#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/openrisc.h"
#include "libiberty.h"
static reloc_howto_type openrisc_elf_howto_table[] =
{
HOWTO (R_OPENRISC_NONE,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_OPENRISC_NONE",
FALSE,
0,
0,
FALSE),
HOWTO (R_OPENRISC_INSN_REL_26,
2,
2,
26,
TRUE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_OPENRISC_INSN_REL_26",
FALSE,
0x00000000,
0x03ffffff,
FALSE),
HOWTO (R_OPENRISC_INSN_ABS_26,
2,
2,
26,
FALSE,
0,
complain_overflow_signed,
bfd_elf_generic_reloc,
"R_OPENRISC_INSN_ABS_26",
FALSE,
0x00000000,
0x03ffffff,
FALSE),
HOWTO (R_OPENRISC_LO_16_IN_INSN,
0,
1,
16,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_OPENRISC_LO_16_IN_INSN",
FALSE,
0,
0x0000ffff,
FALSE),
HOWTO (R_OPENRISC_HI_16_IN_INSN,
16,
1,
16,
FALSE,
0,
complain_overflow_dont,
bfd_elf_generic_reloc,
"R_OPENRISC_HI_16_IN_INSN",
FALSE,
0,
0x0000ffff,
FALSE),
HOWTO (R_OPENRISC_8,
0,
0,
8,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_OPENRISC_8",
TRUE,
0x0000,
0x00ff,
FALSE),
HOWTO (R_OPENRISC_16,
0,
1,
16,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_OPENRISC_16",
TRUE,
0x00000000,
0x0000ffff,
FALSE),
HOWTO (R_OPENRISC_32,
0,
2,
32,
FALSE,
0,
complain_overflow_bitfield,
bfd_elf_generic_reloc,
"R_OPENRISC_32",
TRUE,
0x00000000,
0xffffffff,
FALSE),
HOWTO (R_OPENRISC_GNU_VTINHERIT,
0,
2,
0,
FALSE,
0,
complain_overflow_dont,
NULL,
"R_OPENRISC_GNU_VTINHERIT",
FALSE,
0,
0,
FALSE),
HOWTO (R_OPENRISC_GNU_VTENTRY,
0,
2,
0,
FALSE,
0,
complain_overflow_dont,
_bfd_elf_rel_vtable_reloc_fn,
"R_OPENRISC_GNU_VTENTRY",
FALSE,
0,
0,
FALSE),
};
struct openrisc_reloc_map
{
bfd_reloc_code_real_type bfd_reloc_val;
unsigned int openrisc_reloc_val;
};
static const struct openrisc_reloc_map openrisc_reloc_map[] =
{
{ BFD_RELOC_NONE, R_OPENRISC_NONE },
{ BFD_RELOC_32, R_OPENRISC_32 },
{ BFD_RELOC_16, R_OPENRISC_16 },
{ BFD_RELOC_8, R_OPENRISC_8 },
{ BFD_RELOC_OPENRISC_REL_26,R_OPENRISC_INSN_REL_26 },
{ BFD_RELOC_OPENRISC_ABS_26,R_OPENRISC_INSN_ABS_26 },
{ BFD_RELOC_HI16, R_OPENRISC_HI_16_IN_INSN },
{ BFD_RELOC_LO16, R_OPENRISC_LO_16_IN_INSN },
{ BFD_RELOC_VTABLE_INHERIT, R_OPENRISC_GNU_VTINHERIT },
{ BFD_RELOC_VTABLE_ENTRY, R_OPENRISC_GNU_VTENTRY }
};
static reloc_howto_type *
openrisc_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
bfd_reloc_code_real_type code)
{
unsigned int i;
for (i = ARRAY_SIZE (openrisc_reloc_map); --i;)
if (openrisc_reloc_map[i].bfd_reloc_val == code)
return & openrisc_elf_howto_table[openrisc_reloc_map[i].
openrisc_reloc_val];
return NULL;
}
static void
openrisc_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);
BFD_ASSERT (r_type < (unsigned int) R_OPENRISC_max);
cache_ptr->howto = & openrisc_elf_howto_table[r_type];
}
static bfd_reloc_status_type
openrisc_final_link_relocate (reloc_howto_type *howto,
bfd *input_bfd,
asection *input_section,
bfd_byte *contents,
Elf_Internal_Rela *rel,
bfd_vma relocation)
{
bfd_reloc_status_type r = bfd_reloc_ok;
switch (howto->type)
{
case R_OPENRISC_LO_16_IN_INSN:
relocation &= 0xffff;
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
contents, rel->r_offset,
relocation, rel->r_addend);
break;
default:
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
contents, rel->r_offset,
relocation, rel->r_addend);
}
return r;
}
static bfd_boolean
openrisc_elf_relocate_section (bfd *output_bfd,
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;
if (info->relocatable)
return TRUE;
symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (input_bfd);
relend = relocs + input_section->reloc_count;
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 (r_type == R_OPENRISC_GNU_VTINHERIT
|| r_type == R_OPENRISC_GNU_VTENTRY)
continue;
if ((unsigned int) r_type >
(sizeof openrisc_elf_howto_table / sizeof (reloc_howto_type)))
abort ();
howto = openrisc_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;
}
else
{
bfd_boolean unresolved_reloc, warned;
RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
r_symndx, symtab_hdr, sym_hashes,
h, sec, relocation,
unresolved_reloc, warned);
}
r = openrisc_final_link_relocate (howto, input_bfd, input_section,
contents, rel, relocation);
if (r != bfd_reloc_ok)
{
const char *msg = 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;
}
}
return TRUE;
}
static asection *
openrisc_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)
return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
switch (ELF32_R_TYPE (rel->r_info))
{
case R_OPENRISC_GNU_VTINHERIT:
case R_OPENRISC_GNU_VTENTRY:
break;
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;
}
}
return NULL;
}
static bfd_boolean
openrisc_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;
}
static bfd_boolean
openrisc_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, **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];
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;
}
switch (ELF32_R_TYPE (rel->r_info))
{
case R_OPENRISC_GNU_VTINHERIT:
if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
return FALSE;
break;
case R_OPENRISC_GNU_VTENTRY:
if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
return FALSE;
break;
}
}
return TRUE;
}
static bfd_boolean
openrisc_elf_object_p (bfd *abfd)
{
bfd_default_set_arch_mach (abfd, bfd_arch_openrisc, 0);
return TRUE;
}
static void
openrisc_elf_final_write_processing (bfd *abfd,
bfd_boolean linker ATTRIBUTE_UNUSED)
{
unsigned long val;
switch (bfd_get_mach (abfd))
{
default:
val = 0;
break;
}
elf_elfheader (abfd)->e_flags &= ~0xf;
elf_elfheader (abfd)->e_flags |= val;
}
#define ELF_ARCH bfd_arch_openrisc
#define ELF_MACHINE_CODE EM_OPENRISC
#define ELF_MACHINE_ALT1 EM_OPENRISC_OLD
#define ELF_MAXPAGESIZE 0x1000
#define TARGET_BIG_SYM bfd_elf32_openrisc_vec
#define TARGET_BIG_NAME "elf32-openrisc"
#define elf_info_to_howto_rel NULL
#define elf_info_to_howto openrisc_info_to_howto_rela
#define elf_backend_relocate_section openrisc_elf_relocate_section
#define elf_backend_gc_mark_hook openrisc_elf_gc_mark_hook
#define elf_backend_gc_sweep_hook openrisc_elf_gc_sweep_hook
#define elf_backend_check_relocs openrisc_elf_check_relocs
#define elf_backend_can_gc_sections 1
#define elf_backend_rela_normal 1
#define bfd_elf32_bfd_reloc_type_lookup openrisc_reloc_type_lookup
#define elf_backend_object_p openrisc_elf_object_p
#define elf_backend_final_write_processing openrisc_elf_final_write_processing
#include "elf32-target.h"