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authorRichard Henderson <rth@redhat.com>1998-08-08 22:17:16 +0000
committerRichard Henderson <rth@redhat.com>1998-08-08 22:17:16 +0000
commit382fab1a7ac6cd5900baa5c6e04e7f2f2432f3d7 (patch)
tree4438977853b5dfb7e741f9abc613771085bd4f76 /bfd
parent157a2e242f959b6e8a29675b40bfbd726e9e3f89 (diff)
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* elf64-alpha.c (alpha_elf_dynamic_symbol_p): Undef weak symbols
are always dynamic. (elf64_alpha_calc_dynrel_sizes): Allow enough room for RELATIVE .got relocs in -Bsymbolic shared objects.
Diffstat (limited to 'bfd')
-rw-r--r--bfd/ChangeLog7
-rw-r--r--bfd/elf64-alpha.c410
2 files changed, 229 insertions, 188 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 9701b93..30f5694 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,3 +1,10 @@
+Sat Aug 8 15:15:30 1998 Richard Henderson <rth@cygnus.com>
+
+ * elf64-alpha.c (alpha_elf_dynamic_symbol_p): Undef weak symbols
+ are always dynamic.
+ (elf64_alpha_calc_dynrel_sizes): Allow enough room for RELATIVE
+ .got relocs in -Bsymbolic shared objects.
+
start-sanitize-armelf
Wed Aug 5 15:48:08 1998 Nick Clifton <nickc@cygnus.com>
diff --git a/bfd/elf64-alpha.c b/bfd/elf64-alpha.c
index a4aa3aa..dc9c6cc 100644
--- a/bfd/elf64-alpha.c
+++ b/bfd/elf64-alpha.c
@@ -229,7 +229,8 @@ struct alpha_elf_link_hash_table
(((info)->shared && !(info)->symbolic && (h)->dynindx != -1) \
|| (((h)->elf_link_hash_flags \
& (ELF_LINK_HASH_DEF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR)) \
- == (ELF_LINK_HASH_DEF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR)))
+ == (ELF_LINK_HASH_DEF_DYNAMIC | ELF_LINK_HASH_REF_REGULAR)) \
+ || (h)->root.type == bfd_link_hash_undefweak)
/* Create an entry in a Alpha ELF linker hash table. */
@@ -1043,9 +1044,9 @@ struct alpha_relax_info
bfd_vma gp;
bfd *gotobj;
asection *tsec;
- Elf_Internal_Sym *elfsym;
struct alpha_elf_link_hash_entry *h;
struct alpha_elf_got_entry *gotent;
+ unsigned char other;
};
static Elf_Internal_Rela * elf64_alpha_relax_with_lituse
@@ -1282,12 +1283,12 @@ elf64_alpha_relax_opt_call (info, symval)
/* If the symbol is marked NOPV, we are being told the function never
needs its procedure value. */
- if (info->elfsym->st_other == STO_ALPHA_NOPV)
+ if (info->other == STO_ALPHA_NOPV)
return symval;
/* If the symbol is marked STD_GP, we are being told the function does
a normal ldgp in the first two words. */
- else if (info->elfsym->st_other == STO_ALPHA_STD_GPLOAD)
+ else if (info->other == STO_ALPHA_STD_GPLOAD)
;
/* Otherwise, we may be able to identify a GP load in the first two
@@ -1298,14 +1299,23 @@ elf64_alpha_relax_opt_call (info, symval)
bfd_vma ofs;
/* Load the relocations from the section that the target symbol is in. */
- tsec_relocs = (_bfd_elf64_link_read_relocs
- (info->abfd, info->tsec, (PTR) NULL,
- (Elf_Internal_Rela *) NULL,
- info->link_info->keep_memory));
- if (tsec_relocs == NULL)
- return 0;
- tsec_free = (info->link_info->keep_memory ? NULL : tsec_relocs);
- tsec_relend = tsec_relocs + info->tsec->reloc_count;
+ if (info->sec == info->tsec)
+ {
+ tsec_relocs = info->relocs;
+ tsec_relend = info->relend;
+ tsec_free = NULL;
+ }
+ else
+ {
+ tsec_relocs = (_bfd_elf64_link_read_relocs
+ (info->abfd, info->tsec, (PTR) NULL,
+ (Elf_Internal_Rela *) NULL,
+ info->link_info->keep_memory));
+ if (tsec_relocs == NULL)
+ return 0;
+ tsec_relend = tsec_relocs + info->tsec->reloc_count;
+ tsec_free = (info->link_info->keep_memory ? NULL : tsec_relocs);
+ }
/* Recover the symbol's offset within the section. */
ofs = (symval - info->tsec->output_section->vma
@@ -1527,7 +1537,7 @@ elf64_alpha_relax_section (abfd, sec, link_info, again)
info.h = NULL;
info.gotent = local_got_entries[ELF64_R_SYM(irel->r_info)];
- info.elfsym = &isym;
+ info.other = isym.st_other;
symval = isym.st_value;
}
else
@@ -1555,7 +1565,7 @@ elf64_alpha_relax_section (abfd, sec, link_info, again)
info.h = h;
info.gotent = gotent;
info.tsec = h->root.root.u.def.section;
- info.elfsym = &((elf_symbol_type *) h)->internal_elf_sym;
+ info.other = h->root.other;
symval = h->root.root.u.def.value;
}
symval += info.tsec->output_section->vma + info.tsec->output_offset;
@@ -1618,6 +1628,8 @@ elf64_alpha_relax_section (abfd, sec, link_info, again)
}
}
+ *again = info.changed_contents || info.changed_relocs;
+
return true;
error_return:
@@ -2279,7 +2291,7 @@ elf64_alpha_output_extsym (h, data)
{
output_section = sec->output_section;
if (output_section != NULL)
- h->esym.asym.value = (h->root.plt_offset
+ h->esym.asym.value = (h->root.plt.offset
+ sec->output_offset
+ output_section->vma);
else
@@ -2636,7 +2648,7 @@ elf64_alpha_adjust_dynamic_symbol (info, h)
if (s->_raw_size == 0)
s->_raw_size = PLT_HEADER_SIZE;
- h->plt_offset = s->_raw_size;
+ h->plt.offset = s->_raw_size;
s->_raw_size += PLT_ENTRY_SIZE;
/* If this symbol is not defined in a regular file, and we are not
@@ -2646,7 +2658,7 @@ elf64_alpha_adjust_dynamic_symbol (info, h)
if (!info->shared)
{
h->root.u.def.section = s;
- h->root.u.def.value = h->plt_offset;
+ h->root.u.def.value = h->plt.offset;
}
/* We also need a JMP_SLOT entry in the .rela.plt section. */
@@ -2759,6 +2771,7 @@ elf64_alpha_can_merge_gots (a, b)
bfd *a, *b;
{
int total = alpha_elf_tdata (a)->total_got_entries;
+ bfd *bsub;
/* Trivial quick fallout test. */
if (total + alpha_elf_tdata (b)->total_got_entries <= MAX_GOT_ENTRIES)
@@ -2771,39 +2784,40 @@ elf64_alpha_can_merge_gots (a, b)
/* Failing the common trivial comparison, we must effectively
perform the merge. Not actually performing the merge means that
we don't have to store undo information in case we fail. */
- {
- struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes(b);
- Elf_Internal_Shdr *symtab_hdr = &elf_tdata(b)->symtab_hdr;
- int i, n;
+ for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
+ {
+ struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes (bsub);
+ Elf_Internal_Shdr *symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
+ int i, n;
- n = symtab_hdr->sh_size / symtab_hdr->sh_entsize - symtab_hdr->sh_info;
- for (i = 0; i < n; ++i)
- {
- struct alpha_elf_got_entry *ae, *be;
- struct alpha_elf_link_hash_entry *h;
+ n = symtab_hdr->sh_size / symtab_hdr->sh_entsize - symtab_hdr->sh_info;
+ for (i = 0; i < n; ++i)
+ {
+ struct alpha_elf_got_entry *ae, *be;
+ struct alpha_elf_link_hash_entry *h;
- h = hashes[i];
- while (h->root.root.type == bfd_link_hash_indirect
- || h->root.root.type == bfd_link_hash_warning)
- h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
+ h = hashes[i];
+ while (h->root.root.type == bfd_link_hash_indirect
+ || h->root.root.type == bfd_link_hash_warning)
+ h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
- for (be = h->got_entries; be ; be = be->next)
- {
- if (be->use_count == 0)
- continue;
- if (be->gotobj != b)
- continue;
+ for (be = h->got_entries; be ; be = be->next)
+ {
+ if (be->use_count == 0)
+ continue;
+ if (be->gotobj != b)
+ continue;
- for (ae = h->got_entries; ae ; ae = ae->next)
- if (ae->gotobj == a && ae->addend == be->addend)
- goto global_found;
+ for (ae = h->got_entries; ae ; ae = ae->next)
+ if (ae->gotobj == a && ae->addend == be->addend)
+ goto global_found;
- if (++total > MAX_GOT_ENTRIES)
- return false;
- global_found:;
- }
- }
- }
+ if (++total > MAX_GOT_ENTRIES)
+ return false;
+ global_found:;
+ }
+ }
+ }
return true;
}
@@ -2814,79 +2828,91 @@ static void
elf64_alpha_merge_gots (a, b)
bfd *a, *b;
{
- int total = alpha_elf_tdata(a)->total_got_entries;
+ int total = alpha_elf_tdata (a)->total_got_entries;
+ bfd *bsub;
/* Remember local expansion. */
{
- int e = alpha_elf_tdata(b)->n_local_got_entries;
+ int e = alpha_elf_tdata (b)->n_local_got_entries;
total += e;
- alpha_elf_tdata(a)->n_local_got_entries += e;
+ alpha_elf_tdata (a)->n_local_got_entries += e;
}
- /* Let the local .got entries know they are part of a new subsegment. */
- {
- struct alpha_elf_got_entry **local_got_entries;
- local_got_entries = alpha_elf_tdata(b)->local_got_entries;
- if (local_got_entries)
- {
- int i, n;
+ for (bsub = b; bsub ; bsub = alpha_elf_tdata (bsub)->in_got_link_next)
+ {
+ struct alpha_elf_got_entry **local_got_entries;
+ struct alpha_elf_link_hash_entry **hashes;
+ Elf_Internal_Shdr *symtab_hdr;
+ int i, n;
+
+ /* Let the local .got entries know they are part of a new subsegment. */
+ local_got_entries = alpha_elf_tdata (bsub)->local_got_entries;
+ if (local_got_entries)
+ {
+ n = elf_tdata (bsub)->symtab_hdr.sh_info;
+ for (i = 0; i < n; ++i)
+ {
+ struct alpha_elf_got_entry *ent;
+ for (ent = local_got_entries[i]; ent; ent = ent->next)
+ ent->gotobj = a;
+ }
+ }
- n = elf_tdata(b)->symtab_hdr.sh_info;
- for (i = 0; i < n; ++i)
- {
- struct alpha_elf_got_entry *gotent;
- for (gotent = local_got_entries[i]; gotent; gotent = gotent->next)
- gotent->gotobj = a;
- }
- }
- }
+ /* Merge the global .got entries. */
+ hashes = alpha_elf_sym_hashes (bsub);
+ symtab_hdr = &elf_tdata (bsub)->symtab_hdr;
- /* Merge the global .got entries. */
- {
- struct alpha_elf_link_hash_entry **hashes = alpha_elf_sym_hashes(b);
- Elf_Internal_Shdr *symtab_hdr = &elf_tdata(b)->symtab_hdr;
- int i, n;
+ n = symtab_hdr->sh_size / symtab_hdr->sh_entsize - symtab_hdr->sh_info;
+ for (i = 0; i < n; ++i)
+ {
+ struct alpha_elf_got_entry *ae, *be, **pbe, **start;
+ struct alpha_elf_link_hash_entry *h;
- n = symtab_hdr->sh_size / symtab_hdr->sh_entsize - symtab_hdr->sh_info;
- for (i = 0; i < n; ++i)
- {
- struct alpha_elf_got_entry *ae, *be, **pbe, **start;
- struct alpha_elf_link_hash_entry *h;
+ h = hashes[i];
+ while (h->root.root.type == bfd_link_hash_indirect
+ || h->root.root.type == bfd_link_hash_warning)
+ h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
- h = hashes[i];
- while (h->root.root.type == bfd_link_hash_indirect
- || h->root.root.type == bfd_link_hash_warning)
- h = (struct alpha_elf_link_hash_entry *)h->root.root.u.i.link;
+ start = &h->got_entries;
+ for (pbe = start, be = *start; be ; pbe = &be->next, be = be->next)
+ {
+ if (be->use_count == 0)
+ {
+ *pbe = be->next;
+ continue;
+ }
+ if (be->gotobj != b)
+ continue;
- start = &h->got_entries;
- for (pbe = start, be = *start; be ; pbe = &be->next, be = be->next)
- {
- if (be->use_count == 0)
- {
- *pbe = be->next;
- continue;
- }
- if (be->gotobj != b)
- continue;
+ for (ae = *start; ae ; ae = ae->next)
+ if (ae->gotobj == a && ae->addend == be->addend)
+ {
+ ae->flags |= be->flags;
+ ae->use_count += be->use_count;
+ *pbe = be->next;
+ goto global_found;
+ }
+ be->gotobj = a;
+ total += 1;
- for (ae = *start; ae ; ae = ae->next)
- if (ae->gotobj == a && ae->addend == be->addend)
- {
- ae->flags |= be->flags;
- ae->use_count += be->use_count;
- *pbe = be->next;
- goto global_found;
- }
- be->gotobj = a;
- total += 1;
+ global_found:;
+ }
+ }
- global_found:;
- }
- }
- }
+ alpha_elf_tdata (bsub)->gotobj = a;
+ }
+ alpha_elf_tdata (a)->total_got_entries = total;
+
+ /* Merge the two in_got chains. */
+ {
+ bfd *next;
+
+ bsub = a;
+ while ((next = alpha_elf_tdata (bsub)->in_got_link_next) != NULL)
+ bsub = next;
- alpha_elf_tdata(a)->total_got_entries = total;
- alpha_elf_tdata(b)->gotobj = a;
+ alpha_elf_tdata (bsub)->in_got_link_next = b;
+ }
}
/* Calculate the offsets for the got entries. */
@@ -2979,69 +3005,73 @@ elf64_alpha_size_got_sections (output_bfd, info)
bfd *output_bfd;
struct bfd_link_info *info;
{
- bfd *i, *got_list, *cur_got_obj, **cur_got_tail;
- int ngots;
-
- ngots = 0;
- got_list = NULL;
- cur_got_obj = NULL;
- cur_got_tail = NULL;
- for (i = info->input_bfds; i ; i = i->link_next)
- {
- bfd *this_got = alpha_elf_tdata (i)->gotobj;
+ bfd *i, *got_list, *cur_got_obj;
+ int something_changed = 0;
- /* Don't play if there is no .got for this input file. */
- if (this_got == NULL)
- continue;
+ got_list = alpha_elf_hash_table (info)->got_list;
- if (alpha_elf_tdata (this_got)->total_got_entries > MAX_GOT_ENTRIES)
+ /* On the first time through, pretend we have an existing got list
+ consisting of all of the input files. */
+ if (got_list == NULL)
+ {
+ for (i = info->input_bfds; i ; i = i->link_next)
{
- /* Yikes! A single object file has too many entries. */
- (*_bfd_error_handler)
- (_("%s: .got subsegment exceeds 64K (size %d)"),
- bfd_get_filename(i),
- alpha_elf_tdata(this_got)->total_got_entries * 8);
- return false;
- }
+ bfd *this_got = alpha_elf_tdata (i)->gotobj;
+ if (this_got == NULL)
+ continue;
- if (cur_got_obj)
- {
- if (this_got == cur_got_obj)
- ; /* Some previous pass merged us already. */
- else if (elf64_alpha_can_merge_gots (cur_got_obj, i))
+ /* We are assuming no merging has yet ocurred. */
+ BFD_ASSERT (this_got == i);
+
+ if (alpha_elf_tdata (this_got)->total_got_entries > MAX_GOT_ENTRIES)
{
- elf64_alpha_merge_gots (cur_got_obj, i);
- *cur_got_tail = i;
+ /* Yikes! A single object file has too many entries. */
+ (*_bfd_error_handler)
+ (_("%s: .got subsegment exceeds 64K (size %d)"),
+ bfd_get_filename (i),
+ alpha_elf_tdata (this_got)->total_got_entries * 8);
+ return false;
}
+
+ if (got_list == NULL)
+ got_list = this_got;
else
- {
- if (++ngots == 2)
- {
- (*info->callbacks->warning)
- (info, _("using multiple gp values"), (char *) NULL,
- output_bfd, (asection *) NULL, (bfd_vma) 0);
- }
- *cur_got_tail = NULL;
- alpha_elf_tdata(cur_got_obj)->got_link_next = got_list;
- got_list = cur_got_obj;
- cur_got_obj = i;
- }
+ alpha_elf_tdata(cur_got_obj)->got_link_next = this_got;
+ cur_got_obj = this_got;
+ }
+
+ /* Strange degenerate case of no got references. */
+ if (got_list == NULL)
+ return true;
+
+ alpha_elf_hash_table (info)->got_list = got_list;
+
+ /* Force got offsets to be recalculated. */
+ something_changed = 1;
+ }
+
+ cur_got_obj = got_list;
+ i = alpha_elf_tdata(cur_got_obj)->got_link_next;
+ while (i != NULL)
+ {
+ if (elf64_alpha_can_merge_gots (cur_got_obj, i))
+ {
+ elf64_alpha_merge_gots (cur_got_obj, i);
+ i = alpha_elf_tdata(i)->got_link_next;
+ alpha_elf_tdata(cur_got_obj)->got_link_next = i;
+ something_changed = 1;
}
else
{
- ++ngots;
cur_got_obj = i;
+ i = alpha_elf_tdata(i)->got_link_next;
}
- cur_got_tail = &alpha_elf_tdata(i)->in_got_link_next;
}
- if (cur_got_obj)
- alpha_elf_tdata (cur_got_obj)->got_link_next = got_list;
- alpha_elf_hash_table (info)->got_list = cur_got_obj;
-
- /* Once the gots have been merged, fill in the got offsets for everything
- therein. */
- elf64_alpha_calc_got_offsets (info);
+ /* Once the gots have been merged, fill in the got offsets for
+ everything therein. */
+ if (1 || something_changed)
+ elf64_alpha_calc_got_offsets (info);
return true;
}
@@ -3108,39 +3138,31 @@ elf64_alpha_calc_dynrel_sizes (h, info)
/* If the symbol is dynamic, we'll need all the relocations in their
natural form. If it has been forced local, we'll need the same
- number of RELATIVE relocations. */
- if (alpha_elf_dynamic_symbol_p (&h->root, info)
- || (info->shared && h->root.dynindx == -1))
- {
- struct alpha_elf_reloc_entry *relent;
+ number of RELATIVE relocations.
+ Except, don't add a .got reloc if we're not using a .plt entry. */
- for (relent = h->reloc_entries; relent; relent = relent->next)
- {
- relent->srel->_raw_size +=
- sizeof (Elf64_External_Rela) * relent->count;
- }
+ if ((alpha_elf_dynamic_symbol_p (&h->root, info)
+ || info->shared)
+ && h->root.plt.offset == MINUS_ONE)
+ {
+ bfd *dynobj = elf_hash_table(info)->dynobj;
+ struct alpha_elf_got_entry *gotent;
+ bfd_size_type count = 0;
+ asection *srel;
- /* Only add a .rela.got entry if we're not using a .plt entry. */
- if (h->root.plt_offset == MINUS_ONE)
+ for (gotent = h->got_entries; gotent ; gotent = gotent->next)
+ count++;
+ if (count > 0)
{
- bfd *dynobj = elf_hash_table(info)->dynobj;
- struct alpha_elf_got_entry *gotent;
- bfd_size_type count = 0;
- asection *srel;
-
- for (gotent = h->got_entries; gotent ; gotent = gotent->next)
- count++;
- if (count > 0)
- {
- srel = bfd_get_section_by_name (dynobj, ".rela.got");
- BFD_ASSERT (srel != NULL);
- srel->_raw_size += sizeof (Elf64_External_Rela) * count;
- }
+ srel = bfd_get_section_by_name (dynobj, ".rela.got");
+ BFD_ASSERT (srel != NULL);
+ srel->_raw_size += sizeof (Elf64_External_Rela) * count;
}
}
- /* Otherwise, shared objects require RELATIVE relocs for all REFQUAD
+
+ /* Shared objects require at least RELATIVE relocs for all REFQUAD
and REFLONG relocations. */
- else if (info->shared)
+ if (info->shared)
{
struct alpha_elf_reloc_entry *relent;
@@ -3581,7 +3603,8 @@ elf64_alpha_relocate_section (output_bfd, info, input_bfd, input_section,
/* If the symbol has been forced local, output a
RELATIVE reloc, otherwise it will be handled in
finish_dynamic_symbol. */
- if (info->shared && h->root.dynindx == -1)
+ if (info->shared
+ && !alpha_elf_dynamic_symbol_p (&h->root, info))
{
Elf_Internal_Rela outrel;
@@ -3794,7 +3817,7 @@ elf64_alpha_finish_dynamic_symbol (output_bfd, info, h, sym)
{
bfd *dynobj = elf_hash_table(info)->dynobj;
- if (h->plt_offset != MINUS_ONE)
+ if (h->plt.offset != MINUS_ONE)
{
/* Fill in the .plt entry for this symbol. */
asection *splt, *sgot, *srel;
@@ -3822,21 +3845,21 @@ elf64_alpha_finish_dynamic_symbol (output_bfd, info, h, sym)
+ gotent->got_offset);
plt_addr = (splt->output_section->vma
+ splt->output_offset
- + h->plt_offset);
+ + h->plt.offset);
- plt_index = (h->plt_offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
+ plt_index = (h->plt.offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE;
/* Fill in the entry in the procedure linkage table. */
{
unsigned insn1, insn2, insn3;
- insn1 = PLT_ENTRY_WORD1 | ((-(h->plt_offset + 4) >> 2) & 0x1fffff);
+ insn1 = PLT_ENTRY_WORD1 | ((-(h->plt.offset + 4) >> 2) & 0x1fffff);
insn2 = PLT_ENTRY_WORD2;
insn3 = PLT_ENTRY_WORD3;
- bfd_put_32 (output_bfd, insn1, splt->contents + h->plt_offset);
- bfd_put_32 (output_bfd, insn2, splt->contents + h->plt_offset + 4);
- bfd_put_32 (output_bfd, insn3, splt->contents + h->plt_offset + 8);
+ bfd_put_32 (output_bfd, insn1, splt->contents + h->plt.offset);
+ bfd_put_32 (output_bfd, insn2, splt->contents + h->plt.offset + 4);
+ bfd_put_32 (output_bfd, insn3, splt->contents + h->plt.offset + 8);
}
/* Fill in the entry in the .rela.plt section. */
@@ -4053,6 +4076,15 @@ elf64_alpha_final_link (abfd, info)
HDRR *symhdr = &debug.symbolic_header;
PTR mdebug_handle = NULL;
+#if 0
+ if (++ngots == 2)
+ {
+ (*info->callbacks->warning)
+ (info, _("using multiple gp values"), (char *) NULL,
+ output_bfd, (asection *) NULL, (bfd_vma) 0);
+ }
+#endif
+
/* Go through the sections and collect the .reginfo and .mdebug
information. */
reginfo_sec = NULL;
@@ -4764,5 +4796,7 @@ elf64_alpha_ecoff_debug_swap =
#define elf_backend_want_got_plt 0
#define elf_backend_plt_readonly 0
#define elf_backend_want_plt_sym 1
+#define elf_backend_got_header_size 0
+#define elf_backend_plt_header_size PLT_HEADER_SIZE
#include "elf64-target.h"