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This re-applies #94241 after fixing buildbot failure, see https://lab.llvm.org/buildbot/#/builders/51/builds/570 According to standard, `constexpr` variables and `const` variables initialized with constant expressions can be used in lambdas w/o capturing - see https://en.cppreference.com/w/cpp/language/lambda. However, MSVC used on buildkite seems to ignore that rule and does not allow using such uncaptured variables in lambdas: we have "error C3493: 'Mask16' cannot be implicitly captured because no default capture mode has been specified" - see https://buildkite.com/llvm-project/github-pull-requests/builds/73238 Explicitly capturing such a variable, however, makes buildbot fail with "error: lambda capture 'Mask16' is not required to be captured for this use [-Werror,-Wunused-lambda-capture]" - see https://lab.llvm.org/buildbot/#/builders/51/builds/570. Fix both cases by using `0xffff` value directly instead of giving a name to it. Original PR description below. Depends on #94240. Define the following pseudos for lowering ptrauth constants in code: - non-`extern_weak`: - no GOT load needed: `MOVaddrPAC` - similar to `MOVaddr`, with added PAC; - GOT load needed: `LOADgotPAC` - similar to `LOADgot`, with added PAC; - `extern_weak`: `LOADauthptrstatic` - similar to `LOADgot`, but use a special stub slot named `sym$auth_ptr$key$disc` filled by dynamic linker during relocation resolving instead of a GOT slot. --------- Co-authored-by: Ahmed Bougacha <ahmed@bougacha.org>
67 lines
2.4 KiB
C++
67 lines
2.4 KiB
C++
//===- llvm/CodeGen/MachineModuleInfoImpls.cpp ----------------------------===//
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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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//
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// This file implements object-file format specific implementations of
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// MachineModuleInfoImpl.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/CodeGen/MachineModuleInfoImpls.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/MC/MCSymbol.h"
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using namespace llvm;
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//===----------------------------------------------------------------------===//
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// MachineModuleInfoMachO
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//===----------------------------------------------------------------------===//
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// Out of line virtual method.
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void MachineModuleInfoMachO::anchor() {}
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void MachineModuleInfoELF::anchor() {}
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void MachineModuleInfoCOFF::anchor() {}
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void MachineModuleInfoWasm::anchor() {}
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using PairTy = std::pair<MCSymbol *, MachineModuleInfoImpl::StubValueTy>;
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static int SortSymbolPair(const PairTy *LHS, const PairTy *RHS) {
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return LHS->first->getName().compare(RHS->first->getName());
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}
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MachineModuleInfoImpl::SymbolListTy MachineModuleInfoImpl::getSortedStubs(
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DenseMap<MCSymbol *, MachineModuleInfoImpl::StubValueTy> &Map) {
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MachineModuleInfoImpl::SymbolListTy List(Map.begin(), Map.end());
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array_pod_sort(List.begin(), List.end(), SortSymbolPair);
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Map.clear();
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return List;
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}
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template <typename MachineModuleInfoTarget>
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static typename MachineModuleInfoTarget::AuthStubListTy getAuthGVStubListHelper(
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DenseMap<MCSymbol *, typename MachineModuleInfoTarget::AuthStubInfo>
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&AuthPtrStubs) {
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typename MachineModuleInfoTarget::AuthStubListTy List(AuthPtrStubs.begin(),
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AuthPtrStubs.end());
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if (!List.empty())
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llvm::sort(List.begin(), List.end(),
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[](const typename MachineModuleInfoTarget::AuthStubPairTy &LHS,
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const typename MachineModuleInfoTarget::AuthStubPairTy &RHS) {
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return LHS.first->getName() < RHS.first->getName();
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});
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AuthPtrStubs.clear();
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return List;
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}
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MachineModuleInfoELF::AuthStubListTy MachineModuleInfoELF::getAuthGVStubList() {
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return getAuthGVStubListHelper<MachineModuleInfoELF>(AuthPtrStubs);
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}
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