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Handle R_M32C_24 specially

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2015-01-22  DJ Delorie  <dj@redhat.com>

	* elf32-m32c.c (m32c_apply_reloc_24): New.
	(m32c_elf_howto_table): Use it for R_M32C_24.
	(m32c_elf_relocate_section): Handle R_M32C_24 specially.
This commit is contained in:
DJ Delorie 2015-01-22 17:30:58 -05:00
parent 717cf30c82
commit 055173ca8d
2 changed files with 77 additions and 4 deletions
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6
bfd/ChangeLog
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@ -1,3 +1,9 @@
2015-01-22 DJ Delorie <dj@redhat.com>
* elf32-m32c.c (m32c_apply_reloc_24): New.
(m32c_elf_howto_table): Use it for R_M32C_24.
(m32c_elf_relocate_section): Handle R_M32C_24 specially.
2015-01-22 Nick Clifton <nickc@redhat.com>
PR binutils/17512

75
bfd/elf32-m32c.c
View File

@ -40,6 +40,8 @@ void dump_symtab (bfd *, void *, void *);
#endif
static bfd_boolean m32c_elf_relax_section
(bfd *abfd, asection *sec, struct bfd_link_info *link_info, bfd_boolean *again);
static bfd_reloc_status_type m32c_apply_reloc_24
(bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
static reloc_howto_type m32c_elf_howto_table [] =
@ -83,7 +85,7 @@ static reloc_howto_type m32c_elf_howto_table [] =
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
m32c_apply_reloc_24, /* special_function */
"R_M32C_24", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
@ -307,6 +309,48 @@ m32c_info_to_howto_rela
/* Apply R_M32C_24 relocations. We have to do this because it's not a
power-of-two size, and the generic code may think it overruns the
section if it's right at the end.
Must return something other than bfd_reloc_continue to avoid the
above problem. Typical return values include bfd_reloc_ok or
bfd_reloc_overflow.
*/
static bfd_reloc_status_type m32c_apply_reloc_24 (bfd *abfd ATTRIBUTE_UNUSED,
arelent *reloc_entry,
asymbol *symbol,
void *vdata_start ATTRIBUTE_UNUSED,
asection *input_section,
bfd *ibfd ATTRIBUTE_UNUSED,
char **error_msg ATTRIBUTE_UNUSED)
{
bfd_vma relocation;
bfd_reloc_status_type s;
s = bfd_elf_generic_reloc (abfd, reloc_entry, symbol,
vdata_start,
input_section, ibfd, error_msg);
if (s != bfd_reloc_continue)
return s;
/* Get symbol value. (Common symbols are special.) */
if (bfd_is_com_section (symbol->section))
relocation = 0;
else
relocation = symbol->value;
relocation += symbol->section->output_offset;
/* Add in supplied addend. */
relocation += reloc_entry->addend;
reloc_entry->addend = relocation;
reloc_entry->address += input_section->output_offset;
return bfd_reloc_ok;
}
/* Relocate an M32C 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],
@ -535,9 +579,32 @@ m32c_elf_relocate_section
printf ("\n");
}
#endif
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
contents, rel->r_offset, relocation,
rel->r_addend);
switch (ELF32_R_TYPE(rel->r_info))
{
case R_M32C_24:
/* Like m32c_apply_reloc_24, we must handle this one separately. */
relocation += rel->r_addend;
/* Sanity check the address. */
if (rel->r_offset + 3
> bfd_get_section_limit_octets (input_bfd, input_section))
r = bfd_reloc_outofrange;
else
{
bfd_put_8 (input_bfd, relocation & 0xff, contents + rel->r_offset);
bfd_put_8 (input_bfd, (relocation >> 8) & 0xff, contents + rel->r_offset + 1);
bfd_put_8 (input_bfd, (relocation >> 16) & 0xff, contents + rel->r_offset + 2);
r = bfd_reloc_ok;
}
break;
default:
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
contents, rel->r_offset, relocation,
rel->r_addend);
break;
}
if (r != bfd_reloc_ok)
{