Date: Tue, 22 Jan 2019 20:15:59 +0000 (UTC) From: Dimitry Andric <dim@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r343315 - in projects/clang800-import/contrib/llvm/tools/lld: ELF ELF/Arch docs Message-ID: <201901222015.x0MKFx2D032359@repo.freebsd.org>
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Author: dim Date: Tue Jan 22 20:15:58 2019 New Revision: 343315 URL: https://svnweb.freebsd.org/changeset/base/343315 Log: Merge lld release_80 branch r351543, and resolve conflicts. Modified: projects/clang800-import/contrib/llvm/tools/lld/ELF/Arch/X86_64.cpp projects/clang800-import/contrib/llvm/tools/lld/ELF/Config.h projects/clang800-import/contrib/llvm/tools/lld/ELF/Driver.cpp projects/clang800-import/contrib/llvm/tools/lld/ELF/Options.td projects/clang800-import/contrib/llvm/tools/lld/ELF/Relocations.cpp projects/clang800-import/contrib/llvm/tools/lld/ELF/Thunks.cpp projects/clang800-import/contrib/llvm/tools/lld/docs/ld.lld.1 Directory Properties: projects/clang800-import/contrib/llvm/tools/lld/ (props changed) Modified: projects/clang800-import/contrib/llvm/tools/lld/ELF/Arch/X86_64.cpp ============================================================================== --- projects/clang800-import/contrib/llvm/tools/lld/ELF/Arch/X86_64.cpp Tue Jan 22 20:15:01 2019 (r343314) +++ projects/clang800-import/contrib/llvm/tools/lld/ELF/Arch/X86_64.cpp Tue Jan 22 20:15:58 2019 (r343315) @@ -264,15 +264,6 @@ void X86_64<ELFT>::relaxTlsIeToLe(uint8_t *Loc, RelTyp template <class ELFT> void X86_64<ELFT>::relaxTlsLdToLe(uint8_t *Loc, RelType Type, uint64_t Val) const { - // Convert - // leaq bar@tlsld(%rip), %rdi - // callq __tls_get_addr@PLT - // leaq bar@dtpoff(%rax), %rcx - // to - // .word 0x6666 - // .byte 0x66 - // mov %fs:0,%rax - // leaq bar@tpoff(%rax), %rcx if (Type == R_X86_64_DTPOFF64) { write64le(Loc, Val); return; @@ -287,7 +278,37 @@ void X86_64<ELFT>::relaxTlsLdToLe(uint8_t *Loc, RelTyp 0x66, // .byte 0x66 0x64, 0x48, 0x8b, 0x04, 0x25, 0x00, 0x00, 0x00, 0x00, // mov %fs:0,%rax }; - memcpy(Loc - 3, Inst, sizeof(Inst)); + + if (Loc[4] == 0xe8) { + // Convert + // leaq bar@tlsld(%rip), %rdi # 48 8d 3d <Loc> + // callq __tls_get_addr@PLT # e8 <disp32> + // leaq bar@dtpoff(%rax), %rcx + // to + // .word 0x6666 + // .byte 0x66 + // mov %fs:0,%rax + // leaq bar@tpoff(%rax), %rcx + memcpy(Loc - 3, Inst, sizeof(Inst)); + return; + } + + if (Loc[4] == 0xff && Loc[5] == 0x15) { + // Convert + // leaq x@tlsld(%rip),%rdi # 48 8d 3d <Loc> + // call *__tls_get_addr@GOTPCREL(%rip) # ff 15 <disp32> + // to + // .long 0x66666666 + // movq %fs:0,%rax + // See "Table 11.9: LD -> LE Code Transition (LP64)" in + // https://raw.githubusercontent.com/wiki/hjl-tools/x86-psABI/x86-64-psABI-1.0.pdf + Loc[-3] = 0x66; + memcpy(Loc - 2, Inst, sizeof(Inst)); + return; + } + + error(getErrorLocation(Loc - 3) + + "expected R_X86_64_PLT32 or R_X86_64_GOTPCRELX after R_X86_64_TLSLD"); } template <class ELFT> Modified: projects/clang800-import/contrib/llvm/tools/lld/ELF/Config.h ============================================================================== --- projects/clang800-import/contrib/llvm/tools/lld/ELF/Config.h Tue Jan 22 20:15:01 2019 (r343314) +++ projects/clang800-import/contrib/llvm/tools/lld/ELF/Config.h Tue Jan 22 20:15:58 2019 (r343315) @@ -159,6 +159,7 @@ struct Configuration { bool OFormatBinary; bool Omagic; bool OptRemarksWithHotness; + bool PicThunk; bool Pie; bool PrintGcSections; bool PrintIcfSections; Modified: projects/clang800-import/contrib/llvm/tools/lld/ELF/Driver.cpp ============================================================================== --- projects/clang800-import/contrib/llvm/tools/lld/ELF/Driver.cpp Tue Jan 22 20:15:01 2019 (r343314) +++ projects/clang800-import/contrib/llvm/tools/lld/ELF/Driver.cpp Tue Jan 22 20:15:58 2019 (r343315) @@ -1008,6 +1008,7 @@ static void setConfigs(opt::InputArgList &Args) { Config->Endianness = Config->IsLE ? endianness::little : endianness::big; Config->IsMips64EL = (K == ELF64LEKind && M == EM_MIPS); Config->Pic = Config->Pie || Config->Shared; + Config->PicThunk = Args.hasArg(OPT_pic_veneer, Config->Pic); Config->Wordsize = Config->Is64 ? 8 : 4; // ELF defines two different ways to store relocation addends as shown below: Modified: projects/clang800-import/contrib/llvm/tools/lld/ELF/Options.td ============================================================================== --- projects/clang800-import/contrib/llvm/tools/lld/ELF/Options.td Tue Jan 22 20:15:01 2019 (r343314) +++ projects/clang800-import/contrib/llvm/tools/lld/ELF/Options.td Tue Jan 22 20:15:58 2019 (r343315) @@ -255,6 +255,9 @@ defm use_android_relr_tags: B<"use-android-relr-tags", "Use SHT_ANDROID_RELR / DT_ANDROID_RELR* tags instead of SHT_RELR / DT_RELR*", "Use SHT_RELR / DT_RELR* tags (default)">; +def pic_veneer: F<"pic-veneer">, + HelpText<"Always generate position independent thunks (veneers)">; + defm pie: B<"pie", "Create a position independent executable", "Do not create a position independent executable (default)">; Modified: projects/clang800-import/contrib/llvm/tools/lld/ELF/Relocations.cpp ============================================================================== --- projects/clang800-import/contrib/llvm/tools/lld/ELF/Relocations.cpp Tue Jan 22 20:15:01 2019 (r343314) +++ projects/clang800-import/contrib/llvm/tools/lld/ELF/Relocations.cpp Tue Jan 22 20:15:58 2019 (r343315) @@ -356,7 +356,7 @@ static bool needsGot(RelExpr Expr) { static bool isRelExpr(RelExpr Expr) { return isRelExprOneOf<R_PC, R_GOTREL, R_GOTREL_FROM_END, R_MIPS_GOTREL, R_PPC_CALL, R_PPC_CALL_PLT, R_AARCH64_PAGE_PC, - R_RELAX_GOT_PC>(Expr); + R_AARCH64_PLT_PAGE_PC, R_RELAX_GOT_PC>(Expr); } // Returns true if a given relocation can be computed at link-time. Modified: projects/clang800-import/contrib/llvm/tools/lld/ELF/Thunks.cpp ============================================================================== --- projects/clang800-import/contrib/llvm/tools/lld/ELF/Thunks.cpp Tue Jan 22 20:15:01 2019 (r343314) +++ projects/clang800-import/contrib/llvm/tools/lld/ELF/Thunks.cpp Tue Jan 22 20:15:58 2019 (r343315) @@ -722,7 +722,7 @@ Thunk::~Thunk() = default; static Thunk *addThunkAArch64(RelType Type, Symbol &S) { if (Type != R_AARCH64_CALL26 && Type != R_AARCH64_JUMP26) fatal("unrecognized relocation type"); - if (Config->Pic) + if (Config->PicThunk) return make<AArch64ADRPThunk>(S); return make<AArch64ABSLongThunk>(S); } @@ -739,7 +739,7 @@ static Thunk *addThunkPreArmv7(RelType Reloc, Symbol & case R_ARM_JUMP24: case R_ARM_CALL: case R_ARM_THM_CALL: - if (Config->Pic) + if (Config->PicThunk) return make<ARMV5PILongThunk>(S); return make<ARMV5ABSLongThunk>(S); } @@ -794,13 +794,13 @@ static Thunk *addThunkArm(RelType Reloc, Symbol &S) { case R_ARM_PLT32: case R_ARM_JUMP24: case R_ARM_CALL: - if (Config->Pic) + if (Config->PicThunk) return make<ARMV7PILongThunk>(S); return make<ARMV7ABSLongThunk>(S); case R_ARM_THM_JUMP19: case R_ARM_THM_JUMP24: case R_ARM_THM_CALL: - if (Config->Pic) + if (Config->PicThunk) return make<ThumbV7PILongThunk>(S); return make<ThumbV7ABSLongThunk>(S); } @@ -820,7 +820,7 @@ static Thunk *addThunkPPC64(RelType Type, Symbol &S) { if (S.isInPlt()) return make<PPC64PltCallStub>(S); - if (Config->Pic) + if (Config->PicThunk) return make<PPC64PILongBranchThunk>(S); return make<PPC64PDLongBranchThunk>(S); Modified: projects/clang800-import/contrib/llvm/tools/lld/docs/ld.lld.1 ============================================================================== --- projects/clang800-import/contrib/llvm/tools/lld/docs/ld.lld.1 Tue Jan 22 20:15:01 2019 (r343314) +++ projects/clang800-import/contrib/llvm/tools/lld/docs/ld.lld.1 Tue Jan 22 20:15:58 2019 (r343315) @@ -322,6 +322,8 @@ Write optimization remarks in YAML format to .Ar file . .It Fl -opt-remarks-with-hotness Include hotness information in the optimization remarks file. +.It Fl -pic-veneer +Always generate position independent thunks. .It Fl -pie Create a position independent executable. .It Fl -print-gc-sections
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