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/* Hitachi SH64-specific support for 32-bit ELF
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Copyright (C) 2000, 2001, 2002 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "../opcodes/sh64-opc.h"
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/* Add a suffix for datalabel indirection symbols. It must not match any
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other symbols; user symbols with or without version or other
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decoration. It must only be used internally and not emitted by any
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#define DATALABEL_SUFFIX " DL"
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/* Used to hold data for function called through bfd_map_over_sections. */
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struct sh64_find_section_vma_data
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static boolean sh64_elf_copy_private_data PARAMS ((bfd *, bfd *));
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static boolean sh64_elf_merge_private_data PARAMS ((bfd *, bfd *));
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static boolean sh64_elf_fake_sections PARAMS ((bfd *, Elf_Internal_Shdr *,
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static boolean sh64_elf_set_private_flags PARAMS ((bfd *, flagword));
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static boolean sh64_elf_set_mach_from_flags PARAMS ((bfd *));
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static boolean shmedia_prepare_reloc
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PARAMS ((struct bfd_link_info *, bfd *, asection *,
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bfd_byte *, const Elf_Internal_Rela *, bfd_vma *));
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static int sh64_elf_get_symbol_type PARAMS ((Elf_Internal_Sym *, int));
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static boolean sh64_elf_add_symbol_hook
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PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
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const char **, flagword *, asection **, bfd_vma *));
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static boolean sh64_elf_link_output_symbol_hook
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PARAMS ((bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *,
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static boolean sh64_backend_section_from_shdr
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PARAMS ((bfd *, Elf_Internal_Shdr *, const char *));
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static void sh64_elf_final_write_processing PARAMS ((bfd *, boolean));
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static boolean sh64_bfd_elf_copy_private_section_data
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PARAMS ((bfd *, asection *, bfd *, asection *));
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static void sh64_find_section_for_address PARAMS ((bfd *, asection *, PTR));
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/* Let elf32-sh.c handle the "bfd_" definitions, so we only have to
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intrude with an #ifndef around the function definition. */
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#define sh_elf_copy_private_data sh64_elf_copy_private_data
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#define sh_elf_merge_private_data sh64_elf_merge_private_data
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#define sh_elf_set_private_flags sh64_elf_set_private_flags
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/* Typo in elf32-sh.c (and unlinear name). */
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#define bfd_elf32_bfd_set_private_flags sh64_elf_set_private_flags
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#define sh_elf_set_mach_from_flags sh64_elf_set_mach_from_flags
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#define elf_backend_sign_extend_vma 1
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#define elf_backend_fake_sections sh64_elf_fake_sections
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#define elf_backend_get_symbol_type sh64_elf_get_symbol_type
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#define elf_backend_add_symbol_hook sh64_elf_add_symbol_hook
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#define elf_backend_link_output_symbol_hook \
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sh64_elf_link_output_symbol_hook
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#define elf_backend_final_write_processing sh64_elf_final_write_processing
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#define elf_backend_section_from_shdr sh64_backend_section_from_shdr
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/* For objcopy, we need to set up sh64_elf_section_data (asection *) from
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incoming section flags. This is otherwise done in sh64elf.em when
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linking or tc-sh64.c when assembling. */
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#define bfd_elf32_bfd_copy_private_section_data \
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sh64_bfd_elf_copy_private_section_data
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/* This COFF-only function (only compiled with COFF support, making
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ELF-only chains problematic) returns true early for SH4, so let's just
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define it true here. */
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#define _bfd_sh_align_load_span(a,b,c,d,e,f,g,h,i,j) true
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#define TARGET_BIG_SYM bfd_elf32_sh64_vec
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#define TARGET_BIG_NAME "elf32-sh64"
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#define TARGET_LITTLE_SYM bfd_elf32_sh64l_vec
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#define TARGET_LITTLE_NAME "elf32-sh64l"
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#define ELF_ARCH bfd_arch_sh
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#define ELF_MACHINE_CODE EM_SH
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#define ELF_MAXPAGESIZE 128
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#define elf_symbol_leading_char '_'
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#endif /* ELF_ARCH */
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#define GOT_BIAS (-((long)-32768))
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#define INCLUDE_SHMEDIA
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#include "elf32-sh.c"
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/* Set the SHF_SH5_ISA32 flag for ISA SHmedia code sections, and pass
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through SHT_SH5_CR_SORTED on a sorted .cranges section. */
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sh64_elf_fake_sections (output_bfd, elf_section_hdr, asect)
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bfd *output_bfd ATTRIBUTE_UNUSED;
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Elf_Internal_Shdr *elf_section_hdr;
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if (sh64_elf_section_data (asect) != NULL)
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elf_section_hdr->sh_flags
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|= sh64_elf_section_data (asect)->contents_flags;
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/* If this section has the SEC_SORT_ENTRIES flag set, it is a sorted
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.cranges section passing through objcopy. */
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if ((bfd_get_section_flags (output_bfd, asect) & SEC_SORT_ENTRIES) != 0
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&& strcmp (bfd_get_section_name (output_bfd, asect),
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SH64_CRANGES_SECTION_NAME) == 0)
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elf_section_hdr->sh_type = SHT_SH5_CR_SORTED;
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sh64_elf_set_mach_from_flags (abfd)
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flagword flags = elf_elfheader (abfd)->e_flags;
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switch (flags & EF_SH_MACH_MASK)
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/* These are fit to execute on SH5. Just one but keep the switch
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construct to make additions easy. */
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bfd_default_set_arch_mach (abfd, bfd_arch_sh, bfd_mach_sh5);
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bfd_set_error (bfd_error_wrong_format);
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/* We also need to set SEC_DEBUGGING on an incoming .cranges section.
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We could have used elf_backend_section_flags if it had given us the
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section name; the bfd_section member in the header argument is not
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set at the point of the call. FIXME: Find out whether that is by
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undocumented design or a bug. */
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cranges = bfd_get_section_by_name (abfd, SH64_CRANGES_SECTION_NAME);
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&& ! bfd_set_section_flags (abfd, cranges,
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bfd_get_section_flags (abfd, cranges)
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sh64_elf_copy_private_data (ibfd, obfd)
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if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
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|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
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BFD_ASSERT (!elf_flags_init (obfd)
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|| (elf_elfheader (obfd)->e_flags
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== elf_elfheader (ibfd)->e_flags));
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elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
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sh64_elf_merge_private_data (ibfd, obfd)
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flagword old_flags, new_flags;
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if (! _bfd_generic_verify_endian_match (ibfd, obfd))
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if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
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|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
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if (bfd_get_arch_size (ibfd) != bfd_get_arch_size (obfd))
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if (bfd_get_arch_size (ibfd) == 32
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&& bfd_get_arch_size (obfd) == 64)
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msg = _("%s: compiled as 32-bit object and %s is 64-bit");
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else if (bfd_get_arch_size (ibfd) == 64
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&& bfd_get_arch_size (obfd) == 32)
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msg = _("%s: compiled as 64-bit object and %s is 32-bit");
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msg = _("%s: object size does not match that of target %s");
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(*_bfd_error_handler) (msg, bfd_get_filename (ibfd),
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bfd_get_filename (obfd));
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bfd_set_error (bfd_error_wrong_format);
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old_flags = elf_elfheader (obfd)->e_flags;
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new_flags = elf_elfheader (ibfd)->e_flags;
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if (! elf_flags_init (obfd))
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/* This happens when ld starts out with a 'blank' output file. */
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elf_flags_init (obfd) = true;
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elf_elfheader (obfd)->e_flags = old_flags = new_flags;
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/* We don't allow linking in non-SH64 code. */
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else if ((new_flags & EF_SH_MACH_MASK) != EF_SH5)
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(*_bfd_error_handler)
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("%s: uses non-SH64 instructions while previous modules use SH64 instructions",
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bfd_get_filename (ibfd));
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bfd_set_error (bfd_error_bad_value);
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/* I can't think of anything sane other than old_flags being EF_SH5 and
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that we need to preserve that. */
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elf_elfheader (obfd)->e_flags = old_flags;
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return sh64_elf_set_mach_from_flags (obfd);
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/* Handle a SH64-specific section when reading an object file. This
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is called when elfcode.h finds a section with an unknown type.
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We only recognize SHT_SH5_CR_SORTED, on the .cranges section. */
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sh64_backend_section_from_shdr (abfd, hdr, name)
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Elf_Internal_Shdr *hdr;
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/* We do like MIPS with a bit switch for recognized types, and returning
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false for a recognized section type with an unexpected name. Right
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now we only have one recognized type, but that might change. */
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switch (hdr->sh_type)
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case SHT_SH5_CR_SORTED:
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if (strcmp (name, SH64_CRANGES_SECTION_NAME) != 0)
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/* We set the SEC_SORT_ENTRIES flag so it can be passed on to
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sh64_elf_fake_sections, keeping SHT_SH5_CR_SORTED if this object
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passes through objcopy. Perhaps it is brittle; the flag can
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suddenly be used by other BFD parts, but it seems not really used
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anywhere at the moment. */
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flags = SEC_DEBUGGING | SEC_SORT_ENTRIES;
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if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
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&& ! bfd_set_section_flags (abfd, hdr->bfd_section,
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bfd_get_section_flags (abfd,
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/* In contrast to sh64_backend_section_from_shdr, this is called for all
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sections, but only when copying sections, not when linking or
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assembling. We need to set up the sh64_elf_section_data (asection *)
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structure for the SH64 ELF section flags to be copied correctly. */
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sh64_bfd_elf_copy_private_section_data (ibfd, isec, obfd, osec)
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struct sh64_section_data *sh64_sec_data;
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if (ibfd->xvec->flavour != bfd_target_elf_flavour
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|| obfd->xvec->flavour != bfd_target_elf_flavour)
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if (! _bfd_elf_copy_private_section_data (ibfd, isec, obfd, osec))
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sh64_sec_data = sh64_elf_section_data (isec);
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if (sh64_sec_data == NULL)
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sh64_sec_data = bfd_zmalloc (sizeof (struct sh64_section_data));
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if (sh64_sec_data == NULL)
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sh64_sec_data->contents_flags
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= (elf_section_data (isec)->this_hdr.sh_flags
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& (SHF_SH5_ISA32 | SHF_SH5_ISA32_MIXED));
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sh64_elf_section_data (osec) = sh64_sec_data;
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/* Function to keep SH64 specific file flags. */
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sh64_elf_set_private_flags (abfd, flags)
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BFD_ASSERT (! elf_flags_init (abfd)
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|| elf_elfheader (abfd)->e_flags == flags);
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elf_elfheader (abfd)->e_flags = flags;
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elf_flags_init (abfd) = true;
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return sh64_elf_set_mach_from_flags (abfd);
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/* Called when writing out an object file to decide the type of a symbol. */
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sh64_elf_get_symbol_type (elf_sym, type)
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Elf_Internal_Sym * elf_sym;
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if (ELF_ST_TYPE (elf_sym->st_info) == STT_DATALABEL)
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return STT_DATALABEL;
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/* Hook called by the linker routine which adds symbols from an object
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file. We must make indirect symbols for undefined symbols marked with
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STT_DATALABEL, so relocations passing them will pick up that attribute
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and neutralize STO_SH5_ISA32 found on the symbol definition.
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There is a problem, though: We want to fill in the hash-table entry for
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this symbol and signal to the caller that no further processing is
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needed. But we don't have the index for this hash-table entry. We
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rely here on that the current entry is the first hash-entry with NULL,
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which seems brittle. Also, iterating over the hash-table to find that
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entry is a linear operation on the number of symbols in this input
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file, and this function should take constant time, so that's not good
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too. Only comfort is that DataLabel references should only be found in
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hand-written assembly code and thus be rare. FIXME: Talk maintainers
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into adding an option to elf_add_symbol_hook (preferably) for the index
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or the hash entry, alternatively adding the index to Elf_Internal_Sym
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sh64_elf_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
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struct bfd_link_info *info;
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const Elf_Internal_Sym *sym;
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flagword *flagsp ATTRIBUTE_UNUSED;
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/* We want to do this for relocatable as well as final linking. */
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if (ELF_ST_TYPE (sym->st_info) == STT_DATALABEL
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&& info->hash->creator->flavour == bfd_target_elf_flavour)
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struct elf_link_hash_entry *h;
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/* For relocateable links, we register the DataLabel sym in its own
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right, and tweak the name when it's output. Otherwise, we make
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an indirect symbol of it. */
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= info->relocateable || info->emitrelocations
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? BSF_GLOBAL : BSF_GLOBAL | BSF_INDIRECT;
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= bfd_malloc (strlen (*namep) + sizeof (DATALABEL_SUFFIX));
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struct elf_link_hash_entry ** sym_hash = elf_sym_hashes (abfd);
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BFD_ASSERT (sym_hash != NULL);
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/* Allocation may fail. */
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strcpy (dl_name, *namep);
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strcat (dl_name, DATALABEL_SUFFIX);
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h = (struct elf_link_hash_entry *)
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bfd_link_hash_lookup (info->hash, dl_name, false, false, false);
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/* No previous datalabel symbol. Make one. */
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if (! _bfd_generic_link_add_one_symbol (info, abfd, dl_name,
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get_elf_backend_data (abfd)->collect,
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(struct bfd_link_hash_entry **) &h))
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h->elf_link_hash_flags &=~ ELF_LINK_NON_ELF;
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h->type = STT_DATALABEL;
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/* If a new symbol was created, it holds the allocated name.
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Otherwise, we don't need it anymore and should deallocate it. */
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if (h->type != STT_DATALABEL
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|| ((info->relocateable || info->emitrelocations)
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&& h->root.type != bfd_link_hash_undefined)
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|| (! info->relocateable && !info->emitrelocations
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&& h->root.type != bfd_link_hash_indirect))
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/* Make sure we don't get confused on invalid input. */
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(*_bfd_error_handler)
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(_("%s: encountered datalabel symbol in input"),
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bfd_get_filename (abfd));
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bfd_set_error (bfd_error_bad_value);
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/* Now find the hash-table slot for this entry and fill it in. */
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while (*sym_hash != NULL)
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/* Signal to caller to skip this symbol - we've handled it. */
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/* This hook function is called before the linker writes out a global
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symbol. For relocatable links, DataLabel symbols will be present in
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linker output. We cut off the special suffix on those symbols, so the
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right name appears in the output.
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When linking and emitting relocations, there can appear global symbols
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that are not referenced by relocs, but rather only implicitly through
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DataLabel references, a relation that is not visible to the linker.
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Since no stripping of global symbols in done when doing such linking,
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we don't need to look up and make sure to emit the main symbol for each
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sh64_elf_link_output_symbol_hook (abfd, info, cname, sym, input_sec)
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bfd *abfd ATTRIBUTE_UNUSED;
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struct bfd_link_info *info;
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Elf_Internal_Sym *sym;
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asection *input_sec ATTRIBUTE_UNUSED;
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char *name = (char *) cname;
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if (info->relocateable || info->emitrelocations)
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if (ELF_ST_TYPE (sym->st_info) == STT_DATALABEL)
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name[strlen (name) - strlen (DATALABEL_SUFFIX)] = 0;
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/* Check a SH64-specific reloc and put the value to relocate to into
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RELOCATION, ready to pass to _bfd_final_link_relocate. Return FALSE if
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bad value, TRUE if ok. */
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shmedia_prepare_reloc (info, abfd, input_section,
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contents, rel, relocation)
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struct bfd_link_info *info;
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asection *input_section;
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const Elf_Internal_Rela *rel;
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bfd_vma disp, dropped;
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switch (ELF32_R_TYPE (rel->r_info))
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/* Check the lowest bit of the destination field. If it is 1, we
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check the ISA type of the destination (i.e. the low bit of the
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"relocation" value, and emit an error if the instruction does not
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match). If it is 0, we change a PTA to PTB. There should never
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be a PTB that should change to a PTA; that indicates a toolchain
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error; a mismatch with GAS. */
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bfd_vma insn = bfd_get_32 (abfd, contents + rel->r_offset);
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if (insn & (1 << 10))
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/* Check matching insn and ISA (address of target). */
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if ((insn & SHMEDIA_PTB_BIT) != 0
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&& ((*relocation + rel->r_addend) & 1) != 0)
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msg = _("PTB mismatch: a SHmedia address (bit 0 == 1)");
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else if ((insn & SHMEDIA_PTB_BIT) == 0
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&& ((*relocation + rel->r_addend) & 1) == 0)
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msg = _("PTA mismatch: a SHcompact address (bit 0 == 0)");
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&& ! ((*info->callbacks->reloc_dangerous)
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(info, msg, abfd, input_section,
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/* We shouldn't get here with a PTB insn and a R_SH_PT_16. It
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means GAS output does not match expectations; a PTA or PTB
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expressed as such (or a PT found at assembly to be PTB)
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would match the test above, and PT expansion with an
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unknown destination (or when relaxing) will get us here. */
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if ((insn & SHMEDIA_PTB_BIT) != 0)
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(*_bfd_error_handler)
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(_("%s: GAS error: unexpected PTB insn with R_SH_PT_16"),
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bfd_get_filename (input_section->owner));
549
/* Change the PTA to a PTB, if destination indicates so. */
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if (((*relocation + rel->r_addend) & 1) == 0)
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bfd_put_32 (abfd, insn | SHMEDIA_PTB_BIT,
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contents + rel->r_offset);
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case R_SH_SHMEDIA_CODE:
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case R_SH_IMM_LOW16_PCREL:
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case R_SH_IMM_MEDLOW16:
569
case R_SH_IMM_MEDLOW16_PCREL:
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case R_SH_IMM_MEDHI16:
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case R_SH_IMM_MEDHI16_PCREL:
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case R_SH_IMM_HI16_PCREL:
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disp = (*relocation & 0xf);
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switch (ELF32_R_TYPE (rel->r_info))
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case R_SH_DIR10SW: dropped = disp & 1; break;
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case R_SH_DIR10SL: dropped = disp & 3; break;
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case R_SH_DIR10SQ: dropped = disp & 7; break;
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(*_bfd_error_handler)
593
(_("%s: error: unaligned relocation type %d at %08x reloc %08x\n"),
594
bfd_get_filename (input_section->owner), ELF32_R_TYPE (rel->r_info),
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(unsigned)rel->r_offset, (unsigned)relocation);
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/* Helper function to locate the section holding a certain address. This
603
is called via bfd_map_over_sections. */
606
sh64_find_section_for_address (abfd, section, data)
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bfd *abfd ATTRIBUTE_UNUSED;
613
struct sh64_find_section_vma_data *fsec_datap
614
= (struct sh64_find_section_vma_data *) data;
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/* Return if already found. */
617
if (fsec_datap->section)
620
/* If this section isn't part of the addressable contents, skip it. */
621
if ((bfd_get_section_flags (abfd, section) & SEC_ALLOC) == 0)
624
vma = bfd_get_section_vma (abfd, section);
625
if (fsec_datap->addr < vma)
628
/* FIXME: section->reloc_done isn't set properly; a generic buglet
629
preventing us from using bfd_get_section_size_after_reloc. */
631
= section->_cooked_size ? section->_cooked_size : section->_raw_size;
633
if (fsec_datap->addr >= vma + size)
636
fsec_datap->section = section;
639
/* Make sure to write out the generated entries in the .cranges section
640
when doing partial linking, and set bit 0 on the entry address if it
641
points to SHmedia code and write sorted .cranges entries when writing
642
executables (final linking and objcopy). */
645
sh64_elf_final_write_processing (abfd, linker)
647
boolean linker ATTRIBUTE_UNUSED;
649
bfd_vma ld_generated_cranges_size;
651
= bfd_get_section_by_name (abfd, SH64_CRANGES_SECTION_NAME);
653
/* If no new .cranges were added, the generic ELF linker parts will
654
write it all out. If not, we need to write them out when doing
655
partial linking. For a final link, we will sort them and write them
656
all out further below. */
659
&& elf_elfheader (abfd)->e_type != ET_EXEC
660
&& (ld_generated_cranges_size
661
= sh64_elf_section_data (cranges)->cranges_growth) != 0)
663
bfd_vma incoming_cranges_size
664
= ((cranges->_cooked_size != 0
665
? cranges->_cooked_size : cranges->_raw_size)
666
- ld_generated_cranges_size);
668
if (! bfd_set_section_contents (abfd, cranges,
670
+ incoming_cranges_size,
671
cranges->output_offset
672
+ incoming_cranges_size,
673
ld_generated_cranges_size))
675
bfd_set_error (bfd_error_file_truncated);
676
(*_bfd_error_handler)
677
(_("%s: could not write out added .cranges entries"),
678
bfd_get_filename (abfd));
682
/* Only set entry address bit 0 and sort .cranges when linking to an
683
executable; never with objcopy or strip. */
684
if (linker && elf_elfheader (abfd)->e_type == ET_EXEC)
686
struct sh64_find_section_vma_data fsec_data;
687
sh64_elf_crange dummy;
689
/* For a final link, set the low bit of the entry address to
690
reflect whether or not it is a SHmedia address.
691
FIXME: Perhaps we shouldn't do this if the entry address was
692
supplied numerically, but we currently lack the infrastructure to
693
recognize that: The entry symbol, and info whether it is numeric
694
or a symbol name is kept private in the linker. */
695
fsec_data.addr = elf_elfheader (abfd)->e_entry;
696
fsec_data.section = NULL;
698
bfd_map_over_sections (abfd, sh64_find_section_for_address,
700
if (fsec_data.section
701
&& (sh64_get_contents_type (fsec_data.section,
702
elf_elfheader (abfd)->e_entry,
703
&dummy) == CRT_SH5_ISA32))
704
elf_elfheader (abfd)->e_entry |= 1;
706
/* If we have a .cranges section, sort the entries. */
709
bfd_size_type cranges_size
710
= (cranges->_cooked_size != 0
711
? cranges->_cooked_size : cranges->_raw_size);
713
/* We know we always have these in memory at this time. */
714
BFD_ASSERT (cranges->contents != NULL);
716
/* The .cranges may already have been sorted in the process of
717
finding out the ISA-type of the entry address. If not, we do
719
if (elf_section_data (cranges)->this_hdr.sh_type
720
!= SHT_SH5_CR_SORTED)
722
qsort (cranges->contents, cranges_size / SH64_CRANGE_SIZE,
724
bfd_big_endian (cranges->owner)
725
? _bfd_sh64_crange_qsort_cmpb
726
: _bfd_sh64_crange_qsort_cmpl);
727
elf_section_data (cranges)->this_hdr.sh_type
731
/* We need to write it out in whole as sorted. */
732
if (! bfd_set_section_contents (abfd, cranges,
734
cranges->output_offset,
737
bfd_set_error (bfd_error_file_truncated);
738
(*_bfd_error_handler)
739
(_("%s: could not write out sorted .cranges entries"),
740
bfd_get_filename (abfd));
added
removed
binutils/bfd/elf32-sh64.c
