef_symbol _bfd_mips_elf_ignore_undef_symbol
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#define elf_backend_post_process_headers _bfd_mips_post_process_headers
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#define elf_backend_compact_eh_encoding _bfd_mips_elf_compact_eh_encoding
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#define elf_backend_cant_unwind_opcode _bfd_mips_elf_cant_unwind_opcode
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#define elf_backend_always_renumber_dynsyms TRUE
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