5634 lines
170 KiB
C
5634 lines
170 KiB
C
/* ADI Blackfin BFD support for 32-bit ELF.
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Copyright 2005, 2006 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301,
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USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/bfin.h"
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#include "elf/dwarf2.h"
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#include "hashtab.h"
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/* FUNCTION : bfin_pltpc_reloc
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ABSTRACT : TODO : figure out how to handle pltpc relocs. */
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static bfd_reloc_status_type
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bfin_pltpc_reloc (
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bfd *abfd ATTRIBUTE_UNUSED,
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arelent *reloc_entry ATTRIBUTE_UNUSED,
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asymbol *symbol ATTRIBUTE_UNUSED,
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PTR data ATTRIBUTE_UNUSED,
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asection *input_section ATTRIBUTE_UNUSED,
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bfd *output_bfd ATTRIBUTE_UNUSED,
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char **error_message ATTRIBUTE_UNUSED)
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{
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bfd_reloc_status_type flag = bfd_reloc_ok;
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return flag;
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}
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static bfd_reloc_status_type
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bfin_pcrel24_reloc (bfd *abfd,
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arelent *reloc_entry,
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asymbol *symbol,
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PTR 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_vma relocation;
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bfd_size_type addr = reloc_entry->address;
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bfd_vma output_base = 0;
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reloc_howto_type *howto = reloc_entry->howto;
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asection *output_section;
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bfd_boolean relocatable = (output_bfd != NULL);
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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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if (bfd_is_und_section (symbol->section)
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&& (symbol->flags & BSF_WEAK) == 0
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&& !relocatable)
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return 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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output_section = symbol->section->output_section;
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if (relocatable)
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output_base = 0;
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else
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output_base = output_section->vma;
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if (!relocatable || !strcmp (symbol->name, symbol->section->name))
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relocation += output_base + symbol->section->output_offset;
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if (!relocatable && !strcmp (symbol->name, symbol->section->name))
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relocation += reloc_entry->addend;
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relocation -= input_section->output_section->vma + input_section->output_offset;
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relocation -= reloc_entry->address;
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if (howto->complain_on_overflow != complain_overflow_dont)
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{
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bfd_reloc_status_type status;
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status = bfd_check_overflow (howto->complain_on_overflow,
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howto->bitsize,
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howto->rightshift,
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bfd_arch_bits_per_address(abfd),
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relocation);
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if (status != bfd_reloc_ok)
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return status;
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}
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/* if rightshift is 1 and the number odd, return error. */
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if (howto->rightshift && (relocation & 0x01))
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{
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fprintf(stderr, "relocation should be even number\n");
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return bfd_reloc_overflow;
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}
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relocation >>= (bfd_vma) howto->rightshift;
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/* Shift everything up to where it's going to be used. */
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relocation <<= (bfd_vma) howto->bitpos;
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if (relocatable)
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{
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reloc_entry->address += input_section->output_offset;
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reloc_entry->addend += symbol->section->output_offset;
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}
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{
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short x;
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/* We are getting reloc_entry->address 2 byte off from
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the start of instruction. Assuming absolute postion
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of the reloc data. But, following code had been written assuming
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reloc address is starting at begining of instruction.
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To compensate that I have increased the value of
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relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
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relocation += 1;
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x = bfd_get_16 (abfd, (bfd_byte *) data + addr - 2);
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x = (x & 0xff00) | ((relocation >> 16) & 0xff);
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bfd_put_16 (abfd, x, (unsigned char *) data + addr - 2);
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x = bfd_get_16 (abfd, (bfd_byte *) data + addr);
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x = relocation & 0xFFFF;
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bfd_put_16 (abfd, x, (unsigned char *) data + addr );
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}
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return bfd_reloc_ok;
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}
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static bfd_reloc_status_type
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bfin_imm16_reloc (bfd *abfd,
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arelent *reloc_entry,
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asymbol *symbol,
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PTR 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_vma relocation, x;
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bfd_size_type reloc_addr = reloc_entry->address;
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bfd_vma output_base = 0;
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reloc_howto_type *howto = reloc_entry->howto;
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asection *output_section;
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bfd_boolean relocatable = (output_bfd != NULL);
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/* Is the address of the relocation really within the section? */
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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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if (bfd_is_und_section (symbol->section)
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&& (symbol->flags & BSF_WEAK) == 0
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&& !relocatable)
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return bfd_reloc_undefined;
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output_section = symbol->section->output_section;
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relocation = symbol->value;
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/* Convert input-section-relative symbol value to absolute. */
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if (relocatable)
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output_base = 0;
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else
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output_base = output_section->vma;
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if (!relocatable || !strcmp (symbol->name, symbol->section->name))
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relocation += output_base + symbol->section->output_offset;
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/* Add in supplied addend. */
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relocation += reloc_entry->addend;
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if (relocatable)
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{
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reloc_entry->address += input_section->output_offset;
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reloc_entry->addend += symbol->section->output_offset;
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}
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else
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{
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reloc_entry->addend = 0;
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}
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if (howto->complain_on_overflow != complain_overflow_dont)
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{
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bfd_reloc_status_type flag;
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flag = bfd_check_overflow (howto->complain_on_overflow,
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howto->bitsize,
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howto->rightshift,
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bfd_arch_bits_per_address(abfd),
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relocation);
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if (flag != bfd_reloc_ok)
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return flag;
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}
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/* Here the variable relocation holds the final address of the
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symbol we are relocating against, plus any addend. */
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relocation >>= (bfd_vma) howto->rightshift;
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x = relocation;
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bfd_put_16 (abfd, x, (unsigned char *) data + reloc_addr);
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return bfd_reloc_ok;
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}
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static bfd_reloc_status_type
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bfin_byte4_reloc (bfd *abfd,
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arelent *reloc_entry,
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asymbol *symbol,
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PTR 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_vma relocation, x;
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bfd_size_type addr = reloc_entry->address;
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bfd_vma output_base = 0;
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asection *output_section;
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bfd_boolean relocatable = (output_bfd != NULL);
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/* Is the address of the relocation really within the section? */
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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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if (bfd_is_und_section (symbol->section)
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&& (symbol->flags & BSF_WEAK) == 0
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&& !relocatable)
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return bfd_reloc_undefined;
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output_section = symbol->section->output_section;
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relocation = symbol->value;
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/* Convert input-section-relative symbol value to absolute. */
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if (relocatable)
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output_base = 0;
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else
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output_base = output_section->vma;
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if ((symbol->name
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&& symbol->section->name
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&& !strcmp (symbol->name, symbol->section->name))
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|| !relocatable)
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{
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relocation += output_base + symbol->section->output_offset;
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}
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relocation += reloc_entry->addend;
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if (relocatable)
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{
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/* This output will be relocatable ... like ld -r. */
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reloc_entry->address += input_section->output_offset;
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reloc_entry->addend += symbol->section->output_offset;
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}
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else
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{
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reloc_entry->addend = 0;
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}
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/* Here the variable relocation holds the final address of the
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symbol we are relocating against, plus any addend. */
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x = relocation & 0xFFFF0000;
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x >>=16;
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bfd_put_16 (abfd, x, (unsigned char *) data + addr + 2);
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x = relocation & 0x0000FFFF;
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bfd_put_16 (abfd, x, (unsigned char *) data + addr);
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return bfd_reloc_ok;
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}
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/* bfin_bfd_reloc handles the blackfin arithmetic relocations.
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Use this instead of bfd_perform_relocation. */
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static bfd_reloc_status_type
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bfin_bfd_reloc (bfd *abfd,
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arelent *reloc_entry,
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asymbol *symbol,
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PTR 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_vma relocation;
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bfd_size_type addr = reloc_entry->address;
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bfd_vma output_base = 0;
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reloc_howto_type *howto = reloc_entry->howto;
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asection *output_section;
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bfd_boolean relocatable = (output_bfd != NULL);
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/* Is the address of the relocation really within the section? */
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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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if (bfd_is_und_section (symbol->section)
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&& (symbol->flags & BSF_WEAK) == 0
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&& !relocatable)
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return bfd_reloc_undefined;
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/* Get symbol value. (Common symbols are special.) */
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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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output_section = symbol->section->output_section;
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/* Convert input-section-relative symbol value to absolute. */
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if (relocatable)
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output_base = 0;
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else
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output_base = output_section->vma;
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if (!relocatable || !strcmp (symbol->name, symbol->section->name))
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relocation += output_base + symbol->section->output_offset;
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if (!relocatable && !strcmp (symbol->name, symbol->section->name))
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{
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/* Add in supplied addend. */
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relocation += reloc_entry->addend;
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}
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/* Here the variable relocation holds the final address of the
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symbol we are relocating against, plus any addend. */
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if (howto->pc_relative == TRUE)
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{
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relocation -= input_section->output_section->vma + input_section->output_offset;
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if (howto->pcrel_offset == TRUE)
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relocation -= reloc_entry->address;
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}
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if (relocatable)
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{
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reloc_entry->address += input_section->output_offset;
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reloc_entry->addend += symbol->section->output_offset;
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}
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if (howto->complain_on_overflow != complain_overflow_dont)
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{
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bfd_reloc_status_type status;
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status = bfd_check_overflow (howto->complain_on_overflow,
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howto->bitsize,
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howto->rightshift,
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bfd_arch_bits_per_address(abfd),
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relocation);
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if (status != bfd_reloc_ok)
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return status;
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}
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/* If rightshift is 1 and the number odd, return error. */
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if (howto->rightshift && (relocation & 0x01))
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{
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fprintf(stderr, "relocation should be even number\n");
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return bfd_reloc_overflow;
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}
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relocation >>= (bfd_vma) howto->rightshift;
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/* Shift everything up to where it's going to be used. */
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relocation <<= (bfd_vma) howto->bitpos;
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#define DOIT(x) \
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x = ( (x & ~howto->dst_mask) | (relocation & howto->dst_mask))
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/* handle 8 and 16 bit relocations here. */
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switch (howto->size)
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{
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case 0:
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{
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char x = bfd_get_8 (abfd, (char *) data + addr);
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DOIT (x);
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bfd_put_8 (abfd, x, (unsigned char *) data + addr);
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}
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break;
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case 1:
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{
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unsigned short x = bfd_get_16 (abfd, (bfd_byte *) data + addr);
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DOIT (x);
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bfd_put_16 (abfd, (bfd_vma) x, (unsigned char *) data + addr);
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}
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break;
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default:
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return bfd_reloc_other;
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||
}
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||
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return bfd_reloc_ok;
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||
}
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/* HOWTO Table for blackfin.
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Blackfin relocations are fairly complicated.
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Some of the salient features are
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a. Even numbered offsets. A number of (not all) relocations are
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even numbered. This means that the rightmost bit is not stored.
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Needs to right shift by 1 and check to see if value is not odd
|
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b. A relocation can be an expression. An expression takes on
|
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a variety of relocations arranged in a stack.
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As a result, we cannot use the standard generic function as special
|
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function. We will have our own, which is very similar to the standard
|
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generic function except that it understands how to get the value from
|
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the relocation stack. . */
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|
||
#define BFIN_RELOC_MIN 0
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#define BFIN_RELOC_MAX 0x21
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#define BFIN_GNUEXT_RELOC_MIN 0x40
|
||
#define BFIN_GNUEXT_RELOC_MAX 0x43
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||
#define BFIN_ARELOC_MIN 0xE0
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||
#define BFIN_ARELOC_MAX 0xF3
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||
|
||
static reloc_howto_type bfin_howto_table [] =
|
||
{
|
||
/* This reloc does nothing. . */
|
||
HOWTO (R_unused0, /* type. */
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||
0, /* rightshift. */
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||
2, /* size (0 = byte, 1 = short, 2 = long). */
|
||
32, /* bitsize. */
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||
FALSE, /* pc_relative. */
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||
0, /* bitpos. */
|
||
complain_overflow_bitfield, /* complain_on_overflow. */
|
||
bfd_elf_generic_reloc, /* special_function. */
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||
"R_unused0", /* name. */
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||
FALSE, /* partial_inplace. */
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0, /* src_mask. */
|
||
0, /* dst_mask. */
|
||
FALSE), /* pcrel_offset. */
|
||
|
||
HOWTO (R_pcrel5m2, /* type. */
|
||
1, /* rightshift. */
|
||
1, /* size (0 = byte, 1 = short, 2 = long).. */
|
||
4, /* bitsize. */
|
||
TRUE, /* pc_relative. */
|
||
0, /* bitpos. */
|
||
complain_overflow_unsigned, /* complain_on_overflow. */
|
||
bfin_bfd_reloc, /* special_function. */
|
||
"R_pcrel5m2", /* name. */
|
||
FALSE, /* partial_inplace. */
|
||
0, /* src_mask. */
|
||
0x0000000F, /* dst_mask. */
|
||
FALSE), /* pcrel_offset. */
|
||
|
||
HOWTO (R_unused1, /* type. */
|
||
0, /* rightshift. */
|
||
2, /* size (0 = byte, 1 = short, 2 = long). */
|
||
32, /* bitsize. */
|
||
FALSE, /* pc_relative. */
|
||
0, /* bitpos. */
|
||
complain_overflow_bitfield, /* complain_on_overflow. */
|
||
bfd_elf_generic_reloc, /* special_function. */
|
||
"R_unused1", /* name. */
|
||
FALSE, /* partial_inplace. */
|
||
0, /* src_mask. */
|
||
0, /* dst_mask. */
|
||
FALSE), /* pcrel_offset. */
|
||
|
||
HOWTO (R_pcrel10, /* type. */
|
||
1, /* rightshift. */
|
||
1, /* size (0 = byte, 1 = short, 2 = long). */
|
||
10, /* bitsize. */
|
||
TRUE, /* pc_relative. */
|
||
0, /* bitpos. */
|
||
complain_overflow_signed, /* complain_on_overflow. */
|
||
bfin_bfd_reloc, /* special_function. */
|
||
"R_pcrel10", /* name. */
|
||
FALSE, /* partial_inplace. */
|
||
0, /* src_mask. */
|
||
0x000003FF, /* dst_mask. */
|
||
TRUE), /* pcrel_offset. */
|
||
|
||
HOWTO (R_pcrel12_jump, /* type. */
|
||
1, /* rightshift. */
|
||
/* the offset is actually 13 bit
|
||
aligned on a word boundary so
|
||
only 12 bits have to be used.
|
||
Right shift the rightmost bit.. */
|
||
1, /* size (0 = byte, 1 = short, 2 = long). */
|
||
12, /* bitsize. */
|
||
TRUE, /* pc_relative. */
|
||
0, /* bitpos. */
|
||
complain_overflow_signed, /* complain_on_overflow. */
|
||
bfin_bfd_reloc, /* special_function. */
|
||
"R_pcrel12_jump", /* name. */
|
||
FALSE, /* partial_inplace. */
|
||
0, /* src_mask. */
|
||
0x0FFF, /* dst_mask. */
|
||
TRUE), /* pcrel_offset. */
|
||
|
||
HOWTO (R_rimm16, /* type. */
|
||
0, /* rightshift. */
|
||
1, /* size (0 = byte, 1 = short, 2 = long). */
|
||
16, /* bitsize. */
|
||
FALSE, /* pc_relative. */
|
||
0, /* bitpos. */
|
||
complain_overflow_signed, /* complain_on_overflow. */
|
||
bfin_imm16_reloc, /* special_function. */
|
||
"R_rimm16", /* name. */
|
||
FALSE, /* partial_inplace. */
|
||
0, /* src_mask. */
|
||
0x0000FFFF, /* dst_mask. */
|
||
TRUE), /* pcrel_offset. */
|
||
|
||
HOWTO (R_luimm16, /* type. */
|
||
0, /* rightshift. */
|
||
1, /* size (0 = byte, 1 = short, 2 = long). */
|
||
16, /* bitsize. */
|
||
FALSE, /* pc_relative. */
|
||
0, /* bitpos. */
|
||
complain_overflow_dont, /* complain_on_overflow. */
|
||
bfin_imm16_reloc, /* special_function. */
|
||
"R_luimm16", /* name. */
|
||
FALSE, /* partial_inplace. */
|
||
0, /* src_mask. */
|
||
0x0000FFFF, /* dst_mask. */
|
||
TRUE), /* pcrel_offset. */
|
||
|
||
HOWTO (R_huimm16, /* type. */
|
||
16, /* rightshift. */
|
||
1, /* size (0 = byte, 1 = short, 2 = long). */
|
||
16, /* bitsize. */
|
||
FALSE, /* pc_relative. */
|
||
0, /* bitpos. */
|
||
complain_overflow_unsigned, /* complain_on_overflow. */
|
||
bfin_imm16_reloc, /* special_function. */
|
||
"R_huimm16", /* name. */
|
||
FALSE, /* partial_inplace. */
|
||
0, /* src_mask. */
|
||
0x0000FFFF, /* dst_mask. */
|
||
TRUE), /* pcrel_offset. */
|
||
|
||
HOWTO (R_pcrel12_jump_s, /* type. */
|
||
1, /* rightshift. */
|
||
1, /* size (0 = byte, 1 = short, 2 = long). */
|
||
12, /* bitsize. */
|
||
TRUE, /* pc_relative. */
|
||
0, /* bitpos. */
|
||
complain_overflow_signed, /* complain_on_overflow. */
|
||
bfin_bfd_reloc, /* special_function. */
|
||
"R_pcrel12_jump_s", /* name. */
|
||
FALSE, /* partial_inplace. */
|
||
0, /* src_mask. */
|
||
0x00000FFF, /* dst_mask. */
|
||
TRUE), /* pcrel_offset. */
|
||
|
||
HOWTO (R_pcrel24_jump_x, /* type. */
|
||
1, /* rightshift. */
|
||
2, /* size (0 = byte, 1 = short, 2 = long). */
|
||
24, /* bitsize. */
|
||
TRUE, /* pc_relative. */
|
||
0, /* bitpos. */
|
||
complain_overflow_signed, /* complain_on_overflow. */
|
||
bfin_pcrel24_reloc, /* special_function. */
|
||
"R_pcrel24_jump_x", /* name. */
|
||
FALSE, /* partial_inplace. */
|
||
0, /* src_mask. */
|
||
0x00FFFFFF, /* dst_mask. */
|
||
TRUE), /* pcrel_offset. */
|
||
|
||
HOWTO (R_pcrel24, /* type. */
|
||
1, /* rightshift. */
|
||
2, /* size (0 = byte, 1 = short, 2 = long). */
|
||
24, /* bitsize. */
|
||
TRUE, /* pc_relative. */
|
||
0, /* bitpos. */
|
||
complain_overflow_signed, /* complain_on_overflow. */
|
||
bfin_pcrel24_reloc, /* special_function. */
|
||
"R_pcrel24", /* name. */
|
||
FALSE, /* partial_inplace. */
|
||
0, /* src_mask. */
|
||
0x00FFFFFF, /* dst_mask. */
|
||
TRUE), /* pcrel_offset. */
|
||
|
||
HOWTO (R_unusedb, /* type. */
|
||
0, /* rightshift. */
|
||
2, /* size (0 = byte, 1 = short, 2 = long). */
|
||
32, /* bitsize. */
|
||
FALSE, /* pc_relative. */
|
||
0, /* bitpos. */
|
||
complain_overflow_dont, /* complain_on_overflow. */
|
||
bfd_elf_generic_reloc, /* special_function. */
|
||
"R_unusedb", /* name. */
|
||
FALSE, /* partial_inplace. */
|
||
0, /* src_mask. */
|
||
0, /* dst_mask. */
|
||
FALSE), /* pcrel_offset. */
|
||
|
||
HOWTO (R_unusedc, /* type. */
|
||
0, /* rightshift. */
|
||
2, /* size (0 = byte, 1 = short, 2 = long). */
|
||
32, /* bitsize. */
|
||
FALSE, /* pc_relative. */
|
||
0, /* bitpos. */
|
||
complain_overflow_dont, /* complain_on_overflow. */
|
||
bfd_elf_generic_reloc, /* special_function. */
|
||
"R_unusedc", /* name. */
|
||
FALSE, /* partial_inplace. */
|
||
0, /* src_mask. */
|
||
0, /* dst_mask. */
|
||
FALSE), /* pcrel_offset. */
|
||
|
||
HOWTO (R_pcrel24_jump_l, /* type. */
|
||
1, /* rightshift. */
|
||
2, /* size (0 = byte, 1 = short, 2 = long). */
|
||
24, /* bitsize. */
|
||
TRUE, /* pc_relative. */
|
||
0, /* bitpos. */
|
||
complain_overflow_signed, /* complain_on_overflow. */
|
||
bfin_pcrel24_reloc, /* special_function. */
|
||
"R_pcrel24_jump_l", /* name. */
|
||
FALSE, /* partial_inplace. */
|
||
0, /* src_mask. */
|
||
0x00FFFFFF, /* dst_mask. */
|
||
TRUE), /* pcrel_offset. */
|
||
|
||
HOWTO (R_pcrel24_call_x, /* type. */
|
||
1, /* rightshift. */
|
||
2, /* size (0 = byte, 1 = short, 2 = long). */
|
||
24, /* bitsize. */
|
||
TRUE, /* pc_relative. */
|
||
0, /* bitpos. */
|
||
complain_overflow_signed, /* complain_on_overflow. */
|
||
bfin_pcrel24_reloc, /* special_function. */
|
||
"R_pcrel24_call_x", /* name. */
|
||
FALSE, /* partial_inplace. */
|
||
0, /* src_mask. */
|
||
0x00FFFFFF, /* dst_mask. */
|
||
TRUE), /* pcrel_offset. */
|
||
|
||
HOWTO (R_var_eq_symb, /* type. */
|
||
0, /* rightshift. */
|
||
2, /* size (0 = byte, 1 = short, 2 = long). */
|
||
32, /* bitsize. */
|
||
FALSE, /* pc_relative. */
|
||
0, /* bitpos. */
|
||
complain_overflow_bitfield, /* complain_on_overflow. */
|
||
bfin_bfd_reloc, /* special_function. */
|
||
"R_var_eq_symb", /* name. */
|
||
FALSE, /* partial_inplace. */
|
||
0, /* src_mask. */
|
||
0, /* dst_mask. */
|
||
FALSE), /* pcrel_offset. */
|
||
|
||
HOWTO (R_byte_data, /* type. */
|
||
0, /* rightshift. */
|
||
0, /* size (0 = byte, 1 = short, 2 = long). */
|
||
8, /* bitsize. */
|
||
FALSE, /* pc_relative. */
|
||
0, /* bitpos. */
|
||
complain_overflow_unsigned, /* complain_on_overflow. */
|
||
bfin_bfd_reloc, /* special_function. */
|
||
"R_byte_data", /* name. */
|
||
FALSE, /* partial_inplace. */
|
||
0, /* src_mask. */
|
||
0xFF, /* dst_mask. */
|
||
TRUE), /* pcrel_offset. */
|
||
|
||
HOWTO (R_byte2_data, /* type. */
|
||
0, /* rightshift. */
|
||
1, /* size (0 = byte, 1 = short, 2 = long). */
|
||
16, /* bitsize. */
|
||
FALSE, /* pc_relative. */
|
||
0, /* bitpos. */
|
||
complain_overflow_signed, /* complain_on_overflow. */
|
||
bfin_bfd_reloc, /* special_function. */
|
||
"R_byte2_data", /* name. */
|
||
FALSE, /* partial_inplace. */
|
||
0, /* src_mask. */
|
||
0xFFFF, /* dst_mask. */
|
||
TRUE), /* pcrel_offset. */
|
||
|
||
HOWTO (R_byte4_data, /* type. */
|
||
0, /* rightshift. */
|
||
2, /* size (0 = byte, 1 = short, 2 = long). */
|
||
32, /* bitsize. */
|
||
FALSE, /* pc_relative. */
|
||
0, /* bitpos. */
|
||
complain_overflow_unsigned, /* complain_on_overflow. */
|
||
bfin_byte4_reloc, /* special_function. */
|
||
"R_byte4_data", /* name. */
|
||
FALSE, /* partial_inplace. */
|
||
0, /* src_mask. */
|
||
0xFFFFFFFF, /* dst_mask. */
|
||
TRUE), /* pcrel_offset. */
|
||
|
||
HOWTO (R_pcrel11, /* type. */
|
||
1, /* rightshift. */
|
||
1, /* size (0 = byte, 1 = short, 2 = long). */
|
||
10, /* bitsize. */
|
||
TRUE, /* pc_relative. */
|
||
0, /* bitpos. */
|
||
complain_overflow_unsigned, /* complain_on_overflow. */
|
||
bfin_bfd_reloc, /* special_function. */
|
||
"R_pcrel11", /* name. */
|
||
FALSE, /* partial_inplace. */
|
||
0, /* src_mask. */
|
||
0x000003FF, /* dst_mask. */
|
||
FALSE), /* pcrel_offset. */
|
||
|
||
|
||
/* A 18-bit signed operand with the GOT offset for the address of
|
||
the symbol. */
|
||
HOWTO (R_BFIN_GOT17M4, /* type */
|
||
2, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_BFIN_GOT12", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* The upper 16 bits of the GOT offset for the address of the
|
||
symbol. */
|
||
HOWTO (R_BFIN_GOTHI, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_BFIN_GOTHI", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* The lower 16 bits of the GOT offset for the address of the
|
||
symbol. */
|
||
HOWTO (R_BFIN_GOTLO, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_BFIN_GOTLO", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* The 32-bit address of the canonical descriptor of a function. */
|
||
HOWTO (R_BFIN_FUNCDESC, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
32, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_BFIN_FUNCDESC", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0xffffffff, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* A 12-bit signed operand with the GOT offset for the address of
|
||
canonical descriptor of a function. */
|
||
HOWTO (R_BFIN_FUNCDESC_GOT17M4, /* type */
|
||
2, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_BFIN_FUNCDESC_GOT17M4", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* The upper 16 bits of the GOT offset for the address of the
|
||
canonical descriptor of a function. */
|
||
HOWTO (R_BFIN_FUNCDESC_GOTHI, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_BFIN_FUNCDESC_GOTHI", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* The lower 16 bits of the GOT offset for the address of the
|
||
canonical descriptor of a function. */
|
||
HOWTO (R_BFIN_FUNCDESC_GOTLO, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_BFIN_FUNCDESC_GOTLO", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* The 32-bit address of the canonical descriptor of a function. */
|
||
HOWTO (R_BFIN_FUNCDESC_VALUE, /* type */
|
||
0, /* rightshift */
|
||
2, /* size (0 = byte, 1 = short, 2 = long) */
|
||
64, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_bitfield, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_BFIN_FUNCDESC_VALUE", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0xffffffff, /* src_mask */
|
||
0xffffffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* A 12-bit signed operand with the GOT offset for the address of
|
||
canonical descriptor of a function. */
|
||
HOWTO (R_BFIN_FUNCDESC_GOTOFF17M4, /* type */
|
||
2, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_BFIN_FUNCDESC_GOTOFF17M4", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* The upper 16 bits of the GOT offset for the address of the
|
||
canonical descriptor of a function. */
|
||
HOWTO (R_BFIN_FUNCDESC_GOTOFFHI, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_BFIN_FUNCDESC_GOTOFFHI", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* The lower 16 bits of the GOT offset for the address of the
|
||
canonical descriptor of a function. */
|
||
HOWTO (R_BFIN_FUNCDESC_GOTOFFLO, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_BFIN_FUNCDESC_GOTOFFLO", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* A 12-bit signed operand with the GOT offset for the address of
|
||
the symbol. */
|
||
HOWTO (R_BFIN_GOTOFF17M4, /* type */
|
||
2, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_signed, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_BFIN_GOTOFF17M4", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* The upper 16 bits of the GOT offset for the address of the
|
||
symbol. */
|
||
HOWTO (R_BFIN_GOTOFFHI, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_BFIN_GOTOFFHI", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
|
||
/* The lower 16 bits of the GOT offset for the address of the
|
||
symbol. */
|
||
HOWTO (R_BFIN_GOTOFFLO, /* type */
|
||
0, /* rightshift */
|
||
1, /* size (0 = byte, 1 = short, 2 = long) */
|
||
16, /* bitsize */
|
||
FALSE, /* pc_relative */
|
||
0, /* bitpos */
|
||
complain_overflow_dont, /* complain_on_overflow */
|
||
bfd_elf_generic_reloc, /* special_function */
|
||
"R_BFIN_GOTOFFLO", /* name */
|
||
FALSE, /* partial_inplace */
|
||
0xffff, /* src_mask */
|
||
0xffff, /* dst_mask */
|
||
FALSE), /* pcrel_offset */
|
||
};
|
||
|
||
static reloc_howto_type bfin_gnuext_howto_table [] =
|
||
{
|
||
HOWTO (R_pltpc, /* type. */
|
||
0, /* rightshift. */
|
||
1, /* size (0 = byte, 1 = short, 2 = long). */
|
||
16, /* bitsize. */
|
||
FALSE, /* pc_relative. */
|
||
0, /* bitpos. */
|
||
complain_overflow_bitfield, /* complain_on_overflow. */
|
||
bfin_pltpc_reloc, /* special_function. */
|
||
"R_pltpc", /* name. */
|
||
FALSE, /* partial_inplace. */
|
||
0xffff, /* src_mask. */
|
||
0xffff, /* dst_mask. */
|
||
FALSE), /* pcrel_offset. */
|
||
|
||
HOWTO (R_got, /* type. */
|
||
0, /* rightshift. */
|
||
1, /* size (0 = byte, 1 = short, 2 = long). */
|
||
16, /* bitsize. */
|
||
FALSE, /* pc_relative. */
|
||
0, /* bitpos. */
|
||
complain_overflow_bitfield, /* complain_on_overflow. */
|
||
bfd_elf_generic_reloc, /* special_function. */
|
||
"R_got", /* name. */
|
||
FALSE, /* partial_inplace. */
|
||
0x7fff, /* src_mask. */
|
||
0x7fff, /* dst_mask. */
|
||
FALSE), /* pcrel_offset. */
|
||
|
||
/* GNU extension to record C++ vtable hierarchy. */
|
||
HOWTO (R_BFIN_GNU_VTINHERIT, /* type. */
|
||
0, /* rightshift. */
|
||
2, /* size (0 = byte, 1 = short, 2 = long). */
|
||
0, /* bitsize. */
|
||
FALSE, /* pc_relative. */
|
||
0, /* bitpos. */
|
||
complain_overflow_dont, /* complain_on_overflow. */
|
||
NULL, /* special_function. */
|
||
"R_BFIN_GNU_VTINHERIT", /* name. */
|
||
FALSE, /* partial_inplace. */
|
||
0, /* src_mask. */
|
||
0, /* dst_mask. */
|
||
FALSE), /* pcrel_offset. */
|
||
|
||
/* GNU extension to record C++ vtable member usage. */
|
||
HOWTO (R_BFIN_GNU_VTENTRY, /* type. */
|
||
0, /* rightshift. */
|
||
2, /* size (0 = byte, 1 = short, 2 = long). */
|
||
0, /* bitsize. */
|
||
FALSE, /* pc_relative. */
|
||
0, /* bitpos. */
|
||
complain_overflow_dont, /* complain_on_overflow. */
|
||
_bfd_elf_rel_vtable_reloc_fn, /* special_function. */
|
||
"R_BFIN_GNU_VTENTRY", /* name. */
|
||
FALSE, /* partial_inplace. */
|
||
0, /* src_mask. */
|
||
0, /* dst_mask. */
|
||
FALSE) /* pcrel_offset. */
|
||
};
|
||
|
||
struct bfin_reloc_map
|
||
{
|
||
bfd_reloc_code_real_type bfd_reloc_val;
|
||
unsigned int bfin_reloc_val;
|
||
};
|
||
|
||
static const struct bfin_reloc_map bfin_reloc_map [] =
|
||
{
|
||
{ BFD_RELOC_NONE, R_unused0 },
|
||
{ BFD_RELOC_BFIN_5_PCREL, R_pcrel5m2 },
|
||
{ BFD_RELOC_NONE, R_unused1 },
|
||
{ BFD_RELOC_BFIN_10_PCREL, R_pcrel10 },
|
||
{ BFD_RELOC_BFIN_12_PCREL_JUMP, R_pcrel12_jump },
|
||
{ BFD_RELOC_BFIN_16_IMM, R_rimm16 },
|
||
{ BFD_RELOC_BFIN_16_LOW, R_luimm16 },
|
||
{ BFD_RELOC_BFIN_16_HIGH, R_huimm16 },
|
||
{ BFD_RELOC_BFIN_12_PCREL_JUMP_S, R_pcrel12_jump_s },
|
||
{ BFD_RELOC_24_PCREL, R_pcrel24 },
|
||
{ BFD_RELOC_24_PCREL, R_pcrel24 },
|
||
{ BFD_RELOC_BFIN_24_PCREL_JUMP_L, R_pcrel24_jump_l },
|
||
{ BFD_RELOC_NONE, R_unusedb },
|
||
{ BFD_RELOC_NONE, R_unusedc },
|
||
{ BFD_RELOC_BFIN_24_PCREL_CALL_X, R_pcrel24_call_x },
|
||
{ BFD_RELOC_8, R_byte_data },
|
||
{ BFD_RELOC_16, R_byte2_data },
|
||
{ BFD_RELOC_32, R_byte4_data },
|
||
{ BFD_RELOC_BFIN_11_PCREL, R_pcrel11 },
|
||
{ BFD_RELOC_BFIN_GOT, R_got },
|
||
{ BFD_RELOC_BFIN_PLTPC, R_pltpc },
|
||
|
||
{ BFD_RELOC_BFIN_GOT17M4, R_BFIN_GOT17M4 },
|
||
{ BFD_RELOC_BFIN_GOTHI, R_BFIN_GOTHI },
|
||
{ BFD_RELOC_BFIN_GOTLO, R_BFIN_GOTLO },
|
||
{ BFD_RELOC_BFIN_FUNCDESC, R_BFIN_FUNCDESC },
|
||
{ BFD_RELOC_BFIN_FUNCDESC_GOT17M4, R_BFIN_FUNCDESC_GOT17M4 },
|
||
{ BFD_RELOC_BFIN_FUNCDESC_GOTHI, R_BFIN_FUNCDESC_GOTHI },
|
||
{ BFD_RELOC_BFIN_FUNCDESC_GOTLO, R_BFIN_FUNCDESC_GOTLO },
|
||
{ BFD_RELOC_BFIN_FUNCDESC_VALUE, R_BFIN_FUNCDESC_VALUE },
|
||
{ BFD_RELOC_BFIN_FUNCDESC_GOTOFF17M4, R_BFIN_FUNCDESC_GOTOFF17M4 },
|
||
{ BFD_RELOC_BFIN_FUNCDESC_GOTOFFHI, R_BFIN_FUNCDESC_GOTOFFHI },
|
||
{ BFD_RELOC_BFIN_FUNCDESC_GOTOFFLO, R_BFIN_FUNCDESC_GOTOFFLO },
|
||
{ BFD_RELOC_BFIN_GOTOFF17M4, R_BFIN_GOTOFF17M4 },
|
||
{ BFD_RELOC_BFIN_GOTOFFHI, R_BFIN_GOTOFFHI },
|
||
{ BFD_RELOC_BFIN_GOTOFFLO, R_BFIN_GOTOFFLO },
|
||
|
||
{ BFD_RELOC_VTABLE_INHERIT, R_BFIN_GNU_VTINHERIT },
|
||
{ BFD_RELOC_VTABLE_ENTRY, R_BFIN_GNU_VTENTRY },
|
||
};
|
||
|
||
|
||
static void
|
||
bfin_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
|
||
arelent *cache_ptr,
|
||
Elf_Internal_Rela *dst)
|
||
{
|
||
unsigned int r_type;
|
||
|
||
r_type = ELF32_R_TYPE (dst->r_info);
|
||
|
||
if (r_type <= BFIN_RELOC_MAX)
|
||
cache_ptr->howto = &bfin_howto_table [r_type];
|
||
|
||
else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
|
||
cache_ptr->howto = &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
|
||
|
||
else
|
||
cache_ptr->howto = (reloc_howto_type *) NULL;
|
||
|
||
}
|
||
/* Given a BFD reloc type, return the howto. */
|
||
static reloc_howto_type *
|
||
bfin_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
|
||
bfd_reloc_code_real_type code)
|
||
{
|
||
unsigned int i;
|
||
unsigned int r_type = BFIN_RELOC_MIN;
|
||
|
||
for (i = sizeof (bfin_reloc_map) / sizeof (bfin_reloc_map[0]); --i;)
|
||
if (bfin_reloc_map[i].bfd_reloc_val == code)
|
||
r_type = bfin_reloc_map[i].bfin_reloc_val;
|
||
|
||
if (r_type <= BFIN_RELOC_MAX && r_type > BFIN_RELOC_MIN)
|
||
return &bfin_howto_table [r_type];
|
||
|
||
else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
|
||
return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
|
||
|
||
return (reloc_howto_type *) NULL;
|
||
|
||
}
|
||
/* Given a bfin relocation type, return the howto. */
|
||
static reloc_howto_type *
|
||
bfin_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
|
||
unsigned int r_type)
|
||
{
|
||
if (r_type <= BFIN_RELOC_MAX)
|
||
return &bfin_howto_table [r_type];
|
||
|
||
else if (r_type >= BFIN_GNUEXT_RELOC_MIN && r_type <= BFIN_GNUEXT_RELOC_MAX)
|
||
return &bfin_gnuext_howto_table [r_type - BFIN_GNUEXT_RELOC_MIN];
|
||
|
||
return (reloc_howto_type *) NULL;
|
||
|
||
}
|
||
|
||
/* Return TRUE if the name is a local label.
|
||
bfin local labels begin with L$. */
|
||
static bfd_boolean
|
||
bfin_is_local_label_name (
|
||
bfd *abfd ATTRIBUTE_UNUSED,
|
||
const char *label)
|
||
{
|
||
if (label[0] == 'L' && label[1] == '$' )
|
||
return TRUE;
|
||
|
||
return _bfd_elf_is_local_label_name (abfd, label);
|
||
}
|
||
|
||
extern const bfd_target bfd_elf32_bfinfdpic_vec;
|
||
#define IS_FDPIC(bfd) ((bfd)->xvec == &bfd_elf32_bfinfdpic_vec)
|
||
|
||
/* An extension of the elf hash table data structure, containing some
|
||
additional Blackfin-specific data. */
|
||
struct bfinfdpic_elf_link_hash_table
|
||
{
|
||
struct elf_link_hash_table elf;
|
||
|
||
/* A pointer to the .got section. */
|
||
asection *sgot;
|
||
/* A pointer to the .rel.got section. */
|
||
asection *sgotrel;
|
||
/* A pointer to the .rofixup section. */
|
||
asection *sgotfixup;
|
||
/* A pointer to the .plt section. */
|
||
asection *splt;
|
||
/* A pointer to the .rel.plt section. */
|
||
asection *spltrel;
|
||
/* GOT base offset. */
|
||
bfd_vma got0;
|
||
/* Location of the first non-lazy PLT entry, i.e., the number of
|
||
bytes taken by lazy PLT entries. */
|
||
bfd_vma plt0;
|
||
/* A hash table holding information about which symbols were
|
||
referenced with which PIC-related relocations. */
|
||
struct htab *relocs_info;
|
||
};
|
||
|
||
/* Get the Blackfin ELF linker hash table from a link_info structure. */
|
||
|
||
#define bfinfdpic_hash_table(info) \
|
||
((struct bfinfdpic_elf_link_hash_table *) ((info)->hash))
|
||
|
||
#define bfinfdpic_got_section(info) \
|
||
(bfinfdpic_hash_table (info)->sgot)
|
||
#define bfinfdpic_gotrel_section(info) \
|
||
(bfinfdpic_hash_table (info)->sgotrel)
|
||
#define bfinfdpic_gotfixup_section(info) \
|
||
(bfinfdpic_hash_table (info)->sgotfixup)
|
||
#define bfinfdpic_plt_section(info) \
|
||
(bfinfdpic_hash_table (info)->splt)
|
||
#define bfinfdpic_pltrel_section(info) \
|
||
(bfinfdpic_hash_table (info)->spltrel)
|
||
#define bfinfdpic_relocs_info(info) \
|
||
(bfinfdpic_hash_table (info)->relocs_info)
|
||
#define bfinfdpic_got_initial_offset(info) \
|
||
(bfinfdpic_hash_table (info)->got0)
|
||
#define bfinfdpic_plt_initial_offset(info) \
|
||
(bfinfdpic_hash_table (info)->plt0)
|
||
|
||
/* Create a Blackfin ELF linker hash table. */
|
||
|
||
static struct bfd_link_hash_table *
|
||
bfinfdpic_elf_link_hash_table_create (bfd *abfd)
|
||
{
|
||
struct bfinfdpic_elf_link_hash_table *ret;
|
||
bfd_size_type amt = sizeof (struct bfinfdpic_elf_link_hash_table);
|
||
|
||
ret = bfd_zalloc (abfd, amt);
|
||
if (ret == NULL)
|
||
return NULL;
|
||
|
||
if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
|
||
_bfd_elf_link_hash_newfunc,
|
||
sizeof (struct elf_link_hash_entry)))
|
||
{
|
||
free (ret);
|
||
return NULL;
|
||
}
|
||
|
||
return &ret->elf.root;
|
||
}
|
||
|
||
/* Decide whether a reference to a symbol can be resolved locally or
|
||
not. If the symbol is protected, we want the local address, but
|
||
its function descriptor must be assigned by the dynamic linker. */
|
||
#define BFINFDPIC_SYM_LOCAL(INFO, H) \
|
||
(_bfd_elf_symbol_refs_local_p ((H), (INFO), 1) \
|
||
|| ! elf_hash_table (INFO)->dynamic_sections_created)
|
||
#define BFINFDPIC_FUNCDESC_LOCAL(INFO, H) \
|
||
((H)->dynindx == -1 || ! elf_hash_table (INFO)->dynamic_sections_created)
|
||
|
||
/* This structure collects information on what kind of GOT, PLT or
|
||
function descriptors are required by relocations that reference a
|
||
certain symbol. */
|
||
struct bfinfdpic_relocs_info
|
||
{
|
||
/* The index of the symbol, as stored in the relocation r_info, if
|
||
we have a local symbol; -1 otherwise. */
|
||
long symndx;
|
||
union
|
||
{
|
||
/* The input bfd in which the symbol is defined, if it's a local
|
||
symbol. */
|
||
bfd *abfd;
|
||
/* If symndx == -1, the hash table entry corresponding to a global
|
||
symbol (even if it turns out to bind locally, in which case it
|
||
should ideally be replaced with section's symndx + addend). */
|
||
struct elf_link_hash_entry *h;
|
||
} d;
|
||
/* The addend of the relocation that references the symbol. */
|
||
bfd_vma addend;
|
||
|
||
/* The fields above are used to identify an entry. The fields below
|
||
contain information on how an entry is used and, later on, which
|
||
locations it was assigned. */
|
||
/* The following 2 fields record whether the symbol+addend above was
|
||
ever referenced with a GOT relocation. The 17M4 suffix indicates a
|
||
GOT17M4 relocation; hilo is used for GOTLO/GOTHI pairs. */
|
||
unsigned got17m4:1;
|
||
unsigned gothilo:1;
|
||
/* Whether a FUNCDESC relocation references symbol+addend. */
|
||
unsigned fd:1;
|
||
/* Whether a FUNCDESC_GOT relocation references symbol+addend. */
|
||
unsigned fdgot17m4:1;
|
||
unsigned fdgothilo:1;
|
||
/* Whether a FUNCDESC_GOTOFF relocation references symbol+addend. */
|
||
unsigned fdgoff17m4:1;
|
||
unsigned fdgoffhilo:1;
|
||
/* Whether symbol+addend is referenced with GOTOFF17M4, GOTOFFLO or
|
||
GOTOFFHI relocations. The addend doesn't really matter, since we
|
||
envision that this will only be used to check whether the symbol
|
||
is mapped to the same segment as the got. */
|
||
unsigned gotoff:1;
|
||
/* Whether symbol+addend is referenced by a LABEL24 relocation. */
|
||
unsigned call:1;
|
||
/* Whether symbol+addend is referenced by a 32 or FUNCDESC_VALUE
|
||
relocation. */
|
||
unsigned sym:1;
|
||
/* Whether we need a PLT entry for a symbol. Should be implied by
|
||
something like:
|
||
(call && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)) */
|
||
unsigned plt:1;
|
||
/* Whether a function descriptor should be created in this link unit
|
||
for symbol+addend. Should be implied by something like:
|
||
(plt || fdgotoff17m4 || fdgotofflohi
|
||
|| ((fd || fdgot17m4 || fdgothilo)
|
||
&& (symndx != -1 || BFINFDPIC_FUNCDESC_LOCAL (info, d.h)))) */
|
||
unsigned privfd:1;
|
||
/* Whether a lazy PLT entry is needed for this symbol+addend.
|
||
Should be implied by something like:
|
||
(privfd && symndx == -1 && ! BFINFDPIC_SYM_LOCAL (info, d.h)
|
||
&& ! (info->flags & DF_BIND_NOW)) */
|
||
unsigned lazyplt:1;
|
||
/* Whether we've already emitted GOT relocations and PLT entries as
|
||
needed for this symbol. */
|
||
unsigned done:1;
|
||
|
||
/* The number of R_byte4_data, R_BFIN_FUNCDESC and R_BFIN_FUNCDESC_VALUE
|
||
relocations referencing the symbol. */
|
||
unsigned relocs32, relocsfd, relocsfdv;
|
||
|
||
/* The number of .rofixups entries and dynamic relocations allocated
|
||
for this symbol, minus any that might have already been used. */
|
||
unsigned fixups, dynrelocs;
|
||
|
||
/* The offsets of the GOT entries assigned to symbol+addend, to the
|
||
function descriptor's address, and to a function descriptor,
|
||
respectively. Should be zero if unassigned. The offsets are
|
||
counted from the value that will be assigned to the PIC register,
|
||
not from the beginning of the .got section. */
|
||
bfd_signed_vma got_entry, fdgot_entry, fd_entry;
|
||
/* The offsets of the PLT entries assigned to symbol+addend,
|
||
non-lazy and lazy, respectively. If unassigned, should be
|
||
(bfd_vma)-1. */
|
||
bfd_vma plt_entry, lzplt_entry;
|
||
};
|
||
|
||
/* Compute a hash with the key fields of an bfinfdpic_relocs_info entry. */
|
||
static hashval_t
|
||
bfinfdpic_relocs_info_hash (const void *entry_)
|
||
{
|
||
const struct bfinfdpic_relocs_info *entry = entry_;
|
||
|
||
return (entry->symndx == -1
|
||
? (long) entry->d.h->root.root.hash
|
||
: entry->symndx + (long) entry->d.abfd->id * 257) + entry->addend;
|
||
}
|
||
|
||
/* Test whether the key fields of two bfinfdpic_relocs_info entries are
|
||
identical. */
|
||
static int
|
||
bfinfdpic_relocs_info_eq (const void *entry1, const void *entry2)
|
||
{
|
||
const struct bfinfdpic_relocs_info *e1 = entry1;
|
||
const struct bfinfdpic_relocs_info *e2 = entry2;
|
||
|
||
return e1->symndx == e2->symndx && e1->addend == e2->addend
|
||
&& (e1->symndx == -1 ? e1->d.h == e2->d.h : e1->d.abfd == e2->d.abfd);
|
||
}
|
||
|
||
/* Find or create an entry in a hash table HT that matches the key
|
||
fields of the given ENTRY. If it's not found, memory for a new
|
||
entry is allocated in ABFD's obstack. */
|
||
static struct bfinfdpic_relocs_info *
|
||
bfinfdpic_relocs_info_find (struct htab *ht,
|
||
bfd *abfd,
|
||
const struct bfinfdpic_relocs_info *entry,
|
||
enum insert_option insert)
|
||
{
|
||
struct bfinfdpic_relocs_info **loc =
|
||
(struct bfinfdpic_relocs_info **) htab_find_slot (ht, entry, insert);
|
||
|
||
if (! loc)
|
||
return NULL;
|
||
|
||
if (*loc)
|
||
return *loc;
|
||
|
||
*loc = bfd_zalloc (abfd, sizeof (**loc));
|
||
|
||
if (! *loc)
|
||
return *loc;
|
||
|
||
(*loc)->symndx = entry->symndx;
|
||
(*loc)->d = entry->d;
|
||
(*loc)->addend = entry->addend;
|
||
(*loc)->plt_entry = (bfd_vma)-1;
|
||
(*loc)->lzplt_entry = (bfd_vma)-1;
|
||
|
||
return *loc;
|
||
}
|
||
|
||
/* Obtain the address of the entry in HT associated with H's symbol +
|
||
addend, creating a new entry if none existed. ABFD is only used
|
||
for memory allocation purposes. */
|
||
inline static struct bfinfdpic_relocs_info *
|
||
bfinfdpic_relocs_info_for_global (struct htab *ht,
|
||
bfd *abfd,
|
||
struct elf_link_hash_entry *h,
|
||
bfd_vma addend,
|
||
enum insert_option insert)
|
||
{
|
||
struct bfinfdpic_relocs_info entry;
|
||
|
||
entry.symndx = -1;
|
||
entry.d.h = h;
|
||
entry.addend = addend;
|
||
|
||
return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
|
||
}
|
||
|
||
/* Obtain the address of the entry in HT associated with the SYMNDXth
|
||
local symbol of the input bfd ABFD, plus the addend, creating a new
|
||
entry if none existed. */
|
||
inline static struct bfinfdpic_relocs_info *
|
||
bfinfdpic_relocs_info_for_local (struct htab *ht,
|
||
bfd *abfd,
|
||
long symndx,
|
||
bfd_vma addend,
|
||
enum insert_option insert)
|
||
{
|
||
struct bfinfdpic_relocs_info entry;
|
||
|
||
entry.symndx = symndx;
|
||
entry.d.abfd = abfd;
|
||
entry.addend = addend;
|
||
|
||
return bfinfdpic_relocs_info_find (ht, abfd, &entry, insert);
|
||
}
|
||
|
||
/* Merge fields set by check_relocs() of two entries that end up being
|
||
mapped to the same (presumably global) symbol. */
|
||
|
||
inline static void
|
||
bfinfdpic_pic_merge_early_relocs_info (struct bfinfdpic_relocs_info *e2,
|
||
struct bfinfdpic_relocs_info const *e1)
|
||
{
|
||
e2->got17m4 |= e1->got17m4;
|
||
e2->gothilo |= e1->gothilo;
|
||
e2->fd |= e1->fd;
|
||
e2->fdgot17m4 |= e1->fdgot17m4;
|
||
e2->fdgothilo |= e1->fdgothilo;
|
||
e2->fdgoff17m4 |= e1->fdgoff17m4;
|
||
e2->fdgoffhilo |= e1->fdgoffhilo;
|
||
e2->gotoff |= e1->gotoff;
|
||
e2->call |= e1->call;
|
||
e2->sym |= e1->sym;
|
||
}
|
||
|
||
/* Every block of 65535 lazy PLT entries shares a single call to the
|
||
resolver, inserted in the 32768th lazy PLT entry (i.e., entry #
|
||
32767, counting from 0). All other lazy PLT entries branch to it
|
||
in a single instruction. */
|
||
|
||
#define LZPLT_RESOLVER_EXTRA 10
|
||
#define LZPLT_NORMAL_SIZE 6
|
||
#define LZPLT_ENTRIES 1362
|
||
|
||
#define BFINFDPIC_LZPLT_BLOCK_SIZE ((bfd_vma) LZPLT_NORMAL_SIZE * LZPLT_ENTRIES + LZPLT_RESOLVER_EXTRA)
|
||
#define BFINFDPIC_LZPLT_RESOLV_LOC (LZPLT_NORMAL_SIZE * LZPLT_ENTRIES / 2)
|
||
|
||
/* Add a dynamic relocation to the SRELOC section. */
|
||
|
||
inline static bfd_vma
|
||
_bfinfdpic_add_dyn_reloc (bfd *output_bfd, asection *sreloc, bfd_vma offset,
|
||
int reloc_type, long dynindx, bfd_vma addend,
|
||
struct bfinfdpic_relocs_info *entry)
|
||
{
|
||
Elf_Internal_Rela outrel;
|
||
bfd_vma reloc_offset;
|
||
|
||
outrel.r_offset = offset;
|
||
outrel.r_info = ELF32_R_INFO (dynindx, reloc_type);
|
||
outrel.r_addend = addend;
|
||
|
||
reloc_offset = sreloc->reloc_count * sizeof (Elf32_External_Rel);
|
||
BFD_ASSERT (reloc_offset < sreloc->size);
|
||
bfd_elf32_swap_reloc_out (output_bfd, &outrel,
|
||
sreloc->contents + reloc_offset);
|
||
sreloc->reloc_count++;
|
||
|
||
/* If the entry's index is zero, this relocation was probably to a
|
||
linkonce section that got discarded. We reserved a dynamic
|
||
relocation, but it was for another entry than the one we got at
|
||
the time of emitting the relocation. Unfortunately there's no
|
||
simple way for us to catch this situation, since the relocation
|
||
is cleared right before calling relocate_section, at which point
|
||
we no longer know what the relocation used to point to. */
|
||
if (entry->symndx)
|
||
{
|
||
BFD_ASSERT (entry->dynrelocs > 0);
|
||
entry->dynrelocs--;
|
||
}
|
||
|
||
return reloc_offset;
|
||
}
|
||
|
||
/* Add a fixup to the ROFIXUP section. */
|
||
|
||
static bfd_vma
|
||
_bfinfdpic_add_rofixup (bfd *output_bfd, asection *rofixup, bfd_vma offset,
|
||
struct bfinfdpic_relocs_info *entry)
|
||
{
|
||
bfd_vma fixup_offset;
|
||
|
||
if (rofixup->flags & SEC_EXCLUDE)
|
||
return -1;
|
||
|
||
fixup_offset = rofixup->reloc_count * 4;
|
||
if (rofixup->contents)
|
||
{
|
||
BFD_ASSERT (fixup_offset < rofixup->size);
|
||
bfd_put_32 (output_bfd, offset, rofixup->contents + fixup_offset);
|
||
}
|
||
rofixup->reloc_count++;
|
||
|
||
if (entry && entry->symndx)
|
||
{
|
||
/* See discussion about symndx == 0 in _bfinfdpic_add_dyn_reloc
|
||
above. */
|
||
BFD_ASSERT (entry->fixups > 0);
|
||
entry->fixups--;
|
||
}
|
||
|
||
return fixup_offset;
|
||
}
|
||
|
||
/* Find the segment number in which OSEC, and output section, is
|
||
located. */
|
||
|
||
static unsigned
|
||
_bfinfdpic_osec_to_segment (bfd *output_bfd, asection *osec)
|
||
{
|
||
struct elf_segment_map *m;
|
||
Elf_Internal_Phdr *p;
|
||
|
||
/* Find the segment that contains the output_section. */
|
||
for (m = elf_tdata (output_bfd)->segment_map,
|
||
p = elf_tdata (output_bfd)->phdr;
|
||
m != NULL;
|
||
m = m->next, p++)
|
||
{
|
||
int i;
|
||
|
||
for (i = m->count - 1; i >= 0; i--)
|
||
if (m->sections[i] == osec)
|
||
break;
|
||
|
||
if (i >= 0)
|
||
break;
|
||
}
|
||
|
||
return p - elf_tdata (output_bfd)->phdr;
|
||
}
|
||
|
||
inline static bfd_boolean
|
||
_bfinfdpic_osec_readonly_p (bfd *output_bfd, asection *osec)
|
||
{
|
||
unsigned seg = _bfinfdpic_osec_to_segment (output_bfd, osec);
|
||
|
||
return ! (elf_tdata (output_bfd)->phdr[seg].p_flags & PF_W);
|
||
}
|
||
|
||
/* Generate relocations for GOT entries, function descriptors, and
|
||
code for PLT and lazy PLT entries. */
|
||
|
||
inline static bfd_boolean
|
||
_bfinfdpic_emit_got_relocs_plt_entries (struct bfinfdpic_relocs_info *entry,
|
||
bfd *output_bfd,
|
||
struct bfd_link_info *info,
|
||
asection *sec,
|
||
Elf_Internal_Sym *sym,
|
||
bfd_vma addend)
|
||
|
||
{
|
||
bfd_vma fd_lazy_rel_offset = (bfd_vma)-1;
|
||
int dynindx = -1;
|
||
|
||
if (entry->done)
|
||
return TRUE;
|
||
entry->done = 1;
|
||
|
||
if (entry->got_entry || entry->fdgot_entry || entry->fd_entry)
|
||
{
|
||
/* If the symbol is dynamic, consider it for dynamic
|
||
relocations, otherwise decay to section + offset. */
|
||
if (entry->symndx == -1 && entry->d.h->dynindx != -1)
|
||
dynindx = entry->d.h->dynindx;
|
||
else
|
||
{
|
||
if (sec->output_section
|
||
&& ! bfd_is_abs_section (sec->output_section)
|
||
&& ! bfd_is_und_section (sec->output_section))
|
||
dynindx = elf_section_data (sec->output_section)->dynindx;
|
||
else
|
||
dynindx = 0;
|
||
}
|
||
}
|
||
|
||
/* Generate relocation for GOT entry pointing to the symbol. */
|
||
if (entry->got_entry)
|
||
{
|
||
int idx = dynindx;
|
||
bfd_vma ad = addend;
|
||
|
||
/* If the symbol is dynamic but binds locally, use
|
||
section+offset. */
|
||
if (sec && (entry->symndx != -1
|
||
|| BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
|
||
{
|
||
if (entry->symndx == -1)
|
||
ad += entry->d.h->root.u.def.value;
|
||
else
|
||
ad += sym->st_value;
|
||
ad += sec->output_offset;
|
||
if (sec->output_section && elf_section_data (sec->output_section))
|
||
idx = elf_section_data (sec->output_section)->dynindx;
|
||
else
|
||
idx = 0;
|
||
}
|
||
|
||
/* If we're linking an executable at a fixed address, we can
|
||
omit the dynamic relocation as long as the symbol is local to
|
||
this module. */
|
||
if (info->executable && !info->pie
|
||
&& (entry->symndx != -1
|
||
|| BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
|
||
{
|
||
if (sec)
|
||
ad += sec->output_section->vma;
|
||
if (entry->symndx != -1
|
||
|| entry->d.h->root.type != bfd_link_hash_undefweak)
|
||
_bfinfdpic_add_rofixup (output_bfd,
|
||
bfinfdpic_gotfixup_section (info),
|
||
bfinfdpic_got_section (info)->output_section
|
||
->vma
|
||
+ bfinfdpic_got_section (info)->output_offset
|
||
+ bfinfdpic_got_initial_offset (info)
|
||
+ entry->got_entry, entry);
|
||
}
|
||
else
|
||
_bfinfdpic_add_dyn_reloc (output_bfd, bfinfdpic_gotrel_section (info),
|
||
_bfd_elf_section_offset
|
||
(output_bfd, info,
|
||
bfinfdpic_got_section (info),
|
||
bfinfdpic_got_initial_offset (info)
|
||
+ entry->got_entry)
|
||
+ bfinfdpic_got_section (info)
|
||
->output_section->vma
|
||
+ bfinfdpic_got_section (info)->output_offset,
|
||
R_byte4_data, idx, ad, entry);
|
||
|
||
bfd_put_32 (output_bfd, ad,
|
||
bfinfdpic_got_section (info)->contents
|
||
+ bfinfdpic_got_initial_offset (info)
|
||
+ entry->got_entry);
|
||
}
|
||
|
||
/* Generate relocation for GOT entry pointing to a canonical
|
||
function descriptor. */
|
||
if (entry->fdgot_entry)
|
||
{
|
||
int reloc, idx;
|
||
bfd_vma ad = 0;
|
||
|
||
if (! (entry->symndx == -1
|
||
&& entry->d.h->root.type == bfd_link_hash_undefweak
|
||
&& BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
|
||
{
|
||
/* If the symbol is dynamic and there may be dynamic symbol
|
||
resolution because we are, or are linked with, a shared
|
||
library, emit a FUNCDESC relocation such that the dynamic
|
||
linker will allocate the function descriptor. If the
|
||
symbol needs a non-local function descriptor but binds
|
||
locally (e.g., its visibility is protected, emit a
|
||
dynamic relocation decayed to section+offset. */
|
||
if (entry->symndx == -1
|
||
&& ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)
|
||
&& BFINFDPIC_SYM_LOCAL (info, entry->d.h)
|
||
&& !(info->executable && !info->pie))
|
||
{
|
||
reloc = R_BFIN_FUNCDESC;
|
||
idx = elf_section_data (entry->d.h->root.u.def.section
|
||
->output_section)->dynindx;
|
||
ad = entry->d.h->root.u.def.section->output_offset
|
||
+ entry->d.h->root.u.def.value;
|
||
}
|
||
else if (entry->symndx == -1
|
||
&& ! BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h))
|
||
{
|
||
reloc = R_BFIN_FUNCDESC;
|
||
idx = dynindx;
|
||
ad = addend;
|
||
if (ad)
|
||
return FALSE;
|
||
}
|
||
else
|
||
{
|
||
/* Otherwise, we know we have a private function descriptor,
|
||
so reference it directly. */
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
BFD_ASSERT (entry->privfd);
|
||
reloc = R_byte4_data;
|
||
idx = elf_section_data (bfinfdpic_got_section (info)
|
||
->output_section)->dynindx;
|
||
ad = bfinfdpic_got_section (info)->output_offset
|
||
+ bfinfdpic_got_initial_offset (info) + entry->fd_entry;
|
||
}
|
||
|
||
/* If there is room for dynamic symbol resolution, emit the
|
||
dynamic relocation. However, if we're linking an
|
||
executable at a fixed location, we won't have emitted a
|
||
dynamic symbol entry for the got section, so idx will be
|
||
zero, which means we can and should compute the address
|
||
of the private descriptor ourselves. */
|
||
if (info->executable && !info->pie
|
||
&& (entry->symndx != -1
|
||
|| BFINFDPIC_FUNCDESC_LOCAL (info, entry->d.h)))
|
||
{
|
||
ad += bfinfdpic_got_section (info)->output_section->vma;
|
||
_bfinfdpic_add_rofixup (output_bfd,
|
||
bfinfdpic_gotfixup_section (info),
|
||
bfinfdpic_got_section (info)
|
||
->output_section->vma
|
||
+ bfinfdpic_got_section (info)
|
||
->output_offset
|
||
+ bfinfdpic_got_initial_offset (info)
|
||
+ entry->fdgot_entry, entry);
|
||
}
|
||
else
|
||
_bfinfdpic_add_dyn_reloc (output_bfd,
|
||
bfinfdpic_gotrel_section (info),
|
||
_bfd_elf_section_offset
|
||
(output_bfd, info,
|
||
bfinfdpic_got_section (info),
|
||
bfinfdpic_got_initial_offset (info)
|
||
+ entry->fdgot_entry)
|
||
+ bfinfdpic_got_section (info)
|
||
->output_section->vma
|
||
+ bfinfdpic_got_section (info)
|
||
->output_offset,
|
||
reloc, idx, ad, entry);
|
||
}
|
||
|
||
bfd_put_32 (output_bfd, ad,
|
||
bfinfdpic_got_section (info)->contents
|
||
+ bfinfdpic_got_initial_offset (info)
|
||
+ entry->fdgot_entry);
|
||
}
|
||
|
||
/* Generate relocation to fill in a private function descriptor in
|
||
the GOT. */
|
||
if (entry->fd_entry)
|
||
{
|
||
int idx = dynindx;
|
||
bfd_vma ad = addend;
|
||
bfd_vma ofst;
|
||
long lowword, highword;
|
||
|
||
/* If the symbol is dynamic but binds locally, use
|
||
section+offset. */
|
||
if (sec && (entry->symndx != -1
|
||
|| BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
|
||
{
|
||
if (entry->symndx == -1)
|
||
ad += entry->d.h->root.u.def.value;
|
||
else
|
||
ad += sym->st_value;
|
||
ad += sec->output_offset;
|
||
if (sec->output_section && elf_section_data (sec->output_section))
|
||
idx = elf_section_data (sec->output_section)->dynindx;
|
||
else
|
||
idx = 0;
|
||
}
|
||
|
||
/* If we're linking an executable at a fixed address, we can
|
||
omit the dynamic relocation as long as the symbol is local to
|
||
this module. */
|
||
if (info->executable && !info->pie
|
||
&& (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (info, entry->d.h)))
|
||
{
|
||
if (sec)
|
||
ad += sec->output_section->vma;
|
||
ofst = 0;
|
||
if (entry->symndx != -1
|
||
|| entry->d.h->root.type != bfd_link_hash_undefweak)
|
||
{
|
||
_bfinfdpic_add_rofixup (output_bfd,
|
||
bfinfdpic_gotfixup_section (info),
|
||
bfinfdpic_got_section (info)
|
||
->output_section->vma
|
||
+ bfinfdpic_got_section (info)
|
||
->output_offset
|
||
+ bfinfdpic_got_initial_offset (info)
|
||
+ entry->fd_entry, entry);
|
||
_bfinfdpic_add_rofixup (output_bfd,
|
||
bfinfdpic_gotfixup_section (info),
|
||
bfinfdpic_got_section (info)
|
||
->output_section->vma
|
||
+ bfinfdpic_got_section (info)
|
||
->output_offset
|
||
+ bfinfdpic_got_initial_offset (info)
|
||
+ entry->fd_entry + 4, entry);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
ofst
|
||
= _bfinfdpic_add_dyn_reloc (output_bfd,
|
||
entry->lazyplt
|
||
? bfinfdpic_pltrel_section (info)
|
||
: bfinfdpic_gotrel_section (info),
|
||
_bfd_elf_section_offset
|
||
(output_bfd, info,
|
||
bfinfdpic_got_section (info),
|
||
bfinfdpic_got_initial_offset (info)
|
||
+ entry->fd_entry)
|
||
+ bfinfdpic_got_section (info)
|
||
->output_section->vma
|
||
+ bfinfdpic_got_section (info)
|
||
->output_offset,
|
||
R_BFIN_FUNCDESC_VALUE, idx, ad, entry);
|
||
}
|
||
|
||
/* If we've omitted the dynamic relocation, just emit the fixed
|
||
addresses of the symbol and of the local GOT base offset. */
|
||
if (info->executable && !info->pie && sec && sec->output_section)
|
||
{
|
||
lowword = ad;
|
||
highword = bfinfdpic_got_section (info)->output_section->vma
|
||
+ bfinfdpic_got_section (info)->output_offset
|
||
+ bfinfdpic_got_initial_offset (info);
|
||
}
|
||
else if (entry->lazyplt)
|
||
{
|
||
if (ad)
|
||
return FALSE;
|
||
|
||
fd_lazy_rel_offset = ofst;
|
||
|
||
/* A function descriptor used for lazy or local resolving is
|
||
initialized such that its high word contains the output
|
||
section index in which the PLT entries are located, and
|
||
the low word contains the address of the lazy PLT entry
|
||
entry point, that must be within the memory region
|
||
assigned to that section. */
|
||
lowword = entry->lzplt_entry + 4
|
||
+ bfinfdpic_plt_section (info)->output_offset
|
||
+ bfinfdpic_plt_section (info)->output_section->vma;
|
||
highword = _bfinfdpic_osec_to_segment
|
||
(output_bfd, bfinfdpic_plt_section (info)->output_section);
|
||
}
|
||
else
|
||
{
|
||
/* A function descriptor for a local function gets the index
|
||
of the section. For a non-local function, it's
|
||
disregarded. */
|
||
lowword = ad;
|
||
if (entry->symndx == -1 && entry->d.h->dynindx != -1
|
||
&& entry->d.h->dynindx == idx)
|
||
highword = 0;
|
||
else
|
||
highword = _bfinfdpic_osec_to_segment
|
||
(output_bfd, sec->output_section);
|
||
}
|
||
|
||
bfd_put_32 (output_bfd, lowword,
|
||
bfinfdpic_got_section (info)->contents
|
||
+ bfinfdpic_got_initial_offset (info)
|
||
+ entry->fd_entry);
|
||
bfd_put_32 (output_bfd, highword,
|
||
bfinfdpic_got_section (info)->contents
|
||
+ bfinfdpic_got_initial_offset (info)
|
||
+ entry->fd_entry + 4);
|
||
}
|
||
|
||
/* Generate code for the PLT entry. */
|
||
if (entry->plt_entry != (bfd_vma) -1)
|
||
{
|
||
bfd_byte *plt_code = bfinfdpic_plt_section (info)->contents
|
||
+ entry->plt_entry;
|
||
|
||
BFD_ASSERT (entry->fd_entry);
|
||
|
||
/* Figure out what kind of PLT entry we need, depending on the
|
||
location of the function descriptor within the GOT. */
|
||
if (entry->fd_entry >= -(1 << (18 - 1))
|
||
&& entry->fd_entry + 4 < (1 << (18 - 1)))
|
||
{
|
||
/* P1 = [P3 + fd_entry]; P3 = [P3 + fd_entry + 4] */
|
||
bfd_put_32 (output_bfd,
|
||
0xe519 | ((entry->fd_entry << 14) & 0xFFFF0000),
|
||
plt_code);
|
||
bfd_put_32 (output_bfd,
|
||
0xe51b | (((entry->fd_entry + 4) << 14) & 0xFFFF0000),
|
||
plt_code + 4);
|
||
plt_code += 8;
|
||
}
|
||
else
|
||
{
|
||
/* P1.L = fd_entry; P1.H = fd_entry;
|
||
P3 = P3 + P1;
|
||
P1 = [P3];
|
||
P3 = [P3 + 4]; */
|
||
bfd_put_32 (output_bfd,
|
||
0xe109 | (entry->fd_entry << 16),
|
||
plt_code);
|
||
bfd_put_32 (output_bfd,
|
||
0xe149 | (entry->fd_entry & 0xFFFF0000),
|
||
plt_code + 4);
|
||
bfd_put_16 (output_bfd, 0x5ad9, plt_code + 8);
|
||
bfd_put_16 (output_bfd, 0x9159, plt_code + 10);
|
||
bfd_put_16 (output_bfd, 0xac5b, plt_code + 12);
|
||
plt_code += 14;
|
||
}
|
||
/* JUMP (P1) */
|
||
bfd_put_16 (output_bfd, 0x0051, plt_code);
|
||
}
|
||
|
||
/* Generate code for the lazy PLT entry. */
|
||
if (entry->lzplt_entry != (bfd_vma) -1)
|
||
{
|
||
bfd_byte *lzplt_code = bfinfdpic_plt_section (info)->contents
|
||
+ entry->lzplt_entry;
|
||
bfd_vma resolverStub_addr;
|
||
|
||
bfd_put_32 (output_bfd, fd_lazy_rel_offset, lzplt_code);
|
||
lzplt_code += 4;
|
||
|
||
resolverStub_addr = entry->lzplt_entry / BFINFDPIC_LZPLT_BLOCK_SIZE
|
||
* BFINFDPIC_LZPLT_BLOCK_SIZE + BFINFDPIC_LZPLT_RESOLV_LOC;
|
||
if (resolverStub_addr >= bfinfdpic_plt_initial_offset (info))
|
||
resolverStub_addr = bfinfdpic_plt_initial_offset (info) - LZPLT_NORMAL_SIZE - LZPLT_RESOLVER_EXTRA;
|
||
|
||
if (entry->lzplt_entry == resolverStub_addr)
|
||
{
|
||
/* This is a lazy PLT entry that includes a resolver call.
|
||
P2 = [P3];
|
||
R3 = [P3 + 4];
|
||
JUMP (P2); */
|
||
bfd_put_32 (output_bfd,
|
||
0xa05b915a,
|
||
lzplt_code);
|
||
bfd_put_16 (output_bfd, 0x0052, lzplt_code + 4);
|
||
}
|
||
else
|
||
{
|
||
/* JUMP.S resolverStub */
|
||
bfd_put_16 (output_bfd,
|
||
0x2000
|
||
| (((resolverStub_addr - entry->lzplt_entry)
|
||
/ 2) & (((bfd_vma)1 << 12) - 1)),
|
||
lzplt_code);
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
|
||
/* Look through the relocs for a section during the first phase, and
|
||
allocate space in the global offset table or procedure linkage
|
||
table. */
|
||
|
||
static bfd_boolean
|
||
bfin_check_relocs (bfd * abfd,
|
||
struct bfd_link_info *info,
|
||
asection *sec,
|
||
const Elf_Internal_Rela *relocs)
|
||
{
|
||
bfd *dynobj;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
bfd_signed_vma *local_got_refcounts;
|
||
const Elf_Internal_Rela *rel;
|
||
const Elf_Internal_Rela *rel_end;
|
||
asection *sgot;
|
||
asection *srelgot;
|
||
asection *sreloc;
|
||
if (info->relocatable)
|
||
return TRUE;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (abfd);
|
||
local_got_refcounts = elf_local_got_refcounts (abfd);
|
||
|
||
sgot = NULL;
|
||
srelgot = NULL;
|
||
sreloc = NULL;
|
||
|
||
rel_end = relocs + sec->reloc_count;
|
||
for (rel = relocs; rel < rel_end; rel++)
|
||
{
|
||
unsigned long r_symndx;
|
||
struct elf_link_hash_entry *h;
|
||
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
h = NULL;
|
||
else
|
||
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
||
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
/* This relocation describes the C++ object vtable hierarchy.
|
||
Reconstruct it for later use during GC. */
|
||
case R_BFIN_GNU_VTINHERIT:
|
||
if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
||
return FALSE;
|
||
break;
|
||
|
||
/* This relocation describes which C++ vtable entries
|
||
are actually used. Record for later use during GC. */
|
||
case R_BFIN_GNU_VTENTRY:
|
||
if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
||
return FALSE;
|
||
break;
|
||
|
||
case R_got:
|
||
if (h != NULL
|
||
&& strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
|
||
break;
|
||
/* Fall through. */
|
||
|
||
if (dynobj == NULL)
|
||
{
|
||
/* Create the .got section. */
|
||
elf_hash_table (info)->dynobj = dynobj = abfd;
|
||
if (!_bfd_elf_create_got_section (dynobj, info))
|
||
return FALSE;
|
||
}
|
||
|
||
if (sgot == NULL)
|
||
{
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
BFD_ASSERT (sgot != NULL);
|
||
}
|
||
|
||
if (srelgot == NULL && (h != NULL || info->shared))
|
||
{
|
||
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
if (srelgot == NULL)
|
||
{
|
||
srelgot = bfd_make_section (dynobj, ".rela.got");
|
||
if (srelgot == NULL
|
||
|| !bfd_set_section_flags (dynobj, srelgot,
|
||
(SEC_ALLOC
|
||
| SEC_LOAD
|
||
| SEC_HAS_CONTENTS
|
||
| SEC_IN_MEMORY
|
||
| SEC_LINKER_CREATED
|
||
| SEC_READONLY))
|
||
|| !bfd_set_section_alignment (dynobj, srelgot, 2))
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
if (h != NULL)
|
||
{
|
||
if (h->got.refcount == 0)
|
||
{
|
||
/* Make sure this symbol is output as a dynamic symbol. */
|
||
if (h->dynindx == -1 && !h->forced_local)
|
||
{
|
||
if (!bfd_elf_link_record_dynamic_symbol (info, h))
|
||
return FALSE;
|
||
}
|
||
|
||
/* Allocate space in the .got section. */
|
||
sgot->size += 4;
|
||
/* Allocate relocation space. */
|
||
srelgot->size += sizeof (Elf32_External_Rela);
|
||
}
|
||
h->got.refcount++;
|
||
}
|
||
else
|
||
{
|
||
/* This is a global offset table entry for a local symbol. */
|
||
if (local_got_refcounts == NULL)
|
||
{
|
||
bfd_size_type size;
|
||
|
||
size = symtab_hdr->sh_info;
|
||
size *= sizeof (bfd_signed_vma);
|
||
local_got_refcounts = ((bfd_signed_vma *)
|
||
bfd_zalloc (abfd, size));
|
||
if (local_got_refcounts == NULL)
|
||
return FALSE;
|
||
elf_local_got_refcounts (abfd) = local_got_refcounts;
|
||
}
|
||
if (local_got_refcounts[r_symndx] == 0)
|
||
{
|
||
sgot->size += 4;
|
||
if (info->shared)
|
||
{
|
||
/* If we are generating a shared object, we need to
|
||
output a R_68K_RELATIVE reloc so that the dynamic
|
||
linker can adjust this GOT entry. */
|
||
srelgot->size += sizeof (Elf32_External_Rela);
|
||
}
|
||
}
|
||
local_got_refcounts[r_symndx]++;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
static enum elf_reloc_type_class
|
||
elf32_bfin_reloc_type_class (const Elf_Internal_Rela * rela)
|
||
{
|
||
switch ((int) ELF32_R_TYPE (rela->r_info))
|
||
{
|
||
default:
|
||
return reloc_class_normal;
|
||
}
|
||
}
|
||
|
||
/* Relocate an Blackfin ELF section.
|
||
|
||
The RELOCATE_SECTION function is called by the new ELF backend linker
|
||
to handle the relocations for a section.
|
||
|
||
The relocs are always passed as Rela structures; if the section
|
||
actually uses Rel structures, the r_addend field will always be
|
||
zero.
|
||
|
||
This function is responsible for adjusting the section contents as
|
||
necessary, and (if using Rela relocs and generating a relocatable
|
||
output file) adjusting the reloc addend as necessary.
|
||
|
||
This function does not have to worry about setting the reloc
|
||
address or the reloc symbol index.
|
||
|
||
LOCAL_SYMS is a pointer to the swapped in local symbols.
|
||
|
||
LOCAL_SECTIONS is an array giving the section in the input file
|
||
corresponding to the st_shndx field of each local symbol.
|
||
|
||
The global hash table entry for the global symbols can be found
|
||
via elf_sym_hashes (input_bfd).
|
||
|
||
When generating relocatable output, this function must handle
|
||
STB_LOCAL/STT_SECTION symbols specially. The output symbol is
|
||
going to be the section symbol corresponding to the output
|
||
section, which means that the addend must be adjusted
|
||
accordingly. */
|
||
|
||
static bfd_boolean
|
||
bfinfdpic_relocate_section (bfd * output_bfd,
|
||
struct bfd_link_info *info,
|
||
bfd * input_bfd,
|
||
asection * input_section,
|
||
bfd_byte * contents,
|
||
Elf_Internal_Rela * relocs,
|
||
Elf_Internal_Sym * local_syms,
|
||
asection ** local_sections)
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
Elf_Internal_Rela *rel;
|
||
Elf_Internal_Rela *relend;
|
||
unsigned isec_segment, got_segment, plt_segment,
|
||
check_segment[2];
|
||
int silence_segment_error = !(info->shared || info->pie);
|
||
|
||
if (info->relocatable)
|
||
return TRUE;
|
||
|
||
symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (input_bfd);
|
||
relend = relocs + input_section->reloc_count;
|
||
|
||
isec_segment = _bfinfdpic_osec_to_segment (output_bfd,
|
||
input_section->output_section);
|
||
if (IS_FDPIC (output_bfd) && bfinfdpic_got_section (info))
|
||
got_segment = _bfinfdpic_osec_to_segment (output_bfd,
|
||
bfinfdpic_got_section (info)
|
||
->output_section);
|
||
else
|
||
got_segment = -1;
|
||
if (IS_FDPIC (output_bfd) && elf_hash_table (info)->dynamic_sections_created)
|
||
plt_segment = _bfinfdpic_osec_to_segment (output_bfd,
|
||
bfinfdpic_plt_section (info)
|
||
->output_section);
|
||
else
|
||
plt_segment = -1;
|
||
|
||
for (rel = relocs; rel < relend; rel ++)
|
||
{
|
||
reloc_howto_type *howto;
|
||
unsigned long r_symndx;
|
||
Elf_Internal_Sym *sym;
|
||
asection *sec;
|
||
struct elf_link_hash_entry *h;
|
||
bfd_vma relocation;
|
||
bfd_reloc_status_type r;
|
||
const char * name = NULL;
|
||
int r_type;
|
||
asection *osec;
|
||
struct bfinfdpic_relocs_info *picrel;
|
||
bfd_vma orig_addend = rel->r_addend;
|
||
|
||
r_type = ELF32_R_TYPE (rel->r_info);
|
||
|
||
if (r_type == R_BFIN_GNU_VTINHERIT
|
||
|| r_type == R_BFIN_GNU_VTENTRY)
|
||
continue;
|
||
|
||
/* This is a final link. */
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
howto = bfin_reloc_type_lookup (input_bfd, r_type);
|
||
if (howto == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
|
||
h = NULL;
|
||
sym = NULL;
|
||
sec = NULL;
|
||
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
{
|
||
sym = local_syms + r_symndx;
|
||
osec = sec = local_sections [r_symndx];
|
||
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
|
||
|
||
name = bfd_elf_string_from_elf_section
|
||
(input_bfd, symtab_hdr->sh_link, sym->st_name);
|
||
name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
|
||
}
|
||
else
|
||
{
|
||
h = sym_hashes [r_symndx - symtab_hdr->sh_info];
|
||
|
||
while (h->root.type == bfd_link_hash_indirect
|
||
|| h->root.type == bfd_link_hash_warning)
|
||
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
||
|
||
name = h->root.root.string;
|
||
|
||
if ((h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
&& ! BFINFDPIC_SYM_LOCAL (info, h))
|
||
{
|
||
sec = NULL;
|
||
relocation = 0;
|
||
}
|
||
else
|
||
if (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
{
|
||
sec = h->root.u.def.section;
|
||
relocation = (h->root.u.def.value
|
||
+ sec->output_section->vma
|
||
+ sec->output_offset);
|
||
}
|
||
else if (h->root.type == bfd_link_hash_undefweak)
|
||
{
|
||
relocation = 0;
|
||
}
|
||
else if (info->unresolved_syms_in_objects == RM_IGNORE
|
||
&& ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
|
||
relocation = 0;
|
||
else
|
||
{
|
||
if (! ((*info->callbacks->undefined_symbol)
|
||
(info, h->root.root.string, input_bfd,
|
||
input_section, rel->r_offset,
|
||
(info->unresolved_syms_in_objects == RM_GENERATE_ERROR
|
||
|| ELF_ST_VISIBILITY (h->other)))))
|
||
return FALSE;
|
||
relocation = 0;
|
||
}
|
||
osec = sec;
|
||
}
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_pcrel24:
|
||
case R_pcrel24_jump_l:
|
||
case R_byte4_data:
|
||
if (! IS_FDPIC (output_bfd))
|
||
goto non_fdpic;
|
||
|
||
case R_BFIN_GOT17M4:
|
||
case R_BFIN_GOTHI:
|
||
case R_BFIN_GOTLO:
|
||
case R_BFIN_FUNCDESC_GOT17M4:
|
||
case R_BFIN_FUNCDESC_GOTHI:
|
||
case R_BFIN_FUNCDESC_GOTLO:
|
||
case R_BFIN_GOTOFF17M4:
|
||
case R_BFIN_GOTOFFHI:
|
||
case R_BFIN_GOTOFFLO:
|
||
case R_BFIN_FUNCDESC_GOTOFF17M4:
|
||
case R_BFIN_FUNCDESC_GOTOFFHI:
|
||
case R_BFIN_FUNCDESC_GOTOFFLO:
|
||
case R_BFIN_FUNCDESC:
|
||
case R_BFIN_FUNCDESC_VALUE:
|
||
if (h != NULL)
|
||
picrel = bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info
|
||
(info), input_bfd, h,
|
||
orig_addend, INSERT);
|
||
else
|
||
/* In order to find the entry we created before, we must
|
||
use the original addend, not the one that may have been
|
||
modified by _bfd_elf_rela_local_sym(). */
|
||
picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
|
||
(info), input_bfd, r_symndx,
|
||
orig_addend, INSERT);
|
||
if (! picrel)
|
||
return FALSE;
|
||
|
||
if (!_bfinfdpic_emit_got_relocs_plt_entries (picrel, output_bfd, info,
|
||
osec, sym,
|
||
rel->r_addend))
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("%B: relocation at `%A+0x%x' references symbol `%s' with nonzero addend"),
|
||
input_bfd, input_section, rel->r_offset, name);
|
||
return FALSE;
|
||
|
||
}
|
||
|
||
break;
|
||
|
||
default:
|
||
non_fdpic:
|
||
picrel = NULL;
|
||
if (h && ! BFINFDPIC_SYM_LOCAL (info, h))
|
||
{
|
||
info->callbacks->warning
|
||
(info, _("relocation references symbol not defined in the module"),
|
||
name, input_bfd, input_section, rel->r_offset);
|
||
return FALSE;
|
||
}
|
||
break;
|
||
}
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_pcrel24:
|
||
case R_pcrel24_jump_l:
|
||
check_segment[0] = isec_segment;
|
||
if (! IS_FDPIC (output_bfd))
|
||
check_segment[1] = isec_segment;
|
||
else if (picrel->plt)
|
||
{
|
||
relocation = bfinfdpic_plt_section (info)->output_section->vma
|
||
+ bfinfdpic_plt_section (info)->output_offset
|
||
+ picrel->plt_entry;
|
||
check_segment[1] = plt_segment;
|
||
}
|
||
/* We don't want to warn on calls to undefined weak symbols,
|
||
as calls to them must be protected by non-NULL tests
|
||
anyway, and unprotected calls would invoke undefined
|
||
behavior. */
|
||
else if (picrel->symndx == -1
|
||
&& picrel->d.h->root.type == bfd_link_hash_undefweak)
|
||
check_segment[1] = check_segment[0];
|
||
else
|
||
check_segment[1] = sec
|
||
? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
|
||
: (unsigned)-1;
|
||
break;
|
||
|
||
case R_BFIN_GOT17M4:
|
||
case R_BFIN_GOTHI:
|
||
case R_BFIN_GOTLO:
|
||
relocation = picrel->got_entry;
|
||
check_segment[0] = check_segment[1] = got_segment;
|
||
break;
|
||
|
||
case R_BFIN_FUNCDESC_GOT17M4:
|
||
case R_BFIN_FUNCDESC_GOTHI:
|
||
case R_BFIN_FUNCDESC_GOTLO:
|
||
relocation = picrel->fdgot_entry;
|
||
check_segment[0] = check_segment[1] = got_segment;
|
||
break;
|
||
|
||
case R_BFIN_GOTOFFHI:
|
||
case R_BFIN_GOTOFF17M4:
|
||
case R_BFIN_GOTOFFLO:
|
||
relocation -= bfinfdpic_got_section (info)->output_section->vma
|
||
+ bfinfdpic_got_section (info)->output_offset
|
||
+ bfinfdpic_got_initial_offset (info);
|
||
check_segment[0] = got_segment;
|
||
check_segment[1] = sec
|
||
? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
|
||
: (unsigned)-1;
|
||
break;
|
||
|
||
case R_BFIN_FUNCDESC_GOTOFF17M4:
|
||
case R_BFIN_FUNCDESC_GOTOFFHI:
|
||
case R_BFIN_FUNCDESC_GOTOFFLO:
|
||
relocation = picrel->fd_entry;
|
||
check_segment[0] = check_segment[1] = got_segment;
|
||
break;
|
||
|
||
case R_BFIN_FUNCDESC:
|
||
{
|
||
int dynindx;
|
||
bfd_vma addend = rel->r_addend;
|
||
|
||
if (! (h && h->root.type == bfd_link_hash_undefweak
|
||
&& BFINFDPIC_SYM_LOCAL (info, h)))
|
||
{
|
||
/* If the symbol is dynamic and there may be dynamic
|
||
symbol resolution because we are or are linked with a
|
||
shared library, emit a FUNCDESC relocation such that
|
||
the dynamic linker will allocate the function
|
||
descriptor. If the symbol needs a non-local function
|
||
descriptor but binds locally (e.g., its visibility is
|
||
protected, emit a dynamic relocation decayed to
|
||
section+offset. */
|
||
if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h)
|
||
&& BFINFDPIC_SYM_LOCAL (info, h)
|
||
&& !(info->executable && !info->pie))
|
||
{
|
||
dynindx = elf_section_data (h->root.u.def.section
|
||
->output_section)->dynindx;
|
||
addend += h->root.u.def.section->output_offset
|
||
+ h->root.u.def.value;
|
||
}
|
||
else if (h && ! BFINFDPIC_FUNCDESC_LOCAL (info, h))
|
||
{
|
||
if (addend)
|
||
{
|
||
info->callbacks->warning
|
||
(info, _("R_BFIN_FUNCDESC references dynamic symbol with nonzero addend"),
|
||
name, input_bfd, input_section, rel->r_offset);
|
||
return FALSE;
|
||
}
|
||
dynindx = h->dynindx;
|
||
}
|
||
else
|
||
{
|
||
/* Otherwise, we know we have a private function
|
||
descriptor, so reference it directly. */
|
||
BFD_ASSERT (picrel->privfd);
|
||
r_type = R_byte4_data;
|
||
dynindx = elf_section_data (bfinfdpic_got_section (info)
|
||
->output_section)->dynindx;
|
||
addend = bfinfdpic_got_section (info)->output_offset
|
||
+ bfinfdpic_got_initial_offset (info)
|
||
+ picrel->fd_entry;
|
||
}
|
||
|
||
/* If there is room for dynamic symbol resolution, emit
|
||
the dynamic relocation. However, if we're linking an
|
||
executable at a fixed location, we won't have emitted a
|
||
dynamic symbol entry for the got section, so idx will
|
||
be zero, which means we can and should compute the
|
||
address of the private descriptor ourselves. */
|
||
if (info->executable && !info->pie
|
||
&& (!h || BFINFDPIC_FUNCDESC_LOCAL (info, h)))
|
||
{
|
||
addend += bfinfdpic_got_section (info)->output_section->vma;
|
||
if ((bfd_get_section_flags (output_bfd,
|
||
input_section->output_section)
|
||
& (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
|
||
{
|
||
if (_bfinfdpic_osec_readonly_p (output_bfd,
|
||
input_section
|
||
->output_section))
|
||
{
|
||
info->callbacks->warning
|
||
(info,
|
||
_("cannot emit fixups in read-only section"),
|
||
name, input_bfd, input_section, rel->r_offset);
|
||
return FALSE;
|
||
}
|
||
_bfinfdpic_add_rofixup (output_bfd,
|
||
bfinfdpic_gotfixup_section
|
||
(info),
|
||
_bfd_elf_section_offset
|
||
(output_bfd, info,
|
||
input_section, rel->r_offset)
|
||
+ input_section
|
||
->output_section->vma
|
||
+ input_section->output_offset,
|
||
picrel);
|
||
}
|
||
}
|
||
else if ((bfd_get_section_flags (output_bfd,
|
||
input_section->output_section)
|
||
& (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
|
||
{
|
||
if (_bfinfdpic_osec_readonly_p (output_bfd,
|
||
input_section
|
||
->output_section))
|
||
{
|
||
info->callbacks->warning
|
||
(info,
|
||
_("cannot emit dynamic relocations in read-only section"),
|
||
name, input_bfd, input_section, rel->r_offset);
|
||
return FALSE;
|
||
}
|
||
_bfinfdpic_add_dyn_reloc (output_bfd,
|
||
bfinfdpic_gotrel_section (info),
|
||
_bfd_elf_section_offset
|
||
(output_bfd, info,
|
||
input_section, rel->r_offset)
|
||
+ input_section
|
||
->output_section->vma
|
||
+ input_section->output_offset,
|
||
r_type, dynindx, addend, picrel);
|
||
}
|
||
else
|
||
addend += bfinfdpic_got_section (info)->output_section->vma;
|
||
}
|
||
|
||
/* We want the addend in-place because dynamic
|
||
relocations are REL. Setting relocation to it should
|
||
arrange for it to be installed. */
|
||
relocation = addend - rel->r_addend;
|
||
}
|
||
check_segment[0] = check_segment[1] = got_segment;
|
||
break;
|
||
|
||
case R_byte4_data:
|
||
if (! IS_FDPIC (output_bfd))
|
||
{
|
||
check_segment[0] = check_segment[1] = -1;
|
||
break;
|
||
}
|
||
/* Fall through. */
|
||
case R_BFIN_FUNCDESC_VALUE:
|
||
{
|
||
int dynindx;
|
||
bfd_vma addend = rel->r_addend;
|
||
|
||
/* If the symbol is dynamic but binds locally, use
|
||
section+offset. */
|
||
if (h && ! BFINFDPIC_SYM_LOCAL (info, h))
|
||
{
|
||
if (addend && r_type == R_BFIN_FUNCDESC_VALUE)
|
||
{
|
||
info->callbacks->warning
|
||
(info, _("R_BFIN_FUNCDESC_VALUE references dynamic symbol with nonzero addend"),
|
||
name, input_bfd, input_section, rel->r_offset);
|
||
return FALSE;
|
||
}
|
||
dynindx = h->dynindx;
|
||
}
|
||
else
|
||
{
|
||
if (h)
|
||
addend += h->root.u.def.value;
|
||
else
|
||
addend += sym->st_value;
|
||
if (osec)
|
||
addend += osec->output_offset;
|
||
if (osec && osec->output_section
|
||
&& ! bfd_is_abs_section (osec->output_section)
|
||
&& ! bfd_is_und_section (osec->output_section))
|
||
dynindx = elf_section_data (osec->output_section)->dynindx;
|
||
else
|
||
dynindx = 0;
|
||
}
|
||
|
||
/* If we're linking an executable at a fixed address, we
|
||
can omit the dynamic relocation as long as the symbol
|
||
is defined in the current link unit (which is implied
|
||
by its output section not being NULL). */
|
||
if (info->executable && !info->pie
|
||
&& (!h || BFINFDPIC_SYM_LOCAL (info, h)))
|
||
{
|
||
if (osec)
|
||
addend += osec->output_section->vma;
|
||
if (IS_FDPIC (input_bfd)
|
||
&& (bfd_get_section_flags (output_bfd,
|
||
input_section->output_section)
|
||
& (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
|
||
{
|
||
if (_bfinfdpic_osec_readonly_p (output_bfd,
|
||
input_section
|
||
->output_section))
|
||
{
|
||
info->callbacks->warning
|
||
(info,
|
||
_("cannot emit fixups in read-only section"),
|
||
name, input_bfd, input_section, rel->r_offset);
|
||
return FALSE;
|
||
}
|
||
if (!h || h->root.type != bfd_link_hash_undefweak)
|
||
{
|
||
_bfinfdpic_add_rofixup (output_bfd,
|
||
bfinfdpic_gotfixup_section
|
||
(info),
|
||
_bfd_elf_section_offset
|
||
(output_bfd, info,
|
||
input_section, rel->r_offset)
|
||
+ input_section
|
||
->output_section->vma
|
||
+ input_section->output_offset,
|
||
picrel);
|
||
if (r_type == R_BFIN_FUNCDESC_VALUE)
|
||
_bfinfdpic_add_rofixup
|
||
(output_bfd,
|
||
bfinfdpic_gotfixup_section (info),
|
||
_bfd_elf_section_offset
|
||
(output_bfd, info,
|
||
input_section, rel->r_offset)
|
||
+ input_section->output_section->vma
|
||
+ input_section->output_offset + 4, picrel);
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if ((bfd_get_section_flags (output_bfd,
|
||
input_section->output_section)
|
||
& (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
|
||
{
|
||
if (_bfinfdpic_osec_readonly_p (output_bfd,
|
||
input_section
|
||
->output_section))
|
||
{
|
||
info->callbacks->warning
|
||
(info,
|
||
_("cannot emit dynamic relocations in read-only section"),
|
||
name, input_bfd, input_section, rel->r_offset);
|
||
return FALSE;
|
||
}
|
||
_bfinfdpic_add_dyn_reloc (output_bfd,
|
||
bfinfdpic_gotrel_section (info),
|
||
_bfd_elf_section_offset
|
||
(output_bfd, info,
|
||
input_section, rel->r_offset)
|
||
+ input_section
|
||
->output_section->vma
|
||
+ input_section->output_offset,
|
||
r_type, dynindx, addend, picrel);
|
||
}
|
||
else if (osec)
|
||
addend += osec->output_section->vma;
|
||
/* We want the addend in-place because dynamic
|
||
relocations are REL. Setting relocation to it
|
||
should arrange for it to be installed. */
|
||
relocation = addend - rel->r_addend;
|
||
}
|
||
|
||
if (r_type == R_BFIN_FUNCDESC_VALUE)
|
||
{
|
||
/* If we've omitted the dynamic relocation, just emit
|
||
the fixed addresses of the symbol and of the local
|
||
GOT base offset. */
|
||
if (info->executable && !info->pie
|
||
&& (!h || BFINFDPIC_SYM_LOCAL (info, h)))
|
||
bfd_put_32 (output_bfd,
|
||
bfinfdpic_got_section (info)->output_section->vma
|
||
+ bfinfdpic_got_section (info)->output_offset
|
||
+ bfinfdpic_got_initial_offset (info),
|
||
contents + rel->r_offset + 4);
|
||
else
|
||
/* A function descriptor used for lazy or local
|
||
resolving is initialized such that its high word
|
||
contains the output section index in which the
|
||
PLT entries are located, and the low word
|
||
contains the offset of the lazy PLT entry entry
|
||
point into that section. */
|
||
bfd_put_32 (output_bfd,
|
||
h && ! BFINFDPIC_SYM_LOCAL (info, h)
|
||
? 0
|
||
: _bfinfdpic_osec_to_segment (output_bfd,
|
||
sec
|
||
->output_section),
|
||
contents + rel->r_offset + 4);
|
||
}
|
||
}
|
||
check_segment[0] = check_segment[1] = got_segment;
|
||
break;
|
||
|
||
default:
|
||
check_segment[0] = isec_segment;
|
||
check_segment[1] = sec
|
||
? _bfinfdpic_osec_to_segment (output_bfd, sec->output_section)
|
||
: (unsigned)-1;
|
||
break;
|
||
}
|
||
|
||
if (check_segment[0] != check_segment[1] && IS_FDPIC (output_bfd))
|
||
{
|
||
#if 1 /* If you take this out, remove the #error from fdpic-static-6.d
|
||
in the ld testsuite. */
|
||
/* This helps catch problems in GCC while we can't do more
|
||
than static linking. The idea is to test whether the
|
||
input file basename is crt0.o only once. */
|
||
if (silence_segment_error == 1)
|
||
silence_segment_error =
|
||
(strlen (input_bfd->filename) == 6
|
||
&& strcmp (input_bfd->filename, "crt0.o") == 0)
|
||
|| (strlen (input_bfd->filename) > 6
|
||
&& strcmp (input_bfd->filename
|
||
+ strlen (input_bfd->filename) - 7,
|
||
"/crt0.o") == 0)
|
||
? -1 : 0;
|
||
#endif
|
||
if (!silence_segment_error
|
||
/* We don't want duplicate errors for undefined
|
||
symbols. */
|
||
&& !(picrel && picrel->symndx == -1
|
||
&& picrel->d.h->root.type == bfd_link_hash_undefined))
|
||
info->callbacks->warning
|
||
(info,
|
||
(info->shared || info->pie)
|
||
? _("relocations between different segments are not supported")
|
||
: _("warning: relocation references a different segment"),
|
||
name, input_bfd, input_section, rel->r_offset);
|
||
if (!silence_segment_error && (info->shared || info->pie))
|
||
return FALSE;
|
||
elf_elfheader (output_bfd)->e_flags |= EF_BFIN_PIC;
|
||
}
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_BFIN_GOTOFFHI:
|
||
/* We need the addend to be applied before we shift the
|
||
value right. */
|
||
relocation += rel->r_addend;
|
||
/* Fall through. */
|
||
case R_BFIN_GOTHI:
|
||
case R_BFIN_FUNCDESC_GOTHI:
|
||
case R_BFIN_FUNCDESC_GOTOFFHI:
|
||
relocation >>= 16;
|
||
/* Fall through. */
|
||
|
||
case R_BFIN_GOTLO:
|
||
case R_BFIN_FUNCDESC_GOTLO:
|
||
case R_BFIN_GOTOFFLO:
|
||
case R_BFIN_FUNCDESC_GOTOFFLO:
|
||
relocation &= 0xffff;
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
switch (r_type)
|
||
{
|
||
case R_pcrel24:
|
||
case R_pcrel24_jump_l:
|
||
if (! IS_FDPIC (output_bfd) || ! picrel->plt)
|
||
break;
|
||
/* Fall through. */
|
||
|
||
/* When referencing a GOT entry, a function descriptor or a
|
||
PLT, we don't want the addend to apply to the reference,
|
||
but rather to the referenced symbol. The actual entry
|
||
will have already been created taking the addend into
|
||
account, so cancel it out here. */
|
||
case R_BFIN_GOT17M4:
|
||
case R_BFIN_GOTHI:
|
||
case R_BFIN_GOTLO:
|
||
case R_BFIN_FUNCDESC_GOT17M4:
|
||
case R_BFIN_FUNCDESC_GOTHI:
|
||
case R_BFIN_FUNCDESC_GOTLO:
|
||
case R_BFIN_FUNCDESC_GOTOFF17M4:
|
||
case R_BFIN_FUNCDESC_GOTOFFHI:
|
||
case R_BFIN_FUNCDESC_GOTOFFLO:
|
||
/* Note that we only want GOTOFFHI, not GOTOFFLO or GOTOFF17M4
|
||
here, since we do want to apply the addend to the others.
|
||
Note that we've applied the addend to GOTOFFHI before we
|
||
shifted it right. */
|
||
case R_BFIN_GOTOFFHI:
|
||
relocation -= rel->r_addend;
|
||
break;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
|
||
if (r_type == R_pcrel24
|
||
|| r_type == R_pcrel24_jump_l)
|
||
{
|
||
bfd_vma x;
|
||
bfd_vma address = rel->r_offset;
|
||
|
||
relocation += rel->r_addend;
|
||
|
||
/* Perform usual pc-relative correction. */
|
||
relocation -= input_section->output_section->vma + input_section->output_offset;
|
||
relocation -= address;
|
||
|
||
/* We are getting reloc_entry->address 2 byte off from
|
||
the start of instruction. Assuming absolute postion
|
||
of the reloc data. But, following code had been written assuming
|
||
reloc address is starting at begining of instruction.
|
||
To compensate that I have increased the value of
|
||
relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
|
||
|
||
relocation += 2;
|
||
address -= 2;
|
||
|
||
relocation >>= 1;
|
||
|
||
x = bfd_get_16 (input_bfd, contents + address);
|
||
x = (x & 0xff00) | ((relocation >> 16) & 0xff);
|
||
bfd_put_16 (input_bfd, x, contents + address);
|
||
|
||
x = bfd_get_16 (input_bfd, contents + address + 2);
|
||
x = relocation & 0xFFFF;
|
||
bfd_put_16 (input_bfd, x, contents + address + 2);
|
||
r = bfd_reloc_ok;
|
||
}
|
||
else
|
||
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, rel->r_offset,
|
||
relocation, rel->r_addend);
|
||
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
const char * msg = (const char *) NULL;
|
||
|
||
switch (r)
|
||
{
|
||
case bfd_reloc_overflow:
|
||
r = info->callbacks->reloc_overflow
|
||
(info, (h ? &h->root : NULL), name, howto->name,
|
||
(bfd_vma) 0, input_bfd, input_section, rel->r_offset);
|
||
break;
|
||
|
||
case bfd_reloc_undefined:
|
||
r = info->callbacks->undefined_symbol
|
||
(info, name, input_bfd, input_section, rel->r_offset, TRUE);
|
||
break;
|
||
|
||
case bfd_reloc_outofrange:
|
||
msg = _("internal error: out of range error");
|
||
break;
|
||
|
||
case bfd_reloc_notsupported:
|
||
msg = _("internal error: unsupported relocation error");
|
||
break;
|
||
|
||
case bfd_reloc_dangerous:
|
||
msg = _("internal error: dangerous relocation");
|
||
break;
|
||
|
||
default:
|
||
msg = _("internal error: unknown error");
|
||
break;
|
||
}
|
||
|
||
if (msg)
|
||
r = info->callbacks->warning
|
||
(info, msg, name, input_bfd, input_section, rel->r_offset);
|
||
|
||
if (! r)
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
static bfd_boolean
|
||
bfin_relocate_section (bfd * output_bfd,
|
||
struct bfd_link_info *info,
|
||
bfd * input_bfd,
|
||
asection * input_section,
|
||
bfd_byte * contents,
|
||
Elf_Internal_Rela * relocs,
|
||
Elf_Internal_Sym * local_syms,
|
||
asection ** local_sections)
|
||
{
|
||
bfd *dynobj;
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
bfd_vma *local_got_offsets;
|
||
asection *sgot;
|
||
asection *sreloc;
|
||
Elf_Internal_Rela *rel;
|
||
Elf_Internal_Rela *relend;
|
||
int i = 0;
|
||
|
||
if (info->relocatable)
|
||
return TRUE;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (input_bfd);
|
||
local_got_offsets = elf_local_got_offsets (input_bfd);
|
||
|
||
sgot = NULL;
|
||
sreloc = NULL;
|
||
|
||
rel = relocs;
|
||
relend = relocs + input_section->reloc_count;
|
||
for (; rel < relend; rel++, i++)
|
||
{
|
||
int r_type;
|
||
reloc_howto_type *howto;
|
||
unsigned long r_symndx;
|
||
struct elf_link_hash_entry *h;
|
||
Elf_Internal_Sym *sym;
|
||
asection *sec;
|
||
bfd_vma relocation = 0;
|
||
bfd_boolean unresolved_reloc;
|
||
bfd_reloc_status_type r;
|
||
bfd_vma address;
|
||
|
||
r_type = ELF32_R_TYPE (rel->r_info);
|
||
if (r_type < 0 || r_type >= 243)
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
|
||
if (r_type == R_BFIN_GNU_VTENTRY
|
||
|| r_type == R_BFIN_GNU_VTINHERIT)
|
||
continue;
|
||
|
||
howto = bfin_reloc_type_lookup (input_bfd, r_type);
|
||
if (howto == NULL)
|
||
{
|
||
bfd_set_error (bfd_error_bad_value);
|
||
return FALSE;
|
||
}
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
|
||
h = NULL;
|
||
sym = NULL;
|
||
sec = NULL;
|
||
unresolved_reloc = FALSE;
|
||
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
{
|
||
sym = local_syms + r_symndx;
|
||
sec = local_sections[r_symndx];
|
||
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
|
||
}
|
||
else
|
||
{
|
||
bfd_boolean warned;
|
||
h = NULL;
|
||
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
|
||
r_symndx, symtab_hdr, sym_hashes,
|
||
h, sec, relocation,
|
||
unresolved_reloc, warned);
|
||
}
|
||
|
||
address = rel->r_offset;
|
||
|
||
/* Then, process normally. */
|
||
switch (r_type)
|
||
{
|
||
case R_BFIN_GNU_VTINHERIT:
|
||
case R_BFIN_GNU_VTENTRY:
|
||
return bfd_reloc_ok;
|
||
|
||
case R_got:
|
||
/* Relocation is to the address of the entry for this symbol
|
||
in the global offset table. */
|
||
if (h != NULL
|
||
&& strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
|
||
goto do_default;
|
||
/* Fall through. */
|
||
/* Relocation is the offset of the entry for this symbol in
|
||
the global offset table. */
|
||
|
||
{
|
||
bfd_vma off;
|
||
|
||
if (sgot == NULL)
|
||
{
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
BFD_ASSERT (sgot != NULL);
|
||
}
|
||
|
||
if (h != NULL)
|
||
{
|
||
bfd_boolean dyn;
|
||
|
||
off = h->got.offset;
|
||
BFD_ASSERT (off != (bfd_vma) - 1);
|
||
dyn = elf_hash_table (info)->dynamic_sections_created;
|
||
|
||
if (!WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
|
||
|| (info->shared
|
||
&& (info->symbolic
|
||
|| h->dynindx == -1
|
||
|| h->forced_local)
|
||
&& h->def_regular))
|
||
{
|
||
/* This is actually a static link, or it is a
|
||
-Bsymbolic link and the symbol is defined
|
||
locally, or the symbol was forced to be local
|
||
because of a version file.. We must initialize
|
||
this entry in the global offset table. Since
|
||
the offset must always be a multiple of 4, we
|
||
use the least significant bit to record whether
|
||
we have initialized it already.
|
||
|
||
When doing a dynamic link, we create a .rela.got
|
||
relocation entry to initialize the value. This
|
||
is done in the finish_dynamic_symbol routine. */
|
||
if ((off & 1) != 0)
|
||
off &= ~1;
|
||
else
|
||
{
|
||
bfd_put_32 (output_bfd, relocation,
|
||
sgot->contents + off);
|
||
h->got.offset |= 1;
|
||
}
|
||
}
|
||
else
|
||
unresolved_reloc = FALSE;
|
||
}
|
||
else
|
||
{
|
||
BFD_ASSERT (local_got_offsets != NULL);
|
||
off = local_got_offsets[r_symndx];
|
||
BFD_ASSERT (off != (bfd_vma) - 1);
|
||
|
||
/* The offset must always be a multiple of 4. We use
|
||
the least significant bit to record whether we have
|
||
already generated the necessary reloc. */
|
||
if ((off & 1) != 0)
|
||
off &= ~1;
|
||
else
|
||
{
|
||
bfd_put_32 (output_bfd, relocation, sgot->contents + off);
|
||
|
||
if (info->shared)
|
||
{
|
||
asection *s;
|
||
Elf_Internal_Rela outrel;
|
||
bfd_byte *loc;
|
||
|
||
s = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
outrel.r_offset = (sgot->output_section->vma
|
||
+ sgot->output_offset + off);
|
||
outrel.r_info =
|
||
ELF32_R_INFO (0, R_pcrel24);
|
||
outrel.r_addend = relocation;
|
||
loc = s->contents;
|
||
loc +=
|
||
s->reloc_count++ * sizeof (Elf32_External_Rela);
|
||
bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
|
||
}
|
||
|
||
local_got_offsets[r_symndx] |= 1;
|
||
}
|
||
}
|
||
|
||
relocation = sgot->output_offset + off;
|
||
rel->r_addend = 0;
|
||
/* bfin : preg = [preg + 17bitdiv4offset] relocation is div by 4. */
|
||
relocation /= 4;
|
||
}
|
||
goto do_default;
|
||
|
||
case R_pcrel24:
|
||
case R_pcrel24_jump_l:
|
||
{
|
||
bfd_vma x;
|
||
|
||
relocation += rel->r_addend;
|
||
|
||
/* Perform usual pc-relative correction. */
|
||
relocation -= input_section->output_section->vma + input_section->output_offset;
|
||
relocation -= address;
|
||
|
||
/* We are getting reloc_entry->address 2 byte off from
|
||
the start of instruction. Assuming absolute postion
|
||
of the reloc data. But, following code had been written assuming
|
||
reloc address is starting at begining of instruction.
|
||
To compensate that I have increased the value of
|
||
relocation by 1 (effectively 2) and used the addr -2 instead of addr. */
|
||
|
||
relocation += 2;
|
||
address -= 2;
|
||
|
||
relocation >>= 1;
|
||
|
||
x = bfd_get_16 (input_bfd, contents + address);
|
||
x = (x & 0xff00) | ((relocation >> 16) & 0xff);
|
||
bfd_put_16 (input_bfd, x, contents + address);
|
||
|
||
x = bfd_get_16 (input_bfd, contents + address + 2);
|
||
x = relocation & 0xFFFF;
|
||
bfd_put_16 (input_bfd, x, contents + address + 2);
|
||
r = bfd_reloc_ok;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
do_default:
|
||
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, address,
|
||
relocation, rel->r_addend);
|
||
|
||
break;
|
||
}
|
||
|
||
/* Dynamic relocs are not propagated for SEC_DEBUGGING sections
|
||
because such sections are not SEC_ALLOC and thus ld.so will
|
||
not process them. */
|
||
if (unresolved_reloc
|
||
&& !((input_section->flags & SEC_DEBUGGING) != 0 && h->def_dynamic))
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"),
|
||
input_bfd,
|
||
input_section, (long) rel->r_offset, h->root.root.string);
|
||
return FALSE;
|
||
}
|
||
|
||
if (r != bfd_reloc_ok)
|
||
{
|
||
const char *name;
|
||
|
||
if (h != NULL)
|
||
name = h->root.root.string;
|
||
else
|
||
{
|
||
name = bfd_elf_string_from_elf_section (input_bfd,
|
||
symtab_hdr->sh_link,
|
||
sym->st_name);
|
||
if (name == NULL)
|
||
return FALSE;
|
||
if (*name == '\0')
|
||
name = bfd_section_name (input_bfd, sec);
|
||
}
|
||
|
||
if (r == bfd_reloc_overflow)
|
||
{
|
||
if (!(info->callbacks->reloc_overflow
|
||
(info, (h ? &h->root : NULL), name, howto->name,
|
||
(bfd_vma) 0, input_bfd, input_section, rel->r_offset)))
|
||
return FALSE;
|
||
}
|
||
else
|
||
{
|
||
(*_bfd_error_handler)
|
||
(_("%B(%A+0x%lx): reloc against `%s': error %d"),
|
||
input_bfd, input_section,
|
||
(long) rel->r_offset, name, (int) r);
|
||
return FALSE;
|
||
}
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
static asection *
|
||
bfin_gc_mark_hook (asection * sec,
|
||
struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
||
Elf_Internal_Rela * rel,
|
||
struct elf_link_hash_entry *h,
|
||
Elf_Internal_Sym * sym)
|
||
{
|
||
if (h != NULL)
|
||
{
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
|
||
case R_BFIN_GNU_VTINHERIT:
|
||
case R_BFIN_GNU_VTENTRY:
|
||
break;
|
||
|
||
default:
|
||
switch (h->root.type)
|
||
{
|
||
default:
|
||
break;
|
||
|
||
case bfd_link_hash_defined:
|
||
case bfd_link_hash_defweak:
|
||
return h->root.u.def.section;
|
||
|
||
case bfd_link_hash_common:
|
||
return h->root.u.c.p->section;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
|
||
|
||
return NULL;
|
||
}
|
||
|
||
|
||
/* Update the got entry reference counts for the section being removed. */
|
||
|
||
static bfd_boolean
|
||
bfinfdpic_gc_sweep_hook (bfd *abfd ATTRIBUTE_UNUSED,
|
||
struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
||
asection *sec ATTRIBUTE_UNUSED,
|
||
const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED)
|
||
{
|
||
return TRUE;
|
||
}
|
||
|
||
/* Update the got entry reference counts for the section being removed. */
|
||
|
||
static bfd_boolean
|
||
bfin_gc_sweep_hook (bfd * abfd,
|
||
struct bfd_link_info *info,
|
||
asection * sec,
|
||
const Elf_Internal_Rela * relocs)
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes;
|
||
bfd_signed_vma *local_got_refcounts;
|
||
const Elf_Internal_Rela *rel, *relend;
|
||
bfd *dynobj;
|
||
asection *sgot;
|
||
asection *srelgot;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
if (dynobj == NULL)
|
||
return TRUE;
|
||
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (abfd);
|
||
local_got_refcounts = elf_local_got_refcounts (abfd);
|
||
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
|
||
relend = relocs + sec->reloc_count;
|
||
for (rel = relocs; rel < relend; rel++)
|
||
{
|
||
unsigned long r_symndx;
|
||
struct elf_link_hash_entry *h;
|
||
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
case R_got:
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
if (r_symndx >= symtab_hdr->sh_info)
|
||
{
|
||
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
||
if (h->got.refcount > 0)
|
||
{
|
||
--h->got.refcount;
|
||
if (h->got.refcount == 0)
|
||
{
|
||
/* We don't need the .got entry any more. */
|
||
sgot->size -= 4;
|
||
srelgot->size -= sizeof (Elf32_External_Rela);
|
||
}
|
||
}
|
||
}
|
||
else if (local_got_refcounts != NULL)
|
||
{
|
||
if (local_got_refcounts[r_symndx] > 0)
|
||
{
|
||
--local_got_refcounts[r_symndx];
|
||
if (local_got_refcounts[r_symndx] == 0)
|
||
{
|
||
/* We don't need the .got entry any more. */
|
||
sgot->size -= 4;
|
||
if (info->shared)
|
||
srelgot->size -= sizeof (Elf32_External_Rela);
|
||
}
|
||
}
|
||
}
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
return TRUE;
|
||
}
|
||
|
||
/* We need dynamic symbols for every section, since segments can
|
||
relocate independently. */
|
||
static bfd_boolean
|
||
_bfinfdpic_link_omit_section_dynsym (bfd *output_bfd ATTRIBUTE_UNUSED,
|
||
struct bfd_link_info *info
|
||
ATTRIBUTE_UNUSED,
|
||
asection *p ATTRIBUTE_UNUSED)
|
||
{
|
||
switch (elf_section_data (p)->this_hdr.sh_type)
|
||
{
|
||
case SHT_PROGBITS:
|
||
case SHT_NOBITS:
|
||
/* If sh_type is yet undecided, assume it could be
|
||
SHT_PROGBITS/SHT_NOBITS. */
|
||
case SHT_NULL:
|
||
return FALSE;
|
||
|
||
/* There shouldn't be section relative relocations
|
||
against any other section. */
|
||
default:
|
||
return TRUE;
|
||
}
|
||
}
|
||
|
||
/* Create a .got section, as well as its additional info field. This
|
||
is almost entirely copied from
|
||
elflink.c:_bfd_elf_create_got_section(). */
|
||
|
||
static bfd_boolean
|
||
_bfin_create_got_section (bfd *abfd, struct bfd_link_info *info)
|
||
{
|
||
flagword flags, pltflags;
|
||
asection *s;
|
||
struct elf_link_hash_entry *h;
|
||
const struct elf_backend_data *bed = get_elf_backend_data (abfd);
|
||
int ptralign;
|
||
int offset;
|
||
|
||
/* This function may be called more than once. */
|
||
s = bfd_get_section_by_name (abfd, ".got");
|
||
if (s != NULL && (s->flags & SEC_LINKER_CREATED) != 0)
|
||
return TRUE;
|
||
|
||
/* Machine specific: although pointers are 32-bits wide, we want the
|
||
GOT to be aligned to a 64-bit boundary, such that function
|
||
descriptors in it can be accessed with 64-bit loads and
|
||
stores. */
|
||
ptralign = 3;
|
||
|
||
flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
|
||
| SEC_LINKER_CREATED);
|
||
pltflags = flags;
|
||
|
||
s = bfd_make_section_with_flags (abfd, ".got", flags);
|
||
if (s == NULL
|
||
|| !bfd_set_section_alignment (abfd, s, ptralign))
|
||
return FALSE;
|
||
|
||
if (bed->want_got_plt)
|
||
{
|
||
s = bfd_make_section_with_flags (abfd, ".got.plt", flags);
|
||
if (s == NULL
|
||
|| !bfd_set_section_alignment (abfd, s, ptralign))
|
||
return FALSE;
|
||
}
|
||
|
||
if (bed->want_got_sym)
|
||
{
|
||
/* Define the symbol _GLOBAL_OFFSET_TABLE_ at the start of the .got
|
||
(or .got.plt) section. We don't do this in the linker script
|
||
because we don't want to define the symbol if we are not creating
|
||
a global offset table. */
|
||
h = _bfd_elf_define_linkage_sym (abfd, info, s, "_GLOBAL_OFFSET_TABLE_");
|
||
elf_hash_table (info)->hgot = h;
|
||
if (h == NULL)
|
||
return FALSE;
|
||
|
||
/* Machine-specific: we want the symbol for executables as
|
||
well. */
|
||
if (! bfd_elf_link_record_dynamic_symbol (info, h))
|
||
return FALSE;
|
||
}
|
||
|
||
/* The first bit of the global offset table is the header. */
|
||
s->size += bed->got_header_size;
|
||
|
||
/* This is the machine-specific part. Create and initialize section
|
||
data for the got. */
|
||
if (IS_FDPIC (abfd))
|
||
{
|
||
bfinfdpic_got_section (info) = s;
|
||
bfinfdpic_relocs_info (info) = htab_try_create (1,
|
||
bfinfdpic_relocs_info_hash,
|
||
bfinfdpic_relocs_info_eq,
|
||
(htab_del) NULL);
|
||
if (! bfinfdpic_relocs_info (info))
|
||
return FALSE;
|
||
|
||
s = bfd_make_section_with_flags (abfd, ".rel.got",
|
||
(flags | SEC_READONLY));
|
||
if (s == NULL
|
||
|| ! bfd_set_section_alignment (abfd, s, 2))
|
||
return FALSE;
|
||
|
||
bfinfdpic_gotrel_section (info) = s;
|
||
|
||
/* Machine-specific. */
|
||
s = bfd_make_section_with_flags (abfd, ".rofixup",
|
||
(flags | SEC_READONLY));
|
||
if (s == NULL
|
||
|| ! bfd_set_section_alignment (abfd, s, 2))
|
||
return FALSE;
|
||
|
||
bfinfdpic_gotfixup_section (info) = s;
|
||
offset = -2048;
|
||
flags = BSF_GLOBAL;
|
||
}
|
||
else
|
||
{
|
||
offset = 2048;
|
||
flags = BSF_GLOBAL | BSF_WEAK;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Make sure the got and plt sections exist, and that our pointers in
|
||
the link hash table point to them. */
|
||
|
||
static bfd_boolean
|
||
elf32_bfinfdpic_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
|
||
{
|
||
/* This is mostly copied from
|
||
elflink.c:_bfd_elf_create_dynamic_sections(). */
|
||
flagword flags, pltflags;
|
||
asection *s;
|
||
const struct elf_backend_data *bed = get_elf_backend_data (abfd);
|
||
|
||
/* We need to create .plt, .rel[a].plt, .got, .got.plt, .dynbss, and
|
||
.rel[a].bss sections. */
|
||
|
||
flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
|
||
| SEC_LINKER_CREATED);
|
||
|
||
pltflags = flags;
|
||
pltflags |= SEC_CODE;
|
||
if (bed->plt_not_loaded)
|
||
pltflags &= ~ (SEC_CODE | SEC_LOAD | SEC_HAS_CONTENTS);
|
||
if (bed->plt_readonly)
|
||
pltflags |= SEC_READONLY;
|
||
|
||
s = bfd_make_section (abfd, ".plt");
|
||
if (s == NULL
|
||
|| ! bfd_set_section_flags (abfd, s, pltflags)
|
||
|| ! bfd_set_section_alignment (abfd, s, bed->plt_alignment))
|
||
return FALSE;
|
||
/* Blackfin-specific: remember it. */
|
||
bfinfdpic_plt_section (info) = s;
|
||
|
||
if (bed->want_plt_sym)
|
||
{
|
||
/* Define the symbol _PROCEDURE_LINKAGE_TABLE_ at the start of the
|
||
.plt section. */
|
||
struct elf_link_hash_entry *h;
|
||
struct bfd_link_hash_entry *bh = NULL;
|
||
|
||
if (! (_bfd_generic_link_add_one_symbol
|
||
(info, abfd, "_PROCEDURE_LINKAGE_TABLE_", BSF_GLOBAL, s, 0, NULL,
|
||
FALSE, get_elf_backend_data (abfd)->collect, &bh)))
|
||
return FALSE;
|
||
h = (struct elf_link_hash_entry *) bh;
|
||
h->def_regular = 1;
|
||
h->type = STT_OBJECT;
|
||
|
||
if (! info->executable
|
||
&& ! bfd_elf_link_record_dynamic_symbol (info, h))
|
||
return FALSE;
|
||
}
|
||
|
||
/* Blackfin-specific: we want rel relocations for the plt. */
|
||
s = bfd_make_section (abfd, ".rel.plt");
|
||
if (s == NULL
|
||
|| ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
|
||
|| ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
|
||
return FALSE;
|
||
/* Blackfin-specific: remember it. */
|
||
bfinfdpic_pltrel_section (info) = s;
|
||
|
||
/* Blackfin-specific: we want to create the GOT in the Blackfin way. */
|
||
if (! _bfin_create_got_section (abfd, info))
|
||
return FALSE;
|
||
|
||
/* Blackfin-specific: make sure we created everything we wanted. */
|
||
BFD_ASSERT (bfinfdpic_got_section (info) && bfinfdpic_gotrel_section (info)
|
||
/* && bfinfdpic_gotfixup_section (info) */
|
||
&& bfinfdpic_plt_section (info)
|
||
&& bfinfdpic_pltrel_section (info));
|
||
|
||
if (bed->want_dynbss)
|
||
{
|
||
/* The .dynbss section is a place to put symbols which are defined
|
||
by dynamic objects, are referenced by regular objects, and are
|
||
not functions. We must allocate space for them in the process
|
||
image and use a R_*_COPY reloc to tell the dynamic linker to
|
||
initialize them at run time. The linker script puts the .dynbss
|
||
section into the .bss section of the final image. */
|
||
s = bfd_make_section (abfd, ".dynbss");
|
||
if (s == NULL
|
||
|| ! bfd_set_section_flags (abfd, s, SEC_ALLOC | SEC_LINKER_CREATED))
|
||
return FALSE;
|
||
|
||
/* The .rel[a].bss section holds copy relocs. This section is not
|
||
normally needed. We need to create it here, though, so that the
|
||
linker will map it to an output section. We can't just create it
|
||
only if we need it, because we will not know whether we need it
|
||
until we have seen all the input files, and the first time the
|
||
main linker code calls BFD after examining all the input files
|
||
(size_dynamic_sections) the input sections have already been
|
||
mapped to the output sections. If the section turns out not to
|
||
be needed, we can discard it later. We will never need this
|
||
section when generating a shared object, since they do not use
|
||
copy relocs. */
|
||
if (! info->shared)
|
||
{
|
||
s = bfd_make_section (abfd,
|
||
(bed->default_use_rela_p
|
||
? ".rela.bss" : ".rel.bss"));
|
||
if (s == NULL
|
||
|| ! bfd_set_section_flags (abfd, s, flags | SEC_READONLY)
|
||
|| ! bfd_set_section_alignment (abfd, s, bed->s->log_file_align))
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* The name of the dynamic interpreter. This is put in the .interp
|
||
section. */
|
||
|
||
#define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
|
||
|
||
#define DEFAULT_STACK_SIZE 0x20000
|
||
|
||
/* This structure is used to collect the number of entries present in
|
||
each addressable range of the got. */
|
||
struct _bfinfdpic_dynamic_got_info
|
||
{
|
||
/* Several bits of information about the current link. */
|
||
struct bfd_link_info *info;
|
||
/* Total size needed for GOT entries within the 18- or 32-bit
|
||
ranges. */
|
||
bfd_vma got17m4, gothilo;
|
||
/* Total size needed for function descriptor entries within the 18-
|
||
or 32-bit ranges. */
|
||
bfd_vma fd17m4, fdhilo;
|
||
/* Total size needed function descriptor entries referenced in PLT
|
||
entries, that would be profitable to place in offsets close to
|
||
the PIC register. */
|
||
bfd_vma fdplt;
|
||
/* Total size needed by lazy PLT entries. */
|
||
bfd_vma lzplt;
|
||
/* Number of relocations carried over from input object files. */
|
||
unsigned long relocs;
|
||
/* Number of fixups introduced by relocations in input object files. */
|
||
unsigned long fixups;
|
||
};
|
||
|
||
/* Compute the total GOT size required by each symbol in each range.
|
||
Symbols may require up to 4 words in the GOT: an entry pointing to
|
||
the symbol, an entry pointing to its function descriptor, and a
|
||
private function descriptors taking two words. */
|
||
|
||
static int
|
||
_bfinfdpic_count_got_plt_entries (void **entryp, void *dinfo_)
|
||
{
|
||
struct bfinfdpic_relocs_info *entry = *entryp;
|
||
struct _bfinfdpic_dynamic_got_info *dinfo = dinfo_;
|
||
unsigned relocs = 0, fixups = 0;
|
||
|
||
/* Allocate space for a GOT entry pointing to the symbol. */
|
||
if (entry->got17m4)
|
||
dinfo->got17m4 += 4;
|
||
else if (entry->gothilo)
|
||
dinfo->gothilo += 4;
|
||
else
|
||
entry->relocs32--;
|
||
entry->relocs32++;
|
||
|
||
/* Allocate space for a GOT entry pointing to the function
|
||
descriptor. */
|
||
if (entry->fdgot17m4)
|
||
dinfo->got17m4 += 4;
|
||
else if (entry->fdgothilo)
|
||
dinfo->gothilo += 4;
|
||
else
|
||
entry->relocsfd--;
|
||
entry->relocsfd++;
|
||
|
||
/* Decide whether we need a PLT entry, a function descriptor in the
|
||
GOT, and a lazy PLT entry for this symbol. */
|
||
entry->plt = entry->call
|
||
&& entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
|
||
&& elf_hash_table (dinfo->info)->dynamic_sections_created;
|
||
entry->privfd = entry->plt
|
||
|| entry->fdgoff17m4 || entry->fdgoffhilo
|
||
|| ((entry->fd || entry->fdgot17m4 || entry->fdgothilo)
|
||
&& (entry->symndx != -1
|
||
|| BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h)));
|
||
entry->lazyplt = entry->privfd
|
||
&& entry->symndx == -1 && ! BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h)
|
||
&& ! (dinfo->info->flags & DF_BIND_NOW)
|
||
&& elf_hash_table (dinfo->info)->dynamic_sections_created;
|
||
|
||
/* Allocate space for a function descriptor. */
|
||
if (entry->fdgoff17m4)
|
||
dinfo->fd17m4 += 8;
|
||
else if (entry->privfd && entry->plt)
|
||
dinfo->fdplt += 8;
|
||
else if (entry->privfd)
|
||
dinfo->fdhilo += 8;
|
||
else
|
||
entry->relocsfdv--;
|
||
entry->relocsfdv++;
|
||
|
||
if (entry->lazyplt)
|
||
dinfo->lzplt += LZPLT_NORMAL_SIZE;
|
||
|
||
if (!dinfo->info->executable || dinfo->info->pie)
|
||
relocs = entry->relocs32 + entry->relocsfd + entry->relocsfdv;
|
||
else
|
||
{
|
||
if (entry->symndx != -1 || BFINFDPIC_SYM_LOCAL (dinfo->info, entry->d.h))
|
||
{
|
||
if (entry->symndx != -1
|
||
|| entry->d.h->root.type != bfd_link_hash_undefweak)
|
||
fixups += entry->relocs32 + 2 * entry->relocsfdv;
|
||
}
|
||
else
|
||
relocs += entry->relocs32 + entry->relocsfdv;
|
||
|
||
if (entry->symndx != -1
|
||
|| BFINFDPIC_FUNCDESC_LOCAL (dinfo->info, entry->d.h))
|
||
{
|
||
if (entry->symndx != -1
|
||
|| entry->d.h->root.type != bfd_link_hash_undefweak)
|
||
fixups += entry->relocsfd;
|
||
}
|
||
else
|
||
relocs += entry->relocsfd;
|
||
}
|
||
|
||
entry->dynrelocs += relocs;
|
||
entry->fixups += fixups;
|
||
dinfo->relocs += relocs;
|
||
dinfo->fixups += fixups;
|
||
|
||
return 1;
|
||
}
|
||
|
||
/* This structure is used to assign offsets to got entries, function
|
||
descriptors, plt entries and lazy plt entries. */
|
||
|
||
struct _bfinfdpic_dynamic_got_plt_info
|
||
{
|
||
/* Summary information collected with _bfinfdpic_count_got_plt_entries. */
|
||
struct _bfinfdpic_dynamic_got_info g;
|
||
|
||
/* For each addressable range, we record a MAX (positive) and MIN
|
||
(negative) value. CUR is used to assign got entries, and it's
|
||
incremented from an initial positive value to MAX, then from MIN
|
||
to FDCUR (unless FDCUR wraps around first). FDCUR is used to
|
||
assign function descriptors, and it's decreased from an initial
|
||
non-positive value to MIN, then from MAX down to CUR (unless CUR
|
||
wraps around first). All of MIN, MAX, CUR and FDCUR always point
|
||
to even words. ODD, if non-zero, indicates an odd word to be
|
||
used for the next got entry, otherwise CUR is used and
|
||
incremented by a pair of words, wrapping around when it reaches
|
||
MAX. FDCUR is decremented (and wrapped) before the next function
|
||
descriptor is chosen. FDPLT indicates the number of remaining
|
||
slots that can be used for function descriptors used only by PLT
|
||
entries. */
|
||
struct _bfinfdpic_dynamic_got_alloc_data
|
||
{
|
||
bfd_signed_vma max, cur, odd, fdcur, min;
|
||
bfd_vma fdplt;
|
||
} got17m4, gothilo;
|
||
};
|
||
|
||
/* Determine the positive and negative ranges to be used by each
|
||
offset range in the GOT. FDCUR and CUR, that must be aligned to a
|
||
double-word boundary, are the minimum (negative) and maximum
|
||
(positive) GOT offsets already used by previous ranges, except for
|
||
an ODD entry that may have been left behind. GOT and FD indicate
|
||
the size of GOT entries and function descriptors that must be
|
||
placed within the range from -WRAP to WRAP. If there's room left,
|
||
up to FDPLT bytes should be reserved for additional function
|
||
descriptors. */
|
||
|
||
inline static bfd_signed_vma
|
||
_bfinfdpic_compute_got_alloc_data (struct _bfinfdpic_dynamic_got_alloc_data *gad,
|
||
bfd_signed_vma fdcur,
|
||
bfd_signed_vma odd,
|
||
bfd_signed_vma cur,
|
||
bfd_vma got,
|
||
bfd_vma fd,
|
||
bfd_vma fdplt,
|
||
bfd_vma wrap)
|
||
{
|
||
bfd_signed_vma wrapmin = -wrap;
|
||
|
||
/* Start at the given initial points. */
|
||
gad->fdcur = fdcur;
|
||
gad->cur = cur;
|
||
|
||
/* If we had an incoming odd word and we have any got entries that
|
||
are going to use it, consume it, otherwise leave gad->odd at
|
||
zero. We might force gad->odd to zero and return the incoming
|
||
odd such that it is used by the next range, but then GOT entries
|
||
might appear to be out of order and we wouldn't be able to
|
||
shorten the GOT by one word if it turns out to end with an
|
||
unpaired GOT entry. */
|
||
if (odd && got)
|
||
{
|
||
gad->odd = odd;
|
||
got -= 4;
|
||
odd = 0;
|
||
}
|
||
else
|
||
gad->odd = 0;
|
||
|
||
/* If we're left with an unpaired GOT entry, compute its location
|
||
such that we can return it. Otherwise, if got doesn't require an
|
||
odd number of words here, either odd was already zero in the
|
||
block above, or it was set to zero because got was non-zero, or
|
||
got was already zero. In the latter case, we want the value of
|
||
odd to carry over to the return statement, so we don't want to
|
||
reset odd unless the condition below is true. */
|
||
if (got & 4)
|
||
{
|
||
odd = cur + got;
|
||
got += 4;
|
||
}
|
||
|
||
/* Compute the tentative boundaries of this range. */
|
||
gad->max = cur + got;
|
||
gad->min = fdcur - fd;
|
||
gad->fdplt = 0;
|
||
|
||
/* If function descriptors took too much space, wrap some of them
|
||
around. */
|
||
if (gad->min < wrapmin)
|
||
{
|
||
gad->max += wrapmin - gad->min;
|
||
gad->min = wrapmin;
|
||
}
|
||
/* If there is space left and we have function descriptors
|
||
referenced in PLT entries that could take advantage of shorter
|
||
offsets, place them here. */
|
||
else if (fdplt && gad->min > wrapmin)
|
||
{
|
||
bfd_vma fds;
|
||
if ((bfd_vma) (gad->min - wrapmin) < fdplt)
|
||
fds = gad->min - wrapmin;
|
||
else
|
||
fds = fdplt;
|
||
|
||
fdplt -= fds;
|
||
gad->min -= fds;
|
||
gad->fdplt += fds;
|
||
}
|
||
|
||
/* If GOT entries took too much space, wrap some of them around.
|
||
This may well cause gad->min to become lower than wrapmin. This
|
||
will cause a relocation overflow later on, so we don't have to
|
||
report it here . */
|
||
if ((bfd_vma) gad->max > wrap)
|
||
{
|
||
gad->min -= gad->max - wrap;
|
||
gad->max = wrap;
|
||
}
|
||
/* If there is more space left, try to place some more function
|
||
descriptors for PLT entries. */
|
||
else if (fdplt && (bfd_vma) gad->max < wrap)
|
||
{
|
||
bfd_vma fds;
|
||
if ((bfd_vma) (wrap - gad->max) < fdplt)
|
||
fds = wrap - gad->max;
|
||
else
|
||
fds = fdplt;
|
||
|
||
fdplt -= fds;
|
||
gad->max += fds;
|
||
gad->fdplt += fds;
|
||
}
|
||
|
||
/* If odd was initially computed as an offset past the wrap point,
|
||
wrap it around. */
|
||
if (odd > gad->max)
|
||
odd = gad->min + odd - gad->max;
|
||
|
||
/* _bfinfdpic_get_got_entry() below will always wrap gad->cur if needed
|
||
before returning, so do it here too. This guarantees that,
|
||
should cur and fdcur meet at the wrap point, they'll both be
|
||
equal to min. */
|
||
if (gad->cur == gad->max)
|
||
gad->cur = gad->min;
|
||
|
||
return odd;
|
||
}
|
||
|
||
/* Compute the location of the next GOT entry, given the allocation
|
||
data for a range. */
|
||
|
||
inline static bfd_signed_vma
|
||
_bfinfdpic_get_got_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
|
||
{
|
||
bfd_signed_vma ret;
|
||
|
||
if (gad->odd)
|
||
{
|
||
/* If there was an odd word left behind, use it. */
|
||
ret = gad->odd;
|
||
gad->odd = 0;
|
||
}
|
||
else
|
||
{
|
||
/* Otherwise, use the word pointed to by cur, reserve the next
|
||
as an odd word, and skip to the next pair of words, possibly
|
||
wrapping around. */
|
||
ret = gad->cur;
|
||
gad->odd = gad->cur + 4;
|
||
gad->cur += 8;
|
||
if (gad->cur == gad->max)
|
||
gad->cur = gad->min;
|
||
}
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* Compute the location of the next function descriptor entry in the
|
||
GOT, given the allocation data for a range. */
|
||
|
||
inline static bfd_signed_vma
|
||
_bfinfdpic_get_fd_entry (struct _bfinfdpic_dynamic_got_alloc_data *gad)
|
||
{
|
||
/* If we're at the bottom, wrap around, and only then allocate the
|
||
next pair of words. */
|
||
if (gad->fdcur == gad->min)
|
||
gad->fdcur = gad->max;
|
||
return gad->fdcur -= 8;
|
||
}
|
||
|
||
/* Assign GOT offsets for every GOT entry and function descriptor.
|
||
Doing everything in a single pass is tricky. */
|
||
|
||
static int
|
||
_bfinfdpic_assign_got_entries (void **entryp, void *info_)
|
||
{
|
||
struct bfinfdpic_relocs_info *entry = *entryp;
|
||
struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
|
||
|
||
if (entry->got17m4)
|
||
entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
|
||
else if (entry->gothilo)
|
||
entry->got_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
|
||
|
||
if (entry->fdgot17m4)
|
||
entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->got17m4);
|
||
else if (entry->fdgothilo)
|
||
entry->fdgot_entry = _bfinfdpic_get_got_entry (&dinfo->gothilo);
|
||
|
||
if (entry->fdgoff17m4)
|
||
entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
|
||
else if (entry->plt && dinfo->got17m4.fdplt)
|
||
{
|
||
dinfo->got17m4.fdplt -= 8;
|
||
entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
|
||
}
|
||
else if (entry->plt)
|
||
{
|
||
dinfo->gothilo.fdplt -= 8;
|
||
entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
|
||
}
|
||
else if (entry->privfd)
|
||
entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
|
||
|
||
return 1;
|
||
}
|
||
|
||
/* Assign GOT offsets to private function descriptors used by PLT
|
||
entries (or referenced by 32-bit offsets), as well as PLT entries
|
||
and lazy PLT entries. */
|
||
|
||
static int
|
||
_bfinfdpic_assign_plt_entries (void **entryp, void *info_)
|
||
{
|
||
struct bfinfdpic_relocs_info *entry = *entryp;
|
||
struct _bfinfdpic_dynamic_got_plt_info *dinfo = info_;
|
||
|
||
/* If this symbol requires a local function descriptor, allocate
|
||
one. */
|
||
if (entry->privfd && entry->fd_entry == 0)
|
||
{
|
||
if (dinfo->got17m4.fdplt)
|
||
{
|
||
entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->got17m4);
|
||
dinfo->got17m4.fdplt -= 8;
|
||
}
|
||
else
|
||
{
|
||
BFD_ASSERT (dinfo->gothilo.fdplt);
|
||
entry->fd_entry = _bfinfdpic_get_fd_entry (&dinfo->gothilo);
|
||
dinfo->gothilo.fdplt -= 8;
|
||
}
|
||
}
|
||
|
||
if (entry->plt)
|
||
{
|
||
int size;
|
||
|
||
/* We use the section's raw size to mark the location of the
|
||
next PLT entry. */
|
||
entry->plt_entry = bfinfdpic_plt_section (dinfo->g.info)->size;
|
||
|
||
/* Figure out the length of this PLT entry based on the
|
||
addressing mode we need to reach the function descriptor. */
|
||
BFD_ASSERT (entry->fd_entry);
|
||
if (entry->fd_entry >= -(1 << (18 - 1))
|
||
&& entry->fd_entry + 4 < (1 << (18 - 1)))
|
||
size = 10;
|
||
else
|
||
size = 16;
|
||
|
||
bfinfdpic_plt_section (dinfo->g.info)->size += size;
|
||
}
|
||
|
||
if (entry->lazyplt)
|
||
{
|
||
entry->lzplt_entry = dinfo->g.lzplt;
|
||
dinfo->g.lzplt += LZPLT_NORMAL_SIZE;
|
||
/* If this entry is the one that gets the resolver stub, account
|
||
for the additional instruction. */
|
||
if (entry->lzplt_entry % BFINFDPIC_LZPLT_BLOCK_SIZE
|
||
== BFINFDPIC_LZPLT_RESOLV_LOC)
|
||
dinfo->g.lzplt += LZPLT_RESOLVER_EXTRA;
|
||
}
|
||
|
||
return 1;
|
||
}
|
||
|
||
/* Follow indirect and warning hash entries so that each got entry
|
||
points to the final symbol definition. P must point to a pointer
|
||
to the hash table we're traversing. Since this traversal may
|
||
modify the hash table, we set this pointer to NULL to indicate
|
||
we've made a potentially-destructive change to the hash table, so
|
||
the traversal must be restarted. */
|
||
static int
|
||
_bfinfdpic_resolve_final_relocs_info (void **entryp, void *p)
|
||
{
|
||
struct bfinfdpic_relocs_info *entry = *entryp;
|
||
htab_t *htab = p;
|
||
|
||
if (entry->symndx == -1)
|
||
{
|
||
struct elf_link_hash_entry *h = entry->d.h;
|
||
struct bfinfdpic_relocs_info *oentry;
|
||
|
||
while (h->root.type == bfd_link_hash_indirect
|
||
|| h->root.type == bfd_link_hash_warning)
|
||
h = (struct elf_link_hash_entry *)h->root.u.i.link;
|
||
|
||
if (entry->d.h == h)
|
||
return 1;
|
||
|
||
oentry = bfinfdpic_relocs_info_for_global (*htab, 0, h, entry->addend,
|
||
NO_INSERT);
|
||
|
||
if (oentry)
|
||
{
|
||
/* Merge the two entries. */
|
||
bfinfdpic_pic_merge_early_relocs_info (oentry, entry);
|
||
htab_clear_slot (*htab, entryp);
|
||
return 1;
|
||
}
|
||
|
||
entry->d.h = h;
|
||
|
||
/* If we can't find this entry with the new bfd hash, re-insert
|
||
it, and get the traversal restarted. */
|
||
if (! htab_find (*htab, entry))
|
||
{
|
||
htab_clear_slot (*htab, entryp);
|
||
entryp = htab_find_slot (*htab, entry, INSERT);
|
||
if (! *entryp)
|
||
*entryp = entry;
|
||
/* Abort the traversal, since the whole table may have
|
||
moved, and leave it up to the parent to restart the
|
||
process. */
|
||
*(htab_t *)p = NULL;
|
||
return 0;
|
||
}
|
||
}
|
||
|
||
return 1;
|
||
}
|
||
|
||
/* Set the sizes of the dynamic sections. */
|
||
|
||
static bfd_boolean
|
||
elf32_bfinfdpic_size_dynamic_sections (bfd *output_bfd,
|
||
struct bfd_link_info *info)
|
||
{
|
||
bfd *dynobj;
|
||
asection *s;
|
||
struct _bfinfdpic_dynamic_got_plt_info gpinfo;
|
||
bfd_signed_vma odd;
|
||
bfd_vma limit;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
BFD_ASSERT (dynobj != NULL);
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
/* Set the contents of the .interp section to the interpreter. */
|
||
if (info->executable)
|
||
{
|
||
s = bfd_get_section_by_name (dynobj, ".interp");
|
||
BFD_ASSERT (s != NULL);
|
||
s->size = sizeof ELF_DYNAMIC_INTERPRETER;
|
||
s->contents = (bfd_byte *) ELF_DYNAMIC_INTERPRETER;
|
||
}
|
||
}
|
||
|
||
memset (&gpinfo, 0, sizeof (gpinfo));
|
||
gpinfo.g.info = info;
|
||
|
||
for (;;)
|
||
{
|
||
htab_t relocs = bfinfdpic_relocs_info (info);
|
||
|
||
htab_traverse (relocs, _bfinfdpic_resolve_final_relocs_info, &relocs);
|
||
|
||
if (relocs == bfinfdpic_relocs_info (info))
|
||
break;
|
||
}
|
||
|
||
htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_count_got_plt_entries,
|
||
&gpinfo.g);
|
||
|
||
odd = 12;
|
||
/* Compute the total size taken by entries in the 18-bit range,
|
||
to tell how many PLT function descriptors we can bring into it
|
||
without causing it to overflow. */
|
||
limit = odd + gpinfo.g.got17m4 + gpinfo.g.fd17m4;
|
||
if (limit < (bfd_vma)1 << 18)
|
||
limit = ((bfd_vma)1 << 18) - limit;
|
||
else
|
||
limit = 0;
|
||
if (gpinfo.g.fdplt < limit)
|
||
limit = gpinfo.g.fdplt;
|
||
|
||
/* Determine the ranges of GOT offsets that we can use for each
|
||
range of addressing modes. */
|
||
odd = _bfinfdpic_compute_got_alloc_data (&gpinfo.got17m4,
|
||
0,
|
||
odd,
|
||
16,
|
||
gpinfo.g.got17m4,
|
||
gpinfo.g.fd17m4,
|
||
limit,
|
||
(bfd_vma)1 << (18-1));
|
||
odd = _bfinfdpic_compute_got_alloc_data (&gpinfo.gothilo,
|
||
gpinfo.got17m4.min,
|
||
odd,
|
||
gpinfo.got17m4.max,
|
||
gpinfo.g.gothilo,
|
||
gpinfo.g.fdhilo,
|
||
gpinfo.g.fdplt - gpinfo.got17m4.fdplt,
|
||
(bfd_vma)1 << (32-1));
|
||
|
||
/* Now assign (most) GOT offsets. */
|
||
htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_got_entries,
|
||
&gpinfo);
|
||
|
||
bfinfdpic_got_section (info)->size = gpinfo.gothilo.max
|
||
- gpinfo.gothilo.min
|
||
/* If an odd word is the last word of the GOT, we don't need this
|
||
word to be part of the GOT. */
|
||
- (odd + 4 == gpinfo.gothilo.max ? 4 : 0);
|
||
if (bfinfdpic_got_section (info)->size == 0)
|
||
bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
|
||
else if (bfinfdpic_got_section (info)->size == 12
|
||
&& ! elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
bfinfdpic_got_section (info)->flags |= SEC_EXCLUDE;
|
||
bfinfdpic_got_section (info)->size = 0;
|
||
}
|
||
else
|
||
{
|
||
bfinfdpic_got_section (info)->contents =
|
||
(bfd_byte *) bfd_zalloc (dynobj,
|
||
bfinfdpic_got_section (info)->size);
|
||
if (bfinfdpic_got_section (info)->contents == NULL)
|
||
return FALSE;
|
||
}
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
/* Subtract the number of lzplt entries, since those will generate
|
||
relocations in the pltrel section. */
|
||
bfinfdpic_gotrel_section (info)->size =
|
||
(gpinfo.g.relocs - gpinfo.g.lzplt / LZPLT_NORMAL_SIZE)
|
||
* get_elf_backend_data (output_bfd)->s->sizeof_rel;
|
||
else
|
||
BFD_ASSERT (gpinfo.g.relocs == 0);
|
||
if (bfinfdpic_gotrel_section (info)->size == 0)
|
||
bfinfdpic_gotrel_section (info)->flags |= SEC_EXCLUDE;
|
||
else
|
||
{
|
||
bfinfdpic_gotrel_section (info)->contents =
|
||
(bfd_byte *) bfd_zalloc (dynobj,
|
||
bfinfdpic_gotrel_section (info)->size);
|
||
if (bfinfdpic_gotrel_section (info)->contents == NULL)
|
||
return FALSE;
|
||
}
|
||
|
||
bfinfdpic_gotfixup_section (info)->size = (gpinfo.g.fixups + 1) * 4;
|
||
if (bfinfdpic_gotfixup_section (info)->size == 0)
|
||
bfinfdpic_gotfixup_section (info)->flags |= SEC_EXCLUDE;
|
||
else
|
||
{
|
||
bfinfdpic_gotfixup_section (info)->contents =
|
||
(bfd_byte *) bfd_zalloc (dynobj,
|
||
bfinfdpic_gotfixup_section (info)->size);
|
||
if (bfinfdpic_gotfixup_section (info)->contents == NULL)
|
||
return FALSE;
|
||
}
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
bfinfdpic_pltrel_section (info)->size =
|
||
gpinfo.g.lzplt / LZPLT_NORMAL_SIZE * get_elf_backend_data (output_bfd)->s->sizeof_rel;
|
||
if (bfinfdpic_pltrel_section (info)->size == 0)
|
||
bfinfdpic_pltrel_section (info)->flags |= SEC_EXCLUDE;
|
||
else
|
||
{
|
||
bfinfdpic_pltrel_section (info)->contents =
|
||
(bfd_byte *) bfd_zalloc (dynobj,
|
||
bfinfdpic_pltrel_section (info)->size);
|
||
if (bfinfdpic_pltrel_section (info)->contents == NULL)
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
/* Add 4 bytes for every block of at most 65535 lazy PLT entries,
|
||
such that there's room for the additional instruction needed to
|
||
call the resolver. Since _bfinfdpic_assign_got_entries didn't
|
||
account for them, our block size is 4 bytes smaller than the real
|
||
block size. */
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
bfinfdpic_plt_section (info)->size = gpinfo.g.lzplt
|
||
+ ((gpinfo.g.lzplt + (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) - LZPLT_NORMAL_SIZE)
|
||
/ (BFINFDPIC_LZPLT_BLOCK_SIZE - 4) * LZPLT_RESOLVER_EXTRA);
|
||
}
|
||
|
||
/* Reset it, such that _bfinfdpic_assign_plt_entries() can use it to
|
||
actually assign lazy PLT entries addresses. */
|
||
gpinfo.g.lzplt = 0;
|
||
|
||
/* Save information that we're going to need to generate GOT and PLT
|
||
entries. */
|
||
bfinfdpic_got_initial_offset (info) = -gpinfo.gothilo.min;
|
||
|
||
if (get_elf_backend_data (output_bfd)->want_got_sym)
|
||
elf_hash_table (info)->hgot->root.u.def.value
|
||
+= bfinfdpic_got_initial_offset (info);
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
bfinfdpic_plt_initial_offset (info) =
|
||
bfinfdpic_plt_section (info)->size;
|
||
|
||
htab_traverse (bfinfdpic_relocs_info (info), _bfinfdpic_assign_plt_entries,
|
||
&gpinfo);
|
||
|
||
/* Allocate the PLT section contents only after
|
||
_bfinfdpic_assign_plt_entries has a chance to add the size of the
|
||
non-lazy PLT entries. */
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
if (bfinfdpic_plt_section (info)->size == 0)
|
||
bfinfdpic_plt_section (info)->flags |= SEC_EXCLUDE;
|
||
else
|
||
{
|
||
bfinfdpic_plt_section (info)->contents =
|
||
(bfd_byte *) bfd_zalloc (dynobj,
|
||
bfinfdpic_plt_section (info)->size);
|
||
if (bfinfdpic_plt_section (info)->contents == NULL)
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
if (bfinfdpic_got_section (info)->size)
|
||
if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0))
|
||
return FALSE;
|
||
|
||
if (bfinfdpic_pltrel_section (info)->size)
|
||
if (!_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0)
|
||
|| !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_REL)
|
||
|| !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0))
|
||
return FALSE;
|
||
|
||
if (bfinfdpic_gotrel_section (info)->size)
|
||
if (!_bfd_elf_add_dynamic_entry (info, DT_REL, 0)
|
||
|| !_bfd_elf_add_dynamic_entry (info, DT_RELSZ, 0)
|
||
|| !_bfd_elf_add_dynamic_entry (info, DT_RELENT,
|
||
sizeof (Elf32_External_Rel)))
|
||
return FALSE;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
static bfd_boolean
|
||
elf32_bfinfdpic_always_size_sections (bfd *output_bfd,
|
||
struct bfd_link_info *info)
|
||
{
|
||
if (!info->relocatable)
|
||
{
|
||
struct elf_link_hash_entry *h;
|
||
asection *sec;
|
||
|
||
/* Force a PT_GNU_STACK segment to be created. */
|
||
if (! elf_tdata (output_bfd)->stack_flags)
|
||
elf_tdata (output_bfd)->stack_flags = PF_R | PF_W | PF_X;
|
||
|
||
/* Define __stacksize if it's not defined yet. */
|
||
h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
|
||
FALSE, FALSE, FALSE);
|
||
if (! h || h->root.type != bfd_link_hash_defined
|
||
|| h->type != STT_OBJECT
|
||
|| !h->def_regular)
|
||
{
|
||
struct bfd_link_hash_entry *bh = NULL;
|
||
|
||
if (!(_bfd_generic_link_add_one_symbol
|
||
(info, output_bfd, "__stacksize",
|
||
BSF_GLOBAL, bfd_abs_section_ptr, DEFAULT_STACK_SIZE,
|
||
(const char *) NULL, FALSE,
|
||
get_elf_backend_data (output_bfd)->collect, &bh)))
|
||
return FALSE;
|
||
|
||
h = (struct elf_link_hash_entry *) bh;
|
||
h->def_regular = 1;
|
||
h->type = STT_OBJECT;
|
||
}
|
||
|
||
/* Create a stack section, and set its alignment. */
|
||
sec = bfd_make_section (output_bfd, ".stack");
|
||
|
||
if (sec == NULL
|
||
|| ! bfd_set_section_alignment (output_bfd, sec, 3))
|
||
return FALSE;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
static bfd_boolean
|
||
elf32_bfinfdpic_modify_segment_map (bfd *output_bfd,
|
||
struct bfd_link_info *info)
|
||
{
|
||
struct elf_segment_map *m;
|
||
|
||
/* objcopy and strip preserve what's already there using
|
||
elf32_bfinfdpic_copy_private_bfd_data (). */
|
||
if (! info)
|
||
return TRUE;
|
||
|
||
for (m = elf_tdata (output_bfd)->segment_map; m != NULL; m = m->next)
|
||
if (m->p_type == PT_GNU_STACK)
|
||
break;
|
||
|
||
if (m)
|
||
{
|
||
asection *sec = bfd_get_section_by_name (output_bfd, ".stack");
|
||
struct elf_link_hash_entry *h;
|
||
|
||
if (sec)
|
||
{
|
||
/* Obtain the pointer to the __stacksize symbol. */
|
||
h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
|
||
FALSE, FALSE, FALSE);
|
||
while (h->root.type == bfd_link_hash_indirect
|
||
|| h->root.type == bfd_link_hash_warning)
|
||
h = (struct elf_link_hash_entry *)h->root.u.i.link;
|
||
BFD_ASSERT (h->root.type == bfd_link_hash_defined);
|
||
|
||
/* Set the section size from the symbol value. We
|
||
intentionally ignore the symbol section. */
|
||
if (h->root.type == bfd_link_hash_defined)
|
||
sec->size = h->root.u.def.value;
|
||
else
|
||
sec->size = DEFAULT_STACK_SIZE;
|
||
|
||
/* Add the stack section to the PT_GNU_STACK segment,
|
||
such that its size and alignment requirements make it
|
||
to the segment. */
|
||
m->sections[m->count] = sec;
|
||
m->count++;
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
static bfd_boolean
|
||
elf32_bfinfdpic_finish_dynamic_sections (bfd *output_bfd,
|
||
struct bfd_link_info *info)
|
||
{
|
||
bfd *dynobj;
|
||
asection *sdyn;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
|
||
if (bfinfdpic_got_section (info))
|
||
{
|
||
BFD_ASSERT (bfinfdpic_gotrel_section (info)->size
|
||
== (bfinfdpic_gotrel_section (info)->reloc_count
|
||
* sizeof (Elf32_External_Rel)));
|
||
|
||
if (bfinfdpic_gotfixup_section (info))
|
||
{
|
||
struct elf_link_hash_entry *hgot = elf_hash_table (info)->hgot;
|
||
bfd_vma got_value = hgot->root.u.def.value
|
||
+ hgot->root.u.def.section->output_section->vma
|
||
+ hgot->root.u.def.section->output_offset;
|
||
|
||
_bfinfdpic_add_rofixup (output_bfd, bfinfdpic_gotfixup_section (info),
|
||
got_value, 0);
|
||
|
||
if (bfinfdpic_gotfixup_section (info)->size
|
||
!= (bfinfdpic_gotfixup_section (info)->reloc_count * 4))
|
||
{
|
||
(*_bfd_error_handler)
|
||
("LINKER BUG: .rofixup section size mismatch");
|
||
return FALSE;
|
||
}
|
||
}
|
||
}
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
BFD_ASSERT (bfinfdpic_pltrel_section (info)->size
|
||
== (bfinfdpic_pltrel_section (info)->reloc_count
|
||
* sizeof (Elf32_External_Rel)));
|
||
}
|
||
|
||
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
Elf32_External_Dyn * dyncon;
|
||
Elf32_External_Dyn * dynconend;
|
||
|
||
BFD_ASSERT (sdyn != NULL);
|
||
|
||
dyncon = (Elf32_External_Dyn *) sdyn->contents;
|
||
dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
|
||
|
||
for (; dyncon < dynconend; dyncon++)
|
||
{
|
||
Elf_Internal_Dyn dyn;
|
||
|
||
bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
|
||
|
||
switch (dyn.d_tag)
|
||
{
|
||
default:
|
||
break;
|
||
|
||
case DT_PLTGOT:
|
||
dyn.d_un.d_ptr = bfinfdpic_got_section (info)->output_section->vma
|
||
+ bfinfdpic_got_section (info)->output_offset
|
||
+ bfinfdpic_got_initial_offset (info);
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
|
||
case DT_JMPREL:
|
||
dyn.d_un.d_ptr = bfinfdpic_pltrel_section (info)
|
||
->output_section->vma
|
||
+ bfinfdpic_pltrel_section (info)->output_offset;
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
|
||
case DT_PLTRELSZ:
|
||
dyn.d_un.d_val = bfinfdpic_pltrel_section (info)->size;
|
||
bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Adjust a symbol defined by a dynamic object and referenced by a
|
||
regular object. */
|
||
|
||
static bfd_boolean
|
||
elf32_bfinfdpic_adjust_dynamic_symbol
|
||
(struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
||
struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
|
||
{
|
||
bfd * dynobj;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
|
||
/* Make sure we know what is going on here. */
|
||
BFD_ASSERT (dynobj != NULL
|
||
&& (h->u.weakdef != NULL
|
||
|| (h->def_dynamic
|
||
&& h->ref_regular
|
||
&& !h->def_regular)));
|
||
|
||
/* If this is a weak symbol, and there is a real definition, the
|
||
processor independent code will have arranged for us to see the
|
||
real definition first, and we can just use the same value. */
|
||
if (h->u.weakdef != NULL)
|
||
{
|
||
BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
|
||
|| h->u.weakdef->root.type == bfd_link_hash_defweak);
|
||
h->root.u.def.section = h->u.weakdef->root.u.def.section;
|
||
h->root.u.def.value = h->u.weakdef->root.u.def.value;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Perform any actions needed for dynamic symbols. */
|
||
|
||
static bfd_boolean
|
||
elf32_bfinfdpic_finish_dynamic_symbol
|
||
(bfd *output_bfd ATTRIBUTE_UNUSED,
|
||
struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
||
struct elf_link_hash_entry *h ATTRIBUTE_UNUSED,
|
||
Elf_Internal_Sym *sym ATTRIBUTE_UNUSED)
|
||
{
|
||
return TRUE;
|
||
}
|
||
|
||
/* Decide whether to attempt to turn absptr or lsda encodings in
|
||
shared libraries into pcrel within the given input section. */
|
||
|
||
static bfd_boolean
|
||
bfinfdpic_elf_use_relative_eh_frame
|
||
(bfd *input_bfd ATTRIBUTE_UNUSED,
|
||
struct bfd_link_info *info ATTRIBUTE_UNUSED,
|
||
asection *eh_frame_section ATTRIBUTE_UNUSED)
|
||
{
|
||
/* We can't use PC-relative encodings in FDPIC binaries, in general. */
|
||
return FALSE;
|
||
}
|
||
|
||
/* Adjust the contents of an eh_frame_hdr section before they're output. */
|
||
|
||
static bfd_byte
|
||
bfinfdpic_elf_encode_eh_address (bfd *abfd,
|
||
struct bfd_link_info *info,
|
||
asection *osec, bfd_vma offset,
|
||
asection *loc_sec, bfd_vma loc_offset,
|
||
bfd_vma *encoded)
|
||
{
|
||
struct elf_link_hash_entry *h;
|
||
|
||
h = elf_hash_table (info)->hgot;
|
||
BFD_ASSERT (h && h->root.type == bfd_link_hash_defined);
|
||
|
||
if (! h || (_bfinfdpic_osec_to_segment (abfd, osec)
|
||
== _bfinfdpic_osec_to_segment (abfd, loc_sec->output_section)))
|
||
return _bfd_elf_encode_eh_address (abfd, info, osec, offset,
|
||
loc_sec, loc_offset, encoded);
|
||
|
||
BFD_ASSERT (_bfinfdpic_osec_to_segment (abfd, osec)
|
||
== (_bfinfdpic_osec_to_segment
|
||
(abfd, h->root.u.def.section->output_section)));
|
||
|
||
*encoded = osec->vma + offset
|
||
- (h->root.u.def.value
|
||
+ h->root.u.def.section->output_section->vma
|
||
+ h->root.u.def.section->output_offset);
|
||
|
||
return DW_EH_PE_datarel | DW_EH_PE_sdata4;
|
||
}
|
||
|
||
|
||
|
||
/* Look through the relocs for a section during the first phase.
|
||
|
||
Besides handling virtual table relocs for gc, we have to deal with
|
||
all sorts of PIC-related relocations. We describe below the
|
||
general plan on how to handle such relocations, even though we only
|
||
collect information at this point, storing them in hash tables for
|
||
perusal of later passes.
|
||
|
||
32 relocations are propagated to the linker output when creating
|
||
position-independent output. LO16 and HI16 relocations are not
|
||
supposed to be encountered in this case.
|
||
|
||
LABEL16 should always be resolvable by the linker, since it's only
|
||
used by branches.
|
||
|
||
LABEL24, on the other hand, is used by calls. If it turns out that
|
||
the target of a call is a dynamic symbol, a PLT entry must be
|
||
created for it, which triggers the creation of a private function
|
||
descriptor and, unless lazy binding is disabled, a lazy PLT entry.
|
||
|
||
GPREL relocations require the referenced symbol to be in the same
|
||
segment as _gp, but this can only be checked later.
|
||
|
||
All GOT, GOTOFF and FUNCDESC relocations require a .got section to
|
||
exist. LABEL24 might as well, since it may require a PLT entry,
|
||
that will require a got.
|
||
|
||
Non-FUNCDESC GOT relocations require a GOT entry to be created
|
||
regardless of whether the symbol is dynamic. However, since a
|
||
global symbol that turns out to not be exported may have the same
|
||
address of a non-dynamic symbol, we don't assign GOT entries at
|
||
this point, such that we can share them in this case. A relocation
|
||
for the GOT entry always has to be created, be it to offset a
|
||
private symbol by the section load address, be it to get the symbol
|
||
resolved dynamically.
|
||
|
||
FUNCDESC GOT relocations require a GOT entry to be created, and
|
||
handled as if a FUNCDESC relocation was applied to the GOT entry in
|
||
an object file.
|
||
|
||
FUNCDESC relocations referencing a symbol that turns out to NOT be
|
||
dynamic cause a private function descriptor to be created. The
|
||
FUNCDESC relocation then decays to a 32 relocation that points at
|
||
the private descriptor. If the symbol is dynamic, the FUNCDESC
|
||
relocation is propagated to the linker output, such that the
|
||
dynamic linker creates the canonical descriptor, pointing to the
|
||
dynamically-resolved definition of the function.
|
||
|
||
Non-FUNCDESC GOTOFF relocations must always refer to non-dynamic
|
||
symbols that are assigned to the same segment as the GOT, but we
|
||
can only check this later, after we know the complete set of
|
||
symbols defined and/or exported.
|
||
|
||
FUNCDESC GOTOFF relocations require a function descriptor to be
|
||
created and, unless lazy binding is disabled or the symbol is not
|
||
dynamic, a lazy PLT entry. Since we can't tell at this point
|
||
whether a symbol is going to be dynamic, we have to decide later
|
||
whether to create a lazy PLT entry or bind the descriptor directly
|
||
to the private function.
|
||
|
||
FUNCDESC_VALUE relocations are not supposed to be present in object
|
||
files, but they may very well be simply propagated to the linker
|
||
output, since they have no side effect.
|
||
|
||
|
||
A function descriptor always requires a FUNCDESC_VALUE relocation.
|
||
Whether it's in .plt.rel or not depends on whether lazy binding is
|
||
enabled and on whether the referenced symbol is dynamic.
|
||
|
||
The existence of a lazy PLT requires the resolverStub lazy PLT
|
||
entry to be present.
|
||
|
||
|
||
As for assignment of GOT, PLT and lazy PLT entries, and private
|
||
descriptors, we might do them all sequentially, but we can do
|
||
better than that. For example, we can place GOT entries and
|
||
private function descriptors referenced using 12-bit operands
|
||
closer to the PIC register value, such that these relocations don't
|
||
overflow. Those that are only referenced with LO16 relocations
|
||
could come next, but we may as well place PLT-required function
|
||
descriptors in the 12-bit range to make them shorter. Symbols
|
||
referenced with LO16/HI16 may come next, but we may place
|
||
additional function descriptors in the 16-bit range if we can
|
||
reliably tell that we've already placed entries that are ever
|
||
referenced with only LO16. PLT entries are therefore generated as
|
||
small as possible, while not introducing relocation overflows in
|
||
GOT or FUNCDESC_GOTOFF relocations. Lazy PLT entries could be
|
||
generated before or after PLT entries, but not intermingled with
|
||
them, such that we can have more lazy PLT entries in range for a
|
||
branch to the resolverStub. The resolverStub should be emitted at
|
||
the most distant location from the first lazy PLT entry such that
|
||
it's still in range for a branch, or closer, if there isn't a need
|
||
for so many lazy PLT entries. Additional lazy PLT entries may be
|
||
emitted after the resolverStub, as long as branches are still in
|
||
range. If the branch goes out of range, longer lazy PLT entries
|
||
are emitted.
|
||
|
||
We could further optimize PLT and lazy PLT entries by giving them
|
||
priority in assignment to closer-to-gr17 locations depending on the
|
||
number of occurrences of references to them (assuming a function
|
||
that's called more often is more important for performance, so its
|
||
PLT entry should be faster), or taking hints from the compiler.
|
||
Given infinite time and money... :-) */
|
||
|
||
static bfd_boolean
|
||
bfinfdpic_check_relocs (bfd *abfd, struct bfd_link_info *info,
|
||
asection *sec, const Elf_Internal_Rela *relocs)
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
|
||
const Elf_Internal_Rela *rel;
|
||
const Elf_Internal_Rela *rel_end;
|
||
bfd *dynobj;
|
||
struct bfinfdpic_relocs_info *picrel;
|
||
|
||
if (info->relocatable)
|
||
return TRUE;
|
||
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (abfd);
|
||
sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
|
||
if (!elf_bad_symtab (abfd))
|
||
sym_hashes_end -= symtab_hdr->sh_info;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
rel_end = relocs + sec->reloc_count;
|
||
for (rel = relocs; rel < rel_end; rel++)
|
||
{
|
||
struct elf_link_hash_entry *h;
|
||
unsigned long r_symndx;
|
||
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
if (r_symndx < symtab_hdr->sh_info)
|
||
h = NULL;
|
||
else
|
||
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
|
||
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
case R_BFIN_GOT17M4:
|
||
case R_BFIN_GOTHI:
|
||
case R_BFIN_GOTLO:
|
||
case R_BFIN_FUNCDESC_GOT17M4:
|
||
case R_BFIN_FUNCDESC_GOTHI:
|
||
case R_BFIN_FUNCDESC_GOTLO:
|
||
case R_BFIN_GOTOFF17M4:
|
||
case R_BFIN_GOTOFFHI:
|
||
case R_BFIN_GOTOFFLO:
|
||
case R_BFIN_FUNCDESC_GOTOFF17M4:
|
||
case R_BFIN_FUNCDESC_GOTOFFHI:
|
||
case R_BFIN_FUNCDESC_GOTOFFLO:
|
||
case R_BFIN_FUNCDESC:
|
||
case R_BFIN_FUNCDESC_VALUE:
|
||
if (! IS_FDPIC (abfd))
|
||
goto bad_reloc;
|
||
/* Fall through. */
|
||
case R_pcrel24:
|
||
case R_pcrel24_jump_l:
|
||
case R_byte4_data:
|
||
if (IS_FDPIC (abfd) && ! dynobj)
|
||
{
|
||
elf_hash_table (info)->dynobj = dynobj = abfd;
|
||
if (! _bfin_create_got_section (abfd, info))
|
||
return FALSE;
|
||
}
|
||
if (! IS_FDPIC (abfd))
|
||
{
|
||
picrel = NULL;
|
||
break;
|
||
}
|
||
if (h != NULL)
|
||
{
|
||
if (h->dynindx == -1)
|
||
switch (ELF_ST_VISIBILITY (h->other))
|
||
{
|
||
case STV_INTERNAL:
|
||
case STV_HIDDEN:
|
||
break;
|
||
default:
|
||
bfd_elf_link_record_dynamic_symbol (info, h);
|
||
break;
|
||
}
|
||
picrel
|
||
= bfinfdpic_relocs_info_for_global (bfinfdpic_relocs_info (info),
|
||
abfd, h,
|
||
rel->r_addend, INSERT);
|
||
}
|
||
else
|
||
picrel = bfinfdpic_relocs_info_for_local (bfinfdpic_relocs_info
|
||
(info), abfd, r_symndx,
|
||
rel->r_addend, INSERT);
|
||
if (! picrel)
|
||
return FALSE;
|
||
break;
|
||
|
||
default:
|
||
picrel = NULL;
|
||
break;
|
||
}
|
||
|
||
switch (ELF32_R_TYPE (rel->r_info))
|
||
{
|
||
case R_pcrel24:
|
||
case R_pcrel24_jump_l:
|
||
if (IS_FDPIC (abfd))
|
||
picrel->call = 1;
|
||
break;
|
||
|
||
case R_BFIN_FUNCDESC_VALUE:
|
||
picrel->relocsfdv++;
|
||
if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
|
||
picrel->relocs32--;
|
||
/* Fall through. */
|
||
|
||
case R_byte4_data:
|
||
if (! IS_FDPIC (abfd))
|
||
break;
|
||
|
||
picrel->sym = 1;
|
||
if (bfd_get_section_flags (abfd, sec) & SEC_ALLOC)
|
||
picrel->relocs32++;
|
||
break;
|
||
|
||
case R_BFIN_GOT17M4:
|
||
picrel->got17m4 = 1;
|
||
break;
|
||
|
||
case R_BFIN_GOTHI:
|
||
case R_BFIN_GOTLO:
|
||
picrel->gothilo = 1;
|
||
break;
|
||
|
||
case R_BFIN_FUNCDESC_GOT17M4:
|
||
picrel->fdgot17m4 = 1;
|
||
break;
|
||
|
||
case R_BFIN_FUNCDESC_GOTHI:
|
||
case R_BFIN_FUNCDESC_GOTLO:
|
||
picrel->fdgothilo = 1;
|
||
break;
|
||
|
||
case R_BFIN_GOTOFF17M4:
|
||
case R_BFIN_GOTOFFHI:
|
||
case R_BFIN_GOTOFFLO:
|
||
picrel->gotoff = 1;
|
||
break;
|
||
|
||
case R_BFIN_FUNCDESC_GOTOFF17M4:
|
||
picrel->fdgoff17m4 = 1;
|
||
break;
|
||
|
||
case R_BFIN_FUNCDESC_GOTOFFHI:
|
||
case R_BFIN_FUNCDESC_GOTOFFLO:
|
||
picrel->fdgoffhilo = 1;
|
||
break;
|
||
|
||
case R_BFIN_FUNCDESC:
|
||
picrel->fd = 1;
|
||
picrel->relocsfd++;
|
||
break;
|
||
|
||
/* This relocation describes the C++ object vtable hierarchy.
|
||
Reconstruct it for later use during GC. */
|
||
case R_BFIN_GNU_VTINHERIT:
|
||
if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
|
||
return FALSE;
|
||
break;
|
||
|
||
/* This relocation describes which C++ vtable entries are actually
|
||
used. Record for later use during GC. */
|
||
case R_BFIN_GNU_VTENTRY:
|
||
if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
|
||
return FALSE;
|
||
break;
|
||
|
||
case R_huimm16:
|
||
case R_luimm16:
|
||
case R_pcrel12_jump_s:
|
||
case R_pcrel10:
|
||
break;
|
||
|
||
default:
|
||
bad_reloc:
|
||
(*_bfd_error_handler)
|
||
(_("%B: unsupported relocation type %i"),
|
||
abfd, ELF32_R_TYPE (rel->r_info));
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Set the right machine number for a Blackfin ELF file. */
|
||
|
||
static bfd_boolean
|
||
elf32_bfin_object_p (bfd *abfd)
|
||
{
|
||
bfd_default_set_arch_mach (abfd, bfd_arch_bfin, 0);
|
||
return (((elf_elfheader (abfd)->e_flags & EF_BFIN_FDPIC) != 0)
|
||
== (IS_FDPIC (abfd)));
|
||
}
|
||
|
||
static bfd_boolean
|
||
elf32_bfin_set_private_flags (bfd * abfd, flagword flags)
|
||
{
|
||
elf_elfheader (abfd)->e_flags = flags;
|
||
elf_flags_init (abfd) = TRUE;
|
||
return TRUE;
|
||
}
|
||
|
||
/* Copy backend specific data from one object module to another. */
|
||
|
||
static bfd_boolean
|
||
bfin_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
|
||
{
|
||
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
||
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
||
return TRUE;
|
||
|
||
BFD_ASSERT (!elf_flags_init (obfd)
|
||
|| elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
|
||
|
||
elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
|
||
elf_flags_init (obfd) = TRUE;
|
||
return TRUE;
|
||
}
|
||
|
||
static bfd_boolean
|
||
elf32_bfinfdpic_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
|
||
{
|
||
unsigned i;
|
||
|
||
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|
||
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
|
||
return TRUE;
|
||
|
||
if (! bfin_elf_copy_private_bfd_data (ibfd, obfd))
|
||
return FALSE;
|
||
|
||
if (! elf_tdata (ibfd) || ! elf_tdata (ibfd)->phdr
|
||
|| ! elf_tdata (obfd) || ! elf_tdata (obfd)->phdr)
|
||
return TRUE;
|
||
|
||
/* Copy the stack size. */
|
||
for (i = 0; i < elf_elfheader (ibfd)->e_phnum; i++)
|
||
if (elf_tdata (ibfd)->phdr[i].p_type == PT_GNU_STACK)
|
||
{
|
||
Elf_Internal_Phdr *iphdr = &elf_tdata (ibfd)->phdr[i];
|
||
|
||
for (i = 0; i < elf_elfheader (obfd)->e_phnum; i++)
|
||
if (elf_tdata (obfd)->phdr[i].p_type == PT_GNU_STACK)
|
||
{
|
||
memcpy (&elf_tdata (obfd)->phdr[i], iphdr, sizeof (*iphdr));
|
||
|
||
/* Rewrite the phdrs, since we're only called after they
|
||
were first written. */
|
||
if (bfd_seek (obfd, (bfd_signed_vma) get_elf_backend_data (obfd)
|
||
->s->sizeof_ehdr, SEEK_SET) != 0
|
||
|| get_elf_backend_data (obfd)->s
|
||
->write_out_phdrs (obfd, elf_tdata (obfd)->phdr,
|
||
elf_elfheader (obfd)->e_phnum) != 0)
|
||
return FALSE;
|
||
break;
|
||
}
|
||
|
||
break;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
|
||
/* Display the flags field. */
|
||
static bfd_boolean
|
||
elf32_bfin_print_private_bfd_data (bfd * abfd, PTR ptr)
|
||
{
|
||
FILE *file = (FILE *) ptr;
|
||
flagword flags;
|
||
|
||
BFD_ASSERT (abfd != NULL && ptr != NULL);
|
||
|
||
/* Print normal ELF private data. */
|
||
_bfd_elf_print_private_bfd_data (abfd, ptr);
|
||
|
||
flags = elf_elfheader (abfd)->e_flags;
|
||
|
||
/* xgettext:c-format */
|
||
fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
|
||
|
||
if (flags & EF_BFIN_PIC)
|
||
fprintf (file, " -fpic");
|
||
|
||
if (flags & EF_BFIN_FDPIC)
|
||
fprintf (file, " -mfdpic");
|
||
|
||
fputc ('\n', file);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Merge backend specific data from an object file to the output
|
||
object file when linking. */
|
||
|
||
static bfd_boolean
|
||
elf32_bfin_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
|
||
{
|
||
flagword old_flags, old_partial;
|
||
flagword new_flags, new_partial;
|
||
bfd_boolean error = FALSE;
|
||
|
||
new_flags = elf_elfheader (ibfd)->e_flags;
|
||
old_flags = elf_elfheader (obfd)->e_flags;
|
||
|
||
if (new_flags & EF_BFIN_FDPIC)
|
||
new_flags &= ~EF_BFIN_PIC;
|
||
|
||
#ifdef DEBUG
|
||
(*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
|
||
old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no",
|
||
bfd_get_filename (ibfd));
|
||
#endif
|
||
|
||
if (!elf_flags_init (obfd)) /* First call, no flags set. */
|
||
{
|
||
elf_flags_init (obfd) = TRUE;
|
||
old_flags = new_flags;
|
||
}
|
||
|
||
else if (new_flags == old_flags) /* Compatible flags are ok. */
|
||
;
|
||
|
||
else /* Possibly incompatible flags. */
|
||
{
|
||
/* We don't have to do anything if the pic flags are the same, or the new
|
||
module(s) were compiled with -mlibrary-pic. */
|
||
new_partial = (new_flags & EF_BFIN_PIC_FLAGS);
|
||
old_partial = (old_flags & EF_BFIN_PIC_FLAGS);
|
||
if (new_partial == old_partial)
|
||
;
|
||
|
||
/* If we have mixtures of -fpic and -fPIC, or in both bits. */
|
||
else if (new_partial != 0 && old_partial != 0)
|
||
old_flags |= new_partial;
|
||
|
||
/* One module was compiled for pic and the other was not, see if we have
|
||
had any relocations that are not pic-safe. */
|
||
else
|
||
old_flags |= new_partial;
|
||
|
||
}
|
||
|
||
/* Update the old flags now with changes made above. */
|
||
elf_elfheader (obfd)->e_flags = old_flags;
|
||
|
||
if (((new_flags & EF_BFIN_FDPIC) == 0)
|
||
!= (! IS_FDPIC (ibfd)))
|
||
{
|
||
error = TRUE;
|
||
if (IS_FDPIC (obfd))
|
||
(*_bfd_error_handler)
|
||
(_("%s: cannot link non-fdpic object file into fdpic executable"),
|
||
bfd_get_filename (ibfd));
|
||
else
|
||
(*_bfd_error_handler)
|
||
(_("%s: cannot link fdpic object file into non-fdpic executable"),
|
||
bfd_get_filename (ibfd));
|
||
}
|
||
|
||
if (error)
|
||
bfd_set_error (bfd_error_bad_value);
|
||
|
||
return !error;
|
||
}
|
||
|
||
/* bfin ELF linker hash entry. */
|
||
|
||
struct bfin_link_hash_entry
|
||
{
|
||
struct elf_link_hash_entry root;
|
||
|
||
/* Number of PC relative relocs copied for this symbol. */
|
||
struct bfin_pcrel_relocs_copied *pcrel_relocs_copied;
|
||
};
|
||
|
||
/* bfin ELF linker hash table. */
|
||
|
||
struct bfin_link_hash_table
|
||
{
|
||
struct elf_link_hash_table root;
|
||
|
||
/* Small local sym to section mapping cache. */
|
||
struct sym_sec_cache sym_sec;
|
||
};
|
||
|
||
#define bfin_hash_entry(ent) ((struct bfin_link_hash_entry *) (ent))
|
||
|
||
static struct bfd_hash_entry *
|
||
bfin_link_hash_newfunc (struct bfd_hash_entry *entry,
|
||
struct bfd_hash_table *table, const char *string)
|
||
{
|
||
struct bfd_hash_entry *ret = entry;
|
||
|
||
/* Allocate the structure if it has not already been allocated by a
|
||
subclass. */
|
||
if (ret == NULL)
|
||
ret = bfd_hash_allocate (table, sizeof (struct bfin_link_hash_entry));
|
||
if (ret == NULL)
|
||
return ret;
|
||
|
||
/* Call the allocation method of the superclass. */
|
||
ret = _bfd_elf_link_hash_newfunc (ret, table, string);
|
||
if (ret != NULL)
|
||
bfin_hash_entry (ret)->pcrel_relocs_copied = NULL;
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* Create an bfin ELF linker hash table. */
|
||
|
||
static struct bfd_link_hash_table *
|
||
bfin_link_hash_table_create (bfd * abfd)
|
||
{
|
||
struct bfin_link_hash_table *ret;
|
||
bfd_size_type amt = sizeof (struct bfin_link_hash_table);
|
||
|
||
ret = bfd_zalloc (abfd, amt);
|
||
if (ret == NULL)
|
||
return NULL;
|
||
|
||
if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
|
||
bfin_link_hash_newfunc,
|
||
sizeof (struct elf_link_hash_entry)))
|
||
{
|
||
free (ret);
|
||
return NULL;
|
||
}
|
||
|
||
ret->sym_sec.abfd = NULL;
|
||
|
||
return &ret->root.root;
|
||
}
|
||
|
||
/* The size in bytes of an entry in the procedure linkage table. */
|
||
|
||
/* Finish up the dynamic sections. */
|
||
|
||
static bfd_boolean
|
||
bfin_finish_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
|
||
struct bfd_link_info *info)
|
||
{
|
||
bfd *dynobj;
|
||
asection *sdyn;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
|
||
sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
Elf32_External_Dyn *dyncon, *dynconend;
|
||
|
||
BFD_ASSERT (sdyn != NULL);
|
||
|
||
dyncon = (Elf32_External_Dyn *) sdyn->contents;
|
||
dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
|
||
for (; dyncon < dynconend; dyncon++)
|
||
{
|
||
Elf_Internal_Dyn dyn;
|
||
|
||
bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
|
||
|
||
}
|
||
|
||
}
|
||
return TRUE;
|
||
}
|
||
|
||
/* Finish up dynamic symbol handling. We set the contents of various
|
||
dynamic sections here. */
|
||
|
||
static bfd_boolean
|
||
bfin_finish_dynamic_symbol (bfd * output_bfd,
|
||
struct bfd_link_info *info,
|
||
struct elf_link_hash_entry *h,
|
||
Elf_Internal_Sym * sym)
|
||
{
|
||
bfd *dynobj;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
|
||
if (h->got.offset != (bfd_vma) - 1)
|
||
{
|
||
asection *sgot;
|
||
asection *srela;
|
||
Elf_Internal_Rela rela;
|
||
bfd_byte *loc;
|
||
|
||
/* This symbol has an entry in the global offset table.
|
||
Set it up. */
|
||
|
||
sgot = bfd_get_section_by_name (dynobj, ".got");
|
||
srela = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
BFD_ASSERT (sgot != NULL && srela != NULL);
|
||
|
||
rela.r_offset = (sgot->output_section->vma
|
||
+ sgot->output_offset
|
||
+ (h->got.offset & ~(bfd_vma) 1));
|
||
|
||
/* If this is a -Bsymbolic link, and the symbol is defined
|
||
locally, we just want to emit a RELATIVE reloc. Likewise if
|
||
the symbol was forced to be local because of a version file.
|
||
The entry in the global offset table will already have been
|
||
initialized in the relocate_section function. */
|
||
if (info->shared
|
||
&& (info->symbolic
|
||
|| h->dynindx == -1 || h->forced_local) && h->def_regular)
|
||
{
|
||
fprintf(stderr, "*** check this relocation %s\n", __FUNCTION__);
|
||
rela.r_info = ELF32_R_INFO (0, R_pcrel24);
|
||
rela.r_addend = bfd_get_signed_32 (output_bfd,
|
||
(sgot->contents
|
||
+
|
||
(h->got.
|
||
offset & ~(bfd_vma) 1)));
|
||
}
|
||
else
|
||
{
|
||
bfd_put_32 (output_bfd, (bfd_vma) 0,
|
||
sgot->contents + (h->got.offset & ~(bfd_vma) 1));
|
||
rela.r_info = ELF32_R_INFO (h->dynindx, R_got);
|
||
rela.r_addend = 0;
|
||
}
|
||
|
||
loc = srela->contents;
|
||
loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
|
||
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
|
||
}
|
||
|
||
if (h->needs_copy)
|
||
{
|
||
BFD_ASSERT (0);
|
||
}
|
||
/* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */
|
||
if (strcmp (h->root.root.string, "_DYNAMIC") == 0
|
||
|| h == elf_hash_table (info)->hgot)
|
||
sym->st_shndx = SHN_ABS;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Adjust a symbol defined by a dynamic object and referenced by a
|
||
regular object. The current definition is in some section of the
|
||
dynamic object, but we're not including those sections. We have to
|
||
change the definition to something the rest of the link can
|
||
understand. */
|
||
|
||
static bfd_boolean
|
||
bfin_adjust_dynamic_symbol (struct bfd_link_info *info,
|
||
struct elf_link_hash_entry *h)
|
||
{
|
||
bfd *dynobj;
|
||
asection *s;
|
||
unsigned int power_of_two;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
|
||
/* Make sure we know what is going on here. */
|
||
BFD_ASSERT (dynobj != NULL
|
||
&& (h->needs_plt
|
||
|| h->u.weakdef != NULL
|
||
|| (h->def_dynamic && h->ref_regular && !h->def_regular)));
|
||
|
||
/* If this is a function, put it in the procedure linkage table. We
|
||
will fill in the contents of the procedure linkage table later,
|
||
when we know the address of the .got section. */
|
||
if (h->type == STT_FUNC || h->needs_plt)
|
||
{
|
||
BFD_ASSERT(0);
|
||
}
|
||
|
||
/* If this is a weak symbol, and there is a real definition, the
|
||
processor independent code will have arranged for us to see the
|
||
real definition first, and we can just use the same value. */
|
||
if (h->u.weakdef != NULL)
|
||
{
|
||
BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
|
||
|| h->u.weakdef->root.type == bfd_link_hash_defweak);
|
||
h->root.u.def.section = h->u.weakdef->root.u.def.section;
|
||
h->root.u.def.value = h->u.weakdef->root.u.def.value;
|
||
return TRUE;
|
||
}
|
||
|
||
/* This is a reference to a symbol defined by a dynamic object which
|
||
is not a function. */
|
||
|
||
/* If we are creating a shared library, we must presume that the
|
||
only references to the symbol are via the global offset table.
|
||
For such cases we need not do anything here; the relocations will
|
||
be handled correctly by relocate_section. */
|
||
if (info->shared)
|
||
return TRUE;
|
||
|
||
/* We must allocate the symbol in our .dynbss section, which will
|
||
become part of the .bss section of the executable. There will be
|
||
an entry for this symbol in the .dynsym section. The dynamic
|
||
object will contain position independent code, so all references
|
||
from the dynamic object to this symbol will go through the global
|
||
offset table. The dynamic linker will use the .dynsym entry to
|
||
determine the address it must put in the global offset table, so
|
||
both the dynamic object and the regular object will refer to the
|
||
same memory location for the variable. */
|
||
|
||
s = bfd_get_section_by_name (dynobj, ".dynbss");
|
||
BFD_ASSERT (s != NULL);
|
||
|
||
/* We must generate a R_68K_COPY reloc to tell the dynamic linker to
|
||
copy the initial value out of the dynamic object and into the
|
||
runtime process image. We need to remember the offset into the
|
||
.rela.bss section we are going to use. */
|
||
if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
|
||
{
|
||
asection *srel;
|
||
|
||
srel = bfd_get_section_by_name (dynobj, ".rela.bss");
|
||
BFD_ASSERT (srel != NULL);
|
||
srel->size += sizeof (Elf32_External_Rela);
|
||
h->needs_copy = 1;
|
||
}
|
||
|
||
/* We need to figure out the alignment required for this symbol. I
|
||
have no idea how ELF linkers handle this. */
|
||
power_of_two = bfd_log2 (h->size);
|
||
if (power_of_two > 3)
|
||
power_of_two = 3;
|
||
|
||
/* Apply the required alignment. */
|
||
s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
|
||
if (power_of_two > bfd_get_section_alignment (dynobj, s))
|
||
{
|
||
if (!bfd_set_section_alignment (dynobj, s, power_of_two))
|
||
return FALSE;
|
||
}
|
||
|
||
/* Define the symbol as being at this point in the section. */
|
||
h->root.u.def.section = s;
|
||
h->root.u.def.value = s->size;
|
||
|
||
/* Increment the section size to make room for the symbol. */
|
||
s->size += h->size;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* The bfin linker needs to keep track of the number of relocs that it
|
||
decides to copy in check_relocs for each symbol. This is so that it
|
||
can discard PC relative relocs if it doesn't need them when linking
|
||
with -Bsymbolic. We store the information in a field extending the
|
||
regular ELF linker hash table. */
|
||
|
||
/* This structure keeps track of the number of PC relative relocs we have
|
||
copied for a given symbol. */
|
||
|
||
struct bfin_pcrel_relocs_copied
|
||
{
|
||
/* Next section. */
|
||
struct bfin_pcrel_relocs_copied *next;
|
||
/* A section in dynobj. */
|
||
asection *section;
|
||
/* Number of relocs copied in this section. */
|
||
bfd_size_type count;
|
||
};
|
||
|
||
/* This function is called via elf_link_hash_traverse if we are
|
||
creating a shared object. In the -Bsymbolic case it discards the
|
||
space allocated to copy PC relative relocs against symbols which
|
||
are defined in regular objects. For the normal shared case, it
|
||
discards space for pc-relative relocs that have become local due to
|
||
symbol visibility changes. We allocated space for them in the
|
||
check_relocs routine, but we won't fill them in in the
|
||
relocate_section routine.
|
||
|
||
We also check whether any of the remaining relocations apply
|
||
against a readonly section, and set the DF_TEXTREL flag in this
|
||
case. */
|
||
|
||
static bfd_boolean
|
||
bfin_discard_copies (struct elf_link_hash_entry *h, PTR inf)
|
||
{
|
||
struct bfd_link_info *info = (struct bfd_link_info *) inf;
|
||
struct bfin_pcrel_relocs_copied *s;
|
||
|
||
if (h->root.type == bfd_link_hash_warning)
|
||
h = (struct elf_link_hash_entry *) h->root.u.i.link;
|
||
|
||
if (!h->def_regular || (!info->symbolic && !h->forced_local))
|
||
{
|
||
if ((info->flags & DF_TEXTREL) == 0)
|
||
{
|
||
/* Look for relocations against read-only sections. */
|
||
for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
|
||
s != NULL; s = s->next)
|
||
if ((s->section->flags & SEC_READONLY) != 0)
|
||
{
|
||
info->flags |= DF_TEXTREL;
|
||
break;
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
for (s = bfin_hash_entry (h)->pcrel_relocs_copied;
|
||
s != NULL; s = s->next)
|
||
s->section->size -= s->count * sizeof (Elf32_External_Rela);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
static bfd_boolean
|
||
bfin_size_dynamic_sections (bfd * output_bfd ATTRIBUTE_UNUSED,
|
||
struct bfd_link_info *info)
|
||
{
|
||
bfd *dynobj;
|
||
asection *s;
|
||
bfd_boolean relocs;
|
||
|
||
dynobj = elf_hash_table (info)->dynobj;
|
||
BFD_ASSERT (dynobj != NULL);
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
/* Set the contents of the .interp section to the interpreter. */
|
||
if (info->executable)
|
||
{
|
||
s = bfd_get_section_by_name (dynobj, ".interp");
|
||
BFD_ASSERT (s != NULL);
|
||
s->size = sizeof ELF_DYNAMIC_INTERPRETER;
|
||
s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* We may have created entries in the .rela.got section.
|
||
However, if we are not creating the dynamic sections, we will
|
||
not actually use these entries. Reset the size of .rela.got,
|
||
which will cause it to get stripped from the output file
|
||
below. */
|
||
s = bfd_get_section_by_name (dynobj, ".rela.got");
|
||
if (s != NULL)
|
||
s->size = 0;
|
||
}
|
||
|
||
/* If this is a -Bsymbolic shared link, then we need to discard all
|
||
PC relative relocs against symbols defined in a regular object.
|
||
For the normal shared case we discard the PC relative relocs
|
||
against symbols that have become local due to visibility changes.
|
||
We allocated space for them in the check_relocs routine, but we
|
||
will not fill them in in the relocate_section routine. */
|
||
if (info->shared)
|
||
elf_link_hash_traverse (elf_hash_table (info),
|
||
bfin_discard_copies, (PTR) info);
|
||
|
||
/* The check_relocs and adjust_dynamic_symbol entry points have
|
||
determined the sizes of the various dynamic sections. Allocate
|
||
memory for them. */
|
||
relocs = FALSE;
|
||
for (s = dynobj->sections; s != NULL; s = s->next)
|
||
{
|
||
const char *name;
|
||
bfd_boolean strip;
|
||
|
||
if ((s->flags & SEC_LINKER_CREATED) == 0)
|
||
continue;
|
||
|
||
/* It's OK to base decisions on the section name, because none
|
||
of the dynobj section names depend upon the input files. */
|
||
name = bfd_get_section_name (dynobj, s);
|
||
|
||
strip = FALSE;
|
||
|
||
if (strncmp (name, ".rela", 5) == 0)
|
||
{
|
||
if (s->size == 0)
|
||
{
|
||
/* If we don't need this section, strip it from the
|
||
output file. This is mostly to handle .rela.bss and
|
||
.rela.plt. We must create both sections in
|
||
create_dynamic_sections, because they must be created
|
||
before the linker maps input sections to output
|
||
sections. The linker does that before
|
||
adjust_dynamic_symbol is called, and it is that
|
||
function which decides whether anything needs to go
|
||
into these sections. */
|
||
strip = TRUE;
|
||
}
|
||
else
|
||
{
|
||
relocs = TRUE;
|
||
|
||
/* We use the reloc_count field as a counter if we need
|
||
to copy relocs into the output file. */
|
||
s->reloc_count = 0;
|
||
}
|
||
}
|
||
else if (strncmp (name, ".got", 4) != 0)
|
||
{
|
||
/* It's not one of our sections, so don't allocate space. */
|
||
continue;
|
||
}
|
||
|
||
if (strip)
|
||
{
|
||
s->flags |= SEC_EXCLUDE;
|
||
continue;
|
||
}
|
||
|
||
/* Allocate memory for the section contents. */
|
||
/* FIXME: This should be a call to bfd_alloc not bfd_zalloc.
|
||
Unused entries should be reclaimed before the section's contents
|
||
are written out, but at the moment this does not happen. Thus in
|
||
order to prevent writing out garbage, we initialise the section's
|
||
contents to zero. */
|
||
s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
|
||
if (s->contents == NULL && s->size != 0)
|
||
return FALSE;
|
||
}
|
||
|
||
if (elf_hash_table (info)->dynamic_sections_created)
|
||
{
|
||
/* Add some entries to the .dynamic section. We fill in the
|
||
values later, in bfin_finish_dynamic_sections, but we
|
||
must add the entries now so that we get the correct size for
|
||
the .dynamic section. The DT_DEBUG entry is filled in by the
|
||
dynamic linker and used by the debugger. */
|
||
#define add_dynamic_entry(TAG, VAL) \
|
||
_bfd_elf_add_dynamic_entry (info, TAG, VAL)
|
||
|
||
if (!info->shared)
|
||
{
|
||
if (!add_dynamic_entry (DT_DEBUG, 0))
|
||
return FALSE;
|
||
}
|
||
|
||
|
||
if (relocs)
|
||
{
|
||
if (!add_dynamic_entry (DT_RELA, 0)
|
||
|| !add_dynamic_entry (DT_RELASZ, 0)
|
||
|| !add_dynamic_entry (DT_RELAENT,
|
||
sizeof (Elf32_External_Rela)))
|
||
return FALSE;
|
||
}
|
||
|
||
if ((info->flags & DF_TEXTREL) != 0)
|
||
{
|
||
if (!add_dynamic_entry (DT_TEXTREL, 0))
|
||
return FALSE;
|
||
}
|
||
}
|
||
#undef add_dynamic_entry
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Given a .data section and a .emreloc in-memory section, store
|
||
relocation information into the .emreloc section which can be
|
||
used at runtime to relocate the section. This is called by the
|
||
linker when the --embedded-relocs switch is used. This is called
|
||
after the add_symbols entry point has been called for all the
|
||
objects, and before the final_link entry point is called. */
|
||
|
||
bfd_boolean bfd_bfin_elf32_create_embedded_relocs
|
||
PARAMS ((bfd *, struct bfd_link_info *, asection *, asection *, char **));
|
||
|
||
bfd_boolean
|
||
bfd_bfin_elf32_create_embedded_relocs (
|
||
bfd *abfd,
|
||
struct bfd_link_info *info,
|
||
asection *datasec,
|
||
asection *relsec,
|
||
char **errmsg)
|
||
{
|
||
Elf_Internal_Shdr *symtab_hdr;
|
||
Elf_Internal_Sym *isymbuf = NULL;
|
||
Elf_Internal_Rela *internal_relocs = NULL;
|
||
Elf_Internal_Rela *irel, *irelend;
|
||
bfd_byte *p;
|
||
bfd_size_type amt;
|
||
|
||
BFD_ASSERT (! info->relocatable);
|
||
|
||
*errmsg = NULL;
|
||
|
||
if (datasec->reloc_count == 0)
|
||
return TRUE;
|
||
|
||
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
|
||
|
||
/* Get a copy of the native relocations. */
|
||
internal_relocs = (_bfd_elf_link_read_relocs
|
||
(abfd, datasec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
|
||
info->keep_memory));
|
||
if (internal_relocs == NULL)
|
||
goto error_return;
|
||
|
||
amt = (bfd_size_type) datasec->reloc_count * 12;
|
||
relsec->contents = (bfd_byte *) bfd_alloc (abfd, amt);
|
||
if (relsec->contents == NULL)
|
||
goto error_return;
|
||
|
||
p = relsec->contents;
|
||
|
||
irelend = internal_relocs + datasec->reloc_count;
|
||
for (irel = internal_relocs; irel < irelend; irel++, p += 12)
|
||
{
|
||
asection *targetsec;
|
||
|
||
/* We are going to write a four byte longword into the runtime
|
||
reloc section. The longword will be the address in the data
|
||
section which must be relocated. It is followed by the name
|
||
of the target section NUL-padded or truncated to 8
|
||
characters. */
|
||
|
||
/* We can only relocate absolute longword relocs at run time. */
|
||
if (ELF32_R_TYPE (irel->r_info) != (int) R_byte4_data)
|
||
{
|
||
*errmsg = _("unsupported reloc type");
|
||
bfd_set_error (bfd_error_bad_value);
|
||
goto error_return;
|
||
}
|
||
|
||
/* Get the target section referred to by the reloc. */
|
||
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
|
||
{
|
||
/* A local symbol. */
|
||
Elf_Internal_Sym *isym;
|
||
|
||
/* Read this BFD's local symbols if we haven't done so already. */
|
||
if (isymbuf == NULL)
|
||
{
|
||
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
|
||
if (isymbuf == NULL)
|
||
isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
|
||
symtab_hdr->sh_info, 0,
|
||
NULL, NULL, NULL);
|
||
if (isymbuf == NULL)
|
||
goto error_return;
|
||
}
|
||
|
||
isym = isymbuf + ELF32_R_SYM (irel->r_info);
|
||
targetsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
|
||
}
|
||
else
|
||
{
|
||
unsigned long indx;
|
||
struct elf_link_hash_entry *h;
|
||
|
||
/* An external symbol. */
|
||
indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
|
||
h = elf_sym_hashes (abfd)[indx];
|
||
BFD_ASSERT (h != NULL);
|
||
if (h->root.type == bfd_link_hash_defined
|
||
|| h->root.type == bfd_link_hash_defweak)
|
||
targetsec = h->root.u.def.section;
|
||
else
|
||
targetsec = NULL;
|
||
}
|
||
|
||
bfd_put_32 (abfd, irel->r_offset + datasec->output_offset, p);
|
||
memset (p + 4, 0, 8);
|
||
if (targetsec != NULL)
|
||
strncpy ((char *) p + 4, targetsec->output_section->name, 8);
|
||
}
|
||
|
||
if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
|
||
free (isymbuf);
|
||
if (internal_relocs != NULL
|
||
&& elf_section_data (datasec)->relocs != internal_relocs)
|
||
free (internal_relocs);
|
||
return TRUE;
|
||
|
||
error_return:
|
||
if (isymbuf != NULL && symtab_hdr->contents != (unsigned char *) isymbuf)
|
||
free (isymbuf);
|
||
if (internal_relocs != NULL
|
||
&& elf_section_data (datasec)->relocs != internal_relocs)
|
||
free (internal_relocs);
|
||
return FALSE;
|
||
}
|
||
|
||
#define TARGET_LITTLE_SYM bfd_elf32_bfin_vec
|
||
#define TARGET_LITTLE_NAME "elf32-bfin"
|
||
#define ELF_ARCH bfd_arch_bfin
|
||
#define ELF_MACHINE_CODE EM_BLACKFIN
|
||
#define ELF_MAXPAGESIZE 0x1000
|
||
#define elf_symbol_leading_char '_'
|
||
|
||
#define bfd_elf32_bfd_reloc_type_lookup bfin_bfd_reloc_type_lookup
|
||
#define elf_info_to_howto bfin_info_to_howto
|
||
#define elf_info_to_howto_rel 0
|
||
#define elf_backend_object_p elf32_bfin_object_p
|
||
|
||
#define bfd_elf32_bfd_is_local_label_name \
|
||
bfin_is_local_label_name
|
||
#define bfin_hash_table(p) \
|
||
((struct bfin_link_hash_table *) (p)->hash)
|
||
|
||
|
||
|
||
#define elf_backend_create_dynamic_sections \
|
||
_bfd_elf_create_dynamic_sections
|
||
#define bfd_elf32_bfd_link_hash_table_create \
|
||
bfin_link_hash_table_create
|
||
#define bfd_elf32_bfd_final_link bfd_elf_gc_common_final_link
|
||
|
||
#define elf_backend_check_relocs bfin_check_relocs
|
||
#define elf_backend_adjust_dynamic_symbol \
|
||
bfin_adjust_dynamic_symbol
|
||
#define elf_backend_size_dynamic_sections \
|
||
bfin_size_dynamic_sections
|
||
#define elf_backend_relocate_section bfin_relocate_section
|
||
#define elf_backend_finish_dynamic_symbol \
|
||
bfin_finish_dynamic_symbol
|
||
#define elf_backend_finish_dynamic_sections \
|
||
bfin_finish_dynamic_sections
|
||
#define elf_backend_gc_mark_hook bfin_gc_mark_hook
|
||
#define elf_backend_gc_sweep_hook bfin_gc_sweep_hook
|
||
#define bfd_elf32_bfd_merge_private_bfd_data \
|
||
elf32_bfin_merge_private_bfd_data
|
||
#define bfd_elf32_bfd_set_private_flags \
|
||
elf32_bfin_set_private_flags
|
||
#define bfd_elf32_bfd_print_private_bfd_data \
|
||
elf32_bfin_print_private_bfd_data
|
||
#define elf_backend_reloc_type_class elf32_bfin_reloc_type_class
|
||
#define elf_backend_can_gc_sections 1
|
||
#define elf_backend_can_refcount 1
|
||
#define elf_backend_want_got_plt 0
|
||
#define elf_backend_plt_readonly 1
|
||
#define elf_backend_want_plt_sym 0
|
||
#define elf_backend_got_header_size 12
|
||
#define elf_backend_rela_normal 1
|
||
|
||
#include "elf32-target.h"
|
||
|
||
#undef TARGET_LITTLE_SYM
|
||
#define TARGET_LITTLE_SYM bfd_elf32_bfinfdpic_vec
|
||
#undef TARGET_LITTLE_NAME
|
||
#define TARGET_LITTLE_NAME "elf32-bfinfdpic"
|
||
#undef elf32_bed
|
||
#define elf32_bed elf32_bfinfdpic_bed
|
||
|
||
#undef elf_backend_gc_sweep_hook
|
||
#define elf_backend_gc_sweep_hook bfinfdpic_gc_sweep_hook
|
||
|
||
#undef elf_backend_got_header_size
|
||
#define elf_backend_got_header_size 0
|
||
|
||
#undef elf_backend_relocate_section
|
||
#define elf_backend_relocate_section bfinfdpic_relocate_section
|
||
#undef elf_backend_check_relocs
|
||
#define elf_backend_check_relocs bfinfdpic_check_relocs
|
||
|
||
#undef bfd_elf32_bfd_link_hash_table_create
|
||
#define bfd_elf32_bfd_link_hash_table_create \
|
||
bfinfdpic_elf_link_hash_table_create
|
||
#undef elf_backend_always_size_sections
|
||
#define elf_backend_always_size_sections \
|
||
elf32_bfinfdpic_always_size_sections
|
||
#undef elf_backend_modify_segment_map
|
||
#define elf_backend_modify_segment_map \
|
||
elf32_bfinfdpic_modify_segment_map
|
||
#undef bfd_elf32_bfd_copy_private_bfd_data
|
||
#define bfd_elf32_bfd_copy_private_bfd_data \
|
||
elf32_bfinfdpic_copy_private_bfd_data
|
||
|
||
#undef elf_backend_create_dynamic_sections
|
||
#define elf_backend_create_dynamic_sections \
|
||
elf32_bfinfdpic_create_dynamic_sections
|
||
#undef elf_backend_adjust_dynamic_symbol
|
||
#define elf_backend_adjust_dynamic_symbol \
|
||
elf32_bfinfdpic_adjust_dynamic_symbol
|
||
#undef elf_backend_size_dynamic_sections
|
||
#define elf_backend_size_dynamic_sections \
|
||
elf32_bfinfdpic_size_dynamic_sections
|
||
#undef elf_backend_finish_dynamic_symbol
|
||
#define elf_backend_finish_dynamic_symbol \
|
||
elf32_bfinfdpic_finish_dynamic_symbol
|
||
#undef elf_backend_finish_dynamic_sections
|
||
#define elf_backend_finish_dynamic_sections \
|
||
elf32_bfinfdpic_finish_dynamic_sections
|
||
|
||
#undef elf_backend_can_make_relative_eh_frame
|
||
#define elf_backend_can_make_relative_eh_frame \
|
||
bfinfdpic_elf_use_relative_eh_frame
|
||
#undef elf_backend_can_make_lsda_relative_eh_frame
|
||
#define elf_backend_can_make_lsda_relative_eh_frame \
|
||
bfinfdpic_elf_use_relative_eh_frame
|
||
#undef elf_backend_encode_eh_address
|
||
#define elf_backend_encode_eh_address \
|
||
bfinfdpic_elf_encode_eh_address
|
||
|
||
#undef elf_backend_may_use_rel_p
|
||
#define elf_backend_may_use_rel_p 1
|
||
#undef elf_backend_may_use_rela_p
|
||
#define elf_backend_may_use_rela_p 1
|
||
/* We use REL for dynamic relocations only. */
|
||
#undef elf_backend_default_use_rela_p
|
||
#define elf_backend_default_use_rela_p 1
|
||
|
||
#undef elf_backend_omit_section_dynsym
|
||
#define elf_backend_omit_section_dynsym _bfinfdpic_link_omit_section_dynsym
|
||
|
||
#include "elf32-target.h"
|