/* M16C/M32C specific support for 32-bit ELF.
- Copyright (C) 2005, 2006
+ Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
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,
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 "bfd.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/m32c.h"
(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);
+char * m32c_get_reloc (long reloc);
+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);
0, /* dst_mask */
FALSE), /* pcrel_offset */
+ /* GCC intentionally overflows these next two in order to work
+ around limitations in the addressing modes, so don't complain
+ about overflow. */
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 */
+ complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32C_16", /* name */
FALSE, /* partial_inplace */
24, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
+ complain_overflow_dont, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_M32C_24", /* name */
FALSE, /* partial_inplace */
return NULL;
}
+static reloc_howto_type *
+m32c_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
+{
+ unsigned int i;
+
+ for (i = 0;
+ i < sizeof (m32c_elf_howto_table) / sizeof (m32c_elf_howto_table[0]);
+ i++)
+ if (m32c_elf_howto_table[i].name != NULL
+ && strcasecmp (m32c_elf_howto_table[i].name, r_name) == 0)
+ return &m32c_elf_howto_table[i];
+
+ return NULL;
+}
+
/* Set the howto pointer for an M32C ELF reloc. */
static void
dynobj = elf_hash_table (info)->dynobj;
splt = NULL;
if (dynobj != NULL)
- splt = bfd_get_section_by_name (dynobj, ".plt");
+ splt = bfd_get_linker_section (dynobj, ".plt");
for (rel = relocs; rel < relend; rel ++)
{
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;
+ relocation = 0;
if (r_symndx < symtab_hdr->sh_info)
{
+ sec->output_offset);
}
else if (h->root.type == bfd_link_hash_undefweak)
- {
- relocation = 0;
- }
- else
+ ;
+ else if (!info->relocatable)
{
if (! ((*info->callbacks->undefined_symbol)
(info, h->root.root.string, input_bfd,
input_section, rel->r_offset, TRUE)))
return FALSE;
- relocation = 0;
}
}
+ if (sec != NULL && discarded_section (sec))
+ RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
+ rel, 1, relend, howto, 0, contents);
+
+ 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 (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
+ rel->r_addend += sec->output_offset;
+ continue;
+ }
+
switch (ELF32_R_TYPE (rel->r_info))
{
case R_M32C_16:
relocation = (splt->output_section->vma
+ splt->output_offset
+ (*plt_offset & -2));
+ if (name)
+ {
+ char *newname = bfd_malloc (strlen(name)+5);
+ strcpy (newname, name);
+ strcat(newname, ".plt");
+ _bfd_generic_link_add_one_symbol (info,
+ input_bfd,
+ newname,
+ BSF_FUNCTION | BSF_WEAK,
+ splt,
+ (*plt_offset & -2),
+ 0,
+ 1,
+ 0,
+ 0);
+ }
}
}
break;
}
#if 0
- printf("relocate %s at %06lx relocation %06lx addend %ld ",
- m32c_elf_howto_table[ELF32_R_TYPE(rel->r_info)].name,
- rel->r_offset, relocation, rel->r_addend);
+ printf ("relocate %s at %06lx relocation %06lx addend %ld ",
+ m32c_elf_howto_table[ELF32_R_TYPE(rel->r_info)].name,
+ rel->r_offset + input_section->output_section->vma + input_section->output_offset,
+ relocation, rel->r_addend);
{
int i;
for (i=0; i<4; i++)
- printf(" %02x", contents[rel->r_offset+i]);
- printf("\n");
+ printf (" %02x", contents[rel->r_offset+i]);
+ printf ("\n");
}
#endif
r = _bfd_final_link_relocate (howto, input_bfd, input_section,
return TRUE;
}
\f
-/* 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. */
{
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;
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++)
{
elf_hash_table (info)->dynobj = dynobj = abfd;
if (splt == NULL)
{
- splt = bfd_get_section_by_name (dynobj, ".plt");
+ splt = bfd_get_linker_section (dynobj, ".plt");
if (splt == NULL)
{
- splt = bfd_make_section (dynobj, ".plt");
+ flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
+ | SEC_IN_MEMORY | SEC_LINKER_CREATED
+ | SEC_READONLY | SEC_CODE);
+ splt = bfd_make_section_anyway_with_flags (dynobj, ".plt",
+ flags);
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;
}
been filled in. */
if ((dynobj = elf_hash_table (info)->dynobj) != NULL
- && (splt = bfd_get_section_by_name (dynobj, ".plt")) != NULL)
+ && (splt = bfd_get_linker_section (dynobj, ".plt")) != NULL)
{
bfd_byte *contents = splt->contents;
unsigned int i, size = splt->size;
if (dynobj == NULL)
return TRUE;
- splt = bfd_get_section_by_name (dynobj, ".plt");
+ splt = bfd_get_linker_section (dynobj, ".plt");
BFD_ASSERT (splt != NULL);
splt->contents = (bfd_byte *) bfd_zalloc (dynobj, splt->size);
\f
static bfd_boolean
-m32c_elf_print_private_bfd_data (bfd *abfd, PTR ptr)
+m32c_elf_print_private_bfd_data (bfd *abfd, void *ptr)
{
FILE *file = (FILE *) ptr;
flagword flags;
_bfd_elf_print_private_bfd_data (abfd, ptr);
flags = elf_elfheader (abfd)->e_flags;
- fprintf (file, _("private flags = 0x%lx:"), (long)flags);
+ fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags);
switch (flags & EF_M32C_CPU_MASK)
{
\f
#ifdef DEBUG
-static void
+void
dump_symtab (bfd * abfd, void *internal_syms, void *external_syms)
{
size_t locsymcount;
{
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";
free (external_syms);
}
-static char *
+char *
m32c_get_reloc (long reloc)
{
if (0 <= reloc && reloc < R_M32C_max)
};
static bfd_boolean
-m32c_relax_plt_check (struct elf_link_hash_entry *h,
- PTR xdata)
+m32c_relax_plt_check (struct elf_link_hash_entry *h, void * 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;
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)
+m32c_relax_plt_realloc (struct elf_link_hash_entry *h, void * 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;
}
static bfd_boolean
-m32c_elf_relax_plt_section (bfd *dynobj,
- asection *splt,
+m32c_elf_relax_plt_section (asection *splt,
struct bfd_link_info *info,
bfd_boolean *again)
{
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;
return i1->r_offset < i2->r_offset ? -1 : 1;
}
-#define OFFSET_FOR_RELOC(rel) m32c_offset_for_reloc (abfd, sec, rel, symtab_hdr, shndx_buf, intsyms)
+#define OFFSET_FOR_RELOC(rel) m32c_offset_for_reloc (abfd, rel, symtab_hdr, shndx_buf, intsyms)
static bfd_vma
m32c_offset_for_reloc (bfd *abfd,
- asection * sec,
Elf_Internal_Rela *rel,
Elf_Internal_Shdr *symtab_hdr,
- Elf_External_Sym_Shndx *shndx_buf,
+ Elf_External_Sym_Shndx *shndx_buf ATTRIBUTE_UNUSED,
Elf_Internal_Sym *intsyms)
{
bfd_vma symval;
{
/* A local symbol. */
Elf_Internal_Sym *isym;
- Elf_External_Sym_Shndx *shndx;
+ asection *ssec;
isym = intsyms + ELF32_R_SYM (rel->r_info);
- shndx = shndx_buf + (shndx_buf ? ELF32_R_SYM (rel->r_info) : 0);
-
- symval = (isym->st_value
- + sec->output_section->vma
- + sec->output_offset);
+ ssec = bfd_section_from_elf_index (abfd, isym->st_shndx);
+ symval = isym->st_value;
+ if (ssec)
+ symval += ssec->output_section->vma
+ + ssec->output_offset;
}
else
{
int machine;
if (abfd == elf_hash_table (link_info)->dynobj
+ && (sec->flags & SEC_LINKER_CREATED) != 0
&& strcmp (sec->name, ".plt") == 0)
- return m32c_elf_relax_plt_section (abfd, sec, link_info, again);
+ return m32c_elf_relax_plt_section (sec, link_info, again);
/* Assume nothing changes. */
*again = FALSE;
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)
+ || bfd_bread (shndx_buf, amt, abfd) != amt)
goto error_return;
shndx_hdr->contents = (bfd_byte *) shndx_buf;
}
/* Get a copy of the native relocations. */
internal_relocs = (_bfd_elf_link_read_relocs
- (abfd, sec, (PTR) NULL, (Elf_Internal_Rela *) NULL,
+ (abfd, sec, NULL, (Elf_Internal_Rela *) NULL,
link_info->keep_memory));
if (internal_relocs == NULL)
goto error_return;
/* Setting gap_size nonzero is the flag which means "something
shrunk". */
gap_size = 0;
+ gap = NULL;
new_type = ELF32_R_TYPE(srel->r_info);
pc = sec->output_section->vma + sec->output_offset
bfd_byte *contents;
Elf_Internal_Rela *irel;
Elf_Internal_Rela *irelend;
- Elf_Internal_Rela *irelalign;
bfd_vma toaddr;
Elf_Internal_Sym *isym;
Elf_Internal_Sym *isymend;
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;
for (; isym < isymend; isym++, shndx = (shndx ? shndx + 1 : NULL))
{
-
+ /* If the symbol is in the range of memory we just moved, we
+ have to adjust its value. */
if ((int) isym->st_shndx == sec_shndx
&& isym->st_value > addr
&& isym->st_value < toaddr)
{
isym->st_value -= count;
}
+ /* If the symbol *spans* the bytes we just deleted (i.e. it's
+ *end* is in the moved bytes but it's *start* isn't), then we
+ must adjust its size. */
+ if ((int) isym->st_shndx == sec_shndx
+ && isym->st_value < addr
+ && isym->st_value + isym->st_size > addr
+ && isym->st_value + isym->st_size < toaddr)
+ {
+ isym->st_size -= count;
+ }
}
/* Now adjust the global symbols defined in this section. */
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_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.section == sec)
{
- sym_hash->root.u.def.value -= count;
+ if (sym_hash->root.u.def.value > addr
+ && sym_hash->root.u.def.value < toaddr)
+ {
+ sym_hash->root.u.def.value -= count;
+ }
+ if (sym_hash->root.u.def.value < addr
+ && sym_hash->root.u.def.value + sym_hash->size > addr
+ && sym_hash->root.u.def.value + sym_hash->size < toaddr)
+ {
+ sym_hash->size -= count;
+ }
}
}
return TRUE;
}
+\f
+/* This is for versions of gcc prior to 4.3. */
+static unsigned int
+_bfd_m32c_elf_eh_frame_address_size (bfd *abfd, asection *sec ATTRIBUTE_UNUSED)
+{
+ if ((elf_elfheader (abfd)->e_flags & EF_M32C_CPU_MASK) == EF_M32C_CPU_M16C)
+ return 2;
+ return 4;
+}
+
\f
#define ELF_ARCH bfd_arch_m32c
#define ELF_MACHINE_CODE EM_M32C
-#define ELF_MAXPAGESIZE 0x1000
+#define ELF_MACHINE_ALT1 EM_M32C_OLD
+#define ELF_MAXPAGESIZE 0x100
#if 0
#define TARGET_BIG_SYM bfd_elf32_m32c_vec
#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 ('_')
m32c_elf_finish_dynamic_sections
#define elf_backend_can_gc_sections 1
+#define elf_backend_eh_frame_address_size _bfd_m32c_elf_eh_frame_address_size
#define bfd_elf32_bfd_reloc_type_lookup m32c_reloc_type_lookup
+#define bfd_elf32_bfd_reloc_name_lookup m32c_reloc_name_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
projects / deliverable / binutils-gdb.git / blobdiff