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authorDave Brolley <brolley@redhat.com>2007-02-05 19:50:12 +0000
committerDave Brolley <brolley@redhat.com>2007-02-05 19:50:12 +0000
commitd93525185ce69a5f63029f41e439e4cc8869e210 (patch)
tree69bccf971c2c0ee67bc42709708f2782ca1e1c47 /bfd/elf32-mep.c
parent9e5a05682cf4ef027e1a56c1a896967390644e0d (diff)
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Support for Toshiba MeP and for complex relocations.
Diffstat (limited to 'bfd/elf32-mep.c')
-rw-r--r--bfd/elf32-mep.c940
1 files changed, 940 insertions, 0 deletions
diff --git a/bfd/elf32-mep.c b/bfd/elf32-mep.c
new file mode 100644
index 0000000..4036d1e
--- /dev/null
+++ b/bfd/elf32-mep.c
@@ -0,0 +1,940 @@
+/* MeP-specific support for 32-bit ELF.
+ Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006
+ Free Software Foundation, Inc.
+
+ This file is part of BFD, the Binary File Descriptor library.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#include "bfd.h"
+#include "sysdep.h"
+#include "libbfd.h"
+#include "elf-bfd.h"
+#include "elf/mep.h"
+#include "libiberty.h"
+
+/* Forward declarations. */
+
+/* Private relocation functions. */
+
+#define MEPREL(type, size, bits, right, left, pcrel, overflow, mask) \
+ {(unsigned)type, right, size, bits, pcrel, left, overflow, mep_reloc, #type, FALSE, 0, mask, 0 }
+
+#define N complain_overflow_dont
+#define S complain_overflow_signed
+#define U complain_overflow_unsigned
+
+static bfd_reloc_status_type mep_reloc (bfd *, arelent *, struct bfd_symbol *,
+ void *, asection *, bfd *, char **);
+
+static reloc_howto_type mep_elf_howto_table [] =
+{
+ /* type, size, bits, leftshift, rightshift, pcrel, OD/OS/OU, mask. */
+ MEPREL (R_MEP_NONE, 0, 0, 0, 0, 0, N, 0),
+ MEPREL (R_RELC, 0, 0, 0, 0, 0, N, 0),
+ /* MEPRELOC:HOWTO */
+ /* This section generated from bfd/mep-relocs.pl from include/elf/mep.h. */
+ MEPREL (R_MEP_8, 0, 8, 0, 0, 0, U, 0xff),
+ MEPREL (R_MEP_16, 1, 16, 0, 0, 0, U, 0xffff),
+ MEPREL (R_MEP_32, 2, 32, 0, 0, 0, U, 0xffffffff),
+ MEPREL (R_MEP_PCREL8A2, 1, 8, 1, 1, 1, S, 0x00fe),
+ MEPREL (R_MEP_PCREL12A2,1, 12, 1, 1, 1, S, 0x0ffe),
+ MEPREL (R_MEP_PCREL17A2,2, 17, 0, 1, 1, S, 0x0000ffff),
+ MEPREL (R_MEP_PCREL24A2,2, 24, 0, 1, 1, S, 0x07f0ffff),
+ MEPREL (R_MEP_PCABS24A2,2, 24, 0, 1, 0, U, 0x07f0ffff),
+ MEPREL (R_MEP_LOW16, 2, 16, 0, 0, 0, N, 0x0000ffff),
+ MEPREL (R_MEP_HI16U, 2, 32, 0,16, 0, N, 0x0000ffff),
+ MEPREL (R_MEP_HI16S, 2, 32, 0,16, 0, N, 0x0000ffff),
+ MEPREL (R_MEP_GPREL, 2, 16, 0, 0, 0, S, 0x0000ffff),
+ MEPREL (R_MEP_TPREL, 2, 16, 0, 0, 0, S, 0x0000ffff),
+ MEPREL (R_MEP_TPREL7, 1, 7, 0, 0, 0, U, 0x007f),
+ MEPREL (R_MEP_TPREL7A2, 1, 7, 1, 1, 0, U, 0x007e),
+ MEPREL (R_MEP_TPREL7A4, 1, 7, 2, 2, 0, U, 0x007c),
+ MEPREL (R_MEP_UIMM24, 2, 24, 0, 0, 0, U, 0x00ffffff),
+ MEPREL (R_MEP_ADDR24A4, 2, 24, 0, 2, 0, U, 0x00fcffff),
+ MEPREL (R_MEP_GNU_VTINHERIT,1, 0,16,32, 0, N, 0x0000),
+ MEPREL (R_MEP_GNU_VTENTRY,1, 0,16,32, 0, N, 0x0000),
+ /* MEPRELOC:END */
+};
+
+#define VALID_MEP_RELOC(N) ((N) >= 0 \
+ && (N) < ARRAY_SIZE (mep_elf_howto_table)
+
+#undef N
+#undef S
+#undef U
+
+static bfd_reloc_status_type
+mep_reloc
+ (bfd * abfd ATTRIBUTE_UNUSED,
+ arelent * reloc_entry ATTRIBUTE_UNUSED,
+ struct bfd_symbol * symbol ATTRIBUTE_UNUSED,
+ void * data ATTRIBUTE_UNUSED,
+ asection * input_section ATTRIBUTE_UNUSED,
+ bfd * output_bfd ATTRIBUTE_UNUSED,
+ char ** error_message ATTRIBUTE_UNUSED)
+{
+ return bfd_reloc_ok;
+}
+
+
+
+#define BFD_RELOC_MEP_NONE BFD_RELOC_NONE
+#if defined (__STDC__) || defined (ALMOST_STDC) || defined (HAVE_STRINGIZE)
+#define MAP(n) case BFD_RELOC_MEP_##n: type = R_MEP_##n; break
+#else
+#define MAP(n) case BFD_RELOC_MEP_/**/n: type = R_MEP_/**/n; break
+#endif
+
+static reloc_howto_type *
+mep_reloc_type_lookup
+ (bfd * abfd ATTRIBUTE_UNUSED,
+ bfd_reloc_code_real_type code)
+{
+ unsigned int type = 0;
+
+ switch (code)
+ {
+ MAP(NONE);
+ case BFD_RELOC_8:
+ type = R_MEP_8;
+ break;
+ case BFD_RELOC_16:
+ type = R_MEP_16;
+ break;
+ case BFD_RELOC_32:
+ type = R_MEP_32;
+ break;
+ case BFD_RELOC_VTABLE_ENTRY:
+ type = R_MEP_GNU_VTENTRY;
+ break;
+ case BFD_RELOC_VTABLE_INHERIT:
+ type = R_MEP_GNU_VTINHERIT;
+ break;
+ case BFD_RELOC_RELC:
+ type = R_RELC;
+ break;
+
+ /* MEPRELOC:MAP */
+ /* This section generated from bfd/mep-relocs.pl from include/elf/mep.h. */
+ MAP(8);
+ MAP(16);
+ MAP(32);
+ MAP(PCREL8A2);
+ MAP(PCREL12A2);
+ MAP(PCREL17A2);
+ MAP(PCREL24A2);
+ MAP(PCABS24A2);
+ MAP(LOW16);
+ MAP(HI16U);
+ MAP(HI16S);
+ MAP(GPREL);
+ MAP(TPREL);
+ MAP(TPREL7);
+ MAP(TPREL7A2);
+ MAP(TPREL7A4);
+ MAP(UIMM24);
+ MAP(ADDR24A4);
+ MAP(GNU_VTINHERIT);
+ MAP(GNU_VTENTRY);
+ /* MEPRELOC:END */
+
+ default:
+ /* Pacify gcc -Wall. */
+ fprintf (stderr, "mep: no reloc for code %d\n", code);
+ return NULL;
+ }
+
+ if (mep_elf_howto_table[type].type != type)
+ {
+ fprintf (stderr, "MeP: howto %d has type %d\n", type, mep_elf_howto_table[type].type);
+ abort ();
+ }
+
+ return mep_elf_howto_table + type;
+}
+
+#undef MAP
+
+
+/* Perform a single relocation. */
+
+static struct bfd_link_info *mep_info;
+static int warn_tp = 0, warn_sda = 0;
+
+static bfd_vma
+mep_lookup_global
+ (char * name,
+ bfd_vma ofs,
+ bfd_vma * cache,
+ int * warn)
+{
+ struct bfd_link_hash_entry *h;
+
+ if (*cache || *warn)
+ return *cache;
+
+ h = bfd_link_hash_lookup (mep_info->hash, name, FALSE, FALSE, TRUE);
+ if (h == 0 || h->type != bfd_link_hash_defined)
+ {
+ *warn = ofs + 1;
+ return 0;
+ }
+ *cache = (h->u.def.value
+ + h->u.def.section->output_section->vma
+ + h->u.def.section->output_offset);
+ return *cache;
+}
+
+static bfd_vma
+mep_tpoff_base (bfd_vma ofs)
+{
+ static bfd_vma cache = 0;
+ return mep_lookup_global ("__tpbase", ofs, &cache, &warn_tp);
+}
+
+static bfd_vma
+mep_sdaoff_base (bfd_vma ofs)
+{
+ static bfd_vma cache = 0;
+ return mep_lookup_global ("__sdabase", ofs, &cache, &warn_sda);
+}
+
+static bfd_reloc_status_type
+mep_final_link_relocate
+ (reloc_howto_type * howto,
+ bfd * input_bfd,
+ asection * input_section,
+ bfd_byte * contents,
+ Elf_Internal_Rela * rel,
+ bfd_vma relocation)
+{
+ unsigned long u;
+ long s;
+ unsigned char *byte;
+ bfd_vma pc;
+ bfd_reloc_status_type r = bfd_reloc_ok;
+ int e2, e4;
+
+ if (bfd_big_endian (input_bfd))
+ {
+ e2 = 0;
+ e4 = 0;
+ }
+ else
+ {
+ e2 = 1;
+ e4 = 3;
+ }
+
+ pc = (input_section->output_section->vma
+ + input_section->output_offset
+ + rel->r_offset);
+
+ s = relocation + rel->r_addend;
+
+ byte = (unsigned char *)contents + rel->r_offset;
+
+ if (howto->type == R_MEP_PCREL24A2
+ && s == 0
+ && pc >= 0x800000)
+ {
+ /* This is an unreachable branch to an undefined weak function.
+ Silently ignore it, since the opcode can't do that but should
+ never be executed anyway. */
+ return bfd_reloc_ok;
+ }
+
+ if (howto->pc_relative)
+ s -= pc;
+
+ u = (unsigned long) s;
+
+ switch (howto->type)
+ {
+ /* MEPRELOC:APPLY */
+ /* This section generated from bfd/mep-relocs.pl from include/elf/mep.h. */
+ case R_MEP_8: /* 76543210 */
+ if (u > 255) r = bfd_reloc_overflow;
+ byte[0] = (u & 0xff);
+ break;
+ case R_MEP_16: /* fedcba9876543210 */
+ if (u > 65535) r = bfd_reloc_overflow;
+ byte[0^e2] = ((u >> 8) & 0xff);
+ byte[1^e2] = (u & 0xff);
+ break;
+ case R_MEP_32: /* vutsrqponmlkjihgfedcba9876543210 */
+ byte[0^e4] = ((u >> 24) & 0xff);
+ byte[1^e4] = ((u >> 16) & 0xff);
+ byte[2^e4] = ((u >> 8) & 0xff);
+ byte[3^e4] = (u & 0xff);
+ break;
+ case R_MEP_PCREL8A2: /* --------7654321- */
+ if (-128 > s || s > 127) r = bfd_reloc_overflow;
+ byte[1^e2] = (byte[1^e2] & 0x01) | (s & 0xfe);
+ break;
+ case R_MEP_PCREL12A2: /* ----ba987654321- */
+ if (-2048 > s || s > 2047) r = bfd_reloc_overflow;
+ byte[0^e2] = (byte[0^e2] & 0xf0) | ((s >> 8) & 0x0f);
+ byte[1^e2] = (byte[1^e2] & 0x01) | (s & 0xfe);
+ break;
+ case R_MEP_PCREL17A2: /* ----------------gfedcba987654321 */
+ if (-65536 > s || s > 65535) r = bfd_reloc_overflow;
+ byte[2^e2] = ((s >> 9) & 0xff);
+ byte[3^e2] = ((s >> 1) & 0xff);
+ break;
+ case R_MEP_PCREL24A2: /* -----7654321----nmlkjihgfedcba98 */
+ if (-8388608 > s || s > 8388607) r = bfd_reloc_overflow;
+ byte[0^e2] = (byte[0^e2] & 0xf8) | ((s >> 5) & 0x07);
+ byte[1^e2] = (byte[1^e2] & 0x0f) | ((s << 3) & 0xf0);
+ byte[2^e2] = ((s >> 16) & 0xff);
+ byte[3^e2] = ((s >> 8) & 0xff);
+ break;
+ case R_MEP_PCABS24A2: /* -----7654321----nmlkjihgfedcba98 */
+ if (u > 16777215) r = bfd_reloc_overflow;
+ byte[0^e2] = (byte[0^e2] & 0xf8) | ((u >> 5) & 0x07);
+ byte[1^e2] = (byte[1^e2] & 0x0f) | ((u << 3) & 0xf0);
+ byte[2^e2] = ((u >> 16) & 0xff);
+ byte[3^e2] = ((u >> 8) & 0xff);
+ break;
+ case R_MEP_LOW16: /* ----------------fedcba9876543210 */
+ byte[2^e2] = ((u >> 8) & 0xff);
+ byte[3^e2] = (u & 0xff);
+ break;
+ case R_MEP_HI16U: /* ----------------vutsrqponmlkjihg */
+ byte[2^e2] = ((u >> 24) & 0xff);
+ byte[3^e2] = ((u >> 16) & 0xff);
+ break;
+ case R_MEP_HI16S: /* ----------------vutsrqponmlkjihg */
+ byte[2^e2] = ((s >> 24) & 0xff);
+ byte[3^e2] = ((s >> 16) & 0xff);
+ break;
+ case R_MEP_GPREL: /* ----------------fedcba9876543210 */
+ s -= mep_sdaoff_base(rel->r_offset);
+ if (-32768 > s || s > 32767) r = bfd_reloc_overflow;
+ byte[2^e2] = ((s >> 8) & 0xff);
+ byte[3^e2] = (s & 0xff);
+ break;
+ case R_MEP_TPREL: /* ----------------fedcba9876543210 */
+ s -= mep_tpoff_base(rel->r_offset);
+ if (-32768 > s || s > 32767) r = bfd_reloc_overflow;
+ byte[2^e2] = ((s >> 8) & 0xff);
+ byte[3^e2] = (s & 0xff);
+ break;
+ case R_MEP_TPREL7: /* ---------6543210 */
+ u -= mep_tpoff_base(rel->r_offset);
+ if (u > 127) r = bfd_reloc_overflow;
+ byte[1^e2] = (byte[1^e2] & 0x80) | (u & 0x7f);
+ break;
+ case R_MEP_TPREL7A2: /* ---------654321- */
+ u -= mep_tpoff_base(rel->r_offset);
+ if (u > 127) r = bfd_reloc_overflow;
+ byte[1^e2] = (byte[1^e2] & 0x81) | (u & 0x7e);
+ break;
+ case R_MEP_TPREL7A4: /* ---------65432-- */
+ u -= mep_tpoff_base(rel->r_offset);
+ if (u > 127) r = bfd_reloc_overflow;
+ byte[1^e2] = (byte[1^e2] & 0x83) | (u & 0x7c);
+ break;
+ case R_MEP_UIMM24: /* --------76543210nmlkjihgfedcba98 */
+ if (u > 16777215) r = bfd_reloc_overflow;
+ byte[1^e2] = (u & 0xff);
+ byte[2^e2] = ((u >> 16) & 0xff);
+ byte[3^e2] = ((u >> 8) & 0xff);
+ break;
+ case R_MEP_ADDR24A4: /* --------765432--nmlkjihgfedcba98 */
+ if (u > 16777215) r = bfd_reloc_overflow;
+ byte[1^e2] = (byte[1^e2] & 0x03) | (u & 0xfc);
+ byte[2^e2] = ((u >> 16) & 0xff);
+ byte[3^e2] = ((u >> 8) & 0xff);
+ break;
+ case R_MEP_GNU_VTINHERIT: /* ---------------- */
+ break;
+ case R_MEP_GNU_VTENTRY: /* ---------------- */
+ break;
+ /* MEPRELOC:END */
+ default:
+ abort ();
+ }
+
+ return r;
+}
+
+/* Set the howto pointer for a MEP ELF reloc. */
+
+static void
+mep_info_to_howto_rela
+ (bfd * abfd ATTRIBUTE_UNUSED,
+ arelent * cache_ptr,
+ Elf_Internal_Rela * dst)
+{
+ unsigned int r_type;
+
+ r_type = ELF32_R_TYPE (dst->r_info);
+ cache_ptr->howto = & mep_elf_howto_table [r_type];
+}
+
+/* Look through the relocs for a section during the first phase.
+ Since we don't do .gots or .plts, we just need to consider the
+ virtual table relocs for gc. */
+
+static bfd_boolean
+mep_elf_check_relocs
+ (bfd * abfd,
+ struct bfd_link_info * info,
+ asection * sec,
+ const Elf_Internal_Rela * relocs)
+{
+ Elf_Internal_Shdr * symtab_hdr;
+ struct elf_link_hash_entry ** sym_hashes;
+ struct elf_link_hash_entry ** sym_hashes_end;
+ const Elf_Internal_Rela * rel;
+ const Elf_Internal_Rela * rel_end;
+
+ if (info->relocatable)
+ return TRUE;
+
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ sym_hashes = elf_sym_hashes (abfd);
+ sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
+ if (!elf_bad_symtab (abfd))
+ sym_hashes_end -= symtab_hdr->sh_info;
+
+ rel_end = relocs + sec->reloc_count;
+ for (rel = relocs; rel < rel_end; rel++)
+ {
+ struct elf_link_hash_entry *h;
+ unsigned long r_symndx;
+
+ r_symndx = ELF32_R_SYM (rel->r_info);
+ if (r_symndx < symtab_hdr->sh_info)
+ h = NULL;
+ else
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ }
+ 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);
+
+ 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 (r_symndx < symtab_hdr->sh_info)
+ {
+ sym = local_syms + r_symndx;
+
+ if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
+ {
+ sec = local_sections [r_symndx];
+ rel->r_addend += sec->output_offset + sym->st_value;
+ }
+ }
+
+ continue;
+ }
+
+ /* Is this a complex relocation? */
+ if (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;
+ }
+
+ /* This is a final link. */
+ 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
+ {
+ 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
+ relocation = 0;
+ }
+ else
+ {
+ 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
+ relocation = 0;
+ }
+ }
+
+ 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;
+ 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_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"