/* For new-style .glink and .plt. */
#define GLINK_PLTRESOLVE 16*4
#define GLINK_ENTRY_SIZE 4*4
+#define TLS_GET_ADDR_GLINK_SIZE 12*4
/* VxWorks uses its own plt layout, filled in by the static linker. */
#define ADDIS_12_12 0x3d8c0000
#define ADDI_11_11 0x396b0000
#define ADD_0_11_11 0x7c0b5a14
+#define ADD_3_12_2 0x7c6c1214
#define ADD_11_0_11 0x7d605a14
#define B 0x48000000
#define BCL_20_31 0x429f0005
#define BCTR 0x4e800420
+#define BEQLR 0x4d820020
+#define CMPWI_11_0 0x2c0b0000
#define LIS_11 0x3d600000
#define LIS_12 0x3d800000
#define LWZU_0_12 0x840c0000
#define LWZ_0_12 0x800c0000
+#define LWZ_11_3 0x81630000
#define LWZ_11_11 0x816b0000
#define LWZ_11_30 0x817e0000
+#define LWZ_12_3 0x81830000
#define LWZ_12_12 0x818c0000
+#define MR_0_3 0x7c601b78
+#define MR_3_0 0x7c030378
#define MFLR_0 0x7c0802a6
#define MFLR_12 0x7d8802a6
#define MTCTR_0 0x7c0903a6
16, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
+ complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC_EMB_SDAI16", /* name */
FALSE, /* partial_inplace */
16, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
- complain_overflow_bitfield, /* complain_on_overflow */
+ complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
"R_PPC_EMB_SDA2I16", /* name */
FALSE, /* partial_inplace */
};
/* Track PLT entries needed for a given symbol. We might need more
- than one glink entry per symbol. */
+ than one glink entry per symbol when generating a pic binary. */
struct plt_entry
{
struct plt_entry *next;
/* -fPIC uses multiple GOT sections, one per file, called ".got2".
This field stores the offset into .got2 used to initialise the
- GOT pointer reg. It will always be at least 32768 (and for
- current gcc this is the only offset used). */
+ GOT pointer reg. It will always be at least 32768. (Current
+ gcc always uses an offset of 32768, but ld -r will pack .got2
+ sections together resulting in larger offsets). */
bfd_vma addend;
/* The .got2 section. */
/* Set if we should emit symbols for stubs. */
unsigned int emit_stub_syms:1;
+ /* Set if __tls_get_addr optimization should not be done. */
+ unsigned int no_tls_get_addr_opt:1;
+
/* True if the target system is VxWorks. */
unsigned int is_vxworks:1;
}
\f
static bfd_boolean
-create_sdata_sym (struct ppc_elf_link_hash_table *htab,
- elf_linker_section_t *lsect)
+create_sdata_sym (struct bfd_link_info *info, elf_linker_section_t *lsect)
{
+ struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
+
lsect->sym = elf_link_hash_lookup (&htab->elf, lsect->sym_name,
TRUE, FALSE, TRUE);
if (lsect->sym == NULL)
if (lsect->sym->root.type == bfd_link_hash_new)
lsect->sym->non_elf = 0;
lsect->sym->ref_regular = 1;
+ _bfd_elf_link_hash_hide_symbol (info, lsect->sym, TRUE);
return TRUE;
}
return FALSE;
lsect->section = s;
- return create_sdata_sym (htab, lsect);
+ return create_sdata_sym (info, lsect);
}
/* Find a linker generated pointer with a given addend and type. */
tls_type = 0;
ifunc = NULL;
+ r_type = ELF32_R_TYPE (rel->r_info);
if (!htab->is_vxworks)
{
if (h != NULL)
{
if (h->type == STT_GNU_IFUNC)
- {
- h->needs_plt = 1;
- ifunc = &h->plt.plist;
- }
+ ifunc = &h->plt.plist;
}
else
{
if (isym == NULL)
return FALSE;
- if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
+ if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
+ && (!info->shared
+ || is_branch_reloc (r_type)))
{
+ bfd_vma addend;
+
ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
PLT_IFUNC);
if (ifunc == NULL)
return FALSE;
+
+ /* STT_GNU_IFUNC symbols must have a PLT entry;
+ In a non-pie executable even when there are
+ no plt calls. */
+ addend = 0;
+ if (r_type == R_PPC_PLTREL24)
+ {
+ ppc_elf_tdata (abfd)->makes_plt_call = 1;
+ if (info->shared)
+ addend = rel->r_addend;
+ }
+ if (!update_plt_info (abfd, ifunc,
+ addend < 32768 ? NULL : got2, addend))
+ return FALSE;
}
}
}
- r_type = ELF32_R_TYPE (rel->r_info);
- if (!htab->is_vxworks && is_branch_reloc (r_type))
+ if (!htab->is_vxworks
+ && is_branch_reloc (r_type)
+ && h != NULL
+ && h == tga)
{
- if (h != NULL && h == tga)
- {
- if (rel != relocs
- && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
- || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
- /* We have a new-style __tls_get_addr call with a marker
- reloc. */
- ;
- else
- /* Mark this section as having an old-style call. */
- sec->has_tls_get_addr_call = 1;
- }
-
- /* STT_GNU_IFUNC symbols must have a PLT entry. */
- if (ifunc != NULL)
- {
- bfd_vma addend = 0;
-
- if (r_type == R_PPC_PLTREL24)
- {
- ppc_elf_tdata (abfd)->makes_plt_call = 1;
- addend = rel->r_addend;
- }
- if (!update_plt_info (abfd, ifunc,
- addend < 32768 ? NULL : got2, addend))
- return FALSE;
- }
+ if (rel != relocs
+ && (ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSGD
+ || ELF32_R_TYPE (rel[-1].r_info) == R_PPC_TLSLD))
+ /* We have a new-style __tls_get_addr call with a marker
+ reloc. */
+ ;
+ else
+ /* Mark this section as having an old-style call. */
+ sec->has_tls_get_addr_call = 1;
}
switch (r_type)
/* This is a global offset table entry for a local symbol. */
if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
return FALSE;
+
+ /* We may also need a plt entry if the symbol turns out to be
+ an ifunc. */
+ if (h != NULL && !info->shared)
+ {
+ if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
+ return FALSE;
+ }
break;
/* Indirect .sdata relocation. */
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]))
+ && !create_sdata_sym (info, &htab->sdata[0]))
return FALSE;
if (h != NULL)
{
return FALSE;
}
if (htab->sdata[1].sym == NULL
- && !create_sdata_sym (htab, &htab->sdata[1]))
+ && !create_sdata_sym (info, &htab->sdata[1]))
return FALSE;
if (h != NULL)
{
return FALSE;
}
if (htab->sdata[0].sym == NULL
- && !create_sdata_sym (htab, &htab->sdata[0]))
+ && !create_sdata_sym (info, &htab->sdata[0]))
return FALSE;
if (htab->sdata[1].sym == NULL
- && !create_sdata_sym (htab, &htab->sdata[1]))
+ && !create_sdata_sym (info, &htab->sdata[1]))
return FALSE;
if (h != NULL)
{
break;
case R_PPC_PLTREL24:
- if (h == NULL || ifunc != NULL)
+ if (h == NULL)
break;
/* Fall through */
case R_PPC_PLT32:
if (r_type == R_PPC_PLTREL24)
{
ppc_elf_tdata (abfd)->makes_plt_call = 1;
- addend = rel->r_addend;
+ if (info->shared)
+ addend = rel->r_addend;
}
h->needs_plt = 1;
if (!update_plt_info (abfd, &h->plt.plist,
if (h == NULL
&& got2 != NULL
&& (sec->flags & SEC_CODE) != 0
- && (info->shared || info->pie)
+ && info->shared
&& htab->plt_type == PLT_UNSET)
{
/* Old -fPIC gcc code has .long LCTOC1-LCFx just before
/* We may need a plt entry if the symbol turns out to be
a function defined in a dynamic object. */
h->needs_plt = 1;
- if (ifunc == NULL
- && !update_plt_info (abfd, &h->plt.plist, NULL, 0))
+ if (!update_plt_info (abfd, &h->plt.plist, NULL, 0))
return FALSE;
break;
}
&& !info->shared
&& h != NULL
&& (h->root.type == bfd_link_hash_defweak
- || !h->def_regular))
- || (!info->shared
- && ifunc != NULL))
+ || !h->def_regular)))
{
struct ppc_elf_dyn_relocs *p;
struct ppc_elf_dyn_relocs **head;
htab = ppc_elf_hash_table (info);
+ htab->emit_stub_syms = emit_stub_syms;
+
if (htab->plt_type == PLT_UNSET)
{
if (plt_style == PLT_OLD)
if (htab->plt_type == PLT_OLD && plt_style == PLT_NEW)
info->callbacks->info (_("Using bss-plt due to %B"), htab->old_bfd);
- htab->emit_stub_syms = emit_stub_syms;
-
BFD_ASSERT (htab->plt_type != PLT_VXWORKS);
if (htab->plt_type == PLT_NEW)
}
r_type = ELF32_R_TYPE (rel->r_info);
- if (!htab->is_vxworks && is_branch_reloc (r_type))
+ if (!htab->is_vxworks
+ && h == NULL
+ && local_got_refcounts != NULL
+ && (!info->shared
+ || is_branch_reloc (r_type)))
{
- struct plt_entry **ifunc = NULL;
- if (h != NULL)
+ struct plt_entry **local_plt = (struct plt_entry **)
+ (local_got_refcounts + symtab_hdr->sh_info);
+ char *local_got_tls_masks = (char *)
+ (local_plt + symtab_hdr->sh_info);
+ if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
{
- if (h->type == STT_GNU_IFUNC)
- ifunc = &h->plt.plist;
- }
- else if (local_got_refcounts != NULL)
- {
- struct plt_entry **local_plt = (struct plt_entry **)
- (local_got_refcounts + symtab_hdr->sh_info);
- char *local_got_tls_masks = (char *)
- (local_plt + symtab_hdr->sh_info);
- if ((local_got_tls_masks[r_symndx] & PLT_IFUNC) != 0)
- ifunc = local_plt + r_symndx;
- }
- if (ifunc != NULL)
- {
- bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
- struct plt_entry *ent = find_plt_ent (ifunc, got2, addend);
+ struct plt_entry **ifunc = local_plt + r_symndx;
+ bfd_vma addend = 0;
+ struct plt_entry *ent;
+
+ if (r_type == R_PPC_PLTREL24 && info->shared)
+ addend = rel->r_addend;
+ ent = find_plt_ent (ifunc, got2, addend);
if (ent->plt.refcount > 0)
ent->plt.refcount -= 1;
continue;
{
if (h->got.refcount > 0)
h->got.refcount--;
+ if (!info->shared)
+ {
+ struct plt_entry *ent;
+
+ ent = find_plt_ent (&h->plt.plist, NULL, 0);
+ if (ent->plt.refcount > 0)
+ ent->plt.refcount -= 1;
+ }
}
else if (local_got_refcounts != NULL)
{
case R_PPC_PLT16_HA:
if (h != NULL)
{
- bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
- struct plt_entry *ent = find_plt_ent (&h->plt.plist,
- got2, addend);
+ bfd_vma addend = 0;
+ struct plt_entry *ent;
+
+ if (r_type == R_PPC_PLTREL24 && info->shared)
+ addend = rel->r_addend;
+ ent = find_plt_ent (&h->plt.plist, got2, addend);
if (ent->plt.refcount > 0)
ent->plt.refcount -= 1;
}
generic ELF tls_setup function. */
asection *
-ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
+ppc_elf_tls_setup (bfd *obfd,
+ struct bfd_link_info *info,
+ int no_tls_get_addr_opt)
{
struct ppc_elf_link_hash_table *htab;
htab = ppc_elf_hash_table (info);
+ htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
+ FALSE, FALSE, TRUE);
+ if (!no_tls_get_addr_opt)
+ {
+ struct elf_link_hash_entry *opt, *tga;
+ opt = elf_link_hash_lookup (&htab->elf, "__tls_get_addr_opt",
+ FALSE, FALSE, TRUE);
+ if (opt != NULL
+ && (opt->root.type == bfd_link_hash_defined
+ || opt->root.type == bfd_link_hash_defweak))
+ {
+ /* If glibc supports an optimized __tls_get_addr call stub,
+ signalled by the presence of __tls_get_addr_opt, and we'll
+ be calling __tls_get_addr via a plt call stub, then
+ make __tls_get_addr point to __tls_get_addr_opt. */
+ tga = htab->tls_get_addr;
+ if (htab->elf.dynamic_sections_created
+ && tga != NULL
+ && (tga->type == STT_FUNC
+ || tga->needs_plt)
+ && !(SYMBOL_CALLS_LOCAL (info, tga)
+ || (ELF_ST_VISIBILITY (tga->other) != STV_DEFAULT
+ && tga->root.type == bfd_link_hash_undefweak)))
+ {
+ struct plt_entry *ent;
+ ent = find_plt_ent (&tga->plt.plist, NULL, 0);
+ if (ent != NULL
+ && ent->plt.refcount > 0)
+ {
+ tga->root.type = bfd_link_hash_indirect;
+ tga->root.u.i.link = &opt->root;
+ ppc_elf_copy_indirect_symbol (info, opt, tga);
+ if (opt->dynindx != -1)
+ {
+ /* Use __tls_get_addr_opt in dynamic relocations. */
+ opt->dynindx = -1;
+ _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
+ opt->dynstr_index);
+ if (!bfd_elf_link_record_dynamic_symbol (info, opt))
+ return FALSE;
+ }
+ htab->tls_get_addr = opt;
+ }
+ }
+ }
+ else
+ no_tls_get_addr_opt = TRUE;
+ }
+ htab->no_tls_get_addr_opt = no_tls_get_addr_opt;
if (htab->plt_type == PLT_NEW
&& htab->plt != NULL
&& htab->plt->output_section != NULL)
elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
}
- htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
- FALSE, FALSE, TRUE);
return _bfd_elf_tls_setup (obfd, info);
}
htab = ppc_elf_hash_table (info);
BFD_ASSERT (htab->elf.dynobj != NULL
&& (h->needs_plt
+ || h->type == STT_GNU_IFUNC
|| h->u.weakdef != NULL
|| (h->def_dynamic
&& h->ref_regular
const char *stub;
struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
- if (info->shared || info->pie)
+ if (info->shared)
stub = ".plt_pic32.";
else
stub = ".plt_call32.";
ent->plt.offset = plt_offset;
s = htab->glink;
- if (!doneone || info->shared || info->pie)
+ if (!doneone || info->shared)
{
glink_offset = s->size;
s->size += GLINK_ENTRY_SIZE;
+ if (h == htab->tls_get_addr
+ && !htab->no_tls_get_addr_opt)
+ s->size += TLS_GET_ADDR_GLINK_SIZE - GLINK_ENTRY_SIZE;
}
if (!doneone
&& !info->shared
/* If this symbol is not defined in a regular
file, and we are not generating a shared
- library, then set the symbol to this location
- in the .plt. This is required to make
+ library, then set the symbol to this location
+ in the .plt. This is to avoid text
+ relocations, and is required to make
function pointers compare as equal between
the normal executable and the shared library. */
if (! info->shared
eh->elf.got.offset = (bfd_vma) -1;
else
{
- asection *rsec = NULL;
eh->elf.got.offset = allocate_got (htab, need);
dyn = htab->elf.dynamic_sections_created;
if ((info->shared
|| WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
&& (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
|| eh->elf.root.type != bfd_link_hash_undefweak))
- rsec = htab->relgot;
- else if (h->type == STT_GNU_IFUNC)
- rsec = htab->reliplt;
- if (rsec != NULL)
{
+ asection *rsec = htab->relgot;
/* All the entries we allocated need relocs.
Except LD only needs one. */
if ((eh->tls_mask & TLS_LD) != 0
eh->elf.got.offset = (bfd_vma) -1;
if (eh->dyn_relocs == NULL
- || (!htab->elf.dynamic_sections_created
- && h->type != STT_GNU_IFUNC))
+ || !htab->elf.dynamic_sections_created)
return TRUE;
/* In the shared -Bsymbolic case, discard space allocated for
}
}
}
- else if (h->type == STT_GNU_IFUNC)
- {
- if (!h->non_got_ref)
- eh->dyn_relocs = NULL;
- }
else if (ELIMINATE_COPY_RELOCS)
{
/* For the non-shared case, discard space for relocs against
if (info->shared)
htab->relgot->size += (need
* (sizeof (Elf32_External_Rela) / 4));
- else if ((*lgot_masks & PLT_IFUNC) != 0)
- htab->reliplt->size += (need
- * (sizeof (Elf32_External_Rela) / 4));
}
}
else
ent->plt.offset = plt_offset;
s = htab->glink;
- if (!doneone || info->shared || info->pie)
+ if (!doneone || info->shared)
{
glink_offset = s->size;
s->size += GLINK_ENTRY_SIZE;
htab->elf.hgot->root.u.def.value = g_o_t;
}
+ if (info->shared)
+ {
+ struct elf_link_hash_entry *sda = htab->sdata[0].sym;
+ if (sda != NULL
+ && !(sda->root.type == bfd_link_hash_defined
+ || sda->root.type == bfd_link_hash_defweak))
+ {
+ sda->root.type = bfd_link_hash_defined;
+ sda->root.u.def.section = htab->elf.hgot->root.u.def.section;
+ sda->root.u.def.value = htab->elf.hgot->root.u.def.value;
+ }
+ }
if (htab->glink != NULL
&& htab->glink->size != 0
{
if (!add_dynamic_entry (DT_PPC_GOT, 0))
return FALSE;
+ if (!htab->no_tls_get_addr_opt
+ && htab->tls_get_addr != NULL
+ && htab->tls_get_addr->plt.plist != NULL
+ && !add_dynamic_entry (DT_PPC_TLSOPT, 0))
+ return FALSE;
}
if (relocs)
\f
#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
+/* Relaxation trampolines. r12 is available for clobbering (r11, is
+ used for some functions that are allowed to break the ABI). */
static const int shared_stub_entry[] =
{
0x7c0802a6, /* mflr 0 */
0x429f0005, /* bcl 20, 31, .Lxxx */
- 0x7d6802a6, /* mflr 11 */
- 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
- 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
+ 0x7d8802a6, /* mflr 12 */
+ 0x3d8c0000, /* addis 12, 12, (xxx-.Lxxx)@ha */
+ 0x398c0008, /* addi 12, 12, (xxx-.Lxxx)@l */
0x7c0803a6, /* mtlr 0 */
- 0x7d6903a6, /* mtctr 11 */
+ 0x7d8903a6, /* mtctr 12 */
0x4e800420, /* bctr */
};
static const int stub_entry[] =
{
- 0x3d600000, /* lis 11,xxx@ha */
- 0x396b0000, /* addi 11,11,xxx@l */
- 0x7d6903a6, /* mtctr 11 */
+ 0x3d800000, /* lis 12,xxx@ha */
+ 0x398c0000, /* addi 12,12,xxx@l */
+ 0x7d8903a6, /* mtctr 12 */
0x4e800420, /* bctr */
};
{
struct one_fixup *next;
asection *tsec;
+ /* Final link, can use the symbol offset. For a
+ relocatable link we use the symbol's index. */
bfd_vma toff;
bfd_vma trampoff;
};
*again = FALSE;
/* Nothing to do if there are no relocations, and no need to do
- anything with non-alloc sections. */
+ anything with non-alloc or non-code sections. */
if ((isec->flags & SEC_ALLOC) == 0
+ || (isec->flags & SEC_CODE) == 0
|| (isec->flags & SEC_RELOC) == 0
|| isec->reloc_count == 0)
return TRUE;
for (irel = internal_relocs; irel < irelend; irel++)
{
unsigned long r_type = ELF32_R_TYPE (irel->r_info);
- bfd_vma symaddr, reladdr, toff, roff;
+ bfd_vma reladdr, toff, roff;
asection *tsec;
struct one_fixup *f;
size_t insn_offset = 0;
bfd_vma max_branch_offset, val;
bfd_byte *hit_addr;
unsigned long t0;
+ struct elf_link_hash_entry *h;
+ struct plt_entry **plist;
unsigned char sym_type;
switch (r_type)
}
/* Get the value of the symbol referred to by the reloc. */
+ h = NULL;
if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
{
/* A local symbol. */
{
/* Global symbol handling. */
unsigned long indx;
- struct elf_link_hash_entry *h;
indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
h = elf_sym_hashes (abfd)[indx];
|| h->root.type == bfd_link_hash_warning)
h = (struct elf_link_hash_entry *) h->root.u.i.link;
- tsec = NULL;
- toff = 0;
- if (r_type == R_PPC_PLTREL24
- && htab->plt != NULL)
- {
- struct plt_entry *ent = find_plt_ent (&h->plt.plist,
- got2, irel->r_addend);
-
- if (ent != NULL)
- {
- if (htab->plt_type == PLT_NEW)
- {
- tsec = htab->glink;
- toff = ent->glink_offset;
- }
- else
- {
- tsec = htab->plt;
- toff = ent->plt.offset;
- }
- }
- }
- if (tsec != NULL)
- ;
- else if (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
+ if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
{
tsec = h->root.u.def.section;
toff = h->root.u.def.value;
|| h->root.type == bfd_link_hash_undefweak)
{
tsec = bfd_und_section_ptr;
- toff = 0;
+ toff = link_info->relocatable ? indx : 0;
}
else
continue;
sym_type = h->type;
}
+ /* The condition here under which we call find_plt_ent must
+ match that in relocate_section. If we call find_plt_ent here
+ but not in relocate_section, or vice versa, then the branch
+ destination used here may be incorrect. */
+ plist = NULL;
+ if (h != NULL)
+ {
+ /* We know is_branch_reloc (r_type) is true. */
+ if (h->type == STT_GNU_IFUNC
+ || r_type == R_PPC_PLTREL24)
+ plist = &h->plt.plist;
+ }
+ else if (sym_type == STT_GNU_IFUNC
+ && elf_local_got_offsets (abfd) != NULL)
+ {
+ bfd_vma *local_got_offsets = elf_local_got_offsets (abfd);
+ struct plt_entry **local_plt = (struct plt_entry **)
+ (local_got_offsets + symtab_hdr->sh_info);
+ plist = local_plt + ELF32_R_SYM (irel->r_info);
+ }
+ if (plist != NULL)
+ {
+ bfd_vma addend = 0;
+ struct plt_entry *ent;
+
+ if (r_type == R_PPC_PLTREL24 && link_info->shared)
+ addend = irel->r_addend;
+ ent = find_plt_ent (plist, got2, addend);
+ if (ent != NULL)
+ {
+ if (htab->plt_type == PLT_NEW
+ || h == NULL
+ || !htab->elf.dynamic_sections_created
+ || h->dynindx == -1)
+ {
+ tsec = htab->glink;
+ toff = ent->glink_offset;
+ }
+ else
+ {
+ tsec = htab->plt;
+ toff = ent->plt.offset;
+ }
+ }
+ }
+
/* If the branch and target are in the same section, you have
no hope of adding stubs. We'll error out later should the
branch overflow. */
if (tsec->output_section == NULL)
continue;
- symaddr = tsec->output_section->vma + tsec->output_offset + toff;
-
roff = irel->r_offset;
reladdr = isec->output_section->vma + isec->output_offset + roff;
&& (!link_info->relocatable
/* A relocatable link may have sections moved during
final link, so do not presume they remain in range. */
- || tsec->output_section == isec->output_section)
- && symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
- continue;
+ || tsec->output_section == isec->output_section))
+ {
+ bfd_vma symaddr, reladdr;
+
+ symaddr = tsec->output_section->vma + tsec->output_offset + toff;
+ reladdr = isec->output_section->vma + isec->output_offset + roff;
+ if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
+ continue;
+ }
/* Look for an existing fixup to this address. */
for (f = fixups; f ; f = f->next)
linker_section_ptr->offset += 1;
}
- relocation = (lsect->section->output_offset
+ relocation = (lsect->section->output_section->vma
+ + lsect->section->output_offset
+ linker_section_ptr->offset - 1
- - 0x8000);
+ - SYM_VAL (lsect->sym));
#ifdef DEBUG
fprintf (stderr,
lsect->name, (long) relocation, (long) relocation);
#endif
- /* Subtract out the addend, because it will get added back in by the normal
- processing. */
- return relocation - linker_section_ptr->addend;
+ return relocation;
}
#define PPC_LO(v) ((v) & 0xffff)
#define PPC_HA(v) PPC_HI ((v) + 0x8000)
static void
-write_glink_stub (struct plt_entry *ent, asection *plt_sec,
+write_glink_stub (struct plt_entry *ent, asection *plt_sec, unsigned char *p,
struct bfd_link_info *info)
{
struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
bfd *output_bfd = info->output_bfd;
bfd_vma plt;
- unsigned char *p;
plt = ((ent->plt.offset & ~1)
+ plt_sec->output_section->vma
+ plt_sec->output_offset);
- p = (unsigned char *) htab->glink->contents + ent->glink_offset;
- if (info->shared || info->pie)
+ if (info->shared)
{
bfd_vma got = 0;
}
}
+/* Return true if symbol is defined statically. */
+
+static bfd_boolean
+is_static_defined (struct elf_link_hash_entry *h)
+{
+ return ((h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ && h->root.u.def.section != NULL
+ && h->root.u.def.section->output_section != NULL);
+}
+
/* The RELOCATE_SECTION function is called by the ELF backend linker
to handle the relocations for a section.
ifunc = NULL;
if (!htab->is_vxworks)
{
+ struct plt_entry *ent;
+
if (h != NULL)
{
if (h->type == STT_GNU_IFUNC)
ifunc = &h->plt.plist;
}
- else if (local_got_offsets != NULL)
+ else if (local_got_offsets != NULL
+ && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
{
- if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
- {
- struct plt_entry **local_plt = (struct plt_entry **)
- (local_got_offsets + symtab_hdr->sh_info);
+ struct plt_entry **local_plt;
- ifunc = local_plt + r_symndx;
- }
+ local_plt = (struct plt_entry **) (local_got_offsets
+ + symtab_hdr->sh_info);
+ ifunc = local_plt + r_symndx;
}
- if (ifunc != NULL && is_branch_reloc (r_type))
- {
- struct plt_entry *ent = find_plt_ent (ifunc, got2, rel->r_addend);
+ ent = NULL;
+ if (ifunc != NULL
+ && (!info->shared
+ || is_branch_reloc (r_type)))
+ {
+ addend = 0;
+ if (r_type == R_PPC_PLTREL24 && info->shared)
+ addend = rel->r_addend;
+ ent = find_plt_ent (ifunc, got2, addend);
+ }
+ if (ent != NULL)
+ {
if (h == NULL && (ent->plt.offset & 1) == 0)
{
Elf_Internal_Rela rela;
}
if (h == NULL && (ent->glink_offset & 1) == 0)
{
- write_glink_stub (ent, htab->iplt, info);
+ unsigned char *p = ((unsigned char *) htab->glink->contents
+ + ent->glink_offset);
+ write_glink_stub (ent, htab->iplt, p, info);
ent->glink_offset |= 1;
}
off &= ~1;
else
{
- asection *rsec;
unsigned int tls_m = (tls_mask
& (TLS_LD | TLS_GD | TLS_DTPREL
| TLS_TPREL | TLS_TPRELGD));
}
/* Generate relocs for the dynamic linker. */
- rsec = NULL;
if ((info->shared || indx != 0)
&& (offp == &htab->tlsld_got.offset
|| h == NULL
|| ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
|| h->root.type != bfd_link_hash_undefweak))
- rsec = htab->relgot;
- else if (ifunc != NULL)
- rsec = htab->reliplt;
- if (rsec != NULL)
{
+ asection *rsec = htab->relgot;
+
outrel.r_offset = (htab->got->output_section->vma
+ htab->got->output_offset
+ off);
&& h != NULL
&& h->dynindx != -1
&& !h->non_got_ref
- && !h->def_regular)
- || (!info->shared
- && ifunc != NULL))
+ && !h->def_regular))
{
int skip;
case R_PPC_RELAX32PC_PLT:
case R_PPC_RELAX32_PLT:
- {
- struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2, addend);
-
- if (htab->plt_type == PLT_NEW)
- relocation = (htab->glink->output_section->vma
- + htab->glink->output_offset
- + ent->glink_offset);
- else
- relocation = (htab->plt->output_section->vma
- + htab->plt->output_offset
- + ent->plt.offset);
- }
+ if (h != NULL)
+ {
+ struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
+ info->shared ? addend : 0);
+ if (htab->plt_type == PLT_NEW)
+ relocation = (htab->glink->output_section->vma
+ + htab->glink->output_offset
+ + ent->glink_offset);
+ else
+ relocation = (htab->plt->output_section->vma
+ + htab->plt->output_offset
+ + ent->plt.offset);
+ }
if (r_type == R_PPC_RELAX32_PLT)
goto relax32;
/* Fall thru */
/* Indirect .sdata relocation. */
case R_PPC_EMB_SDAI16:
BFD_ASSERT (htab->sdata[0].section != NULL);
+ if (!is_static_defined (htab->sdata[0].sym))
+ {
+ unresolved_reloc = TRUE;
+ break;
+ }
relocation
= elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
h, relocation, rel);
+ addend = 0;
break;
/* Indirect .sdata2 relocation. */
case R_PPC_EMB_SDA2I16:
BFD_ASSERT (htab->sdata[1].section != NULL);
+ if (!is_static_defined (htab->sdata[1].sym))
+ {
+ unresolved_reloc = TRUE;
+ break;
+ }
relocation
= elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
h, relocation, rel);
+ addend = 0;
break;
/* Handle the TOC16 reloc. We want to use the offset within the .got
/* Relocation is to the entry for this symbol in the
procedure linkage table. */
{
- struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2, addend);
-
+ struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
+ info->shared ? addend : 0);
addend = 0;
if (ent == NULL
|| htab->plt == NULL)
case R_PPC_SDAREL16:
{
const char *name;
+ struct elf_link_hash_entry *sda = htab->sdata[0].sym;
- if (sec == NULL || sec->output_section == NULL)
+ if (sec == NULL
+ || sec->output_section == NULL
+ || !is_static_defined (sda))
{
unresolved_reloc = TRUE;
break;
}
+ addend -= SYM_VAL (sda);
name = bfd_get_section_name (abfd, sec->output_section);
if (! ((CONST_STRNEQ (name, ".sdata")
howto->name,
name);
}
- addend -= SYM_VAL (htab->sdata[0].sym);
}
break;
case R_PPC_EMB_SDA2REL:
{
const char *name;
+ struct elf_link_hash_entry *sda = htab->sdata[1].sym;
- if (sec == NULL || sec->output_section == NULL)
+ if (sec == NULL
+ || sec->output_section == NULL
+ || !is_static_defined (sda))
{
unresolved_reloc = TRUE;
break;
}
+ addend -= SYM_VAL (sda);
name = bfd_get_section_name (abfd, sec->output_section);
if (! (CONST_STRNEQ (name, ".sdata2")
sym_name,
howto->name,
name);
-
- bfd_set_error (bfd_error_bad_value);
- ret = FALSE;
- continue;
}
- addend -= SYM_VAL (htab->sdata[1].sym);
}
break;
{
const char *name;
int reg;
+ struct elf_link_hash_entry *sda = NULL;
if (sec == NULL || sec->output_section == NULL)
{
&& (name[5] == 0 || name[5] == '.'))))
{
reg = 13;
- addend -= SYM_VAL (htab->sdata[0].sym);
+ sda = htab->sdata[0].sym;
}
else if (CONST_STRNEQ (name, ".sdata2")
|| CONST_STRNEQ (name, ".sbss2"))
{
reg = 2;
- addend -= SYM_VAL (htab->sdata[1].sym);
+ sda = htab->sdata[1].sym;
}
else if (strcmp (name, ".PPC.EMB.sdata0") == 0
|| strcmp (name, ".PPC.EMB.sbss0") == 0)
continue;
}
+ if (sda != NULL)
+ {
+ if (!is_static_defined (sda))
+ {
+ unresolved_reloc = TRUE;
+ break;
+ }
+ addend -= SYM_VAL (sda);
+ }
+
if (r_type == R_PPC_EMB_SDA21)
{ /* fill in register field */
insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
sym->st_value = 0;
}
}
+ else if (h->type == STT_GNU_IFUNC
+ && !info->shared)
+ {
+ /* Set the value of ifunc symbols in a non-pie
+ executable to the glink entry. This is to avoid
+ text relocations. We can't do this for ifunc in
+ allocate_dynrelocs, as we do for normal dynamic
+ function symbols with plt entries, because we need
+ to keep the original value around for the ifunc
+ relocation. */
+ sym->st_shndx = (_bfd_elf_section_from_bfd_section
+ (output_bfd, htab->glink->output_section));
+ sym->st_value = (ent->glink_offset +
+ htab->glink->output_offset
+ + htab->glink->output_section->vma);
+ }
doneone = TRUE;
}
|| !htab->elf.dynamic_sections_created
|| h->dynindx == -1)
{
+ unsigned char *p;
asection *splt = htab->plt;
if (!htab->elf.dynamic_sections_created
|| h->dynindx == -1)
splt = htab->iplt;
- write_glink_stub (ent, splt, info);
+ p = (unsigned char *) htab->glink->contents + ent->glink_offset;
+
+ if (h == htab->tls_get_addr && !htab->no_tls_get_addr_opt)
+ {
+ bfd_put_32 (output_bfd, LWZ_11_3, p);
+ p += 4;
+ bfd_put_32 (output_bfd, LWZ_12_3 + 4, p);
+ p += 4;
+ bfd_put_32 (output_bfd, MR_0_3, p);
+ p += 4;
+ bfd_put_32 (output_bfd, CMPWI_11_0, p);
+ p += 4;
+ bfd_put_32 (output_bfd, ADD_3_12_2, p);
+ p += 4;
+ bfd_put_32 (output_bfd, BEQLR, p);
+ p += 4;
+ bfd_put_32 (output_bfd, MR_3_0, p);
+ p += 4;
+ bfd_put_32 (output_bfd, NOP, p);
+ p += 4;
+ }
+
+ write_glink_stub (ent, splt, p, info);
- if (!info->shared && !info->pie)
+ if (!info->shared)
/* We only need one non-PIC glink stub. */
break;
}
+ htab->glink->output_offset);
/* Last comes the PLTresolve stub. */
- if (info->shared || info->pie)
+ if (info->shared)
{
bfd_vma bcl;
projects / deliverable / binutils-gdb.git / blobdiff