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Alan Modra f378ab099d PPC64_OPT_LOCALENTRY 
ELFv2 functions with localentry:0 are those with a single entry point,
ie. global entry == local entry, and that have no requirement on r2 or
r12, and guarantee r2 is unchanged on return.  Such an external
function can be called via the PLT without saving r2 or restoring it
on return, avoiding a common load-hit-store for small functions.   The
optimization is attractive.  The TOC pointer load-hit-store is a major
reason why calls to small functions that need no register saves, or
with shrink-wrap, no register saves on a fast path, are slow on
powerpc64le.

To be safe, this optimization needs ld.so support to check that the
run-time matches link-time function implementation.  If a function
in a shared library with st_other localentry non-zero is called
without saving and restoring r2, r2 will be trashed on return, leading
to segfaults.  For that reason the optimization does not happen for
weak functions since a weak definition is a fairly solid hint that the
function will likely be overridden.  I'm also not enabling the
optimization by default unless glibc-2.26 is detected, which should
have the ld.so checks implemented.

bfd/
	* elf64-ppc.c (struct ppc_link_hash_table): Add has_plt_localentry0.
	(ppc64_elf_merge_symbol_attribute): Merge localentry bits from
	dynamic objects.
	(is_elfv2_localentry0): New function.
	(ppc64_elf_tls_setup): Default params->plt_localentry0.
	(plt_stub_size): Adjust size for tls_get_addr_opt stub.
	(build_tls_get_addr_stub): Use a simpler stub when r2 is not saved.
	(ppc64_elf_size_stubs): Leave stub_type as ppc_stub_plt_call for
	optimized localentry:0 stubs.
	(ppc64_elf_build_stubs): Save r2 in ELFv2 __glink_PLTresolve.
	(ppc64_elf_relocate_section): Leave nop unchanged for optimized
	localentry:0 stubs.
	(ppc64_elf_finish_dynamic_sections): Set PPC64_OPT_LOCALENTRY in
	DT_PPC64_OPT.
	* elf64-ppc.h (struct ppc64_elf_params): Add plt_localentry0.
include/
	* elf/ppc64.h (PPC64_OPT_LOCALENTRY): Define.
ld/
	* emultempl/ppc64elf.em (params): Init plt_localentry0 field.
	(enum ppc64_opt): New, replacing OPTION_* defines.  Add
	OPTION_PLT_LOCALENTRY, and OPTION_NO_PLT_LOCALENTRY.
	(PARSE_AND_LIST_*): Support --plt-localentry and --no-plt-localentry.
	* testsuite/ld-powerpc/elfv2so.d: Update.
	* testsuite/ld-powerpc/powerpc.exp (TLS opt 5): Use --no-plt-localentry.
	* testsuite/ld-powerpc/tlsopt5.d: Update.
2017-06-01 22:47:32 +09:30

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2017-06-01 Alan Modra <amodra@gmail.com>
* elf/ppc64.h (PPC64_OPT_LOCALENTRY): Define.
2017-05-31 Eli Zaretskii <eliz@gnu.org>
* environ.h: Add #ifndef guard.
2017-05-30 Anton Kolesov <anton.kolesov@synopsys.com>
* elf/arc-cpu.def: New file.
2017-05-24 Yao Qi <yao.qi@linaro.org>
* dis-asm.h: Move some function declarations to
opcodes/disassemble.h.
2017-05-24 Yao Qi <yao.qi@linaro.org>
* dis-asm.h (disassembler): Update declaration.
2017-05-23 Claudiu Zissulescu <claziss@synopsys.com>
* opcode/arc.h (MAX_INSN_FLGS): Update to 4.
2017-05-22 H.J. Lu <hongjiu.lu@intel.com>
* include/opcode/i386.h (NOTRACK_PREFIX_OPCODE): New.
2017-05-19 Jose E. Marchesi <jose.marchesi@oracle.com>
* elf/sparc.h (ELF_SPARC_HWCAP2_SPARC6): Define.
(ELF_SPARC_HWCAP2_ONADDSUB): Likewise.
(ELF_SPARC_HWCAP2_ONMUL): Likewise.
(ELF_SPARC_HWCAP2_ONDIV): Likewise.
(ELF_SPARC_HWCAP2_DICTUNP): Likewise.
(ELF_SPARC_HWCAP2_FPCMPSHL): Likewise.
(ELF_SPARC_HWCAP2_RLE): Likewise.
(ELF_SPARC_HWCAP2_SHA3): Likewise.
* opcode/sparc.h (sparc_opcode_arch_val): Add SPARC_OPCODE_ARCH_M8
and adjust SPARC_OPCODE_ARCH_MAX.
(HWCAP2_SPARC6): Define.
(HWCAP2_ONADDSUB): Likewise.
(HWCAP2_ONMUL): Likewise.
(HWCAP2_ONDIV): Likewise.
(HWCAP2_DICTUNP): Likewise.
(HWCAP2_FPCMPSHL): Likewise.
(HWCAP2_RLE): Likewise.
(HWCAP2_SHA3): Likewise.
(OPM): Likewise.
(OPMI): Likewise.
(ONFCN): Likewise.
(REVFCN): Likewise.
(SIMM10): Likewise.
2017-05-16 Alan Modra <amodra@gmail.com>
* bfdlink.h (struct bfd_link_hash_entry <non_ir_ref>): Rename to
non_ir_ref_regular.
2017-05-16 Alan Modra <amodra@gmail.com>
* bfdlink.h (struct bfd_link_hash_entry): Update non_ir_ref
comment. Rename dynamic_ref_after_ir_def to non_ir_ref_dynamic.
2017-05-15 Maciej W. Rozycki <macro@imgtec.com>
Matthew Fortune <matthew.fortune@imgtec.com>
* elf/mips.h (AFL_ASE_MIPS16E2): New macro.
(AFL_ASE_MASK): Adjust accordingly.
* opcode/mips.h: Document new operand codes defined.
(mips_operand_type): Add OP_REG28 enum value.
(INSN2_SHORT_ONLY): Update description.
(ASE_MIPS16E2, ASE_MIPS16E2_MT): New macros.
2017-05-14 John David Anglin <danglin@gcc.gnu.org>
* opcode/hppa.h: Fix match and mask for 64-bit bb opcode.
2017-05-10 Claudiu Zissulescu <claziss@synopsys.com>
* elf/arc.h (SHT_ARC_ATTRIBUTES): Define.
(Tag_ARC_*): Define.
(E_ARC_OSABI_V4): Define.
(E_ARC_OSABI_CURRENT): Reassign it.
(TAG_CPU_*): Define.
* opcode/arc-attrs.h: New file.
* opcode/arc.h (insn_subclass_t): Assign enum values.
(insn_subclass_t): Update enum with QUARKSE1, QUARKSE2, and LL64.
(ARC_EA, ARC_CD, ARC_LLOCK, ARC_ATOMIC, ARC_MPY, ARC_MULT)
(ARC_NPS400, ARC_DPFP, ARC_SPFP, ARC_FPU, ARC_FPUDA, ARC_SWAP)
(ARC_NORM, ARC_BSCAN, ARC_UIX, ARC_TSTAMP, ARC_VBFDW)
(ARC_BARREL, ARC_DSPA, ARC_SHIFT, ARC_INTR, ARC_DIV, ARC_XMAC)
(ARC_CRC): Delete.
2017-04-20 H.J. Lu <hongjiu.lu@intel.com>
PR ld/21382
* bfdlink.h (bfd_link_hash_entry): Add dynamic_ref_after_ir_def.
2017-04-19 Alan Modra <amodra@gmail.com>
* bfdlink.h (struct bfd_link_info <dynamic_undefined_weak>):
Revise comment.
2017-04-11 Alan Modra <amodra@gmail.com>
* opcode/ppc.h (PPC_OPCODE_ALTIVEC2): Delete.
(PPC_OPCODE_VSX3): Delete.
(PPC_OPCODE_HTM): Delete.
(PPC_OPCODE_*): Renumber and order chronologically.
(PPC_OPCODE_SPE): Comment on this and other bits used for APUinfo.
2017-04-06 Pip Cet <pipcet@gmail.com>
* dis-asm.h: Add prototypes for wasm32 disassembler.
2017-04-05 Pedro Alves <palves@redhat.com>
* dis-asm.h (disassemble_info) <disassembler_options>: Now a
"const char *".
(next_disassembler_option): Constify.
2017-04-04 H.J. Lu <hongjiu.lu@intel.com>
* elf/common.h (PT_GNU_MBIND_NUM): New.
(PT_GNU_MBIND_LO): Likewise.
(PT_GNU_MBIND_HI): Likewise.
(SHF_GNU_MBIND): Likewise.
2017-04-03 Palmer Dabbelt <palmer@dabbelt.com>
* elf/riscv.h (RISCV_GP_SYMBOL): New define.
2017-03-27 Andrew Waterman <andrew@sifive.com>
* opcode/riscv-opc.h (CSR_PMPCFG0): New define.
(CSR_PMPCFG1): Likewise.
(CSR_PMPCFG2): Likewise.
(CSR_PMPCFG3): Likewise.
(CSR_PMPADDR0): Likewise.
(CSR_PMPADDR1): Likewise.
(CSR_PMPADDR2): Likewise.
(CSR_PMPADDR3): Likewise.
(CSR_PMPADDR4): Likewise.
(CSR_PMPADDR5): Likewise.
(CSR_PMPADDR6): Likewise.
(CSR_PMPADDR7): Likewise.
(CSR_PMPADDR8): Likewise.
(CSR_PMPADDR9): Likewise.
(CSR_PMPADDR10): Likewise.
(CSR_PMPADDR11): Likewise.
(CSR_PMPADDR12): Likewise.
(CSR_PMPADDR13): Likewise.
(CSR_PMPADDR14): Likewise.
(CSR_PMPADDR15): Likewise.
(pmpcfg0): Declare register.
(pmpcfg1): Likewise.
(pmpcfg2): Likewise.
(pmpcfg3): Likewise.
(pmpaddr0): Likewise.
(pmpaddr1): Likewise.
(pmpaddr2): Likewise.
(pmpaddr3): Likewise.
(pmpaddr4): Likewise.
(pmpaddr5): Likewise.
(pmpaddr6): Likewise.
(pmpaddr7): Likewise.
(pmpaddr8): Likewise.
(pmpaddr9): Likewise.
(pmpaddr10): Likewise.
(pmpaddr11): Likewise.
(pmpaddr12): Likewise.
(pmpaddr13): Likewise.
(pmpaddr14): Likewise.
(pmpaddr15): Likewise.
2017-03-30 Pip Cet <pipcet@gmail.com>
* opcode/wasm.h: New file to support wasm32 architecture.
* elf/wasm32.h: Add R_WASM32_32 relocation.
2017-03-29 Alan Modra <amodra@gmail.com>
* opcode/ppc.h (PPC_OPCODE_RAW): Define.
(PPC_OPCODE_*): Make them all unsigned long long constants.
2017-03-27 Pip Cet <pipcet@gmail.com>
* elf/wasm32.h: New file to support wasm32 architecture.
2017-03-27 Rinat Zelig <rinat@mellanox.com>
* opcode/arc.h (insn_class_t): Add ULTRAIP and MISC class.
2017-03-21 Andreas Krebbel <krebbel@linux.vnet.ibm.com>
* opcode/s390.h (S390_INSTR_FLAG_VX2): Remove.
(S390_INSTR_FLAG_FACILITY_MASK): Adjust value.
2017-03-21 Rinat Zelig <rinat@mellanox.com>
* opcode/arc.h (insn_class_t): Add DMA class.
2017-03-16 Nick Clifton <nickc@redhat.com>
* elf/common.h (GNU_BUILD_ATTRIBUTE_SHORT_ENUM): New GNU BUILD
note type.
2017-03-14 Jakub Jelinek <jakub@redhat.com>
PR debug/77589
* dwarf2.def (DW_OP_GNU_variable_value): New opcode.
2017-03-13 Markus Trippelsdorf <markus@trippelsdorf.de>
PR demangler/70909
PR demangler/67264
* demangle.h (struct demangle_component): Add d_printing field.
(cplus_demangle_print): Remove const qualifier from tree
parameter.
(cplus_demangle_print_callback): Likewise.
2017-03-13 Nick Clifton <nickc@redhat.com>
PR binutils/21202
* elf/aarch64.h (R_AARCH64_TLSDESC_LD64_LO12_NC): Rename to
R_AARCH64_TLSDESC_LD64_LO12.
(R_AARCH64_TLSDESC_ADD_LO12_NC): Rename to
R_AARCH64_TLSDESC_ADD_LO12_NC.
2017-03-10 Nick Clifton <nickc@redhat.com>
* elf/common.h (EM_LANAI): New machine number.
(EM_BPF): Likewise.
(EM_WEBASSEMBLY): Likewise.
Move low value, deprecated, numbers to their numerical
equivalents.
2017-03-08 H.J. Lu <hongjiu.lu@intel.com>
PR binutils/21231
* elf/common.h (GNU_PROPERTY_LOPROC): New.
(GNU_PROPERTY_HIPROC): Likewise.
(GNU_PROPERTY_LOUSER): Likewise.
(GNU_PROPERTY_HIUSER): Likewise.
2017-03-01 Nick Clifton <nickc@redhat.com>
* elf/common.h (SHF_GNU_BUILD_NOTE): Define.
(NT_GNU_PROPERTY_TYPE_0): Define.
(NT_GNU_BUILD_ATTRIBUTE_OPEN): Define.
(NT_GNU_BUILD_ATTRIBUTE_FUN): Define.
(GNU_BUILD_ATTRIBUTE_TYPE_NUMERIC): Define.
(GNU_BUILD_ATTRIBUTE_TYPE_STRING): Define.
(GNU_BUILD_ATTRIBUTE_TYPE_BOOL_TRUE): Define.
(GNU_BUILD_ATTRIBUTE_TYPE_BOOL_FALSE): Define.
(GNU_BUILD_ATTRIBUTE_VERSION): Define.
(GNU_BUILD_ATTRIBUTE_STACK_PROT): Define.
(GNU_BUILD_ATTRIBUTE_RELRO): Define.
(GNU_BUILD_ATTRIBUTE_STACK_SIZE): Define.
(GNU_BUILD_ATTRIBUTE_TOOL): Define.
(GNU_BUILD_ATTRIBUTE_ABI): Define.
(GNU_BUILD_ATTRIBUTE_PIC): Define.
(NOTE_GNU_PROPERTY_SECTION_NAME): Define.
(GNU_BUILD_ATTRS_SECTION_NAME): Define.
(GNU_PROPERTY_STACK_SIZE): Define.
(GNU_PROPERTY_NO_COPY_ON_PROTECTED): Define.
(GNU_PROPERTY_X86_ISA_1_USED): Define.
(GNU_PROPERTY_X86_ISA_1_NEEDED): Define.
(GNU_PROPERTY_X86_ISA_1_486): Define.
(GNU_PROPERTY_X86_ISA_1_586): Define.
(GNU_PROPERTY_X86_ISA_1_686): Define.
(GNU_PROPERTY_X86_ISA_1_SSE): Define.
(GNU_PROPERTY_X86_ISA_1_SSE2): Define.
(GNU_PROPERTY_X86_ISA_1_SSE3): Define.
(GNU_PROPERTY_X86_ISA_1_SSSE3): Define.
(GNU_PROPERTY_X86_ISA_1_SSE4_1): Define.
(GNU_PROPERTY_X86_ISA_1_SSE4_2): Define.
(GNU_PROPERTY_X86_ISA_1_AVX): Define.
(GNU_PROPERTY_X86_ISA_1_AVX2): Define.
(GNU_PROPERTY_X86_ISA_1_AVX512F): Define.
(GNU_PROPERTY_X86_ISA_1_AVX512CD): Define.
(GNU_PROPERTY_X86_ISA_1_AVX512ER): Define.
(GNU_PROPERTY_X86_ISA_1_AVX512PF): Define.
(GNU_PROPERTY_X86_ISA_1_AVX512VL): Define.
(GNU_PROPERTY_X86_ISA_1_AVX512DQ): Define.
(GNU_PROPERTY_X86_ISA_1_AVX512BW): Define.
2017-02-28 Peter Bergner <bergner@vnet.ibm.com>
* dis-asm.h (disasm_options_t): New typedef.
(parse_arm_disassembler_option): Remove prototype.
(set_arm_regname_option): Likewise.
(get_arm_regnames): Likewise.
(get_arm_regname_num_options): Likewise.
(disassemble_init_s390): New prototype.
(disassembler_options_powerpc): Likewise.
(disassembler_options_arm): Likewise.
(disassembler_options_s390): Likewise.
(remove_whitespace_and_extra_commas): Likewise.
(disassembler_options_cmp): Likewise.
(next_disassembler_option): New inline function.
(FOR_EACH_DISASSEMBLER_OPTION): New macro.
2017-02-28 Alan Modra <amodra@gmail.com>
* elf/ppc64.h (R_PPC64_16DX_HA): New. Expand fake reloc comment.
* elf/ppc.h (R_PPC_16DX_HA): Likewise.
2017-02-24 Richard Sandiford <richard.sandiford@arm.com>
* opcode/aarch64.h (AARCH64_OPND_SVE_ADDR_RI_S4x16)
(AARCH64_OPND_SVE_IMM_ROT1, AARCH64_OPND_SVE_IMM_ROT2)
(AARCH64_OPND_SVE_Zm3_INDEX, AARCH64_OPND_SVE_Zm3_22_INDEX)
(AARCH64_OPND_SVE_Zm4_INDEX): New aarch64_opnds.
2017-02-24 Richard Sandiford <richard.sandiford@arm.com>
* opcode/aarch64.h (AARCH64_FEATURE_COMPNUM): New macro.
(AARCH64_ARCH_V8_3): Include AARCH64_FEATURE_COMPNUM.
2017-02-22 Andrew Waterman <andrew@sifive.com>
* opcode/riscv-opc.h (CSR_SCOUNTEREN): New define.
(CSR_MCOUNTEREN): Likewise.
(scounteren): Declare register.
(mcounteren): Likewise.
2017-02-14 Andrew Waterman <andrew@sifive.com>
* opcode/riscv-opc.h (MATCH_SFENCE_VMA): New define.
(MASK_SFENCE_VMA): Likewise.
(sfence_vma): Declare instruction.
2017-02-14 Alan Modra <amodra@gmail.com>
PR 21118
* opcode/ppc.h (PPC_OPERAND_*): Reassign values, regs first.
(PPC_OPERAND_SPR, PPC_OPERAND_GQR): Define.
2017-01-24 Dimitar Dimitrov <dimitar@dinux.eu>
* opcode/hppa.h: Clarify that file is part of GNU opcodes.
* opcode/i860.h: Ditto.
* opcode/nios2.h: Ditto.
* opcode/nios2r1.h: Ditto.
* opcode/nios2r2.h: Ditto.
* opcode/pru.h: Ditto.
2017-01-24 Alan Hayward <alan.hayward@arm.com>
* elf/common.h (NT_ARM_SVE): Define.
2017-01-04 Jiong Wang <jiong.wang@arm.com>
* dwarf2.def: Sync with mainline gcc sources.
2017-01-04 Richard Earnshaw <rearnsha@arm.com>
Jiong Wang <jiong.wang@arm.com>
* dwarf2.def (DW_OP_AARCH64_operation): Reserve the number 0xea.
(DW_CFA_GNU_window_save): Comments the multiplexing on AArch64.
2017-01-04 Szabolcs Nagy <szabolcs.nagy@arm.com>
* opcode/aarch64.h (AARCH64_FEATURE_RCPC): Define.
(AARCH64_ARCH_V8_3): Update.
2017-01-03 Kito Cheng <kito.cheng@gmail.com>
* opcode/riscv-opc.h: Add support for the "q" ISA extension.
2017-01-03 Nick Clifton <nickc@redhat.com>
* dwarf2.def: Sync with mainline gcc sources
* dwarf2.h: Likewise.
2016-12-21 Jakub Jelinek <jakub@redhat.com>
* dwarf2.def (DW_FORM_ref_sup): Renamed to ...
(DW_FORM_ref_sup4): ... this. New form.
(DW_FORM_ref_sup8): New form.
2016-10-17 Jakub Jelinek <jakub@redhat.com>
* dwarf2.h (enum dwarf_calling_convention): Add new DWARF5
calling convention codes.
(enum dwarf_line_number_content_type): New.
(enum dwarf_location_list_entry_type): Add DWARF5 DW_LLE_*
codes.
(enum dwarf_source_language): Add new DWARF5 DW_LANG_* codes.
(enum dwarf_macro_record_type): Add DWARF5 DW_MACRO_* codes.
(enum dwarf_name_index_attribute): New.
(enum dwarf_range_list_entry): New.
(enum dwarf_unit_type): New.
* dwarf2.def: Add new DWARF5 DW_TAG_*, DW_FORM_*, DW_AT_*,
DW_OP_* and DW_ATE_* entries.
2016-08-15 Jakub Jelinek <jakub@redhat.com>
* dwarf2.def (DW_AT_string_length_bit_size,
DW_AT_string_length_byte_size): New attributes.
2016-08-12 Alexandre Oliva <aoliva@redhat.com>
PR debug/63240
* dwarf2.def (DW_AT_deleted, DW_AT_defaulted): New.
* dwarf2.h (enum dwarf_defaulted_attribute): New.
2017-01-02 Alan Modra <amodra@gmail.com>
Update year range in copyright notice of all files.
For older changes see ChangeLog-2016
Copyright (C) 2017 Free Software Foundation, Inc.
Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.
Local Variables:
mode: change-log
left-margin: 8
fill-column: 74
version-control: never
End:
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