| //===----- JITLink_EHFrameSupport.h - JITLink eh-frame utils ----*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // EHFrame registration support for JITLink. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIB_EXECUTIONENGINE_JITLINK_JITLINK_EHFRAMESUPPORTIMPL_H |
| #define LLVM_LIB_EXECUTIONENGINE_JITLINK_JITLINK_EHFRAMESUPPORTIMPL_H |
| |
| #include "llvm/ExecutionEngine/JITLink/JITLink_EHFrameSupport.h" |
| |
| #include "llvm/ExecutionEngine/JITLink/JITLink.h" |
| #include "llvm/Support/BinaryStreamReader.h" |
| |
| namespace llvm { |
| namespace jitlink { |
| |
| /// A generic parser for eh-frame sections. |
| /// |
| /// Adds atoms representing CIE and FDE entries, using the given FDE-to-CIE and |
| /// FDEToTarget relocation kinds. |
| class EHFrameParser { |
| public: |
| EHFrameParser(AtomGraph &G, Section &EHFrameSection, StringRef EHFrameContent, |
| JITTargetAddress EHFrameAddress, Edge::Kind FDEToCIERelocKind, |
| Edge::Kind FDEToTargetRelocKind); |
| Error atomize(); |
| |
| private: |
| struct AugmentationInfo { |
| bool AugmentationDataPresent = false; |
| bool EHDataFieldPresent = false; |
| uint8_t Fields[4] = {0x0, 0x0, 0x0, 0x0}; |
| }; |
| |
| Expected<AugmentationInfo> parseAugmentationString(); |
| Expected<JITTargetAddress> readAbsolutePointer(); |
| Error processCIE(); |
| Error processFDE(JITTargetAddress CIEPointerAddress, uint32_t CIEPointer); |
| |
| AtomGraph &G; |
| Section &EHFrameSection; |
| StringRef EHFrameContent; |
| JITTargetAddress EHFrameAddress; |
| BinaryStreamReader EHFrameReader; |
| DefinedAtom *CurRecordAtom = nullptr; |
| DefinedAtom *MostRecentCIE = nullptr; |
| bool LSDAFieldPresent = false; |
| Edge::Kind FDEToCIERelocKind; |
| Edge::Kind FDEToTargetRelocKind; |
| }; |
| |
| Error addEHFrame(AtomGraph &G, Section &EHFrameSection, |
| StringRef EHFrameContent, JITTargetAddress EHFrameAddress, |
| Edge::Kind FDEToCIERelocKind, Edge::Kind FDEToTargetRelocKind); |
| |
| } // end namespace jitlink |
| } // end namespace llvm |
| |
| #endif // LLVM_LIB_EXECUTIONENGINE_JITLINK_JITLINK_EHFRAMESUPPORTIMPL_H |