514 lines
15 KiB
C
514 lines
15 KiB
C
/* OR32-specific support for 32-bit ELF
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Copyright (C) 2002-2014 Free Software Foundation, Inc.
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Contributed by Ivan Guzvinec <ivang@opencores.org>
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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 "sysdep.h"
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#include "bfd.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/or32.h"
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#include "libiberty.h"
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/* Try to minimize the amount of space occupied by relocation tables
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on the ROM (not that the ROM won't be swamped by other ELF overhead). */
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#define USE_REL 1
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/* Set the right machine number for an OR32 ELF file. */
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static bfd_boolean
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or32_elf_object_p (bfd *abfd)
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{
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(void) bfd_default_set_arch_mach (abfd, bfd_arch_or32, 0);
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return TRUE;
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}
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/* The final processing done just before writing out an OR32 ELF object file.
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This gets the OR32 architecture right based on the machine number. */
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static void
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or32_elf_final_write_processing (bfd *abfd,
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bfd_boolean linker ATTRIBUTE_UNUSED)
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{
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elf_elfheader (abfd)->e_flags &=~ EF_OR32_MACH;
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}
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static bfd_reloc_status_type
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or32_elf_32_reloc (bfd *abfd,
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arelent *reloc_entry,
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asymbol *symbol,
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void * data,
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asection *input_section,
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bfd *output_bfd,
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char **error_message ATTRIBUTE_UNUSED)
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{
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if (output_bfd != NULL)
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{
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unsigned long insn;
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bfd_size_type addr = reloc_entry->address;
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reloc_entry->address += input_section->output_offset;
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insn = bfd_get_32 (abfd, (bfd_byte *) data + addr);
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insn += symbol->section->output_section->vma;
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insn += symbol->section->output_offset;
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insn += symbol->value;
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bfd_put_32 (abfd, insn, (bfd_byte *) data + addr);
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return bfd_reloc_ok;
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}
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return bfd_reloc_continue;
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}
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static bfd_reloc_status_type
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or32_elf_16_reloc (bfd *abfd,
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arelent *reloc_entry,
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asymbol *symbol,
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void * data,
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asection *input_section,
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bfd *output_bfd,
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char **error_message ATTRIBUTE_UNUSED)
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{
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if (output_bfd != NULL)
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{
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unsigned short insn;
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bfd_size_type addr = reloc_entry->address;
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reloc_entry->address += input_section->output_offset;
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insn = bfd_get_16 (abfd, (bfd_byte *) data + addr);
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insn += symbol->section->output_section->vma;
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insn += symbol->section->output_offset;
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insn += symbol->value;
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bfd_put_16 (abfd, insn, (bfd_byte *) data + addr);
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return bfd_reloc_ok;
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}
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return bfd_reloc_continue;
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}
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static bfd_reloc_status_type
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or32_elf_8_reloc (bfd *abfd ATTRIBUTE_UNUSED,
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arelent *reloc_entry,
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asymbol *symbol,
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void * data,
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asection *input_section,
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bfd *output_bfd,
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char **error_message ATTRIBUTE_UNUSED)
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{
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if (output_bfd != NULL)
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{
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unsigned char insn;
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bfd_size_type addr = reloc_entry->address;
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reloc_entry->address += input_section->output_offset;
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insn = bfd_get_8 (abfd, (bfd_byte *) data + addr);
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insn += symbol->section->output_section->vma;
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insn += symbol->section->output_offset;
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insn += symbol->value;
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bfd_put_8 (abfd, insn, (bfd_byte *) data + addr);
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return bfd_reloc_ok;
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}
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return bfd_reloc_continue;
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}
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/* Do a R_OR32_CONSTH relocation. This has to be done in combination
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with a R_OR32_CONST reloc, because there is a carry from the LO16 to
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the HI16. Here we just save the information we need; we do the
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actual relocation when we see the LO16. OR32 ELF requires that the
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LO16 immediately follow the HI16. As a GNU extension, we permit an
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arbitrary number of HI16 relocs to be associated with a single LO16
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reloc. This extension permits gcc to output the HI and LO relocs
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itself. This code is copied from the elf32-mips.c. */
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struct or32_consth
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{
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struct or32_consth *next;
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bfd_byte *addr;
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bfd_vma addend;
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};
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/* FIXME: This should not be a static variable. */
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static struct or32_consth *or32_consth_list;
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static bfd_reloc_status_type
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or32_elf_consth_reloc (bfd *abfd ATTRIBUTE_UNUSED,
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arelent *reloc_entry,
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asymbol *symbol,
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void * data,
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asection *input_section,
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bfd *output_bfd,
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char **error_message ATTRIBUTE_UNUSED)
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{
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bfd_reloc_status_type ret;
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bfd_vma relocation;
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struct or32_consth *n;
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ret = bfd_reloc_ok;
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if (bfd_is_und_section (symbol->section)
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&& output_bfd == NULL)
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ret = bfd_reloc_undefined;
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if (bfd_is_com_section (symbol->section))
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relocation = 0;
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else
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relocation = symbol->value;
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relocation += symbol->section->output_section->vma;
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relocation += symbol->section->output_offset;
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relocation += reloc_entry->addend;
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if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
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return bfd_reloc_outofrange;
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/* Save the information, and let LO16 do the actual relocation. */
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n = bfd_malloc (sizeof *n);
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if (n == NULL)
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return bfd_reloc_outofrange;
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n->addr = (bfd_byte *) data + reloc_entry->address;
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n->addend = relocation;
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n->next = or32_consth_list;
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or32_consth_list = n;
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if (output_bfd != NULL)
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reloc_entry->address += input_section->output_offset;
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return ret;
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}
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/* Do a R_OR32_CONST relocation. This is a straightforward 16 bit
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inplace relocation; this function exists in order to do the
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R_OR32_CONSTH relocation described above. */
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static bfd_reloc_status_type
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or32_elf_const_reloc (bfd *abfd,
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arelent *reloc_entry,
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asymbol *symbol,
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void * data,
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asection *input_section,
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bfd *output_bfd,
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char **error_message)
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{
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if (or32_consth_list != NULL)
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{
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struct or32_consth *l;
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l = or32_consth_list;
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while (l != NULL)
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{
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unsigned long insn;
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unsigned long val;
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unsigned long vallo;
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struct or32_consth *next;
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/* Do the HI16 relocation. Note that we actually don't need
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to know anything about the LO16 itself, except where to
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find the low 16 bits of the addend needed by the LO16. */
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insn = bfd_get_32 (abfd, l->addr);
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vallo = (bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address)
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& 0xffff);
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val = ((insn & 0xffff) << 16) + vallo;
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val += l->addend;
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insn = (insn &~ 0xffff) | ((val >> 16) & 0xffff);
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bfd_put_32 (abfd, insn, l->addr);
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next = l->next;
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free (l);
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l = next;
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}
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or32_consth_list = NULL;
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}
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if (output_bfd != NULL)
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{
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unsigned long insn, tmp;
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bfd_size_type addr = reloc_entry->address;
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reloc_entry->address += input_section->output_offset;
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insn = bfd_get_32 (abfd, (bfd_byte *) data + addr);
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tmp = insn & 0x0000ffff;
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tmp += symbol->section->output_section->vma;
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tmp += symbol->section->output_offset;
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tmp += symbol->value;
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insn = (insn & 0xffff0000) | (tmp & 0x0000ffff);
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bfd_put_32 (abfd, insn, (bfd_byte *) data + addr);
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return bfd_reloc_ok;
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}
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/* Now do the LO16 reloc in the usual way. */
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return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
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input_section, output_bfd, error_message);
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}
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static bfd_reloc_status_type
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or32_elf_jumptarg_reloc (bfd *abfd,
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arelent *reloc_entry,
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asymbol *symbol ATTRIBUTE_UNUSED,
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void * data,
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asection *input_section,
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bfd *output_bfd,
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char **error_message ATTRIBUTE_UNUSED)
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{
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if (output_bfd != NULL)
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{
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unsigned long insn, tmp;
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bfd_size_type addr = reloc_entry->address;
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reloc_entry->address += input_section->output_offset;
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insn = bfd_get_32 (abfd, (bfd_byte *) data + addr);
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tmp = insn | 0xfc000000;
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tmp -= (input_section->output_offset >> 2);
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insn = (insn & 0xfc000000) | (tmp & 0x03ffffff);
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bfd_put_32 (abfd, insn, (bfd_byte *) data + addr);
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return bfd_reloc_ok;
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}
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return bfd_reloc_continue;
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}
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static reloc_howto_type elf_or32_howto_table[] =
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{
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/* This reloc does nothing. */
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HOWTO (R_OR32_NONE, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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bfd_elf_generic_reloc, /* special_function */
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"R_OR32_NONE", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A standard 32 bit relocation. */
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HOWTO (R_OR32_32, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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32, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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or32_elf_32_reloc, /* special_function */
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"R_OR32_32", /* name */
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FALSE, /* partial_inplace */
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0xffffffff, /* src_mask */
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0xffffffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A standard 16 bit relocation. */
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HOWTO (R_OR32_16, /* type */
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0, /* rightshift */
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1, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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or32_elf_16_reloc, /* special_function */
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"R_OR32_16", /* name */
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FALSE, /* partial_inplace */
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0x0000ffff, /* src_mask */
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0x0000ffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A standard 8 bit relocation. */
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HOWTO (R_OR32_8, /* type */
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0, /* rightshift */
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0, /* size (0 = byte, 1 = short, 2 = long) */
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8, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_bitfield, /* complain_on_overflow */
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or32_elf_8_reloc, /* special_function */
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"R_OR32_8", /* name */
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FALSE, /* partial_inplace */
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0x000000ff, /* src_mask */
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0x000000ff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A standard low 16 bit relocation. */
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HOWTO (R_OR32_CONST, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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or32_elf_const_reloc, /* special_function */
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"R_OR32_CONST", /* name */
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FALSE, /* partial_inplace */
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0x0000ffff, /* src_mask */
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0x0000ffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A standard high 16 bit relocation. */
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HOWTO (R_OR32_CONSTH, /* type */
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16, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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16, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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or32_elf_consth_reloc, /* special_function */
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"R_OR32_CONSTH", /* name */
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FALSE, /* partial_inplace */
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0xffff0000, /* src_mask */
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0x0000ffff, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* A standard branch relocation. */
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HOWTO (R_OR32_JUMPTARG, /* type */
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2, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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28, /* bitsize */
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TRUE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_signed, /* complain_on_overflow */
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or32_elf_jumptarg_reloc,/* special_function */
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"R_OR32_JUMPTARG", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0x03ffffff, /* dst_mask */
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TRUE), /* pcrel_offset */
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/* GNU extension to record C++ vtable hierarchy. */
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HOWTO (R_OR32_GNU_VTINHERIT, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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NULL, /* special_function */
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"R_OR32_GNU_VTINHERIT", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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FALSE), /* pcrel_offset */
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/* GNU extension to record C++ vtable member usage. */
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HOWTO (R_OR32_GNU_VTENTRY, /* type */
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0, /* rightshift */
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2, /* size (0 = byte, 1 = short, 2 = long) */
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0, /* bitsize */
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FALSE, /* pc_relative */
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0, /* bitpos */
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complain_overflow_dont, /* complain_on_overflow */
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_bfd_elf_rel_vtable_reloc_fn, /* special_function */
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"R_OR32_GNU_VTENTRY", /* name */
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FALSE, /* partial_inplace */
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0, /* src_mask */
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0, /* dst_mask */
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FALSE), /* pcrel_offset */
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};
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/* Map BFD reloc types to OR32 ELF reloc types. */
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struct or32_reloc_map
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{
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bfd_reloc_code_real_type bfd_reloc_val;
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unsigned char elf_reloc_val;
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};
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static const struct or32_reloc_map or32_reloc_map[] =
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{
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{ BFD_RELOC_NONE, R_OR32_NONE },
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{ BFD_RELOC_32, R_OR32_32 },
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{ BFD_RELOC_16, R_OR32_16 },
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{ BFD_RELOC_8, R_OR32_8 },
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{ BFD_RELOC_LO16, R_OR32_CONST },
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{ BFD_RELOC_HI16, R_OR32_CONSTH },
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{ BFD_RELOC_32_GOT_PCREL, R_OR32_JUMPTARG },
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{ BFD_RELOC_VTABLE_INHERIT, R_OR32_GNU_VTINHERIT },
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{ BFD_RELOC_VTABLE_ENTRY, R_OR32_GNU_VTENTRY },
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};
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static reloc_howto_type *
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bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
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bfd_reloc_code_real_type code)
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{
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unsigned int i;
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for (i = ARRAY_SIZE (or32_reloc_map); i--;)
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if (or32_reloc_map[i].bfd_reloc_val == code)
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return &elf_or32_howto_table[or32_reloc_map[i].elf_reloc_val];
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return NULL;
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}
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static reloc_howto_type *
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bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
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const char *r_name)
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{
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unsigned int i;
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for (i = 0;
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i < sizeof (elf_or32_howto_table) / sizeof (elf_or32_howto_table[0]);
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i++)
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if (elf_or32_howto_table[i].name != NULL
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&& strcasecmp (elf_or32_howto_table[i].name, r_name) == 0)
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return &elf_or32_howto_table[i];
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return NULL;
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}
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/* Set the howto pointer for an OR32 ELF reloc. */
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static void
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or32_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
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arelent *cache_ptr,
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Elf_Internal_Rela *dst)
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{
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unsigned int r_type;
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r_type = ELF32_R_TYPE (dst->r_info);
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BFD_ASSERT (r_type < (unsigned int) R_OR32_max);
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|
cache_ptr->howto = &elf_or32_howto_table[r_type];
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|
}
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#define TARGET_LITTLE_SYM bfd_elf32_or32_little_vec
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|
#define TARGET_LITTLE_NAME "elf32-littleor32"
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|
#define TARGET_BIG_SYM bfd_elf32_or32_big_vec
|
|
#define TARGET_BIG_NAME "elf32-or32"
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|
#define ELF_ARCH bfd_arch_or32
|
|
#define ELF_MACHINE_CODE EM_OR32
|
|
#define ELF_MAXPAGESIZE 0x1000
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|
|
|
#define elf_info_to_howto 0
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|
#define elf_info_to_howto_rel or32_info_to_howto_rel
|
|
#define elf_backend_object_p or32_elf_object_p
|
|
#define elf_backend_final_write_processing \
|
|
or32_elf_final_write_processing
|
|
|
|
#include "elf32-target.h"
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