class Plugin_manager has
// A pointer to the current plugin. Used while loading plugins.
Plugin_list::iterator current_;
The same iterator is shared by all threads. It is OK to use it to load
plugins since only one thread loads plugins. Avoid sharing Plugin_list
iterator in all other cases.
PR gold/26200
* plugin.cc (Plugin_manager::claim_file): Don't share Plugin_list
iterator.
(Plugin_manager::all_symbols_read): Likewise.
(Plugin_manager::cleanup): Likewise.
Since upgrading to binutils 2.35 I've been experiencing random memory
corruption related crashes with ld.gold --threads. It's caused by
multiple threads concurrently pushing elements onto the shared
std::vector in File_read::record_file_read(). This vector is supposed to
be protected by file_counts_lock, but that is initialized lazily and
might be NULL when File_read::open() is called, in which case
Hold_optional_lock silently skips locking it.
Fix by calling the initialize() method before attempting to acquire the
lock, the same as other places that use file_counts_lock.
PR 26827
* fileread.cc (File_read::open): Ensure file_counts_lock is
initialized.
* testsuite/Makefile.am (check_PROGRAMS): Add a test that passes
-Wl,--threads.
* testsuite/Makefile.in: Regenerate.
Skip bootstrap-test and bootstrap-test-r for LTO build due to different
build IDs.
* Makefile.am (bootstrap-test): Skip for LTO build.
(bootstrap-test-r): Likewise.
Skip incremental_test_2, incremental_test_3, incremental_test_4,
incremental_test_5, incremental_copy_test, incremental_common_test_1
and incremental_comdat_test_1 when -fcf-protection is used to compile
gold since gold doesn't properly support -fcf-protection on Intel CET
enabled OS.
Also skip incremental_copy_test and incremental_comdat_test_1 for GCC 9
or later since they failed with GCC 9 or later.
PR gold/23539
* configure.ac: Check for GCC 9 or later and for -fcf-protection.
* configure: Regenerated.
* testsuite/Makefile.am (check_PROGRAMS): Skip incremental_test_2,
incremental_test_3, incremental_test_4, incremental_test_5,
incremental_copy_test, incremental_common_test_1 and
incremental_comdat_test_1 for -fcf-protection. Also Skip
incremental_copy_test and incremental_comdat_test_1 for GCC 9 or
later.
* testsuite/Makefile.in: Regenerated.
This patch updates GNU_PROPERTY_X86_XXX macros for gold:
1. GNU_PROPERTY_X86_UINT32_AND_XXX: A 4-byte unsigned integer property.
A bit is set if it is set in all relocatable inputs:
#define GNU_PROPERTY_X86_UINT32_AND_LO 0xc0000002
#define GNU_PROPERTY_X86_UINT32_AND_HI 0xc0007fff
2. GNU_PROPERTY_X86_UINT32_OR_XXX: A 4-byte unsigned integer property.
A bit is set if it is set in any relocatable inputs:
#define GNU_PROPERTY_X86_UINT32_OR_LO 0xc0008000
#define GNU_PROPERTY_X86_UINT32_OR_HI 0xc000ffff
3. GNU_PROPERTY_X86_UINT32_OR_AND_XXX: A 4-byte unsigned integer property.
A bit is set if it is set in any relocatable inputs and the property is
present in all relocatable inputs:
#define GNU_PROPERTY_X86_UINT32_OR_AND_LO 0xc0010000
#define GNU_PROPERTY_X86_UINT32_OR_AND_HI 0xc0017fff
4. GNU_PROPERTY_X86_FEATURE_2_NEEDED, GNU_PROPERTY_X86_FEATURE_2_USED
and GNU_PROPERTY_X86_FEATURE_2_XXX bits.
GNU_PROPERTY_X86_FEATURE_1_AND is unchanged. GNU_PROPERTY_X86_ISA_1_USED
and GNU_PROPERTY_X86_ISA_1_NEEDED are updated to better support targeted
processors since GNU_PROPERTY_X86_ISA_1_?86 aren't isn't very useful.
A new set of GNU_PROPERTY_X86_ISA_1_XXX bits are defined. The previous
GNU_PROPERTY_X86_ISA_1_XXX macros are deprecated and renamed to
GNU_PROPERTY_X86_COMPAT_ISA_1_XXX and GNU_PROPERTY_X86_COMPAT_2_ISA_1_XXX.
elfcpp/
* elfcpp.h (GNU_PROPERTY_X86_ISA_1_USED): Renamed to ...
(GNU_PROPERTY_X86_COMPAT_ISA_1_USED): This.
(GNU_PROPERTY_X86_ISA_1_NEEDED): Renamed to ...
(GNU_PROPERTY_X86_COMPAT_ISA_1_NEEDED): This.
(GNU_PROPERTY_X86_UINT32_AND_LO): New.
(GNU_PROPERTY_X86_UINT32_AND_HI): Likewise.
(GNU_PROPERTY_X86_UINT32_OR_LO): Likewise.
(GNU_PROPERTY_X86_UINT32_OR_HI): Likewise.
(GNU_PROPERTY_X86_UINT32_OR_AND_LO): Likewise.
(GNU_PROPERTY_X86_UINT32_OR_AND_HI): Likewise.
(GNU_PROPERTY_X86_COMPAT_2_ISA_1_NEEDED): New.
(GNU_PROPERTY_X86_COMPAT_2_ISA_1_NEEDED): Likewise.
(GNU_PROPERTY_X86_FEATURE_1_AND): Updated to
(GNU_PROPERTY_X86_UINT32_AND_LO + 0).
(GNU_PROPERTY_X86_ISA_1_NEEDED): New. Defined to
GNU_PROPERTY_X86_UINT32_OR_LO + 2.
(GNU_PROPERTY_X86_FEATURE_2_NEEDED): New. Defined to
(GNU_PROPERTY_X86_UINT32_OR_LO + 1).
(GNU_PROPERTY_X86_ISA_1_USED): New. Defined to
GNU_PROPERTY_X86_UINT32_OR_AND_LO + 2.
(GNU_PROPERTY_X86_FEATURE_2_USED): New. Defined to
(GNU_PROPERTY_X86_UINT32_OR_AND_LO + 1).
gold/
* x86_64.cc (Target_x86_64::Target_x86_64): Initialize
feature_2_used_, feature_2_needed_ and object_feature_2_used_.
(Target_x86_64::feature_2_used_): New data member.
(Target_x86_64::feature_2_needed_): Likewise.
(Target_x86_64::object_isa_1_used_): Likewise.
(Target_x86_64::record_gnu_property): Support
GNU_PROPERTY_X86_COMPAT_ISA_1_USED,
GNU_PROPERTY_X86_COMPAT_ISA_1_NEEDED,
GNU_PROPERTY_X86_COMPAT_2_ISA_1_USED,
GNU_PROPERTY_X86_COMPAT_2_ISA_1_NEEDED,
GNU_PROPERTY_X86_FEATURE_2_USED and
GNU_PROPERTY_X86_FEATURE_2_NEEDED.
(Target_x86_64::merge_gnu_properties): Merge FEATURE_2_USED bits.
Initialize object_feature_2_used_.
(Target_x86_64::do_finalize_gnu_properties): Support
GNU_PROPERTY_X86_FEATURE_2_USED and
GNU_PROPERTY_X86_FEATURE_2_NEEDED.
* testsuite/gnu_property_a.S (GNU_PROPERTY_X86_ISA_1_USED): Set
to 0xc0010002.
(GNU_PROPERTY_X86_ISA_1_NEEDED): Set to 0xc0008002.
* testsuite/gnu_property_b.S (GNU_PROPERTY_X86_ISA_1_USED): Set
to 0xc0010002.
(GNU_PROPERTY_X86_ISA_1_NEEDED): Set to 0xc0008002.
* testsuite/gnu_property_c.S (GNU_PROPERTY_X86_ISA_1_USED): Set
to 0xc0010002.
(GNU_PROPERTY_X86_ISA_1_NEEDED): Set to 0xc0008002.
* testsuite/gnu_property_test.sh: Updated.
The NT_GNU_PROPERTY_TYPE_0 note should be aligned to 8 bytes for 64-bit
ELF as specified by gABI. A note section can be only placed in a PT_NOTE
segment with the same alignment.
PR gold/22914
PR gold/23535
* layout.cc (Layout::attach_allocated_section_to_segment): Place
a note section in a PT_NOTE segment with the same alignment. Set
the alignment of the PT_NOTE segment from the alignment of the
note section.
(Layout::create_note): Align the NT_GNU_PROPERTY_TYPE_0 note to 8
bytes for 64-bit ELF.
(Layout::segment_precedes): Place segments with larger alignments
first.
* output.cc (Output_segment::Output_segment): Initialize align_.
* output.h (Output_segment): Add align, set_align and align_.
* testsuite/Makefile.am (gnu_property_test.stdout): Pass -lhSWn
to $(TEST_READELF).
(gnu_property_test): Pass --build-id to ld.
* testsuite/Makefile.in: Regenerated.
* testsuite/gnu_property_test.sh (check_alignment): New.
Use check_alignment to check the NT_GNU_PROPERTY_TYPE_0 note
alignment. Verify that there are 2 PT_NOTE segments.
With
commit 4aebb6312e
Author: Rahul Chaudhry <rahulchaudhry@google.com>
Date: Wed Feb 15 00:37:10 2017 -0800
Improved support for --icf=safe when used with -pie.
we now check opcode with R_X86_64_PC32 relocation, which tell branches
from other instructions. We can enable safe ICF for shared object on
x86-64. Also, global symbols with non-default visibility should be
folded like local symbols.
PR gold/21452
* x86_64.cc (Scan::local_reloc_may_be_function_pointer): Remove
check for shared library.
(Scan::global_reloc_may_be_function_pointer): Remove check for
shared library and symbol visibility.
* testsuite/icf_safe_so_test.cc (bar_static): New function.
(main): Take function address of bar_static and use it.
* testsuite/icf_safe_so_test.sh (arch_specific_safe_fold): Also
check fold on x86-64. Check bar_static isn't folded.
Calling non-pcrel functions from pcrel code requires a stub to set up
r2. Gold created the stub, but an "optimisation" made the stub jump
to the function local entry, ie. r2 was not initialised.
This patch fixes that long branch stub problem, and another that might
occur for plt call stubs to local functions.
bfd/
* elf64-ppc.c (write_plt_relocs_for_local_syms): Don't do local
entry offset optimisation.
gold/
* powerpc.cc (Powerpc_relobj::do_relocate_sections): Don't do
local entry offset optimisation for lplt_section.
(Target_powerpc::Branch_info::make_stub): Don't add local
entry offset to long branch dest passed to
add_long_branch_entry. Do pass st_other bits.
(Stub_table::Branch_stub_ent): Add "other_" field.
(Stub_table::add_long_branch_entry): Add "other" param, and
save.
(Stub_table::branch_stub_size): Adjust long branch offset.
(Stub_table::do_write): Likewise.
(Target_powerpc::Relocate::relocate): Likewise.
GOT relocations can refer directly to a function in a fixed position
executable, unlike ADDR64 which needs a global entry stub, or branch
relocs, which need PLT stubs.
* powerpc.cc (is_got_reloc): New function.
(Target_powerpc::Relocate::relocate): Use it here, exclude GOT
relocs when looking for stubs.
For functions with small (< 256 bytes) stack frames, the current x86
do_calls_non_split ignores --split-stack-adjust-size and, in
combination with __morestack_non_split, supplies a non-split-stack
function with at least 0x100000 (1M) available stack. On powerpc64, a
default of 0x4000 is not large enough to reliably work with the golang
testsuite. This increase the default size to the defacto x86 value.
* options.h (split_stack_adjust_size): Default to 0x100000.
Gold version of commit 3cd7c7d7ef.
* powerpc.cc (Target_powerpc): Rename power10_stubs_ to
power10_relocs_.
(Target_powerpc::set_power10_relocs): New accessor.
(Target_powerpc::set_power10_stubs): Delete.
(Target_powerpc::power10_stubs): Adjust.
(Target_powerpc::has_localentry0): New accessor.
(ld_0_11): New constant.
(glink_eh_frame_fde_64v1, glink_eh_frame_fde_64v2): Adjust.
(glink_eh_frame_fde_64v2_localentry0): New.
(Output_data_glink::pltresolve_size): Update.
(Output_data_glink::add_eh_frame): Use localentry0 version eh_frame.
(Output_data_glink::do_write): Move r2 save to start of ELFv2 stub
and only emit for has_localentry0. Don't use r2 in the stub.
(Target_powerpc::Scan::local, global): Adjust for
set_power10_relocs renaming.
(Target_powerpc::scan_relocs): Warn and reset plt_localentry0_.
This stub doesn't have the r2 store at the beginning.
* powerpc.cc (Target_powerpc::Relocate::relocate): Don't skip
first insn of __tls_get_addr_opt stub.
ppc64 ld optimises sequences like the following
addis 3,13,wot@tprel@ha
lwz 3,wot@tprel@l(3)
to
nop
lwz 3,wot@tprel(13)
when "wot" is located near enough to the thread pointer.
However, the ABI doesn't require that R_PPC64_TPREL16_HA always be on
an addis rt,13,imm instruction, and while ld checked for that on the
high-part instruction it didn't disable the optimisation on the
low-part instruction. This patch fixes that problem, disabling the
tprel optimisation globally if high-part instructions don't pass
sanity checks. The optimisation is also enabled for ppc32, where
before ld.bfd had the code in the wrong place and ld.gold had it in a
block only enabled for ppc64.
bfd/
* elf32-ppc.c (ppc_elf_check_relocs): Set has_tls_reloc for
high part tprel16 relocs.
(ppc_elf_tls_optimize): Sanity check high part tprel16 relocs.
Clear do_tls_opt on odd instructions.
(ppc_elf_relocate_section): Move TPREL16_HA/LO optimisation later.
Don't sanity check them here.
* elf64-ppc.c (ppc64_elf_check_relocs): Set has_tls_reloc for
high part tprel16 relocs.
(ppc64_elf_tls_optimize): Sanity check high part tprel16 relocs.
Clear do_tls_opt on odd instructions.
(ppc64_elf_relocate_section): Don't sanity check TPREL16_HA.
ld/
* testsuite/ld-powerpc/tls32.d: Update for TPREL_HA/LO optimisation.
* testsuite/ld-powerpc/tlsexe32.d: Likewise.
* testsuite/ld-powerpc/tlsldopt32.d: Likewise.
* testsuite/ld-powerpc/tlsmark32.d: Likewise.
* testsuite/ld-powerpc/tlsopt4_32.d: Likewise.
* testsuite/ld-powerpc/tprel.s,
* testsuite/ld-powerpc/tprel.d,
* testsuite/ld-powerpc/tprel32.d: New tests.
* testsuite/ld-powerpc/tprelbad.s,
* testsuite/ld-powerpc/tprelbad.d: New test.
* testsuite/ld-powerpc/powerpc.exp: Run them.
gold/
* powerpc.cc (Target_powerpc): Add tprel_opt_ and accessors.
(Target_powerpc::Scan::local): Sanity check tprel high relocs.
(Target_powerpc::Scan::global): Likewise.
(Target_powerpc::Relocate::relocate): Control tprel optimisation
with tprel_opt_ and enable for 32-bit.
gold version of commit e10a07b32d.
* options.h (DEFINE_enum): Add optional_arg__ param, adjust
all uses.
(General_options): Add --power10-stubs and --no-power10-stubs.
* options.cc (General_options::finalize): Handle --power10-stubs.
* powerpc.cc (set_power10_stubs): Don't set when --power10-stubs=no.
(power10_stubs_auto): New.
(struct Plt_stub_ent): Add toc_ and tocoff_. Don't use a bitfield
for indx_.
(struct Branch_stub_ent): Add toc_and tocoff_. Use bitfields for
iter_, notoc_ and save_res_.
(add_plt_call_entry): Set toc_. Adjust resizing conditions for
--power10-stubs=auto.
(add_long_branch_entry): Set toc_.
(add_eh_frame, define_stub_syms): No longer use const_iterators
for plt and long branch stub iteration.
(build_tls_opt_head, build_tls_opt_tail): Change parameters and
return value. Move tests for __tls_get_addr to callers.
(plt_call_size): Handle --power10-stubs=auto.
(branch_stub_size): Likewise.
(Stub_table::do_write): Likewise.
(relocate): Likewise.
* testsuite/script_test_7.sh: Adjust expected address of the .bss
section.
* testsuite/script_test_9.sh: Do not expect the .init section to
immediately follow the .text section in the mapping of sections to
segments.
At least one C library (uclibc-ng) defines some of these only when
the compiler is GCC. We might as well test for all three cases and
handle any of them being missing.
Very similar code exists in libctf and split between elfcpp and gold:
fix both.
(Also sync up elfcpp with a change made to libctf swap.h a few months
ago: since there is no out-of-line definition of the bswap replacements,
they should be declared static inline, not just inline, to prevent the
linker generating out-of-line references to them.)
PR libctf/25120
libctf/
* configure.ac: Check for bswap_16, bswap_32, and bswap_64 decls.
* swap.h (bswap_16): Do not assume that presence of <byteswap.h>
means this is declared.
(bswap_32): Likewise.
(bswap_64): Likewise.
(bswap_identity_64): Remove, unused.
* configure: Regenerated.
* config.h.in: Likewise.
gold/
* configure.ac: Check for bswap_16, bswap_32, and bswap_64 decls.
* configure: Regenerated.
* config.h.in: Likewise.
elfcpp/
* elfcpp_swap.h (bswap_16): Do not assume that presence of
<byteswap.h> means this is declared. Make static inline, matching
recent change to libctf, since there is no non-inline definition
of these functions.
(bswap_32): Likewise.
(bswap_64): Likewise.
I was playing with passing -std=c99 to an older version of gcc by
using CC="gcc-4 -std=c99", and ran into
cc1plus: error: command line option ‘-std=c99’ is valid for C/ObjC but
not for C++ [-Werror]
This obvious fix uses the correct compiler for a number of gold
testcases.
* testsuite/Makefile.am (export_dynamic_plugin.o): Use CXXCOMPILE.
(plugin_test_wrap_symbols_1.o): Likewise.
(plugin_test_wrap_symbols_2.o): Likewise.
* testsuite/Makefile.in: Regenerate.
These relocations should have had REL in their names, to reflect the
fact that they are pc-relative. Fix that now by adding _PCREL.
I've added some back-compatibility code to support anyone using
.reloc with the old relocations.
include/
* elf/ppc64.h (elf_ppc64_reloc_type): Rename
R_PPC64_GOT_TLSGD34 to R_PPC64_GOT_TLSGD_PCREL34,
R_PPC64_GOT_TLSLD34 to R_PPC64_GOT_TLSLD_PCREL34,
R_PPC64_GOT_TPREL34 to R_PPC64_GOT_TPREL_PCREL34, and
R_PPC64_GOT_DTPREL34 to R_PPC64_GOT_DTPREL_PCREL34.
bfd/
* reloc.c: Rename
BFD_RELOC_PPC64_GOT_TLSGD34 to BFD_RELOC_PPC64_GOT_TLSGD_PCREL34,
BFD_RELOC_PPC64_GOT_TLSLD34 to BFD_RELOC_PPC64_GOT_TLSLD_PCREL34,
BFD_RELOC_PPC64_GOT_TPREL34 to BFD_RELOC_PPC64_GOT_TPREL_PCREL34,
BFD_RELOC_PPC64_GOT_DTPREL34 to BFD_RELOC_PPC64_GOT_DTPREL_PCREL34.
* elf64-ppc.c: Update throughout for reloc renaming.
(ppc64_elf_reloc_name_lookup): Handle old reloc names.
* libbfd.h: Regenerate.
* bfd-in2.h: Regenerate.
gas/
* config/tc-ppc.c: Update throughout for reloc renaming.
elfcpp/
* powerpc.h: Rename
R_PPC64_GOT_TLSGD34 to R_PPC64_GOT_TLSGD_PCREL34,
R_PPC64_GOT_TLSLD34 to R_PPC64_GOT_TLSLD_PCREL34,
R_PPC64_GOT_TPREL34 to R_PPC64_GOT_TPREL_PCREL34, and
R_PPC64_GOT_DTPREL34 to R_PPC64_GOT_DTPREL_PCREL34.
gold/
* powerpc.cc: Update throughout for reloc renaming.
PR 25882
bfd/
* elf32-ppc.c (_bfd_elf_ppc_merge_fp_attributes): Don't init FP
attributes from shared libraries, and do not return an error if
they don't match.
gold/
* powerpc.cc (merge_object_attributes): Replace name param with
obj param. Update callers. Don't init FP attributes from shared
libraries, and do not emit an error if they don't match.
sym->object() could be either a Plugin or Powerpc_relobj. There could
be a situation when Pluginobj would be proccessed in
ppc_object->get_opd_ent(dst_off) as Powerpc_relobj and it leads to the
segmentation fault.
* powerpc.cc (do_gc_mark_symbol): Don't segfault on plugin symbols.
Now that ISA3.1 is out we can finish with the powerxx silliness.
bfd/
* elf64-ppc.c: Rename powerxx to power10 throughout.
gas/
* config/tc-ppc.c (md_assemble): Update for PPC_OPCODE_POWER10
renaming.
* testsuite/gas/ppc/prefix-align.d: Use -mpower10/-Mpower10 in
place of -mfuture/-Mfuture.
* testsuite/gas/ppc/prefix-pcrel.d: Likewise.
* testsuite/gas/ppc/prefix-reloc.d: Likewise.
gold/
* powerpc.cc: Rename powerxx to power10 throughout.
include/
* elf/ppc64.h: Update comment.
* opcode/ppc.h (PPC_OPCODE_POWER10): Rename from PPC_OPCODE_POWERXX.
ld/
* testsuite/ld-powerpc/callstub-1.d: Use -mpower10/-Mpower10 in
place of -mfuture/-Mfuture.
* testsuite/ld-powerpc/notoc2.d: Likewise.
* testsuite/ld-powerpc/powerpc.exp: Likewise.
* testsuite/ld-powerpc/tlsgd.d: Likewise.
* testsuite/ld-powerpc/tlsie.d: Likewise.
* testsuite/ld-powerpc/tlsld.d: Likewise.
opcodes/
* ppc-dis.c (ppc_opts): Add "power10" entry.
(print_insn_powerpc): Update for PPC_OPCODE_POWER10 renaming.
* ppc-opc.c (POWER10): Rename from POWERXX. Update all uses.
Since GCC 10 defaults to -fno-common, add -fcommon to common tests to
force common behavior.
PR gold/25904
* testsuite/Makefile.am (COMMON_TEST_C_CFLAGS): New.
(common_test_1.o): New rule.
(common_test_2.o): Likewise.
(common_test_3.o): Likewise.
(plugin_common_test_1.o): Likewise.
(plugin_common_test_2.o): Likewise.
(common_test_1_v1.o): Likewise.
(common_test_1_v2.o): Likewise.
(common_test_2_pic.o): Compile with $(COMMON_TEST_C_CFLAGS).
(common_test_3_pic.o): Likewise.
* testsuite/Makefile.in: Regenerated.
GCC 9 generates the same function size for Ordering::operator() in
odr_violation1.cc and odr_violation2.cc on x32:
134: 00000000 31 FUNC WEAK DEFAULT 64 _ZN8OrderingclEii
40: 00000000 31 FUNC GLOBAL DEFAULT 10 _ZN8OrderingclEii
This patch makes Ordering::operator() even more complex
134: 00000000 31 FUNC WEAK DEFAULT 64 _ZN8OrderingclEii
42: 00000000 35 FUNC GLOBAL DEFAULT 11 _ZN8OrderingclEii
* testsuite/odr_violation2.cc (Ordering::operator()): Make
expression even more complex.
Handle local IFUNC symbol for APLT like global IFUNC symbol.
PR gold/25872
* x86_64.cc (Output_data_plt_x86_64_bnd::do_address_for_local):
Handle local IFUNC symbol.
(Output_data_plt_x86_64_ibt::do_address_for_local): Likewise.
