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c799eddb35
static variables like mips_hi16_list are nasty for applications using bfd. It is possible when opening and closing bfds with mis-matched hi/lo relocs to leave a stale section pointer on the list. That can cause a segfault if multiple bfds are being processed. Tidying the list when closing is sufficient to stop this happening (and fixes small memory leaks). This patch goes further and moves mips_hi16_list to where it belongs in the bfd tdata. * elf32-mips.c (bfd_elf32_close_and_cleanup(: Define. * elf64-mips.c (bfd_elf64_close_and_cleanup): Define. * elfn32-mips.c (bfd_elf32_close_and_cleanup(: Define. * elfxx-mips.c (struct mips_hi16): Move earlier. (mips_hi16_list): Move to.. (struct mips_elf_obj_tdata): ..here. (_bfd_mips_elf_close_and_cleanup): New function. (_bfd_mips_elf_hi16_reloc, _bfd_mips_elf_lo16_reloc), (_bfd_elf_mips_get_relocated_section_contents): Adjust uses of mips_hi16_list. * elfxx-mips.h (_bfd_mips_elf_close_and_cleanup): Declare.
222 lines
9.0 KiB
C
222 lines
9.0 KiB
C
/* MIPS ELF specific backend routines.
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Copyright (C) 2002-2022 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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enum reloc_check
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{
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check_std,
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check_inplace,
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check_shuffle
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};
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extern bool _bfd_mips_elf_mkobject
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(bfd *);
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extern bool _bfd_mips_elf_close_and_cleanup
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(bfd *);
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extern bool _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 bool _bfd_mips_elf_name_local_section_symbols
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(bfd *);
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extern bool _bfd_mips_elf_section_processing
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(bfd *, Elf_Internal_Shdr *);
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extern bool _bfd_mips_elf_section_from_shdr
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(bfd *, Elf_Internal_Shdr *, const char *, int);
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extern bool _bfd_mips_elf_fake_sections
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(bfd *, Elf_Internal_Shdr *, asection *);
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extern bool _bfd_mips_elf_section_from_bfd_section
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(bfd *, asection *, int *);
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extern bool _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 bool _bfd_mips_elf_create_dynamic_sections
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(bfd *, struct bfd_link_info *);
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extern bool _bfd_mips_elf_check_relocs
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(bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
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extern bool _bfd_mips_elf_adjust_dynamic_symbol
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(struct bfd_link_info *, struct elf_link_hash_entry *);
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extern bool _bfd_mips_elf_always_size_sections
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(bfd *, struct bfd_link_info *);
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extern bool _bfd_mips_elf_size_dynamic_sections
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(bfd *, struct bfd_link_info *);
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extern int _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 bool _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 bool _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 bool _bfd_mips_elf_finish_dynamic_sections
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(bfd *, struct bfd_link_info *);
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extern bool _bfd_mips_elf_sort_relocs_p
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(asection *);
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extern void _bfd_mips_final_write_processing
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(bfd *);
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extern bool _bfd_mips_elf_final_write_processing
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(bfd *);
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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 bool _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 *, bool);
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extern bool _bfd_mips_elf_ignore_discarded_relocs
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(asection *);
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extern bool _bfd_mips_elf_is_target_special_symbol
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(bfd *abfd, asymbol *sym);
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extern bool _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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#define _bfd_mips_elf_find_nearest_line_with_alt \
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_bfd_nosymbols_find_nearest_line_with_alt
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extern bool _bfd_mips_elf_find_inliner_info
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(bfd *, const char **, const char **, unsigned int *);
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extern bool _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 *, bool, asymbol **);
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extern bool _bfd_mips_elf_relax_section
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(bfd *abfd, asection *sec, struct bfd_link_info *link_info,
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bool *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 bool _bfd_mips_elf_final_link
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(bfd *, struct bfd_link_info *);
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extern bool _bfd_mips_elf_merge_private_bfd_data
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(bfd *, struct bfd_link_info *);
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extern bool _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 bool _bfd_mips_elf_print_private_bfd_data
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(bfd *, void *);
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extern bool _bfd_mips_elf_discard_info
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(bfd *, struct elf_reloc_cookie *, struct bfd_link_info *);
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extern bool _bfd_mips_elf_write_section
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(bfd *, struct bfd_link_info *, asection *, bfd_byte *);
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extern bool _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, bool, bfd_byte *);
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extern void _bfd_mips_elf_reloc_shuffle
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(bfd *, int, bool, bfd_byte *);
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extern bool _bfd_mips_reloc_offset_in_range
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(bfd *, asection *, arelent *, enum reloc_check);
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extern bfd_reloc_status_type _bfd_mips_elf_gprel16_with_gp
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(bfd *, asymbol *, arelent *, asection *, bool, 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 *, unsigned int, bool, bool);
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extern char *_bfd_mips_elf_get_target_dtag (bfd_vma);
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extern bool _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 *, bool, bool, bool);
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extern void _bfd_mips_elf_compact_branches
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(struct bfd_link_info *, bool);
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extern bool _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 bool _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 bool _bfd_mips_init_file_header
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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 bool _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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extern void _bfd_mips_elf_record_xhash_symbol
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(struct elf_link_hash_entry *h, bfd_vma xlat_loc);
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/* MIPS ABI flags data access. For the disassembler. */
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extern struct elf_internal_abiflags_v0 *bfd_mips_elf_get_abiflags (bfd *);
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static inline bool
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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 bool
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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_init_file_header _bfd_mips_init_file_header
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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_record_xhash_symbol _bfd_mips_elf_record_xhash_symbol
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#define elf_backend_always_renumber_dynsyms true
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