963 lines
28 KiB
C
963 lines
28 KiB
C
/* MeP-specific support for 32-bit ELF.
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Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
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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 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "libbfd.h"
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#include "elf-bfd.h"
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#include "elf/mep.h"
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#include "libiberty.h"
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/* Forward declarations. */
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/* Private relocation functions. */
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#define MEPREL(type, size, bits, right, left, pcrel, overflow, mask) \
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{(unsigned)type, right, size, bits, pcrel, left, overflow, mep_reloc, #type, FALSE, 0, mask, 0 }
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#define N complain_overflow_dont
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#define S complain_overflow_signed
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#define U complain_overflow_unsigned
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static bfd_reloc_status_type mep_reloc (bfd *, arelent *, struct bfd_symbol *,
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void *, asection *, bfd *, char **);
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static reloc_howto_type mep_elf_howto_table [] =
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{
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/* type, size, bits, leftshift, rightshift, pcrel, OD/OS/OU, mask. */
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MEPREL (R_MEP_NONE, 0, 0, 0, 0, 0, N, 0),
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MEPREL (R_RELC, 0, 0, 0, 0, 0, N, 0),
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/* MEPRELOC:HOWTO */
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/* This section generated from bfd/mep-relocs.pl from include/elf/mep.h. */
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MEPREL (R_MEP_8, 0, 8, 0, 0, 0, U, 0xff),
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MEPREL (R_MEP_16, 1, 16, 0, 0, 0, U, 0xffff),
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MEPREL (R_MEP_32, 2, 32, 0, 0, 0, U, 0xffffffff),
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MEPREL (R_MEP_PCREL8A2, 1, 8, 1, 1, 1, S, 0x00fe),
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MEPREL (R_MEP_PCREL12A2,1, 12, 1, 1, 1, S, 0x0ffe),
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MEPREL (R_MEP_PCREL17A2,2, 17, 0, 1, 1, S, 0x0000ffff),
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MEPREL (R_MEP_PCREL24A2,2, 24, 0, 1, 1, S, 0x07f0ffff),
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MEPREL (R_MEP_PCABS24A2,2, 24, 0, 1, 0, U, 0x07f0ffff),
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MEPREL (R_MEP_LOW16, 2, 16, 0, 0, 0, N, 0x0000ffff),
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MEPREL (R_MEP_HI16U, 2, 32, 0,16, 0, N, 0x0000ffff),
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MEPREL (R_MEP_HI16S, 2, 32, 0,16, 0, N, 0x0000ffff),
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MEPREL (R_MEP_GPREL, 2, 16, 0, 0, 0, S, 0x0000ffff),
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MEPREL (R_MEP_TPREL, 2, 16, 0, 0, 0, S, 0x0000ffff),
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MEPREL (R_MEP_TPREL7, 1, 7, 0, 0, 0, U, 0x007f),
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MEPREL (R_MEP_TPREL7A2, 1, 7, 1, 1, 0, U, 0x007e),
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MEPREL (R_MEP_TPREL7A4, 1, 7, 2, 2, 0, U, 0x007c),
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MEPREL (R_MEP_UIMM24, 2, 24, 0, 0, 0, U, 0x00ffffff),
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MEPREL (R_MEP_ADDR24A4, 2, 24, 0, 2, 0, U, 0x00fcffff),
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MEPREL (R_MEP_GNU_VTINHERIT,1, 0,16,32, 0, N, 0x0000),
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MEPREL (R_MEP_GNU_VTENTRY,1, 0,16,32, 0, N, 0x0000),
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/* MEPRELOC:END */
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};
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#define VALID_MEP_RELOC(N) ((N) >= 0 \
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&& (N) < ARRAY_SIZE (mep_elf_howto_table)
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#undef N
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#undef S
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#undef U
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static bfd_reloc_status_type
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mep_reloc
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(bfd * abfd ATTRIBUTE_UNUSED,
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arelent * reloc_entry ATTRIBUTE_UNUSED,
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struct bfd_symbol * symbol ATTRIBUTE_UNUSED,
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void * 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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return bfd_reloc_ok;
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}
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#define BFD_RELOC_MEP_NONE BFD_RELOC_NONE
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#if defined (__STDC__) || defined (ALMOST_STDC) || defined (HAVE_STRINGIZE)
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#define MAP(n) case BFD_RELOC_MEP_##n: type = R_MEP_##n; break
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#else
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#define MAP(n) case BFD_RELOC_MEP_/**/n: type = R_MEP_/**/n; break
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#endif
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static reloc_howto_type *
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mep_reloc_type_lookup
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(bfd * abfd ATTRIBUTE_UNUSED,
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bfd_reloc_code_real_type code)
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{
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unsigned int type = 0;
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switch (code)
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{
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MAP(NONE);
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case BFD_RELOC_8:
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type = R_MEP_8;
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break;
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case BFD_RELOC_16:
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type = R_MEP_16;
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break;
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case BFD_RELOC_32:
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type = R_MEP_32;
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break;
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case BFD_RELOC_VTABLE_ENTRY:
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type = R_MEP_GNU_VTENTRY;
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break;
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case BFD_RELOC_VTABLE_INHERIT:
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type = R_MEP_GNU_VTINHERIT;
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break;
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case BFD_RELOC_RELC:
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type = R_RELC;
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break;
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/* MEPRELOC:MAP */
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/* This section generated from bfd/mep-relocs.pl from include/elf/mep.h. */
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MAP(8);
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MAP(16);
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MAP(32);
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MAP(PCREL8A2);
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MAP(PCREL12A2);
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MAP(PCREL17A2);
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MAP(PCREL24A2);
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MAP(PCABS24A2);
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MAP(LOW16);
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MAP(HI16U);
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MAP(HI16S);
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MAP(GPREL);
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MAP(TPREL);
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MAP(TPREL7);
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MAP(TPREL7A2);
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MAP(TPREL7A4);
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MAP(UIMM24);
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MAP(ADDR24A4);
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MAP(GNU_VTINHERIT);
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MAP(GNU_VTENTRY);
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/* MEPRELOC:END */
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default:
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/* Pacify gcc -Wall. */
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fprintf (stderr, "mep: no reloc for code %d\n", code);
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return NULL;
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}
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if (mep_elf_howto_table[type].type != type)
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{
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fprintf (stderr, "MeP: howto %d has type %d\n", type, mep_elf_howto_table[type].type);
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abort ();
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}
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return mep_elf_howto_table + type;
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}
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#undef MAP
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static reloc_howto_type *
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mep_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
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{
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unsigned int i;
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for (i = 0;
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i < sizeof (mep_elf_howto_table) / sizeof (mep_elf_howto_table[0]);
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i++)
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if (mep_elf_howto_table[i].name != NULL
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&& strcasecmp (mep_elf_howto_table[i].name, r_name) == 0)
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return &mep_elf_howto_table[i];
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return NULL;
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}
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/* Perform a single relocation. */
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static struct bfd_link_info *mep_info;
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static int warn_tp = 0, warn_sda = 0;
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static bfd_vma
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mep_lookup_global
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(char * name,
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bfd_vma ofs,
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bfd_vma * cache,
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int * warn)
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{
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struct bfd_link_hash_entry *h;
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if (*cache || *warn)
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return *cache;
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h = bfd_link_hash_lookup (mep_info->hash, name, FALSE, FALSE, TRUE);
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if (h == 0 || h->type != bfd_link_hash_defined)
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{
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*warn = ofs + 1;
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return 0;
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}
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*cache = (h->u.def.value
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+ h->u.def.section->output_section->vma
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+ h->u.def.section->output_offset);
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return *cache;
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}
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static bfd_vma
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mep_tpoff_base (bfd_vma ofs)
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{
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static bfd_vma cache = 0;
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return mep_lookup_global ("__tpbase", ofs, &cache, &warn_tp);
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}
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static bfd_vma
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mep_sdaoff_base (bfd_vma ofs)
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{
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static bfd_vma cache = 0;
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return mep_lookup_global ("__sdabase", ofs, &cache, &warn_sda);
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}
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static bfd_reloc_status_type
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mep_final_link_relocate
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(reloc_howto_type * howto,
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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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Elf_Internal_Rela * rel,
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bfd_vma relocation)
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{
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unsigned long u;
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long s;
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unsigned char *byte;
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bfd_vma pc;
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bfd_reloc_status_type r = bfd_reloc_ok;
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int e2, e4;
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if (bfd_big_endian (input_bfd))
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{
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e2 = 0;
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e4 = 0;
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}
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else
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{
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e2 = 1;
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e4 = 3;
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}
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pc = (input_section->output_section->vma
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+ input_section->output_offset
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+ rel->r_offset);
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s = relocation + rel->r_addend;
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byte = (unsigned char *)contents + rel->r_offset;
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if (howto->type == R_MEP_PCREL24A2
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&& s == 0
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&& pc >= 0x800000)
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{
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/* This is an unreachable branch to an undefined weak function.
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Silently ignore it, since the opcode can't do that but should
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never be executed anyway. */
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return bfd_reloc_ok;
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}
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if (howto->pc_relative)
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s -= pc;
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u = (unsigned long) s;
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switch (howto->type)
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{
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/* MEPRELOC:APPLY */
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/* This section generated from bfd/mep-relocs.pl from include/elf/mep.h. */
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case R_MEP_8: /* 76543210 */
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if (u > 255) r = bfd_reloc_overflow;
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byte[0] = (u & 0xff);
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break;
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case R_MEP_16: /* fedcba9876543210 */
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if (u > 65535) r = bfd_reloc_overflow;
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byte[0^e2] = ((u >> 8) & 0xff);
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byte[1^e2] = (u & 0xff);
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break;
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case R_MEP_32: /* vutsrqponmlkjihgfedcba9876543210 */
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byte[0^e4] = ((u >> 24) & 0xff);
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byte[1^e4] = ((u >> 16) & 0xff);
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byte[2^e4] = ((u >> 8) & 0xff);
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byte[3^e4] = (u & 0xff);
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break;
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case R_MEP_PCREL8A2: /* --------7654321- */
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if (-128 > s || s > 127) r = bfd_reloc_overflow;
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byte[1^e2] = (byte[1^e2] & 0x01) | (s & 0xfe);
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break;
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case R_MEP_PCREL12A2: /* ----ba987654321- */
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if (-2048 > s || s > 2047) r = bfd_reloc_overflow;
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byte[0^e2] = (byte[0^e2] & 0xf0) | ((s >> 8) & 0x0f);
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byte[1^e2] = (byte[1^e2] & 0x01) | (s & 0xfe);
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break;
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case R_MEP_PCREL17A2: /* ----------------gfedcba987654321 */
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if (-65536 > s || s > 65535) r = bfd_reloc_overflow;
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byte[2^e2] = ((s >> 9) & 0xff);
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byte[3^e2] = ((s >> 1) & 0xff);
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break;
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case R_MEP_PCREL24A2: /* -----7654321----nmlkjihgfedcba98 */
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if (-8388608 > s || s > 8388607) r = bfd_reloc_overflow;
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byte[0^e2] = (byte[0^e2] & 0xf8) | ((s >> 5) & 0x07);
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byte[1^e2] = (byte[1^e2] & 0x0f) | ((s << 3) & 0xf0);
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byte[2^e2] = ((s >> 16) & 0xff);
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byte[3^e2] = ((s >> 8) & 0xff);
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break;
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case R_MEP_PCABS24A2: /* -----7654321----nmlkjihgfedcba98 */
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if (u > 16777215) r = bfd_reloc_overflow;
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byte[0^e2] = (byte[0^e2] & 0xf8) | ((u >> 5) & 0x07);
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byte[1^e2] = (byte[1^e2] & 0x0f) | ((u << 3) & 0xf0);
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byte[2^e2] = ((u >> 16) & 0xff);
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byte[3^e2] = ((u >> 8) & 0xff);
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break;
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case R_MEP_LOW16: /* ----------------fedcba9876543210 */
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byte[2^e2] = ((u >> 8) & 0xff);
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byte[3^e2] = (u & 0xff);
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break;
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case R_MEP_HI16U: /* ----------------vutsrqponmlkjihg */
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byte[2^e2] = ((u >> 24) & 0xff);
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byte[3^e2] = ((u >> 16) & 0xff);
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break;
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case R_MEP_HI16S: /* ----------------vutsrqponmlkjihg */
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if (s & 0x8000)
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s += 0x10000;
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byte[2^e2] = ((s >> 24) & 0xff);
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byte[3^e2] = ((s >> 16) & 0xff);
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break;
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case R_MEP_GPREL: /* ----------------fedcba9876543210 */
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s -= mep_sdaoff_base(rel->r_offset);
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if (-32768 > s || s > 32767) r = bfd_reloc_overflow;
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byte[2^e2] = ((s >> 8) & 0xff);
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byte[3^e2] = (s & 0xff);
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break;
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case R_MEP_TPREL: /* ----------------fedcba9876543210 */
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s -= mep_tpoff_base(rel->r_offset);
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if (-32768 > s || s > 32767) r = bfd_reloc_overflow;
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byte[2^e2] = ((s >> 8) & 0xff);
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byte[3^e2] = (s & 0xff);
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break;
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case R_MEP_TPREL7: /* ---------6543210 */
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u -= mep_tpoff_base(rel->r_offset);
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if (u > 127) r = bfd_reloc_overflow;
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byte[1^e2] = (byte[1^e2] & 0x80) | (u & 0x7f);
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break;
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case R_MEP_TPREL7A2: /* ---------654321- */
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u -= mep_tpoff_base(rel->r_offset);
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if (u > 127) r = bfd_reloc_overflow;
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byte[1^e2] = (byte[1^e2] & 0x81) | (u & 0x7e);
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break;
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case R_MEP_TPREL7A4: /* ---------65432-- */
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u -= mep_tpoff_base(rel->r_offset);
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if (u > 127) r = bfd_reloc_overflow;
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byte[1^e2] = (byte[1^e2] & 0x83) | (u & 0x7c);
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break;
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case R_MEP_UIMM24: /* --------76543210nmlkjihgfedcba98 */
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if (u > 16777215) r = bfd_reloc_overflow;
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byte[1^e2] = (u & 0xff);
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byte[2^e2] = ((u >> 16) & 0xff);
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byte[3^e2] = ((u >> 8) & 0xff);
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break;
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case R_MEP_ADDR24A4: /* --------765432--nmlkjihgfedcba98 */
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if (u > 16777215) r = bfd_reloc_overflow;
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byte[1^e2] = (byte[1^e2] & 0x03) | (u & 0xfc);
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byte[2^e2] = ((u >> 16) & 0xff);
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byte[3^e2] = ((u >> 8) & 0xff);
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break;
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case R_MEP_GNU_VTINHERIT: /* ---------------- */
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break;
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case R_MEP_GNU_VTENTRY: /* ---------------- */
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break;
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/* MEPRELOC:END */
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default:
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abort ();
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}
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return r;
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}
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/* Set the howto pointer for a MEP ELF reloc. */
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static void
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mep_info_to_howto_rela
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(bfd * abfd ATTRIBUTE_UNUSED,
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arelent * cache_ptr,
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Elf_Internal_Rela * dst)
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{
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unsigned int r_type;
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r_type = ELF32_R_TYPE (dst->r_info);
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cache_ptr->howto = & mep_elf_howto_table [r_type];
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}
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/* Look through the relocs for a section during the first phase.
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Since we don't do .gots or .plts, we just need to consider the
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virtual table relocs for gc. */
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static bfd_boolean
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mep_elf_check_relocs
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(bfd * abfd,
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struct bfd_link_info * info,
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asection * sec,
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const Elf_Internal_Rela * relocs)
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{
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Elf_Internal_Shdr * symtab_hdr;
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struct elf_link_hash_entry ** sym_hashes;
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struct elf_link_hash_entry ** sym_hashes_end;
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const Elf_Internal_Rela * rel;
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const Elf_Internal_Rela * rel_end;
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if (info->relocatable)
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return TRUE;
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symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
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sym_hashes = elf_sym_hashes (abfd);
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sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
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if (!elf_bad_symtab (abfd))
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sym_hashes_end -= symtab_hdr->sh_info;
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rel_end = relocs + sec->reloc_count;
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for (rel = relocs; rel < rel_end; rel++)
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{
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struct elf_link_hash_entry *h;
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unsigned long r_symndx;
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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];
|
||
}
|
||
return TRUE;
|
||
}
|
||
|
||
|
||
/* Relocate a MEP ELF section.
|
||
There is some attempt to make this function usable for many architectures,
|
||
both USE_REL and USE_RELA ['twould be nice if such a critter existed],
|
||
if only to serve as a learning tool.
|
||
|
||
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
|
||
mep_elf_relocate_section
|
||
(bfd * output_bfd ATTRIBUTE_UNUSED,
|
||
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;
|
||
|
||
symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
|
||
sym_hashes = elf_sym_hashes (input_bfd);
|
||
relend = relocs + input_section->reloc_count;
|
||
|
||
mep_info = info;
|
||
|
||
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;
|
||
|
||
r_type = ELF32_R_TYPE (rel->r_info);
|
||
|
||
r_symndx = ELF32_R_SYM (rel->r_info);
|
||
|
||
/* Is this a complex relocation? */
|
||
if (!info->relocatable && ELF32_R_TYPE (rel->r_info) == R_RELC)
|
||
{
|
||
bfd_elf_perform_complex_relocation (output_bfd, info,
|
||
input_bfd, input_section, contents,
|
||
rel, local_syms, local_sections);
|
||
continue;
|
||
}
|
||
|
||
howto = mep_elf_howto_table + ELF32_R_TYPE (rel->r_info);
|
||
h = NULL;
|
||
sym = NULL;
|
||
sec = NULL;
|
||
|
||
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);
|
||
|
||
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;
|
||
#if 0
|
||
fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n",
|
||
sec->name, name, sym->st_name,
|
||
sec->output_section->vma, sec->output_offset,
|
||
sym->st_value, rel->r_addend);
|
||
#endif
|
||
}
|
||
else
|
||
{
|
||
relocation = 0;
|
||
h = sym_hashes [r_symndx];
|
||
|
||
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)
|
||
{
|
||
sec = h->root.u.def.section;
|
||
relocation = (h->root.u.def.value
|
||
+ sec->output_section->vma
|
||
+ sec->output_offset);
|
||
#if 0
|
||
fprintf (stderr,
|
||
"defined: sec: %s, name: %s, value: %x + %x + %x gives: %x\n",
|
||
sec->name, name, h->root.u.def.value,
|
||
sec->output_section->vma, sec->output_offset, relocation);
|
||
#endif
|
||
}
|
||
else if (h->root.type == bfd_link_hash_undefweak)
|
||
{
|
||
#if 0
|
||
fprintf (stderr, "undefined: sec: %s, name: %s\n",
|
||
sec->name, name);
|
||
#endif
|
||
}
|
||
else if (!info->relocatable)
|
||
{
|
||
if (! ((*info->callbacks->undefined_symbol)
|
||
(info, h->root.root.string, input_bfd,
|
||
input_section, rel->r_offset,
|
||
(!info->shared && info->unresolved_syms_in_objects == RM_GENERATE_ERROR))))
|
||
return FALSE;
|
||
#if 0
|
||
fprintf (stderr, "unknown: name: %s\n", name);
|
||
#endif
|
||
}
|
||
}
|
||
|
||
if (sec != NULL && elf_discarded_section (sec))
|
||
{
|
||
/* For relocs against symbols from removed linkonce sections,
|
||
or sections discarded by a linker script, we just want the
|
||
section contents zeroed. Avoid any special processing. */
|
||
_bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
|
||
rel->r_info = 0;
|
||
rel->r_addend = 0;
|
||
continue;
|
||
}
|
||
|
||
if (info->relocatable)
|
||
{
|
||
/* This is a relocatable link. We don't have to change
|
||
anything, unless the reloc is against a section symbol,
|
||
in which case we have to adjust according to where the
|
||
section symbol winds up in the output section. */
|
||
if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
|
||
rel->r_addend += sec->output_offset;
|
||
continue;
|
||
}
|
||
|
||
switch (r_type)
|
||
{
|
||
default:
|
||
r = mep_final_link_relocate (howto, input_bfd, input_section,
|
||
contents, rel, relocation);
|
||
break;
|
||
}
|
||
|
||
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;
|
||
}
|
||
}
|
||
|
||
if (warn_tp)
|
||
info->callbacks->undefined_symbol
|
||
(info, "__tpbase", input_bfd, input_section, warn_tp-1, TRUE);
|
||
if (warn_sda)
|
||
info->callbacks->undefined_symbol
|
||
(info, "__sdabase", input_bfd, input_section, warn_sda-1, TRUE);
|
||
if (warn_sda || warn_tp)
|
||
return FALSE;
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
|
||
/* Update the got entry reference counts for the section being
|
||
removed. */
|
||
|
||
static bfd_boolean
|
||
mep_elf_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;
|
||
}
|
||
|
||
/* Return the section that should be marked against GC for a given
|
||
relocation. */
|
||
|
||
static asection *
|
||
mep_elf_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))
|
||
{
|
||
default:
|
||
switch (h->root.type)
|
||
{
|
||
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;
|
||
|
||
default:
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (!(elf_bad_symtab (sec->owner)
|
||
&& ELF_ST_BIND (sym->st_info) != STB_LOCAL)
|
||
&& ! ((sym->st_shndx <= 0 || sym->st_shndx >= SHN_LORESERVE)
|
||
&& sym->st_shndx != SHN_COMMON))
|
||
return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
|
||
/* Function to set the ELF flag bits. */
|
||
|
||
static bfd_boolean
|
||
mep_elf_set_private_flags (bfd * abfd,
|
||
flagword flags)
|
||
{
|
||
elf_elfheader (abfd)->e_flags = flags;
|
||
elf_flags_init (abfd) = TRUE;
|
||
return TRUE;
|
||
}
|
||
|
||
static bfd_boolean
|
||
mep_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;
|
||
|
||
elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
|
||
elf_flags_init (obfd) = TRUE;
|
||
|
||
/* Copy object attributes. */
|
||
_bfd_elf_copy_obj_attributes (ibfd, obfd);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Merge backend specific data from an object file to the output
|
||
object file when linking. */
|
||
|
||
static bfd_boolean
|
||
mep_elf_merge_private_bfd_data (bfd * ibfd, bfd * obfd)
|
||
{
|
||
static bfd *last_ibfd = 0;
|
||
flagword old_flags, new_flags;
|
||
flagword old_partial, new_partial;
|
||
|
||
/* Check if we have the same endianess. */
|
||
if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
|
||
return FALSE;
|
||
|
||
new_flags = elf_elfheader (ibfd)->e_flags;
|
||
old_flags = elf_elfheader (obfd)->e_flags;
|
||
|
||
#ifdef DEBUG
|
||
_bfd_error_handler ("%B: old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s",
|
||
ibfd, old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no");
|
||
#endif
|
||
|
||
/* First call, no flags set. */
|
||
if (!elf_flags_init (obfd))
|
||
{
|
||
elf_flags_init (obfd) = TRUE;
|
||
old_flags = new_flags;
|
||
}
|
||
else if ((new_flags | old_flags) & EF_MEP_LIBRARY)
|
||
{
|
||
/* Non-library flags trump library flags. The choice doesn't really
|
||
matter if both OLD_FLAGS and NEW_FLAGS have EF_MEP_LIBRARY set. */
|
||
if (old_flags & EF_MEP_LIBRARY)
|
||
old_flags = new_flags;
|
||
}
|
||
else
|
||
{
|
||
/* Make sure they're for the same mach. Allow upgrade from the "mep"
|
||
mach. */
|
||
new_partial = (new_flags & EF_MEP_CPU_MASK);
|
||
old_partial = (old_flags & EF_MEP_CPU_MASK);
|
||
if (new_partial == old_partial)
|
||
;
|
||
else if (new_partial == EF_MEP_CPU_MEP)
|
||
;
|
||
else if (old_partial == EF_MEP_CPU_MEP)
|
||
old_flags = (old_flags & ~EF_MEP_CPU_MASK) | new_partial;
|
||
else
|
||
{
|
||
_bfd_error_handler (_("%B and %B are for different cores"), last_ibfd, ibfd);
|
||
bfd_set_error (bfd_error_invalid_target);
|
||
return FALSE;
|
||
}
|
||
|
||
/* Make sure they're for the same me_module. Allow basic config to
|
||
mix with any other. */
|
||
new_partial = (new_flags & EF_MEP_INDEX_MASK);
|
||
old_partial = (old_flags & EF_MEP_INDEX_MASK);
|
||
if (new_partial == old_partial)
|
||
;
|
||
else if (new_partial == 0)
|
||
;
|
||
else if (old_partial == 0)
|
||
old_flags = (old_flags & ~EF_MEP_INDEX_MASK) | new_partial;
|
||
else
|
||
{
|
||
_bfd_error_handler (_("%B and %B are for different configurations"), last_ibfd, ibfd);
|
||
bfd_set_error (bfd_error_invalid_target);
|
||
return FALSE;
|
||
}
|
||
}
|
||
|
||
elf_elfheader (obfd)->e_flags = old_flags;
|
||
last_ibfd = ibfd;
|
||
return TRUE;
|
||
}
|
||
|
||
/* This will be edited by the MeP configration tool. */
|
||
static const char * config_names[] =
|
||
{
|
||
"basic"
|
||
/* start-mepcfgtool */
|
||
,"simple"
|
||
,"fmax"
|
||
/* end-mepcfgtool */
|
||
};
|
||
|
||
static const char * core_names[] =
|
||
{
|
||
"MeP", "MeP-c2", "MeP-c3", "MeP-h1"
|
||
};
|
||
|
||
static bfd_boolean
|
||
mep_elf_print_private_bfd_data (bfd * abfd, void * ptr)
|
||
{
|
||
FILE * file = (FILE *) ptr;
|
||
flagword flags, partial_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;
|
||
fprintf (file, _("private flags = 0x%lx"), (long)flags);
|
||
|
||
partial_flags = (flags & EF_MEP_CPU_MASK) >> 24;
|
||
if (partial_flags < ARRAY_SIZE (core_names))
|
||
fprintf (file, " core: %s", core_names[(long)partial_flags]);
|
||
|
||
partial_flags = flags & EF_MEP_INDEX_MASK;
|
||
if (partial_flags < ARRAY_SIZE (config_names))
|
||
fprintf (file, " me_module: %s", config_names[(long)partial_flags]);
|
||
|
||
fputc ('\n', file);
|
||
|
||
return TRUE;
|
||
}
|
||
|
||
/* Return the machine subcode from the ELF e_flags header. */
|
||
|
||
static int
|
||
elf32_mep_machine (bfd * abfd)
|
||
{
|
||
switch (elf_elfheader (abfd)->e_flags & EF_MEP_CPU_MASK)
|
||
{
|
||
default: break;
|
||
case EF_MEP_CPU_C2: return bfd_mach_mep;
|
||
case EF_MEP_CPU_C3: return bfd_mach_mep;
|
||
case EF_MEP_CPU_C4: return bfd_mach_mep;
|
||
case EF_MEP_CPU_H1: return bfd_mach_mep_h1;
|
||
}
|
||
|
||
return bfd_mach_mep;
|
||
}
|
||
|
||
static bfd_boolean
|
||
mep_elf_object_p (bfd * abfd)
|
||
{
|
||
/* Irix 5 and 6 is broken. Object file symbol tables are not always
|
||
sorted correctly such that local symbols preceed global symbols,
|
||
and the sh_info field in the symbol table is not always right. */
|
||
/* This is needed for the RELC support code. */
|
||
elf_bad_symtab (abfd) = TRUE;
|
||
bfd_default_set_arch_mach (abfd, bfd_arch_mep, elf32_mep_machine (abfd));
|
||
return TRUE;
|
||
}
|
||
|
||
static bfd_boolean
|
||
mep_elf_section_flags (flagword * flags, const Elf_Internal_Shdr * hdr)
|
||
{
|
||
if (hdr->sh_flags & SHF_MEP_VLIW)
|
||
* flags |= SEC_MEP_VLIW;
|
||
return TRUE;
|
||
}
|
||
|
||
static bfd_boolean
|
||
mep_elf_fake_sections (bfd * abfd ATTRIBUTE_UNUSED,
|
||
Elf_Internal_Shdr * hdr,
|
||
asection * sec)
|
||
{
|
||
if (sec->flags & SEC_MEP_VLIW)
|
||
hdr->sh_flags |= SHF_MEP_VLIW;
|
||
return TRUE;
|
||
}
|
||
|
||
|
||
#define ELF_ARCH bfd_arch_mep
|
||
#define ELF_MACHINE_CODE EM_CYGNUS_MEP
|
||
#define ELF_MAXPAGESIZE 0x1000
|
||
|
||
#define TARGET_BIG_SYM bfd_elf32_mep_vec
|
||
#define TARGET_BIG_NAME "elf32-mep"
|
||
|
||
#define TARGET_LITTLE_SYM bfd_elf32_mep_little_vec
|
||
#define TARGET_LITTLE_NAME "elf32-mep-little"
|
||
|
||
#define elf_info_to_howto_rel NULL
|
||
#define elf_info_to_howto mep_info_to_howto_rela
|
||
#define elf_backend_relocate_section mep_elf_relocate_section
|
||
#define elf_backend_gc_mark_hook mep_elf_gc_mark_hook
|
||
#define elf_backend_gc_sweep_hook mep_elf_gc_sweep_hook
|
||
#define elf_backend_check_relocs mep_elf_check_relocs
|
||
#define elf_backend_object_p mep_elf_object_p
|
||
#define elf_backend_section_flags mep_elf_section_flags
|
||
#define elf_backend_fake_sections mep_elf_fake_sections
|
||
|
||
#define elf_backend_can_gc_sections 1
|
||
|
||
#define bfd_elf32_bfd_reloc_type_lookup mep_reloc_type_lookup
|
||
#define bfd_elf32_bfd_reloc_name_lookup mep_reloc_name_lookup
|
||
#define bfd_elf32_bfd_set_private_flags mep_elf_set_private_flags
|
||
#define bfd_elf32_bfd_copy_private_bfd_data mep_elf_copy_private_bfd_data
|
||
#define bfd_elf32_bfd_merge_private_bfd_data mep_elf_merge_private_bfd_data
|
||
#define bfd_elf32_bfd_print_private_bfd_data mep_elf_print_private_bfd_data
|
||
|
||
/* We use only the RELA entries. */
|
||
#define USE_RELA
|
||
|
||
#include "elf32-target.h"
|