/* PowerPC-specific support for 32-bit ELF
Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
- 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+ 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
Written by Ian Lance Taylor, Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
/* 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
0, /* rightshift */
1, /* size (0 = byte, 1 = short, 2 = long) */
16, /* bitsize */
- TRUE, /* pc_relative */
+ FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_signed, /* complain_on_overflow */
bfd_elf_generic_reloc, /* special_function */
#define is_ppc_elf(bfd) \
(bfd_get_flavour (bfd) == bfd_target_elf_flavour \
- && elf_object_id (bfd) == PPC32_ELF_TDATA)
+ && elf_object_id (bfd) == PPC32_ELF_DATA)
/* Override the generic function because we store some extras. */
ppc_elf_mkobject (bfd *abfd)
{
return bfd_elf_allocate_object (abfd, sizeof (struct ppc_elf_obj_tdata),
- PPC32_ELF_TDATA);
+ PPC32_ELF_DATA);
}
/* Fix bad default arch selected for a 32 bit input bfd when the
apuinfo_list;
static apuinfo_list *head;
-
+static bfd_boolean apuinfo_set;
static void
apuinfo_list_init (void)
{
head = NULL;
+ apuinfo_set = FALSE;
}
static void
{
bfd *ibfd;
asection *asec;
- char *buffer;
- unsigned num_input_sections;
- bfd_size_type output_section_size;
+ char *buffer = NULL;
+ bfd_size_type largest_input_size = 0;
unsigned i;
- unsigned num_entries;
- unsigned long offset;
unsigned long length;
const char *error_message = NULL;
if (link_info == NULL)
return;
- /* Scan the input bfds, looking for apuinfo sections. */
- num_input_sections = 0;
- output_section_size = 0;
-
- for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
- {
- asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
- if (asec)
- {
- ++ num_input_sections;
- output_section_size += asec->size;
- }
- }
-
- /* We need at least one input sections
- in order to make merging worthwhile. */
- if (num_input_sections < 1)
- return;
-
- /* Just make sure that the output section exists as well. */
- asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
- if (asec == NULL)
- return;
-
- /* Allocate a buffer for the contents of the input sections. */
- buffer = bfd_malloc (output_section_size);
- if (buffer == NULL)
- return;
-
- offset = 0;
apuinfo_list_init ();
/* Read in the input sections contents. */
for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
{
unsigned long datum;
- char *ptr;
asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
if (asec == NULL)
continue;
+ error_message = _("corrupt %s section in %B");
length = asec->size;
- if (length < 24)
+ if (length < 20)
+ goto fail;
+
+ apuinfo_set = TRUE;
+ if (largest_input_size < asec->size)
{
- error_message = _("corrupt or empty %s section in %B");
- goto fail;
+ if (buffer)
+ free (buffer);
+ largest_input_size = asec->size;
+ buffer = bfd_malloc (largest_input_size);
+ if (!buffer)
+ return;
}
-
+
if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
- || (bfd_bread (buffer + offset, length, ibfd) != length))
+ || (bfd_bread (buffer, length, ibfd) != length))
{
error_message = _("unable to read in %s section from %B");
goto fail;
}
- /* Process the contents of the section. */
- ptr = buffer + offset;
- error_message = _("corrupt %s section in %B");
-
/* Verify the contents of the header. Note - we have to
extract the values this way in order to allow for a
host whose endian-ness is different from the target. */
- datum = bfd_get_32 (ibfd, ptr);
+ datum = bfd_get_32 (ibfd, buffer);
if (datum != sizeof APUINFO_LABEL)
goto fail;
- datum = bfd_get_32 (ibfd, ptr + 8);
+ datum = bfd_get_32 (ibfd, buffer + 8);
if (datum != 0x2)
goto fail;
- if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
+ if (strcmp (buffer + 12, APUINFO_LABEL) != 0)
goto fail;
/* Get the number of bytes used for apuinfo entries. */
- datum = bfd_get_32 (ibfd, ptr + 4);
+ datum = bfd_get_32 (ibfd, buffer + 4);
if (datum + 20 != length)
goto fail;
- /* Make sure that we do not run off the end of the section. */
- if (offset + length > output_section_size)
- goto fail;
-
/* Scan the apuinfo section, building a list of apuinfo numbers. */
for (i = 0; i < datum; i += 4)
- apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
-
- /* Update the offset. */
- offset += length;
+ apuinfo_list_add (bfd_get_32 (ibfd, buffer + 20 + i));
}
error_message = NULL;
- /* Compute the size of the output section. */
- num_entries = apuinfo_list_length ();
- output_section_size = 20 + num_entries * 4;
-
- asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
+ if (apuinfo_set)
+ {
+ /* Compute the size of the output section. */
+ unsigned num_entries = apuinfo_list_length ();
+
+ /* Set the output section size, if it exists. */
+ asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
- if (! bfd_set_section_size (abfd, asec, output_section_size))
- ibfd = abfd,
- error_message = _("warning: unable to set size of %s section in %B");
+ if (asec && ! bfd_set_section_size (abfd, asec, 20 + num_entries * 4))
+ {
+ ibfd = abfd;
+ error_message = _("warning: unable to set size of %s section in %B");
+ }
+ }
fail:
- free (buffer);
+ if (buffer)
+ free (buffer);
if (error_message)
(*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
asection *asec,
bfd_byte *contents ATTRIBUTE_UNUSED)
{
- return (apuinfo_list_length ()
- && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
+ return apuinfo_set && strcmp (asec->name, APUINFO_SECTION_NAME) == 0;
}
/* Finally we can generate the output section. */
if (asec == NULL)
return;
- if (apuinfo_list_length () == 0)
+ if (!apuinfo_set)
return;
length = asec->size;
/* 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;
struct sym_cache sym_cache;
};
+/* Rename some of the generic section flags to better document how they
+ are used here. */
+
+/* Nonzero if this section has TLS related relocations. */
+#define has_tls_reloc sec_flg0
+
+/* Nonzero if this section has a call to __tls_get_addr. */
+#define has_tls_get_addr_call sec_flg1
+
/* Get the PPC ELF linker hash table from a link_info structure. */
#define ppc_elf_hash_table(p) \
- ((struct ppc_elf_link_hash_table *) (p)->hash)
+ (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
+ == PPC32_ELF_DATA ? ((struct ppc_elf_link_hash_table *) ((p)->hash)) : NULL)
/* Create an entry in a PPC ELF linker hash table. */
if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd,
ppc_elf_link_hash_newfunc,
- sizeof (struct ppc_elf_link_hash_entry)))
+ sizeof (struct ppc_elf_link_hash_entry),
+ PPC32_ELF_DATA))
{
free (ret);
return NULL;
*valp = sym->st_size;
}
- if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
+ if ((abfd->flags & DYNAMIC) == 0
+ && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE;
return TRUE;
{
struct plt_entry *ent;
+ if (addend < 32768)
+ sec = NULL;
for (ent = *plist; ent != NULL; ent = ent->next)
if (ent->sec == sec && ent->addend == addend)
break;
enum elf_ppc_reloc_type r_type;
struct elf_link_hash_entry *h;
int tls_type;
- struct plt_entry **ifunc;
r_symndx = ELF32_R_SYM (rel->r_info);
if (r_symndx < symtab_hdr->sh_info)
}
tls_type = 0;
- ifunc = NULL;
r_type = ELF32_R_TYPE (rel->r_info);
- if (!htab->is_vxworks)
+ if (h == NULL && !htab->is_vxworks)
{
- if (h != NULL)
- {
- if (h->type == STT_GNU_IFUNC)
- ifunc = &h->plt.plist;
- }
- else
+ Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
+ abfd, r_symndx);
+ if (isym == NULL)
+ return FALSE;
+
+ if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
+ && (!info->shared
+ || is_branch_reloc (r_type)))
{
- Elf_Internal_Sym *isym = bfd_sym_from_r_symndx (&htab->sym_cache,
- abfd, r_symndx);
- if (isym == NULL)
+ struct plt_entry **ifunc;
+ bfd_vma addend;
+
+ ifunc = update_local_sym_info (abfd, symtab_hdr, r_symndx,
+ PLT_IFUNC);
+ if (ifunc == NULL)
return FALSE;
- if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC
- && (!info->shared
- || is_branch_reloc (r_type)))
+ /* 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)
{
- 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;
+ ppc_elf_tdata (abfd)->makes_plt_call = 1;
+ if (info->shared)
+ addend = rel->r_addend;
}
+ if (!update_plt_info (abfd, ifunc, got2, addend))
+ return FALSE;
}
}
addend = rel->r_addend;
}
h->needs_plt = 1;
- if (!update_plt_info (abfd, &h->plt.plist,
- addend < 32768 ? NULL : got2, addend))
+ if (!update_plt_info (abfd, &h->plt.plist, got2, addend))
return FALSE;
}
break;
case R_PPC_EMB_MRKREF:
case R_PPC_NONE:
case R_PPC_max:
- case R_PPC_RELAX32:
- case R_PPC_RELAX32PC:
- case R_PPC_RELAX32_PLT:
- case R_PPC_RELAX32PC_PLT:
+ case R_PPC_RELAX:
+ case R_PPC_RELAX_PLT:
+ case R_PPC_RELAX_PLTREL24:
break;
/* These should only appear in dynamic objects. */
|| !h->def_regular)))
{
struct ppc_elf_dyn_relocs *p;
- struct ppc_elf_dyn_relocs **head;
+ struct ppc_elf_dyn_relocs **rel_head;
#ifdef DEBUG
fprintf (stderr,
relocations we need for this symbol. */
if (h != NULL)
{
- head = &ppc_elf_hash_entry (h)->dyn_relocs;
+ rel_head = &ppc_elf_hash_entry (h)->dyn_relocs;
}
else
{
s = sec;
vpp = &elf_section_data (s)->local_dynrel;
- head = (struct ppc_elf_dyn_relocs **) vpp;
+ rel_head = (struct ppc_elf_dyn_relocs **) vpp;
}
- p = *head;
+ p = *rel_head;
if (p == NULL || p->sec != sec)
{
p = bfd_alloc (htab->elf.dynobj, sizeof *p);
if (p == NULL)
return FALSE;
- p->next = *head;
- *head = p;
+ p->next = *rel_head;
+ *rel_head = p;
p->sec = sec;
p->count = 0;
p->pc_count = 0;
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)
struct plt_entry *ent;
ent = find_plt_ent (&h->plt.plist, NULL, 0);
- if (ent->plt.refcount > 0)
+ if (ent != NULL && ent->plt.refcount > 0)
ent->plt.refcount -= 1;
}
}
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)
+ if (ent != NULL && ent->plt.refcount > 0)
ent->plt.refcount -= 1;
}
break;
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;
+ for (ent = tga->plt.plist; ent != NULL; ent = ent->next)
+ if (ent->plt.refcount > 0)
+ break;
+ if (ent != NULL)
+ {
+ 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);
}
{
Elf_Internal_Sym *locsyms = NULL;
Elf_Internal_Shdr *symtab_hdr = &elf_symtab_hdr (ibfd);
+ asection *got2 = bfd_get_section_by_name (ibfd, ".got2");
for (sec = ibfd->sections; sec != NULL; sec = sec->next)
if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
else
continue;
+ case R_PPC_TLSGD:
+ case R_PPC_TLSLD:
+ expecting_tls_get_addr = 2;
+ tls_set = 0;
+ tls_clear = 0;
+ break;
+
default:
continue;
}
if (pass == 0)
{
if (!expecting_tls_get_addr
- || !sec->has_tls_get_addr_call)
+ || (expecting_tls_get_addr == 1
+ && !sec->has_tls_get_addr_call))
continue;
if (rel + 1 < relend
break;
}
+ if (expecting_tls_get_addr)
+ {
+ struct plt_entry *ent;
+ bfd_vma addend = 0;
+
+ if (info->shared
+ && ELF32_R_TYPE (rel[1].r_info) == R_PPC_PLTREL24)
+ addend = rel[1].r_addend;
+ ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
+ got2, addend);
+ if (ent != NULL && ent->plt.refcount > 0)
+ ent->plt.refcount -= 1;
+
+ if (expecting_tls_get_addr == 2)
+ continue;
+ }
+
if (h != NULL)
{
tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
*got_count -= 1;
}
- if (expecting_tls_get_addr)
- {
- struct plt_entry *ent;
-
- ent = find_plt_ent (&htab->tls_get_addr->plt.plist,
- NULL, 0);
- if (ent != NULL && ent->plt.refcount > 0)
- ent->plt.refcount -= 1;
- }
-
*tls_mask |= tls_set;
*tls_mask &= ~tls_clear;
}
{
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
local_plt = (struct plt_entry **) end_local_got;
end_local_plt = local_plt + locsymcount;
lgot_masks = (char *) end_local_plt;
+
for (; local_got < end_local_got; ++local_got, ++lgot_masks)
if (*local_got > 0)
{
for (ent = *local_plt; ent != NULL; ent = ent->next)
if (ent->plt.refcount > 0)
{
- asection *s = htab->iplt;
+ s = htab->iplt;
if (!doneone)
{
{
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)
for (irel = internal_relocs; irel < irelend; irel++)
{
unsigned long r_type = ELF32_R_TYPE (irel->r_info);
- bfd_vma reladdr, toff, roff;
+ bfd_vma toff, roff;
asection *tsec;
struct one_fixup *f;
size_t insn_offset = 0;
continue;
roff = irel->r_offset;
- reladdr = isec->output_section->vma + isec->output_offset + roff;
/* If the branch is in range, no need to do anything. */
if (tsec != bfd_und_section_ptr
{
size = 4 * ARRAY_SIZE (shared_stub_entry);
insn_offset = 12;
- stub_rtype = R_PPC_RELAX32PC;
}
else
{
size = 4 * ARRAY_SIZE (stub_entry);
insn_offset = 0;
- stub_rtype = R_PPC_RELAX32;
}
-
- if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
- != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
- abort ();
+ stub_rtype = R_PPC_RELAX;
if (tsec == htab->plt
|| tsec == htab->glink)
- stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
+ {
+ stub_rtype = R_PPC_RELAX_PLT;
+ if (r_type == R_PPC_PLTREL24)
+ stub_rtype = R_PPC_RELAX_PLTREL24;
+ }
/* Hijack the old relocation. Since we need two
relocations for this use a "composite" reloc. */
irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
stub_rtype);
irel->r_offset = trampoff + insn_offset;
- if (r_type == R_PPC_PLTREL24)
+ if (r_type == R_PPC_PLTREL24
+ && stub_rtype != R_PPC_RELAX_PLTREL24)
irel->r_addend = 0;
/* Record the fixup so we don't do it again this section. */
{
/* Convert the internal relax relocs to external form. */
for (irel = internal_relocs; irel < irelend; irel++)
- if (ELF32_R_TYPE (irel->r_info) == R_PPC_RELAX32)
+ if (ELF32_R_TYPE (irel->r_info) == R_PPC_RELAX)
{
unsigned long r_symndx = ELF32_R_SYM (irel->r_info);
#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)
{
&& h->root.u.def.section->output_section != NULL);
}
+/* If INSN is an opcode that may be used with an @tls operand, return
+ the transformed insn for TLS optimisation, otherwise return 0. If
+ REG is non-zero only match an insn with RB or RA equal to REG. */
+
+unsigned int
+_bfd_elf_ppc_at_tls_transform (unsigned int insn, unsigned int reg)
+{
+ unsigned int rtra;
+
+ if ((insn & (0x3f << 26)) != 31 << 26)
+ return 0;
+
+ if (reg == 0 || ((insn >> 11) & 0x1f) == reg)
+ rtra = insn & ((1 << 26) - (1 << 16));
+ else if (((insn >> 16) & 0x1f) == reg)
+ rtra = (insn & (0x1f << 21)) | ((insn & (0x1f << 11)) << 5);
+ else
+ return 0;
+
+ if ((insn & (0x3ff << 1)) == 266 << 1)
+ /* add -> addi. */
+ insn = 14 << 26;
+ else if ((insn & (0x1f << 1)) == 23 << 1
+ && ((insn & (0x1f << 6)) < 14 << 6
+ || ((insn & (0x1f << 6)) >= 16 << 6
+ && (insn & (0x1f << 6)) < 24 << 6)))
+ /* load and store indexed -> dform. */
+ insn = (32 | ((insn >> 6) & 0x1f)) << 26;
+ else if ((insn & (((0x1a << 5) | 0x1f) << 1)) == 21 << 1)
+ /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
+ insn = ((58 | ((insn >> 6) & 4)) << 26) | ((insn >> 6) & 1);
+ else if ((insn & (((0x1f << 5) | 0x1f) << 1)) == 341 << 1)
+ /* lwax -> lwa. */
+ insn = (58 << 26) | 2;
+ else
+ return 0;
+ insn |= rtra;
+ return insn;
+}
+
+/* If INSN is an opcode that may be used with an @tprel operand, return
+ the transformed insn for an undefined weak symbol, ie. with the
+ thread pointer REG operand removed. Otherwise return 0. */
+
+unsigned int
+_bfd_elf_ppc_at_tprel_transform (unsigned int insn, unsigned int reg)
+{
+ if ((insn & (0x1f << 16)) == reg << 16
+ && ((insn & (0x3f << 26)) == 14u << 26 /* addi */
+ || (insn & (0x3f << 26)) == 15u << 26 /* addis */
+ || (insn & (0x3f << 26)) == 32u << 26 /* lwz */
+ || (insn & (0x3f << 26)) == 34u << 26 /* lbz */
+ || (insn & (0x3f << 26)) == 36u << 26 /* stw */
+ || (insn & (0x3f << 26)) == 38u << 26 /* stb */
+ || (insn & (0x3f << 26)) == 40u << 26 /* lhz */
+ || (insn & (0x3f << 26)) == 42u << 26 /* lha */
+ || (insn & (0x3f << 26)) == 44u << 26 /* sth */
+ || (insn & (0x3f << 26)) == 46u << 26 /* lmw */
+ || (insn & (0x3f << 26)) == 47u << 26 /* stmw */
+ || (insn & (0x3f << 26)) == 48u << 26 /* lfs */
+ || (insn & (0x3f << 26)) == 50u << 26 /* lfd */
+ || (insn & (0x3f << 26)) == 52u << 26 /* stfs */
+ || (insn & (0x3f << 26)) == 54u << 26 /* stfd */
+ || ((insn & (0x3f << 26)) == 58u << 26 /* lwa,ld,lmd */
+ && (insn & 3) != 1)
+ || ((insn & (0x3f << 26)) == 62u << 26 /* std, stmd */
+ && ((insn & 3) == 0 || (insn & 3) == 3))))
+ {
+ insn &= ~(0x1f << 16);
+ }
+ else if ((insn & (0x1f << 21)) == reg << 21
+ && ((insn & (0x3e << 26)) == 24u << 26 /* ori, oris */
+ || (insn & (0x3e << 26)) == 26u << 26 /* xori,xoris */
+ || (insn & (0x3e << 26)) == 28u << 26 /* andi,andis */))
+ {
+ insn &= ~(0x1f << 21);
+ insn |= (insn & (0x1f << 16)) << 5;
+ if ((insn & (0x3e << 26)) == 26 << 26 /* xori,xoris */)
+ insn -= 2 >> 26; /* convert to ori,oris */
+ }
+ else
+ insn = 0;
+ return insn;
+}
+
/* The RELOCATE_SECTION function is called by the ELF backend linker
to handle the relocations for a section.
Elf_Internal_Rela *rel;
Elf_Internal_Rela *relend;
Elf_Internal_Rela outrel;
- bfd_byte *loc;
asection *got2, *sreloc = NULL;
bfd_vma *local_got_offsets;
bfd_boolean ret = TRUE;
reloc_howto_type *howto;
unsigned long r_symndx;
bfd_vma relocation;
- bfd_vma branch_bit, insn, from;
+ bfd_vma branch_bit, from;
bfd_boolean unresolved_reloc;
bfd_boolean warned;
unsigned int tls_type, tls_mask, tls_gd;
&& (tls_mask & TLS_TPREL) == 0)
{
bfd_vma insn;
+
insn = bfd_get_32 (output_bfd, contents + rel->r_offset - d_offset);
insn &= 31 << 21;
insn |= 0x3c020000; /* addis 0,2,0 */
if ((tls_mask & TLS_TLS) != 0
&& (tls_mask & TLS_TPREL) == 0)
{
- bfd_vma insn, rtra;
+ bfd_vma insn;
+
insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
- if ((insn & ((31 << 26) | (31 << 11)))
- == ((31 << 26) | (2 << 11)))
- rtra = insn & ((1 << 26) - (1 << 16));
- else if ((insn & ((31 << 26) | (31 << 16)))
- == ((31 << 26) | (2 << 16)))
- rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
- else
- abort ();
- if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
- /* add -> addi. */
- insn = 14 << 26;
- else if ((insn & (31 << 1)) == 23 << 1
- && ((insn & (31 << 6)) < 14 << 6
- || ((insn & (31 << 6)) >= 16 << 6
- && (insn & (31 << 6)) < 24 << 6)))
- /* load and store indexed -> dform. */
- insn = (32 | ((insn >> 6) & 31)) << 26;
- else if ((insn & (31 << 1)) == 21 << 1
- && (insn & (0x1a << 6)) == 0)
- /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
- insn = (((58 | ((insn >> 6) & 4)) << 26)
- | ((insn >> 6) & 1));
- else if ((insn & (31 << 1)) == 21 << 1
- && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
- /* lwax -> lwa. */
- insn = (58 << 26) | 2;
- else
+ insn = _bfd_elf_ppc_at_tls_transform (insn, 2);
+ if (insn == 0)
abort ();
- insn |= rtra;
bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
r_type = R_PPC_TPREL16_LO;
rel->r_info = ELF32_R_INFO (r_symndx, r_type);
insn1 |= 32 << 26; /* lwz */
if (offset != (bfd_vma) -1)
{
- rel[1].r_info
- = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info),
- R_PPC_NONE);
+ rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
insn2 = 0x7c631214; /* add 3,3,2 */
bfd_put_32 (output_bfd, insn2, contents + offset);
}
bfd_put_32 (output_bfd, insn2, contents + offset);
/* Zap the reloc on the _tls_get_addr call too. */
BFD_ASSERT (offset == rel[1].r_offset);
- rel[1].r_info = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info),
- R_PPC_NONE);
+ rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
}
break;
contents + rel->r_offset - d_offset);
/* Zap the reloc on the _tls_get_addr call too. */
BFD_ASSERT (rel->r_offset - d_offset == rel[1].r_offset);
- rel[1].r_info = ELF32_R_INFO (ELF32_R_SYM (rel[1].r_info),
- R_PPC_NONE);
+ rel[1].r_info = ELF32_R_INFO (STN_UNDEF, R_PPC_NONE);
rel--;
continue;
}
/* Branch not taken prediction relocations. */
case R_PPC_ADDR14_BRNTAKEN:
case R_PPC_REL14_BRNTAKEN:
- insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
- insn &= ~BRANCH_PREDICT_BIT;
- insn |= branch_bit;
+ {
+ bfd_vma insn;
- from = (rel->r_offset
- + input_section->output_offset
- + input_section->output_section->vma);
+ insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
+ insn &= ~BRANCH_PREDICT_BIT;
+ insn |= branch_bit;
- /* Invert 'y' bit if not the default. */
- if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
- insn ^= BRANCH_PREDICT_BIT;
+ from = (rel->r_offset
+ + input_section->output_offset
+ + input_section->output_section->vma);
- bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
- break;
+ /* Invert 'y' bit if not the default. */
+ if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
+ insn ^= BRANCH_PREDICT_BIT;
+
+ bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
+ break;
+ }
}
ifunc = NULL;
}
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;
}
|| h->root.type != bfd_link_hash_undefweak))
{
asection *rsec = htab->relgot;
+ bfd_byte * loc;
outrel.r_offset = (htab->got->output_section->vma
+ htab->got->output_offset
case R_PPC_TPREL16_LO:
case R_PPC_TPREL16_HI:
case R_PPC_TPREL16_HA:
+ if (h != NULL
+ && h->root.type == bfd_link_hash_undefweak
+ && h->dynindx == -1)
+ {
+ /* Make this relocation against an undefined weak symbol
+ resolve to zero. This is really just a tweak, since
+ code using weak externs ought to check that they are
+ defined before using them. */
+ bfd_byte *p = contents + rel->r_offset - d_offset;
+ unsigned int insn = bfd_get_32 (output_bfd, p);
+ insn = _bfd_elf_ppc_at_tprel_transform (insn, 2);
+ if (insn != 0)
+ bfd_put_32 (output_bfd, insn, p);
+ break;
+ }
addend -= htab->elf.tls_sec->vma + TP_OFFSET;
/* The TPREL16 relocs shouldn't really be used in shared
libs as they will result in DT_TEXTREL being set, but
&& !h->def_regular))
{
int skip;
-
+ bfd_byte * loc;
#ifdef DEBUG
fprintf (stderr, "ppc_elf_relocate_section needs to "
"create relocation for %s\n",
}
break;
- case R_PPC_RELAX32PC_PLT:
- case R_PPC_RELAX32_PLT:
+ case R_PPC_RELAX_PLT:
+ case R_PPC_RELAX_PLTREL24:
if (h != NULL)
{
- struct plt_entry *ent = find_plt_ent (&h->plt.plist, got2,
- info->shared ? addend : 0);
+ struct plt_entry *ent;
+ bfd_vma got2_addend = 0;
+
+ if (r_type == R_PPC_RELAX_PLTREL24)
+ {
+ if (info->shared)
+ got2_addend = addend;
+ addend = 0;
+ }
+ ent = find_plt_ent (&h->plt.plist, got2, got2_addend);
if (htab->plt_type == PLT_NEW)
relocation = (htab->glink->output_section->vma
+ htab->glink->output_offset
+ htab->plt->output_offset
+ ent->plt.offset);
}
- if (r_type == R_PPC_RELAX32_PLT)
- goto relax32;
/* Fall thru */
- case R_PPC_RELAX32PC:
- relocation -= (input_section->output_section->vma
- + input_section->output_offset
- + rel->r_offset - 4);
- /* Fall thru */
+ case R_PPC_RELAX:
+ if (info->shared)
+ relocation -= (input_section->output_section->vma
+ + input_section->output_offset
+ + rel->r_offset - 4);
- case R_PPC_RELAX32:
- relax32:
{
unsigned long t0;
unsigned long t1;
}
if (r_type == R_PPC_EMB_SDA21)
- { /* fill in register field */
+ {
+ bfd_vma insn; /* Fill in register field. */
+
insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
|| !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)
/* We only need one non-PIC glink stub. */
projects / deliverable / binutils-gdb.git / blobdiff