1 //===--- BPF.cpp - Implement BPF target feature support -------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file implements BPF TargetInfo objects. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "BPF.h" 14 #include "Targets.h" 15 #include "clang/Basic/MacroBuilder.h" 16 #include "clang/Basic/TargetBuiltins.h" 17 #include "llvm/ADT/StringRef.h" 18 19 using namespace clang; 20 using namespace clang::targets; 21 22 static constexpr Builtin::Info BuiltinInfo[] = { 23 #define BUILTIN(ID, TYPE, ATTRS) \ 24 {#ID, TYPE, ATTRS, nullptr, HeaderDesc::NO_HEADER, ALL_LANGUAGES}, 25 #include "clang/Basic/BuiltinsBPF.def" 26 }; 27 28 void BPFTargetInfo::getTargetDefines(const LangOptions &Opts, 29 MacroBuilder &Builder) const { 30 Builder.defineMacro("__bpf__"); 31 Builder.defineMacro("__BPF__"); 32 33 std::string CPU = getTargetOpts().CPU; 34 if (CPU == "probe") { 35 Builder.defineMacro("__BPF_CPU_VERSION__", "0"); 36 return; 37 } 38 if (CPU.empty() || CPU == "generic" || CPU == "v1") { 39 Builder.defineMacro("__BPF_CPU_VERSION__", "1"); 40 return; 41 } 42 43 std::string CpuVerNumStr = CPU.substr(1); 44 Builder.defineMacro("__BPF_CPU_VERSION__", CpuVerNumStr); 45 46 int CpuVerNum = std::stoi(CpuVerNumStr); 47 if (CpuVerNum >= 2) 48 Builder.defineMacro("__BPF_FEATURE_JMP_EXT"); 49 50 if (CpuVerNum >= 3) { 51 Builder.defineMacro("__BPF_FEATURE_JMP32"); 52 Builder.defineMacro("__BPF_FEATURE_ALU32"); 53 } 54 55 if (CpuVerNum >= 4) { 56 Builder.defineMacro("__BPF_FEATURE_LDSX"); 57 Builder.defineMacro("__BPF_FEATURE_MOVSX"); 58 Builder.defineMacro("__BPF_FEATURE_BSWAP"); 59 Builder.defineMacro("__BPF_FEATURE_SDIV_SMOD"); 60 Builder.defineMacro("__BPF_FEATURE_GOTOL"); 61 Builder.defineMacro("__BPF_FEATURE_ST"); 62 } 63 } 64 65 static constexpr llvm::StringLiteral ValidCPUNames[] = {"generic", "v1", "v2", 66 "v3", "v4", "probe"}; 67 68 bool BPFTargetInfo::isValidCPUName(StringRef Name) const { 69 return llvm::is_contained(ValidCPUNames, Name); 70 } 71 72 void BPFTargetInfo::fillValidCPUList(SmallVectorImpl<StringRef> &Values) const { 73 Values.append(std::begin(ValidCPUNames), std::end(ValidCPUNames)); 74 } 75 76 ArrayRef<Builtin::Info> BPFTargetInfo::getTargetBuiltins() const { 77 return llvm::ArrayRef(BuiltinInfo, 78 clang::BPF::LastTSBuiltin - Builtin::FirstTSBuiltin); 79 } 80 81 bool BPFTargetInfo::handleTargetFeatures(std::vector<std::string> &Features, 82 DiagnosticsEngine &Diags) { 83 for (const auto &Feature : Features) { 84 if (Feature == "+alu32") { 85 HasAlu32 = true; 86 } 87 } 88 89 return true; 90 } 91