219 lines
7.2 KiB
C
219 lines
7.2 KiB
C
/* RISC-V-specific support for 64-bit ELF
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Copyright 2011-2014 Free Software Foundation, Inc.
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Contributed by Andrew Waterman (waterman@cs.berkeley.edu) at UC Berkeley.
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Based on MIPS target.
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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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/* This file supports the 64-bit RISC-V ELF ABI. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "libbfd.h"
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#include "aout/ar.h"
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#include "bfdlink.h"
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#include "genlink.h"
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#include "elf-bfd.h"
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#include "elfxx-riscv.h"
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#include "elf/riscv.h"
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#include "opcode/riscv.h"
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static bfd_boolean riscv_elf64_object_p
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(bfd *);
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static bfd_boolean elf64_riscv_grok_prstatus
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(bfd *, Elf_Internal_Note *);
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static bfd_boolean elf64_riscv_grok_psinfo
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(bfd *, Elf_Internal_Note *);
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/* The number of local .got entries we reserve. */
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#define RISCV_RESERVED_GOTNO (2)
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/* Set the right machine number for a RISC-V ELF file. */
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static bfd_boolean
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riscv_elf64_object_p (bfd *abfd)
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{
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bfd_default_set_arch_mach (abfd, bfd_arch_riscv, bfd_mach_riscv64);
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return TRUE;
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}
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/* Support for core dump NOTE sections. */
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static bfd_boolean
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elf64_riscv_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
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{
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int offset;
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unsigned int size;
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switch (note->descsz)
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{
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default:
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return FALSE;
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case 480: /* Linux/RISC-V - RV64 kernel */
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/* pr_cursig */
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elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
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/* pr_pid */
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elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 32);
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/* pr_reg */
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offset = 112;
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size = 360;
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break;
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}
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/* Make a ".reg/999" section. */
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return _bfd_elfcore_make_pseudosection (abfd, ".reg",
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size, note->descpos + offset);
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}
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static bfd_boolean
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elf64_riscv_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
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{
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switch (note->descsz)
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{
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default:
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return FALSE;
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case 136: /* Linux/RISC-V - 64-bit kernel elf_prpsinfo */
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elf_tdata (abfd)->core_program
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= _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
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elf_tdata (abfd)->core_command
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= _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
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}
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/* Note that for some reason, a spurious space is tacked
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onto the end of the args in some (at least one anyway)
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implementations, so strip it off if it exists. */
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{
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char *command = elf_tdata (abfd)->core_command;
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int n = strlen (command);
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if (0 < n && command[n - 1] == ' ')
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command[n - 1] = '\0';
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}
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return TRUE;
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}
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#define ELF_ARCH bfd_arch_riscv
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#define ELF_TARGET_ID RISCV_ELF_DATA
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#define ELF_MACHINE_CODE EM_RISCV
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#define elf_backend_collect TRUE
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#define elf_backend_type_change_ok TRUE
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#define elf_backend_can_gc_sections TRUE
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#define elf_info_to_howto riscv_elf_info_to_howto_rela
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#define elf_backend_object_p riscv_elf64_object_p
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#define elf_backend_symbol_processing _bfd_riscv_elf_symbol_processing
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#define elf_backend_create_dynamic_sections \
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_bfd_riscv_elf_create_dynamic_sections
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#define elf_backend_check_relocs _bfd_riscv_elf_check_relocs
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#define elf_backend_merge_symbol_attribute \
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_bfd_riscv_elf_merge_symbol_attribute
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#define elf_backend_get_target_dtag _bfd_riscv_elf_get_target_dtag
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#define elf_backend_adjust_dynamic_symbol \
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_bfd_riscv_elf_adjust_dynamic_symbol
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#define elf_backend_always_size_sections \
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_bfd_riscv_elf_always_size_sections
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#define elf_backend_size_dynamic_sections \
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_bfd_riscv_elf_size_dynamic_sections
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#define elf_backend_init_index_section _bfd_elf_init_1_index_section
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#define elf_backend_relocate_section _bfd_riscv_elf_relocate_section
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#define elf_backend_finish_dynamic_symbol \
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_bfd_riscv_elf_finish_dynamic_symbol
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#define elf_backend_finish_dynamic_sections \
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_bfd_riscv_elf_finish_dynamic_sections
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#define elf_backend_additional_program_headers \
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_bfd_riscv_elf_additional_program_headers
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#define elf_backend_modify_segment_map _bfd_riscv_elf_modify_segment_map
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#define elf_backend_copy_indirect_symbol \
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_bfd_riscv_elf_copy_indirect_symbol
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#define elf_backend_ignore_discarded_relocs \
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_bfd_riscv_elf_ignore_discarded_relocs
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#define elf_backend_grok_prstatus elf64_riscv_grok_prstatus
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#define elf_backend_grok_psinfo elf64_riscv_grok_psinfo
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#define elf_backend_got_header_size (4 * RISCV_RESERVED_GOTNO)
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/* RISC-V ELF64 can use a mixture of REL and RELA, but some Relocations
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work better/work only in RELA, so we default to this. */
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#define elf_backend_may_use_rel_p 1
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#define elf_backend_may_use_rela_p 1
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#define elf_backend_default_use_rela_p 1
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#define elf_backend_rela_plts_and_copies_p 0
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#define elf_backend_plt_readonly 1
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#define elf_backend_plt_sym_val _bfd_riscv_elf_plt_sym_val
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#define elf_backend_sign_extend_vma TRUE
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#define elf_backend_write_section _bfd_riscv_elf_write_section
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#define bfd_elf64_new_section_hook _bfd_riscv_elf_new_section_hook
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#define bfd_elf64_bfd_get_relocated_section_contents \
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bfd_generic_get_relocated_section_contents
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#define bfd_elf64_bfd_link_hash_table_create \
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_bfd_riscv_elf_link_hash_table_create
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#define bfd_elf64_bfd_final_link _bfd_riscv_elf_final_link
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#define bfd_elf64_bfd_merge_private_bfd_data \
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_bfd_riscv_elf_merge_private_bfd_data
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#define bfd_elf64_bfd_print_private_bfd_data \
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_bfd_riscv_elf_print_private_bfd_data
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#define bfd_elf64_bfd_relax_section _bfd_riscv_relax_section
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/* RISC-V ELF64 archive functions. */
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#define bfd_elf64_archive_functions
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extern bfd_boolean bfd_elf64_archive_slurp_armap
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(bfd *);
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extern bfd_boolean bfd_elf64_archive_write_armap
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(bfd *, unsigned int, struct orl *, unsigned int, int);
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#define bfd_elf64_archive_slurp_extended_name_table \
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_bfd_archive_coff_slurp_extended_name_table
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#define bfd_elf64_archive_construct_extended_name_table \
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_bfd_archive_coff_construct_extended_name_table
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#define bfd_elf64_archive_truncate_arname \
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_bfd_archive_coff_truncate_arname
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#define bfd_elf64_archive_read_ar_hdr _bfd_archive_coff_read_ar_hdr
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#define bfd_elf64_archive_write_ar_hdr _bfd_archive_coff_write_ar_hdr
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#define bfd_elf64_archive_openr_next_archived_file \
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_bfd_archive_coff_openr_next_archived_file
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#define bfd_elf64_archive_get_elt_at_index \
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_bfd_archive_coff_get_elt_at_index
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#define bfd_elf64_archive_generic_stat_arch_elt \
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_bfd_archive_coff_generic_stat_arch_elt
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#define bfd_elf64_archive_update_armap_timestamp \
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_bfd_archive_coff_update_armap_timestamp
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#define bfd_elf64_bfd_reloc_type_lookup \
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riscv_elf_bfd_reloc_type_lookup
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#define bfd_elf64_bfd_reloc_name_lookup \
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riscv_elf_bfd_reloc_name_lookup
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#define TARGET_LITTLE_SYM bfd_elf64_riscv_vec
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#define TARGET_LITTLE_NAME "elf64-littleriscv"
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#define ELF_MAXPAGESIZE 0x2000
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#define ELF_COMMONPAGESIZE 0x2000
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#include "elf64-target.h"
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