/* Motorola MCore specific support for 32-bit ELF
- Copyright 1994, 1995, 1999 Free Software Foundation, Inc.
+ Copyright 1994, 1995, 1999, 2000, 2001 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
#include <assert.h>
#define USE_RELA /* Only USE_REL is actually significant, but this is
- here are a reminder... */
+ here are a reminder... */
static void mcore_elf_howto_init
PARAMS ((void));
PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
static boolean mcore_elf_set_private_flags
PARAMS ((bfd *, flagword));
-static boolean mcore_elf_copy_private_bfd_data
- PARAMS ((bfd *, bfd *));
static boolean mcore_elf_merge_private_bfd_data
PARAMS ((bfd *, bfd *));
static bfd_reloc_status_type mcore_elf_unsupported_reloc
static boolean mcore_elf_relocate_section
PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
+static asection * mcore_elf_gc_mark_hook
+ PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
+ struct elf_link_hash_entry *, Elf_Internal_Sym *));
+static boolean mcore_elf_gc_sweep_hook
+ PARAMS ((bfd *, struct bfd_link_info *, asection *,
+ const Elf_Internal_Rela *));
+static boolean mcore_elf_check_relocs
+ PARAMS ((bfd *, struct bfd_link_info *, asection *,
+ const Elf_Internal_Rela *));
static reloc_howto_type * mcore_elf_howto_table [(int) R_MCORE_max];
false), /* pcrel_offset */
/* 8 bits + 2 zero bits; jmpi/jsri/lrw instructions.
- Should not appear in object files. */
+ Should not appear in object files. */
HOWTO (R_MCORE_PCRELIMM8BY4, /* type */
2, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
0, /* dst_mask */
true), /* pcrel_offset */
- /* bsr/bt/bf/br instructions; 11 bits + 1 zero bit
+ /* bsr/bt/bf/br instructions; 11 bits + 1 zero bit
Span 2k instructions == 4k bytes.
Only useful pieces at the relocated address are the opcode (5 bits) */
HOWTO (R_MCORE_PCRELIMM11BY2,/* type */
0x7ff, /* dst_mask */
true), /* pcrel_offset */
- /* 4 bits + 1 zero bit; 'loopt' instruction only; unsupported. */
+ /* 4 bits + 1 zero bit; 'loopt' instruction only; unsupported. */
HOWTO (R_MCORE_PCRELIMM4BY2, /* type */
1, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
0, /* dst_mask */
true), /* pcrel_offset */
- /* 32-bit pc-relative. Eventually this will help support PIC code. */
+ /* 32-bit pc-relative. Eventually this will help support PIC code. */
HOWTO (R_MCORE_PCREL32, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
/* Like PCRELIMM11BY2, this relocation indicates that there is a
'jsri' at the specified address. There is a separate relocation
- entry for the literal pool entry that it references, but we
+ entry for the literal pool entry that it references, but we
might be able to change the jsri to a bsr if the target turns out
to be close enough [even though we won't reclaim the literal pool
entry, we'll get some runtime efficiency back]. Note that this
- is a relocation that we are allowed to safely ignore. */
+ is a relocation that we are allowed to safely ignore. */
HOWTO (R_MCORE_PCRELJSR_IMM11BY2,/* type */
1, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
0x0, /* src_mask */
0x7ff, /* dst_mask */
true), /* pcrel_offset */
-
+
/* GNU extension to record C++ vtable hierarchy */
HOWTO (R_MCORE_GNU_VTINHERIT, /* type */
0, /* rightshift */
0, /* src_mask */
0, /* dst_mask */
false), /* pcrel_offset */
-
+
HOWTO (R_MCORE_RELATIVE, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
for (i = NUM_ELEM (mcore_elf_howto_raw); i--;)
{
unsigned int type;
-
+
type = mcore_elf_howto_raw[i].type;
-
+
BFD_ASSERT (type < NUM_ELEM (mcore_elf_howto_table));
-
+
mcore_elf_howto_table [type] = & mcore_elf_howto_raw [i];
}
}
-
\f
static reloc_howto_type *
mcore_elf_reloc_type_lookup (abfd, code)
mcore_elf_howto_init ();
BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_MCORE_max);
-
+
cache_ptr->howto = mcore_elf_howto_table [ELF32_R_TYPE (dst->r_info)];
}
-/* Function to set whether a module needs the -mrelocatable bit set. */
+/* Function to set whether a module needs the -mrelocatable bit set. */
static boolean
mcore_elf_set_private_flags (abfd, flags)
bfd * abfd;
return true;
}
-/* Copy backend specific data from one object module to another. */
-static boolean
-mcore_elf_copy_private_bfd_data (ibfd, obfd)
- bfd * ibfd;
- bfd * obfd;
-{
- if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
- || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
- return true;
-
- BFD_ASSERT (! elf_flags_init (obfd)
- || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
-
- 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 boolean
flagword new_flags;
/* Check if we have the same endianess */
- if ( ibfd->xvec->byteorder != obfd->xvec->byteorder
- && obfd->xvec->byteorder != BFD_ENDIAN_UNKNOWN)
- {
- (*_bfd_error_handler)
- (_("%s: compiled for a %s endian system and target is %s endian.\n"),
- bfd_get_filename (ibfd),
- bfd_big_endian (ibfd) ? "big" : "little",
- bfd_big_endian (obfd) ? "big" : "little");
-
- bfd_set_error (bfd_error_wrong_format);
- return false;
- }
+ if (_bfd_generic_verify_endian_match (ibfd, obfd) == false)
+ return false;
if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
new_flags = elf_elfheader (ibfd)->e_flags;
old_flags = elf_elfheader (obfd)->e_flags;
-
+
if (! elf_flags_init (obfd)) /* First call, no flags set */
{
elf_flags_init (obfd) = true;
return true;
}
-
\f
/* Don't pretend we can deal with unsupported relocs. */
-/*ARGSUSED*/
static bfd_reloc_status_type
mcore_elf_unsupported_reloc (abfd, reloc_entry, symbol, data, input_section,
output_bfd, error_message)
char ** error_message ATTRIBUTE_UNUSED;
{
BFD_ASSERT (reloc_entry->howto != (reloc_howto_type *)0);
-
+
_bfd_error_handler (_("%s: Relocation %s (%d) is not currently supported.\n"),
- bfd_get_filename (abfd),
+ bfd_archive_filename (abfd),
reloc_entry->howto->name,
reloc_entry->howto->type);
return bfd_reloc_notsupported;
}
-
\f
/* The RELOCATE_SECTION function is called by the ELF backend linker
to handle the relocations for a section.
static boolean
mcore_elf_relocate_section (output_bfd, info, input_bfd, input_section,
contents, relocs, local_syms, local_sections)
- bfd * output_bfd ATTRIBUTE_UNUSED;
+ bfd * output_bfd;
struct bfd_link_info * info;
bfd * input_bfd;
asection * input_section;
#ifdef DEBUG
fprintf (stderr,
"mcore_elf_relocate_section called for %s section %s, %ld relocations%s\n",
- bfd_get_filename (input_bfd),
+ bfd_archive_filename (input_bfd),
bfd_section_name(input_bfd, input_section),
(long) input_section->reloc_count,
(info->relocateable) ? " (relocatable)" : "");
Elf_Internal_Sym * sym = (Elf_Internal_Sym *) 0;
unsigned long r_symndx;
struct elf_link_hash_entry * h = (struct elf_link_hash_entry *) 0;
- unsigned short oldinst;
-
+ unsigned short oldinst = 0;
+
/* Unknown relocation handling */
if ((unsigned) r_type >= (unsigned) R_MCORE_max
|| ! mcore_elf_howto_table [(int)r_type])
{
_bfd_error_handler (_("%s: Unknown relocation type %d\n"),
- bfd_get_filename (input_bfd),
+ bfd_archive_filename (input_bfd),
(int) r_type);
bfd_set_error (bfd_error_bad_value);
ret = false;
continue;
}
-
+
howto = mcore_elf_howto_table [(int) r_type];
r_symndx = ELF32_R_SYM (rel->r_info);
-
+
if (info->relocateable)
{
/* This is a relocateable link. We don't have to change
if (r_symndx < symtab_hdr->sh_info)
{
sym = local_syms + r_symndx;
-
+
if ((unsigned)ELF_ST_TYPE (sym->st_info) == STT_SECTION)
{
sec = local_sections[r_symndx];
/* This is a final link. */
- /* Complain about known relocation that are not yet supported */
+ /* Complain about known relocation that are not yet supported. */
if (howto->special_function == mcore_elf_unsupported_reloc)
{
_bfd_error_handler (_("%s: Relocation %s (%d) is not currently supported.\n"),
- bfd_get_filename (input_bfd),
+ bfd_archive_filename (input_bfd),
howto->name,
(int)r_type);
{
sym = local_syms + r_symndx;
sec = local_sections [r_symndx];
- relocation = (sec->output_section->vma
- + sec->output_offset
- + sym->st_value);
+ relocation = _bfd_elf_rela_local_sym (output_bfd, sym, sec, rel);
+ addend = rel->r_addend;
}
else
{
}
else if (h->root.type == bfd_link_hash_undefweak)
relocation = 0;
- else if (info->shared)
+ else if (info->shared
+ && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
relocation = 0;
else
{
case R_MCORE_PCRELJSR_IMM11BY2:
oldinst = bfd_get_16 (input_bfd, contents + offset);
#define MCORE_INST_BSR 0xF800
- bfd_put_16 (input_bfd, MCORE_INST_BSR, contents + offset);
+ bfd_put_16 (input_bfd, (bfd_vma) MCORE_INST_BSR, contents + offset);
break;
}
-
#ifdef DEBUG
fprintf (stderr, "\ttype = %s (%d), symbol index = %ld, offset = %ld, addend = %ld\n",
howto->name, r_type, r_symndx, (long) offset, (long) addend);
if (r != bfd_reloc_ok && r_type == R_MCORE_PCRELJSR_IMM11BY2)
{
/* Wasn't ok, back it out and give up. */
- bfd_put_16 (input_bfd, oldinst, contents + offset);
+ bfd_put_16 (input_bfd, (bfd_vma) oldinst, contents + offset);
r = bfd_reloc_ok;
}
-
+
if (r != bfd_reloc_ok)
{
ret = false;
-
+
switch (r)
{
default:
{
name = bfd_elf_string_from_elf_section
(input_bfd, symtab_hdr->sh_link, sym->st_name);
-
+
if (name == NULL)
break;
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;
}
else
{
- if (!(elf_bad_symtab (abfd)
- && 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 (abfd, sym->st_shndx);
- }
+ return bfd_section_from_elf_index (abfd, sym->st_shndx);
}
return NULL;
/* 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 boolean
mcore_elf_check_relocs (abfd, info, sec, relocs)
bfd * abfd;
struct elf_link_hash_entry ** sym_hashes_end;
const Elf_Internal_Rela * rel;
const Elf_Internal_Rela * rel_end;
-
+
if (info->relocateable)
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];
-
+
switch (ELF32_R_TYPE (rel->r_info))
{
/* This relocation describes the C++ object vtable hierarchy.
if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
return false;
break;
-
+
/* This relocation describes which C++ vtable entries are actually
used. Record for later use during GC. */
case R_MCORE_GNU_VTENTRY:
break;
}
}
-
+
return true;
}
#define elf_info_to_howto mcore_elf_info_to_howto
#define elf_info_to_howto_rel NULL
-
-#define bfd_elf32_bfd_copy_private_bfd_data mcore_elf_copy_private_bfd_data
#define bfd_elf32_bfd_merge_private_bfd_data mcore_elf_merge_private_bfd_data
#define bfd_elf32_bfd_set_private_flags mcore_elf_set_private_flags
#define bfd_elf32_bfd_reloc_type_lookup mcore_elf_reloc_type_lookup
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