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2201164477
Adds support to objdump and readobj for reading the `UOP_Epilog` entries of Windows x64 unwind v2. `UOP_Epilog` has a weird format: The first `UOP_Epilog` in the unwind data is the "header": * The least-significant bit of `OpInfo` is the "At End" flag, which signifies that there is an epilog at the very end of the associated function. * `CodeOffset` is the length each epilog described by the current unwind information (all epilogs have the same length). Any subsequent `UOP_Epilog` represents another epilog for the current function, where `OpInfo` and `CodeOffset` are combined to a 12-bit value which is the offset of the beginning of the epilog from the end of the current function. If the offset is 0, then this entry is actually padding and can be ignored.
64 lines
2.0 KiB
C++
64 lines
2.0 KiB
C++
//===- Win64EHDumper.h - Win64 EH Printing ----------------------*- 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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#ifndef LLVM_TOOLS_LLVM_READOBJ_WIN64EHDUMPER_H
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#define LLVM_TOOLS_LLVM_READOBJ_WIN64EHDUMPER_H
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#include "llvm/Support/ScopedPrinter.h"
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#include "llvm/Support/Win64EH.h"
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namespace llvm {
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namespace object {
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class COFFObjectFile;
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class SymbolRef;
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struct coff_section;
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}
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namespace Win64EH {
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class Dumper {
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ScopedPrinter &SW;
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raw_ostream &OS;
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public:
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typedef std::error_code (*SymbolResolver)(const object::coff_section *,
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uint64_t, object::SymbolRef &,
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void *);
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struct Context {
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const object::COFFObjectFile &COFF;
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SymbolResolver ResolveSymbol;
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void *UserData;
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Context(const object::COFFObjectFile &COFF, SymbolResolver Resolver,
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void *UserData)
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: COFF(COFF), ResolveSymbol(Resolver), UserData(UserData) {}
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};
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private:
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void printRuntimeFunctionEntry(const Context &Ctx,
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const object::coff_section *Section,
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uint64_t SectionOffset,
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const RuntimeFunction &RF);
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void printUnwindCode(const UnwindInfo &UI, ArrayRef<UnwindCode> UC,
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bool &SeenFirstEpilog);
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void printUnwindInfo(const Context &Ctx, const object::coff_section *Section,
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off_t Offset, const UnwindInfo &UI);
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void printRuntimeFunction(const Context &Ctx,
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const object::coff_section *Section,
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uint64_t SectionOffset, const RuntimeFunction &RF);
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public:
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Dumper(ScopedPrinter &SW) : SW(SW), OS(SW.getOStream()) {}
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void printData(const Context &Ctx);
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};
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}
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}
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#endif
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