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julius |
/* BFD back-end for MAXQ COFF binaries.
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Copyright 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
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Contributed by Vineet Sharma (vineets@noida.hcltech.com) Inderpreet S.
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(inderpreetb@noida.hcltech.com)
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HCL Technologies Ltd.
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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 it
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under the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "libbfd.h"
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#include "coff/maxq.h"
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#include "coff/internal.h"
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#include "libcoff.h"
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#include "libiberty.h"
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#ifndef MAXQ20
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#define MAXQ20 1
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#endif
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#define RTYPE2HOWTO(cache_ptr, dst) \
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((cache_ptr)->howto = \
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((dst)->r_type < 48 \
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? howto_table + (((dst)->r_type==47) ? 6: ((dst)->r_type)) \
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: NULL))
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#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
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/* Code to swap in the reloc offset. */
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#define SWAP_IN_RELOC_OFFSET H_GET_16
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#define SWAP_OUT_RELOC_OFFSET H_PUT_16
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#define SHORT_JUMP BFD_RELOC_16_PCREL_S2
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#define LONG_JUMP BFD_RELOC_14
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#define ABSOLUTE_ADDR_FOR_DATA BFD_RELOC_24
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/* checks the range of short jump -127 to 128 */
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#define IS_SJUMP_RANGE(x) ((x > -128) && (x < 129))
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#define HIGH_WORD_MASK 0xff00
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#define LOW_WORD_MASK 0x00ff
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static long
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get_symbol_value (asymbol *symbol)
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{
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long relocation = 0;
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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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symbol->section->output_section->vma + symbol->section->output_offset;
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return relocation;
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}
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/* This function performs all the maxq relocations.
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FIXME: The handling of the addend in the 'BFD_*'
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relocations types. */
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static bfd_reloc_status_type
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coff_maxq20_reloc (bfd * abfd,
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arelent * reloc_entry,
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asymbol * symbol_in,
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void * data,
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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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unsigned char *addr = NULL;
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unsigned long x = 0;
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long call_addr = 0;
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short addend = 0;
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long diff = 0;
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/* If this is an undefined symbol, return error. */
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if (symbol_in->section == &bfd_und_section
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&& (symbol_in->flags & BSF_WEAK) == 0)
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return bfd_reloc_continue;
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if (data && reloc_entry)
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{
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addr = (unsigned char *) data + reloc_entry->address;
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call_addr = call_addr - call_addr;
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call_addr = get_symbol_value (symbol_in);
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/* Over here the value val stores the 8 bit/16 bit value. We will put a
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check if we are moving a 16 bit immediate value into an 8 bit
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register. In that case we will generate a Upper bytes into PFX[0]
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and move the lower 8 bits as SRC. */
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switch (reloc_entry->howto->type)
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{
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/* BFD_RELOC_16_PCREL_S2 47 Handles all the relative jumps and
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calls Note: Every relative jump or call is in words. */
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case SHORT_JUMP:
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/* Handle any addend. */
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addend = reloc_entry->addend;
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if (addend > call_addr || addend > 0)
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call_addr = symbol_in->section->output_section->vma + addend;
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else if (addend < call_addr && addend > 0)
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call_addr = call_addr + addend;
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else if (addend < 0)
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call_addr = call_addr + addend;
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diff = ((call_addr << 1) - (reloc_entry->address << 1));
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if (!IS_SJUMP_RANGE (diff))
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{
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bfd_perror (_("Can't Make it a Short Jump"));
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return bfd_reloc_outofrange;
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}
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x = bfd_get_16 (abfd, addr);
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x = x & LOW_WORD_MASK;
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x = x | (diff << 8);
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bfd_put_16 (abfd, (bfd_vma) x, addr);
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return bfd_reloc_ok;
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case ABSOLUTE_ADDR_FOR_DATA:
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case LONG_JUMP:
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/* BFD_RELOC_14 Handles intersegment or long jumps which might be
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from code to code or code to data segment jumps. Note: When this
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fucntion is called by gas the section flags somehow do not
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contain the info about the section type(CODE or DATA). Thus the
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user needs to evoke the linker after assembling the files
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because the Code-Code relocs are word aligned but code-data are
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byte aligned. */
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addend = (reloc_entry->addend - reloc_entry->addend);
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/* Handle any addend. */
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addend = reloc_entry->addend;
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/* For relocation involving multiple file added becomes zero thus
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this fails - check for zero added. In another case when we try
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to add a stub to a file the addend shows the offset from the
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start od this file. */
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addend = 0;
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if (!bfd_is_com_section (symbol_in->section) &&
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((symbol_in->flags & BSF_OLD_COMMON) == 0))
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{
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if (reloc_entry->addend > symbol_in->value)
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addend = reloc_entry->addend - symbol_in->value;
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if ((reloc_entry->addend < symbol_in->value)
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&& (reloc_entry->addend != 0))
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addend = reloc_entry->addend - symbol_in->value;
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if (reloc_entry->addend == symbol_in->value)
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addend = 0;
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}
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if (bfd_is_com_section (symbol_in->section) ||
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((symbol_in->flags & BSF_OLD_COMMON) != 0))
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addend = reloc_entry->addend;
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if (addend < 0
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&& (call_addr < (long) (addend * (-1))))
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addend = 0;
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call_addr += addend;
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/* FIXME: This check does not work well with the assembler,
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linker needs to be run always. */
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if ((symbol_in->section->flags & SEC_CODE) == SEC_CODE)
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{
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/* Convert it into words. */
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call_addr = call_addr >> 1;
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if (call_addr > 0xFFFF) /* Intersegment Jump. */
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{
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bfd_perror (_("Exceeds Long Jump Range"));
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return bfd_reloc_outofrange;
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}
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}
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else
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{
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/* case ABSOLUTE_ADDR_FOR_DATA : Resolves any code-data
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segemnt relocs. These are NOT word aligned. */
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if (call_addr > 0xFFFF) /* Intersegment Jump. */
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{
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bfd_perror (_("Absolute address Exceeds 16 bit Range"));
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return bfd_reloc_outofrange;
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}
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}
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x = bfd_get_32 (abfd, addr);
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x = (x & 0xFF00FF00);
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x = (x | ((call_addr & HIGH_WORD_MASK) >> 8));
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x = (x | (call_addr & LOW_WORD_MASK) << 16);
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bfd_put_32 (abfd, (bfd_vma) x, addr);
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return bfd_reloc_ok;
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case BFD_RELOC_8:
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addend = (reloc_entry->addend - reloc_entry->addend);
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if (!bfd_is_com_section (symbol_in->section) &&
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((symbol_in->flags & BSF_OLD_COMMON) == 0))
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{
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if (reloc_entry->addend > symbol_in->value)
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addend = reloc_entry->addend - symbol_in->value;
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if (reloc_entry->addend < symbol_in->value)
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addend = reloc_entry->addend - symbol_in->value;
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if (reloc_entry->addend == symbol_in->value)
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addend = 0;
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}
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if (bfd_is_com_section (symbol_in->section) ||
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((symbol_in->flags & BSF_OLD_COMMON) != 0))
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addend = reloc_entry->addend;
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if (addend < 0
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&& (call_addr < (long) (addend * (-1))))
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addend = 0;
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if (call_addr + addend > 0xFF)
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{
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bfd_perror (_("Absolute address Exceeds 8 bit Range"));
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return bfd_reloc_outofrange;
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}
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x = bfd_get_8 (abfd, addr);
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x = x & 0x00;
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x = x | (call_addr + addend);
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| 248 |
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bfd_put_8 (abfd, (bfd_vma) x, addr);
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return bfd_reloc_ok;
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| 251 |
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case BFD_RELOC_16:
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addend = (reloc_entry->addend - reloc_entry->addend);
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if (!bfd_is_com_section (symbol_in->section) &&
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((symbol_in->flags & BSF_OLD_COMMON) == 0))
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{
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| 256 |
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if (reloc_entry->addend > symbol_in->value)
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| 257 |
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addend = reloc_entry->addend - symbol_in->value;
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| 258 |
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| 259 |
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if (reloc_entry->addend < symbol_in->value)
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| 260 |
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addend = reloc_entry->addend - symbol_in->value;
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| 261 |
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| 262 |
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if (reloc_entry->addend == symbol_in->value)
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| 263 |
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addend = 0;
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| 264 |
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}
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| 265 |
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| 266 |
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if (bfd_is_com_section (symbol_in->section) ||
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| 267 |
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((symbol_in->flags & BSF_OLD_COMMON) != 0))
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| 268 |
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addend = reloc_entry->addend;
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| 269 |
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| 270 |
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if (addend < 0
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| 271 |
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&& (call_addr < (long) (addend * (-1))))
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| 272 |
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addend = 0;
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| 273 |
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| 274 |
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if ((call_addr + addend) > 0xFFFF)
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| 275 |
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{
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| 276 |
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bfd_perror (_("Absolute address Exceeds 16 bit Range"));
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| 277 |
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return bfd_reloc_outofrange;
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| 278 |
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}
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| 279 |
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else
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| 280 |
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{
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| 281 |
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unsigned short val = (call_addr + addend);
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| 282 |
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| 283 |
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x = bfd_get_16 (abfd, addr);
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| 284 |
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| 285 |
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/* LE */
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| 286 |
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x = (x & 0x0000); /* Flush garbage value. */
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| 287 |
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x = val;
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| 288 |
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if ((symbol_in->section->flags & SEC_CODE) == SEC_CODE)
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| 289 |
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x = x >> 1; /* Convert it into words. */
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| 290 |
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}
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| 291 |
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| 292 |
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bfd_put_16 (abfd, (bfd_vma) x, addr);
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| 293 |
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return bfd_reloc_ok;
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| 294 |
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| 295 |
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case BFD_RELOC_32:
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| 296 |
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addend = (reloc_entry->addend - reloc_entry->addend);
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| 297 |
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| 298 |
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if (!bfd_is_com_section (symbol_in->section) &&
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| 299 |
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((symbol_in->flags & BSF_OLD_COMMON) == 0))
|
| 300 |
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{
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| 301 |
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if (reloc_entry->addend > symbol_in->value)
|
| 302 |
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addend = reloc_entry->addend - symbol_in->value;
|
| 303 |
|
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if (reloc_entry->addend < symbol_in->value)
|
| 304 |
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addend = reloc_entry->addend - symbol_in->value;
|
| 305 |
|
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if (reloc_entry->addend == symbol_in->value)
|
| 306 |
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addend = 0;
|
| 307 |
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}
|
| 308 |
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| 309 |
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if (bfd_is_com_section (symbol_in->section) ||
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| 310 |
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((symbol_in->flags & BSF_OLD_COMMON) != 0))
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| 311 |
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addend = reloc_entry->addend;
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| 312 |
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| 313 |
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if (addend < 0
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| 314 |
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&& (call_addr < (long) (addend * (-1))))
|
| 315 |
|
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addend = 0;
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| 316 |
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| 317 |
|
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if ((call_addr + addend) < 0)
|
| 318 |
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{
|
| 319 |
|
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bfd_perror ("Absolute address Exceeds 32 bit Range");
|
| 320 |
|
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return bfd_reloc_outofrange;
|
| 321 |
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}
|
| 322 |
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|
| 323 |
|
|
x = bfd_get_32 (abfd, addr);
|
| 324 |
|
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x = (x & 0x0000); /* Flush garbage value. */
|
| 325 |
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x = call_addr + addend;
|
| 326 |
|
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if ((symbol_in->section->flags & SEC_CODE) == SEC_CODE)
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| 327 |
|
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x = x >> 1; /* Convert it into words. */
|
| 328 |
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| 329 |
|
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bfd_put_32 (abfd, (bfd_vma) x, addr);
|
| 330 |
|
|
return bfd_reloc_ok;
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| 331 |
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| 332 |
|
|
default:
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| 333 |
|
|
bfd_perror (_("Unrecognized Reloc Type"));
|
| 334 |
|
|
return bfd_reloc_notsupported;
|
| 335 |
|
|
}
|
| 336 |
|
|
}
|
| 337 |
|
|
|
| 338 |
|
|
return bfd_reloc_notsupported;
|
| 339 |
|
|
}
|
| 340 |
|
|
|
| 341 |
|
|
static reloc_howto_type howto_table[] =
|
| 342 |
|
|
{
|
| 343 |
|
|
EMPTY_HOWTO (0),
|
| 344 |
|
|
EMPTY_HOWTO (1),
|
| 345 |
|
|
{
|
| 346 |
|
|
BFD_RELOC_32, 0, 1, 8, FALSE, 0, complain_overflow_bitfield,
|
| 347 |
|
|
coff_maxq20_reloc, "32Bit", TRUE, 0x000000ff, 0x000000ff, TRUE
|
| 348 |
|
|
},
|
| 349 |
|
|
{
|
| 350 |
|
|
SHORT_JUMP, 0, 1, 8, FALSE, 0, complain_overflow_bitfield,
|
| 351 |
|
|
coff_maxq20_reloc, "SHORT_JMP", TRUE, 0x000000ff, 0x000000ff, TRUE
|
| 352 |
|
|
},
|
| 353 |
|
|
{
|
| 354 |
|
|
ABSOLUTE_ADDR_FOR_DATA, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
|
| 355 |
|
|
coff_maxq20_reloc, "INTERSEGMENT_RELOC", TRUE, 0x00000000, 0x00000000,
|
| 356 |
|
|
FALSE
|
| 357 |
|
|
},
|
| 358 |
|
|
{
|
| 359 |
|
|
BFD_RELOC_16, 0, 1, 8, FALSE, 0, complain_overflow_bitfield,
|
| 360 |
|
|
coff_maxq20_reloc, "16Bit", TRUE, 0x000000ff, 0x000000ff, TRUE
|
| 361 |
|
|
},
|
| 362 |
|
|
{
|
| 363 |
|
|
LONG_JUMP, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
|
| 364 |
|
|
coff_maxq20_reloc, "LONG_JUMP", TRUE, 0x00000000, 0x00000000, FALSE
|
| 365 |
|
|
},
|
| 366 |
|
|
{
|
| 367 |
|
|
BFD_RELOC_8, 0, 1, 8, FALSE, 0, complain_overflow_bitfield,
|
| 368 |
|
|
coff_maxq20_reloc, "8bit", TRUE, 0x000000ff, 0x000000ff, TRUE
|
| 369 |
|
|
},
|
| 370 |
|
|
EMPTY_HOWTO (8),
|
| 371 |
|
|
EMPTY_HOWTO (9),
|
| 372 |
|
|
EMPTY_HOWTO (10),
|
| 373 |
|
|
};
|
| 374 |
|
|
|
| 375 |
|
|
static reloc_howto_type *
|
| 376 |
|
|
maxq_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
|
| 377 |
|
|
bfd_reloc_code_real_type code)
|
| 378 |
|
|
{
|
| 379 |
|
|
switch (code)
|
| 380 |
|
|
{
|
| 381 |
|
|
/* SHORT JUMP */
|
| 382 |
|
|
case BFD_RELOC_16_PCREL_S2:
|
| 383 |
|
|
return howto_table + 3;
|
| 384 |
|
|
|
| 385 |
|
|
/* INTERSEGMENT JUMP */
|
| 386 |
|
|
case BFD_RELOC_24:
|
| 387 |
|
|
return howto_table + 4;
|
| 388 |
|
|
|
| 389 |
|
|
/* BYTE RELOC */
|
| 390 |
|
|
case BFD_RELOC_8:
|
| 391 |
|
|
return howto_table + 7;
|
| 392 |
|
|
|
| 393 |
|
|
/* WORD RELOC */
|
| 394 |
|
|
case BFD_RELOC_16:
|
| 395 |
|
|
return howto_table + 5;
|
| 396 |
|
|
|
| 397 |
|
|
/* LONG RELOC */
|
| 398 |
|
|
case BFD_RELOC_32:
|
| 399 |
|
|
return howto_table + 2;
|
| 400 |
|
|
|
| 401 |
|
|
/* LONG JUMP */
|
| 402 |
|
|
case BFD_RELOC_14:
|
| 403 |
|
|
return howto_table + 6;
|
| 404 |
|
|
|
| 405 |
|
|
default:
|
| 406 |
|
|
return NULL;
|
| 407 |
|
|
}
|
| 408 |
|
|
}
|
| 409 |
|
|
|
| 410 |
|
|
static reloc_howto_type *
|
| 411 |
|
|
maxq_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
|
| 412 |
|
|
{
|
| 413 |
|
|
unsigned int i;
|
| 414 |
|
|
|
| 415 |
|
|
for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
|
| 416 |
|
|
if (howto_table[i].name != NULL
|
| 417 |
|
|
&& strcasecmp (howto_table[i].name, r_name) == 0)
|
| 418 |
|
|
return &howto_table[i];
|
| 419 |
|
|
|
| 420 |
|
|
return NULL;
|
| 421 |
|
|
}
|
| 422 |
|
|
|
| 423 |
|
|
#define coff_bfd_reloc_type_lookup maxq_reloc_type_lookup
|
| 424 |
|
|
#define coff_bfd_reloc_name_lookup maxq_reloc_name_lookup
|
| 425 |
|
|
|
| 426 |
|
|
/* Perform any necessary magic to the addend in a reloc entry. */
|
| 427 |
|
|
#define CALC_ADDEND(abfd, symbol, ext_reloc, cache_ptr) \
|
| 428 |
|
|
cache_ptr->addend = ext_reloc.r_offset;
|
| 429 |
|
|
|
| 430 |
|
|
#ifndef bfd_pe_print_pdata
|
| 431 |
|
|
#define bfd_pe_print_pdata NULL
|
| 432 |
|
|
#endif
|
| 433 |
|
|
|
| 434 |
|
|
#include "coffcode.h"
|
| 435 |
|
|
|
| 436 |
|
|
#ifndef TARGET_UNDERSCORE
|
| 437 |
|
|
#define TARGET_UNDERSCORE 1
|
| 438 |
|
|
#endif
|
| 439 |
|
|
|
| 440 |
|
|
#ifndef EXTRA_S_FLAGS
|
| 441 |
|
|
#define EXTRA_S_FLAGS 0
|
| 442 |
|
|
#endif
|
| 443 |
|
|
|
| 444 |
|
|
/* Forward declaration for use initialising alternative_target field. */
|
| 445 |
|
|
CREATE_LITTLE_COFF_TARGET_VEC (maxqcoff_vec, "coff-maxq", 0, EXTRA_S_FLAGS,
|
| 446 |
|
|
TARGET_UNDERSCORE, NULL, COFF_SWAP_TABLE);
|
| 447 |
|
|
|
