mirror of
https://github.com/intel/llvm.git
synced 2026-01-22 23:49:22 +08:00
Added a new disassembler plugin, DisassemblerLLVMC,
which uses the Disassembler.h interface to the LLVM disassemblers rather than the EnhancedDisassembly.h interface. Disassembler.h is a better-maintained API and will be stabler in the long term. Currently the output from Disassembler.h does not provide for symbolic disassembly in all the places that the old disassembler did, so I have gated (and disabled) the disassembler. It'll be easy to flip the switch later. In the meantime, to enable the new disassembler, uncomment "#define USE_NEW_DISASSEMBLER" in lldb.cpp. llvm-svn: 150772
This commit is contained in:
Sean Callanan
580
lldb/source/Plugins/Disassembler/llvm/DisassemblerLLVMC.cpp
Normal file
580
lldb/source/Plugins/Disassembler/llvm/DisassemblerLLVMC.cpp
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@@ -0,0 +1,580 @@
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//===-- DisassemblerLLVMC.cpp -----------------------------------*- 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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#include "DisassemblerLLVMC.h"
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#include "llvm-c/Disassembler.h"
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#include "llvm/Support/TargetSelect.h"
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#include "lldb/Core/Address.h"
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#include "lldb/Core/DataExtractor.h"
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#include "lldb/Core/Stream.h"
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#include "lldb/Symbol/SymbolContext.h"
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#include "lldb/Target/ExecutionContext.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/RegisterContext.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Target/StackFrame.h"
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#include <regex.h>
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using namespace lldb;
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using namespace lldb_private;
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class InstructionLLVMC : public lldb_private::Instruction
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{
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public:
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InstructionLLVMC (DisassemblerLLVMC &disasm,
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const lldb_private::Address &address,
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lldb_private::AddressClass addr_class) :
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Instruction(address, addr_class),
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m_disasm(disasm),
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m_is_valid(false),
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m_no_comments(true),
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m_comment_stream()
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{
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}
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virtual
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~InstructionLLVMC ()
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{
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}
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static void
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PadToWidth (lldb_private::StreamString &ss,
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int new_width)
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{
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int old_width = ss.GetSize();
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if (old_width < new_width)
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{
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ss.Printf("%*s", new_width - old_width, "");
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}
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}
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virtual void
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Dump (lldb_private::Stream *s,
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uint32_t max_opcode_byte_size,
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bool show_address,
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bool show_bytes,
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const lldb_private::ExecutionContext* exe_ctx,
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bool raw)
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{
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const size_t opcode_column_width = 7;
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const size_t operand_column_width = 25;
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StreamString ss;
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ExecutionContextScope *exe_scope = NULL;
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if ((!raw) && exe_ctx)
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{
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exe_scope = exe_ctx->GetBestExecutionContextScope();
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DataExtractor extractor(m_raw_bytes.data(),
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m_raw_bytes.size(),
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m_disasm.GetArchitecture().GetByteOrder(),
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m_disasm.GetArchitecture().GetAddressByteSize());
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Parse <true> (m_address,
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m_address_class,
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extractor,
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0,
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exe_scope);
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}
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if (show_address)
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{
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m_address.Dump(&ss,
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exe_scope,
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Address::DumpStyleLoadAddress,
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Address::DumpStyleModuleWithFileAddress,
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0);
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ss.PutCString(": ");
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}
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if (show_bytes)
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{
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if (m_opcode.GetType() == Opcode::eTypeBytes)
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{
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// x86_64 and i386 are the only ones that use bytes right now so
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// pad out the byte dump to be able to always show 15 bytes (3 chars each)
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// plus a space
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if (max_opcode_byte_size > 0)
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m_opcode.Dump (&ss, max_opcode_byte_size * 3 + 1);
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else
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m_opcode.Dump (&ss, 15 * 3 + 1);
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}
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else
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{
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// Else, we have ARM which can show up to a uint32_t 0x00000000 (10 spaces)
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// plus two for padding...
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if (max_opcode_byte_size > 0)
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m_opcode.Dump (&ss, max_opcode_byte_size * 3 + 1);
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else
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m_opcode.Dump (&ss, 12);
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}
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}
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int size_before_inst = ss.GetSize();
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ss.PutCString(m_opcode_name.c_str());
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PadToWidth(ss, size_before_inst + opcode_column_width);
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ss.PutCString(m_mnemocics.c_str());
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PadToWidth(ss, size_before_inst + opcode_column_width + operand_column_width);
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if (!m_comment.empty())
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{
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ss.PutCString(" ; ");
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ss.PutCString(m_comment.c_str());
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}
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ss.Flush();
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s->PutCString(ss.GetData());
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}
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virtual bool
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DoesBranch () const
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{
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return false;
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}
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virtual size_t
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Decode (const lldb_private::Disassembler &disassembler,
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const lldb_private::DataExtractor &data,
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uint32_t data_offset)
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{
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Parse <false> (m_address,
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m_address_class,
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data,
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data_offset,
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NULL);
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return m_opcode.GetByteSize();
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}
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void
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AddReferencedAddress (std::string &description)
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{
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if (m_no_comments)
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m_comment_stream.PutCString(", ");
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else
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m_no_comments = true;
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m_comment_stream.PutCString(description.c_str());
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}
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virtual void
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CalculateMnemonicOperandsAndComment (lldb_private::ExecutionContextScope *exe_scope)
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{
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DataExtractor extractor(m_raw_bytes.data(),
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m_raw_bytes.size(),
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m_disasm.GetArchitecture().GetByteOrder(),
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m_disasm.GetArchitecture().GetAddressByteSize());
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Parse <true> (m_address,
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m_address_class,
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extractor,
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0,
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exe_scope);
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}
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bool
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IsValid ()
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{
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return m_is_valid;
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}
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size_t
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GetByteSize ()
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{
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return m_opcode.GetByteSize();
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}
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protected:
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void PopulateOpcode (const DataExtractor &extractor,
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uint32_t offset,
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size_t inst_size)
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{
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llvm::Triple::ArchType arch = m_disasm.GetArchitecture().GetMachine();
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switch (arch)
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{
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default:
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case llvm::Triple::x86:
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case llvm::Triple::x86_64:
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m_opcode.SetOpcodeBytes(extractor.PeekData(offset, inst_size), inst_size);
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break;
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case llvm::Triple::arm:
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case llvm::Triple::thumb:
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switch (inst_size)
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{
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case 2:
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{
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m_opcode.SetOpcode16 (extractor.GetU16 (&offset));
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break;
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}
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break;
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case 4:
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{
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if (arch == llvm::Triple::arm &&
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m_address_class == eAddressClassCodeAlternateISA)
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{
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// If it is a 32-bit THUMB instruction, we need to swap the upper & lower halves.
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uint32_t orig_bytes = extractor.GetU32 (&offset);
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uint16_t upper_bits = (orig_bytes >> 16) & ((1u << 16) - 1);
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uint16_t lower_bits = orig_bytes & ((1u << 16) - 1);
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uint32_t swapped = (lower_bits << 16) | upper_bits;
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m_opcode.SetOpcode32 (swapped);
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}
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else
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{
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m_opcode.SetOpcode32 (extractor.GetU32 (&offset));
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}
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}
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break;
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default:
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assert (!"Invalid ARM opcode size");
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break;
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}
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break;
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}
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}
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template <bool Reparse> bool Parse (const lldb_private::Address &address,
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lldb_private::AddressClass addr_class,
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const DataExtractor &extractor,
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uint32_t data_offset,
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lldb_private::ExecutionContextScope *exe_scope)
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{
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std::vector<char> out_string(256);
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const uint8_t *data_start = extractor.GetDataStart();
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m_disasm.Lock(this, exe_scope);
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::LLVMDisasmContextRef disasm_context;
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if (addr_class == eAddressClassCodeAlternateISA)
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disasm_context = m_disasm.m_alternate_disasm_context;
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else
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disasm_context = m_disasm.m_disasm_context;
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m_comment_stream.Clear();
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size_t inst_size = ::LLVMDisasmInstruction(disasm_context,
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const_cast<uint8_t*>(data_start) + data_offset,
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extractor.GetByteSize() - data_offset,
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address.GetFileAddress(),
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out_string.data(),
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out_string.size());
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m_comment_stream.Flush();
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m_no_comments = false;
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m_comment.swap(m_comment_stream.GetString());
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m_disasm.Unlock();
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if (Reparse)
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{
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if (inst_size != m_raw_bytes.size())
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return false;
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}
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else
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{
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if (!inst_size)
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return false;
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PopulateOpcode(extractor, data_offset, inst_size);
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m_raw_bytes.resize(inst_size);
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memcpy(m_raw_bytes.data(), data_start + data_offset, inst_size);
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if (!s_regex_compiled)
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{
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::regcomp(&s_regex, "[ \t]*([^ ^\t]+)[ \t]*([^ ^\t].*)?", REG_EXTENDED);
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s_regex_compiled = true;
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}
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::regmatch_t matches[3];
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const char *out_data = out_string.data();
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if (!::regexec(&s_regex, out_data, sizeof(matches) / sizeof(::regmatch_t), matches, 0))
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{
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if (matches[1].rm_so != -1)
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m_opcode_name.assign(out_data + matches[1].rm_so, matches[1].rm_eo - matches[1].rm_so);
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if (matches[2].rm_so != -1)
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m_mnemocics.assign(out_data + matches[2].rm_so, matches[2].rm_eo - matches[2].rm_so);
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}
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m_is_valid = true;
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}
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return true;
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}
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bool m_is_valid;
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DisassemblerLLVMC &m_disasm;
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std::vector<uint8_t> m_raw_bytes;
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bool m_no_comments;
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StreamString m_comment_stream;
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static bool s_regex_compiled;
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static ::regex_t s_regex;
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};
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bool InstructionLLVMC::s_regex_compiled = false;
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::regex_t InstructionLLVMC::s_regex;
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Disassembler *
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DisassemblerLLVMC::CreateInstance (const ArchSpec &arch)
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{
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std::auto_ptr<DisassemblerLLVMC> disasm_ap (new DisassemblerLLVMC(arch));
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if (disasm_ap.get() && disasm_ap->IsValid())
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return disasm_ap.release();
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return NULL;
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}
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DisassemblerLLVMC::DisassemblerLLVMC (const ArchSpec &arch) :
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Disassembler(arch),
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m_disasm_context(NULL),
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m_alternate_disasm_context(NULL)
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{
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m_disasm_context = ::LLVMCreateDisasm(arch.GetTriple().getTriple().c_str(),
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(void*)this,
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/*TagType=*/1,
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DisassemblerLLVMC::OpInfoCallback,
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DisassemblerLLVMC::SymbolLookupCallback);
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if (arch.GetTriple().getArch() == llvm::Triple::arm)
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{
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m_alternate_disasm_context = ::LLVMCreateDisasm("thumbv7-apple-darwin",
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(void*)this,
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/*TagType=*/1,
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DisassemblerLLVMC::OpInfoCallback,
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DisassemblerLLVMC::SymbolLookupCallback);
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}
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}
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DisassemblerLLVMC::~DisassemblerLLVMC()
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{
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}
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size_t
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DisassemblerLLVMC::DecodeInstructions (const Address &base_addr,
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const DataExtractor& data,
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uint32_t data_offset,
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uint32_t num_instructions,
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bool append)
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{
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if (!append)
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m_instruction_list.Clear();
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if (!IsValid())
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return 0;
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uint32_t data_cursor = data_offset;
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size_t data_byte_size = data.GetByteSize();
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uint32_t instructions_parsed = 0;
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uint64_t instruction_pointer = base_addr.GetFileAddress();
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std::vector<char> out_string(256);
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while (data_offset < data_byte_size && instructions_parsed < num_instructions)
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{
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Address instr_address = base_addr;
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instr_address.Slide(data_cursor);
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AddressClass address_class = eAddressClassUnknown;
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if (m_alternate_disasm_context)
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address_class = instr_address.GetAddressClass ();
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InstructionSP inst_sp(new InstructionLLVMC(*this,
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instr_address,
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address_class));
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if (!inst_sp)
|
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return data_cursor - data_offset;
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uint32_t inst_size = inst_sp->Decode(*this, data, data_cursor);
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if (!inst_size)
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return data_cursor - data_offset;
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m_instruction_list.Append(inst_sp);
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instruction_pointer += inst_size;
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data_cursor += inst_size;
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instructions_parsed++;
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}
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return data_cursor - data_offset;
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}
|
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|
||||
void
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DisassemblerLLVMC::Initialize()
|
||||
{
|
||||
PluginManager::RegisterPlugin (GetPluginNameStatic(),
|
||||
GetPluginDescriptionStatic(),
|
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CreateInstance);
|
||||
|
||||
llvm::InitializeAllTargetInfos();
|
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llvm::InitializeAllTargetMCs();
|
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llvm::InitializeAllAsmParsers();
|
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llvm::InitializeAllDisassemblers();
|
||||
}
|
||||
|
||||
void
|
||||
DisassemblerLLVMC::Terminate()
|
||||
{
|
||||
PluginManager::UnregisterPlugin (CreateInstance);
|
||||
}
|
||||
|
||||
|
||||
const char *
|
||||
DisassemblerLLVMC::GetPluginNameStatic()
|
||||
{
|
||||
return "llvm";
|
||||
}
|
||||
|
||||
const char *
|
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DisassemblerLLVMC::GetPluginDescriptionStatic()
|
||||
{
|
||||
return "Disassembler that uses LLVM opcode tables to disassemble i386, x86_64 and ARM.";
|
||||
}
|
||||
|
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int DisassemblerLLVMC::OpInfoCallback (void *DisInfo,
|
||||
uint64_t PC,
|
||||
uint64_t Offset,
|
||||
uint64_t Size,
|
||||
int TagType,
|
||||
void *TagBug)
|
||||
{
|
||||
return static_cast<DisassemblerLLVMC*>(DisInfo)->OpInfo(PC,
|
||||
Offset,
|
||||
Size,
|
||||
TagType,
|
||||
TagBug);
|
||||
}
|
||||
|
||||
const char *DisassemblerLLVMC::SymbolLookupCallback(void *DisInfo,
|
||||
uint64_t ReferenceValue,
|
||||
uint64_t *ReferenceType,
|
||||
uint64_t ReferencePC,
|
||||
const char **ReferenceName)
|
||||
{
|
||||
return static_cast<DisassemblerLLVMC*>(DisInfo)->SymbolLookup(ReferenceValue,
|
||||
ReferenceType,
|
||||
ReferencePC,
|
||||
ReferenceName);
|
||||
}
|
||||
|
||||
int DisassemblerLLVMC::OpInfo (uint64_t PC,
|
||||
uint64_t Offset,
|
||||
uint64_t Size,
|
||||
int TagType,
|
||||
void *TagBug)
|
||||
{
|
||||
switch (TagType)
|
||||
{
|
||||
default:
|
||||
break;
|
||||
case 1:
|
||||
bzero (TagBug, sizeof(::LLVMOpInfo1));
|
||||
break;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
const char *DisassemblerLLVMC::SymbolLookup (uint64_t ReferenceValue,
|
||||
uint64_t *ReferenceType,
|
||||
uint64_t ReferencePC,
|
||||
const char **ReferenceName)
|
||||
{
|
||||
const char *result_name = NULL;
|
||||
uint64_t result_reference_type = LLVMDisassembler_ReferenceType_InOut_None;
|
||||
const char *result_referred_name = NULL;
|
||||
|
||||
if (m_exe_scope && m_inst)
|
||||
{
|
||||
Address reference_address;
|
||||
|
||||
Target *target = m_exe_scope->CalculateTarget();
|
||||
|
||||
if (target)
|
||||
{
|
||||
if (!target->GetSectionLoadList().IsEmpty())
|
||||
target->GetSectionLoadList().ResolveLoadAddress(ReferenceValue, reference_address);
|
||||
else
|
||||
target->GetImages().ResolveFileAddress(ReferenceValue, reference_address);
|
||||
|
||||
if (reference_address.IsValid())
|
||||
{
|
||||
SymbolContext reference_sc;
|
||||
|
||||
target->GetImages().ResolveSymbolContextForAddress(reference_address,
|
||||
eSymbolContextFunction | eSymbolContextSymbol,
|
||||
reference_sc);
|
||||
|
||||
StreamString ss;
|
||||
|
||||
const bool show_fullpaths = false;
|
||||
const bool show_module = true;
|
||||
const bool show_inlined_frames = false;
|
||||
|
||||
reference_sc.DumpStopContext(&ss,
|
||||
m_exe_scope,
|
||||
reference_address,
|
||||
show_fullpaths,
|
||||
show_module,
|
||||
show_inlined_frames);
|
||||
|
||||
m_inst->AddReferencedAddress(ss.GetString());
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
*ReferenceType = result_reference_type;
|
||||
*ReferenceName = result_referred_name;
|
||||
|
||||
return result_name;
|
||||
}
|
||||
|
||||
//------------------------------------------------------------------
|
||||
// PluginInterface protocol
|
||||
//------------------------------------------------------------------
|
||||
const char *
|
||||
DisassemblerLLVMC::GetPluginName()
|
||||
{
|
||||
return "DisassemblerLLVMC";
|
||||
}
|
||||
|
||||
const char *
|
||||
DisassemblerLLVMC::GetShortPluginName()
|
||||
{
|
||||
return GetPluginNameStatic();
|
||||
}
|
||||
|
||||
uint32_t
|
||||
DisassemblerLLVMC::GetPluginVersion()
|
||||
{
|
||||
return 1;
|
||||
}
|
||||
|
||||
126
lldb/source/Plugins/Disassembler/llvm/DisassemblerLLVMC.h
Normal file
126
lldb/source/Plugins/Disassembler/llvm/DisassemblerLLVMC.h
Normal file
@@ -0,0 +1,126 @@
|
||||
//===-- DisassemblerLLVMC.h -------------------------------------*- C++ -*-===//
|
||||
//
|
||||
// The LLVM Compiler Infrastructure
|
||||
//
|
||||
// This file is distributed under the University of Illinois Open Source
|
||||
// License. See LICENSE.TXT for details.
|
||||
//
|
||||
//===----------------------------------------------------------------------===//
|
||||
|
||||
#ifndef liblldb_DisassemblerLLVMC_h_
|
||||
#define liblldb_DisassemblerLLVMC_h_
|
||||
|
||||
|
||||
#include "llvm-c/Disassembler.h"
|
||||
|
||||
#include "lldb/Core/Address.h"
|
||||
#include "lldb/Core/Disassembler.h"
|
||||
#include "lldb/Core/PluginManager.h"
|
||||
#include "lldb/Host/Mutex.h"
|
||||
|
||||
class InstructionLLVMC;
|
||||
|
||||
class DisassemblerLLVMC : public lldb_private::Disassembler
|
||||
{
|
||||
public:
|
||||
//------------------------------------------------------------------
|
||||
// Static Functions
|
||||
//------------------------------------------------------------------
|
||||
static void
|
||||
Initialize();
|
||||
|
||||
static void
|
||||
Terminate();
|
||||
|
||||
static const char *
|
||||
GetPluginNameStatic();
|
||||
|
||||
static const char *
|
||||
GetPluginDescriptionStatic();
|
||||
|
||||
static lldb_private::Disassembler *
|
||||
CreateInstance(const lldb_private::ArchSpec &arch);
|
||||
|
||||
|
||||
DisassemblerLLVMC(const lldb_private::ArchSpec &arch);
|
||||
|
||||
virtual
|
||||
~DisassemblerLLVMC();
|
||||
|
||||
size_t
|
||||
DecodeInstructions (const lldb_private::Address &base_addr,
|
||||
const lldb_private::DataExtractor& data,
|
||||
uint32_t data_offset,
|
||||
uint32_t num_instructions,
|
||||
bool append);
|
||||
|
||||
//------------------------------------------------------------------
|
||||
// PluginInterface protocol
|
||||
//------------------------------------------------------------------
|
||||
virtual const char *
|
||||
GetPluginName();
|
||||
|
||||
virtual const char *
|
||||
GetShortPluginName();
|
||||
|
||||
virtual uint32_t
|
||||
GetPluginVersion();
|
||||
|
||||
protected:
|
||||
friend class InstructionLLVMC;
|
||||
|
||||
bool
|
||||
IsValid()
|
||||
{
|
||||
return (m_disasm_context != NULL);
|
||||
}
|
||||
|
||||
int OpInfo(uint64_t PC,
|
||||
uint64_t Offset,
|
||||
uint64_t Size,
|
||||
int TagType,
|
||||
void *TagBug);
|
||||
|
||||
const char *SymbolLookup (uint64_t ReferenceValue,
|
||||
uint64_t *ReferenceType,
|
||||
uint64_t ReferencePC,
|
||||
const char **ReferenceName);
|
||||
|
||||
static int OpInfoCallback (void *DisInfo,
|
||||
uint64_t PC,
|
||||
uint64_t Offset,
|
||||
uint64_t Size,
|
||||
int TagType,
|
||||
void *TagBug);
|
||||
|
||||
static const char *SymbolLookupCallback(void *DisInfo,
|
||||
uint64_t ReferenceValue,
|
||||
uint64_t *ReferenceType,
|
||||
uint64_t ReferencePC,
|
||||
const char **ReferenceName);
|
||||
|
||||
void Lock(InstructionLLVMC *inst,
|
||||
lldb_private::ExecutionContextScope *exe_scope)
|
||||
{
|
||||
m_mutex.Lock();
|
||||
|
||||
m_inst = inst;
|
||||
m_exe_scope = exe_scope;
|
||||
}
|
||||
|
||||
void Unlock()
|
||||
{
|
||||
m_exe_scope = NULL;
|
||||
m_inst = NULL;
|
||||
|
||||
m_mutex.Unlock();
|
||||
}
|
||||
|
||||
lldb_private::ExecutionContextScope *m_exe_scope;
|
||||
InstructionLLVMC *m_inst;
|
||||
lldb_private::Mutex m_mutex;
|
||||
::LLVMDisasmContextRef m_disasm_context;
|
||||
::LLVMDisasmContextRef m_alternate_disasm_context;
|
||||
};
|
||||
|
||||
#endif // liblldb_DisassemblerLLVM_h_
|
||||
@@ -26,6 +26,7 @@
|
||||
#include "Plugins/ABI/MacOSX-arm/ABIMacOSX_arm.h"
|
||||
#include "Plugins/ABI/SysV-x86_64/ABISysV_x86_64.h"
|
||||
#include "Plugins/Disassembler/llvm/DisassemblerLLVM.h"
|
||||
#include "Plugins/Disassembler/llvm/DisassemblerLLVMC.h"
|
||||
#include "Plugins/Instruction/ARM/EmulateInstructionARM.h"
|
||||
#include "Plugins/SymbolVendor/MacOSX/SymbolVendorMacOSX.h"
|
||||
#include "Plugins/ObjectContainer/BSD-Archive/ObjectContainerBSDArchive.h"
|
||||
@@ -72,6 +73,7 @@
|
||||
using namespace lldb;
|
||||
using namespace lldb_private;
|
||||
|
||||
//#define USE_NEW_DISASSEMBLER
|
||||
|
||||
void
|
||||
lldb_private::Initialize ()
|
||||
@@ -91,7 +93,11 @@ lldb_private::Initialize ()
|
||||
ABIMacOSX_i386::Initialize();
|
||||
ABIMacOSX_arm::Initialize();
|
||||
ABISysV_x86_64::Initialize();
|
||||
#if defined (USE_NEW_DISASSEMBLER)
|
||||
DisassemblerLLVMC::Initialize();
|
||||
#else
|
||||
DisassemblerLLVM::Initialize();
|
||||
#endif
|
||||
ObjectContainerBSDArchive::Initialize();
|
||||
ObjectFileELF::Initialize();
|
||||
SymbolFileDWARF::Initialize();
|
||||
@@ -166,7 +172,11 @@ lldb_private::Terminate ()
|
||||
ABIMacOSX_i386::Terminate();
|
||||
ABIMacOSX_arm::Terminate();
|
||||
ABISysV_x86_64::Terminate();
|
||||
#if defined (USE_NEW_DISASSEMBLER)
|
||||
DisassemblerLLVMC::Terminate();
|
||||
#else
|
||||
DisassemblerLLVM::Terminate();
|
||||
#endif
|
||||
ObjectContainerBSDArchive::Terminate();
|
||||
ObjectFileELF::Terminate();
|
||||
SymbolFileDWARF::Terminate();
|
||||
|
||||
Reference in New Issue
Block a user