/* AVR-specific support for 32-bit ELF
- Copyright (C) 1999-2015 Free Software Foundation, Inc.
+ Copyright (C) 1999-2016 Free Software Foundation, Inc.
Contributed by Denis Chertykov <denisc@overta.ru>
This file is part of BFD, the Binary File Descriptor library.
/* Assorted information used by elf32_avr_size_stubs. */
unsigned int bfd_count;
- int top_index;
+ unsigned int top_index;
asection ** input_list;
Elf_Internal_Sym ** all_local_syms;
FALSE, /* partial_inplace */
0xffffff, /* src_mask */
0xffffff, /* dst_mask */
- FALSE) /* pcrel_offset */
+ FALSE), /* pcrel_offset */
+
+ /* A 32 bit PC relative relocation. */
+ HOWTO (R_AVR_32_PCREL, /* type */
+ 0, /* rightshift */
+ 2, /* size (0 = byte, 1 = short, 2 = long) */
+ 32, /* bitsize */
+ TRUE, /* pc_relative */
+ 0, /* bitpos */
+ complain_overflow_bitfield, /* complain_on_overflow */
+ bfd_elf_generic_reloc, /* special_function */
+ "R_AVR_32_PCREL", /* name */
+ FALSE, /* partial_inplace */
+ 0xffffffff, /* src_mask */
+ 0xffffffff, /* dst_mask */
+ TRUE), /* pcrel_offset */
};
/* Map BFD reloc types to AVR ELF reloc types. */
{ BFD_RELOC_AVR_DIFF32, R_AVR_DIFF32 },
{ BFD_RELOC_AVR_LDS_STS_16, R_AVR_LDS_STS_16},
{ BFD_RELOC_AVR_PORT6, R_AVR_PORT6},
- { BFD_RELOC_AVR_PORT5, R_AVR_PORT5}
+ { BFD_RELOC_AVR_PORT5, R_AVR_PORT5},
+ { BFD_RELOC_32_PCREL, R_AVR_32_PCREL}
};
/* Meant to be filled one day with the wrap around address for the
RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
rel, 1, relend, howto, 0, contents);
- if (info->relocatable)
+ if (bfd_link_relocatable (info))
continue;
r = avr_final_link_relocate (howto, input_bfd, input_section,
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);
+ (*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->callbacks->undefined_symbol)
(info, name, input_bfd, input_section, rel->r_offset, TRUE);
break;
}
if (msg)
- r = info->callbacks->warning
- (info, msg, name, input_bfd, input_section, rel->r_offset);
-
- if (! r)
- return FALSE;
+ (*info->callbacks->warning) (info, msg, name, input_bfd,
+ input_section, rel->r_offset);
}
}
/* Delete some bytes from a section while changing the size of an instruction.
The parameter "addr" denotes the section-relative offset pointing just
behind the shrinked instruction. "addr+count" point at the first
- byte just behind the original unshrinked instruction. */
+ byte just behind the original unshrinked instruction. If delete_shrinks_insn
+ is FALSE, we are deleting redundant padding bytes from relax_info prop
+ record handling. In that case, addr is section-relative offset of start
+ of padding, and count is the number of padding bytes to delete. */
static bfd_boolean
elf32_avr_relax_delete_bytes (bfd *abfd,
asection *sec,
bfd_vma addr,
- int count)
+ int count,
+ bfd_boolean delete_shrinks_insn)
{
Elf_Internal_Shdr *symtab_hdr;
unsigned int sec_shndx;
Elf_Internal_Rela *irel, *irelend;
Elf_Internal_Sym *isym;
Elf_Internal_Sym *isymbuf = NULL;
- bfd_vma toaddr;
+ bfd_vma toaddr, reloc_toaddr;
struct elf_link_hash_entry **sym_hashes;
struct elf_link_hash_entry **end_hashes;
unsigned int symcount;
struct avr_relax_info *relax_info;
struct avr_property_record *prop_record = NULL;
+ bfd_boolean did_shrink = FALSE;
+ bfd_boolean did_pad = FALSE;
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
}
}
+ /* We need to look at all relocs with offsets less than toaddr. prop
+ records handling adjusts toaddr downwards to avoid moving syms at the
+ address of the property record, but all relocs with offsets between addr
+ and the current value of toaddr need to have their offsets adjusted.
+ Assume addr = 0, toaddr = 4 and count = 2. After prop records handling,
+ toaddr becomes 2, but relocs with offsets 2 and 3 still need to be
+ adjusted (to 0 and 1 respectively), as the first 2 bytes are now gone.
+ So record the current value of toaddr here, and use it when adjusting
+ reloc offsets. */
+ reloc_toaddr = toaddr;
+
irel = elf_section_data (sec)->relocs;
irelend = irel + sec->reloc_count;
/* Actually delete the bytes. */
if (toaddr - addr - count > 0)
- memmove (contents + addr, contents + addr + count,
- (size_t) (toaddr - addr - count));
+ {
+ memmove (contents + addr, contents + addr + count,
+ (size_t) (toaddr - addr - count));
+ did_shrink = TRUE;
+ }
if (prop_record == NULL)
- sec->size -= count;
+ {
+ sec->size -= count;
+ did_shrink = TRUE;
+ }
else
{
/* Use the property record to fill in the bytes we've opened up. */
prop_record->data.align.preceding_deleted += count;
break;
};
+ /* If toaddr == (addr + count), then we didn't delete anything, yet
+ we fill count bytes backwards from toaddr. This is still ok - we
+ end up overwriting the bytes we would have deleted. We just need
+ to remember we didn't delete anything i.e. don't set did_shrink,
+ so that we don't corrupt reloc offsets or symbol values.*/
memset (contents + toaddr - count, fill, count);
+ did_pad = TRUE;
/* Adjust the TOADDR to avoid moving symbols located at the address
of the property record, which has not moved. */
toaddr -= count;
}
+ if (!did_shrink)
+ return TRUE;
+
/* Adjust all the reloc addresses. */
for (irel = elf_section_data (sec)->relocs; irel < irelend; irel++)
{
/* Get the new reloc address. */
if ((irel->r_offset > addr
- && irel->r_offset < toaddr))
+ && irel->r_offset < reloc_toaddr))
{
if (debug_relax)
printf ("Relocation at address 0x%x needs to be moved.\n"
continue;
shrinked_insn_address = (sec->output_section->vma
- + sec->output_offset + addr - count);
+ + sec->output_offset + addr);
+ if (delete_shrinks_insn)
+ shrinked_insn_address -= count;
irel = elf_section_data (isec)->relocs;
/* PR 12161: Read in the relocs for this section if necessary. */
a symbol or section associated with it. */
if (sym_sec == sec)
{
+ /* If there is an alignment boundary, we only need to
+ adjust addends that end up below the boundary. */
+ bfd_vma shrink_boundary = (reloc_toaddr
+ + sec->output_section->vma
+ + sec->output_offset);
+ bfd_boolean addend_within_shrink_boundary = FALSE;
+
symval += sym_sec->output_section->vma
+ sym_sec->output_offset;
(unsigned int) (symval + irel->r_addend),
(unsigned int) shrinked_insn_address);
+ /* If we padded bytes, then the boundary didn't change,
+ so there's no need to adjust addends pointing at the boundary.
+ If we didn't pad, then we actually shrank the boundary, so
+ addends pointing at the boundary need to be adjusted too. */
+ addend_within_shrink_boundary = did_pad
+ ? ((symval + irel->r_addend) < shrink_boundary)
+ : ((symval + irel->r_addend) <= shrink_boundary);
+
if (symval <= shrinked_insn_address
- && (symval + irel->r_addend) > shrinked_insn_address)
+ && (symval + irel->r_addend) > shrinked_insn_address
+ && addend_within_shrink_boundary)
{
if (elf32_avr_is_diff_reloc (irel))
{
|| !strcmp (sec->name,".jumptables"))
shrinkable = FALSE;
- if (link_info->relocatable)
+ if (bfd_link_relocatable (link_info))
(*link_info->callbacks->einfo)
(_("%P%F: --relax and -r may not be used together\n"));
/* We don't have to do anything for a relocatable link, if
this section does not have relocs, or if this is not a
code section. */
- if (link_info->relocatable
+ if (bfd_link_relocatable (link_info)
|| (sec->flags & SEC_RELOC) == 0
|| sec->reloc_count == 0
|| (sec->flags & SEC_CODE) == 0)
{
/* Delete two bytes of data. */
if (!elf32_avr_relax_delete_bytes (abfd, sec,
- irel->r_offset + 2, 2))
+ irel->r_offset + 2, 2,
+ TRUE))
goto error_return;
/* That will change things, so, we should relax again.
}
}
}
+ /* Fall through. */
default:
{
/* Delete two bytes of data. */
if (!elf32_avr_relax_delete_bytes (abfd, sec,
- irel->r_offset + insn_size, 2))
+ irel->r_offset + insn_size, 2,
+ TRUE))
goto error_return;
/* That will change things, so, we should relax
record->offset -= count;
elf32_avr_relax_delete_bytes (abfd, sec,
addr - count,
- count);
+ count, FALSE);
*again = TRUE;
}
}
if (hsh == NULL)
{
- (*_bfd_error_handler) (_("%B: cannot create stub entry %s"),
- NULL, stub_name);
+ _bfd_error_handler (_("%B: cannot create stub entry %s"),
+ NULL, stub_name);
return NULL;
}
{
bfd *input_bfd;
unsigned int bfd_count;
- int top_id, top_index;
+ unsigned int top_id, top_index;
asection *section;
asection **input_list, **list;
bfd_size_type amt;
}
else if (hh->root.type == bfd_link_hash_undefweak)
{
- if (! info->shared)
+ if (! bfd_link_pic (info))
continue;
}
else if (hh->root.type == bfd_link_hash_undefined)
}
free (contents);
- free (internal_relocs);
+ if (elf_section_data (sec)->relocs != internal_relocs)
+ free (internal_relocs);
return r_list;
load_failed:
- free (internal_relocs);
+ if (elf_section_data (sec)->relocs != internal_relocs)
+ free (internal_relocs);
free (contents);
free (r_list);
return NULL;
projects / deliverable / binutils-gdb.git / blobdiff