536 lines
16 KiB
C
536 lines
16 KiB
C
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/* D30V-specific support for 32-bit ELF
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Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
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Free Software Foundation, Inc.
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Contributed by Martin Hunt (hunt@cygnus.com).
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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,
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MA 02110-1301, 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/d30v.h"
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#define MAX32 ((bfd_signed_vma) 0x7fffffff)
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#define MIN32 (- MAX32 - 1)
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static bfd_reloc_status_type
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bfd_elf_d30v_reloc (bfd *abfd,
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arelent *reloc_entry,
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asymbol *symbol,
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void * data,
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asection *input_section,
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bfd *output_bfd,
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char **error_message)
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{
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bfd_signed_vma relocation;
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bfd_vma in1, in2, num;
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bfd_vma tmp_addr = 0;
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bfd_reloc_status_type r;
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asection *reloc_target_output_section;
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bfd_size_type addr = reloc_entry->address;
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bfd_reloc_status_type flag = bfd_reloc_ok;
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bfd_vma output_base = 0;
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reloc_howto_type *howto = reloc_entry->howto;
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int make_absolute = 0;
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if (output_bfd != NULL)
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{
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/* Partial linking -- do nothing. */
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reloc_entry->address += input_section->output_offset;
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return bfd_reloc_ok;
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}
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r = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
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input_section, output_bfd, error_message);
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if (r != bfd_reloc_continue)
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return r;
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/* A hacked-up version of bfd_perform_reloc() follows. */
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if (bfd_is_und_section (symbol->section)
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&& (symbol->flags & BSF_WEAK) == 0
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&& output_bfd == NULL)
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flag = bfd_reloc_undefined;
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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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/* Work out which section the relocation is targeted at and the
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initial relocation command value. */
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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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reloc_target_output_section = symbol->section->output_section;
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/* Convert input-section-relative symbol value to absolute. */
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output_base = reloc_target_output_section->vma;
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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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/* 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)
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{
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tmp_addr = input_section->output_section->vma
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+ input_section->output_offset
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+ reloc_entry->address;
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relocation -= tmp_addr;
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}
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in1 = bfd_get_32 (abfd, (bfd_byte *) data + addr);
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in2 = bfd_get_32 (abfd, (bfd_byte *) data + addr + 4);
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/* Extract the addend. */
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num = ((in2 & 0x3FFFF)
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| ((in2 & 0xFF00000) >> 2)
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| ((in1 & 0x3F) << 26));
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in1 &= 0xFFFFFFC0;
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in2 = 0x80000000;
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relocation += num;
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if (howto->pc_relative && howto->bitsize == 32)
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{
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/* The D30V has a PC that doesn't wrap and PC-relative jumps are
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signed, so a PC-relative jump can't be more than +/- 2^31 bytes.
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If one exceeds this, change it to an absolute jump. */
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if (relocation > MAX32 || relocation < MIN32)
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{
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relocation = (relocation + tmp_addr) & 0xffffffff;
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make_absolute = 1;
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}
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}
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in1 |= (relocation >> 26) & 0x3F; /* Top 6 bits. */
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in2 |= ((relocation & 0x03FC0000) << 2); /* Next 8 bits. */
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in2 |= relocation & 0x0003FFFF; /* Bottom 18 bits. */
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/* Change a PC-relative instruction to its
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absolute equivalent with this simple hack. */
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if (make_absolute)
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in1 |= 0x00100000;
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bfd_put_32 (abfd, in1, (bfd_byte *) data + addr);
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bfd_put_32 (abfd, in2, (bfd_byte *) data + addr + 4);
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return flag;
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}
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static bfd_reloc_status_type
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bfd_elf_d30v_reloc_21 (bfd *abfd,
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arelent *reloc_entry,
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asymbol *symbol,
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void * data,
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asection *input_section,
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bfd *output_bfd,
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char **error_message)
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{
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bfd_vma relocation;
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bfd_vma in1, num;
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bfd_reloc_status_type r;
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asection *reloc_target_output_section;
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bfd_size_type addr = reloc_entry->address;
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bfd_reloc_status_type flag = bfd_reloc_ok;
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bfd_vma output_base = 0;
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reloc_howto_type *howto = reloc_entry->howto;
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int mask, max;
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if (output_bfd != NULL)
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{
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/* Partial linking -- do nothing. */
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reloc_entry->address += input_section->output_offset;
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return bfd_reloc_ok;
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}
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r = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
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input_section, output_bfd, error_message);
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if (r != bfd_reloc_continue)
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return r;
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/* A hacked-up version of bfd_perform_reloc() follows. */
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if (bfd_is_und_section (symbol->section)
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&& (symbol->flags & BSF_WEAK) == 0
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&& output_bfd == NULL)
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flag = bfd_reloc_undefined;
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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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/* Work out which section the relocation is targeted at and the
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initial relocation command value. */
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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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reloc_target_output_section = symbol->section->output_section;
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/* Convert input-section-relative symbol value to absolute. */
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output_base = reloc_target_output_section->vma;
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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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/* 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)
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{
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relocation -= (input_section->output_section->vma
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+ input_section->output_offset);
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if (howto->pcrel_offset)
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relocation -= reloc_entry->address;
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}
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in1 = bfd_get_32 (abfd, (bfd_byte *) data + addr);
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mask = (1 << howto->bitsize) - 1;
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if (howto->bitsize == 6)
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mask <<= 12;
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max = (1 << (howto->bitsize + 2)) - 1;
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/* Extract the addend. */
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num = in1 & mask; /* 18 bits. */
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if (howto->bitsize == 6)
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num >>= 12;
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num <<= 3; /* shift left 3. */
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in1 &= ~mask; /* Mask out addend. */
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relocation += num;
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if (howto->type == R_D30V_21_PCREL_R
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|| howto->type == R_D30V_15_PCREL_R
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|| howto->type == R_D30V_9_PCREL_R)
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relocation += 4;
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if ((int) relocation < 0)
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{
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if (~ (int) relocation > max)
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flag = bfd_reloc_overflow;
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}
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else
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{
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if ((int) relocation > max)
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flag = bfd_reloc_overflow;
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}
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relocation >>= 3;
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if (howto->bitsize == 6)
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in1 |= ((relocation & (mask >> 12)) << 12);
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else
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in1 |= relocation & mask;
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bfd_put_32 (abfd, in1, (bfd_byte *) data + addr);
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return flag;
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}
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static reloc_howto_type elf_d30v_howto_table[] =
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{
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/* This reloc does nothing. */
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HOWTO (R_D30V_NONE, /* Type. */
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0, /* Rightshift. */
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2, /* Size (0 = byte, 1 = short, 2 = long). */
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32, /* Bitsize. */
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FALSE, /* PC_relative. */
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0, /* Bitpos. */
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complain_overflow_bitfield, /* Complain_on_overflow. */
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bfd_elf_generic_reloc, /* Special_function. */
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"R_D30V_NONE", /* Name. */
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FALSE, /* Partial_inplace. */
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0, /* Src_mask. */
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0, /* Dst_mask. */
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FALSE), /* PCrel_offset. */
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/* A 6 bit absolute relocation. */
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HOWTO (R_D30V_6, /* Type. */
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0, /* Rightshift. */
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2, /* Size (0 = byte, 1 = short, 2 = long). */
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6, /* Bitsize. */
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FALSE, /* PC_relative. */
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0, /* Bitpos. */
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complain_overflow_bitfield, /* Complain_on_overflow. */
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bfd_elf_generic_reloc, /* Special_function. */
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"R_D30V_6", /* Name. */
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FALSE, /* Partial_inplace. */
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0x3f, /* Src_mask. */
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0x3f, /* Dst_mask. */
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FALSE), /* PCrel_offset. */
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/* A relative 9 bit relocation, right shifted by 3. */
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HOWTO (R_D30V_9_PCREL, /* Type. */
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3, /* Rightshift. */
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2, /* Size (0 = byte, 1 = short, 2 = long). */
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6, /* Bitsize. */
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TRUE, /* PC_relative. */
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0, /* Bitpos. */
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complain_overflow_signed, /* Complain_on_overflow. */
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bfd_elf_d30v_reloc_21, /* Special_function. */
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"R_D30V_9_PCREL", /* Name. */
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FALSE, /* Partial_inplace. */
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0x3f, /* Src_mask. */
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0x3f, /* Dst_mask. */
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TRUE), /* PCrel_offset. */
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/* A relative 9 bit relocation, right shifted by 3. */
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HOWTO (R_D30V_9_PCREL_R, /* Type. */
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3, /* Rightshift. */
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2, /* Size (0 = byte, 1 = short, 2 = long). */
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6, /* Bitsize. */
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TRUE, /* PC_relative. */
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0, /* Bitpos. */
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complain_overflow_signed, /* Complain_on_overflow. */
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bfd_elf_d30v_reloc_21, /* Special_function. */
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"R_D30V_9_PCREL_R", /* Name. */
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FALSE, /* Partial_inplace. */
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0x3f, /* Src_mask. */
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0x3f, /* Dst_mask. */
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TRUE), /* PCrel_offset. */
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/* An absolute 15 bit relocation, right shifted by 3. */
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HOWTO (R_D30V_15, /* Type. */
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3, /* Rightshift. */
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2, /* Size (0 = byte, 1 = short, 2 = long). */
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12, /* Bitsize. */
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FALSE, /* PC_relative. */
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0, /* Bitpos. */
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complain_overflow_signed, /* Complain_on_overflow. */
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bfd_elf_generic_reloc, /* Special_function. */
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"R_D30V_15", /* Name. */
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FALSE, /* Partial_inplace. */
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0xfff, /* Src_mask. */
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0xfff, /* Dst_mask. */
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FALSE), /* PCrel_offset. */
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/* A relative 15 bit relocation, right shifted by 3. */
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HOWTO (R_D30V_15_PCREL, /* Type. */
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3, /* Rightshift. */
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2, /* Size (0 = byte, 1 = short, 2 = long). */
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12, /* Bitsize. */
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TRUE, /* PC_relative. */
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0, /* Bitpos. */
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complain_overflow_signed, /* Complain_on_overflow. */
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bfd_elf_d30v_reloc_21, /* Special_function. */
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"R_D30V_15_PCREL", /* Name. */
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FALSE, /* Partial_inplace. */
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0xfff, /* Src_mask. */
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0xfff, /* Dst_mask. */
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TRUE), /* PCrel_offset. */
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/* A relative 15 bit relocation, right shifted by 3. */
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HOWTO (R_D30V_15_PCREL_R, /* Type. */
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3, /* Rightshift. */
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2, /* Size (0 = byte, 1 = short, 2 = long). */
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12, /* Bitsize. */
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TRUE, /* PC_relative. */
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0, /* Bitpos. */
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complain_overflow_signed, /* Complain_on_overflow. */
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bfd_elf_d30v_reloc_21, /* Special_function. */
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"R_D30V_15_PCREL_R", /* Name. */
|
||
|
|
FALSE, /* Partial_inplace. */
|
||
|
|
0xfff, /* Src_mask. */
|
||
|
|
0xfff, /* Dst_mask. */
|
||
|
|
TRUE), /* PCrel_offset. */
|
||
|
|
|
||
|
|
/* An absolute 21 bit relocation, right shifted by 3. */
|
||
|
|
HOWTO (R_D30V_21, /* Type. */
|
||
|
|
3, /* Rightshift. */
|
||
|
|
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
|
|
18, /* Bitsize. */
|
||
|
|
FALSE, /* PC_relative. */
|
||
|
|
0, /* Bitpos. */
|
||
|
|
complain_overflow_signed, /* Complain_on_overflow. */
|
||
|
|
bfd_elf_generic_reloc, /* Special_function. */
|
||
|
|
"R_D30V_21", /* Name. */
|
||
|
|
FALSE, /* Partial_inplace. */
|
||
|
|
0x3ffff, /* Src_mask. */
|
||
|
|
0x3ffff, /* Dst_mask. */
|
||
|
|
FALSE), /* PCrel_offset. */
|
||
|
|
|
||
|
|
/* A relative 21 bit relocation, right shifted by 3. */
|
||
|
|
HOWTO (R_D30V_21_PCREL, /* Type. */
|
||
|
|
3, /* Rightshift. */
|
||
|
|
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
|
|
18, /* Bitsize. */
|
||
|
|
TRUE, /* PC_relative. */
|
||
|
|
0, /* Bitpos. */
|
||
|
|
complain_overflow_signed, /* Complain_on_overflow. */
|
||
|
|
bfd_elf_d30v_reloc_21, /* Special_function. */
|
||
|
|
"R_D30V_21_PCREL", /* Name. */
|
||
|
|
FALSE, /* Partial_inplace. */
|
||
|
|
0x3ffff, /* Src_mask. */
|
||
|
|
0x3ffff, /* Dst_mask. */
|
||
|
|
TRUE), /* PCrel_offset. */
|
||
|
|
|
||
|
|
/* A relative 21 bit relocation, right shifted by 3, in the Right container. */
|
||
|
|
HOWTO (R_D30V_21_PCREL_R, /* Type. */
|
||
|
|
3, /* Rightshift. */
|
||
|
|
2, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
|
|
18, /* Bitsize. */
|
||
|
|
TRUE, /* PC_relative. */
|
||
|
|
0, /* Bitpos. */
|
||
|
|
complain_overflow_signed, /* Complain_on_overflow. */
|
||
|
|
bfd_elf_d30v_reloc_21, /* Special_function. */
|
||
|
|
"R_D30V_21_PCREL_R", /* Name. */
|
||
|
|
FALSE, /* Partial_inplace. */
|
||
|
|
0x3ffff, /* Src_mask. */
|
||
|
|
0x3ffff, /* Dst_mask. */
|
||
|
|
TRUE), /* PCrel_offset. */
|
||
|
|
|
||
|
|
/* A D30V 32 bit absolute relocation. */
|
||
|
|
HOWTO (R_D30V_32, /* Type. */
|
||
|
|
0, /* Rightshift. */
|
||
|
|
4, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
|
|
32, /* Bitsize. */
|
||
|
|
FALSE, /* PC_relative. */
|
||
|
|
0, /* Bitpos. */
|
||
|
|
complain_overflow_bitfield, /* Complain_on_overflow. */
|
||
|
|
bfd_elf_d30v_reloc, /* Special_function. */
|
||
|
|
"R_D30V_32", /* Name. */
|
||
|
|
FALSE, /* Partial_inplace. */
|
||
|
|
0xffffffff, /* Src_mask. */
|
||
|
|
0xffffffff, /* Dst_mask. */
|
||
|
|
FALSE), /* PCrel_offset. */
|
||
|
|
|
||
|
|
/* A relative 32 bit relocation. */
|
||
|
|
HOWTO (R_D30V_32_PCREL, /* Type. */
|
||
|
|
0, /* Rightshift. */
|
||
|
|
4, /* Size (0 = byte, 1 = short, 2 = long). */
|
||
|
|
32, /* Bitsize. */
|
||
|
|
TRUE, /* PC_relative. */
|
||
|
|
0, /* Bitpos. */
|
||
|
|
complain_overflow_signed, /* Complain_on_overflow. */
|
||
|
|
bfd_elf_d30v_reloc, /* Special_function. */
|
||
|
|
"R_D30V_32_PCREL", /* Name. */
|
||
|
|
FALSE, /* Partial_inplace. */
|
||
|
|
0xffffffff, /* Src_mask. */
|
||
|
|
0xffffffff, /* Dst_mask. */
|
||
|
|
TRUE), /* PCrel_offset. */
|
||
|
|
|
||
|
|
/* A regular 32 bit absolute relocation. */
|
||
|
|
HOWTO (R_D30V_32_NORMAL, /* 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_D30V_32_NORMAL", /* Name. */
|
||
|
|
FALSE, /* Partial_inplace. */
|
||
|
|
0xffffffff, /* Src_mask. */
|
||
|
|
0xffffffff, /* Dst_mask. */
|
||
|
|
FALSE), /* PCrel_offset. */
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
/* Map BFD reloc types to D30V ELF reloc types. */
|
||
|
|
|
||
|
|
struct d30v_reloc_map
|
||
|
|
{
|
||
|
|
bfd_reloc_code_real_type bfd_reloc_val;
|
||
|
|
unsigned char elf_reloc_val;
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct d30v_reloc_map d30v_reloc_map[] =
|
||
|
|
{
|
||
|
|
{ BFD_RELOC_NONE, R_D30V_NONE, },
|
||
|
|
{ BFD_RELOC_D30V_6, R_D30V_6 },
|
||
|
|
{ BFD_RELOC_D30V_9_PCREL, R_D30V_9_PCREL },
|
||
|
|
{ BFD_RELOC_D30V_9_PCREL_R, R_D30V_9_PCREL_R },
|
||
|
|
{ BFD_RELOC_D30V_15, R_D30V_15 },
|
||
|
|
{ BFD_RELOC_D30V_15_PCREL, R_D30V_15_PCREL },
|
||
|
|
{ BFD_RELOC_D30V_15_PCREL_R, R_D30V_15_PCREL_R },
|
||
|
|
{ BFD_RELOC_D30V_21, R_D30V_21 },
|
||
|
|
{ BFD_RELOC_D30V_21_PCREL, R_D30V_21_PCREL },
|
||
|
|
{ BFD_RELOC_D30V_21_PCREL_R, R_D30V_21_PCREL_R },
|
||
|
|
{ BFD_RELOC_D30V_32, R_D30V_32 },
|
||
|
|
{ BFD_RELOC_D30V_32_PCREL, R_D30V_32_PCREL },
|
||
|
|
{ BFD_RELOC_32, R_D30V_32_NORMAL },
|
||
|
|
};
|
||
|
|
|
||
|
|
static reloc_howto_type *
|
||
|
|
bfd_elf32_bfd_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
|
||
|
|
bfd_reloc_code_real_type code)
|
||
|
|
{
|
||
|
|
unsigned int i;
|
||
|
|
|
||
|
|
for (i = 0;
|
||
|
|
i < sizeof (d30v_reloc_map) / sizeof (struct d30v_reloc_map);
|
||
|
|
i++)
|
||
|
|
{
|
||
|
|
if (d30v_reloc_map[i].bfd_reloc_val == code)
|
||
|
|
return &elf_d30v_howto_table[d30v_reloc_map[i].elf_reloc_val];
|
||
|
|
}
|
||
|
|
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Set the howto pointer for an D30V ELF reloc (type REL). */
|
||
|
|
|
||
|
|
static void
|
||
|
|
d30v_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
|
||
|
|
arelent *cache_ptr,
|
||
|
|
Elf_Internal_Rela *dst)
|
||
|
|
{
|
||
|
|
unsigned int r_type;
|
||
|
|
|
||
|
|
r_type = ELF32_R_TYPE (dst->r_info);
|
||
|
|
BFD_ASSERT (r_type < (unsigned int) R_D30V_max);
|
||
|
|
cache_ptr->howto = &elf_d30v_howto_table[r_type];
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Set the howto pointer for an D30V ELF reloc (type RELA). */
|
||
|
|
|
||
|
|
static void
|
||
|
|
d30v_info_to_howto_rela (bfd *abfd ATTRIBUTE_UNUSED,
|
||
|
|
arelent *cache_ptr,
|
||
|
|
Elf_Internal_Rela *dst)
|
||
|
|
{
|
||
|
|
unsigned int r_type;
|
||
|
|
|
||
|
|
r_type = ELF32_R_TYPE (dst->r_info);
|
||
|
|
BFD_ASSERT (r_type < (unsigned int) R_D30V_max);
|
||
|
|
cache_ptr->howto = &elf_d30v_howto_table[r_type];
|
||
|
|
}
|
||
|
|
|
||
|
|
#define ELF_ARCH bfd_arch_d30v
|
||
|
|
#define ELF_MACHINE_CODE EM_D30V
|
||
|
|
#define ELF_MACHINE_ALT1 EM_CYGNUS_D30V
|
||
|
|
#define ELF_MAXPAGESIZE 0x1000
|
||
|
|
|
||
|
|
#define TARGET_BIG_SYM bfd_elf32_d30v_vec
|
||
|
|
#define TARGET_BIG_NAME "elf32-d30v"
|
||
|
|
|
||
|
|
#define elf_info_to_howto d30v_info_to_howto_rela
|
||
|
|
#define elf_info_to_howto_rel d30v_info_to_howto_rel
|
||
|
|
#define elf_backend_object_p 0
|
||
|
|
#define elf_backend_final_write_processing 0
|
||
|
|
|
||
|
|
#include "elf32-target.h"
|