355 lines
10 KiB
C
355 lines
10 KiB
C
/* BFD back-end for Hitachi Super-H COFF binaries.
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Copyright 1993, 1994 Free Software Foundation, Inc.
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Contributed by Cygnus Support.
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Written by Steve Chamberlain, <sac@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., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include "obstack.h"
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#include "libbfd.h"
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#include "bfdlink.h"
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#include "coff/sh.h"
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#include "coff/internal.h"
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#include "libcoff.h"
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static bfd_reloc_status_type sh_reloc();
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#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
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/*#define COFF_LONG_FILENAMES*/
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static reloc_howto_type r_imm32 =
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{R_SH_IMM32, 0, 2, 32, false, 0,
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complain_overflow_bitfield, sh_reloc,"r_imm32", true, 0xffffffff,0xffffffff, false};
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#define BADMAG(x) SHBADMAG(x)
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#define SH 1 /* Customize coffcode.h */
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#define __A_MAGIC_SET__
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/* Code to swap in the reloc */
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#define SWAP_OUT_RELOC_EXTRA(abfd, src, dst) \
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dst->r_stuff[0] = 'S'; \
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dst->r_stuff[1] = 'C';
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/* Code to turn a r_type into a howto ptr, uses the above howto table. */
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static long
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get_symbol_value (symbol)
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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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{
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relocation = 0;
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}
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else
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{
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relocation = symbol->value +
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symbol->section->output_section->vma +
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symbol->section->output_offset;
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}
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return(relocation);
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}
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#define RTYPE2HOWTO(x,y) ((x)->howto = &r_imm32)
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/* Compute the addend of a reloc. If the reloc is to a common symbol,
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the object file contains the value of the common symbol. By the
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time this is called, the linker may be using a different symbol
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from a different object file with a different value. Therefore, we
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hack wildly to locate the original symbol from this file so that we
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can make the correct adjustment. This macro sets coffsym to the
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symbol from the original file, and uses it to set the addend value
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correctly. If this is not a common symbol, the usual addend
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calculation is done, except that an additional tweak is needed for
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PC relative relocs.
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FIXME: This macro refers to symbols and asect; these are from the
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calling function, not the macro arguments. */
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#define CALC_ADDEND(abfd, ptr, reloc, cache_ptr) \
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{ \
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coff_symbol_type *coffsym = (coff_symbol_type *) NULL; \
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if (ptr && bfd_asymbol_bfd (ptr) != abfd) \
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coffsym = (obj_symbols (abfd) \
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+ (cache_ptr->sym_ptr_ptr - symbols)); \
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else if (ptr) \
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coffsym = coff_symbol_from (abfd, ptr); \
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if (coffsym != (coff_symbol_type *) NULL \
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&& coffsym->native->u.syment.n_scnum == 0) \
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cache_ptr->addend = - coffsym->native->u.syment.n_value; \
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else if (ptr && bfd_asymbol_bfd (ptr) == abfd \
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&& ptr->section != (asection *) NULL) \
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cache_ptr->addend = - (ptr->section->vma + ptr->value); \
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else \
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cache_ptr->addend = 0; \
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}
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/* this function is in charge of performing all the 29k relocations */
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static bfd_reloc_status_type
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sh_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd,
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error_message)
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bfd *abfd;
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arelent *reloc_entry;
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asymbol *symbol_in;
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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;
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{
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/* the consth relocation comes in two parts, we have to remember
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the state between calls, in these variables */
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unsigned long insn;
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unsigned long sym_value;
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unsigned short r_type;
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unsigned long addr = reloc_entry->address ; /*+ input_section->vma*/
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bfd_byte *hit_data =addr + (bfd_byte *)(data);
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r_type = reloc_entry->howto->type;
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if (output_bfd) {
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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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if (symbol_in != NULL
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&& bfd_is_und_section (symbol_in->section))
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{
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/* Keep the state machine happy in case we're called again */
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return (bfd_reloc_undefined);
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}
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sym_value = get_symbol_value(symbol_in);
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switch (r_type)
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{
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case R_SH_IMM32:
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insn = sym_value + reloc_entry->addend;
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insn += bfd_get_32 (abfd, hit_data);
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bfd_put_32(abfd, insn, hit_data);
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break;
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default:
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*error_message = "Unrecognized reloc";
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return (bfd_reloc_dangerous);
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}
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return(bfd_reloc_ok);
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}
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/* The reloc processing routine for the optimized COFF linker. */
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static boolean
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coff_sh_relocate_section (output_bfd, info, input_bfd, input_section,
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contents, relocs, syms, sections)
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bfd *output_bfd;
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struct bfd_link_info *info;
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bfd *input_bfd;
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asection *input_section;
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bfd_byte *contents;
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struct internal_reloc *relocs;
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struct internal_syment *syms;
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asection **sections;
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{
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struct internal_reloc *rel;
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struct internal_reloc *relend;
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/* If we are performing a relocateable link, we don't need to do a
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thing. The caller will take care of adjusting the reloc
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addresses and symbol indices. */
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if (info->relocateable)
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return true;
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rel = relocs;
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relend = rel + input_section->reloc_count;
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for (; rel < relend; rel++)
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{
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long symndx;
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bfd_byte *loc;
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struct coff_link_hash_entry *h;
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struct internal_syment *sym;
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asection *sec;
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bfd_vma val;
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symndx = rel->r_symndx;
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loc = contents + rel->r_vaddr - input_section->vma;
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if (symndx == -1)
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h = NULL;
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else
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h = obj_coff_sym_hashes (input_bfd)[symndx];
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sym = NULL;
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sec = NULL;
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val = 0;
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if (h == NULL)
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{
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if (symndx == -1)
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sec = bfd_abs_section_ptr;
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else
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{
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sym = syms + symndx;
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sec = sections[symndx];
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val = (sec->output_section->vma
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+ sec->output_offset
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+ sym->n_value
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- sec->vma);
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}
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}
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else
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{
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if (h->root.type == bfd_link_hash_defined)
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{
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sec = h->root.u.def.section;
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val = (h->root.u.def.value
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+ sec->output_section->vma
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+ sec->output_offset);
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}
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else
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{
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if (! ((*info->callbacks->undefined_symbol)
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(info, h->root.root.string, input_bfd, input_section,
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rel->r_vaddr - input_section->vma)))
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return false;
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}
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}
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switch (rel->r_type)
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{
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default:
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bfd_set_error (bfd_error_bad_value);
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return false;
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case R_SH_IMM32:
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{
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long x = bfd_get_32 (input_bfd, loc);
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x += val;
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bfd_put_32 (input_bfd, x, loc);
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}
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break;
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}
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}
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return true;
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}
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#define coff_relocate_section coff_sh_relocate_section
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#include "coffcode.h"
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const bfd_target shcoff_vec =
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{
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"coff-sh", /* name */
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bfd_target_coff_flavour,
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true, /* data byte order is big */
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true, /* header byte order is big */
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(HAS_RELOC | EXEC_P | /* object flags */
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HAS_LINENO | HAS_DEBUG |
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HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ),
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(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
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'_', /* leading symbol underscore */
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'/', /* ar_pad_char */
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15, /* ar_max_namelen */
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2, /* minimum section alignment */
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bfd_getb64, bfd_getb_signed_64, bfd_putb64,
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bfd_getb32, bfd_getb_signed_32, bfd_putb32,
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bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* data */
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bfd_getb64, bfd_getb_signed_64, bfd_putb64,
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bfd_getb32, bfd_getb_signed_32, bfd_putb32,
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bfd_getb16, bfd_getb_signed_16, bfd_putb16, /* hdrs */
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{_bfd_dummy_target, coff_object_p, /* bfd_check_format */
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bfd_generic_archive_p, _bfd_dummy_target},
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{bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
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bfd_false},
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{bfd_false, coff_write_object_contents, /* bfd_write_contents */
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_bfd_write_archive_contents, bfd_false},
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BFD_JUMP_TABLE_GENERIC (coff),
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BFD_JUMP_TABLE_COPY (coff),
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BFD_JUMP_TABLE_CORE (_bfd_nocore),
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BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
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BFD_JUMP_TABLE_SYMBOLS (coff),
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BFD_JUMP_TABLE_RELOCS (coff),
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BFD_JUMP_TABLE_WRITE (coff),
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BFD_JUMP_TABLE_LINK (coff),
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BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
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COFF_SWAP_TABLE,
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};
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const bfd_target shlcoff_vec =
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{
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"coff-shl", /* name */
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bfd_target_coff_flavour,
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false, /* data byte order is little */
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false, /* header byte order is little endian too*/
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(HAS_RELOC | EXEC_P | /* object flags */
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HAS_LINENO | HAS_DEBUG |
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HAS_SYMS | HAS_LOCALS | WP_TEXT | BFD_IS_RELAXABLE ),
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(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
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'_', /* leading symbol underscore */
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'/', /* ar_pad_char */
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15, /* ar_max_namelen */
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2, /* minimum section alignment */
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bfd_getl64, bfd_getl_signed_64, bfd_putl64,
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bfd_getl32, bfd_getl_signed_32, bfd_putl32,
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bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
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bfd_getl64, bfd_getl_signed_64, bfd_putl64,
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bfd_getl32, bfd_getl_signed_32, bfd_putl32,
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bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
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/* Note that we use a special archive recognizer.
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This is so that we only use one archive format for both
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object file types */
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{_bfd_dummy_target, coff_object_p, /* bfd_check_format */
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_bfd_dummy_target, _bfd_dummy_target},
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{bfd_false, coff_mkobject, _bfd_generic_mkarchive, /* bfd_set_format */
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bfd_false},
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{bfd_false, coff_write_object_contents, /* bfd_write_contents */
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_bfd_write_archive_contents, bfd_false},
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BFD_JUMP_TABLE_GENERIC (coff),
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BFD_JUMP_TABLE_COPY (coff),
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BFD_JUMP_TABLE_CORE (_bfd_nocore),
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BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
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BFD_JUMP_TABLE_SYMBOLS (coff),
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BFD_JUMP_TABLE_RELOCS (coff),
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BFD_JUMP_TABLE_WRITE (coff),
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BFD_JUMP_TABLE_LINK (coff),
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BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
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COFF_SWAP_TABLE,
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};
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