Author: tmsriram Date: Wed Oct 19 15:24:06 2016 New Revision: 284638 URL: http://llvm.org/viewvc/llvm-project?rev=284638&view=rev Log: New clang option -mpie-copy-relocations to use copy relocations for PIE builds.
Differential Revision: https://reviews.llvm.org/D19996 Modified: cfe/trunk/include/clang/Driver/Options.td cfe/trunk/include/clang/Frontend/CodeGenOptions.def cfe/trunk/lib/CodeGen/BackendUtil.cpp cfe/trunk/lib/Driver/Tools.cpp cfe/trunk/lib/Frontend/CompilerInvocation.cpp Modified: cfe/trunk/include/clang/Driver/Options.td URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/Options.td?rev=284638&r1=284637&r2=284638&view=diff ============================================================================== --- cfe/trunk/include/clang/Driver/Options.td (original) +++ cfe/trunk/include/clang/Driver/Options.td Wed Oct 19 15:24:06 2016 @@ -1691,6 +1691,10 @@ def mno_implicit_float : Flag<["-"], "mn def mimplicit_float : Flag<["-"], "mimplicit-float">, Group<m_Group>; def mrecip : Flag<["-"], "mrecip">, Group<m_Group>; def mrecip_EQ : CommaJoined<["-"], "mrecip=">, Group<m_Group>, Flags<[CC1Option]>; +def mpie_copy_relocations : Flag<["-"], "mpie-copy-relocations">, Group<m_Group>, + Flags<[CC1Option]>, + HelpText<"Use copy relocations support for PIE builds">; +def mno_pie_copy_relocations : Flag<["-"], "mno-pie-copy-relocations">, Group<m_Group>; def mx87 : Flag<["-"], "mx87">, Group<m_x86_Features_Group>; def m80387 : Flag<["-"], "m80387">, Alias<mx87>; def msse2 : Flag<["-"], "msse2">, Group<m_x86_Features_Group>; Modified: cfe/trunk/include/clang/Frontend/CodeGenOptions.def URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Frontend/CodeGenOptions.def?rev=284638&r1=284637&r2=284638&view=diff ============================================================================== --- cfe/trunk/include/clang/Frontend/CodeGenOptions.def (original) +++ cfe/trunk/include/clang/Frontend/CodeGenOptions.def Wed Oct 19 15:24:06 2016 @@ -252,6 +252,9 @@ VALUE_CODEGENOPT(EmitCheckPathComponents /// Whether to report the hotness of the code region for optimization remarks. CODEGENOPT(DiagnosticsWithHotness, 1, 0) +/// Whether copy relocations support is available when building as PIE. +CODEGENOPT(PIECopyRelocations, 1, 0) + #undef CODEGENOPT #undef ENUM_CODEGENOPT #undef VALUE_CODEGENOPT Modified: cfe/trunk/lib/CodeGen/BackendUtil.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/BackendUtil.cpp?rev=284638&r1=284637&r2=284638&view=diff ============================================================================== --- cfe/trunk/lib/CodeGen/BackendUtil.cpp (original) +++ cfe/trunk/lib/CodeGen/BackendUtil.cpp Wed Oct 19 15:24:06 2016 @@ -595,6 +595,8 @@ void EmitAssemblyHelper::CreateTargetMac Options.MCOptions.MCNoExecStack = CodeGenOpts.NoExecStack; Options.MCOptions.MCIncrementalLinkerCompatible = CodeGenOpts.IncrementalLinkerCompatible; + Options.MCOptions.MCPIECopyRelocations = + CodeGenOpts.PIECopyRelocations; Options.MCOptions.MCFatalWarnings = CodeGenOpts.FatalWarnings; Options.MCOptions.AsmVerbose = CodeGenOpts.AsmVerbose; Options.MCOptions.PreserveAsmComments = CodeGenOpts.PreserveAsmComments; Modified: cfe/trunk/lib/Driver/Tools.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Tools.cpp?rev=284638&r1=284637&r2=284638&view=diff ============================================================================== --- cfe/trunk/lib/Driver/Tools.cpp (original) +++ cfe/trunk/lib/Driver/Tools.cpp Wed Oct 19 15:24:06 2016 @@ -4499,6 +4499,12 @@ void Clang::ConstructJob(Compilation &C, CmdArgs.push_back("-mms-bitfields"); } + if (Args.hasFlag(options::OPT_mpie_copy_relocations, + options::OPT_mno_pie_copy_relocations, + false)) { + CmdArgs.push_back("-mpie-copy-relocations"); + } + // This is a coarse approximation of what llvm-gcc actually does, both // -fasynchronous-unwind-tables and -fnon-call-exceptions interact in more // complicated ways. Modified: cfe/trunk/lib/Frontend/CompilerInvocation.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Frontend/CompilerInvocation.cpp?rev=284638&r1=284637&r2=284638&view=diff ============================================================================== --- cfe/trunk/lib/Frontend/CompilerInvocation.cpp (original) +++ cfe/trunk/lib/Frontend/CompilerInvocation.cpp Wed Oct 19 15:24:06 2016 @@ -586,6 +586,8 @@ static bool ParseCodeGenArgs(CodeGenOpti Opts.RelaxAll = Args.hasArg(OPT_mrelax_all); Opts.IncrementalLinkerCompatible = Args.hasArg(OPT_mincremental_linker_compatible); + Opts.PIECopyRelocations = + Args.hasArg(OPT_mpie_copy_relocations); Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer); Opts.SaveTempLabels = Args.hasArg(OPT_msave_temp_labels); Opts.NoDwarfDirectoryAsm = Args.hasArg(OPT_fno_dwarf_directory_asm); _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
