/* Motorola 68k series support for 32-bit ELF
Copyright 1993, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
- 2004, 2005, 2006 Free Software Foundation, Inc.
+ 2004, 2005, 2006, 2007 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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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. */
+ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
-#include "bfd.h"
#include "sysdep.h"
+#include "bfd.h"
#include "bfdlink.h"
#include "libbfd.h"
#include "elf-bfd.h"
static bfd_boolean elf_m68k_check_relocs
PARAMS ((bfd *, struct bfd_link_info *, asection *,
const Elf_Internal_Rela *));
-static asection *elf_m68k_gc_mark_hook
- PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
- struct elf_link_hash_entry *, Elf_Internal_Sym *));
-static bfd_boolean elf_m68k_gc_sweep_hook
- PARAMS ((bfd *, struct bfd_link_info *, asection *,
- const Elf_Internal_Rela *));
static bfd_boolean elf_m68k_adjust_dynamic_symbol
PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
static bfd_boolean elf_m68k_size_dynamic_sections
return 0;
}
+static reloc_howto_type *
+reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
+{
+ unsigned int i;
+
+ for (i = 0; i < sizeof (howto_table) / sizeof (howto_table[0]); i++)
+ if (howto_table[i].name != NULL
+ && strcasecmp (howto_table[i].name, r_name) == 0)
+ return &howto_table[i];
+
+ return NULL;
+}
+
#define bfd_elf32_bfd_reloc_type_lookup reloc_type_lookup
+#define bfd_elf32_bfd_reloc_name_lookup reloc_name_lookup
#define ELF_ARCH bfd_arch_m68k
\f
/* Functions for the m68k ELF linker. */
elf_isab_plt_entry, { 2, 20 }, 12
};
+#define ISAC_PLT_ENTRY_SIZE 24
+
+static const bfd_byte elf_isac_plt0_entry[ISAC_PLT_ENTRY_SIZE] =
+{
+ 0x20, 0x3c, /* move.l #offset,%d0 */
+ 0, 0, 0, 0, /* replaced with .got + 4 - . */
+ 0x2e, 0xbb, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l),(%sp) */
+ 0x20, 0x3c, /* move.l #offset,%d0 */
+ 0, 0, 0, 0, /* replaced with .got + 8 - . */
+ 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
+ 0x4e, 0xd0, /* jmp (%a0) */
+ 0x4e, 0x71 /* nop */
+};
+
+/* Subsequent entries in a procedure linkage table look like this. */
+
+static const bfd_byte elf_isac_plt_entry[ISAC_PLT_ENTRY_SIZE] =
+{
+ 0x20, 0x3c, /* move.l #offset,%d0 */
+ 0, 0, 0, 0, /* replaced with (.got entry) - . */
+ 0x20, 0x7b, 0x08, 0xfa, /* move.l (-6,%pc,%d0:l), %a0 */
+ 0x4e, 0xd0, /* jmp (%a0) */
+ 0x2f, 0x3c, /* move.l #offset,-(%sp) */
+ 0, 0, 0, 0, /* replaced with offset into relocation table */
+ 0x61, 0xff, /* bsr.l .plt */
+ 0, 0, 0, 0 /* replaced with .plt - . */
+};
+
+static const struct elf_m68k_plt_info elf_isac_plt_info = {
+ ISAC_PLT_ENTRY_SIZE,
+ elf_isac_plt0_entry, { 2, 12},
+ elf_isac_plt_entry, { 2, 20 }, 12
+};
+
#define CPU32_PLT_ENTRY_SIZE 24
/* Procedure linkage table entries for the cpu32 */
static const bfd_byte elf_cpu32_plt0_entry[CPU32_PLT_ENTRY_SIZE] =
unsigned features = 0;
flagword eflags = elf_elfheader (abfd)->e_flags;
- if (eflags & EF_M68K_M68000)
+ if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_M68000)
features |= m68000;
- else if (eflags & EF_M68K_CPU32)
+ else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32)
features |= cpu32;
- else if (eflags & EF_M68K_ISA_MASK)
+ else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
+ features |= fido_a;
+ else
{
- switch (eflags & EF_M68K_ISA_MASK)
+ switch (eflags & EF_M68K_CF_ISA_MASK)
{
- case EF_M68K_ISA_A_NODIV:
+ case EF_M68K_CF_ISA_A_NODIV:
features |= mcfisa_a;
break;
- case EF_M68K_ISA_A:
+ case EF_M68K_CF_ISA_A:
features |= mcfisa_a|mcfhwdiv;
break;
- case EF_M68K_ISA_A_PLUS:
+ case EF_M68K_CF_ISA_A_PLUS:
features |= mcfisa_a|mcfisa_aa|mcfhwdiv|mcfusp;
break;
- case EF_M68K_ISA_B_NOUSP:
+ case EF_M68K_CF_ISA_B_NOUSP:
features |= mcfisa_a|mcfisa_b|mcfhwdiv;
break;
- case EF_M68K_ISA_B:
+ case EF_M68K_CF_ISA_B:
features |= mcfisa_a|mcfisa_b|mcfhwdiv|mcfusp;
break;
+ case EF_M68K_CF_ISA_C:
+ features |= mcfisa_a|mcfisa_c|mcfhwdiv|mcfusp;
+ break;
+ case EF_M68K_CF_ISA_C_NODIV:
+ features |= mcfisa_a|mcfisa_c|mcfusp;
+ break;
}
- switch (eflags & EF_M68K_MAC_MASK)
+ switch (eflags & EF_M68K_CF_MAC_MASK)
{
- case EF_M68K_MAC:
+ case EF_M68K_CF_MAC:
features |= mcfmac;
break;
- case EF_M68K_EMAC:
+ case EF_M68K_CF_EMAC:
features |= mcfemac;
break;
}
- if (eflags & EF_M68K_FLOAT)
+ if (eflags & EF_M68K_CF_FLOAT)
features |= cfloat;
}
else
{
out_flags = elf_elfheader (obfd)->e_flags;
- in_isa = (in_flags & EF_M68K_ISA_MASK);
- out_isa = (out_flags & EF_M68K_ISA_MASK);
+ unsigned int variant_mask;
+
+ if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_M68000)
+ variant_mask = 0;
+ else if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32)
+ variant_mask = 0;
+ else if ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
+ variant_mask = 0;
+ else
+ variant_mask = EF_M68K_CF_ISA_MASK;
+
+ in_isa = (in_flags & variant_mask);
+ out_isa = (out_flags & variant_mask);
if (in_isa > out_isa)
out_flags ^= in_isa ^ out_isa;
+ if (((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32
+ && (out_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
+ || ((in_flags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO
+ && (out_flags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32))
+ out_flags = EF_M68K_FIDO;
+ else
out_flags |= in_flags ^ in_isa;
}
elf_elfheader (obfd)->e_flags = out_flags;
/* xgettext:c-format */
fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
- if (eflags & EF_M68K_CPU32)
- fprintf (file, " [cpu32]");
-
- if (eflags & EF_M68K_M68000)
+ if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_M68000)
fprintf (file, " [m68000]");
-
- if (eflags & EF_M68K_CFV4E)
- fprintf (file, " [cfv4e]");
-
- if (eflags & EF_M68K_ISA_MASK)
+ else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CPU32)
+ fprintf (file, " [cpu32]");
+ else if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_FIDO)
+ fprintf (file, " [fido]");
+ else
{
- char const *isa = _("unknown");
- char const *mac = _("unknown");
- char const *additional = "";
-
- switch (eflags & EF_M68K_ISA_MASK)
- {
- case EF_M68K_ISA_A_NODIV:
- isa = "A";
- additional = " [nodiv]";
- break;
- case EF_M68K_ISA_A:
- isa = "A";
- break;
- case EF_M68K_ISA_A_PLUS:
- isa = "A+";
- break;
- case EF_M68K_ISA_B_NOUSP:
- isa = "B";
- additional = " [nousp]";
- break;
- case EF_M68K_ISA_B:
- isa = "B";
- break;
- }
- fprintf (file, " [isa %s]%s", isa, additional);
- if (eflags & EF_M68K_FLOAT)
- fprintf (file, " [float]");
- switch (eflags & EF_M68K_MAC_MASK)
+ if ((eflags & EF_M68K_ARCH_MASK) == EF_M68K_CFV4E)
+ fprintf (file, " [cfv4e]");
+
+ if (eflags & EF_M68K_CF_ISA_MASK)
{
- case 0:
- mac = NULL;
- break;
- case EF_M68K_MAC:
- mac = "mac";
- break;
- case EF_M68K_EMAC:
- mac = "emac";
- break;
+ char const *isa = _("unknown");
+ char const *mac = _("unknown");
+ char const *additional = "";
+
+ switch (eflags & EF_M68K_CF_ISA_MASK)
+ {
+ case EF_M68K_CF_ISA_A_NODIV:
+ isa = "A";
+ additional = " [nodiv]";
+ break;
+ case EF_M68K_CF_ISA_A:
+ isa = "A";
+ break;
+ case EF_M68K_CF_ISA_A_PLUS:
+ isa = "A+";
+ break;
+ case EF_M68K_CF_ISA_B_NOUSP:
+ isa = "B";
+ additional = " [nousp]";
+ break;
+ case EF_M68K_CF_ISA_B:
+ isa = "B";
+ break;
+ case EF_M68K_CF_ISA_C:
+ isa = "C";
+ break;
+ case EF_M68K_CF_ISA_C_NODIV:
+ isa = "C";
+ additional = " [nodiv]";
+ break;
+ }
+ fprintf (file, " [isa %s]%s", isa, additional);
+ if (eflags & EF_M68K_CF_FLOAT)
+ fprintf (file, " [float]");
+ switch (eflags & EF_M68K_CF_MAC_MASK)
+ {
+ case 0:
+ mac = NULL;
+ break;
+ case EF_M68K_CF_MAC:
+ mac = "mac";
+ break;
+ case EF_M68K_CF_EMAC:
+ mac = "emac";
+ break;
+ }
+ if (mac)
+ fprintf (file, " [%s]", mac);
}
- if (mac)
- fprintf (file, " [%s]", mac);
}
fputc ('\n', file);
relocation. */
static asection *
-elf_m68k_gc_mark_hook (sec, info, rel, h, sym)
- asection *sec;
- struct bfd_link_info *info ATTRIBUTE_UNUSED;
- Elf_Internal_Rela *rel;
- struct elf_link_hash_entry *h;
- Elf_Internal_Sym *sym;
+elf_m68k_gc_mark_hook (asection *sec,
+ struct bfd_link_info *info,
+ Elf_Internal_Rela *rel,
+ struct elf_link_hash_entry *h,
+ Elf_Internal_Sym *sym)
{
if (h != NULL)
- {
- switch (ELF32_R_TYPE (rel->r_info))
- {
- case R_68K_GNU_VTINHERIT:
- case R_68K_GNU_VTENTRY:
- break;
-
- default:
- switch (h->root.type)
- {
- default:
- 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
- return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
-
- return NULL;
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ case R_68K_GNU_VTINHERIT:
+ case R_68K_GNU_VTENTRY:
+ return NULL;
+ }
+
+ return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
}
/* Update the got entry reference counts for the section being removed. */
static bfd_boolean
-elf_m68k_gc_sweep_hook (abfd, info, sec, relocs)
- bfd *abfd;
- struct bfd_link_info *info;
- asection *sec;
- const Elf_Internal_Rela *relocs;
+elf_m68k_gc_sweep_hook (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;
return &elf_cpu32_plt_info;
if (features & mcfisa_b)
return &elf_isab_plt_info;
+ if (features & mcfisa_c)
+ return &elf_isac_plt_info;
return &elf_m68k_plt_info;
}
struct elf_m68k_link_hash_table *htab;
bfd *dynobj;
asection *s;
- unsigned int power_of_two;
htab = elf_m68k_hash_table (info);
dynobj = elf_hash_table (info)->dynobj;
h->needs_copy = 1;
}
- /* We need to figure out the alignment required for this symbol. I
- have no idea how ELF linkers handle this. */
- power_of_two = bfd_log2 (h->size);
- if (power_of_two > 3)
- power_of_two = 3;
-
- /* Apply the required alignment. */
- s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
- if (power_of_two > bfd_get_section_alignment (dynobj, s))
- {
- if (!bfd_set_section_alignment (dynobj, s, power_of_two))
- return FALSE;
- }
-
- /* Define the symbol as being at this point in the section. */
- h->root.u.def.section = s;
- h->root.u.def.value = s->size;
-
- /* Increment the section size to make room for the symbol. */
- s->size += h->size;
-
- return TRUE;
+ return _bfd_elf_adjust_dynamic_copy (h, s);
}
/* Set the sizes of the dynamic sections. */
Elf_Internal_Rela *rel;
Elf_Internal_Rela *relend;
- if (info->relocatable)
- return TRUE;
-
dynobj = elf_hash_table (info)->dynobj;
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (input_bfd);
unresolved_reloc, warned);
}
+ 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)
+ continue;
+
switch (r_type)
{
case R_68K_GOT8:
else
{
/* This symbol is local, or marked to become local. */
+ outrel.r_addend = relocation + rel->r_addend;
+
if (r_type == R_68K_32)
{
relocate = TRUE;
outrel.r_info = ELF32_R_INFO (0, R_68K_RELATIVE);
- outrel.r_addend = relocation + rel->r_addend;
}
else
{
{
asection *osec;
+ /* We are turning this relocation into one
+ against a section symbol. It would be
+ proper to subtract the symbol's value,
+ osec->vma, from the emitted reloc addend,
+ but ld.so expects buggy relocs. */
osec = sec->output_section;
indx = elf_section_data (osec)->dynindx;
- BFD_ASSERT (indx > 0);
+ if (indx == 0)
+ {
+ struct elf_link_hash_table *htab;
+ htab = elf_hash_table (info);
+ osec = htab->text_index_section;
+ indx = elf_section_data (osec)->dynindx;
+ }
+ BFD_ASSERT (indx != 0);
}
outrel.r_info = ELF32_R_INFO (indx, r_type);
- outrel.r_addend = relocation + rel->r_addend;
}
}
elf_m68k_adjust_dynamic_symbol
#define elf_backend_size_dynamic_sections \
elf_m68k_size_dynamic_sections
+#define elf_backend_init_index_section _bfd_elf_init_1_index_section
#define elf_backend_relocate_section elf_m68k_relocate_section
#define elf_backend_finish_dynamic_symbol \
elf_m68k_finish_dynamic_symbol
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