mirror/binutils-gdb
2
0
Fork 0
mirror of https://sourceware.org/git/binutils-gdb.git synced 2024-12-03 04:12:10 +08:00
Code Issues Packages Projects Releases Wiki Activity
fcc73fe3a6
binutils-gdb/bfd/elf32-m32c.c
DJ Delorie fd54057a29 [bfd] 
* reloc.c: Remove unused M32C relocs, add BFD_RELOC_M32C_HI8.
	* libbfd.h: Regenerate.
	* bfd-in2.h: Regenerate.

	* elf32-m32c.c (m32c_elf_howto_table): Add R_M32C_8, R_M32C_LO16,
	R_M32C_HI8, R_M32C_HI16.
	(m32c_reloc_map): Likewise.
	(m32c_elf_relocate_section): Add R_M32C_HI8 and R_M32C_HI16.

[cpu]
	* m32c.opc (parse_unsigned8): Add %dsp8().
	(parse_signed8): Add %hi8().
	(parse_unsigned16): Add %dsp16().
	(parse_signed16): Add %lo16() and %hi16().
	(parse_lab_5_3): Make valuep a bfd_vma *.

[gas]
	* config/tc-m32c.c (md_cgen_lookup_reloc): Add 8 bit operands.
	Support %mod() modifiers from opcodes.
	* doc/c-m32c.texi (M32C-Modifiers): New section.

[include/elf]

	* m32c.h: Add R_M32C_8, R_M32C_LO16, R_M32C_HI8, and R_M32C_HI16.

[opcodes]
	* m32c-asm.c Regenerate.
	* m32c-dis.c Regenerate.
2005-07-26 03:21:53 +00:00

1732 lines
46 KiB
C
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/* M16C/M32C specific support for 32-bit ELF.
Copyright (C) 2005
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
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/m32c.h"
#include "libiberty.h"
/* Forward declarations. */
static reloc_howto_type * m32c_reloc_type_lookup
(bfd *, bfd_reloc_code_real_type);
static void m32c_info_to_howto_rela
(bfd *, arelent *, Elf_Internal_Rela *);
static bfd_boolean m32c_elf_relocate_section
(bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **);
static bfd_boolean m32c_elf_gc_sweep_hook
(bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
static asection * m32c_elf_gc_mark_hook
(asection *, struct bfd_link_info *, Elf_Internal_Rela *, struct elf_link_hash_entry *, Elf_Internal_Sym *);
static bfd_boolean m32c_elf_check_relocs
(bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
static bfd_boolean m32c_elf_relax_delete_bytes (bfd *, asection *, bfd_vma, int);
#ifdef DEBUG
static char * m32c_get_reloc (long reloc);
#endif
static bfd_boolean m32c_elf_relax_section
(bfd *abfd, asection *sec, struct bfd_link_info *link_info, bfd_boolean *again);
static reloc_howto_type m32c_elf_howto_table [] =
{
/* This reloc does nothing. */
HOWTO (R_M32C_NONE, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32C_NONE", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_M32C_16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32C_16", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
0x0000ffff, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_M32C_24, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
24, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32C_24", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
0x00ffffff, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_M32C_32, /* type */
0, /* rightshift */
2, /* size (0 = byte, 1 = short, 2 = long) */
32, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_bitfield, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32C_32", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
0xffffffff, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_M32C_8_PCREL, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
8, /* bitsize */
TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32C_8_PCREL", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
0x000000ff, /* dst_mask */
TRUE), /* pcrel_offset */
HOWTO (R_M32C_16_PCREL, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
TRUE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32C_16_PCREL", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
TRUE), /* pcrel_offset */
HOWTO (R_M32C_8, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
8, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_unsigned, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32C_8", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
0x000000ff, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_M32C_LO16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32C_LO16", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
0x0000ffff, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_M32C_HI8, /* type */
0, /* rightshift */
0, /* size (0 = byte, 1 = short, 2 = long) */
8, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32C_HI8", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
0x000000ff, /* dst_mask */
FALSE), /* pcrel_offset */
HOWTO (R_M32C_HI16, /* type */
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32C_HI16", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
0x0000ffff, /* dst_mask */
FALSE), /* pcrel_offset */
};
/* Map BFD reloc types to M32C ELF reloc types. */
struct m32c_reloc_map
{
bfd_reloc_code_real_type bfd_reloc_val;
unsigned int m32c_reloc_val;
};
static const struct m32c_reloc_map m32c_reloc_map [] =
{
{ BFD_RELOC_NONE, R_M32C_NONE },
{ BFD_RELOC_16, R_M32C_16 },
{ BFD_RELOC_24, R_M32C_24 },
{ BFD_RELOC_32, R_M32C_32 },
{ BFD_RELOC_8_PCREL, R_M32C_8_PCREL },
{ BFD_RELOC_16_PCREL, R_M32C_16_PCREL },
{ BFD_RELOC_8, R_M32C_8 },
{ BFD_RELOC_LO16, R_M32C_LO16 },
{ BFD_RELOC_HI16, R_M32C_HI16 },
{ BFD_RELOC_M32C_HI8, R_M32C_HI8 }
};
static reloc_howto_type *
m32c_reloc_type_lookup
(bfd * abfd ATTRIBUTE_UNUSED,
bfd_reloc_code_real_type code)
{
unsigned int i;
for (i = ARRAY_SIZE (m32c_reloc_map); --i;)
if (m32c_reloc_map [i].bfd_reloc_val == code)
return & m32c_elf_howto_table [m32c_reloc_map[i].m32c_reloc_val];
return NULL;
}
/* Set the howto pointer for an M32C ELF reloc. */
static void
m32c_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_M32C_max);
cache_ptr->howto = & m32c_elf_howto_table [r_type];
}
/* 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],
if only to serve as a learning tool.
The RELOCATE_SECTION function is called by the new ELF backend linker
to handle the relocations for a section.
The relocs are always passed as Rela structures; if the section
actually uses Rel structures, the r_addend field will always be
zero.
This function is responsible for adjusting the section contents as
necessary, and (if using Rela relocs and generating a relocatable
output file) adjusting the reloc addend as necessary.
This function does not have to worry about setting the reloc
address or the reloc symbol index.
LOCAL_SYMS is a pointer to the swapped in local symbols.
LOCAL_SECTIONS is an array giving the section in the input file
corresponding to the st_shndx field of each local symbol.
The global hash table entry for the global symbols can be found
via elf_sym_hashes (input_bfd).
When generating relocatable output, this function must handle
STB_LOCAL/STT_SECTION symbols specially. The output symbol is
going to be the section symbol corresponding to the output
section, which means that the addend must be adjusted
accordingly. */
static bfd_boolean
m32c_elf_relocate_section
(bfd * output_bfd ATTRIBUTE_UNUSED,
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;
bfd *dynobj;
asection *splt;
symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (input_bfd);
relend = relocs + input_section->reloc_count;
dynobj = elf_hash_table (info)->dynobj;
splt = NULL;
if (dynobj != NULL)
splt = bfd_get_section_by_name (dynobj, ".plt");
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 (info->relocatable)
{
/* This is a relocatable link. We don't have to change
anything, unless the reloc is against a section symbol,
in which case we have to adjust according to where the
section symbol winds up in the output section. */
if (r_symndx < symtab_hdr->sh_info)
{
sym = local_syms + r_symndx;
if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
{
sec = local_sections [r_symndx];
rel->r_addend += sec->output_offset + sym->st_value;
}
}
continue;
}
/* This is a final link. */
howto = m32c_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 = (sec->output_section->vma
+ sec->output_offset
+ sym->st_value);
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
{
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;
name = h->root.root.string;
if (h->root.type == bfd_link_hash_defined
|| h->root.type == bfd_link_hash_defweak)
{
sec = h->root.u.def.section;
relocation = (h->root.u.def.value
+ sec->output_section->vma
+ sec->output_offset);
}
else if (h->root.type == bfd_link_hash_undefweak)
{
relocation = 0;
}
else
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd,
input_section, rel->r_offset, TRUE)))
return FALSE;
relocation = 0;
}
}
switch (ELF32_R_TYPE (rel->r_info))
{
case R_M32C_16:
{
bfd_vma *plt_offset;
if (h != NULL)
plt_offset = &h->plt.offset;
else
plt_offset = elf_local_got_offsets (input_bfd) + r_symndx;
/* printf("%s: rel %x plt %d\n", h ? h->root.root.string : "(none)",
relocation, *plt_offset);*/
if (relocation <= 0xffff)
{
/* If the symbol is in range for a 16-bit address, we should
have deallocated the plt entry in relax_section. */
BFD_ASSERT (*plt_offset == (bfd_vma) -1);
}
else
{
/* If the symbol is out of range for a 16-bit address,
we must have allocated a plt entry. */
BFD_ASSERT (*plt_offset != (bfd_vma) -1);
/* If this is the first time we've processed this symbol,
fill in the plt entry with the correct symbol address. */
if ((*plt_offset & 1) == 0)
{
unsigned int x;
x = 0x000000fc; /* jmpf */
x |= (relocation << 8) & 0xffffff00;
bfd_put_32 (input_bfd, x, splt->contents + *plt_offset);
*plt_offset |= 1;
}
relocation = (splt->output_section->vma
+ splt->output_offset
+ (*plt_offset & -2));
}
}
break;
case R_M32C_HI8:
case R_M32C_HI16:
relocation >>= 16;
break;
}
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
contents, rel->r_offset, relocation,
rel->r_addend);
if (r != bfd_reloc_ok)
{
const char * msg = (const char *) 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;
}
/* Return the section that should be marked against GC for a given
relocation. */
static asection *
m32c_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)
{
switch (ELF32_R_TYPE (rel->r_info))
{
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;
}
}
}
else
{
if (!(elf_bad_symtab (sec->owner)
&& 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 (sec->owner, sym->st_shndx);
}
}
return NULL;
}
/* Update the got entry reference counts for the section being removed. */
static bfd_boolean
m32c_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;
}
/* We support 16-bit pointers to code above 64k by generating a thunk
below 64k containing a JMP instruction to the final address. */
static bfd_boolean
m32c_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;
struct elf_link_hash_entry ** sym_hashes_end;
const Elf_Internal_Rela * rel;
const Elf_Internal_Rela * rel_end;
bfd_vma *local_plt_offsets;
asection *splt;
bfd *dynobj;
if (info->relocatable)
return TRUE;
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
sym_hashes = elf_sym_hashes (abfd);
local_plt_offsets = elf_local_got_offsets (abfd);
splt = NULL;
dynobj = elf_hash_table(info)->dynobj;
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;
bfd_vma *offset;
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))
{
/* This relocation describes a 16-bit pointer to a function.
We may need to allocate a thunk in low memory; reserve memory
for it now. */
case R_M32C_16:
if (dynobj == NULL)
elf_hash_table (info)->dynobj = dynobj = abfd;
if (splt == NULL)
{
splt = bfd_get_section_by_name (dynobj, ".plt");
if (splt == NULL)
{
splt = bfd_make_section (dynobj, ".plt");
if (splt == NULL
|| ! bfd_set_section_flags (dynobj, splt,
(SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
| SEC_IN_MEMORY
| SEC_LINKER_CREATED
| SEC_READONLY
| SEC_CODE))
|| ! bfd_set_section_alignment (dynobj, splt, 1))
return FALSE;
}
}
if (h != NULL)
offset = &h->plt.offset;
else
{
if (local_plt_offsets == NULL)
{
size_t size;
unsigned int i;
size = symtab_hdr->sh_info * sizeof (bfd_vma);
local_plt_offsets = (bfd_vma *) bfd_alloc (abfd, size);
if (local_plt_offsets == NULL)
return FALSE;
elf_local_got_offsets (abfd) = local_plt_offsets;
for (i = 0; i < symtab_hdr->sh_info; i++)
local_plt_offsets[i] = (bfd_vma) -1;
}
offset = &local_plt_offsets[r_symndx];
}
if (*offset == (bfd_vma) -1)
{
*offset = splt->size;
splt->size += 4;
}
break;
}
}
return TRUE;
}
/* This must exist if dynobj is ever set. */
static bfd_boolean
m32c_elf_finish_dynamic_sections (bfd *abfd ATTRIBUTE_UNUSED,
struct bfd_link_info *info)
{
bfd *dynobj;
asection *splt;
/* As an extra sanity check, verify that all plt entries have
been filled in. */
if ((dynobj = elf_hash_table (info)->dynobj) != NULL
&& (splt = bfd_get_section_by_name (dynobj, ".plt")) != NULL)
{
bfd_byte *contents = splt->contents;
unsigned int i, size = splt->size;
for (i = 0; i < size; i += 4)
{
unsigned int x = bfd_get_32 (dynobj, contents + i);
BFD_ASSERT (x != 0);
}
}
return TRUE;
}
static bfd_boolean
m32c_elf_always_size_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
struct bfd_link_info *info)
{
bfd *dynobj;
asection *splt;
if (info->relocatable)
return TRUE;
dynobj = elf_hash_table (info)->dynobj;
if (dynobj == NULL)
return TRUE;
splt = bfd_get_section_by_name (dynobj, ".plt");
BFD_ASSERT (splt != NULL);
splt->contents = (bfd_byte *) bfd_zalloc (dynobj, splt->size);
if (splt->contents == NULL)
return FALSE;
return TRUE;
}
/* Function to set the ELF flag bits. */
static bfd_boolean
m32c_elf_set_private_flags (bfd *abfd, flagword flags)
{
elf_elfheader (abfd)->e_flags = flags;
elf_flags_init (abfd) = TRUE;
return TRUE;
}
/* Merge backend specific data from an object file to the output
object file when linking. */
static bfd_boolean
m32c_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
{
flagword old_flags, old_partial;
flagword new_flags, new_partial;
bfd_boolean error = FALSE;
char new_opt[80];
char old_opt[80];
new_opt[0] = old_opt[0] = '\0';
new_flags = elf_elfheader (ibfd)->e_flags;
old_flags = elf_elfheader (obfd)->e_flags;
#ifdef DEBUG
(*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no",
bfd_get_filename (ibfd));
#endif
if (!elf_flags_init (obfd))
{
/* First call, no flags set. */
elf_flags_init (obfd) = TRUE;
elf_elfheader (obfd)->e_flags = new_flags;
}
else if (new_flags == old_flags)
/* Compatible flags are ok. */
;
else /* Possibly incompatible flags. */
{
/* Warn if different cpu is used (allow a specific cpu to override
the generic cpu). */
new_partial = (new_flags & EF_M32C_CPU_MASK);
old_partial = (old_flags & EF_M32C_CPU_MASK);
if (new_partial == old_partial)
;
else
{
switch (new_partial)
{
default: strcat (new_opt, " -m16c"); break;
case EF_M32C_CPU_M16C: strcat (new_opt, " -m16c"); break;
case EF_M32C_CPU_M32C: strcat (new_opt, " -m32c"); break;
}
switch (old_partial)
{
default: strcat (old_opt, " -m16c"); break;
case EF_M32C_CPU_M16C: strcat (old_opt, " -m16c"); break;
case EF_M32C_CPU_M32C: strcat (old_opt, " -m32c"); break;
}
}
/* Print out any mismatches from above. */
if (new_opt[0])
{
error = TRUE;
(*_bfd_error_handler)
(_("%s: compiled with %s and linked with modules compiled with %s"),
bfd_get_filename (ibfd), new_opt, old_opt);
}
new_flags &= ~ EF_M32C_ALL_FLAGS;
old_flags &= ~ EF_M32C_ALL_FLAGS;
/* Warn about any other mismatches. */
if (new_flags != old_flags)
{
error = TRUE;
(*_bfd_error_handler)
(_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
}
}
if (error)
bfd_set_error (bfd_error_bad_value);
return !error;
}
static bfd_boolean
m32c_elf_print_private_bfd_data (bfd *abfd, PTR ptr)
{
FILE *file = (FILE *) ptr;
flagword flags;
BFD_ASSERT (abfd != NULL && ptr != NULL);
/* Print normal ELF private data. */
_bfd_elf_print_private_bfd_data (abfd, ptr);
flags = elf_elfheader (abfd)->e_flags;
fprintf (file, _("private flags = 0x%lx:"), (long)flags);
switch (flags & EF_M32C_CPU_MASK)
{
default: break;
case EF_M32C_CPU_M16C: fprintf (file, " -m16c"); break;
case EF_M32C_CPU_M32C: fprintf (file, " -m32c"); break;
}
fputc ('\n', file);
return TRUE;
}
/* Return the MACH for an e_flags value. */
static int
elf32_m32c_machine (bfd *abfd)
{
switch (elf_elfheader (abfd)->e_flags & EF_M32C_CPU_MASK)
{
case EF_M32C_CPU_M16C: return bfd_mach_m16c;
case EF_M32C_CPU_M32C: return bfd_mach_m32c;
}
return bfd_mach_m16c;
}
static bfd_boolean
m32c_elf_object_p (bfd *abfd)
{
bfd_default_set_arch_mach (abfd, bfd_arch_m32c,
elf32_m32c_machine (abfd));
return TRUE;
}
#ifdef DEBUG
static void
dump_symtab (bfd * abfd, void *internal_syms, void *external_syms)
{
size_t locsymcount;
Elf_Internal_Sym *isymbuf;
Elf_Internal_Sym *isymend;
Elf_Internal_Sym *isym;
Elf_Internal_Shdr *symtab_hdr;
bfd_boolean free_internal = 0, free_external = 0;
char * st_info_str;
char * st_info_stb_str;
char * st_other_str;
char * st_shndx_str;
if (! internal_syms)
{
internal_syms = bfd_malloc (1000);
free_internal = 1;
}
if (! external_syms)
{
external_syms = bfd_malloc (1000);
free_external = 1;
}
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
locsymcount = symtab_hdr->sh_size / get_elf_backend_data(abfd)->s->sizeof_sym;
if (free_internal)
isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
symtab_hdr->sh_info, 0,
internal_syms, external_syms, NULL);
else
isymbuf = internal_syms;
isymend = isymbuf + locsymcount;
for (isym = isymbuf ; isym < isymend ; isym++)
{
switch (ELF_ST_TYPE (isym->st_info))
{
case STT_FUNC: st_info_str = "STT_FUNC";
case STT_SECTION: st_info_str = "STT_SECTION";
case STT_SRELC: st_info_str = "STT_SRELC";
case STT_FILE: st_info_str = "STT_FILE";
case STT_OBJECT: st_info_str = "STT_OBJECT";
case STT_TLS: st_info_str = "STT_TLS";
default: st_info_str = "";
}
switch (ELF_ST_BIND (isym->st_info))
{
case STB_LOCAL: st_info_stb_str = "STB_LOCAL";
case STB_GLOBAL: st_info_stb_str = "STB_GLOBAL";
default: st_info_stb_str = "";
}
switch (ELF_ST_VISIBILITY (isym->st_other))
{
case STV_DEFAULT: st_other_str = "STV_DEFAULT";
case STV_INTERNAL: st_other_str = "STV_INTERNAL";
case STV_PROTECTED: st_other_str = "STV_PROTECTED";
default: st_other_str = "";
}
switch (isym->st_shndx)
{
case SHN_ABS: st_shndx_str = "SHN_ABS";
case SHN_COMMON: st_shndx_str = "SHN_COMMON";
case SHN_UNDEF: st_shndx_str = "SHN_UNDEF";
default: st_shndx_str = "";
}
printf ("isym = %p st_value = %lx st_size = %lx st_name = (%lu) %s "
"st_info = (%d) %s %s st_other = (%d) %s st_shndx = (%d) %s\n",
isym,
(unsigned long) isym->st_value,
(unsigned long) isym->st_size,
isym->st_name,
bfd_elf_string_from_elf_section (abfd, symtab_hdr->sh_link,
isym->st_name),
isym->st_info, st_info_str, st_info_stb_str,
isym->st_other, st_other_str,
isym->st_shndx, st_shndx_str);
}
if (free_internal)
free (internal_syms);
if (free_external)
free (external_syms);
}
static char *
m32c_get_reloc (long reloc)
{
if (0 <= reloc && reloc < R_M32C_max)
return m32c_elf_howto_table[reloc].name;
else
return "";
}
#endif /* DEBUG */
/* Handle relaxing. */
/* A subroutine of m32c_elf_relax_section. If the global symbol H
is within the low 64k, remove any entry for it in the plt. */
struct relax_plt_data
{
asection *splt;
bfd_boolean *again;
};
static bfd_boolean
m32c_relax_plt_check (struct elf_link_hash_entry *h,
PTR xdata)
{
struct relax_plt_data *data = (struct relax_plt_data *) xdata;
if (h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
if (h->plt.offset != (bfd_vma) -1)
{
bfd_vma address;
if (h->root.type == bfd_link_hash_undefined
|| h->root.type == bfd_link_hash_undefweak)
address = 0;
else
address = (h->root.u.def.section->output_section->vma
+ h->root.u.def.section->output_offset
+ h->root.u.def.value);
if (address <= 0xffff)
{
h->plt.offset = -1;
data->splt->size -= 4;
*data->again = TRUE;
}
}
return TRUE;
}
/* A subroutine of m32c_elf_relax_section. If the global symbol H
previously had a plt entry, give it a new entry offset. */
static bfd_boolean
m32c_relax_plt_realloc (struct elf_link_hash_entry *h,
PTR xdata)
{
bfd_vma *entry = (bfd_vma *) xdata;
if (h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
if (h->plt.offset != (bfd_vma) -1)
{
h->plt.offset = *entry;
*entry += 4;
}
return TRUE;
}
static bfd_boolean
m32c_elf_relax_plt_section (bfd *dynobj,
asection *splt,
struct bfd_link_info *info,
bfd_boolean *again)
{
struct relax_plt_data relax_plt_data;
bfd *ibfd;
/* Assume nothing changes. */
*again = FALSE;
if (info->relocatable)
return TRUE;
/* We only relax the .plt section at the moment. */
if (dynobj != elf_hash_table (info)->dynobj
|| strcmp (splt->name, ".plt") != 0)
return TRUE;
/* Quick check for an empty plt. */
if (splt->size == 0)
return TRUE;
/* Map across all global symbols; see which ones happen to
fall in the low 64k. */
relax_plt_data.splt = splt;
relax_plt_data.again = again;
elf_link_hash_traverse (elf_hash_table (info), m32c_relax_plt_check,
&relax_plt_data);
/* Likewise for local symbols, though that's somewhat less convenient
as we have to walk the list of input bfds and swap in symbol data. */
for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
{
bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
Elf_Internal_Shdr *symtab_hdr;
Elf_Internal_Sym *isymbuf = NULL;
unsigned int idx;
if (! local_plt_offsets)
continue;
symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
if (symtab_hdr->sh_info != 0)
{
isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
if (isymbuf == NULL)
isymbuf = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
symtab_hdr->sh_info, 0,
NULL, NULL, NULL);
if (isymbuf == NULL)
return FALSE;
}
for (idx = 0; idx < symtab_hdr->sh_info; ++idx)
{
Elf_Internal_Sym *isym;
asection *tsec;
bfd_vma address;
if (local_plt_offsets[idx] == (bfd_vma) -1)
continue;
isym = &isymbuf[idx];
if (isym->st_shndx == SHN_UNDEF)
continue;
else if (isym->st_shndx == SHN_ABS)
tsec = bfd_abs_section_ptr;
else if (isym->st_shndx == SHN_COMMON)
tsec = bfd_com_section_ptr;
else
tsec = bfd_section_from_elf_index (ibfd, isym->st_shndx);
address = (tsec->output_section->vma
+ tsec->output_offset
+ isym->st_value);
if (address <= 0xffff)
{
local_plt_offsets[idx] = -1;
splt->size -= 4;
*again = TRUE;
}
}
if (isymbuf != NULL
&& symtab_hdr->contents != (unsigned char *) isymbuf)
{
if (! info->keep_memory)
free (isymbuf);
else
{
/* Cache the symbols for elf_link_input_bfd. */
symtab_hdr->contents = (unsigned char *) isymbuf;
}
}
}
/* If we changed anything, walk the symbols again to reallocate
.plt entry addresses. */
if (*again && splt->size > 0)
{
bfd_vma entry = 0;
elf_link_hash_traverse (elf_hash_table (info),
m32c_relax_plt_realloc, &entry);
for (ibfd = info->input_bfds; ibfd ; ibfd = ibfd->link_next)
{
bfd_vma *local_plt_offsets = elf_local_got_offsets (ibfd);
unsigned int nlocals = elf_tdata (ibfd)->symtab_hdr.sh_info;
unsigned int idx;
if (! local_plt_offsets)
continue;
for (idx = 0; idx < nlocals; ++idx)
if (local_plt_offsets[idx] != (bfd_vma) -1)
{
local_plt_offsets[idx] = entry;
entry += 4;
}
}
}
return TRUE;
}
struct relax_reloc_s
{
int machine;
int opcode_mask;
bfd_vma opcode; /* original opcode or insn part */
int relax_backward; /* lbound */
int relax_forward; /* hbound */
int value_shift;
int mask;
int new_opcode; /* new opcode */
int old_reloc; /* old relocation */
int new_reloc; /* new relocation */
int use_pcrel;
int delete_n; /* # bytes differ between original and new */
};
static struct relax_reloc_s relax_reloc [] =
{
#if 0
{
bfd_mach_m16c,
0xff,
0xfc, /* jmp.a */
-32768,
32767,
2,
0xffffff00,
0xf4, /* jmp.w */
R_M32C_8_ELABEL24,
R_M32C_8_PCREL16,
1,
1,
},
{
bfd_mach_m32c,
0xff,
0xcc, /* jmp.a */
-32768,
32767,
2,
0xffffff00,
0xce, /* jmp.w */
R_M32C_8_ELABEL24,
R_M32C_8_PCREL16,
1,
1,
},
{
bfd_mach_m32c,
0xff,
0xcd, /* jsr.a */
-32768,
32767,
2,
0xffffff00,
0xcf, /* jsr.w */
R_M32C_8_ELABEL24,
R_M32C_8_PCREL16,
1,
1,
},
{
bfd_mach_m16c,
0xff,
0xf4, /* jmp.w */
-128,
127,
2,
0xffffff00,
0xfe, /* jmp.b */
R_M32C_8_PCREL16,
R_M32C_8_PCREL8,
1,
1,
},
{
bfd_mach_m32c,
0xff,
0xce, /* jmp.w */
-128,
127,
2,
0xffffff00,
0xbb, /* jmp.b */
R_M32C_8_PCREL16,
R_M32C_8_PCREL8,
1,
1,
},
{
bfd_mach_m32c,
0xc0f6,
0x8096, /* dest */
0,
0xffff,
3,
0xffff3fff,
0xc000, /* abs16 */
R_M32C_24_ABS24,
R_M32C_24_ABS16,
0,
1,
},
{
bfd_mach_m32c,
0xc0f6,
0x80a6, /* dest */
0,
0xffff,
4,
0xffff3fff,
0xc000, /* abs16 */
R_M32C_32_ABS24,
R_M32C_32_ABS16,
0,
1,
},
{
bfd_mach_m32c,
0xc0f6,
0x80b6, /* dest */
0,
0xffff,
5,
0xffff3fff,
0xc000, /* abs16 */
R_M32C_40_ABS24,
R_M32C_40_ABS16,
0,
1,
},
{
bfd_mach_m32c,
0x30f0,
0x20b0, /* src */
0,
0xffff,
2,
0xffffcfff,
0x3000, /* abs16 */
R_M32C_16_ABS24,
R_M32C_16_ABS16,
0,
1,
},
{
bfd_mach_m32c,
0xc086,
0x8086, /* dest */
0,
0xffff,
2,
0xffff3fff,
0xc000, /* abs16 */
R_M32C_16_ABS24,
R_M32C_16_ABS16,
0,
1,
},
#endif
{
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
}
};
static bfd_boolean
m32c_elf_relax_section
(bfd * abfd,
asection * sec,
struct bfd_link_info * link_info,
bfd_boolean * again)
{
Elf_Internal_Shdr *symtab_hdr;
Elf_Internal_Shdr *shndx_hdr;
Elf_Internal_Rela *internal_relocs;
Elf_Internal_Rela *free_relocs = NULL;
Elf_Internal_Rela *irel, *irelend;
bfd_byte * contents = NULL;
bfd_byte * free_contents = NULL;
Elf32_External_Sym *extsyms = NULL;
Elf32_External_Sym *free_extsyms = NULL;
Elf_External_Sym_Shndx *shndx_buf = NULL;
int machine;
if (abfd == elf_hash_table (link_info)->dynobj
&& strcmp (sec->name, ".plt") == 0)
return m32c_elf_relax_plt_section (abfd, sec, link_info, again);
/* Assume nothing changes. */
*again = FALSE;
machine = elf32_m32c_machine (abfd);
/* 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
|| (sec->flags & SEC_RELOC) == 0
|| sec->reloc_count == 0
|| (sec->flags & SEC_CODE) == 0)
return TRUE;
/* Relaxing doesn't quite work right yet. */
return TRUE;
symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
shndx_hdr = &elf_tdata (abfd)->symtab_shndx_hdr;
/* Get a copy of the native relocations. */
internal_relocs = (_bfd_elf_link_read_relocs
(abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
link_info->keep_memory));
if (internal_relocs == NULL)
goto error_return;
if (! link_info->keep_memory)
free_relocs = internal_relocs;
/* Walk through them looking for relaxing opportunities. */
irelend = internal_relocs + sec->reloc_count;
for (irel = internal_relocs; irel < irelend; irel++)
{
bfd_vma symval;
bfd_vma insn;
bfd_vma pc;
bfd_signed_vma pcrel_value;
bfd_vma addend;
int to_delete;
int i;
/* Get the section contents. */
if (contents == NULL)
{
if (elf_section_data (sec)->this_hdr.contents != NULL)
contents = elf_section_data (sec)->this_hdr.contents;
/* Go get them off disk. */
else if (!bfd_malloc_and_get_section (abfd, sec, &contents))
goto error_return;
}
/* Read this BFD's symbols if we haven't done so already. */
if (extsyms == NULL)
{
/* Get cached copy if it exists. */
if (symtab_hdr->contents != NULL)
extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
else
{
bfd_size_type amt = symtab_hdr->sh_size;
/* Go get them off disk. */
extsyms = (Elf32_External_Sym *) bfd_malloc (amt);
if (extsyms == NULL)
goto error_return;
free_extsyms = extsyms;
if (bfd_seek (abfd, symtab_hdr->sh_offset, SEEK_SET) != 0
|| bfd_bread (extsyms, amt, abfd) != amt)
goto error_return;
symtab_hdr->contents = (bfd_byte *) extsyms;
}
if (shndx_hdr->sh_size != 0)
{
bfd_size_type amt;
amt = symtab_hdr->sh_info;
amt *= sizeof (Elf_External_Sym_Shndx);
shndx_buf = (Elf_External_Sym_Shndx *) bfd_malloc (amt);
if (shndx_buf == NULL)
goto error_return;
if (bfd_seek (abfd, shndx_hdr->sh_offset, SEEK_SET) != 0
|| bfd_bread ((PTR) shndx_buf, amt, abfd) != amt)
goto error_return;
shndx_hdr->contents = (bfd_byte *) shndx_buf;
}
}
/* Get the value of the symbol referred to by the reloc. */
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
{
/* A local symbol. */
Elf32_External_Sym *esym;
Elf_External_Sym_Shndx *shndx;
Elf_Internal_Sym isym;
esym = extsyms + ELF32_R_SYM (irel->r_info);
shndx = shndx_buf + (shndx_buf ? ELF32_R_SYM (irel->r_info) : 0);
bfd_elf32_swap_symbol_in (abfd, esym, shndx, &isym);
symval = (isym.st_value
+ sec->output_section->vma
+ sec->output_offset);
}
else
{
unsigned long indx;
struct elf_link_hash_entry *h;
/* An external symbol. */
indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
h = elf_sym_hashes (abfd)[indx];
BFD_ASSERT (h != NULL);
if (h->root.type != bfd_link_hash_defined
&& h->root.type != bfd_link_hash_defweak)
/* This appears to be a reference to an undefined
symbol. Just ignore it--it will be caught by the
regular reloc processing. */
continue;
symval = (h->root.u.def.value
+ h->root.u.def.section->output_section->vma
+ h->root.u.def.section->output_offset);
}
/* There will always be room for the relaxed insn, since it is smaller
than the one it would replace. */
BFD_ASSERT (irel->r_offset <= sec->size - 2);
insn = bfd_get_16 (abfd, contents + irel->r_offset + 0);
addend = irel->r_addend;
for (i = 0; relax_reloc[i].machine; i++)
{
#ifdef DEBUG
_bfd_error_handler ("insn %x %d mask %x opcode %x =%x\n",
insn, i, relax_reloc[i].opcode_mask,
relax_reloc[i].opcode,
(insn & relax_reloc[i].opcode_mask) == relax_reloc[i].opcode);
#endif
if (!(machine == relax_reloc[i].machine
&& (insn & relax_reloc[i].opcode_mask) == relax_reloc[i].opcode
&& (relax_reloc[i].old_reloc
== (int) ELF32_R_TYPE(irel->r_info))))
continue;
/* At this point we've confirmed we have a matching insn. Now
ensure the operand is in range. */
if (relax_reloc[i].use_pcrel)
{
pc = sec->output_section->vma + sec->output_offset
+ irel->r_offset;
pcrel_value = symval - pc;
#ifndef USE_REL /* put in for learning purposes */
pcrel_value += addend;
#else
addend = bfd_get_signed_16 (abfd, contents + irel->r_offset + 2);
pcrel_value += addend;
#endif
}
else
pcrel_value = symval;
if (pcrel_value >= relax_reloc[i].relax_backward
&& pcrel_value < relax_reloc[i].relax_forward + 2)
{
/* We can relax to a shorter operand. */
insn = (insn & relax_reloc[i].mask) | relax_reloc[i].new_opcode;
to_delete = relax_reloc[i].delete_n;
/* Rewrite the insn. */
bfd_put_16 (abfd, insn, contents + irel->r_offset);
/* Set the new reloc type. */
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
relax_reloc[i].new_reloc);
irel->r_addend = pcrel_value;
}
else
continue;
#ifdef DEBUG
_bfd_error_handler ("insn %x pc %x index %d mask %x shift %d delete %d\n"
"old reloc %s new reloc %s",
insn, sec->output_section->vma
+ sec->output_offset + irel->r_offset + 2,
i, relax_reloc[i].opcode_mask,
relax_reloc[i].value_shift, to_delete,
m32c_get_reloc (relax_reloc[i].old_reloc),
m32c_get_reloc (relax_reloc[i].new_reloc));
#endif
/* Note that we've changed the relocs, section contents, etc. */
elf_section_data (sec)->relocs = internal_relocs;
free_relocs = NULL;
elf_section_data (sec)->this_hdr.contents = contents;
free_contents = NULL;
symtab_hdr->contents = (bfd_byte *) extsyms;
free_extsyms = NULL;
/* Delete TO_DELETE bytes of data. */
if (! m32c_elf_relax_delete_bytes
(abfd, sec, irel->r_offset + relax_reloc[i].value_shift,
to_delete))
goto error_return;
} /* next relax_reloc */
} /* next relocation */
if (free_relocs != NULL)
{
free (free_relocs);
free_relocs = NULL;
}
if (free_contents != NULL)
{
if (! link_info->keep_memory)
free (free_contents);
/* Cache the section contents for elf_link_input_bfd. */
else
elf_section_data (sec)->this_hdr.contents = contents;
free_contents = NULL;
}
if (shndx_buf != NULL)
{
shndx_hdr->contents = NULL;
free (shndx_buf);
}
if (free_extsyms != NULL)
{
if (! link_info->keep_memory)
free (free_extsyms);
/* Cache the symbols for elf_link_input_bfd. */
else
symtab_hdr->contents = NULL /* (unsigned char *) extsyms*/;
free_extsyms = NULL;
}
/* elf_link_input_bfd expects internal syms. */
symtab_hdr->contents = NULL;
return TRUE;
error_return:
if (free_relocs != NULL)
free (free_relocs);
if (free_contents != NULL)
free (free_contents);
if (shndx_buf != NULL)
{
shndx_hdr->contents = NULL;
free (shndx_buf);
}
if (free_extsyms != NULL)
free (free_extsyms);
return FALSE;
}
/* Delete some bytes from a section while relaxing. */
static bfd_boolean
m32c_elf_relax_delete_bytes
(bfd * abfd,
asection * sec,
bfd_vma addr,
int count)
{
Elf_Internal_Shdr *symtab_hdr;
Elf_Internal_Shdr *shndx_hdr;
int sec_shndx;
bfd_byte *contents;
Elf_Internal_Rela *irel;
Elf_Internal_Rela *irelend;
Elf_Internal_Rela *irelalign;
bfd_vma toaddr;
Elf32_External_Sym *esym;
Elf32_External_Sym *esymend;
Elf32_External_Sym *extsyms;
Elf_External_Sym_Shndx *shndx_buf;
Elf_External_Sym_Shndx *shndx;
struct elf_link_hash_entry ** sym_hashes;
struct elf_link_hash_entry ** end_hashes;
unsigned int symcount;
symtab_hdr = & elf_tdata (abfd)->symtab_hdr;
extsyms = (Elf32_External_Sym *) symtab_hdr->contents;
shndx_hdr = & elf_tdata (abfd)->symtab_shndx_hdr;
shndx_buf = (Elf_External_Sym_Shndx *) shndx_hdr->contents;
sec_shndx = _bfd_elf_section_from_bfd_section (abfd, sec);
contents = elf_section_data (sec)->this_hdr.contents;
/* The deletion must stop at the next ALIGN reloc for an aligment
power larger than the number of bytes we are deleting. */
irelalign = NULL;
toaddr = sec->size;
irel = elf_section_data (sec)->relocs;
irelend = irel + sec->reloc_count;
/* Actually delete the bytes. */
memmove (contents + addr, contents + addr + count, (size_t) (toaddr - addr - count));
sec->size -= count;
/* Adjust all the relocs. */
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 -= count;
if (irel->r_addend > addr && irel->r_addend < toaddr)
irel->r_addend -= count;
}
/* Adjust the local symbols defined in this section. */
shndx = shndx_buf;
esym = extsyms;
esymend = esym + symtab_hdr->sh_info;
for (; esym < esymend; esym++, shndx = (shndx ? shndx + 1 : NULL))
{
Elf_Internal_Sym isym;
Elf_External_Sym_Shndx dummy;
bfd_elf32_swap_symbol_in (abfd, esym, shndx, &isym);
if ((int) isym.st_shndx == sec_shndx
&& isym.st_value > addr
&& isym.st_value < toaddr)
{
isym.st_value -= count;
bfd_elf32_swap_symbol_out (abfd, &isym, (PTR) esym, (PTR) & dummy);
}
}
/* Now adjust the global symbols defined in this section. */
symcount = (symtab_hdr->sh_size / sizeof (Elf32_External_Sym)
- symtab_hdr->sh_info);
sym_hashes = elf_sym_hashes (abfd);
// sym_hashes += symtab_hdr->sh_info;
end_hashes = sym_hashes + symcount;
for (; sym_hashes < end_hashes; sym_hashes ++)
{
struct elf_link_hash_entry * sym_hash = * sym_hashes;
if (sym_hash &&
( sym_hash->root.type == bfd_link_hash_defined
|| sym_hash->root.type == bfd_link_hash_defweak)
&& sym_hash->root.u.def.section == sec
&& sym_hash->root.u.def.value > addr
&& sym_hash->root.u.def.value < toaddr)
sym_hash->root.u.def.value -= count;
}
return TRUE;
}
#define ELF_ARCH bfd_arch_m32c
#define ELF_MACHINE_CODE EM_M32C
#define ELF_MAXPAGESIZE 0x1000
#if 0
#define TARGET_BIG_SYM bfd_elf32_m32c_vec
#define TARGET_BIG_NAME "elf32-m32c"
#else
#define TARGET_LITTLE_SYM bfd_elf32_m32c_vec
#define TARGET_LITTLE_NAME "elf32-m32c"
#endif
#define elf_info_to_howto_rel NULL
#define elf_info_to_howto m32c_info_to_howto_rela
#define elf_backend_object_p m32c_elf_object_p
#define elf_backend_relocate_section m32c_elf_relocate_section
#define elf_backend_gc_mark_hook m32c_elf_gc_mark_hook
#define elf_backend_gc_sweep_hook m32c_elf_gc_sweep_hook
#define elf_backend_check_relocs m32c_elf_check_relocs
#define elf_backend_object_p m32c_elf_object_p
#define elf_symbol_leading_char ('_')
#define elf_backend_always_size_sections \
m32c_elf_always_size_sections
#define elf_backend_finish_dynamic_sections \
m32c_elf_finish_dynamic_sections
#define elf_backend_can_gc_sections 1
#define bfd_elf32_bfd_reloc_type_lookup m32c_reloc_type_lookup
#define bfd_elf32_bfd_relax_section m32c_elf_relax_section
#define bfd_elf32_bfd_set_private_flags m32c_elf_set_private_flags
#define bfd_elf32_bfd_merge_private_bfd_data m32c_elf_merge_private_bfd_data
#define bfd_elf32_bfd_print_private_bfd_data m32c_elf_print_private_bfd_data
#include "elf32-target.h"
Reference in New Issue View Git Blame Copy Permalink