708084ec37
These headers used to be guarded only on PowerPC64 Linux or FreeBSD, but they can also be enabled for AIX OS target since it's big-endian ready. Reviewed By: shchenz Differential Revision: https://reviews.llvm.org/D129461
300 lines
11 KiB
C++
300 lines
11 KiB
C++
//===--- AIX.cpp - AIX ToolChain Implementations ----------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "AIX.h"
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#include "Arch/PPC.h"
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#include "CommonArgs.h"
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#include "clang/Driver/Compilation.h"
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#include "clang/Driver/Options.h"
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#include "clang/Driver/SanitizerArgs.h"
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#include "llvm/Option/ArgList.h"
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#include "llvm/Support/Path.h"
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using AIX = clang::driver::toolchains::AIX;
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using namespace clang::driver;
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using namespace clang::driver::tools;
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using namespace clang::driver::toolchains;
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using namespace llvm::opt;
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using namespace llvm::sys;
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void aix::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
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const InputInfo &Output,
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const InputInfoList &Inputs,
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const ArgList &Args,
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const char *LinkingOutput) const {
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ArgStringList CmdArgs;
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const bool IsArch32Bit = getToolChain().getTriple().isArch32Bit();
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const bool IsArch64Bit = getToolChain().getTriple().isArch64Bit();
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// Only support 32 and 64 bit.
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if (!IsArch32Bit && !IsArch64Bit)
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llvm_unreachable("Unsupported bit width value.");
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// Specify the mode in which the as(1) command operates.
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if (IsArch32Bit) {
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CmdArgs.push_back("-a32");
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} else {
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// Must be 64-bit, otherwise asserted already.
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CmdArgs.push_back("-a64");
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}
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// Accept any mixture of instructions.
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// On Power for AIX and Linux, this behaviour matches that of GCC for both the
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// user-provided assembler source case and the compiler-produced assembler
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// source case. Yet XL with user-provided assembler source would not add this.
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CmdArgs.push_back("-many");
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Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
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// Specify assembler output file.
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assert((Output.isFilename() || Output.isNothing()) && "Invalid output.");
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if (Output.isFilename()) {
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CmdArgs.push_back("-o");
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CmdArgs.push_back(Output.getFilename());
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}
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// Specify assembler input file.
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// The system assembler on AIX takes exactly one input file. The driver is
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// expected to invoke as(1) separately for each assembler source input file.
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if (Inputs.size() != 1)
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llvm_unreachable("Invalid number of input files.");
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const InputInfo &II = Inputs[0];
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assert((II.isFilename() || II.isNothing()) && "Invalid input.");
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if (II.isFilename())
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CmdArgs.push_back(II.getFilename());
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const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("as"));
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C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(),
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Exec, CmdArgs, Inputs, Output));
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}
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void aix::Linker::ConstructJob(Compilation &C, const JobAction &JA,
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const InputInfo &Output,
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const InputInfoList &Inputs, const ArgList &Args,
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const char *LinkingOutput) const {
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const AIX &ToolChain = static_cast<const AIX &>(getToolChain());
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const Driver &D = ToolChain.getDriver();
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ArgStringList CmdArgs;
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const bool IsArch32Bit = ToolChain.getTriple().isArch32Bit();
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const bool IsArch64Bit = ToolChain.getTriple().isArch64Bit();
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// Only support 32 and 64 bit.
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if (!(IsArch32Bit || IsArch64Bit))
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llvm_unreachable("Unsupported bit width value.");
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// Force static linking when "-static" is present.
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if (Args.hasArg(options::OPT_static))
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CmdArgs.push_back("-bnso");
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// Add options for shared libraries.
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if (Args.hasArg(options::OPT_shared)) {
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CmdArgs.push_back("-bM:SRE");
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CmdArgs.push_back("-bnoentry");
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}
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// PGO instrumentation generates symbols belonging to special sections, and
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// the linker needs to place all symbols in a particular section together in
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// memory; the AIX linker does that under an option.
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if (Args.hasFlag(options::OPT_fprofile_arcs, options::OPT_fno_profile_arcs,
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false) ||
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Args.hasFlag(options::OPT_fprofile_generate,
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options::OPT_fno_profile_generate, false) ||
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Args.hasFlag(options::OPT_fprofile_generate_EQ,
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options::OPT_fno_profile_generate, false) ||
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Args.hasFlag(options::OPT_fprofile_instr_generate,
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options::OPT_fno_profile_instr_generate, false) ||
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Args.hasFlag(options::OPT_fprofile_instr_generate_EQ,
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options::OPT_fno_profile_instr_generate, false) ||
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Args.hasFlag(options::OPT_fcs_profile_generate,
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options::OPT_fno_profile_generate, false) ||
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Args.hasFlag(options::OPT_fcs_profile_generate_EQ,
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options::OPT_fno_profile_generate, false) ||
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Args.hasArg(options::OPT_fcreate_profile) ||
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Args.hasArg(options::OPT_coverage))
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CmdArgs.push_back("-bdbg:namedsects:ss");
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// Specify linker output file.
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assert((Output.isFilename() || Output.isNothing()) && "Invalid output.");
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if (Output.isFilename()) {
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CmdArgs.push_back("-o");
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CmdArgs.push_back(Output.getFilename());
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}
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// Set linking mode (i.e., 32/64-bit) and the address of
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// text and data sections based on arch bit width.
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if (IsArch32Bit) {
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CmdArgs.push_back("-b32");
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CmdArgs.push_back("-bpT:0x10000000");
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CmdArgs.push_back("-bpD:0x20000000");
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} else {
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// Must be 64-bit, otherwise asserted already.
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CmdArgs.push_back("-b64");
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CmdArgs.push_back("-bpT:0x100000000");
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CmdArgs.push_back("-bpD:0x110000000");
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}
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auto getCrt0Basename = [&Args, IsArch32Bit] {
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// Enable gprofiling when "-pg" is specified.
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if (Args.hasArg(options::OPT_pg))
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return IsArch32Bit ? "gcrt0.o" : "gcrt0_64.o";
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// Enable profiling when "-p" is specified.
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else if (Args.hasArg(options::OPT_p))
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return IsArch32Bit ? "mcrt0.o" : "mcrt0_64.o";
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else
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return IsArch32Bit ? "crt0.o" : "crt0_64.o";
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};
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if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles,
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options::OPT_shared)) {
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CmdArgs.push_back(
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Args.MakeArgString(ToolChain.GetFilePath(getCrt0Basename())));
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CmdArgs.push_back(Args.MakeArgString(
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ToolChain.GetFilePath(IsArch32Bit ? "crti.o" : "crti_64.o")));
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}
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// Collect all static constructor and destructor functions in both C and CXX
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// language link invocations. This has to come before AddLinkerInputs as the
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// implied option needs to precede any other '-bcdtors' settings or
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// '-bnocdtors' that '-Wl' might forward.
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CmdArgs.push_back("-bcdtors:all:0:s");
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// Specify linker input file(s).
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AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
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// Add directory to library search path.
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Args.AddAllArgs(CmdArgs, options::OPT_L);
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ToolChain.AddFilePathLibArgs(Args, CmdArgs);
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ToolChain.addProfileRTLibs(Args, CmdArgs);
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if (getToolChain().ShouldLinkCXXStdlib(Args))
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getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs);
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if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
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AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
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// Support POSIX threads if "-pthreads" or "-pthread" is present.
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if (Args.hasArg(options::OPT_pthreads, options::OPT_pthread))
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CmdArgs.push_back("-lpthreads");
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if (D.CCCIsCXX())
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CmdArgs.push_back("-lm");
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CmdArgs.push_back("-lc");
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}
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const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
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C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(),
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Exec, CmdArgs, Inputs, Output));
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}
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/// AIX - AIX tool chain which can call as(1) and ld(1) directly.
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AIX::AIX(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
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: ToolChain(D, Triple, Args) {
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ParseInlineAsmUsingAsmParser = Args.hasFlag(
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options::OPT_fintegrated_as, options::OPT_fno_integrated_as, true);
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getLibraryPaths().push_back(getDriver().SysRoot + "/usr/lib");
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}
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// Returns the effective header sysroot path to use.
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// This comes from either -isysroot or --sysroot.
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llvm::StringRef
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AIX::GetHeaderSysroot(const llvm::opt::ArgList &DriverArgs) const {
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if (DriverArgs.hasArg(options::OPT_isysroot))
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return DriverArgs.getLastArgValue(options::OPT_isysroot);
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if (!getDriver().SysRoot.empty())
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return getDriver().SysRoot;
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return "/";
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}
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void AIX::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
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ArgStringList &CC1Args) const {
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// Return if -nostdinc is specified as a driver option.
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if (DriverArgs.hasArg(options::OPT_nostdinc))
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return;
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llvm::StringRef Sysroot = GetHeaderSysroot(DriverArgs);
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const Driver &D = getDriver();
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if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
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SmallString<128> P(D.ResourceDir);
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// Add the PowerPC intrinsic headers (<resource>/include/ppc_wrappers)
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path::append(P, "include", "ppc_wrappers");
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addSystemInclude(DriverArgs, CC1Args, P);
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// Add the Clang builtin headers (<resource>/include)
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addSystemInclude(DriverArgs, CC1Args, path::parent_path(P.str()));
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}
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// Return if -nostdlibinc is specified as a driver option.
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if (DriverArgs.hasArg(options::OPT_nostdlibinc))
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return;
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// Add <sysroot>/usr/include.
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SmallString<128> UP(Sysroot);
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path::append(UP, "/usr/include");
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addSystemInclude(DriverArgs, CC1Args, UP.str());
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}
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void AIX::AddClangCXXStdlibIncludeArgs(
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const llvm::opt::ArgList &DriverArgs,
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llvm::opt::ArgStringList &CC1Args) const {
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if (DriverArgs.hasArg(options::OPT_nostdinc) ||
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DriverArgs.hasArg(options::OPT_nostdincxx) ||
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DriverArgs.hasArg(options::OPT_nostdlibinc))
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return;
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switch (GetCXXStdlibType(DriverArgs)) {
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case ToolChain::CST_Libstdcxx:
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llvm::report_fatal_error(
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"picking up libstdc++ headers is unimplemented on AIX");
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case ToolChain::CST_Libcxx: {
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llvm::StringRef Sysroot = GetHeaderSysroot(DriverArgs);
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SmallString<128> PathCPP(Sysroot);
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llvm::sys::path::append(PathCPP, "opt/IBM/openxlCSDK", "include", "c++",
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"v1");
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addSystemInclude(DriverArgs, CC1Args, PathCPP.str());
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// Required in order to suppress conflicting C++ overloads in the system
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// libc headers that were used by XL C++.
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CC1Args.push_back("-D__LIBC_NO_CPP_MATH_OVERLOADS__");
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return;
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}
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}
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llvm_unreachable("Unexpected C++ library type; only libc++ is supported.");
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}
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void AIX::AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args,
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llvm::opt::ArgStringList &CmdArgs) const {
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switch (GetCXXStdlibType(Args)) {
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case ToolChain::CST_Libstdcxx:
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llvm::report_fatal_error("linking libstdc++ unimplemented on AIX");
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case ToolChain::CST_Libcxx:
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CmdArgs.push_back("-lc++");
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if (Args.hasArg(options::OPT_fexperimental_library))
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CmdArgs.push_back("-lc++experimental");
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CmdArgs.push_back("-lc++abi");
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return;
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}
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llvm_unreachable("Unexpected C++ library type; only libc++ is supported.");
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}
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ToolChain::CXXStdlibType AIX::GetDefaultCXXStdlibType() const {
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return ToolChain::CST_Libcxx;
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}
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ToolChain::RuntimeLibType AIX::GetDefaultRuntimeLibType() const {
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return ToolChain::RLT_CompilerRT;
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}
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auto AIX::buildAssembler() const -> Tool * { return new aix::Assembler(*this); }
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auto AIX::buildLinker() const -> Tool * { return new aix::Linker(*this); }
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