159 lines
5.4 KiB
C
159 lines
5.4 KiB
C
/* AArch64-specific backend routines.
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Copyright (C) 2009-2020 Free Software Foundation, Inc.
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Contributed by ARM Ltd.
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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; see the file COPYING3. If not,
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see <http://www.gnu.org/licenses/>. */
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extern void bfd_elf64_aarch64_init_maps
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(bfd *);
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extern void bfd_elf32_aarch64_init_maps
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(bfd *);
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/* Types of PLTs based on the level of security. This would be a
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bit-mask to denote which of the combinations of security features
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are enabled:
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- No security feature PLTs
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- PLTs with BTI instruction
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- PLTs with PAC instruction
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*/
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typedef enum
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{
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PLT_NORMAL = 0x0, /* Normal plts. */
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PLT_BTI = 0x1, /* plts with bti. */
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PLT_PAC = 0x2, /* plts with pointer authentication. */
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PLT_BTI_PAC = PLT_BTI | PLT_PAC
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} aarch64_plt_type;
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/* To indicate if BTI is enabled with/without warning. */
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typedef enum
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{
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BTI_NONE = 0, /* BTI is not enabled. */
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BTI_WARN = 1, /* BTI is enabled with -z force-bti. */
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} aarch64_enable_bti_type;
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/* A structure to encompass all information coming from BTI or PAC
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related command line options. This involves the "PLT_TYPE" to determine
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which version of PLTs to pick and "BTI_TYPE" to determine if
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BTI should be turned on with any warnings. */
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typedef struct
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{
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aarch64_plt_type plt_type;
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aarch64_enable_bti_type bti_type;
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} aarch64_bti_pac_info;
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/* An enum to define what kind of erratum fixes we should apply. This gives the
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user a bit more control over the sequences we generate. */
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typedef enum
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{
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ERRAT_NONE = (1 << 0), /* No erratum workarounds allowed. */
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ERRAT_ADR = (1 << 1), /* Erratum workarounds using ADR allowed. */
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ERRAT_ADRP = (1 << 2), /* Erratum workarounds using ADRP are allowed. */
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} erratum_84319_opts;
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extern void bfd_elf64_aarch64_set_options
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(bfd *, struct bfd_link_info *, int, int, int, int, erratum_84319_opts, int,
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aarch64_bti_pac_info);
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extern void bfd_elf32_aarch64_set_options
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(bfd *, struct bfd_link_info *, int, int, int, int, erratum_84319_opts, int,
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aarch64_bti_pac_info);
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/* AArch64 stub generation support for ELF64. Called from the linker. */
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extern int elf64_aarch64_setup_section_lists
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(bfd *, struct bfd_link_info *);
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extern void elf64_aarch64_next_input_section
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(struct bfd_link_info *, struct bfd_section *);
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extern bfd_boolean elf64_aarch64_size_stubs
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(bfd *, bfd *, struct bfd_link_info *, bfd_signed_vma,
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struct bfd_section * (*) (const char *, struct bfd_section *),
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void (*) (void));
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extern bfd_boolean elf64_aarch64_build_stubs
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(struct bfd_link_info *);
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/* AArch64 stub generation support for ELF32. Called from the linker. */
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extern int elf32_aarch64_setup_section_lists
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(bfd *, struct bfd_link_info *);
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extern void elf32_aarch64_next_input_section
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(struct bfd_link_info *, struct bfd_section *);
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extern bfd_boolean elf32_aarch64_size_stubs
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(bfd *, bfd *, struct bfd_link_info *, bfd_signed_vma,
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struct bfd_section * (*) (const char *, struct bfd_section *),
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void (*) (void));
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extern bfd_boolean elf32_aarch64_build_stubs
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(struct bfd_link_info *);
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/* Take the PAGE component of an address or offset. */
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#define PG(x) ((x) & ~ (bfd_vma) 0xfff)
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#define PG_OFFSET(x) ((x) & (bfd_vma) 0xfff)
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#define AARCH64_ADR_OP 0x10000000
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#define AARCH64_ADRP_OP 0x90000000
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#define AARCH64_ADRP_OP_MASK 0x9F000000
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extern bfd_signed_vma
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_bfd_aarch64_sign_extend (bfd_vma, int);
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extern uint32_t
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_bfd_aarch64_decode_adrp_imm (uint32_t);
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extern uint32_t
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_bfd_aarch64_reencode_adr_imm (uint32_t, uint32_t);
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extern bfd_reloc_status_type
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_bfd_aarch64_elf_put_addend (bfd *, bfd_byte *, bfd_reloc_code_real_type,
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reloc_howto_type *, bfd_signed_vma);
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extern bfd_vma
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_bfd_aarch64_elf_resolve_relocation (bfd *, bfd_reloc_code_real_type, bfd_vma,
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bfd_vma, bfd_vma, bfd_boolean);
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extern bfd_boolean
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_bfd_aarch64_elf_grok_prstatus (bfd *, Elf_Internal_Note *);
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extern bfd_boolean
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_bfd_aarch64_elf_grok_psinfo (bfd *, Elf_Internal_Note *);
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extern char *
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_bfd_aarch64_elf_write_core_note (bfd *, char *, int *, int, ...);
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#define elf_backend_grok_prstatus _bfd_aarch64_elf_grok_prstatus
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#define elf_backend_grok_psinfo _bfd_aarch64_elf_grok_psinfo
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#define elf_backend_write_core_note _bfd_aarch64_elf_write_core_note
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extern bfd *
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_bfd_aarch64_elf_link_setup_gnu_properties (struct bfd_link_info *,
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uint32_t *);
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extern enum elf_property_kind
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_bfd_aarch64_elf_parse_gnu_properties (bfd *, unsigned int,
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bfd_byte *, unsigned int);
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extern bfd_boolean
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_bfd_aarch64_elf_merge_gnu_properties (struct bfd_link_info *, bfd *,
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elf_property *, elf_property *,
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uint32_t);
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extern void
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_bfd_aarch64_elf_link_fixup_gnu_properties (struct bfd_link_info *,
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elf_property_list **);
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#define elf_backend_parse_gnu_properties \
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_bfd_aarch64_elf_parse_gnu_properties
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#define elf_backend_fixup_gnu_properties \
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_bfd_aarch64_elf_link_fixup_gnu_properties
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