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authorJakub Jelinek <jakub@redhat.com>2002-09-27 19:29:18 +0000
committerJakub Jelinek <jakub@redhat.com>2002-09-27 19:29:18 +0000
commitbffbf9406ff7c4c8545d3f154e54926e5f37a9bb (patch)
treeb72fb7174541fc1ce2227be80bbc88bf22db2c9e /bfd/elf64-x86-64.c
parent43b2fdc74cb309f762060ac012d1a2319bc9a1cf (diff)
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bfd/
* reloc.c: Add x86-64 TLS relocs. * bfd-in2.h, libbfd.h: Rebuilt. * elf64-x86-64.c (x86_64_elf_howto): Fix size fields for 32-bit relocs. Add TLS relocs. (x86_64_reloc_map): Add TLS relocs. (elf64_x86_64_info_to_howto): Adjust for added TLS relocs. (struct elf64_x86_64_link_hash_entry): Add tls_type field. (GOT_UNKNOWN, GOT_NORMAL, GOT_TLS_GD, GOT_TLS_IE): Define. (elf64_x86_64_hash_entry): Define. (struct elf64_x86_64_obj_tdata): New. (elf64_x86_64_tdata, elf64_x86_64_local_got_tls_type): Define. (struct elf64_x86_64_link_hash_table): Add tls_ld_got. (link_hash_newfunc): Initialize tls_type. (elf64_x86_64_link_hash_table_create): Initialize tls_ld_got. (elf64_x86_64_copy_indirect_symbol): Swap tls_type if necessary. (elf64_x86_64_mkobject): New. (elf64_x86_64_elf_object_p): Allocate struct elf64_x86_64_obj_tdata. (elf64_x86_64_tls_transition): New. (elf64_x86_64_check_relocs): Add r_type variable and use it. Handle TLS relocs. (elf64_x86_64_gc_sweep_hook): Handle TLS relocs. (allocate_dynrelocs): Allocate GOT space for TLS relocs. (elf64_x86_64_size_dynamic_sections): Likewise. (dtpoff_base, tpoff): New. (elf64_x86_64_relocate_section): Handle TLS relocs. (elf64_x86_64_finish_dynamic_symbol): Only handle non-TLS GOT entries. (bfd_elf64_mkobject): Define. * elf32-i386.c (elf_i386_check_relocs) [R_386_TLS_LE]: Set DF_STATIC_TLS if shared. gas/ * config/tc-i386.c (tc_i386_fix_adjustable): Add x86-64 TLS relocs. Define them if not BFD_ASSEMBLER. (lex_got): Handle @tlsgd, @dtpoff and @tpoff in 64-bit mode, add @tlsld. (md_apply_fix3): No addend for BFD_RELOC_X86_64_TLSGD, BFD_RELOC_X86_64_TLSLD and BFD_RELOC_X86_64_GOTTPOFF. (tc_gen_reloc): Handle x86-64 TLS relocs. include/ * elf/x86-64.h: Add TLS relocs. ld/testsuite/ * lib/ld-lib.exp (run_ld_link_tests): Add. * ld-sh/sh64/sh64.exp (run_ld_link_tests, regexp_diff, file_contents): Remove. (sh64tests): Add 6th field to the tests array. * ld-i386/i386.exp (run_ld_link_tests): Remove. * ld-x86-64/x86-64.exp: New. * ld-x86-64/tlsbin.dd: New test. * ld-x86-64/tlsbinpic.s: New test. * ld-x86-64/tlsbin.rd: New test. * ld-x86-64/tlsbin.s: New test. * ld-x86-64/tlsbin.sd: New test. * ld-x86-64/tlsbin.td: New test. * ld-x86-64/tlslib.s: New test. * ld-x86-64/tlspic1.s: New test. * ld-x86-64/tlspic2.s: New test. * ld-x86-64/tlspic.dd: New test. * ld-x86-64/tlspic.rd: New test. * ld-x86-64/tlspic.sd: New test. * ld-x86-64/tlspic.td: New test.
Diffstat (limited to 'bfd/elf64-x86-64.c')
-rw-r--r--bfd/elf64-x86-64.c675
1 files changed, 626 insertions, 49 deletions
diff --git a/bfd/elf64-x86-64.c b/bfd/elf64-x86-64.c
index 9c4a9d4..fa2f2ee 100644
--- a/bfd/elf64-x86-64.c
+++ b/bfd/elf64-x86-64.c
@@ -40,16 +40,16 @@ static reloc_howto_type x86_64_elf_howto_table[] =
HOWTO(R_X86_64_64, 0, 4, 64, false, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_X86_64_64", false, MINUS_ONE, MINUS_ONE,
false),
- HOWTO(R_X86_64_PC32, 0, 4, 32, true, 0, complain_overflow_signed,
+ HOWTO(R_X86_64_PC32, 0, 2, 32, true, 0, complain_overflow_signed,
bfd_elf_generic_reloc, "R_X86_64_PC32", false, 0xffffffff, 0xffffffff,
true),
- HOWTO(R_X86_64_GOT32, 0, 4, 32, false, 0, complain_overflow_signed,
+ HOWTO(R_X86_64_GOT32, 0, 2, 32, false, 0, complain_overflow_signed,
bfd_elf_generic_reloc, "R_X86_64_GOT32", false, 0xffffffff, 0xffffffff,
false),
- HOWTO(R_X86_64_PLT32, 0, 4, 32, true, 0, complain_overflow_signed,
+ HOWTO(R_X86_64_PLT32, 0, 2, 32, true, 0, complain_overflow_signed,
bfd_elf_generic_reloc, "R_X86_64_PLT32", false, 0xffffffff, 0xffffffff,
true),
- HOWTO(R_X86_64_COPY, 0, 4, 32, false, 0, complain_overflow_bitfield,
+ HOWTO(R_X86_64_COPY, 0, 2, 32, false, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_X86_64_COPY", false, 0xffffffff, 0xffffffff,
false),
HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, false, 0, complain_overflow_bitfield,
@@ -61,13 +61,13 @@ static reloc_howto_type x86_64_elf_howto_table[] =
HOWTO(R_X86_64_RELATIVE, 0, 4, 64, false, 0, complain_overflow_bitfield,
bfd_elf_generic_reloc, "R_X86_64_RELATIVE", false, MINUS_ONE,
MINUS_ONE, false),
- HOWTO(R_X86_64_GOTPCREL, 0, 4, 32, true,0 , complain_overflow_signed,
+ HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, true, 0, complain_overflow_signed,
bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", false, 0xffffffff,
0xffffffff, true),
- HOWTO(R_X86_64_32, 0, 4, 32, false, 0, complain_overflow_unsigned,
+ HOWTO(R_X86_64_32, 0, 2, 32, false, 0, complain_overflow_unsigned,
bfd_elf_generic_reloc, "R_X86_64_32", false, 0xffffffff, 0xffffffff,
false),
- HOWTO(R_X86_64_32S, 0, 4, 32, false, 0, complain_overflow_signed,
+ HOWTO(R_X86_64_32S, 0, 2, 32, false, 0, complain_overflow_signed,
bfd_elf_generic_reloc, "R_X86_64_32S", false, 0xffffffff, 0xffffffff,
false),
HOWTO(R_X86_64_16, 0, 1, 16, false, 0, complain_overflow_bitfield,
@@ -78,6 +78,30 @@ static reloc_howto_type x86_64_elf_howto_table[] =
bfd_elf_generic_reloc, "R_X86_64_8", false, 0xff, 0xff, false),
HOWTO(R_X86_64_PC8, 0, 0, 8, true, 0, complain_overflow_signed,
bfd_elf_generic_reloc, "R_X86_64_PC8", false, 0xff, 0xff, true),
+ HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, false, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", false, MINUS_ONE,
+ MINUS_ONE, false),
+ HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, false, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", false, MINUS_ONE,
+ MINUS_ONE, false),
+ HOWTO(R_X86_64_TPOFF64, 0, 4, 64, false, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_X86_64_TPOFF64", false, MINUS_ONE,
+ MINUS_ONE, false),
+ HOWTO(R_X86_64_TLSGD, 0, 2, 32, true, 0, complain_overflow_signed,
+ bfd_elf_generic_reloc, "R_X86_64_TLSGD", false, 0xffffffff,
+ 0xffffffff, true),
+ HOWTO(R_X86_64_TLSLD, 0, 2, 32, true, 0, complain_overflow_signed,
+ bfd_elf_generic_reloc, "R_X86_64_TLSLD", false, 0xffffffff,
+ 0xffffffff, true),
+ HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, false, 0, complain_overflow_bitfield,
+ bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", false, 0xffffffff,
+ 0xffffffff, false),
+ HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, true, 0, complain_overflow_signed,
+ bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", false, 0xffffffff,
+ 0xffffffff, true),
+ HOWTO(R_X86_64_TPOFF32, 0, 2, 32, false, 0, complain_overflow_signed,
+ bfd_elf_generic_reloc, "R_X86_64_TPOFF32", false, 0xffffffff,
+ 0xffffffff, false),
/* GNU extension to record C++ vtable hierarchy. */
HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, false, 0, complain_overflow_dont,
@@ -114,6 +138,14 @@ static const struct elf_reloc_map x86_64_reloc_map[] =
{ BFD_RELOC_16_PCREL, R_X86_64_PC16, },
{ BFD_RELOC_8, R_X86_64_8, },
{ BFD_RELOC_8_PCREL, R_X86_64_PC8, },
+ { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, },
+ { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, },
+ { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, },
+ { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, },
+ { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, },
+ { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, },
+ { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, },
+ { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, },
{ BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, },
{ BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, },
};
@@ -128,6 +160,10 @@ static boolean elf64_x86_64_grok_psinfo
PARAMS ((bfd *, Elf_Internal_Note *));
static struct bfd_link_hash_table *elf64_x86_64_link_hash_table_create
PARAMS ((bfd *));
+static int elf64_x86_64_tls_transition
+ PARAMS ((struct bfd_link_info *, int, int));
+static boolean elf64_x86_64_mkobject
+ PARAMS((bfd *));
static boolean elf64_x86_64_elf_object_p PARAMS ((bfd *abfd));
static boolean create_got_section
PARAMS((bfd *, struct bfd_link_info *));
@@ -158,6 +194,10 @@ static boolean readonly_dynrelocs
PARAMS ((struct elf_link_hash_entry *, PTR));
static boolean elf64_x86_64_size_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
+static bfd_vma dtpoff_base
+ PARAMS ((struct bfd_link_info *));
+static bfd_vma tpoff
+ PARAMS ((struct bfd_link_info *, bfd_vma));
static boolean elf64_x86_64_relocate_section
PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
@@ -198,13 +238,13 @@ elf64_x86_64_info_to_howto (abfd, cache_ptr, dst)
r_type = ELF64_R_TYPE (dst->r_info);
if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT)
{
- BFD_ASSERT (r_type <= (unsigned int) R_X86_64_PC8);
+ BFD_ASSERT (r_type <= (unsigned int) R_X86_64_TPOFF32);
i = r_type;
}
else
{
BFD_ASSERT (r_type < (unsigned int) R_X86_64_max);
- i = r_type - ((unsigned int) R_X86_64_GNU_VTINHERIT - R_X86_64_PC8 - 1);
+ i = r_type - ((unsigned int) R_X86_64_GNU_VTINHERIT - R_X86_64_TPOFF32 - 1);
}
cache_ptr->howto = &x86_64_elf_howto_table[i];
BFD_ASSERT (r_type == cache_ptr->howto->type);
@@ -343,8 +383,32 @@ struct elf64_x86_64_link_hash_entry
/* Track dynamic relocs copied for this symbol. */
struct elf64_x86_64_dyn_relocs *dyn_relocs;
+
+#define GOT_UNKNOWN 0
+#define GOT_NORMAL 1
+#define GOT_TLS_GD 2
+#define GOT_TLS_IE 3
+ unsigned char tls_type;
+};
+
+#define elf64_x86_64_hash_entry(ent) \
+ ((struct elf64_x86_64_link_hash_entry *)(ent))
+
+struct elf64_x86_64_obj_tdata
+{
+ struct elf_obj_tdata root;
+
+ /* tls_type for each local got entry. */
+ char *local_got_tls_type;
};
+#define elf64_x86_64_tdata(abfd) \
+ ((struct elf64_x86_64_obj_tdata *) (abfd)->tdata.any)
+
+#define elf64_x86_64_local_got_tls_type(abfd) \
+ (elf64_x86_64_tdata (abfd)->local_got_tls_type)
+
+
/* x86-64 ELF linker hash table. */
struct elf64_x86_64_link_hash_table
@@ -360,6 +424,11 @@ struct elf64_x86_64_link_hash_table
asection *sdynbss;
asection *srelbss;
+ union {
+ bfd_signed_vma refcount;
+ bfd_vma offset;
+ } tls_ld_got;
+
/* Small local sym to section mapping cache. */
struct sym_sec_cache sym_sec;
};
@@ -395,6 +464,7 @@ link_hash_newfunc (entry, table, string)
eh = (struct elf64_x86_64_link_hash_entry *) entry;
eh->dyn_relocs = NULL;
+ eh->tls_type = GOT_UNKNOWN;
}
return entry;
@@ -427,6 +497,7 @@ elf64_x86_64_link_hash_table_create (abfd)
ret->sdynbss = NULL;
ret->srelbss = NULL;
ret->sym_sec.abfd = NULL;
+ ret->tls_ld_got.refcount = 0;
return &ret->elf.root;
}
@@ -538,18 +609,67 @@ elf64_x86_64_copy_indirect_symbol (bed, dir, ind)
eind->dyn_relocs = NULL;
}
+ if (ind->root.type == bfd_link_hash_indirect
+ && dir->got.refcount <= 0)
+ {
+ edir->tls_type = eind->tls_type;
+ eind->tls_type = GOT_UNKNOWN;
+ }
+
_bfd_elf_link_hash_copy_indirect (bed, dir, ind);
}
static boolean
-elf64_x86_64_elf_object_p (abfd)
+elf64_x86_64_mkobject (abfd)
bfd *abfd;
{
+ bfd_size_type amt = sizeof (struct elf64_x86_64_obj_tdata);
+ abfd->tdata.any = bfd_zalloc (abfd, amt);
+ if (abfd->tdata.any == NULL)
+ return false;
+ return true;
+}
+
+static boolean
+elf64_x86_64_elf_object_p (abfd)
+ bfd *abfd;
+{
+ /* Allocate our special target data. */
+ struct elf64_x86_64_obj_tdata *new_tdata;
+ bfd_size_type amt = sizeof (struct elf64_x86_64_obj_tdata);
+ new_tdata = bfd_zalloc (abfd, amt);
+ if (new_tdata == NULL)
+ return false;
+ new_tdata->root = *abfd->tdata.elf_obj_data;
+ abfd->tdata.any = new_tdata;
/* Set the right machine number for an x86-64 elf64 file. */
bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64);
return true;
}
+static int
+elf64_x86_64_tls_transition (info, r_type, is_local)
+ struct bfd_link_info *info;
+ int r_type;
+ int is_local;
+{
+ if (info->shared)
+ return r_type;
+
+ switch (r_type)
+ {
+ case R_X86_64_TLSGD:
+ case R_X86_64_GOTTPOFF:
+ if (is_local)
+ return R_X86_64_TPOFF32;
+ return R_X86_64_GOTTPOFF;
+ case R_X86_64_TLSLD:
+ return R_X86_64_TPOFF32;
+ }
+
+ return r_type;
+}
+
/* Look through the relocs for a section during the first phase, and
calculate needed space in the global offset table, procedure
linkage table, and dynamic reloc sections. */
@@ -580,10 +700,12 @@ elf64_x86_64_check_relocs (abfd, info, sec, relocs)
rel_end = relocs + sec->reloc_count;
for (rel = relocs; rel < rel_end; rel++)
{
+ unsigned int r_type;
unsigned long r_symndx;
struct elf_link_hash_entry *h;
r_symndx = ELF64_R_SYM (rel->r_info);
+ r_type = ELF64_R_TYPE (rel->r_info);
if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
{
@@ -598,38 +720,103 @@ elf64_x86_64_check_relocs (abfd, info, sec, relocs)
else
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
- switch (ELF64_R_TYPE (rel->r_info))
+ r_type = elf64_x86_64_tls_transition (info, r_type, h == NULL);
+ switch (r_type)
{
- case R_X86_64_GOT32:
- case R_X86_64_GOTPCREL:
- /* This symbol requires a global offset table entry. */
- if (h != NULL)
+ case R_X86_64_TLSLD:
+ htab->tls_ld_got.refcount += 1;
+ goto create_got;
+
+ case R_X86_64_TPOFF32:
+ if (info->shared)
{
- h->got.refcount += 1;
+ (*_bfd_error_handler)
+ (_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"),
+ bfd_archive_filename (abfd),
+ x86_64_elf_howto_table[r_type].name);
+ bfd_set_error (bfd_error_bad_value);
+ return false;
}
- else
- {
- bfd_signed_vma *local_got_refcounts;
+ break;
- /* This is a global offset table entry for a local symbol. */
- local_got_refcounts = elf_local_got_refcounts (abfd);
- if (local_got_refcounts == NULL)
- {
- bfd_size_type size;
+ case R_X86_64_GOTTPOFF:
+ if (info->shared)
+ info->flags |= DF_STATIC_TLS;
+ /* Fall through */
- size = symtab_hdr->sh_info;
- size *= sizeof (bfd_signed_vma);
- local_got_refcounts = ((bfd_signed_vma *)
- bfd_zalloc (abfd, size));
- if (local_got_refcounts == NULL)
+ case R_X86_64_GOT32:
+ case R_X86_64_GOTPCREL:
+ case R_X86_64_TLSGD:
+ /* This symbol requires a global offset table entry. */
+ {
+ int tls_type, old_tls_type;
+
+ switch (r_type)
+ {
+ default: tls_type = GOT_NORMAL; break;
+ case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break;
+ case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break;
+ }
+
+ if (h != NULL)
+ {
+ h->got.refcount += 1;
+ old_tls_type = elf64_x86_64_hash_entry (h)->tls_type;
+ }
+ else
+ {
+ bfd_signed_vma *local_got_refcounts;
+
+ /* This is a global offset table entry for a local symbol. */
+ local_got_refcounts = elf_local_got_refcounts (abfd);
+ if (local_got_refcounts == NULL)
+ {
+ bfd_size_type size;
+
+ size = symtab_hdr->sh_info;
+ size *= sizeof (bfd_signed_vma) + sizeof (char);
+ local_got_refcounts = ((bfd_signed_vma *)
+ bfd_zalloc (abfd, size));
+ if (local_got_refcounts == NULL)
+ return false;
+ elf_local_got_refcounts (abfd) = local_got_refcounts;
+ elf64_x86_64_local_got_tls_type (abfd)
+ = (char *) (local_got_refcounts + symtab_hdr->sh_info);
+ }
+ local_got_refcounts[r_symndx] += 1;
+ old_tls_type
+ = elf64_x86_64_local_got_tls_type (abfd) [r_symndx];
+ }
+
+ /* If a TLS symbol is accessed using IE at least once,
+ there is no point to use dynamic model for it. */
+ if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN
+ && (old_tls_type != GOT_TLS_GD || tls_type != GOT_TLS_IE))
+ {
+ if (old_tls_type == GOT_TLS_IE && tls_type == GOT_TLS_GD)
+ tls_type = old_tls_type;
+ else
+ {
+ (*_bfd_error_handler)
+ (_("%s: %s' accessed both as normal and thread local symbol"),
+ bfd_archive_filename (abfd),
+ h ? h->root.root.string : "<local>");
return false;
- elf_local_got_refcounts (abfd) = local_got_refcounts;
- }
- local_got_refcounts[r_symndx] += 1;
- }
+ }
+ }
+
+ if (old_tls_type != tls_type)
+ {
+ if (h != NULL)
+ elf64_x86_64_hash_entry (h)->tls_type = tls_type;
+ else
+ elf64_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type;
+ }
+ }
/* Fall through */
//case R_X86_64_GOTPCREL:
+ create_got:
if (htab->sgot == NULL)
{
if (htab->elf.dynobj == NULL)
@@ -671,7 +858,7 @@ elf64_x86_64_check_relocs (abfd, info, sec, relocs)
(*_bfd_error_handler)
(_("%s: relocation %s can not be used when making a shared object; recompile with -fPIC"),
bfd_archive_filename (abfd),
- x86_64_elf_howto_table[ELF64_R_TYPE (rel->r_info)].name);
+ x86_64_elf_howto_table[r_type].name);
bfd_set_error (bfd_error_bad_value);
return false;
}
@@ -719,9 +906,9 @@ elf64_x86_64_check_relocs (abfd, info, sec, relocs)
symbol. */
if ((info->shared
&& (sec->flags & SEC_ALLOC) != 0
- && (((ELF64_R_TYPE (rel->r_info) != R_X86_64_PC8)
- && (ELF64_R_TYPE (rel->r_info) != R_X86_64_PC16)
- && (ELF64_R_TYPE (rel->r_info) != R_X86_64_PC32))
+ && (((r_type != R_X86_64_PC8)
+ && (r_type != R_X86_64_PC16)
+ && (r_type != R_X86_64_PC32))
|| (h != NULL
&& (! info->symbolic
|| h->root.type == bfd_link_hash_defweak
@@ -822,9 +1009,9 @@ elf64_x86_64_check_relocs (abfd, info, sec, relocs)
}
p->count += 1;
- if (ELF64_R_TYPE (rel->r_info) == R_X86_64_PC8
- || ELF64_R_TYPE (rel->r_info) == R_X86_64_PC16
- || ELF64_R_TYPE (rel->r_info) == R_X86_64_PC32)
+ if (r_type == R_X86_64_PC8
+ || r_type == R_X86_64_PC16
+ || r_type == R_X86_64_PC32)
p->pc_count += 1;
}
break;
@@ -905,6 +1092,7 @@ elf64_x86_64_gc_sweep_hook (abfd, info, sec, relocs)
bfd_signed_vma *local_got_refcounts;
const Elf_Internal_Rela *rel, *relend;
unsigned long r_symndx;
+ int r_type;
struct elf_link_hash_entry *h;
elf_section_data (sec)->local_dynrel = NULL;
@@ -915,8 +1103,18 @@ elf64_x86_64_gc_sweep_hook (abfd, info, sec, relocs)
relend = relocs + sec->reloc_count;
for (rel = relocs; rel < relend; rel++)
- switch (ELF64_R_TYPE (rel->r_info))
+ switch ((r_type = elf64_x86_64_tls_transition (info,
+ ELF64_R_TYPE (rel->r_info),
+ ELF64_R_SYM (rel->r_info)
+ >= symtab_hdr->sh_info)))
{
+ case R_X86_64_TLSLD:
+ if (elf64_x86_64_hash_table (info)->tls_ld_got.refcount > 0)
+ elf64_x86_64_hash_table (info)->tls_ld_got.refcount -= 1;
+ break;
+
+ case R_X86_64_TLSGD:
+ case R_X86_64_GOTTPOFF:
case R_X86_64_GOT32:
case R_X86_64_GOTPCREL:
r_symndx = ELF64_R_SYM (rel->r_info);
@@ -1226,10 +1424,18 @@ allocate_dynrelocs (h, inf)
h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
}
- if (h->got.refcount > 0)
+ /* If R_X86_64_GOTTPOFF symbol is now local to the binary,
+ make it a R_X86_64_TPOFF32 requiring no GOT entry. */
+ if (h->got.refcount > 0
+ && !info->shared
+ && h->dynindx == -1
+ && elf64_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE)
+ h->got.offset = (bfd_vma) -1;
+ else if (h->got.refcount > 0)
{
asection *s;
boolean dyn;
+ int tls_type = elf64_x86_64_hash_entry (h)->tls_type;
/* Make sure this symbol is output as a dynamic symbol.
Undefined weak syms won't yet be marked as dynamic. */
@@ -1243,8 +1449,19 @@ allocate_dynrelocs (h, inf)
s = htab->sgot;
h->got.offset = s->_raw_size;
s->_raw_size += GOT_ENTRY_SIZE;
+ /* R_X86_64_TLSGD needs 2 consecutive GOT slots. */
+ if (tls_type == GOT_TLS_GD)
+ s->_raw_size += GOT_ENTRY_SIZE;
dyn = htab->elf.dynamic_sections_created;
- if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h))
+ /* R_X86_64_TLSGD needs one dynamic relocation if local symbol
+ and two if global.
+ R_X86_64_GOTTPOFF needs one dynamic relocation. */
+ if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
+ || tls_type == GOT_TLS_IE)
+ htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
+ else if (tls_type == GOT_TLS_GD)
+ htab->srelgot->_raw_size += 2 * sizeof (Elf64_External_Rela);
+ else if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h))
htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
}
else
@@ -1390,6 +1607,7 @@ elf64_x86_64_size_dynamic_sections (output_bfd, info)
{
bfd_signed_vma *local_got;
bfd_signed_vma *end_local_got;
+ char *local_tls_type;
bfd_size_type locsymcount;
Elf_Internal_Shdr *symtab_hdr;
asection *srel;
@@ -1432,15 +1650,20 @@ elf64_x86_64_size_dynamic_sections (output_bfd, info)
symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
locsymcount = symtab_hdr->sh_info;
end_local_got = local_got + locsymcount;
+ local_tls_type = elf64_x86_64_local_got_tls_type (ibfd);
s = htab->sgot;
srel = htab->srelgot;
- for (; local_got < end_local_got; ++local_got)
+ for (; local_got < end_local_got; ++local_got, ++local_tls_type)
{
if (*local_got > 0)
{
*local_got = s->_raw_size;
s->_raw_size += GOT_ENTRY_SIZE;
- if (info->shared)
+ if (*local_tls_type == GOT_TLS_GD)
+ s->_raw_size += GOT_ENTRY_SIZE;
+ if (info->shared
+ || *local_tls_type == GOT_TLS_GD
+ || *local_tls_type == GOT_TLS_IE)
srel->_raw_size += sizeof (Elf64_External_Rela);
}
else
@@ -1448,6 +1671,17 @@ elf64_x86_64_size_dynamic_sections (output_bfd, info)
}
}
+ if (htab->tls_ld_got.refcount > 0)
+ {
+ /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD
+ relocs. */
+ htab->tls_ld_got.offset = htab->sgot->_raw_size;
+ htab->sgot->_raw_size += 2 * GOT_ENTRY_SIZE;
+ htab->srelgot->_raw_size += sizeof (Elf64_External_Rela);
+ }
+ else
+ htab->tls_ld_got.offset = -1;
+
/* Allocate global sym .plt and .got entries, and space for global
sym dynamic relocs. */
elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
@@ -1558,6 +1792,38 @@ elf64_x86_64_size_dynamic_sections (output_bfd, info)
return true;
}
+/* Return the base VMA address which should be subtracted from real addresses
+ when resolving @dtpoff relocation.
+ This is PT_TLS segment p_vaddr. */
+
+static bfd_vma
+dtpoff_base (info)
+ struct bfd_link_info *info;
+{
+ /* If tls_segment is NULL, we should have signalled an error already. */
+ if (elf_hash_table (info)->tls_segment == NULL)
+ return 0;
+ return elf_hash_table (info)->tls_segment->start;
+}
+
+/* Return the relocation value for @tpoff relocation
+ if STT_TLS virtual address is ADDRESS. */
+
+static bfd_vma
+tpoff (info, address)
+ struct bfd_link_info *info;
+ bfd_vma address;
+{
+ struct elf_link_tls_segment *tls_segment
+ = elf_hash_table (info)->tls_segment;
+
+ /* If tls_segment is NULL, we should have signalled an error already. */
+ if (tls_segment == NULL)
+ return 0;
+ return address - align_power (tls_segment->size, tls_segment->align)
+ - tls_segment->start;
+}
+
/* Relocate an x86_64 ELF section. */
static boolean
@@ -1591,7 +1857,7 @@ elf64_x86_64_relocate_section (output_bfd, info, input_bfd, input_section,
relend = relocs + input_section->reloc_count;
for (; rel < relend; rel++)
{
- int r_type;
+ unsigned int r_type;
reloc_howto_type *howto;
unsigned long r_symndx;
struct elf_link_hash_entry *h;
@@ -1601,13 +1867,14 @@ elf64_x86_64_relocate_section (output_bfd, info, input_bfd, input_section,
bfd_vma relocation;
boolean unresolved_reloc;
bfd_reloc_status_type r;
+ int tls_type;
r_type = ELF64_R_TYPE (rel->r_info);
if (r_type == (int) R_X86_64_GNU_VTINHERIT
|| r_type == (int) R_X86_64_GNU_VTENTRY)
continue;
- if (r_type < 0 || r_type >= R_X86_64_max)
+ if (r_type >= R_X86_64_max)
{
bfd_set_error (bfd_error_bad_value);
return false;
@@ -1933,6 +2200,313 @@ elf64_x86_64_relocate_section (output_bfd, info, input_bfd, input_section,
break;
+ case R_X86_64_TLSGD:
+ case R_X86_64_GOTTPOFF:
+ r_type = elf64_x86_64_tls_transition (info, r_type, h == NULL);
+ tls_type = GOT_UNKNOWN;
+ if (h == NULL && local_got_offsets)
+ tls_type = elf64_x86_64_local_got_tls_type (input_bfd) [r_symndx];
+ else if (h != NULL)
+ {
+ tls_type = elf64_x86_64_hash_entry (h)->tls_type;
+ if (!info->shared && h->dynindx == -1 && tls_type == GOT_TLS_IE)
+ r_type = R_X86_64_TPOFF32;
+ }
+ if (r_type == R_X86_64_TLSGD)
+ {
+ if (tls_type == GOT_TLS_IE)
+ r_type = R_X86_64_GOTTPOFF;
+ }
+
+ if (r_type == R_X86_64_TPOFF32)
+ {
+ BFD_ASSERT (! unresolved_reloc);
+ if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSGD)
+ {
+ unsigned int i;
+ static unsigned char tlsgd[7]
+ = { 0x66, 0x66, 0x66, 0x66, 0x48, 0x8d, 0x3d };
+
+ /* GD->LE transition.
+ .long 0x66666666; leaq foo@tlsgd(%rip), %rdi
+ callq __tls_get_addr@plt
+ Change it into:
+ movq %fs:0, %rax
+ leaq foo@tpoff(%rax), %rax */
+ BFD_ASSERT (rel->r_offset >= 7);
+ for (i = 0; i < 7; i++)
+ BFD_ASSERT (bfd_get_8 (input_bfd,
+ contents + rel->r_offset - 7 + i)
+ == tlsgd[i]);
+ BFD_ASSERT (rel->r_offset + 9 <= input_section->_raw_size);
+ BFD_ASSERT (bfd_get_8 (input_bfd,
+ contents + rel->r_offset + 4)
+ == 0xe8);
+ BFD_ASSERT (rel + 1 < relend);
+ BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32);
+ memcpy (contents + rel->r_offset - 7,
+ "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0",
+ 16);
+ bfd_put_32 (output_bfd, tpoff (info, relocation),
+ contents + rel->r_offset + 5);
+ /* Skip R_X86_64_PLT32. */
+ rel++;
+ continue;
+ }
+ else
+ {
+ unsigned int val, type, reg;
+
+ /* IE->LE transition:
+ Originally it can be one of:
+ movq foo@gottpoff(%rip), %reg
+ addq foo@gottpoff(%rip), %reg
+ We change it into:
+ movq $foo, %reg
+ leaq foo(%reg), %reg
+ addq $foo, %reg. */
+ BFD_ASSERT (rel->r_offset >= 3);
+ val = bfd_get_8 (input_bfd, contents + rel->r_offset - 3);
+ BFD_ASSERT (val == 0x48 || val == 0x4c);
+ type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2);
+ BFD_ASSERT (type == 0x8b || type == 0x03);
+ reg = bfd_get_8 (input_bfd, contents + rel->r_offset - 1);
+ BFD_ASSERT ((reg & 0xc7) == 5);
+ reg >>= 3;
+ BFD_ASSERT (rel->r_offset + 4 <= input_section->_raw_size);
+ if (type == 0x8b)
+ {
+ /* movq */
+ if (val == 0x4c)
+ bfd_put_8 (output_bfd, 0x49,
+ contents + rel->r_offset - 3);
+ bfd_put_8 (output_bfd, 0xc7,
+ contents + rel->r_offset - 2);
+ bfd_put_8 (output_bfd, 0xc0 | reg,
+ contents + rel->r_offset - 1);
+ }
+ else if (reg == 4)
+ {
+ /* addq -> addq - addressing with %rsp/%r12 is
+ special */
+ if (val == 0x4c)
+ bfd_put_8 (output_bfd, 0x49,
+ contents + rel->r_offset - 3);
+ bfd_put_8 (output_bfd, 0x81,
+ contents + rel->r_offset - 2);
+ bfd_put_8 (output_bfd, 0xc0 | reg,
+ contents + rel->r_offset - 1);
+ }
+ else
+ {
+ /* addq -> leaq */
+ if (val == 0x4c)
+ bfd_put_8 (output_bfd, 0x4d,
+ contents + rel->r_offset - 3);
+ bfd_put_8 (output_bfd, 0x8d,
+ contents + rel->r_offset - 2);
+ bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3),
+ contents + rel->r_offset - 1);
+ }
+ bfd_put_32 (output_bfd, tpoff (info, relocation),
+ contents + rel->r_offset);
+ continue;
+ }
+ }
+
+ if (htab->sgot == NULL)
+ abort ();
+
+ if (h != NULL)
+ off = h->got.offset;
+ else
+ {
+ if (local_got_offsets == NULL)
+ abort ();
+
+ off = local_got_offsets[r_symndx];
+ }
+
+ if ((off & 1) != 0)
+ off &= ~1;
+ else
+ {
+ Elf_Internal_Rela outrel;
+ Elf64_External_Rela *loc;
+ int dr_type, indx;
+
+ if (htab->srelgot == NULL)
+ abort ();
+
+ outrel.r_offset = (htab->sgot->output_section->vma
+ + htab->sgot->output_offset + off);
+
+ indx = h && h->dynindx != -1 ? h->dynindx : 0;
+ if (r_type == R_X86_64_TLSGD)
+ dr_type = R_X86_64_DTPMOD64;
+ else
+ dr_type = R_X86_64_TPOFF64;
+
+ bfd_put_64 (output_bfd, 0, htab->sgot->contents + off);
+ outrel.r_addend = 0;
+ if (dr_type == R_X86_64_TPOFF64 && indx == 0)
+ outrel.r_addend = relocation - dtpoff_base (info);
+ outrel.r_info = ELF64_R_INFO (indx, dr_type);
+
+ loc = (Elf64_External_Rela *) htab->srelgot->contents;
+ loc += htab->srelgot->reloc_count++;
+ bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
+
+ if (r_type == R_X86_64_TLSGD)
+ {
+ if (indx == 0)
+ {
+ BFD_ASSERT (! unresolved_reloc);
+ bfd_put_64 (output_bfd,
+ relocation - dtpoff_base (info),
+ htab->sgot->contents + off + GOT_ENTRY_SIZE);
+ }
+ else
+ {
+ bfd_put_64 (output_bfd, 0,
+ htab->sgot->contents + off + GOT_ENTRY_SIZE);
+ outrel.r_info = ELF64_R_INFO (indx,
+ R_X86_64_DTPOFF64);
+ outrel.r_offset += GOT_ENTRY_SIZE;
+ htab->srelgot->reloc_count++;
+ loc++;
+ bfd_elf64_swap_reloca_out (output_bfd, &outrel,
+ loc);
+ }
+ }
+
+ if (h != NULL)
+ h->got.offset |= 1;
+ else
+ local_got_offsets[r_symndx] |= 1;
+ }
+
+ if (off >= (bfd_vma) -2)
+ abort ();
+ if (r_type == ELF64_R_TYPE (rel->r_info))
+ {
+ relocation = htab->sgot->output_section->vma
+ + htab->sgot->output_offset + off;
+ unresolved_reloc = false;
+ }
+ else
+ {
+ unsigned int i;
+ static unsigned char tlsgd[7]
+ = { 0x66, 0x66, 0x66, 0x66, 0x48, 0x8d, 0x3d };
+
+ /* GD->IE transition.
+ .long 0x66666666; leaq foo@tlsgd(%rip), %rdi
+ callq __tls_get_addr@plt
+ Change it into:
+ movq %fs:0, %rax
+ addq foo@gottpoff(%rip), %rax */
+ BFD_ASSERT (rel->r_offset >= 7);
+ for (i = 0; i < 7; i++)
+ BFD_ASSERT (bfd_get_8 (input_bfd,
+ contents + rel->r_offset - 7 + i)
+ == tlsgd[i]);
+ BFD_ASSERT (rel->r_offset + 9 <= input_section->_raw_size);
+ BFD_ASSERT (bfd_get_8 (input_bfd,
+ contents + rel->r_offset + 4)
+ == 0xe8);
+ BFD_ASSERT (rel + 1 < relend);
+ BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32);
+ memcpy (contents + rel->r_offset - 7,
+ "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0",
+ 16);
+
+ relocation = (htab->sgot->output_section->vma
+ + htab->sgot->output_offset + off
+ - rel->r_offset
+ - input_section->output_section->vma
+ - input_section->output_offset
+ - 9);
+ bfd_put_32 (output_bfd, relocation,
+ contents + rel->r_offset + 5);
+ /* Skip R_X86_64_PLT32. */
+ rel++;
+ continue;
+ }
+ break;
+
+ case R_X86_64_TLSLD:
+ if (! info->shared)
+ {
+ /* LD->LE transition:
+ Ensure it is:
+ leaq foo@tlsld(%rip), %rdi; call __tls_get_addr@plt.
+ We change it into:
+ .word 0x6666; .byte 0x66; movl %fs:0, %rax. */
+ BFD_ASSERT (rel->r_offset >= 3);
+ BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 3)
+ == 0x48);
+ BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 2)
+ == 0x8d);
+ BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 1)
+ == 0x3d);
+ BFD_ASSERT (rel->r_offset + 9 <= input_section->_raw_size);
+ BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4)
+ == 0xe8);
+ BFD_ASSERT (rel + 1 < relend);
+ BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32);
+ memcpy (contents + rel->r_offset - 3,
+ "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12);
+ /* Skip R_X86_64_PLT32. */
+ rel++;
+ continue;
+ }
+
+ if (htab->sgot == NULL)
+ abort ();
+
+ off = htab->tls_ld_got.offset;
+ if (off & 1)
+ off &= ~1;
+ else
+ {
+ Elf_Internal_Rela outrel;
+ Elf64_External_Rela *loc;
+
+ if (htab->srelgot == NULL)
+ abort ();
+
+ outrel.r_offset = (htab->sgot->output_section->vma
+ + htab->sgot->output_offset + off);
+
+ bfd_put_64 (output_bfd, 0,
+ htab->sgot->contents + off);
+ bfd_put_64 (output_bfd, 0,
+ htab->sgot->contents + off + GOT_ENTRY_SIZE);
+ outrel.r_info = ELF64_R_INFO (0, R_X86_64_DTPMOD64);
+ outrel.r_addend = 0;
+ loc = (Elf64_External_Rela *) htab->srelgot->contents;
+ loc += htab->srelgot->reloc_count++;
+ bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
+ htab->tls_ld_got.offset |= 1;
+ }
+ relocation = htab->sgot->output_section->vma
+ + htab->sgot->output_offset + off;
+ unresolved_reloc = false;
+ break;
+
+ case R_X86_64_DTPOFF32:
+ if (info->shared)
+ relocation -= dtpoff_base (info);
+ else
+ relocation = tpoff (info, relocation);
+ break;
+
+ case R_X86_64_TPOFF32:
+ BFD_ASSERT (! info->shared);
+ relocation = tpoff (info, relocation);
+ break;
+
default:
break;
}
@@ -2087,13 +2661,15 @@ elf64_x86_64_finish_dynamic_symbol (output_bfd, info, h, sym)
}
}
- if (h->got.offset != (bfd_vma) -1)
+ if (h->got.offset != (bfd_vma) -1
+ && elf64_x86_64_hash_entry (h)->tls_type != GOT_TLS_GD
+ && elf64_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE)
{
Elf_Internal_Rela rela;
Elf64_External_Rela *loc;
/* This symbol has an entry in the global offset table. Set it
- up. */
+ up. */
if (htab->sgot == NULL || htab->srelgot == NULL)
abort ();
@@ -2351,5 +2927,6 @@ elf64_x86_64_finish_dynamic_sections (output_bfd, info)
#define elf_backend_relocate_section elf64_x86_64_relocate_section
#define elf_backend_size_dynamic_sections elf64_x86_64_size_dynamic_sections
#define elf_backend_object_p elf64_x86_64_elf_object_p
+#define bfd_elf64_mkobject elf64_x86_64_mkobject
#include "elf64-target.h"