/* FRV-specific support for 32-bit ELF.
- Copyright 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+ Copyright 2002, 2003, 2004, 2005, 2006, 2007
+ Free Software Foundation, Inc.
-This file is part of BFD, the Binary File Descriptor library.
+ 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 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 3 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.
+ 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
+ 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., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
-#include "bfd.h"
#include "sysdep.h"
+#include "bfd.h"
#include "libbfd.h"
#include "elf-bfd.h"
#include "elf/frv.h"
static bfd_reloc_status_type frv_final_link_relocate
PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
Elf_Internal_Rela *, bfd_vma));
-static bfd_boolean elf32_frv_gc_sweep_hook
- PARAMS ((bfd *, struct bfd_link_info *, asection *, const
- Elf_Internal_Rela *));
-static asection * elf32_frv_gc_mark_hook
- PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
- struct elf_link_hash_entry *, Elf_Internal_Sym *));
static bfd_boolean elf32_frv_check_relocs
PARAMS ((bfd *, struct bfd_link_info *, asection *,
const Elf_Internal_Rela *));
return NULL;
}
+static reloc_howto_type *
+frv_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
+{
+ unsigned int i;
+
+ for (i = 0;
+ i < sizeof (elf32_frv_howto_table) / sizeof (elf32_frv_howto_table[0]);
+ i++)
+ if (elf32_frv_howto_table[i].name != NULL
+ && strcasecmp (elf32_frv_howto_table[i].name, r_name) == 0)
+ return &elf32_frv_howto_table[i];
+
+ if (strcasecmp (elf32_frv_vtinherit_howto.name, r_name) == 0)
+ return &elf32_frv_vtinherit_howto;
+ if (strcasecmp (elf32_frv_vtentry_howto.name, r_name) == 0)
+ return &elf32_frv_vtentry_howto;
+
+ return NULL;
+}
+
/* Set the howto pointer for an FRV ELF reloc. */
static void
int silence_segment_error = !(info->shared || info->pie);
unsigned long insn;
- 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;
|| r_type == R_FRV_GNU_VTENTRY)
continue;
- /* This is a final link. */
r_symndx = ELF32_R_SYM (rel->r_info);
howto = elf32_frv_howto_table + ELF32_R_TYPE (rel->r_info);
h = NULL;
}
else
{
- h = sym_hashes [r_symndx - symtab_hdr->sh_info];
+ bfd_boolean warned;
+ bfd_boolean unresolved_reloc;
- 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;
+ RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
+ r_symndx, symtab_hdr, sym_hashes,
+ h, sec, relocation,
+ unresolved_reloc, warned);
+ osec = sec;
+ }
+
+ if (sec != NULL && elf_discarded_section (sec))
+ {
+ /* For relocs against symbols from removed linkonce sections,
+ or sections discarded by a linker script, we just want the
+ section contents zeroed. Avoid any special processing. */
+ _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
+ rel->r_info = 0;
+ rel->r_addend = 0;
+ continue;
+ }
- name = h->root.root.string;
+ if (info->relocatable)
+ continue;
- if ((h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak))
- {
- if (/* TLSMOFF forces local binding. */
- r_type != R_FRV_TLSMOFF
- && ! FRVFDPIC_SYM_LOCAL (info, h))
- {
- sec = NULL;
- relocation = 0;
- }
- else
- {
- 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->unresolved_syms_in_objects == RM_IGNORE
- && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
- relocation = 0;
- else
- {
- if (! ((*info->callbacks->undefined_symbol)
- (info, h->root.root.string, input_bfd,
- input_section, rel->r_offset,
- (info->unresolved_syms_in_objects == RM_GENERATE_ERROR
- || ELF_ST_VISIBILITY (h->other)))))
- return FALSE;
- relocation = 0;
- }
- osec = sec;
+ if (r_type != R_FRV_TLSMOFF
+ && h != NULL
+ && (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && !FRVFDPIC_SYM_LOCAL (info, h))
+ {
+ osec = sec = NULL;
+ relocation = 0;
}
switch (r_type)
input_section->output_section)
& (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
{
+ bfd_vma offset;
+
if (_frvfdpic_osec_readonly_p (output_bfd,
input_section
->output_section))
name, input_bfd, input_section, rel->r_offset);
return FALSE;
}
- _frvfdpic_add_rofixup (output_bfd,
- frvfdpic_gotfixup_section
- (info),
- _bfd_elf_section_offset
- (output_bfd, info,
- input_section, rel->r_offset)
- + input_section
- ->output_section->vma
- + input_section->output_offset,
- picrel);
+
+ offset = _bfd_elf_section_offset
+ (output_bfd, info,
+ input_section, rel->r_offset);
+
+ if (offset != (bfd_vma)-1)
+ _frvfdpic_add_rofixup (output_bfd,
+ frvfdpic_gotfixup_section
+ (info),
+ offset + input_section
+ ->output_section->vma
+ + input_section->output_offset,
+ picrel);
}
}
else if ((bfd_get_section_flags (output_bfd,
input_section->output_section)
& (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
{
+ bfd_vma offset;
+
if (_frvfdpic_osec_readonly_p (output_bfd,
input_section
->output_section))
name, input_bfd, input_section, rel->r_offset);
return FALSE;
}
- _frvfdpic_add_dyn_reloc (output_bfd,
- frvfdpic_gotrel_section (info),
- _bfd_elf_section_offset
- (output_bfd, info,
- input_section, rel->r_offset)
- + input_section
- ->output_section->vma
- + input_section->output_offset,
- r_type, dynindx, addend, picrel);
+
+ offset = _bfd_elf_section_offset
+ (output_bfd, info,
+ input_section, rel->r_offset);
+
+ if (offset != (bfd_vma)-1)
+ _frvfdpic_add_dyn_reloc (output_bfd,
+ frvfdpic_gotrel_section (info),
+ offset + input_section
+ ->output_section->vma
+ + input_section->output_offset,
+ r_type, dynindx, addend, picrel);
}
else
addend += frvfdpic_got_section (info)->output_section->vma;
}
if (!h || h->root.type != bfd_link_hash_undefweak)
{
- _frvfdpic_add_rofixup (output_bfd,
- frvfdpic_gotfixup_section
- (info),
- _bfd_elf_section_offset
- (output_bfd, info,
- input_section, rel->r_offset)
- + input_section
- ->output_section->vma
- + input_section->output_offset,
- picrel);
- if (r_type == R_FRV_FUNCDESC_VALUE)
- _frvfdpic_add_rofixup
- (output_bfd,
- frvfdpic_gotfixup_section (info),
- _bfd_elf_section_offset
- (output_bfd, info,
- input_section, rel->r_offset)
- + input_section->output_section->vma
- + input_section->output_offset + 4, picrel);
+ bfd_vma offset = _bfd_elf_section_offset
+ (output_bfd, info,
+ input_section, rel->r_offset);
+
+ if (offset != (bfd_vma)-1)
+ {
+ _frvfdpic_add_rofixup (output_bfd,
+ frvfdpic_gotfixup_section
+ (info),
+ offset + input_section
+ ->output_section->vma
+ + input_section->output_offset,
+ picrel);
+ if (r_type == R_FRV_FUNCDESC_VALUE)
+ _frvfdpic_add_rofixup
+ (output_bfd,
+ frvfdpic_gotfixup_section (info),
+ offset
+ + input_section->output_section->vma
+ + input_section->output_offset + 4, picrel);
+ }
}
}
}
input_section->output_section)
& (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD))
{
+ bfd_vma offset;
+
if (_frvfdpic_osec_readonly_p (output_bfd,
input_section
->output_section))
name, input_bfd, input_section, rel->r_offset);
return FALSE;
}
- _frvfdpic_add_dyn_reloc (output_bfd,
- frvfdpic_gotrel_section (info),
- _bfd_elf_section_offset
- (output_bfd, info,
- input_section, rel->r_offset)
- + input_section
- ->output_section->vma
- + input_section->output_offset,
- r_type, dynindx, addend, picrel);
+
+ offset = _bfd_elf_section_offset
+ (output_bfd, info,
+ input_section, rel->r_offset);
+
+ if (offset != (bfd_vma)-1)
+ _frvfdpic_add_dyn_reloc (output_bfd,
+ frvfdpic_gotrel_section (info),
+ offset + input_section
+ ->output_section->vma
+ + input_section->output_offset,
+ r_type, dynindx, addend, picrel);
}
else if (osec)
addend += osec->output_section->vma;
relocation. */
static asection *
-elf32_frv_gc_mark_hook (sec, info, rel, h, sym)
- asection *sec;
- struct bfd_link_info *info ATTRIBUTE_UNUSED;
- Elf_Internal_Rela *rel;
- struct elf_link_hash_entry *h;
- Elf_Internal_Sym *sym;
+elf32_frv_gc_mark_hook (asection *sec,
+ struct bfd_link_info *info,
+ Elf_Internal_Rela *rel,
+ struct elf_link_hash_entry *h,
+ Elf_Internal_Sym *sym)
{
if (h != NULL)
- {
- switch (ELF32_R_TYPE (rel->r_info))
- {
- case R_FRV_GNU_VTINHERIT:
- case R_FRV_GNU_VTENTRY:
- break;
-
- default:
- switch (h->root.type)
- {
- default:
- break;
-
- 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;
- }
- }
- }
- else
- return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
-
- return NULL;
-}
-
-/* Update the got entry reference counts for the section being removed. */
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ case R_FRV_GNU_VTINHERIT:
+ case R_FRV_GNU_VTENTRY:
+ return NULL;
+ }
-static bfd_boolean
-elf32_frv_gc_sweep_hook (abfd, info, sec, relocs)
- bfd *abfd ATTRIBUTE_UNUSED;
- struct bfd_link_info *info ATTRIBUTE_UNUSED;
- asection *sec ATTRIBUTE_UNUSED;
- const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
-{
- return TRUE;
+ return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
}
-
\f
/* Hook called by the linker routine which adds symbols from an object
file. We use it to put .comm items in .scomm, and not .comm. */
if (!info->relocatable)
{
struct elf_link_hash_entry *h;
- asection *sec;
/* Force a PT_GNU_STACK segment to be created. */
if (! elf_tdata (output_bfd)->stack_flags)
h->type = STT_OBJECT;
/* This one must NOT be hidden. */
}
+ }
+
+ return TRUE;
+}
+
+/* Check whether any of the relocations was optimized away, and
+ subtract it from the relocation or fixup count. */
+static bfd_boolean
+_frvfdpic_check_discarded_relocs (bfd *abfd, asection *sec,
+ struct bfd_link_info *info,
+
+ bfd_boolean *changed)
+{
+ Elf_Internal_Shdr *symtab_hdr;
+ struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
+ Elf_Internal_Rela *rel, *erel;
+
+ if ((sec->flags & SEC_RELOC) == 0
+ || sec->reloc_count == 0)
+ 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;
- /* Create a stack section, and set its alignment. */
- sec = bfd_make_section (output_bfd, ".stack");
+ rel = elf_section_data (sec)->relocs;
- if (sec == NULL
- || ! bfd_set_section_alignment (output_bfd, sec, 3))
+ /* Now examine each relocation. */
+ for (erel = rel + sec->reloc_count; rel < erel; rel++)
+ {
+ struct elf_link_hash_entry *h;
+ unsigned long r_symndx;
+ struct frvfdpic_relocs_info *picrel;
+ struct _frvfdpic_dynamic_got_info *dinfo;
+
+ if (ELF32_R_TYPE (rel->r_info) != R_FRV_32
+ && ELF32_R_TYPE (rel->r_info) != R_FRV_FUNCDESC)
+ continue;
+
+ if (_bfd_elf_section_offset (sec->output_section->owner,
+ info, sec, rel->r_offset)
+ != (bfd_vma)-1)
+ continue;
+
+ 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;
+ }
+
+ if (h != NULL)
+ picrel = frvfdpic_relocs_info_for_global (frvfdpic_relocs_info (info),
+ abfd, h,
+ rel->r_addend, NO_INSERT);
+ else
+ picrel = frvfdpic_relocs_info_for_local (frvfdpic_relocs_info (info),
+ abfd, r_symndx,
+ rel->r_addend, NO_INSERT);
+
+ if (! picrel)
+ return FALSE;
+
+ *changed = TRUE;
+ dinfo = frvfdpic_dynamic_got_plt_info (info);
+
+ _frvfdpic_count_relocs_fixups (picrel, dinfo, TRUE);
+ if (ELF32_R_TYPE (rel->r_info) == R_FRV_32)
+ picrel->relocs32--;
+ else /* we know (ELF32_R_TYPE (rel->r_info) == R_FRV_FUNCDESC) */
+ picrel->relocsfd--;
+ _frvfdpic_count_relocs_fixups (picrel, dinfo, FALSE);
+ }
+
+ return TRUE;
+}
+
+static bfd_boolean
+frvfdpic_elf_discard_info (bfd *ibfd,
+ struct elf_reloc_cookie *cookie ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info)
+{
+ bfd_boolean changed = FALSE;
+ asection *s;
+ bfd *obfd = NULL;
+
+ /* Account for relaxation of .eh_frame section. */
+ for (s = ibfd->sections; s; s = s->next)
+ if (s->sec_info_type == ELF_INFO_TYPE_EH_FRAME)
+ {
+ if (!_frvfdpic_check_discarded_relocs (ibfd, s, info, &changed))
+ return FALSE;
+ obfd = s->output_section->owner;
+ }
+
+ if (changed)
+ {
+ struct _frvfdpic_dynamic_got_plt_info gpinfo;
+
+ memset (&gpinfo, 0, sizeof (gpinfo));
+ memcpy (&gpinfo.g, frvfdpic_dynamic_got_plt_info (info),
+ sizeof (gpinfo.g));
+
+ /* Clear GOT and PLT assignments. */
+ htab_traverse (frvfdpic_relocs_info (info),
+ _frvfdpic_reset_got_plt_entries,
+ NULL);
+
+ if (!_frvfdpic_size_got_plt (obfd, &gpinfo))
return FALSE;
}
}
static bfd_boolean
-elf32_frvfdpic_modify_segment_map (bfd *output_bfd,
- struct bfd_link_info *info)
+elf32_frvfdpic_modify_program_headers (bfd *output_bfd,
+ struct bfd_link_info *info)
{
+ struct elf_obj_tdata *tdata = elf_tdata (output_bfd);
struct elf_segment_map *m;
+ Elf_Internal_Phdr *p;
/* objcopy and strip preserve what's already there using
elf32_frvfdpic_copy_private_bfd_data (). */
if (! info)
return TRUE;
- for (m = elf_tdata (output_bfd)->segment_map; m != NULL; m = m->next)
+ for (p = tdata->phdr, m = tdata->segment_map; m != NULL; m = m->next, p++)
if (m->p_type == PT_GNU_STACK)
break;
if (m)
{
- asection *sec = bfd_get_section_by_name (output_bfd, ".stack");
struct elf_link_hash_entry *h;
- if (sec)
+ /* Obtain the pointer to the __stacksize symbol. */
+ h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
+ FALSE, FALSE, FALSE);
+ if (h)
{
- /* Obtain the pointer to the __stacksize symbol. */
- h = elf_link_hash_lookup (elf_hash_table (info), "__stacksize",
- FALSE, FALSE, FALSE);
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;
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
BFD_ASSERT (h->root.type == bfd_link_hash_defined);
+ }
- /* Set the section size from the symbol value. We
- intentionally ignore the symbol section. */
- if (h->root.type == bfd_link_hash_defined)
- sec->size = h->root.u.def.value;
- else
- sec->size = DEFAULT_STACK_SIZE;
+ /* Set the header p_memsz from the symbol value. We
+ intentionally ignore the symbol section. */
+ if (h && h->root.type == bfd_link_hash_defined)
+ p->p_memsz = h->root.u.def.value;
+ else
+ p->p_memsz = DEFAULT_STACK_SIZE;
- /* Add the stack section to the PT_GNU_STACK segment,
- such that its size and alignment requirements make it
- to the segment. */
- if (m->count == 0)
- {
- m->sections[m->count] = sec;
- m->count++;
- }
- }
+ p->p_align = 8;
}
return TRUE;
elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
elf_flags_init (obfd) = TRUE;
+
+ /* Copy object attributes. */
+ _bfd_elf_copy_obj_attributes (ibfd, obfd);
+
return TRUE;
}
#define elf_info_to_howto frv_info_to_howto_rela
#define elf_backend_relocate_section elf32_frv_relocate_section
#define elf_backend_gc_mark_hook elf32_frv_gc_mark_hook
-#define elf_backend_gc_sweep_hook elf32_frv_gc_sweep_hook
#define elf_backend_check_relocs elf32_frv_check_relocs
#define elf_backend_object_p elf32_frv_object_p
#define elf_backend_add_symbol_hook elf32_frv_add_symbol_hook
#define elf_backend_rela_normal 1
#define bfd_elf32_bfd_reloc_type_lookup frv_reloc_type_lookup
+#define bfd_elf32_bfd_reloc_name_lookup frv_reloc_name_lookup
#define bfd_elf32_bfd_set_private_flags frv_elf_set_private_flags
#define bfd_elf32_bfd_copy_private_bfd_data frv_elf_copy_private_bfd_data
#define bfd_elf32_bfd_merge_private_bfd_data frv_elf_merge_private_bfd_data
#undef elf_backend_always_size_sections
#define elf_backend_always_size_sections \
elf32_frvfdpic_always_size_sections
-#undef elf_backend_modify_segment_map
-#define elf_backend_modify_segment_map \
- elf32_frvfdpic_modify_segment_map
+#undef elf_backend_modify_program_headers
+#define elf_backend_modify_program_headers \
+ elf32_frvfdpic_modify_program_headers
#undef bfd_elf32_bfd_copy_private_bfd_data
#define bfd_elf32_bfd_copy_private_bfd_data \
elf32_frvfdpic_copy_private_bfd_data
#define elf_backend_finish_dynamic_sections \
elf32_frvfdpic_finish_dynamic_sections
+#undef elf_backend_discard_info
+#define elf_backend_discard_info \
+ frvfdpic_elf_discard_info
#undef elf_backend_can_make_relative_eh_frame
#define elf_backend_can_make_relative_eh_frame \
frvfdpic_elf_use_relative_eh_frame
projects / deliverable / binutils-gdb.git / blobdiff