/* PowerPC-specific support for 32-bit ELF
Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
- 2004, 2005 Free Software Foundation, Inc.
+ 2004, 2005, 2006 Free Software Foundation, Inc.
Written by Ian Lance Taylor, Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
const char *bss_name;
/* Associated symbol name. */
const char *sym_name;
- /* Value of symbol. */
- bfd_vma sym_val;
+ /* Associated symbol. */
+ struct elf_link_hash_entry *sym;
} elf_linker_section_t;
/* Linked list of allocated pointer entries. This hangs off of the
static bfd_boolean
ppc_elf_mkobject (bfd *abfd)
{
- bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
- abfd->tdata.any = bfd_zalloc (abfd, amt);
if (abfd->tdata.any == NULL)
- return FALSE;
- return TRUE;
+ {
+ bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
+ abfd->tdata.any = bfd_zalloc (abfd, amt);
+ if (abfd->tdata.any == NULL)
+ return FALSE;
+ }
+ return bfd_elf_mkobject (abfd);
}
/* Fix bad default arch selected for a 32 bit input bfd when the
Elf_Internal_Shdr *shdr,
asection *asect)
{
- if ((asect->flags & SEC_EXCLUDE) != 0)
+ if ((asect->flags & (SEC_GROUP | SEC_EXCLUDE)) == SEC_EXCLUDE)
shdr->sh_flags |= SHF_EXCLUDE;
if ((asect->flags & SEC_SORT_ENTRIES) != 0)
need to bump up the number of section headers. */
static int
-ppc_elf_additional_program_headers (bfd *abfd)
+ppc_elf_additional_program_headers (bfd *abfd,
+ struct bfd_link_info *info ATTRIBUTE_UNUSED)
{
asection *s;
int ret = 0;
#define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
+enum ppc_elf_plt_type {
+ PLT_UNSET,
+ PLT_OLD,
+ PLT_NEW,
+ PLT_VXWORKS
+};
+
/* PPC ELF linker hash table. */
struct ppc_elf_link_hash_table
/* Non-zero if allocating the header left a gap. */
unsigned int got_gap;
- /* Whether to use new plt/got layout or not. */
- unsigned int new_plt:1;
- unsigned int old_plt:1;
+ /* The type of PLT we have chosen to use. */
+ enum ppc_elf_plt_type plt_type;
+
+ /* Whether we can use the new PLT layout. */
+ unsigned int can_use_new_plt:1;
+
+ /* Set if we should emit symbols for stubs. */
+ unsigned int emit_stub_syms:1;
/* Small local sym to section mapping cache. */
struct sym_sec_cache sym_sec;
/* The .got.plt section (VxWorks only)*/
asection *sgotplt;
- /* Short-cuts to frequently used symbols on VxWorks targets. */
- struct elf_link_hash_entry *hgot, *hplt;
-
/* True if the target system is VxWorks. */
int is_vxworks;
if (ret == NULL)
return NULL;
- if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd,
- ppc_elf_link_hash_newfunc))
+ if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
+ ppc_elf_link_hash_newfunc,
+ sizeof (struct ppc_elf_link_hash_entry)))
{
free (ret);
return NULL;
return FALSE;
}
- /* Create the section for VxWorks static plt relocations. */
- if (htab->is_vxworks && !info->shared)
- {
- s = bfd_make_section (abfd, ".rela.plt.unloaded");
- flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_READONLY
- | SEC_LINKER_CREATED);
- if (s == NULL
- || ! bfd_set_section_flags (abfd, s, flags)
- || ! bfd_set_section_alignment (abfd, s,
- get_elf_backend_data (abfd)->s->log_file_align))
- return FALSE;
- htab->srelplt2 = s;
- }
+ if (htab->is_vxworks
+ && !elf_vxworks_create_dynamic_sections (abfd, info, &htab->srelplt2))
+ return FALSE;
htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
abort ();
flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
+ if (htab->plt_type == PLT_VXWORKS)
+ /* The VxWorks PLT is a loaded section with contents. */
+ flags |= SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
return bfd_set_section_flags (abfd, s, flags);
}
/* Copy the extra info we tack onto an elf_link_hash_entry. */
static void
-ppc_elf_copy_indirect_symbol (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
+ppc_elf_copy_indirect_symbol (struct bfd_link_info *info,
struct elf_link_hash_entry *dir,
struct elf_link_hash_entry *ind)
{
struct ppc_elf_link_hash_entry *edir, *eind;
- bfd_signed_vma tmp;
edir = (struct ppc_elf_link_hash_entry *) dir;
eind = (struct ppc_elf_link_hash_entry *) ind;
struct ppc_elf_dyn_relocs **pp;
struct ppc_elf_dyn_relocs *p;
- if (ind->root.type == bfd_link_hash_indirect)
- abort ();
-
- /* Add reloc counts against the weak sym to the strong sym
+ /* Add reloc counts against the indirect sym to the direct sym
list. Merge any entries against the same section. */
for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
{
/* Copy over the GOT refcount entries that we may have already seen to
the symbol which just became indirect. */
- tmp = edir->elf.got.refcount;
- if (tmp < 1)
- {
- edir->elf.got.refcount = eind->elf.got.refcount;
- eind->elf.got.refcount = tmp;
- }
- else
- BFD_ASSERT (eind->elf.got.refcount < 1);
+ edir->elf.got.refcount += eind->elf.got.refcount;
+ eind->elf.got.refcount = 0;
/* And plt entries. */
if (eind->elf.plt.plist != NULL)
eind->elf.plt.plist = NULL;
}
- if (edir->elf.dynindx == -1)
+ if (eind->elf.dynindx != -1)
{
+ if (edir->elf.dynindx != -1)
+ _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
+ edir->elf.dynstr_index);
edir->elf.dynindx = eind->elf.dynindx;
edir->elf.dynstr_index = eind->elf.dynstr_index;
eind->elf.dynindx = -1;
eind->elf.dynstr_index = 0;
}
- else
- BFD_ASSERT (eind->elf.dynindx == -1);
}
/* Return 1 if target is one of ours. */
is_ppc_elf_target (const struct bfd_target *targ)
{
extern const bfd_target bfd_elf32_powerpc_vec;
+ extern const bfd_target bfd_elf32_powerpc_vxworks_vec;
extern const bfd_target bfd_elf32_powerpcle_vec;
- return targ == &bfd_elf32_powerpc_vec || targ == &bfd_elf32_powerpcle_vec;
+ return (targ == &bfd_elf32_powerpc_vec
+ || targ == &bfd_elf32_powerpc_vxworks_vec
+ || targ == &bfd_elf32_powerpcle_vec);
}
/* Hook called by the linker routine which adds symbols from an object
return TRUE;
}
\f
+static bfd_boolean
+create_sdata_sym (struct ppc_elf_link_hash_table *htab,
+ elf_linker_section_t *lsect)
+{
+ lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
+ TRUE, FALSE, TRUE);
+ if (lsect->sym == NULL)
+ return FALSE;
+ if (lsect->sym->root.type == bfd_link_hash_new)
+ lsect->sym->non_elf = 0;
+ lsect->sym->ref_regular = 1;
+ return TRUE;
+}
+
/* Create a special linker section. */
static bfd_boolean
return FALSE;
lsect->section = s;
- return TRUE;
+ return create_sdata_sym (htab, lsect);
}
/* Find a linker generated pointer with a given addend and type. */
if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
h, rel))
return FALSE;
+ if (h != NULL)
+ {
+ ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
+ h->non_got_ref = TRUE;
+ }
break;
/* Indirect .sdata2 relocation. */
if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
h, rel))
return FALSE;
+ if (h != NULL)
+ {
+ ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
+ h->non_got_ref = TRUE;
+ }
break;
case R_PPC_SDAREL16:
+ if (info->shared)
+ {
+ bad_shared_reloc (abfd, r_type);
+ return FALSE;
+ }
+ if (htab->sdata[0].sym == NULL
+ && !create_sdata_sym (htab, &htab->sdata[0]))
+ return FALSE;
+ if (h != NULL)
+ {
+ ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
+ h->non_got_ref = TRUE;
+ }
+ break;
+
case R_PPC_EMB_SDA2REL:
+ if (info->shared)
+ {
+ bad_shared_reloc (abfd, r_type);
+ return FALSE;
+ }
+ if (htab->sdata[1].sym == NULL
+ && !create_sdata_sym (htab, &htab->sdata[1]))
+ return FALSE;
+ if (h != NULL)
+ {
+ ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
+ h->non_got_ref = TRUE;
+ }
+ break;
+
case R_PPC_EMB_SDA21:
case R_PPC_EMB_RELSDA:
+ if (info->shared)
+ {
+ bad_shared_reloc (abfd, r_type);
+ return FALSE;
+ }
+ if (htab->sdata[0].sym == NULL
+ && !create_sdata_sym (htab, &htab->sdata[0]))
+ return FALSE;
+ if (htab->sdata[1].sym == NULL
+ && !create_sdata_sym (htab, &htab->sdata[1]))
+ return FALSE;
+ if (h != NULL)
+ {
+ ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
+ h->non_got_ref = TRUE;
+ }
+ break;
+
case R_PPC_EMB_NADDR32:
case R_PPC_EMB_NADDR16:
case R_PPC_EMB_NADDR16_LO:
return FALSE;
}
if (h != NULL)
- {
- ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
- /* We may need a copy reloc. */
- h->non_got_ref = TRUE;
- }
+ h->non_got_ref = TRUE;
break;
case R_PPC_PLT32:
case R_PPC_REL16_LO:
case R_PPC_REL16_HI:
case R_PPC_REL16_HA:
- htab->new_plt = 1;
+ htab->can_use_new_plt = 1;
break;
/* These are just markers. */
/* This refers only to functions defined in the shared library. */
case R_PPC_LOCAL24PC:
- if (h && h == htab->elf.hgot)
- htab->old_plt = 1;
+ if (h && h == htab->elf.hgot && htab->plt_type == PLT_UNSET)
+ htab->plt_type = PLT_OLD;
break;
/* This relocation describes the C++ object vtable hierarchy.
&& got2 != NULL
&& (sec->flags & SEC_CODE) != 0
&& (info->shared || info->pie)
- && !htab->old_plt)
+ && htab->plt_type == PLT_UNSET)
{
/* Old -fPIC gcc code has .long LCTOC1-LCFx just before
the start of a function, which assembles to a REL32
s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
r_symndx);
if (s == got2)
- htab->old_plt = 1;
+ htab->plt_type = PLT_OLD;
}
- /* fall through */
+ if (h == NULL || h == htab->elf.hgot)
+ break;
+ goto dodyn1;
case R_PPC_REL24:
case R_PPC_REL14:
break;
if (h == htab->elf.hgot)
{
- htab->old_plt = 1;
+ if (htab->plt_type == PLT_UNSET)
+ htab->plt_type = PLT_OLD;
break;
}
/* fall through */
case R_PPC_ADDR14_BRNTAKEN:
case R_PPC_UADDR32:
case R_PPC_UADDR16:
+ dodyn1:
if (h != NULL && !info->shared)
{
/* We may need a plt entry if the symbol turns out to be
easily. Oh well. */
asection *s;
+ void *vpp;
+
s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
sec, r_symndx);
if (s == NULL)
return FALSE;
- head = ((struct ppc_elf_dyn_relocs **)
- &elf_section_data (s)->local_dynrel);
+ vpp = &elf_section_data (s)->local_dynrel;
+ head = (struct ppc_elf_dyn_relocs **) vpp;
}
p = *head;
int
ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
struct bfd_link_info *info,
- int force_old_plt)
+ int force_old_plt,
+ int emit_stub_syms)
{
struct ppc_elf_link_hash_table *htab;
flagword flags;
htab = ppc_elf_hash_table (info);
- if (force_old_plt || !htab->new_plt)
- htab->old_plt = 1;
- if (htab->is_vxworks)
- {
- /* The VxWorks PLT is a loaded section with contents. */
- flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED
- | SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
+ if (htab->plt_type == PLT_UNSET)
+ htab->plt_type = (force_old_plt || !htab->can_use_new_plt
+ ? PLT_OLD : PLT_NEW);
- if (htab->plt != NULL
- && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
- return -1;
- }
- else if (!htab->old_plt)
+ htab->emit_stub_syms = emit_stub_syms;
+
+ BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
+
+ if (htab->plt_type == PLT_NEW)
{
flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
| SEC_IN_MEMORY | SEC_LINKER_CREATED);
&& !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
return -1;
}
- return !htab->old_plt;
+ return htab->plt_type == PLT_NEW;
}
\f
/* Return the section that should be marked against GC for a given
case R_PPC_ADDR14_BRNTAKEN:
case R_PPC_UADDR32:
case R_PPC_UADDR16:
+ if (info->shared)
+ break;
+
case R_PPC_PLT32:
case R_PPC_PLTREL24:
+ case R_PPC_PLTREL32:
case R_PPC_PLT16_LO:
case R_PPC_PLT16_HI:
case R_PPC_PLT16_HA:
struct ppc_elf_link_hash_table *htab;
htab = ppc_elf_hash_table (info);
- if (!htab->old_plt
+ if (htab->plt_type == PLT_NEW
&& htab->plt != NULL
&& htab->plt->output_section != NULL)
{
/* This is a reference to a symbol defined by a dynamic object which
is not a function. */
- /* First, a fudge for old shared libs that export some symbols they
- should not. */
- if (!h->def_regular
- && (strcmp (h->root.root.string, "_SDA_BASE_") == 0
- || strcmp (h->root.root.string, "_SDA2_BASE_") == 0))
- {
- /* These symbols will be defined later, as if they were defined in
- a linker script. We don't want to use a definition in a shared
- object. */
- const struct elf_backend_data *bed;
-
- bed = get_elf_backend_data (htab->elf.dynobj);
- (*bed->elf_backend_hide_symbol) (info, h, TRUE);
- h->root.type = bfd_link_hash_undefined;
- h->root.u.undef.abfd = htab->elf.dynobj;
- return TRUE;
- }
-
/* If we are creating a shared library, we must presume that the
only references to the symbol are via the global offset table.
For such cases we need not do anything here; the relocations will
}
}
+ if (h->size == 0)
+ {
+ (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
+ h->root.root.string);
+ return TRUE;
+ }
+
/* We must allocate the symbol in our .dynbss section, which will
become part of the .bss section of the executable. There will be
an entry for this symbol in the .dynsym section. The dynamic
return TRUE;
}
\f
+/* Generate a symbol to mark plt call stubs. For non-PIC code the sym is
+ xxxxxxxx.plt_call32.<callee> where xxxxxxxx is a hex number, usually 0,
+ specifying the addend on the plt relocation. For -fpic code, the sym
+ is xxxxxxxx.plt_pic32.<callee>, and for -fPIC
+ xxxxxxxx.got2.plt_pic32.<callee>. */
+
+static bfd_boolean
+add_stub_sym (struct plt_entry *ent,
+ struct elf_link_hash_entry *h,
+ struct bfd_link_info *info)
+{
+ struct elf_link_hash_entry *sh;
+ size_t len1, len2, len3;
+ char *name;
+ const char *stub;
+ struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
+
+ if (info->shared || info->pie)
+ stub = ".plt_pic32.";
+ else
+ stub = ".plt_call32.";
+
+ len1 = strlen (h->root.root.string);
+ len2 = strlen (stub);
+ len3 = 0;
+ if (ent->sec)
+ len3 = strlen (ent->sec->name);
+ name = bfd_malloc (len1 + len2 + len3 + 9);
+ if (name == NULL)
+ return FALSE;
+ sprintf (name, "%08x", (unsigned) ent->addend & 0xffffffff);
+ if (ent->sec)
+ memcpy (name + 8, ent->sec->name, len3);
+ memcpy (name + 8 + len3, stub, len2);
+ memcpy (name + 8 + len3 + len2, h->root.root.string, len1 + 1);
+ sh = elf_link_hash_lookup (&htab->elf, name, TRUE, FALSE, FALSE);
+ if (sh == NULL)
+ return FALSE;
+ if (sh->root.type == bfd_link_hash_new)
+ {
+ sh->root.type = bfd_link_hash_defined;
+ sh->root.u.def.section = htab->glink;
+ sh->root.u.def.value = ent->glink_offset;
+ sh->ref_regular = 1;
+ sh->def_regular = 1;
+ sh->ref_regular_nonweak = 1;
+ sh->forced_local = 1;
+ sh->non_elf = 0;
+ }
+ return TRUE;
+}
+
/* Allocate NEED contiguous space in .got, and return the offset.
Handles allocation of the got header when crossing 32k. */
allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
{
bfd_vma where;
- unsigned int max_before_header = 32768;
-
- if (htab->old_plt)
- max_before_header = 32764;
+ unsigned int max_before_header;
- if (htab->is_vxworks)
+ if (htab->plt_type == PLT_VXWORKS)
{
where = htab->got->size;
htab->got->size += need;
}
- else if (need <= htab->got_gap)
- {
- where = max_before_header - htab->got_gap;
- htab->got_gap -= need;
- }
else
{
- if (htab->got->size + need > max_before_header
- && htab->got->size <= max_before_header)
+ max_before_header = htab->plt_type == PLT_NEW ? 32768 : 32764;
+ if (need <= htab->got_gap)
{
- htab->got_gap = max_before_header - htab->got->size;
- htab->got->size = max_before_header + htab->got_header_size;
+ where = max_before_header - htab->got_gap;
+ htab->got_gap -= need;
+ }
+ else
+ {
+ if (htab->got->size + need > max_before_header
+ && htab->got->size <= max_before_header)
+ {
+ htab->got_gap = max_before_header - htab->got->size;
+ htab->got->size = max_before_header + htab->got_header_size;
+ }
+ where = htab->got->size;
+ htab->got->size += need;
}
- where = htab->got->size;
- htab->got->size += need;
}
return where;
}
{
asection *s = htab->plt;
- if (!(htab->old_plt || htab->is_vxworks))
+ if (htab->plt_type == PLT_NEW)
{
if (!doneone)
{
h->root.u.def.value = glink_offset;
}
ent->glink_offset = glink_offset;
+
+ if (htab->emit_stub_syms
+ && !add_stub_sym (ent, h, info))
+ return FALSE;
}
else
{
s->size += htab->plt_entry_size;
/* After the 8192nd entry, room for two entries
is allocated. */
- if (!htab->is_vxworks
+ if (htab->plt_type == PLT_OLD
&& (s->size - htab->plt_initial_entry_size)
/ htab->plt_entry_size
> PLT_NUM_SINGLE_ENTRIES)
{
htab->relplt->size += sizeof (Elf32_External_Rela);
- if (htab->is_vxworks)
+ if (htab->plt_type == PLT_VXWORKS)
{
/* Allocate space for the unloaded relocations. */
if (!info->shared)
/* Also discard relocs on undefined weak syms with non-default
visibility. */
- if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
+ if (eh->dyn_relocs != NULL
&& h->root.type == bfd_link_hash_undefweak)
- eh->dyn_relocs = NULL;
-
- /* Make sure undefined weak symbols are output as a dynamic symbol
- in PIEs. */
- if (info->pie
- && eh->dyn_relocs != NULL
- && h->dynindx == -1
- && h->root.type == bfd_link_hash_undefweak
- && !h->forced_local)
{
- if (! bfd_elf_link_record_dynamic_symbol (info, h))
- return FALSE;
+ if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
+ eh->dyn_relocs = NULL;
+
+ /* Make sure undefined weak symbols are output as a dynamic
+ symbol in PIEs. */
+ else if (h->dynindx == -1
+ && !h->forced_local)
+ {
+ if (! bfd_elf_link_record_dynamic_symbol (info, h))
+ return FALSE;
+ }
}
}
else if (ELIMINATE_COPY_RELOCS)
}
}
- if (htab->old_plt)
+ if (htab->plt_type == PLT_OLD)
htab->got_header_size = 16;
- else
+ else if (htab->plt_type == PLT_NEW)
htab->got_header_size = 12;
/* Set up .got offsets for local syms, and space for local dynamic
else
htab->tlsld_got.offset = (bfd_vma) -1;
- if (htab->is_vxworks)
- {
- /* Save the GOT and PLT symbols in the hash table for easy access.
- Mark them as having relocations; they might not, but we won't
- know for sure until we build the GOT in finish_dynamic_symbol. */
-
- htab->hgot = elf_link_hash_lookup (elf_hash_table (info),
- "_GLOBAL_OFFSET_TABLE_",
- FALSE, FALSE, FALSE);
- if (htab->hgot)
- htab->hgot->indx = -2;
- htab->hplt = elf_link_hash_lookup (elf_hash_table (info),
- "_PROCEDURE_LINKAGE_TABLE_",
- FALSE, FALSE, FALSE);
- if (htab->hplt)
- htab->hplt->indx = -2;
- /* If the PLT is executable then give the symbol function type. */
- if (htab->hplt && htab->plt->flags & SEC_CODE)
- htab->hplt->type = STT_FUNC;
- }
-
/* Allocate space for global sym dynamic relocs. */
elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
- if (htab->got != NULL && !htab->is_vxworks)
+ if (htab->got != NULL && htab->plt_type != PLT_VXWORKS)
{
unsigned int g_o_t = 32768;
- /* If we haven't allocated the header, do so now. */
+ /* If we haven't allocated the header, do so now. When we get here,
+ for old plt/got the got size will be 0 to 32764 (not allocated),
+ or 32780 to 65536 (header allocated). For new plt/got, the
+ corresponding ranges are 0 to 32768 and 32780 to 65536. */
if (htab->got->size <= 32768)
{
g_o_t = htab->got->size;
+ if (htab->plt_type == PLT_OLD)
+ g_o_t += 4;
htab->got->size += htab->got_header_size;
}
- if (htab->old_plt && !htab->is_vxworks)
- g_o_t += 4;
htab->elf.hgot->root.u.def.value = g_o_t;
}
/* Pad out to align the start of PLTresolve. */
htab->glink->size += -htab->glink->size & 15;
htab->glink->size += GLINK_PLTRESOLVE;
+
+ if (htab->emit_stub_syms)
+ {
+ struct elf_link_hash_entry *sh;
+ sh = elf_link_hash_lookup (&htab->elf, "__glink",
+ TRUE, FALSE, FALSE);
+ if (sh == NULL)
+ return FALSE;
+ if (sh->root.type == bfd_link_hash_new)
+ {
+ sh->root.type = bfd_link_hash_defined;
+ sh->root.u.def.section = htab->glink;
+ sh->root.u.def.value = htab->glink_pltresolve;
+ sh->ref_regular = 1;
+ sh->def_regular = 1;
+ sh->ref_regular_nonweak = 1;
+ sh->forced_local = 1;
+ sh->non_elf = 0;
+ }
+ sh = elf_link_hash_lookup (&htab->elf, "__glink_PLTresolve",
+ TRUE, FALSE, FALSE);
+ if (sh == NULL)
+ return FALSE;
+ if (sh->root.type == bfd_link_hash_new)
+ {
+ sh->root.type = bfd_link_hash_defined;
+ sh->root.u.def.section = htab->glink;
+ sh->root.u.def.value = htab->glink->size - GLINK_PLTRESOLVE;
+ sh->ref_regular = 1;
+ sh->def_regular = 1;
+ sh->ref_regular_nonweak = 1;
+ sh->forced_local = 1;
+ sh->non_elf = 0;
+ }
+ }
}
/* We've now determined the sizes of the various dynamic sections.
/* We'd like to strip these sections if they aren't needed, but if
we've exported dynamic symbols from them we must leave them.
It's too late to tell BFD to get rid of the symbols. */
- if ((s == htab->plt || s == htab->got) && htab->hplt != NULL)
+ if ((s == htab->plt || s == htab->got) && htab->elf.hplt != NULL)
strip_section = FALSE;
/* Strip this section if we don't need it; see the
comment below. */
if (ent != NULL)
{
- if (!htab->old_plt)
+ if (htab->plt_type == PLT_NEW)
{
tsec = htab->glink;
toff = ent->glink_offset;
else if (r_type != R_PPC_PLTREL24)
toff += irel->r_addend;
+ /* Attempted -shared link of non-pic code loses. */
+ if (tsec->output_section == NULL)
+ continue;
+
symaddr = tsec->output_section->vma + tsec->output_offset + toff;
roff = irel->r_offset;
return FALSE;
}
\f
-/* Set _SDA_BASE_, _SDA2_BASE, and sbss start and end syms. They are
- set here rather than via PROVIDE in the default linker script,
- because using PROVIDE inside an output section statement results in
- unnecessary output sections. Using PROVIDE outside an output section
- statement runs the risk of section alignment affecting where the
- section starts. */
-
-void
-ppc_elf_set_sdata_syms (bfd *obfd, struct bfd_link_info *info)
-{
- struct ppc_elf_link_hash_table *htab;
- unsigned i;
- asection *s;
- bfd_vma val;
-
- htab = ppc_elf_hash_table (info);
+/* What to do when ld finds relocations against symbols defined in
+ discarded sections. */
- for (i = 0; i < 2; i++)
- {
- elf_linker_section_t *lsect = &htab->sdata[i];
+static unsigned int
+ppc_elf_action_discarded (asection *sec)
+{
+ if (strcmp (".fixup", sec->name) == 0)
+ return 0;
- s = lsect->section;
- if (s != NULL)
- s = s->output_section;
- if (s == NULL)
- s = bfd_get_section_by_name (obfd, lsect->name);
- if (s == NULL)
- s = bfd_get_section_by_name (obfd, lsect->bss_name);
+ if (strcmp (".got2", sec->name) == 0)
+ return 0;
- if (s)
- {
- /* VxWorks executables are relocatable, so the sdata base symbols
- must be section-relative. */
- val = 32768;
- lsect->sym_val = val + s->vma;
- }
- else
- {
- val = 0;
- lsect->sym_val = 0;
- }
-
- _bfd_elf_provide_symbol (info, lsect->sym_name, val, s);
- }
+ return _bfd_elf_default_action_discarded (sec);
}
\f
/* Fill in the address for a pointer generated in a linker section. */
insn1 |= 32 << 26; /* lwz */
insn2 = 0x7c631214; /* add 3,3,2 */
rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
+ rel[1].r_addend = 0;
r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
+ R_PPC_GOT_TPREL16);
rel->r_info = ELF32_R_INFO (r_symndx, r_type);
/* Was an LD reloc. */
r_symndx = 0;
rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
- rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
}
r_type = R_PPC_TPREL16_HA;
rel->r_info = ELF32_R_INFO (r_symndx, r_type);
rel[1].r_info = ELF32_R_INFO (r_symndx,
R_PPC_TPREL16_LO);
rel[1].r_offset += 2;
+ rel[1].r_addend = rel->r_addend;
}
bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
bfd_put_32 (output_bfd, insn2, contents + offset);
BFD_ASSERT (indx > 0);
#ifdef DEBUG
if (indx <= 0)
- printf ("indx=%d section=%s flags=%08x name=%s\n",
+ printf ("indx=%ld section=%s flags=%08x name=%s\n",
indx, osec->name, osec->flags,
h->root.root.string);
#endif
{
struct plt_entry *ent = find_plt_ent (h, got2, addend);
- if (!htab->old_plt)
+ if (htab->plt_type == PLT_NEW)
relocation = (htab->glink->output_section->vma
+ htab->glink->output_offset
+ ent->glink_offset);
}
unresolved_reloc = FALSE;
- if (!htab->old_plt)
+ if (htab->plt_type == PLT_NEW)
relocation = (htab->glink->output_section->vma
+ htab->glink->output_offset
+ ent->glink_offset);
case R_PPC_SDAREL16:
{
const char *name;
+ struct elf_link_hash_entry *sh;
BFD_ASSERT (sec != NULL);
name = bfd_get_section_name (abfd, sec->output_section);
howto->name,
name);
}
- addend -= htab->sdata[0].sym_val;
+ sh = htab->sdata[0].sym;
+ addend -= (sh->root.u.def.value
+ + sh->root.u.def.section->output_offset
+ + sh->root.u.def.section->output_section->vma);
}
break;
case R_PPC_EMB_SDA2REL:
{
const char *name;
+ struct elf_link_hash_entry *sh;
BFD_ASSERT (sec != NULL);
name = bfd_get_section_name (abfd, sec->output_section);
ret = FALSE;
continue;
}
- addend -= htab->sdata[1].sym_val;
+ sh = htab->sdata[1].sym;
+ addend -= (sh->root.u.def.value
+ + sh->root.u.def.section->output_offset
+ + sh->root.u.def.section->output_section->vma);
}
break;
{
const char *name;
int reg;
+ struct elf_link_hash_entry *sh;
BFD_ASSERT (sec != NULL);
name = bfd_get_section_name (abfd, sec->output_section);
&& (name[5] == 0 || name[5] == '.'))))
{
reg = 13;
- addend -= htab->sdata[0].sym_val;
+ sh = htab->sdata[0].sym;
+ addend -= (sh->root.u.def.value
+ + sh->root.u.def.section->output_offset
+ + sh->root.u.def.section->output_section->vma);
}
else if (strncmp (name, ".sdata2", 7) == 0
|| strncmp (name, ".sbss2", 6) == 0)
{
reg = 2;
- addend -= htab->sdata[1].sym_val;
+ sh = htab->sdata[1].sym;
+ addend -= (sh->root.u.def.value
+ + sh->root.u.def.section->output_offset
+ + sh->root.u.def.section->output_section->vma);
}
else if (strcmp (name, ".PPC.EMB.sdata0") == 0
bfd_byte *loc;
bfd_vma reloc_index;
- if (!(htab->old_plt || htab->is_vxworks))
+ if (htab->plt_type == PLT_NEW)
reloc_index = ent->plt.offset / 4;
else
{
reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
/ htab->plt_slot_size);
if (reloc_index > PLT_NUM_SINGLE_ENTRIES
- && !htab->is_vxworks)
+ && htab->plt_type == PLT_OLD)
reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
}
/* This symbol has an entry in the procedure linkage table.
Set it up. */
- if (htab->is_vxworks)
+ if (htab->plt_type == PLT_VXWORKS)
{
bfd_vma got_offset;
const bfd_vma *plt_entry;
}
else
{
- bfd_vma got_loc = (got_offset
- + htab->hgot->root.u.def.value
- + htab->hgot->root.u.def.section->output_offset
- + htab->hgot->root.u.def.section->output_section->vma);
+ bfd_vma got_loc
+ = (got_offset
+ + htab->elf.hgot->root.u.def.value
+ + htab->elf.hgot->root.u.def.section->output_offset
+ + htab->elf.hgot->root.u.def.section->output_section->vma);
bfd_vma got_loc_hi = (got_loc >> 16)
+ ((got_loc & 0x8000) >> 15);
rela.r_offset = (htab->plt->output_section->vma
+ htab->plt->output_offset
+ ent->plt.offset + 2);
- rela.r_info = ELF32_R_INFO (htab->hgot->indx,
+ rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
R_PPC_ADDR16_HA);
rela.r_addend = got_offset;
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
rela.r_offset = (htab->plt->output_section->vma
+ htab->plt->output_offset
+ ent->plt.offset + 6);
- rela.r_info = ELF32_R_INFO (htab->hgot->indx,
+ rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx,
R_PPC_ADDR16_LO);
rela.r_addend = got_offset;
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
rela.r_offset = (htab->sgotplt->output_section->vma
+ htab->sgotplt->output_offset
+ got_offset);
- rela.r_info = ELF32_R_INFO (htab->hplt->indx,
+ rela.r_info = ELF32_R_INFO (htab->elf.hplt->indx,
R_PPC_ADDR32);
rela.r_addend = ent->plt.offset + 16;
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
rela.r_offset = (htab->plt->output_section->vma
+ htab->plt->output_offset
+ ent->plt.offset);
- if (htab->old_plt)
+ if (htab->plt_type == PLT_OLD)
{
/* We don't need to fill in the .plt. The ppc dynamic
linker will fill it in. */
doneone = TRUE;
}
- if (!htab->old_plt)
+ if (htab->plt_type == PLT_NEW)
{
bfd_vma plt;
unsigned char *p;
unsigned char *p = htab->got->contents;
bfd_vma val;
- p += elf_hash_table (info)->hgot->root.u.def.value;
- if (htab->old_plt && !htab->is_vxworks)
+ p += htab->elf.hgot->root.u.def.value;
+ if (htab->plt_type == PLT_OLD)
bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
val = 0;
if (!info->shared)
{
bfd_vma got_value =
- (htab->hgot->root.u.def.section->output_section->vma
- + htab->hgot->root.u.def.section->output_offset
- + htab->hgot->root.u.def.value);
+ (htab->elf.hgot->root.u.def.section->output_section->vma
+ + htab->elf.hgot->root.u.def.section->output_offset
+ + htab->elf.hgot->root.u.def.value);
bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
rela.r_offset = (htab->plt->output_section->vma
+ htab->plt->output_offset
+ 2);
- rela.r_info = ELF32_R_INFO (htab->hgot->indx, R_PPC_ADDR16_HA);
+ rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
rela.r_addend = 0;
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
loc += sizeof (Elf32_External_Rela);
rela.r_offset = (htab->plt->output_section->vma
+ htab->plt->output_offset
+ 6);
- rela.r_info = ELF32_R_INFO (htab->hgot->indx, R_PPC_ADDR16_LO);
+ rela.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
rela.r_addend = 0;
bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
loc += sizeof (Elf32_External_Rela);
Elf_Internal_Rela rel;
bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
- rel.r_info = ELF32_R_INFO (htab->hgot->indx, R_PPC_ADDR16_HA);
+ rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_HA);
bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
loc += sizeof (Elf32_External_Rela);
bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
- rel.r_info = ELF32_R_INFO (htab->hgot->indx, R_PPC_ADDR16_LO);
+ rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_PPC_ADDR16_LO);
bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
loc += sizeof (Elf32_External_Rela);
bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
- rel.r_info = ELF32_R_INFO (htab->hplt->indx, R_PPC_ADDR32);
+ rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_PPC_ADDR32);
bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
loc += sizeof (Elf32_External_Rela);
}
#define ELF_MAXPAGESIZE 0x10000
#endif
#define ELF_MINPAGESIZE 0x1000
+#define ELF_COMMONPAGESIZE 0x1000
#define elf_info_to_howto ppc_elf_info_to_howto
#ifdef EM_CYGNUS_POWERPC
#define elf_backend_write_section ppc_elf_write_section
#define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
#define elf_backend_plt_sym_val ppc_elf_plt_sym_val
+#define elf_backend_action_discarded ppc_elf_action_discarded
#include "elf32-target.h"
struct ppc_elf_link_hash_table *htab
= (struct ppc_elf_link_hash_table *)ret;
htab->is_vxworks = 1;
+ htab->plt_type = PLT_VXWORKS;
htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
}
-/* Tweak magic VxWorks symbols as they are written to the output file. */
-static bfd_boolean
-elf_i386_vxworks_link_output_symbol_hook (struct bfd_link_info *info
- ATTRIBUTE_UNUSED,
- const char *name,
- Elf_Internal_Sym *sym,
- asection *input_sec ATTRIBUTE_UNUSED,
- struct elf_link_hash_entry *h
- ATTRIBUTE_UNUSED)
-{
- /* Ignore the first dummy symbol. */
- if (!name)
- return TRUE;
-
- return elf_vxworks_link_output_symbol_hook (name, sym);
-}
-
static void
ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
{
ppc_elf_vxworks_add_symbol_hook
#undef elf_backend_link_output_symbol_hook
#define elf_backend_link_output_symbol_hook \
- elf_i386_vxworks_link_output_symbol_hook
+ elf_vxworks_link_output_symbol_hook
#undef elf_backend_final_write_processing
#define elf_backend_final_write_processing \
ppc_elf_vxworks_final_write_processing