736 lines
26 KiB
C++
736 lines
26 KiB
C++
//===-- ARMWinEHPrinter.cpp - Windows on ARM EH Data Printer ----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// Windows on ARM uses a series of serialised data structures (RuntimeFunction)
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// to create a table of information for unwinding. In order to conserve space,
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// there are two different ways that this data is represented.
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//
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// For functions with canonical forms for the prologue and epilogue, the data
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// can be stored in a "packed" form. In this case, the data is packed into the
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// RuntimeFunction's remaining 30-bits and can fully describe the entire frame.
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//
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// +---------------------------------------+
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// | Function Entry Address |
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// +---------------------------------------+
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// | Packed Form Data |
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// +---------------------------------------+
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//
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// This layout is parsed by Decoder::dumpPackedEntry. No unwind bytecode is
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// associated with such a frame as they can be derived from the provided data.
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// The decoder does not synthesize this data as it is unnecessary for the
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// purposes of validation, with the synthesis being required only by a proper
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// unwinder.
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//
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// For functions that are large or do not match canonical forms, the data is
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// split up into two portions, with the actual data residing in the "exception
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// data" table (.xdata) with a reference to the entry from the "procedure data"
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// (.pdata) entry.
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//
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// The exception data contains information about the frame setup, all of the
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// epilouge scopes (for functions for which there are multiple exit points) and
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// the associated exception handler. Additionally, the entry contains byte-code
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// describing how to unwind the function (c.f. Decoder::decodeOpcodes).
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//
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// +---------------------------------------+
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// | Function Entry Address |
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// +---------------------------------------+
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// | Exception Data Entry Address |
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// +---------------------------------------+
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//
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// This layout is parsed by Decoder::dumpUnpackedEntry. Such an entry must
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// first resolve the exception data entry address. This structure
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// (ExceptionDataRecord) has a variable sized header
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// (c.f. ARM::WinEH::HeaderWords) and encodes most of the same information as
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// the packed form. However, because this information is insufficient to
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// synthesize the unwinding, there are associated unwinding bytecode which make
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// up the bulk of the Decoder.
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//
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// The decoder itself is table-driven, using the first byte to determine the
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// opcode and dispatching to the associated printing routine. The bytecode
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// itself is a variable length instruction encoding that can fully describe the
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// state of the stack and the necessary operations for unwinding to the
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// beginning of the frame.
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//
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// The byte-code maintains a 1-1 instruction mapping, indicating both the width
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// of the instruction (Thumb2 instructions are variable length, 16 or 32 bits
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// wide) allowing the program to unwind from any point in the prologue, body, or
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// epilogue of the function.
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#include "ARMWinEHPrinter.h"
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#include "Error.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/Support/ARMWinEH.h"
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#include "llvm/Support/Format.h"
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using namespace llvm;
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using namespace llvm::object;
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using namespace llvm::support;
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namespace llvm {
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raw_ostream &operator<<(raw_ostream &OS, const ARM::WinEH::ReturnType &RT) {
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switch (RT) {
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case ARM::WinEH::ReturnType::RT_POP:
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OS << "pop {pc}";
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break;
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case ARM::WinEH::ReturnType::RT_B:
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OS << "b target";
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break;
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case ARM::WinEH::ReturnType::RT_BW:
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OS << "b.w target";
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break;
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case ARM::WinEH::ReturnType::RT_NoEpilogue:
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OS << "(no epilogue)";
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break;
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}
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return OS;
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}
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}
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static std::string formatSymbol(StringRef Name, uint64_t Address,
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uint64_t Offset = 0) {
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std::string Buffer;
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raw_string_ostream OS(Buffer);
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if (!Name.empty())
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OS << Name << " ";
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if (Offset)
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OS << format("+0x%X (0x%" PRIX64 ")", Offset, Address);
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else if (!Name.empty())
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OS << format("(0x%" PRIX64 ")", Address);
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else
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OS << format("0x%" PRIX64, Address);
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return OS.str();
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}
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namespace llvm {
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namespace ARM {
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namespace WinEH {
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const size_t Decoder::PDataEntrySize = sizeof(RuntimeFunction);
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// TODO name the uops more appropriately
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const Decoder::RingEntry Decoder::Ring[] = {
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{ 0x80, 0x00, &Decoder::opcode_0xxxxxxx }, // UOP_STACK_FREE (16-bit)
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{ 0xc0, 0x80, &Decoder::opcode_10Lxxxxx }, // UOP_POP (32-bit)
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{ 0xf0, 0xc0, &Decoder::opcode_1100xxxx }, // UOP_STACK_SAVE (16-bit)
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{ 0xf8, 0xd0, &Decoder::opcode_11010Lxx }, // UOP_POP (16-bit)
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{ 0xf8, 0xd8, &Decoder::opcode_11011Lxx }, // UOP_POP (32-bit)
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{ 0xf8, 0xe0, &Decoder::opcode_11100xxx }, // UOP_VPOP (32-bit)
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{ 0xfc, 0xe8, &Decoder::opcode_111010xx }, // UOP_STACK_FREE (32-bit)
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{ 0xfe, 0xec, &Decoder::opcode_1110110L }, // UOP_POP (16-bit)
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{ 0xff, 0xee, &Decoder::opcode_11101110 }, // UOP_MICROSOFT_SPECIFIC (16-bit)
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// UOP_PUSH_MACHINE_FRAME
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// UOP_PUSH_CONTEXT
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// UOP_PUSH_TRAP_FRAME
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// UOP_REDZONE_RESTORE_LR
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{ 0xff, 0xef, &Decoder::opcode_11101111 }, // UOP_LDRPC_POSTINC (32-bit)
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{ 0xff, 0xf5, &Decoder::opcode_11110101 }, // UOP_VPOP (32-bit)
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{ 0xff, 0xf6, &Decoder::opcode_11110110 }, // UOP_VPOP (32-bit)
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{ 0xff, 0xf7, &Decoder::opcode_11110111 }, // UOP_STACK_RESTORE (16-bit)
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{ 0xff, 0xf8, &Decoder::opcode_11111000 }, // UOP_STACK_RESTORE (16-bit)
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{ 0xff, 0xf9, &Decoder::opcode_11111001 }, // UOP_STACK_RESTORE (32-bit)
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{ 0xff, 0xfa, &Decoder::opcode_11111010 }, // UOP_STACK_RESTORE (32-bit)
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{ 0xff, 0xfb, &Decoder::opcode_11111011 }, // UOP_NOP (16-bit)
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{ 0xff, 0xfc, &Decoder::opcode_11111100 }, // UOP_NOP (32-bit)
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{ 0xff, 0xfd, &Decoder::opcode_11111101 }, // UOP_NOP (16-bit) / END
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{ 0xff, 0xfe, &Decoder::opcode_11111110 }, // UOP_NOP (32-bit) / END
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{ 0xff, 0xff, &Decoder::opcode_11111111 }, // UOP_END
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};
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void Decoder::printRegisters(const std::pair<uint16_t, uint32_t> &RegisterMask) {
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static const char * const GPRRegisterNames[16] = {
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"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10",
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"r11", "ip", "sp", "lr", "pc",
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};
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const uint16_t GPRMask = std::get<0>(RegisterMask);
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const uint16_t VFPMask = std::get<1>(RegisterMask);
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OS << '{';
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bool Comma = false;
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for (unsigned RI = 0, RE = 11; RI < RE; ++RI) {
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if (GPRMask & (1 << RI)) {
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if (Comma)
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OS << ", ";
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OS << GPRRegisterNames[RI];
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Comma = true;
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}
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}
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for (unsigned RI = 0, RE = 32; RI < RE; ++RI) {
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if (VFPMask & (1 << RI)) {
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if (Comma)
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OS << ", ";
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OS << "d" << unsigned(RI);
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Comma = true;
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}
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}
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for (unsigned RI = 11, RE = 16; RI < RE; ++RI) {
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if (GPRMask & (1 << RI)) {
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if (Comma)
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OS << ", ";
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OS << GPRRegisterNames[RI];
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Comma = true;
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}
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}
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OS << '}';
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}
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ErrorOr<object::SectionRef>
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Decoder::getSectionContaining(const COFFObjectFile &COFF, uint64_t VA) {
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for (const auto &Section : COFF.sections()) {
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uint64_t Address = Section.getAddress();
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uint64_t Size = Section.getSize();
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if (VA >= Address && (VA - Address) <= Size)
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return Section;
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}
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return readobj_error::unknown_symbol;
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}
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ErrorOr<object::SymbolRef> Decoder::getSymbol(const COFFObjectFile &COFF,
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uint64_t VA, bool FunctionOnly) {
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for (const auto &Symbol : COFF.symbols()) {
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if (FunctionOnly) {
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SymbolRef::Type Type;
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if (std::error_code EC = Symbol.getType(Type))
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return EC;
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if (Type != SymbolRef::ST_Function)
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continue;
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}
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uint64_t Address;
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if (std::error_code EC = Symbol.getAddress(Address))
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return EC;
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if (Address == VA)
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return Symbol;
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}
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return readobj_error::unknown_symbol;
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}
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ErrorOr<SymbolRef> Decoder::getRelocatedSymbol(const COFFObjectFile &,
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const SectionRef &Section,
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uint64_t Offset) {
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for (const auto &Relocation : Section.relocations()) {
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uint64_t RelocationOffset;
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if (auto Error = Relocation.getOffset(RelocationOffset))
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return Error;
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if (RelocationOffset == Offset)
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return *Relocation.getSymbol();
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}
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return readobj_error::unknown_symbol;
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}
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bool Decoder::opcode_0xxxxxxx(const uint8_t *OC, unsigned &Offset,
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unsigned Length, bool Prologue) {
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uint8_t Imm = OC[Offset] & 0x7f;
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SW.startLine() << format("0x%02x ; %s sp, #(%u * 4)\n",
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OC[Offset],
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static_cast<const char *>(Prologue ? "sub" : "add"),
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Imm);
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++Offset;
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return false;
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}
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bool Decoder::opcode_10Lxxxxx(const uint8_t *OC, unsigned &Offset,
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unsigned Length, bool Prologue) {
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unsigned Link = (OC[Offset] & 0x20) >> 5;
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uint16_t RegisterMask = (Link << (Prologue ? 14 : 15))
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| ((OC[Offset + 0] & 0x1f) << 8)
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| ((OC[Offset + 1] & 0xff) << 0);
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assert((~RegisterMask & (1 << 13)) && "sp must not be set");
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assert((~RegisterMask & (1 << (Prologue ? 15 : 14))) && "pc must not be set");
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SW.startLine() << format("0x%02x 0x%02x ; %s.w ",
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OC[Offset + 0], OC[Offset + 1],
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Prologue ? "push" : "pop");
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printRegisters(std::make_pair(RegisterMask, 0));
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OS << '\n';
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++Offset, ++Offset;
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return false;
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}
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bool Decoder::opcode_1100xxxx(const uint8_t *OC, unsigned &Offset,
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unsigned Length, bool Prologue) {
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if (Prologue)
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SW.startLine() << format("0x%02x ; mov r%u, sp\n",
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OC[Offset], OC[Offset] & 0xf);
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else
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SW.startLine() << format("0x%02x ; mov sp, r%u\n",
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OC[Offset], OC[Offset] & 0xf);
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++Offset;
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return false;
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}
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bool Decoder::opcode_11010Lxx(const uint8_t *OC, unsigned &Offset,
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unsigned Length, bool Prologue) {
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unsigned Link = (OC[Offset] & 0x4) >> 3;
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unsigned Count = (OC[Offset] & 0x3);
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uint16_t GPRMask = (Link << (Prologue ? 14 : 15))
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| (((1 << (Count + 1)) - 1) << 4);
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SW.startLine() << format("0x%02x ; %s ", OC[Offset],
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Prologue ? "push" : "pop");
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printRegisters(std::make_pair(GPRMask, 0));
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OS << '\n';
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++Offset;
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return false;
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}
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bool Decoder::opcode_11011Lxx(const uint8_t *OC, unsigned &Offset,
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unsigned Length, bool Prologue) {
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unsigned Link = (OC[Offset] & 0x4) >> 2;
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unsigned Count = (OC[Offset] & 0x3) + 4;
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uint16_t GPRMask = (Link << (Prologue ? 14 : 15))
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| (((1 << (Count + 1)) - 1) << 4);
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SW.startLine() << format("0x%02x ; %s.w ", OC[Offset],
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Prologue ? "push" : "pop");
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printRegisters(std::make_pair(GPRMask, 0));
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OS << '\n';
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++Offset;
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return false;
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}
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bool Decoder::opcode_11100xxx(const uint8_t *OC, unsigned &Offset,
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unsigned Length, bool Prologue) {
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unsigned High = (OC[Offset] & 0x7);
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uint32_t VFPMask = (((1 << (High + 1)) - 1) << 8);
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SW.startLine() << format("0x%02x ; %s ", OC[Offset],
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Prologue ? "vpush" : "vpop");
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printRegisters(std::make_pair(0, VFPMask));
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OS << '\n';
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++Offset;
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return false;
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}
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bool Decoder::opcode_111010xx(const uint8_t *OC, unsigned &Offset,
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unsigned Length, bool Prologue) {
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uint16_t Imm = ((OC[Offset + 0] & 0x03) << 8) | ((OC[Offset + 1] & 0xff) << 0);
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SW.startLine() << format("0x%02x 0x%02x ; %s.w sp, #(%u * 4)\n",
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OC[Offset + 0], OC[Offset + 1],
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static_cast<const char *>(Prologue ? "sub" : "add"),
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Imm);
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++Offset, ++Offset;
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return false;
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}
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bool Decoder::opcode_1110110L(const uint8_t *OC, unsigned &Offset,
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unsigned Length, bool Prologue) {
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uint8_t GPRMask = ((OC[Offset + 0] & 0x01) << (Prologue ? 14 : 15))
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| ((OC[Offset + 1] & 0xff) << 0);
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SW.startLine() << format("0x%02x 0x%02x ; %s ", OC[Offset + 0],
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OC[Offset + 1], Prologue ? "push" : "pop");
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printRegisters(std::make_pair(GPRMask, 0));
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OS << '\n';
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++Offset, ++Offset;
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return false;
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}
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bool Decoder::opcode_11101110(const uint8_t *OC, unsigned &Offset,
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unsigned Length, bool Prologue) {
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assert(!Prologue && "may not be used in prologue");
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if (OC[Offset + 1] & 0xf0)
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SW.startLine() << format("0x%02x 0x%02x ; reserved\n",
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OC[Offset + 0], OC[Offset + 1]);
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else
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SW.startLine()
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<< format("0x%02x 0x%02x ; microsoft-specific (type: %u)\n",
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OC[Offset + 0], OC[Offset + 1], OC[Offset + 1] & 0x0f);
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++Offset, ++Offset;
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return false;
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}
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bool Decoder::opcode_11101111(const uint8_t *OC, unsigned &Offset,
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unsigned Length, bool Prologue) {
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assert(!Prologue && "may not be used in prologue");
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if (OC[Offset + 1] & 0xf0)
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SW.startLine() << format("0x%02x 0x%02x ; reserved\n",
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OC[Offset + 0], OC[Offset + 1]);
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else
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SW.startLine()
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<< format("0x%02x 0x%02x ; ldr.w lr, [sp], #%u\n",
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OC[Offset + 0], OC[Offset + 1], OC[Offset + 1] << 2);
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++Offset, ++Offset;
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return false;
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}
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bool Decoder::opcode_11110101(const uint8_t *OC, unsigned &Offset,
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unsigned Length, bool Prologue) {
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unsigned Start = (OC[Offset + 1] & 0xf0) >> 4;
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unsigned End = (OC[Offset + 1] & 0x0f) >> 0;
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uint32_t VFPMask = ((1 << (End - Start)) - 1) << Start;
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SW.startLine() << format("0x%02x 0x%02x ; %s ", OC[Offset + 0],
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OC[Offset + 1], Prologue ? "vpush" : "vpop");
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printRegisters(std::make_pair(0, VFPMask));
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OS << '\n';
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++Offset, ++Offset;
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return false;
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}
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bool Decoder::opcode_11110110(const uint8_t *OC, unsigned &Offset,
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unsigned Length, bool Prologue) {
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unsigned Start = (OC[Offset + 1] & 0xf0) >> 4;
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unsigned End = (OC[Offset + 1] & 0x0f) >> 0;
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uint32_t VFPMask = ((1 << (End - Start)) - 1) << 16;
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SW.startLine() << format("0x%02x 0x%02x ; %s ", OC[Offset + 0],
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OC[Offset + 1], Prologue ? "vpush" : "vpop");
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printRegisters(std::make_pair(0, VFPMask));
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OS << '\n';
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++Offset, ++Offset;
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return false;
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}
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bool Decoder::opcode_11110111(const uint8_t *OC, unsigned &Offset,
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unsigned Length, bool Prologue) {
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uint32_t Imm = (OC[Offset + 1] << 8) | (OC[Offset + 2] << 0);
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SW.startLine() << format("0x%02x 0x%02x 0x%02x ; %s sp, sp, #(%u * 4)\n",
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OC[Offset + 0], OC[Offset + 1], OC[Offset + 2],
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static_cast<const char *>(Prologue ? "sub" : "add"),
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Imm);
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++Offset, ++Offset, ++Offset;
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return false;
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}
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bool Decoder::opcode_11111000(const uint8_t *OC, unsigned &Offset,
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unsigned Length, bool Prologue) {
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uint32_t Imm = (OC[Offset + 1] << 16)
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| (OC[Offset + 2] << 8)
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| (OC[Offset + 3] << 0);
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SW.startLine()
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<< format("0x%02x 0x%02x 0x%02x 0x%02x ; %s sp, sp, #(%u * 4)\n",
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OC[Offset + 0], OC[Offset + 1], OC[Offset + 2], OC[Offset + 3],
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static_cast<const char *>(Prologue ? "sub" : "add"), Imm);
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++Offset, ++Offset, ++Offset, ++Offset;
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return false;
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}
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bool Decoder::opcode_11111001(const uint8_t *OC, unsigned &Offset,
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unsigned Length, bool Prologue) {
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uint32_t Imm = (OC[Offset + 1] << 8) | (OC[Offset + 2] << 0);
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SW.startLine()
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<< format("0x%02x 0x%02x 0x%02x ; %s.w sp, sp, #(%u * 4)\n",
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OC[Offset + 0], OC[Offset + 1], OC[Offset + 2],
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static_cast<const char *>(Prologue ? "sub" : "add"), Imm);
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++Offset, ++Offset, ++Offset;
|
|
return false;
|
|
}
|
|
|
|
bool Decoder::opcode_11111010(const uint8_t *OC, unsigned &Offset,
|
|
unsigned Length, bool Prologue) {
|
|
uint32_t Imm = (OC[Offset + 1] << 16)
|
|
| (OC[Offset + 2] << 8)
|
|
| (OC[Offset + 3] << 0);
|
|
|
|
SW.startLine()
|
|
<< format("0x%02x 0x%02x 0x%02x 0x%02x ; %s.w sp, sp, #(%u * 4)\n",
|
|
OC[Offset + 0], OC[Offset + 1], OC[Offset + 2], OC[Offset + 3],
|
|
static_cast<const char *>(Prologue ? "sub" : "add"), Imm);
|
|
|
|
++Offset, ++Offset, ++Offset, ++Offset;
|
|
return false;
|
|
}
|
|
|
|
bool Decoder::opcode_11111011(const uint8_t *OC, unsigned &Offset,
|
|
unsigned Length, bool Prologue) {
|
|
SW.startLine() << format("0x%02x ; nop\n", OC[Offset]);
|
|
++Offset;
|
|
return false;
|
|
}
|
|
|
|
bool Decoder::opcode_11111100(const uint8_t *OC, unsigned &Offset,
|
|
unsigned Length, bool Prologue) {
|
|
SW.startLine() << format("0x%02x ; nop.w\n", OC[Offset]);
|
|
++Offset;
|
|
return false;
|
|
}
|
|
|
|
bool Decoder::opcode_11111101(const uint8_t *OC, unsigned &Offset,
|
|
unsigned Length, bool Prologue) {
|
|
SW.startLine() << format("0x%02x ; b\n", OC[Offset]);
|
|
++Offset;
|
|
return true;
|
|
}
|
|
|
|
bool Decoder::opcode_11111110(const uint8_t *OC, unsigned &Offset,
|
|
unsigned Length, bool Prologue) {
|
|
SW.startLine() << format("0x%02x ; b.w\n", OC[Offset]);
|
|
++Offset;
|
|
return true;
|
|
}
|
|
|
|
bool Decoder::opcode_11111111(const uint8_t *OC, unsigned &Offset,
|
|
unsigned Length, bool Prologue) {
|
|
++Offset;
|
|
return true;
|
|
}
|
|
|
|
void Decoder::decodeOpcodes(ArrayRef<uint8_t> Opcodes, unsigned Offset,
|
|
bool Prologue) {
|
|
assert((!Prologue || Offset == 0) && "prologue should always use offset 0");
|
|
|
|
bool Terminated = false;
|
|
for (unsigned OI = Offset, OE = Opcodes.size(); !Terminated && OI < OE; ) {
|
|
for (unsigned DI = 0;; ++DI) {
|
|
if ((Opcodes[OI] & Ring[DI].Mask) == Ring[DI].Value) {
|
|
Terminated = (this->*Ring[DI].Routine)(Opcodes.data(), OI, 0, Prologue);
|
|
break;
|
|
}
|
|
assert(DI < array_lengthof(Ring) && "unhandled opcode");
|
|
}
|
|
}
|
|
}
|
|
|
|
bool Decoder::dumpXDataRecord(const COFFObjectFile &COFF,
|
|
const SectionRef &Section,
|
|
uint64_t FunctionAddress, uint64_t VA) {
|
|
ArrayRef<uint8_t> Contents;
|
|
if (COFF.getSectionContents(COFF.getCOFFSection(Section), Contents))
|
|
return false;
|
|
|
|
uint64_t SectionVA = Section.getAddress();
|
|
uint64_t Offset = VA - SectionVA;
|
|
const ulittle32_t *Data =
|
|
reinterpret_cast<const ulittle32_t *>(Contents.data() + Offset);
|
|
const ExceptionDataRecord XData(Data);
|
|
|
|
DictScope XRS(SW, "ExceptionData");
|
|
SW.printNumber("FunctionLength", XData.FunctionLength() << 1);
|
|
SW.printNumber("Version", XData.Vers());
|
|
SW.printBoolean("ExceptionData", XData.X());
|
|
SW.printBoolean("EpiloguePacked", XData.E());
|
|
SW.printBoolean("Fragment", XData.F());
|
|
SW.printNumber(XData.E() ? "EpilogueOffset" : "EpilogueScopes",
|
|
XData.EpilogueCount());
|
|
SW.printNumber("ByteCodeLength",
|
|
static_cast<uint64_t>(XData.CodeWords() * sizeof(uint32_t)));
|
|
|
|
if (XData.E()) {
|
|
ArrayRef<uint8_t> UC = XData.UnwindByteCode();
|
|
if (!XData.F()) {
|
|
ListScope PS(SW, "Prologue");
|
|
decodeOpcodes(UC, 0, /*Prologue=*/true);
|
|
}
|
|
if (XData.EpilogueCount()) {
|
|
ListScope ES(SW, "Epilogue");
|
|
decodeOpcodes(UC, XData.EpilogueCount(), /*Prologue=*/false);
|
|
}
|
|
} else {
|
|
ArrayRef<ulittle32_t> EpilogueScopes = XData.EpilogueScopes();
|
|
ListScope ESS(SW, "EpilogueScopes");
|
|
for (const EpilogueScope ES : EpilogueScopes) {
|
|
DictScope ESES(SW, "EpilogueScope");
|
|
SW.printNumber("StartOffset", ES.EpilogueStartOffset());
|
|
SW.printNumber("Condition", ES.Condition());
|
|
SW.printNumber("EpilogueStartIndex", ES.EpilogueStartIndex());
|
|
|
|
ListScope Opcodes(SW, "Opcodes");
|
|
decodeOpcodes(XData.UnwindByteCode(), ES.EpilogueStartIndex(),
|
|
/*Prologue=*/false);
|
|
}
|
|
}
|
|
|
|
if (XData.X()) {
|
|
const uint32_t Address = XData.ExceptionHandlerRVA();
|
|
const uint32_t Parameter = XData.ExceptionHandlerParameter();
|
|
const size_t HandlerOffset = HeaderWords(XData)
|
|
+ (XData.E() ? 0 : XData.EpilogueCount())
|
|
+ XData.CodeWords();
|
|
|
|
ErrorOr<SymbolRef> Symbol =
|
|
getRelocatedSymbol(COFF, Section, HandlerOffset * sizeof(uint32_t));
|
|
if (!Symbol)
|
|
Symbol = getSymbol(COFF, Address, /*FunctionOnly=*/true);
|
|
|
|
StringRef Name;
|
|
if (Symbol)
|
|
Symbol->getName(Name);
|
|
|
|
ListScope EHS(SW, "ExceptionHandler");
|
|
SW.printString("Routine", formatSymbol(Name, Address));
|
|
SW.printHex("Parameter", Parameter);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool Decoder::dumpUnpackedEntry(const COFFObjectFile &COFF,
|
|
const SectionRef Section, uint64_t Offset,
|
|
unsigned Index, const RuntimeFunction &RF) {
|
|
assert(RF.Flag() == RuntimeFunctionFlag::RFF_Unpacked &&
|
|
"packed entry cannot be treated as an unpacked entry");
|
|
|
|
ErrorOr<SymbolRef> Function = getRelocatedSymbol(COFF, Section, Offset);
|
|
if (!Function)
|
|
Function = getSymbol(COFF, RF.BeginAddress, /*FunctionOnly=*/true);
|
|
|
|
ErrorOr<SymbolRef> XDataRecord = getRelocatedSymbol(COFF, Section, Offset + 4);
|
|
if (!XDataRecord)
|
|
XDataRecord = getSymbol(COFF, RF.ExceptionInformationRVA());
|
|
|
|
if (!RF.BeginAddress && !Function)
|
|
return false;
|
|
if (!RF.UnwindData && !XDataRecord)
|
|
return false;
|
|
|
|
StringRef FunctionName;
|
|
uint64_t FunctionAddress;
|
|
if (Function) {
|
|
Function->getName(FunctionName);
|
|
Function->getAddress(FunctionAddress);
|
|
} else {
|
|
const pe32_header *PEHeader;
|
|
if (COFF.getPE32Header(PEHeader))
|
|
return false;
|
|
FunctionAddress = PEHeader->ImageBase + RF.BeginAddress;
|
|
}
|
|
|
|
SW.printString("Function", formatSymbol(FunctionName, FunctionAddress));
|
|
|
|
if (XDataRecord) {
|
|
StringRef Name;
|
|
uint64_t Address;
|
|
|
|
XDataRecord->getName(Name);
|
|
XDataRecord->getAddress(Address);
|
|
|
|
SW.printString("ExceptionRecord", formatSymbol(Name, Address));
|
|
|
|
section_iterator SI = COFF.section_end();
|
|
if (XDataRecord->getSection(SI))
|
|
return false;
|
|
|
|
return dumpXDataRecord(COFF, *SI, FunctionAddress, Address);
|
|
} else {
|
|
const pe32_header *PEHeader;
|
|
if (COFF.getPE32Header(PEHeader))
|
|
return false;
|
|
|
|
uint64_t Address = PEHeader->ImageBase + RF.ExceptionInformationRVA();
|
|
SW.printString("ExceptionRecord", formatSymbol("", Address));
|
|
|
|
ErrorOr<SectionRef> Section =
|
|
getSectionContaining(COFF, RF.ExceptionInformationRVA());
|
|
if (!Section)
|
|
return false;
|
|
|
|
return dumpXDataRecord(COFF, *Section, FunctionAddress,
|
|
RF.ExceptionInformationRVA());
|
|
}
|
|
}
|
|
|
|
bool Decoder::dumpPackedEntry(const object::COFFObjectFile &COFF,
|
|
const SectionRef Section, uint64_t Offset,
|
|
unsigned Index, const RuntimeFunction &RF) {
|
|
assert((RF.Flag() == RuntimeFunctionFlag::RFF_Packed ||
|
|
RF.Flag() == RuntimeFunctionFlag::RFF_PackedFragment) &&
|
|
"unpacked entry cannot be treated as a packed entry");
|
|
|
|
ErrorOr<SymbolRef> Function = getRelocatedSymbol(COFF, Section, Offset);
|
|
if (!Function)
|
|
Function = getSymbol(COFF, RF.BeginAddress, /*FunctionOnly=*/true);
|
|
|
|
StringRef FunctionName;
|
|
uint64_t FunctionAddress;
|
|
if (Function) {
|
|
Function->getName(FunctionName);
|
|
Function->getAddress(FunctionAddress);
|
|
} else {
|
|
const pe32_header *PEHeader;
|
|
if (COFF.getPE32Header(PEHeader))
|
|
return false;
|
|
FunctionAddress = PEHeader->ImageBase + RF.BeginAddress;
|
|
}
|
|
|
|
SW.printString("Function", formatSymbol(FunctionName, FunctionAddress));
|
|
SW.printBoolean("Fragment",
|
|
RF.Flag() == RuntimeFunctionFlag::RFF_PackedFragment);
|
|
SW.printNumber("FunctionLength", RF.FunctionLength());
|
|
SW.startLine() << "ReturnType: " << RF.Ret() << '\n';
|
|
SW.printBoolean("HomedParameters", RF.H());
|
|
SW.startLine() << "SavedRegisters: ";
|
|
printRegisters(SavedRegisterMask(RF));
|
|
OS << '\n';
|
|
SW.printNumber("StackAdjustment", StackAdjustment(RF) << 2);
|
|
|
|
return true;
|
|
}
|
|
|
|
bool Decoder::dumpProcedureDataEntry(const COFFObjectFile &COFF,
|
|
const SectionRef Section, unsigned Index,
|
|
ArrayRef<uint8_t> Contents) {
|
|
uint64_t Offset = PDataEntrySize * Index;
|
|
const ulittle32_t *Data =
|
|
reinterpret_cast<const ulittle32_t *>(Contents.data() + Offset);
|
|
|
|
const RuntimeFunction Entry(Data);
|
|
DictScope RFS(SW, "RuntimeFunction");
|
|
if (Entry.Flag() == RuntimeFunctionFlag::RFF_Unpacked)
|
|
return dumpUnpackedEntry(COFF, Section, Offset, Index, Entry);
|
|
return dumpPackedEntry(COFF, Section, Offset, Index, Entry);
|
|
}
|
|
|
|
void Decoder::dumpProcedureData(const COFFObjectFile &COFF,
|
|
const SectionRef Section) {
|
|
ArrayRef<uint8_t> Contents;
|
|
if (COFF.getSectionContents(COFF.getCOFFSection(Section), Contents))
|
|
return;
|
|
|
|
if (Contents.size() % PDataEntrySize) {
|
|
errs() << ".pdata content is not " << PDataEntrySize << "-byte aligned\n";
|
|
return;
|
|
}
|
|
|
|
for (unsigned EI = 0, EE = Contents.size() / PDataEntrySize; EI < EE; ++EI)
|
|
if (!dumpProcedureDataEntry(COFF, Section, EI, Contents))
|
|
break;
|
|
}
|
|
|
|
std::error_code Decoder::dumpProcedureData(const COFFObjectFile &COFF) {
|
|
for (const auto &Section : COFF.sections()) {
|
|
StringRef SectionName;
|
|
if (std::error_code EC =
|
|
COFF.getSectionName(COFF.getCOFFSection(Section), SectionName))
|
|
return EC;
|
|
|
|
if (SectionName.startswith(".pdata"))
|
|
dumpProcedureData(COFF, Section);
|
|
}
|
|
return std::error_code();
|
|
}
|
|
}
|
|
}
|
|
}
|