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Support AARCH64_TLSLD_ADD_DTPREL_* relocations. 

Also Change _TLS_MODULE_BASE_. Always let it point to the start
of TLS segment.

2015-03-28  Jing Yu  <jingyu@google.com>

	* aarch64-reloc.def: New TLSLD_ADD_DTPREL_HI12,
	TLSLD_ADD_DTPREL_LO12_NC.
	* aarch64.cc (Target_aarch64::define_tls_base_symbol): Always
	let _TLS_MODULE_BASE_ point to the start of tls segment.
	(Target_aarch64::optimize_tls_reloc): Add cases for
	R_AARCH64_TLSLD_ADD_DTPREL_HI12 and
	R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC.
	(Target_aarch64::Scan::local): Likewise.
	(Target_aarch64::Scan::global): Likewise.
	(Target_aarch64::Relocate::relocate): Likewise.
	(Target_aarch64::Relocate::relocate_tls): Likewise. And remove
	subtracting tls segment size from symbol value for
	TLSLD_*_DTPREL relocations.
This commit is contained in:
Jing Yu 2015-03-30 14:06:12 -07:00
parent 5675acd9d4
commit 6b0ad2ebf6
3 changed files with 34 additions and 9 deletions
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16
gold/ChangeLog
View File

@ -1,3 +1,19 @@
2015-03-30 Jing Yu <jingyu@google.com>
* aarch64-reloc.def: New TLSLD_ADD_DTPREL_HI12,
TLSLD_ADD_DTPREL_LO12_NC.
* aarch64.cc (Target_aarch64::define_tls_base_symbol): Always let
_TLS_MODULE_BASE_ point to the start of tls segment.
(Target_aarch64::optimize_tls_reloc): Add cases for
R_AARCH64_TLSLD_ADD_DTPREL_HI12 and
R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC.
(Target_aarch64::Scan::local): Likewise.
(Target_aarch64::Scan::global): Likewise.
(Target_aarch64::Relocate::relocate): Likewise.
(Target_aarch64::Relocate::relocate_tls): Likewise. And remove
subtracting tls segment size from symbol value for TLSLD_*_DTPREL
relocations.
2015-03-27 Rafael Ávila de Espíndola <rafael.espindola@gmail.com>
* merge.cc (Object_merge_map::add_mapping): call

2
gold/aarch64-reloc.def
View File

@ -71,6 +71,8 @@ ARD(TLSLD_ADR_PAGE21 , STATIC , AARCH64 , Y, -1, 32,32
ARD(TLSLD_ADD_LO12_NC , STATIC , AARCH64 , Y, -1, 0,0 , 0,11 , Symbol::TLS_REF , ADD )
ARD(TLSLD_MOVW_DTPREL_G1 , STATIC , AARCH64 , Y, 1, 32,32 , 16,31 , Symbol::TLS_REF , ADRP )
ARD(TLSLD_MOVW_DTPREL_G0_NC , STATIC , AARCH64 , Y, 0, 0,0 , 0,15 , Symbol::TLS_REF , MOVW )
ARD(TLSLD_ADD_DTPREL_HI12 , STATIC , AARCH64 , Y, -1, 0,24 , 12,23 , Symbol::TLS_REF , ADD )
ARD(TLSLD_ADD_DTPREL_LO12_NC , STATIC , AARCH64 , Y, -1, 0,0 , 0,11 , Symbol::TLS_REF , ADD )
// Above is from Table 4-16, Local Dynamic TLS relocations, 517-573.
ARD(TLSIE_MOVW_GOTTPREL_G1 , STATIC , AARCH64 , N, -1, 32,32 , 16,31 , Symbol::TLS_REF , MOVW )

25
gold/aarch64.cc
View File

@ -4446,16 +4446,14 @@ Target_aarch64<size, big_endian>::define_tls_base_symbol(
Output_segment* tls_segment = layout->tls_segment();
if (tls_segment != NULL)
{
bool is_exec = parameters->options().output_is_executable();
// _TLS_MODULE_BASE_ always points to the beginning of tls segment.
symtab->define_in_output_segment("_TLS_MODULE_BASE_", NULL,
Symbol_table::PREDEFINED,
tls_segment, 0, 0,
elfcpp::STT_TLS,
elfcpp::STB_LOCAL,
elfcpp::STV_HIDDEN, 0,
(is_exec
? Symbol::SEGMENT_END
: Symbol::SEGMENT_START),
Symbol::SEGMENT_START,
true);
}
this->tls_base_symbol_defined_ = true;
@ -4546,6 +4544,8 @@ Target_aarch64<size, big_endian>::optimize_tls_reloc(bool is_final,
case elfcpp::R_AARCH64_TLSLD_ADD_LO12_NC:
case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G1:
case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G0_NC:
case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_HI12:
case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC:
// These are Local-Dynamic, which refer to local symbols in the
// dynamic TLS block. Since we know that we generating an
// executable, we can switch to Local-Exec.
@ -4894,6 +4894,8 @@ Target_aarch64<size, big_endian>::Scan::local(
case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G1:
case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G0_NC:
case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_HI12:
case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC:
break;
case elfcpp::R_AARCH64_TLSDESC_ADR_PAGE21:
@ -5218,7 +5220,9 @@ Target_aarch64<size, big_endian>::Scan::global(
break;
case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G1:
case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G0_NC: // Other local dynamic
case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G0_NC:
case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_HI12:
case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC: // Other local dynamic
break;
case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
@ -5784,6 +5788,8 @@ Target_aarch64<size, big_endian>::Relocate::relocate(
case elfcpp::R_AARCH64_TLSLD_ADD_LO12_NC:
case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G1:
case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G0_NC:
case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_HI12:
case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC:
case elfcpp::R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21:
case elfcpp::R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC:
case elfcpp::R_AARCH64_TLSLE_MOVW_TPREL_G2:
@ -5981,7 +5987,9 @@ Target_aarch64<size, big_endian>::Relocate::relocate_tls(
break;
case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G1:
case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G0_NC: // Other local-dynamic
case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G0_NC:
case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_HI12:
case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC: // Other local-dynamic
{
AArch64_address value = psymval->value(object, 0);
if (tlsopt == tls::TLSOPT_TO_LE)
@ -5992,9 +6000,6 @@ Target_aarch64<size, big_endian>::Relocate::relocate_tls(
|| issue_undefined_symbol_error(gsym));
return aarch64_reloc_funcs::STATUS_BAD_RELOC;
}
// If building executable, _TLS_MODULE_BASE_ points to segment
// end. Thus we must subtract it from value.
value -= tls_segment->memsz();
}
switch (r_type)
{
@ -6004,6 +6009,8 @@ Target_aarch64<size, big_endian>::Relocate::relocate_tls(
break;
case elfcpp::R_AARCH64_TLSLD_MOVW_DTPREL_G0_NC:
case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_HI12:
case elfcpp::R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC:
return aarch64_reloc_funcs::template rela_general<32>(
view, value, addend, reloc_property);
break;