49bce8ecdb
detection of kernels into the object file and adding a new category for raw binary images. Fixed all clients who previously searched for sections manually, making them use the object file's facilities instead. llvm-svn: 150272
2253 lines
107 KiB
C++
2253 lines
107 KiB
C++
//===-- ObjectFileMachO.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 "llvm/ADT/StringRef.h"
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#include "llvm/Support/MachO.h"
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#include "ObjectFileMachO.h"
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#include "lldb/Core/ArchSpec.h"
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#include "lldb/Core/DataBuffer.h"
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#include "lldb/Core/FileSpecList.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Core/PluginManager.h"
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#include "lldb/Core/Section.h"
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#include "lldb/Core/StreamFile.h"
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#include "lldb/Core/StreamString.h"
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#include "lldb/Core/Timer.h"
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#include "lldb/Core/UUID.h"
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#include "lldb/Host/Host.h"
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#include "lldb/Host/FileSpec.h"
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#include "lldb/Symbol/ClangNamespaceDecl.h"
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#include "lldb/Symbol/ObjectFile.h"
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#include "lldb/Target/Process.h"
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#include "Plugins/Process/Utility/RegisterContextDarwin_x86_64.h"
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using namespace lldb;
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using namespace lldb_private;
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using namespace llvm::MachO;
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class RegisterContextDarwin_x86_64_Mach : public RegisterContextDarwin_x86_64
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{
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public:
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RegisterContextDarwin_x86_64_Mach (lldb_private::Thread &thread, const DataExtractor &data) :
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RegisterContextDarwin_x86_64 (thread, 0)
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{
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SetRegisterDataFrom_LC_THREAD (data);
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}
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virtual void
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InvalidateAllRegisters ()
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{
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// Do nothing... registers are always valid...
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}
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void
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SetRegisterDataFrom_LC_THREAD (const DataExtractor &data)
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{
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int flavor;
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uint32_t offset = 0;
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SetError (GPRRegSet, Read, -1);
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SetError (FPURegSet, Read, -1);
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SetError (EXCRegSet, Read, -1);
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while ((flavor = data.GetU32 (&offset)) > 0)
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{
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uint32_t i;
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uint32_t count = data.GetU32 (&offset);
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switch (flavor)
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{
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case 7:
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case 8:
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case 9:
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// Goofy extra flavor inside state...
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flavor = data.GetU32 (&offset);
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count = data.GetU32 (&offset);
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default:
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break;
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}
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switch (flavor)
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{
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case GPRRegSet:
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for (i=0; i<count; ++i)
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(&gpr.rax)[i] = data.GetU64(&offset);
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SetError (GPRRegSet, Read, 0);
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break;
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case FPURegSet:
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// TODO: fill in FPU regs....
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//SetError (FPURegSet, Read, -1);
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break;
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case EXCRegSet:
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exc.trapno = data.GetU32(&offset);
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exc.err = data.GetU32(&offset);
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exc.faultvaddr = data.GetU64(&offset);
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SetError (EXCRegSet, Read, 0);
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break;
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}
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}
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}
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protected:
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virtual int
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DoReadGPR (lldb::tid_t tid, int flavor, GPR &gpr)
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{
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return 0;
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}
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virtual int
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DoReadFPU (lldb::tid_t tid, int flavor, FPU &fpu)
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{
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return 0;
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}
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virtual int
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DoReadEXC (lldb::tid_t tid, int flavor, EXC &exc)
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{
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return 0;
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}
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virtual int
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DoWriteGPR (lldb::tid_t tid, int flavor, const GPR &gpr)
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{
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return 0;
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}
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virtual int
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DoWriteFPU (lldb::tid_t tid, int flavor, const FPU &fpu)
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{
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return 0;
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}
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virtual int
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DoWriteEXC (lldb::tid_t tid, int flavor, const EXC &exc)
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{
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return 0;
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}
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};
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#define MACHO_NLIST_ARM_SYMBOL_IS_THUMB 0x0008
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void
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ObjectFileMachO::Initialize()
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{
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PluginManager::RegisterPlugin (GetPluginNameStatic(),
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GetPluginDescriptionStatic(),
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CreateInstance,
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CreateMemoryInstance);
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}
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void
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ObjectFileMachO::Terminate()
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{
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PluginManager::UnregisterPlugin (CreateInstance);
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}
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const char *
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ObjectFileMachO::GetPluginNameStatic()
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{
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return "object-file.mach-o";
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}
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const char *
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ObjectFileMachO::GetPluginDescriptionStatic()
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{
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return "Mach-o object file reader (32 and 64 bit)";
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}
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ObjectFile *
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ObjectFileMachO::CreateInstance (Module* module, DataBufferSP& data_sp, const FileSpec* file, addr_t offset, addr_t length)
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{
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if (ObjectFileMachO::MagicBytesMatch(data_sp, offset, length))
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{
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std::auto_ptr<ObjectFile> objfile_ap(new ObjectFileMachO (module, data_sp, file, offset, length));
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if (objfile_ap.get() && objfile_ap->ParseHeader())
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return objfile_ap.release();
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}
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return NULL;
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}
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ObjectFile *
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ObjectFileMachO::CreateMemoryInstance (Module* module,
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DataBufferSP& data_sp,
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const ProcessSP &process_sp,
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lldb::addr_t header_addr)
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{
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if (ObjectFileMachO::MagicBytesMatch(data_sp, 0, data_sp->GetByteSize()))
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{
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std::auto_ptr<ObjectFile> objfile_ap(new ObjectFileMachO (module, data_sp, process_sp, header_addr));
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if (objfile_ap.get() && objfile_ap->ParseHeader())
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return objfile_ap.release();
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}
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return NULL;
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}
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const ConstString &
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ObjectFileMachO::GetSegmentNameTEXT()
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{
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static ConstString g_segment_name_TEXT ("__TEXT");
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return g_segment_name_TEXT;
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}
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const ConstString &
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ObjectFileMachO::GetSegmentNameDATA()
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{
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static ConstString g_segment_name_DATA ("__DATA");
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return g_segment_name_DATA;
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}
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const ConstString &
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ObjectFileMachO::GetSegmentNameOBJC()
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{
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static ConstString g_segment_name_OBJC ("__OBJC");
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return g_segment_name_OBJC;
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}
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const ConstString &
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ObjectFileMachO::GetSegmentNameLINKEDIT()
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{
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static ConstString g_section_name_LINKEDIT ("__LINKEDIT");
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return g_section_name_LINKEDIT;
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}
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const ConstString &
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ObjectFileMachO::GetSectionNameEHFrame()
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{
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static ConstString g_section_name_eh_frame ("__eh_frame");
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return g_section_name_eh_frame;
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}
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static uint32_t
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MachHeaderSizeFromMagic(uint32_t magic)
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{
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switch (magic)
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{
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case HeaderMagic32:
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case HeaderMagic32Swapped:
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return sizeof(struct mach_header);
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case HeaderMagic64:
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case HeaderMagic64Swapped:
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return sizeof(struct mach_header_64);
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break;
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default:
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break;
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}
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return 0;
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}
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bool
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ObjectFileMachO::MagicBytesMatch (DataBufferSP& data_sp,
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lldb::addr_t data_offset,
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lldb::addr_t data_length)
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{
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DataExtractor data;
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data.SetData (data_sp, data_offset, data_length);
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uint32_t offset = 0;
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uint32_t magic = data.GetU32(&offset);
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return MachHeaderSizeFromMagic(magic) != 0;
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}
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ObjectFileMachO::ObjectFileMachO(Module* module, DataBufferSP& data_sp, const FileSpec* file, addr_t offset, addr_t length) :
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ObjectFile(module, file, offset, length, data_sp),
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m_mutex (Mutex::eMutexTypeRecursive),
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m_sections_ap(),
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m_symtab_ap(),
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m_mach_segments(),
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m_mach_sections(),
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m_entry_point_address(),
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m_thread_context_offsets(),
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m_thread_context_offsets_valid(false)
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{
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::memset (&m_header, 0, sizeof(m_header));
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::memset (&m_dysymtab, 0, sizeof(m_dysymtab));
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}
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ObjectFileMachO::ObjectFileMachO (lldb_private::Module* module,
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lldb::DataBufferSP& header_data_sp,
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const lldb::ProcessSP &process_sp,
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lldb::addr_t header_addr) :
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ObjectFile(module, process_sp, header_addr, header_data_sp),
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m_mutex (Mutex::eMutexTypeRecursive),
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m_sections_ap(),
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m_symtab_ap(),
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m_mach_segments(),
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m_mach_sections(),
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m_entry_point_address(),
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m_thread_context_offsets(),
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m_thread_context_offsets_valid(false)
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{
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::memset (&m_header, 0, sizeof(m_header));
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::memset (&m_dysymtab, 0, sizeof(m_dysymtab));
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}
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ObjectFileMachO::~ObjectFileMachO()
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{
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}
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bool
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ObjectFileMachO::ParseHeader ()
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{
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lldb_private::Mutex::Locker locker(m_mutex);
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bool can_parse = false;
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uint32_t offset = 0;
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m_data.SetByteOrder (lldb::endian::InlHostByteOrder());
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// Leave magic in the original byte order
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m_header.magic = m_data.GetU32(&offset);
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switch (m_header.magic)
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{
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case HeaderMagic32:
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m_data.SetByteOrder (lldb::endian::InlHostByteOrder());
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m_data.SetAddressByteSize(4);
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can_parse = true;
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break;
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case HeaderMagic64:
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m_data.SetByteOrder (lldb::endian::InlHostByteOrder());
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m_data.SetAddressByteSize(8);
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can_parse = true;
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break;
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case HeaderMagic32Swapped:
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m_data.SetByteOrder(lldb::endian::InlHostByteOrder() == eByteOrderBig ? eByteOrderLittle : eByteOrderBig);
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m_data.SetAddressByteSize(4);
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can_parse = true;
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break;
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case HeaderMagic64Swapped:
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m_data.SetByteOrder(lldb::endian::InlHostByteOrder() == eByteOrderBig ? eByteOrderLittle : eByteOrderBig);
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m_data.SetAddressByteSize(8);
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can_parse = true;
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break;
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default:
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break;
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}
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if (can_parse)
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{
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m_data.GetU32(&offset, &m_header.cputype, 6);
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ArchSpec mach_arch(eArchTypeMachO, m_header.cputype, m_header.cpusubtype);
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if (SetModulesArchitecture (mach_arch))
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{
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const size_t header_and_lc_size = m_header.sizeofcmds + MachHeaderSizeFromMagic(m_header.magic);
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if (m_data.GetByteSize() < header_and_lc_size)
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{
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DataBufferSP data_sp;
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ProcessSP process_sp (m_process_wp.lock());
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if (process_sp)
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{
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data_sp = ReadMemory (process_sp, m_offset, header_and_lc_size);
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}
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else
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{
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// Read in all only the load command data from the file on disk
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data_sp = m_file.ReadFileContents(m_offset, header_and_lc_size);
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if (data_sp->GetByteSize() != header_and_lc_size)
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return false;
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}
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if (data_sp)
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m_data.SetData (data_sp);
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}
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}
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return true;
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}
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else
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{
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memset(&m_header, 0, sizeof(struct mach_header));
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}
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return false;
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}
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ByteOrder
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ObjectFileMachO::GetByteOrder () const
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{
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lldb_private::Mutex::Locker locker(m_mutex);
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return m_data.GetByteOrder ();
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}
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bool
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ObjectFileMachO::IsExecutable() const
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{
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return m_header.filetype == HeaderFileTypeExecutable;
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}
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size_t
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ObjectFileMachO::GetAddressByteSize () const
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{
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lldb_private::Mutex::Locker locker(m_mutex);
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return m_data.GetAddressByteSize ();
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}
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AddressClass
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ObjectFileMachO::GetAddressClass (lldb::addr_t file_addr)
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{
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Symtab *symtab = GetSymtab();
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if (symtab)
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{
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Symbol *symbol = symtab->FindSymbolContainingFileAddress(file_addr);
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if (symbol)
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{
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const AddressRange *range_ptr = symbol->GetAddressRangePtr();
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if (range_ptr)
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{
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const Section *section = range_ptr->GetBaseAddress().GetSection();
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if (section)
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{
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const SectionType section_type = section->GetType();
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switch (section_type)
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{
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case eSectionTypeInvalid: return eAddressClassUnknown;
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case eSectionTypeCode:
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if (m_header.cputype == llvm::MachO::CPUTypeARM)
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{
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// For ARM we have a bit in the n_desc field of the symbol
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// that tells us ARM/Thumb which is bit 0x0008.
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if (symbol->GetFlags() & MACHO_NLIST_ARM_SYMBOL_IS_THUMB)
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return eAddressClassCodeAlternateISA;
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}
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return eAddressClassCode;
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case eSectionTypeContainer: return eAddressClassUnknown;
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case eSectionTypeData:
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case eSectionTypeDataCString:
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case eSectionTypeDataCStringPointers:
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case eSectionTypeDataSymbolAddress:
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case eSectionTypeData4:
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case eSectionTypeData8:
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case eSectionTypeData16:
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case eSectionTypeDataPointers:
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case eSectionTypeZeroFill:
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case eSectionTypeDataObjCMessageRefs:
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case eSectionTypeDataObjCCFStrings:
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return eAddressClassData;
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case eSectionTypeDebug:
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case eSectionTypeDWARFDebugAbbrev:
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case eSectionTypeDWARFDebugAranges:
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case eSectionTypeDWARFDebugFrame:
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case eSectionTypeDWARFDebugInfo:
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case eSectionTypeDWARFDebugLine:
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case eSectionTypeDWARFDebugLoc:
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case eSectionTypeDWARFDebugMacInfo:
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case eSectionTypeDWARFDebugPubNames:
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case eSectionTypeDWARFDebugPubTypes:
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case eSectionTypeDWARFDebugRanges:
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case eSectionTypeDWARFDebugStr:
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case eSectionTypeDWARFAppleNames:
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case eSectionTypeDWARFAppleTypes:
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case eSectionTypeDWARFAppleNamespaces:
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case eSectionTypeDWARFAppleObjC:
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return eAddressClassDebug;
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case eSectionTypeEHFrame: return eAddressClassRuntime;
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case eSectionTypeOther: return eAddressClassUnknown;
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}
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}
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}
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const SymbolType symbol_type = symbol->GetType();
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switch (symbol_type)
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{
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case eSymbolTypeAny: return eAddressClassUnknown;
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case eSymbolTypeAbsolute: return eAddressClassUnknown;
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case eSymbolTypeCode:
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case eSymbolTypeTrampoline:
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if (m_header.cputype == llvm::MachO::CPUTypeARM)
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{
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// For ARM we have a bit in the n_desc field of the symbol
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// that tells us ARM/Thumb which is bit 0x0008.
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if (symbol->GetFlags() & MACHO_NLIST_ARM_SYMBOL_IS_THUMB)
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return eAddressClassCodeAlternateISA;
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}
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return eAddressClassCode;
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case eSymbolTypeData: return eAddressClassData;
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case eSymbolTypeRuntime: return eAddressClassRuntime;
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case eSymbolTypeException: return eAddressClassRuntime;
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case eSymbolTypeSourceFile: return eAddressClassDebug;
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case eSymbolTypeHeaderFile: return eAddressClassDebug;
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case eSymbolTypeObjectFile: return eAddressClassDebug;
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case eSymbolTypeCommonBlock: return eAddressClassDebug;
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case eSymbolTypeBlock: return eAddressClassDebug;
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case eSymbolTypeLocal: return eAddressClassData;
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case eSymbolTypeParam: return eAddressClassData;
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case eSymbolTypeVariable: return eAddressClassData;
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case eSymbolTypeVariableType: return eAddressClassDebug;
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case eSymbolTypeLineEntry: return eAddressClassDebug;
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case eSymbolTypeLineHeader: return eAddressClassDebug;
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case eSymbolTypeScopeBegin: return eAddressClassDebug;
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case eSymbolTypeScopeEnd: return eAddressClassDebug;
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case eSymbolTypeAdditional: return eAddressClassUnknown;
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case eSymbolTypeCompiler: return eAddressClassDebug;
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case eSymbolTypeInstrumentation:return eAddressClassDebug;
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case eSymbolTypeUndefined: return eAddressClassUnknown;
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case eSymbolTypeObjCClass: return eAddressClassRuntime;
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case eSymbolTypeObjCMetaClass: return eAddressClassRuntime;
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case eSymbolTypeObjCIVar: return eAddressClassRuntime;
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}
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}
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}
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return eAddressClassUnknown;
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}
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Symtab *
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ObjectFileMachO::GetSymtab()
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{
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lldb_private::Mutex::Locker symfile_locker(m_mutex);
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if (m_symtab_ap.get() == NULL)
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{
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m_symtab_ap.reset(new Symtab(this));
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Mutex::Locker symtab_locker (m_symtab_ap->GetMutex());
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ParseSymtab (true);
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m_symtab_ap->Finalize ();
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}
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return m_symtab_ap.get();
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}
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SectionList *
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ObjectFileMachO::GetSectionList()
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{
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lldb_private::Mutex::Locker locker(m_mutex);
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if (m_sections_ap.get() == NULL)
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{
|
|
m_sections_ap.reset(new SectionList());
|
|
ParseSections();
|
|
}
|
|
return m_sections_ap.get();
|
|
}
|
|
|
|
|
|
size_t
|
|
ObjectFileMachO::ParseSections ()
|
|
{
|
|
lldb::user_id_t segID = 0;
|
|
lldb::user_id_t sectID = 0;
|
|
struct segment_command_64 load_cmd;
|
|
uint32_t offset = MachHeaderSizeFromMagic(m_header.magic);
|
|
uint32_t i;
|
|
const bool is_core = GetType() == eTypeCoreFile;
|
|
//bool dump_sections = false;
|
|
for (i=0; i<m_header.ncmds; ++i)
|
|
{
|
|
const uint32_t load_cmd_offset = offset;
|
|
if (m_data.GetU32(&offset, &load_cmd, 2) == NULL)
|
|
break;
|
|
|
|
if (load_cmd.cmd == LoadCommandSegment32 || load_cmd.cmd == LoadCommandSegment64)
|
|
{
|
|
if (m_data.GetU8(&offset, (uint8_t*)load_cmd.segname, 16))
|
|
{
|
|
load_cmd.vmaddr = m_data.GetAddress(&offset);
|
|
load_cmd.vmsize = m_data.GetAddress(&offset);
|
|
load_cmd.fileoff = m_data.GetAddress(&offset);
|
|
load_cmd.filesize = m_data.GetAddress(&offset);
|
|
if (m_data.GetU32(&offset, &load_cmd.maxprot, 4))
|
|
{
|
|
|
|
const bool segment_is_encrypted = (load_cmd.flags & SegmentCommandFlagBitProtectedVersion1) != 0;
|
|
|
|
// Keep a list of mach segments around in case we need to
|
|
// get at data that isn't stored in the abstracted Sections.
|
|
m_mach_segments.push_back (load_cmd);
|
|
|
|
ConstString segment_name (load_cmd.segname, std::min<int>(strlen(load_cmd.segname), sizeof(load_cmd.segname)));
|
|
// Use a segment ID of the segment index shifted left by 8 so they
|
|
// never conflict with any of the sections.
|
|
SectionSP segment_sp;
|
|
if (segment_name || is_core)
|
|
{
|
|
segment_sp.reset(new Section (NULL,
|
|
GetModule(), // Module to which this section belongs
|
|
++segID << 8, // Section ID is the 1 based segment index shifted right by 8 bits as not to collide with any of the 256 section IDs that are possible
|
|
segment_name, // Name of this section
|
|
eSectionTypeContainer, // This section is a container of other sections.
|
|
load_cmd.vmaddr, // File VM address == addresses as they are found in the object file
|
|
load_cmd.vmsize, // VM size in bytes of this section
|
|
load_cmd.fileoff, // Offset to the data for this section in the file
|
|
load_cmd.filesize, // Size in bytes of this section as found in the the file
|
|
load_cmd.flags)); // Flags for this section
|
|
|
|
segment_sp->SetIsEncrypted (segment_is_encrypted);
|
|
m_sections_ap->AddSection(segment_sp);
|
|
}
|
|
|
|
struct section_64 sect64;
|
|
::memset (§64, 0, sizeof(sect64));
|
|
// Push a section into our mach sections for the section at
|
|
// index zero (NListSectionNoSection) if we don't have any
|
|
// mach sections yet...
|
|
if (m_mach_sections.empty())
|
|
m_mach_sections.push_back(sect64);
|
|
uint32_t segment_sect_idx;
|
|
const lldb::user_id_t first_segment_sectID = sectID + 1;
|
|
|
|
|
|
const uint32_t num_u32s = load_cmd.cmd == LoadCommandSegment32 ? 7 : 8;
|
|
for (segment_sect_idx=0; segment_sect_idx<load_cmd.nsects; ++segment_sect_idx)
|
|
{
|
|
if (m_data.GetU8(&offset, (uint8_t*)sect64.sectname, sizeof(sect64.sectname)) == NULL)
|
|
break;
|
|
if (m_data.GetU8(&offset, (uint8_t*)sect64.segname, sizeof(sect64.segname)) == NULL)
|
|
break;
|
|
sect64.addr = m_data.GetAddress(&offset);
|
|
sect64.size = m_data.GetAddress(&offset);
|
|
|
|
if (m_data.GetU32(&offset, §64.offset, num_u32s) == NULL)
|
|
break;
|
|
|
|
// Keep a list of mach sections around in case we need to
|
|
// get at data that isn't stored in the abstracted Sections.
|
|
m_mach_sections.push_back (sect64);
|
|
|
|
ConstString section_name (sect64.sectname, std::min<size_t>(strlen(sect64.sectname), sizeof(sect64.sectname)));
|
|
if (!segment_name)
|
|
{
|
|
// We have a segment with no name so we need to conjure up
|
|
// segments that correspond to the section's segname if there
|
|
// isn't already such a section. If there is such a section,
|
|
// we resize the section so that it spans all sections.
|
|
// We also mark these sections as fake so address matches don't
|
|
// hit if they land in the gaps between the child sections.
|
|
segment_name.SetTrimmedCStringWithLength(sect64.segname, sizeof(sect64.segname));
|
|
segment_sp = m_sections_ap->FindSectionByName (segment_name);
|
|
if (segment_sp.get())
|
|
{
|
|
Section *segment = segment_sp.get();
|
|
// Grow the section size as needed.
|
|
const lldb::addr_t sect64_min_addr = sect64.addr;
|
|
const lldb::addr_t sect64_max_addr = sect64_min_addr + sect64.size;
|
|
const lldb::addr_t curr_seg_byte_size = segment->GetByteSize();
|
|
const lldb::addr_t curr_seg_min_addr = segment->GetFileAddress();
|
|
const lldb::addr_t curr_seg_max_addr = curr_seg_min_addr + curr_seg_byte_size;
|
|
if (sect64_min_addr >= curr_seg_min_addr)
|
|
{
|
|
const lldb::addr_t new_seg_byte_size = sect64_max_addr - curr_seg_min_addr;
|
|
// Only grow the section size if needed
|
|
if (new_seg_byte_size > curr_seg_byte_size)
|
|
segment->SetByteSize (new_seg_byte_size);
|
|
}
|
|
else
|
|
{
|
|
// We need to change the base address of the segment and
|
|
// adjust the child section offsets for all existing children.
|
|
const lldb::addr_t slide_amount = sect64_min_addr - curr_seg_min_addr;
|
|
segment->Slide(slide_amount, false);
|
|
segment->GetChildren().Slide (-slide_amount, false);
|
|
segment->SetByteSize (curr_seg_max_addr - sect64_min_addr);
|
|
}
|
|
|
|
// Grow the section size as needed.
|
|
if (sect64.offset)
|
|
{
|
|
const lldb::addr_t segment_min_file_offset = segment->GetFileOffset();
|
|
const lldb::addr_t segment_max_file_offset = segment_min_file_offset + segment->GetFileSize();
|
|
|
|
const lldb::addr_t section_min_file_offset = sect64.offset;
|
|
const lldb::addr_t section_max_file_offset = section_min_file_offset + sect64.size;
|
|
const lldb::addr_t new_file_offset = std::min (section_min_file_offset, segment_min_file_offset);
|
|
const lldb::addr_t new_file_size = std::max (section_max_file_offset, segment_max_file_offset) - new_file_offset;
|
|
segment->SetFileOffset (new_file_offset);
|
|
segment->SetFileSize (new_file_size);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// Create a fake section for the section's named segment
|
|
segment_sp.reset(new Section(segment_sp.get(), // Parent section
|
|
GetModule(), // Module to which this section belongs
|
|
++segID << 8, // Section ID is the 1 based segment index shifted right by 8 bits as not to collide with any of the 256 section IDs that are possible
|
|
segment_name, // Name of this section
|
|
eSectionTypeContainer, // This section is a container of other sections.
|
|
sect64.addr, // File VM address == addresses as they are found in the object file
|
|
sect64.size, // VM size in bytes of this section
|
|
sect64.offset, // Offset to the data for this section in the file
|
|
sect64.offset ? sect64.size : 0, // Size in bytes of this section as found in the the file
|
|
load_cmd.flags)); // Flags for this section
|
|
segment_sp->SetIsFake(true);
|
|
m_sections_ap->AddSection(segment_sp);
|
|
segment_sp->SetIsEncrypted (segment_is_encrypted);
|
|
}
|
|
}
|
|
assert (segment_sp.get());
|
|
|
|
uint32_t mach_sect_type = sect64.flags & SectionFlagMaskSectionType;
|
|
static ConstString g_sect_name_objc_data ("__objc_data");
|
|
static ConstString g_sect_name_objc_msgrefs ("__objc_msgrefs");
|
|
static ConstString g_sect_name_objc_selrefs ("__objc_selrefs");
|
|
static ConstString g_sect_name_objc_classrefs ("__objc_classrefs");
|
|
static ConstString g_sect_name_objc_superrefs ("__objc_superrefs");
|
|
static ConstString g_sect_name_objc_const ("__objc_const");
|
|
static ConstString g_sect_name_objc_classlist ("__objc_classlist");
|
|
static ConstString g_sect_name_cfstring ("__cfstring");
|
|
|
|
static ConstString g_sect_name_dwarf_debug_abbrev ("__debug_abbrev");
|
|
static ConstString g_sect_name_dwarf_debug_aranges ("__debug_aranges");
|
|
static ConstString g_sect_name_dwarf_debug_frame ("__debug_frame");
|
|
static ConstString g_sect_name_dwarf_debug_info ("__debug_info");
|
|
static ConstString g_sect_name_dwarf_debug_line ("__debug_line");
|
|
static ConstString g_sect_name_dwarf_debug_loc ("__debug_loc");
|
|
static ConstString g_sect_name_dwarf_debug_macinfo ("__debug_macinfo");
|
|
static ConstString g_sect_name_dwarf_debug_pubnames ("__debug_pubnames");
|
|
static ConstString g_sect_name_dwarf_debug_pubtypes ("__debug_pubtypes");
|
|
static ConstString g_sect_name_dwarf_debug_ranges ("__debug_ranges");
|
|
static ConstString g_sect_name_dwarf_debug_str ("__debug_str");
|
|
static ConstString g_sect_name_dwarf_apple_names ("__apple_names");
|
|
static ConstString g_sect_name_dwarf_apple_types ("__apple_types");
|
|
static ConstString g_sect_name_dwarf_apple_namespaces ("__apple_namespac");
|
|
static ConstString g_sect_name_dwarf_apple_objc ("__apple_objc");
|
|
static ConstString g_sect_name_eh_frame ("__eh_frame");
|
|
static ConstString g_sect_name_DATA ("__DATA");
|
|
static ConstString g_sect_name_TEXT ("__TEXT");
|
|
|
|
SectionType sect_type = eSectionTypeOther;
|
|
|
|
if (section_name == g_sect_name_dwarf_debug_abbrev)
|
|
sect_type = eSectionTypeDWARFDebugAbbrev;
|
|
else if (section_name == g_sect_name_dwarf_debug_aranges)
|
|
sect_type = eSectionTypeDWARFDebugAranges;
|
|
else if (section_name == g_sect_name_dwarf_debug_frame)
|
|
sect_type = eSectionTypeDWARFDebugFrame;
|
|
else if (section_name == g_sect_name_dwarf_debug_info)
|
|
sect_type = eSectionTypeDWARFDebugInfo;
|
|
else if (section_name == g_sect_name_dwarf_debug_line)
|
|
sect_type = eSectionTypeDWARFDebugLine;
|
|
else if (section_name == g_sect_name_dwarf_debug_loc)
|
|
sect_type = eSectionTypeDWARFDebugLoc;
|
|
else if (section_name == g_sect_name_dwarf_debug_macinfo)
|
|
sect_type = eSectionTypeDWARFDebugMacInfo;
|
|
else if (section_name == g_sect_name_dwarf_debug_pubnames)
|
|
sect_type = eSectionTypeDWARFDebugPubNames;
|
|
else if (section_name == g_sect_name_dwarf_debug_pubtypes)
|
|
sect_type = eSectionTypeDWARFDebugPubTypes;
|
|
else if (section_name == g_sect_name_dwarf_debug_ranges)
|
|
sect_type = eSectionTypeDWARFDebugRanges;
|
|
else if (section_name == g_sect_name_dwarf_debug_str)
|
|
sect_type = eSectionTypeDWARFDebugStr;
|
|
else if (section_name == g_sect_name_dwarf_apple_names)
|
|
sect_type = eSectionTypeDWARFAppleNames;
|
|
else if (section_name == g_sect_name_dwarf_apple_types)
|
|
sect_type = eSectionTypeDWARFAppleTypes;
|
|
else if (section_name == g_sect_name_dwarf_apple_namespaces)
|
|
sect_type = eSectionTypeDWARFAppleNamespaces;
|
|
else if (section_name == g_sect_name_dwarf_apple_objc)
|
|
sect_type = eSectionTypeDWARFAppleObjC;
|
|
else if (section_name == g_sect_name_objc_selrefs)
|
|
sect_type = eSectionTypeDataCStringPointers;
|
|
else if (section_name == g_sect_name_objc_msgrefs)
|
|
sect_type = eSectionTypeDataObjCMessageRefs;
|
|
else if (section_name == g_sect_name_eh_frame)
|
|
sect_type = eSectionTypeEHFrame;
|
|
else if (section_name == g_sect_name_cfstring)
|
|
sect_type = eSectionTypeDataObjCCFStrings;
|
|
else if (section_name == g_sect_name_objc_data ||
|
|
section_name == g_sect_name_objc_classrefs ||
|
|
section_name == g_sect_name_objc_superrefs ||
|
|
section_name == g_sect_name_objc_const ||
|
|
section_name == g_sect_name_objc_classlist)
|
|
{
|
|
sect_type = eSectionTypeDataPointers;
|
|
}
|
|
|
|
if (sect_type == eSectionTypeOther)
|
|
{
|
|
switch (mach_sect_type)
|
|
{
|
|
// TODO: categorize sections by other flags for regular sections
|
|
case SectionTypeRegular:
|
|
if (segment_sp->GetName() == g_sect_name_TEXT)
|
|
sect_type = eSectionTypeCode;
|
|
else if (segment_sp->GetName() == g_sect_name_DATA)
|
|
sect_type = eSectionTypeData;
|
|
else
|
|
sect_type = eSectionTypeOther;
|
|
break;
|
|
case SectionTypeZeroFill: sect_type = eSectionTypeZeroFill; break;
|
|
case SectionTypeCStringLiterals: sect_type = eSectionTypeDataCString; break; // section with only literal C strings
|
|
case SectionType4ByteLiterals: sect_type = eSectionTypeData4; break; // section with only 4 byte literals
|
|
case SectionType8ByteLiterals: sect_type = eSectionTypeData8; break; // section with only 8 byte literals
|
|
case SectionTypeLiteralPointers: sect_type = eSectionTypeDataPointers; break; // section with only pointers to literals
|
|
case SectionTypeNonLazySymbolPointers: sect_type = eSectionTypeDataPointers; break; // section with only non-lazy symbol pointers
|
|
case SectionTypeLazySymbolPointers: sect_type = eSectionTypeDataPointers; break; // section with only lazy symbol pointers
|
|
case SectionTypeSymbolStubs: sect_type = eSectionTypeCode; break; // section with only symbol stubs, byte size of stub in the reserved2 field
|
|
case SectionTypeModuleInitFunctionPointers: sect_type = eSectionTypeDataPointers; break; // section with only function pointers for initialization
|
|
case SectionTypeModuleTermFunctionPointers: sect_type = eSectionTypeDataPointers; break; // section with only function pointers for termination
|
|
case SectionTypeCoalesced: sect_type = eSectionTypeOther; break;
|
|
case SectionTypeZeroFillLarge: sect_type = eSectionTypeZeroFill; break;
|
|
case SectionTypeInterposing: sect_type = eSectionTypeCode; break; // section with only pairs of function pointers for interposing
|
|
case SectionType16ByteLiterals: sect_type = eSectionTypeData16; break; // section with only 16 byte literals
|
|
case SectionTypeDTraceObjectFormat: sect_type = eSectionTypeDebug; break;
|
|
case SectionTypeLazyDylibSymbolPointers: sect_type = eSectionTypeDataPointers; break;
|
|
default: break;
|
|
}
|
|
}
|
|
|
|
SectionSP section_sp(new Section(segment_sp.get(),
|
|
GetModule(),
|
|
++sectID,
|
|
section_name,
|
|
sect_type,
|
|
sect64.addr - segment_sp->GetFileAddress(),
|
|
sect64.size,
|
|
sect64.offset,
|
|
sect64.offset == 0 ? 0 : sect64.size,
|
|
sect64.flags));
|
|
// Set the section to be encrypted to match the segment
|
|
section_sp->SetIsEncrypted (segment_is_encrypted);
|
|
|
|
segment_sp->GetChildren().AddSection(section_sp);
|
|
|
|
if (segment_sp->IsFake())
|
|
{
|
|
segment_sp.reset();
|
|
segment_name.Clear();
|
|
}
|
|
}
|
|
if (segment_sp && m_header.filetype == HeaderFileTypeDSYM)
|
|
{
|
|
if (first_segment_sectID <= sectID)
|
|
{
|
|
lldb::user_id_t sect_uid;
|
|
for (sect_uid = first_segment_sectID; sect_uid <= sectID; ++sect_uid)
|
|
{
|
|
SectionSP curr_section_sp(segment_sp->GetChildren().FindSectionByID (sect_uid));
|
|
SectionSP next_section_sp;
|
|
if (sect_uid + 1 <= sectID)
|
|
next_section_sp = segment_sp->GetChildren().FindSectionByID (sect_uid+1);
|
|
|
|
if (curr_section_sp.get())
|
|
{
|
|
if (curr_section_sp->GetByteSize() == 0)
|
|
{
|
|
if (next_section_sp.get() != NULL)
|
|
curr_section_sp->SetByteSize ( next_section_sp->GetFileAddress() - curr_section_sp->GetFileAddress() );
|
|
else
|
|
curr_section_sp->SetByteSize ( load_cmd.vmsize );
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else if (load_cmd.cmd == LoadCommandDynamicSymtabInfo)
|
|
{
|
|
m_dysymtab.cmd = load_cmd.cmd;
|
|
m_dysymtab.cmdsize = load_cmd.cmdsize;
|
|
m_data.GetU32 (&offset, &m_dysymtab.ilocalsym, (sizeof(m_dysymtab) / sizeof(uint32_t)) - 2);
|
|
}
|
|
|
|
offset = load_cmd_offset + load_cmd.cmdsize;
|
|
}
|
|
// if (dump_sections)
|
|
// {
|
|
// StreamFile s(stdout);
|
|
// m_sections_ap->Dump(&s, true);
|
|
// }
|
|
return sectID; // Return the number of sections we registered with the module
|
|
}
|
|
|
|
class MachSymtabSectionInfo
|
|
{
|
|
public:
|
|
|
|
MachSymtabSectionInfo (SectionList *section_list) :
|
|
m_section_list (section_list),
|
|
m_section_infos()
|
|
{
|
|
// Get the number of sections down to a depth of 1 to include
|
|
// all segments and their sections, but no other sections that
|
|
// may be added for debug map or
|
|
m_section_infos.resize(section_list->GetNumSections(1));
|
|
}
|
|
|
|
|
|
Section *
|
|
GetSection (uint8_t n_sect, addr_t file_addr)
|
|
{
|
|
if (n_sect == 0)
|
|
return NULL;
|
|
if (n_sect < m_section_infos.size())
|
|
{
|
|
if (m_section_infos[n_sect].section == NULL)
|
|
{
|
|
Section *section = m_section_list->FindSectionByID (n_sect).get();
|
|
m_section_infos[n_sect].section = section;
|
|
if (section != NULL)
|
|
{
|
|
m_section_infos[n_sect].vm_range.SetBaseAddress (section->GetFileAddress());
|
|
m_section_infos[n_sect].vm_range.SetByteSize (section->GetByteSize());
|
|
}
|
|
else
|
|
{
|
|
Host::SystemLog (Host::eSystemLogError, "error: unable to find section for section %u\n", n_sect);
|
|
}
|
|
}
|
|
if (m_section_infos[n_sect].vm_range.Contains(file_addr))
|
|
{
|
|
// Symbol is in section.
|
|
return m_section_infos[n_sect].section;
|
|
}
|
|
else if (m_section_infos[n_sect].vm_range.GetByteSize () == 0 &&
|
|
m_section_infos[n_sect].vm_range.GetBaseAddress() == file_addr)
|
|
{
|
|
// Symbol is in section with zero size, but has the same start
|
|
// address as the section. This can happen with linker symbols
|
|
// (symbols that start with the letter 'l' or 'L'.
|
|
return m_section_infos[n_sect].section;
|
|
}
|
|
}
|
|
return m_section_list->FindSectionContainingFileAddress(file_addr).get();
|
|
}
|
|
|
|
protected:
|
|
struct SectionInfo
|
|
{
|
|
SectionInfo () :
|
|
vm_range(),
|
|
section (NULL)
|
|
{
|
|
}
|
|
|
|
VMRange vm_range;
|
|
Section *section;
|
|
};
|
|
SectionList *m_section_list;
|
|
std::vector<SectionInfo> m_section_infos;
|
|
};
|
|
|
|
|
|
|
|
size_t
|
|
ObjectFileMachO::ParseSymtab (bool minimize)
|
|
{
|
|
Timer scoped_timer(__PRETTY_FUNCTION__,
|
|
"ObjectFileMachO::ParseSymtab () module = %s",
|
|
m_file.GetFilename().AsCString(""));
|
|
struct symtab_command symtab_load_command;
|
|
uint32_t offset = MachHeaderSizeFromMagic(m_header.magic);
|
|
uint32_t i;
|
|
|
|
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_SYMBOLS));
|
|
|
|
for (i=0; i<m_header.ncmds; ++i)
|
|
{
|
|
const uint32_t cmd_offset = offset;
|
|
// Read in the load command and load command size
|
|
if (m_data.GetU32(&offset, &symtab_load_command, 2) == NULL)
|
|
break;
|
|
// Watch for the symbol table load command
|
|
if (symtab_load_command.cmd == LoadCommandSymtab)
|
|
{
|
|
// Read in the rest of the symtab load command
|
|
if (m_data.GetU32(&offset, &symtab_load_command.symoff, 4)) // fill in symoff, nsyms, stroff, strsize fields
|
|
{
|
|
if (symtab_load_command.symoff == 0)
|
|
{
|
|
if (log)
|
|
GetModule()->LogMessage(log.get(), "LC_SYMTAB.symoff == 0");
|
|
return 0;
|
|
}
|
|
|
|
if (symtab_load_command.stroff == 0)
|
|
{
|
|
if (log)
|
|
GetModule()->LogMessage(log.get(), "LC_SYMTAB.stroff == 0");
|
|
return 0;
|
|
}
|
|
|
|
if (symtab_load_command.nsyms == 0)
|
|
{
|
|
if (log)
|
|
GetModule()->LogMessage(log.get(), "LC_SYMTAB.nsyms == 0");
|
|
return 0;
|
|
}
|
|
|
|
if (symtab_load_command.strsize == 0)
|
|
{
|
|
if (log)
|
|
GetModule()->LogMessage(log.get(), "LC_SYMTAB.strsize == 0");
|
|
return 0;
|
|
}
|
|
|
|
Symtab *symtab = m_symtab_ap.get();
|
|
SectionList *section_list = GetSectionList();
|
|
if (section_list == NULL)
|
|
return 0;
|
|
|
|
ProcessSP process_sp (m_process_wp.lock());
|
|
|
|
const size_t addr_byte_size = m_data.GetAddressByteSize();
|
|
bool bit_width_32 = addr_byte_size == 4;
|
|
const size_t nlist_byte_size = bit_width_32 ? sizeof(struct nlist) : sizeof(struct nlist_64);
|
|
|
|
DataExtractor nlist_data (NULL, 0, m_data.GetByteOrder(), m_data.GetAddressByteSize());
|
|
DataExtractor strtab_data (NULL, 0, m_data.GetByteOrder(), m_data.GetAddressByteSize());
|
|
|
|
const addr_t nlist_data_byte_size = symtab_load_command.nsyms * nlist_byte_size;
|
|
const addr_t strtab_data_byte_size = symtab_load_command.strsize;
|
|
if (process_sp)
|
|
{
|
|
Target &target = process_sp->GetTarget();
|
|
SectionSP linkedit_section_sp(section_list->FindSectionByName(GetSegmentNameLINKEDIT()));
|
|
// Reading mach file from memory in a process or core file...
|
|
|
|
if (linkedit_section_sp)
|
|
{
|
|
const addr_t linkedit_load_addr = linkedit_section_sp->GetLoadBaseAddress(&target);
|
|
const addr_t linkedit_file_offset = linkedit_section_sp->GetFileOffset();
|
|
const addr_t symoff_addr = linkedit_load_addr + symtab_load_command.symoff - linkedit_file_offset;
|
|
const addr_t stroff_addr = linkedit_load_addr + symtab_load_command.stroff - linkedit_file_offset;
|
|
DataBufferSP nlist_data_sp (ReadMemory (process_sp, symoff_addr, nlist_data_byte_size));
|
|
DataBufferSP strtab_data_sp (ReadMemory (process_sp, stroff_addr, strtab_data_byte_size));
|
|
nlist_data.SetData (nlist_data_sp, 0, nlist_data_sp->GetByteSize());
|
|
strtab_data.SetData (strtab_data_sp, 0, strtab_data_sp->GetByteSize());
|
|
}
|
|
}
|
|
else
|
|
{
|
|
nlist_data.SetData (m_data,
|
|
symtab_load_command.symoff,
|
|
nlist_data_byte_size);
|
|
strtab_data.SetData (m_data,
|
|
symtab_load_command.stroff,
|
|
strtab_data_byte_size);
|
|
|
|
}
|
|
|
|
if (nlist_data.GetByteSize() == 0)
|
|
{
|
|
if (log)
|
|
GetModule()->LogMessage(log.get(), "failed to read nlist data");
|
|
return 0;
|
|
}
|
|
|
|
|
|
if (strtab_data.GetByteSize() == 0)
|
|
{
|
|
if (log)
|
|
GetModule()->LogMessage(log.get(), "failed to read strtab data");
|
|
return 0;
|
|
}
|
|
|
|
const ConstString &g_segment_name_TEXT = GetSegmentNameTEXT();
|
|
const ConstString &g_segment_name_DATA = GetSegmentNameDATA();
|
|
const ConstString &g_segment_name_OBJC = GetSegmentNameOBJC();
|
|
const ConstString &g_section_name_eh_frame = GetSectionNameEHFrame();
|
|
SectionSP text_section_sp(section_list->FindSectionByName(g_segment_name_TEXT));
|
|
SectionSP data_section_sp(section_list->FindSectionByName(g_segment_name_DATA));
|
|
SectionSP objc_section_sp(section_list->FindSectionByName(g_segment_name_OBJC));
|
|
SectionSP eh_frame_section_sp;
|
|
if (text_section_sp.get())
|
|
eh_frame_section_sp = text_section_sp->GetChildren().FindSectionByName (g_section_name_eh_frame);
|
|
else
|
|
eh_frame_section_sp = section_list->FindSectionByName (g_section_name_eh_frame);
|
|
|
|
uint8_t TEXT_eh_frame_sectID = eh_frame_section_sp.get() ? eh_frame_section_sp->GetID() : NListSectionNoSection;
|
|
|
|
uint32_t nlist_data_offset = 0;
|
|
|
|
uint32_t N_SO_index = UINT32_MAX;
|
|
|
|
MachSymtabSectionInfo section_info (section_list);
|
|
std::vector<uint32_t> N_FUN_indexes;
|
|
std::vector<uint32_t> N_NSYM_indexes;
|
|
std::vector<uint32_t> N_INCL_indexes;
|
|
std::vector<uint32_t> N_BRAC_indexes;
|
|
std::vector<uint32_t> N_COMM_indexes;
|
|
typedef std::map <uint64_t, uint32_t> ValueToSymbolIndexMap;
|
|
typedef std::map <uint32_t, uint32_t> NListIndexToSymbolIndexMap;
|
|
ValueToSymbolIndexMap N_FUN_addr_to_sym_idx;
|
|
ValueToSymbolIndexMap N_STSYM_addr_to_sym_idx;
|
|
// Any symbols that get merged into another will get an entry
|
|
// in this map so we know
|
|
NListIndexToSymbolIndexMap m_nlist_idx_to_sym_idx;
|
|
uint32_t nlist_idx = 0;
|
|
Symbol *symbol_ptr = NULL;
|
|
|
|
uint32_t sym_idx = 0;
|
|
Symbol *sym = symtab->Resize (symtab_load_command.nsyms + m_dysymtab.nindirectsyms);
|
|
uint32_t num_syms = symtab->GetNumSymbols();
|
|
|
|
//symtab->Reserve (symtab_load_command.nsyms + m_dysymtab.nindirectsyms);
|
|
for (nlist_idx = 0; nlist_idx < symtab_load_command.nsyms; ++nlist_idx)
|
|
{
|
|
struct nlist_64 nlist;
|
|
if (!nlist_data.ValidOffsetForDataOfSize(nlist_data_offset, nlist_byte_size))
|
|
break;
|
|
|
|
nlist.n_strx = nlist_data.GetU32_unchecked(&nlist_data_offset);
|
|
nlist.n_type = nlist_data.GetU8_unchecked (&nlist_data_offset);
|
|
nlist.n_sect = nlist_data.GetU8_unchecked (&nlist_data_offset);
|
|
nlist.n_desc = nlist_data.GetU16_unchecked (&nlist_data_offset);
|
|
nlist.n_value = nlist_data.GetAddress_unchecked (&nlist_data_offset);
|
|
|
|
SymbolType type = eSymbolTypeInvalid;
|
|
const char *symbol_name = strtab_data.PeekCStr(nlist.n_strx);
|
|
if (symbol_name == NULL)
|
|
{
|
|
// No symbol should be NULL, even the symbols with no
|
|
// string values should have an offset zero which points
|
|
// to an empty C-string
|
|
Host::SystemLog (Host::eSystemLogError,
|
|
"error: symbol[%u] has invalid string table offset 0x%x in %s/%s, ignoring symbol\n",
|
|
nlist_idx,
|
|
nlist.n_strx,
|
|
m_module->GetFileSpec().GetDirectory().GetCString(),
|
|
m_module->GetFileSpec().GetFilename().GetCString());
|
|
continue;
|
|
}
|
|
const char *symbol_name_non_abi_mangled = NULL;
|
|
|
|
if (symbol_name[0] == '\0')
|
|
symbol_name = NULL;
|
|
Section* symbol_section = NULL;
|
|
bool add_nlist = true;
|
|
bool is_debug = ((nlist.n_type & NlistMaskStab) != 0);
|
|
|
|
assert (sym_idx < num_syms);
|
|
|
|
sym[sym_idx].SetDebug (is_debug);
|
|
|
|
if (is_debug)
|
|
{
|
|
switch (nlist.n_type)
|
|
{
|
|
case StabGlobalSymbol:
|
|
// N_GSYM -- global symbol: name,,NO_SECT,type,0
|
|
// Sometimes the N_GSYM value contains the address.
|
|
|
|
// FIXME: In the .o files, we have a GSYM and a debug symbol for all the ObjC data. They
|
|
// have the same address, but we want to ensure that we always find only the real symbol,
|
|
// 'cause we don't currently correctly attribute the GSYM one to the ObjCClass/Ivar/MetaClass
|
|
// symbol type. This is a temporary hack to make sure the ObjectiveC symbols get treated
|
|
// correctly. To do this right, we should coalesce all the GSYM & global symbols that have the
|
|
// same address.
|
|
|
|
if (symbol_name && symbol_name[0] == '_' && symbol_name[1] == 'O'
|
|
&& (strncmp (symbol_name, "_OBJC_IVAR_$_", strlen ("_OBJC_IVAR_$_")) == 0
|
|
|| strncmp (symbol_name, "_OBJC_CLASS_$_", strlen ("_OBJC_CLASS_$_")) == 0
|
|
|| strncmp (symbol_name, "_OBJC_METACLASS_$_", strlen ("_OBJC_METACLASS_$_")) == 0))
|
|
add_nlist = false;
|
|
else
|
|
{
|
|
sym[sym_idx].SetExternal(true);
|
|
if (nlist.n_value != 0)
|
|
symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
|
|
type = eSymbolTypeData;
|
|
}
|
|
break;
|
|
|
|
case StabFunctionName:
|
|
// N_FNAME -- procedure name (f77 kludge): name,,NO_SECT,0,0
|
|
type = eSymbolTypeCompiler;
|
|
break;
|
|
|
|
case StabFunction:
|
|
// N_FUN -- procedure: name,,n_sect,linenumber,address
|
|
if (symbol_name)
|
|
{
|
|
type = eSymbolTypeCode;
|
|
symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
|
|
|
|
N_FUN_addr_to_sym_idx[nlist.n_value] = sym_idx;
|
|
// We use the current number of symbols in the symbol table in lieu of
|
|
// using nlist_idx in case we ever start trimming entries out
|
|
N_FUN_indexes.push_back(sym_idx);
|
|
}
|
|
else
|
|
{
|
|
type = eSymbolTypeCompiler;
|
|
|
|
if ( !N_FUN_indexes.empty() )
|
|
{
|
|
// Copy the size of the function into the original STAB entry so we don't have
|
|
// to hunt for it later
|
|
symtab->SymbolAtIndex(N_FUN_indexes.back())->SetByteSize(nlist.n_value);
|
|
N_FUN_indexes.pop_back();
|
|
// We don't really need the end function STAB as it contains the size which
|
|
// we already placed with the original symbol, so don't add it if we want a
|
|
// minimal symbol table
|
|
if (minimize)
|
|
add_nlist = false;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case StabStaticSymbol:
|
|
// N_STSYM -- static symbol: name,,n_sect,type,address
|
|
N_STSYM_addr_to_sym_idx[nlist.n_value] = sym_idx;
|
|
symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
|
|
type = eSymbolTypeData;
|
|
break;
|
|
|
|
case StabLocalCommon:
|
|
// N_LCSYM -- .lcomm symbol: name,,n_sect,type,address
|
|
symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
|
|
type = eSymbolTypeCommonBlock;
|
|
break;
|
|
|
|
case StabBeginSymbol:
|
|
// N_BNSYM
|
|
// We use the current number of symbols in the symbol table in lieu of
|
|
// using nlist_idx in case we ever start trimming entries out
|
|
if (minimize)
|
|
{
|
|
// Skip these if we want minimal symbol tables
|
|
add_nlist = false;
|
|
}
|
|
else
|
|
{
|
|
symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
|
|
N_NSYM_indexes.push_back(sym_idx);
|
|
type = eSymbolTypeScopeBegin;
|
|
}
|
|
break;
|
|
|
|
case StabEndSymbol:
|
|
// N_ENSYM
|
|
// Set the size of the N_BNSYM to the terminating index of this N_ENSYM
|
|
// so that we can always skip the entire symbol if we need to navigate
|
|
// more quickly at the source level when parsing STABS
|
|
if (minimize)
|
|
{
|
|
// Skip these if we want minimal symbol tables
|
|
add_nlist = false;
|
|
}
|
|
else
|
|
{
|
|
if ( !N_NSYM_indexes.empty() )
|
|
{
|
|
symbol_ptr = symtab->SymbolAtIndex(N_NSYM_indexes.back());
|
|
symbol_ptr->SetByteSize(sym_idx + 1);
|
|
symbol_ptr->SetSizeIsSibling(true);
|
|
N_NSYM_indexes.pop_back();
|
|
}
|
|
type = eSymbolTypeScopeEnd;
|
|
}
|
|
break;
|
|
|
|
|
|
case StabSourceFileOptions:
|
|
// N_OPT - emitted with gcc2_compiled and in gcc source
|
|
type = eSymbolTypeCompiler;
|
|
break;
|
|
|
|
case StabRegisterSymbol:
|
|
// N_RSYM - register sym: name,,NO_SECT,type,register
|
|
type = eSymbolTypeVariable;
|
|
break;
|
|
|
|
case StabSourceLine:
|
|
// N_SLINE - src line: 0,,n_sect,linenumber,address
|
|
symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
|
|
type = eSymbolTypeLineEntry;
|
|
break;
|
|
|
|
case StabStructureType:
|
|
// N_SSYM - structure elt: name,,NO_SECT,type,struct_offset
|
|
type = eSymbolTypeVariableType;
|
|
break;
|
|
|
|
case StabSourceFileName:
|
|
// N_SO - source file name
|
|
type = eSymbolTypeSourceFile;
|
|
if (symbol_name == NULL)
|
|
{
|
|
if (minimize)
|
|
add_nlist = false;
|
|
if (N_SO_index != UINT32_MAX)
|
|
{
|
|
// Set the size of the N_SO to the terminating index of this N_SO
|
|
// so that we can always skip the entire N_SO if we need to navigate
|
|
// more quickly at the source level when parsing STABS
|
|
symbol_ptr = symtab->SymbolAtIndex(N_SO_index);
|
|
symbol_ptr->SetByteSize(sym_idx + (minimize ? 0 : 1));
|
|
symbol_ptr->SetSizeIsSibling(true);
|
|
}
|
|
N_NSYM_indexes.clear();
|
|
N_INCL_indexes.clear();
|
|
N_BRAC_indexes.clear();
|
|
N_COMM_indexes.clear();
|
|
N_FUN_indexes.clear();
|
|
N_SO_index = UINT32_MAX;
|
|
}
|
|
else
|
|
{
|
|
// We use the current number of symbols in the symbol table in lieu of
|
|
// using nlist_idx in case we ever start trimming entries out
|
|
if (symbol_name[0] == '/')
|
|
N_SO_index = sym_idx;
|
|
else if (minimize && (N_SO_index == sym_idx - 1) && ((sym_idx - 1) < num_syms))
|
|
{
|
|
const char *so_path = sym[sym_idx - 1].GetMangled().GetDemangledName().AsCString();
|
|
if (so_path && so_path[0])
|
|
{
|
|
std::string full_so_path (so_path);
|
|
if (*full_so_path.rbegin() != '/')
|
|
full_so_path += '/';
|
|
full_so_path += symbol_name;
|
|
sym[sym_idx - 1].GetMangled().SetValue(full_so_path.c_str(), false);
|
|
add_nlist = false;
|
|
m_nlist_idx_to_sym_idx[nlist_idx] = sym_idx - 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
case StabObjectFileName:
|
|
// N_OSO - object file name: name,,0,0,st_mtime
|
|
type = eSymbolTypeObjectFile;
|
|
break;
|
|
|
|
case StabLocalSymbol:
|
|
// N_LSYM - local sym: name,,NO_SECT,type,offset
|
|
type = eSymbolTypeLocal;
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// INCL scopes
|
|
//----------------------------------------------------------------------
|
|
case StabBeginIncludeFileName:
|
|
// N_BINCL - include file beginning: name,,NO_SECT,0,sum
|
|
// We use the current number of symbols in the symbol table in lieu of
|
|
// using nlist_idx in case we ever start trimming entries out
|
|
N_INCL_indexes.push_back(sym_idx);
|
|
type = eSymbolTypeScopeBegin;
|
|
break;
|
|
|
|
case StabEndIncludeFile:
|
|
// N_EINCL - include file end: name,,NO_SECT,0,0
|
|
// Set the size of the N_BINCL to the terminating index of this N_EINCL
|
|
// so that we can always skip the entire symbol if we need to navigate
|
|
// more quickly at the source level when parsing STABS
|
|
if ( !N_INCL_indexes.empty() )
|
|
{
|
|
symbol_ptr = symtab->SymbolAtIndex(N_INCL_indexes.back());
|
|
symbol_ptr->SetByteSize(sym_idx + 1);
|
|
symbol_ptr->SetSizeIsSibling(true);
|
|
N_INCL_indexes.pop_back();
|
|
}
|
|
type = eSymbolTypeScopeEnd;
|
|
break;
|
|
|
|
case StabIncludeFileName:
|
|
// N_SOL - #included file name: name,,n_sect,0,address
|
|
type = eSymbolTypeHeaderFile;
|
|
|
|
// We currently don't use the header files on darwin
|
|
if (minimize)
|
|
add_nlist = false;
|
|
break;
|
|
|
|
case StabCompilerParameters:
|
|
// N_PARAMS - compiler parameters: name,,NO_SECT,0,0
|
|
type = eSymbolTypeCompiler;
|
|
break;
|
|
|
|
case StabCompilerVersion:
|
|
// N_VERSION - compiler version: name,,NO_SECT,0,0
|
|
type = eSymbolTypeCompiler;
|
|
break;
|
|
|
|
case StabCompilerOptLevel:
|
|
// N_OLEVEL - compiler -O level: name,,NO_SECT,0,0
|
|
type = eSymbolTypeCompiler;
|
|
break;
|
|
|
|
case StabParameter:
|
|
// N_PSYM - parameter: name,,NO_SECT,type,offset
|
|
type = eSymbolTypeVariable;
|
|
break;
|
|
|
|
case StabAlternateEntry:
|
|
// N_ENTRY - alternate entry: name,,n_sect,linenumber,address
|
|
symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
|
|
type = eSymbolTypeLineEntry;
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// Left and Right Braces
|
|
//----------------------------------------------------------------------
|
|
case StabLeftBracket:
|
|
// N_LBRAC - left bracket: 0,,NO_SECT,nesting level,address
|
|
// We use the current number of symbols in the symbol table in lieu of
|
|
// using nlist_idx in case we ever start trimming entries out
|
|
symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
|
|
N_BRAC_indexes.push_back(sym_idx);
|
|
type = eSymbolTypeScopeBegin;
|
|
break;
|
|
|
|
case StabRightBracket:
|
|
// N_RBRAC - right bracket: 0,,NO_SECT,nesting level,address
|
|
// Set the size of the N_LBRAC to the terminating index of this N_RBRAC
|
|
// so that we can always skip the entire symbol if we need to navigate
|
|
// more quickly at the source level when parsing STABS
|
|
symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
|
|
if ( !N_BRAC_indexes.empty() )
|
|
{
|
|
symbol_ptr = symtab->SymbolAtIndex(N_BRAC_indexes.back());
|
|
symbol_ptr->SetByteSize(sym_idx + 1);
|
|
symbol_ptr->SetSizeIsSibling(true);
|
|
N_BRAC_indexes.pop_back();
|
|
}
|
|
type = eSymbolTypeScopeEnd;
|
|
break;
|
|
|
|
case StabDeletedIncludeFile:
|
|
// N_EXCL - deleted include file: name,,NO_SECT,0,sum
|
|
type = eSymbolTypeHeaderFile;
|
|
break;
|
|
|
|
//----------------------------------------------------------------------
|
|
// COMM scopes
|
|
//----------------------------------------------------------------------
|
|
case StabBeginCommon:
|
|
// N_BCOMM - begin common: name,,NO_SECT,0,0
|
|
// We use the current number of symbols in the symbol table in lieu of
|
|
// using nlist_idx in case we ever start trimming entries out
|
|
type = eSymbolTypeScopeBegin;
|
|
N_COMM_indexes.push_back(sym_idx);
|
|
break;
|
|
|
|
case StabEndCommonLocal:
|
|
// N_ECOML - end common (local name): 0,,n_sect,0,address
|
|
symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
|
|
// Fall through
|
|
|
|
case StabEndCommon:
|
|
// N_ECOMM - end common: name,,n_sect,0,0
|
|
// Set the size of the N_BCOMM to the terminating index of this N_ECOMM/N_ECOML
|
|
// so that we can always skip the entire symbol if we need to navigate
|
|
// more quickly at the source level when parsing STABS
|
|
if ( !N_COMM_indexes.empty() )
|
|
{
|
|
symbol_ptr = symtab->SymbolAtIndex(N_COMM_indexes.back());
|
|
symbol_ptr->SetByteSize(sym_idx + 1);
|
|
symbol_ptr->SetSizeIsSibling(true);
|
|
N_COMM_indexes.pop_back();
|
|
}
|
|
type = eSymbolTypeScopeEnd;
|
|
break;
|
|
|
|
case StabLength:
|
|
// N_LENG - second stab entry with length information
|
|
type = eSymbolTypeAdditional;
|
|
break;
|
|
|
|
default: break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
//uint8_t n_pext = NlistMaskPrivateExternal & nlist.n_type;
|
|
uint8_t n_type = NlistMaskType & nlist.n_type;
|
|
sym[sym_idx].SetExternal((NlistMaskExternal & nlist.n_type) != 0);
|
|
|
|
switch (n_type)
|
|
{
|
|
case NListTypeIndirect: // N_INDR - Fall through
|
|
case NListTypePreboundUndefined:// N_PBUD - Fall through
|
|
case NListTypeUndefined: // N_UNDF
|
|
type = eSymbolTypeUndefined;
|
|
break;
|
|
|
|
case NListTypeAbsolute: // N_ABS
|
|
type = eSymbolTypeAbsolute;
|
|
break;
|
|
|
|
case NListTypeSection: // N_SECT
|
|
symbol_section = section_info.GetSection (nlist.n_sect, nlist.n_value);
|
|
|
|
if (symbol_section == NULL)
|
|
{
|
|
// TODO: warn about this?
|
|
add_nlist = false;
|
|
break;
|
|
}
|
|
|
|
if (TEXT_eh_frame_sectID == nlist.n_sect)
|
|
{
|
|
type = eSymbolTypeException;
|
|
}
|
|
else
|
|
{
|
|
uint32_t section_type = symbol_section->Get() & SectionFlagMaskSectionType;
|
|
|
|
switch (section_type)
|
|
{
|
|
case SectionTypeRegular: break; // regular section
|
|
//case SectionTypeZeroFill: type = eSymbolTypeData; break; // zero fill on demand section
|
|
case SectionTypeCStringLiterals: type = eSymbolTypeData; break; // section with only literal C strings
|
|
case SectionType4ByteLiterals: type = eSymbolTypeData; break; // section with only 4 byte literals
|
|
case SectionType8ByteLiterals: type = eSymbolTypeData; break; // section with only 8 byte literals
|
|
case SectionTypeLiteralPointers: type = eSymbolTypeTrampoline; break; // section with only pointers to literals
|
|
case SectionTypeNonLazySymbolPointers: type = eSymbolTypeTrampoline; break; // section with only non-lazy symbol pointers
|
|
case SectionTypeLazySymbolPointers: type = eSymbolTypeTrampoline; break; // section with only lazy symbol pointers
|
|
case SectionTypeSymbolStubs: type = eSymbolTypeTrampoline; break; // section with only symbol stubs, byte size of stub in the reserved2 field
|
|
case SectionTypeModuleInitFunctionPointers: type = eSymbolTypeCode; break; // section with only function pointers for initialization
|
|
case SectionTypeModuleTermFunctionPointers: type = eSymbolTypeCode; break; // section with only function pointers for termination
|
|
//case SectionTypeCoalesced: type = eSymbolType; break; // section contains symbols that are to be coalesced
|
|
//case SectionTypeZeroFillLarge: type = eSymbolTypeData; break; // zero fill on demand section (that can be larger than 4 gigabytes)
|
|
case SectionTypeInterposing: type = eSymbolTypeTrampoline; break; // section with only pairs of function pointers for interposing
|
|
case SectionType16ByteLiterals: type = eSymbolTypeData; break; // section with only 16 byte literals
|
|
case SectionTypeDTraceObjectFormat: type = eSymbolTypeInstrumentation; break;
|
|
case SectionTypeLazyDylibSymbolPointers: type = eSymbolTypeTrampoline; break;
|
|
default: break;
|
|
}
|
|
|
|
if (type == eSymbolTypeInvalid)
|
|
{
|
|
const char *symbol_sect_name = symbol_section->GetName().AsCString();
|
|
if (symbol_section->IsDescendant (text_section_sp.get()))
|
|
{
|
|
if (symbol_section->IsClear(SectionAttrUserPureInstructions |
|
|
SectionAttrUserSelfModifyingCode |
|
|
SectionAttrSytemSomeInstructions))
|
|
type = eSymbolTypeData;
|
|
else
|
|
type = eSymbolTypeCode;
|
|
}
|
|
else
|
|
if (symbol_section->IsDescendant(data_section_sp.get()))
|
|
{
|
|
if (symbol_sect_name && ::strstr (symbol_sect_name, "__objc") == symbol_sect_name)
|
|
{
|
|
type = eSymbolTypeRuntime;
|
|
|
|
if (symbol_name &&
|
|
symbol_name[0] == '_' &&
|
|
symbol_name[1] == 'O' &&
|
|
symbol_name[2] == 'B')
|
|
{
|
|
llvm::StringRef symbol_name_ref(symbol_name);
|
|
static const llvm::StringRef g_objc_v2_prefix_class ("_OBJC_CLASS_$_");
|
|
static const llvm::StringRef g_objc_v2_prefix_metaclass ("_OBJC_METACLASS_$_");
|
|
static const llvm::StringRef g_objc_v2_prefix_ivar ("_OBJC_IVAR_$_");
|
|
if (symbol_name_ref.startswith(g_objc_v2_prefix_class))
|
|
{
|
|
symbol_name_non_abi_mangled = symbol_name + 1;
|
|
symbol_name = symbol_name + g_objc_v2_prefix_class.size();
|
|
type = eSymbolTypeObjCClass;
|
|
}
|
|
else if (symbol_name_ref.startswith(g_objc_v2_prefix_metaclass))
|
|
{
|
|
symbol_name_non_abi_mangled = symbol_name + 1;
|
|
symbol_name = symbol_name + g_objc_v2_prefix_metaclass.size();
|
|
type = eSymbolTypeObjCMetaClass;
|
|
}
|
|
else if (symbol_name_ref.startswith(g_objc_v2_prefix_ivar))
|
|
{
|
|
symbol_name_non_abi_mangled = symbol_name + 1;
|
|
symbol_name = symbol_name + g_objc_v2_prefix_ivar.size();
|
|
type = eSymbolTypeObjCIVar;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
if (symbol_sect_name && ::strstr (symbol_sect_name, "__gcc_except_tab") == symbol_sect_name)
|
|
{
|
|
type = eSymbolTypeException;
|
|
}
|
|
else
|
|
{
|
|
type = eSymbolTypeData;
|
|
}
|
|
}
|
|
else
|
|
if (symbol_sect_name && ::strstr (symbol_sect_name, "__IMPORT") == symbol_sect_name)
|
|
{
|
|
type = eSymbolTypeTrampoline;
|
|
}
|
|
else
|
|
if (symbol_section->IsDescendant(objc_section_sp.get()))
|
|
{
|
|
type = eSymbolTypeRuntime;
|
|
if (symbol_name && symbol_name[0] == '.')
|
|
{
|
|
llvm::StringRef symbol_name_ref(symbol_name);
|
|
static const llvm::StringRef g_objc_v1_prefix_class (".objc_class_name_");
|
|
if (symbol_name_ref.startswith(g_objc_v1_prefix_class))
|
|
{
|
|
symbol_name_non_abi_mangled = symbol_name;
|
|
symbol_name = symbol_name + g_objc_v1_prefix_class.size();
|
|
type = eSymbolTypeObjCClass;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (add_nlist)
|
|
{
|
|
uint64_t symbol_value = nlist.n_value;
|
|
bool symbol_name_is_mangled = false;
|
|
|
|
if (symbol_name_non_abi_mangled)
|
|
{
|
|
sym[sym_idx].GetMangled().SetMangledName (symbol_name_non_abi_mangled);
|
|
sym[sym_idx].GetMangled().SetDemangledName (symbol_name);
|
|
}
|
|
else
|
|
{
|
|
if (symbol_name && symbol_name[0] == '_')
|
|
{
|
|
symbol_name_is_mangled = symbol_name[1] == '_';
|
|
symbol_name++; // Skip the leading underscore
|
|
}
|
|
|
|
if (symbol_name)
|
|
{
|
|
sym[sym_idx].GetMangled().SetValue(symbol_name, symbol_name_is_mangled);
|
|
}
|
|
}
|
|
|
|
if (is_debug == false)
|
|
{
|
|
if (type == eSymbolTypeCode)
|
|
{
|
|
// See if we can find a N_FUN entry for any code symbols.
|
|
// If we do find a match, and the name matches, then we
|
|
// can merge the two into just the function symbol to avoid
|
|
// duplicate entries in the symbol table
|
|
ValueToSymbolIndexMap::const_iterator pos = N_FUN_addr_to_sym_idx.find (nlist.n_value);
|
|
if (pos != N_FUN_addr_to_sym_idx.end())
|
|
{
|
|
if ((symbol_name_is_mangled == true && sym[sym_idx].GetMangled().GetMangledName() == sym[pos->second].GetMangled().GetMangledName()) ||
|
|
(symbol_name_is_mangled == false && sym[sym_idx].GetMangled().GetDemangledName() == sym[pos->second].GetMangled().GetDemangledName()))
|
|
{
|
|
m_nlist_idx_to_sym_idx[nlist_idx] = pos->second;
|
|
// We just need the flags from the linker symbol, so put these flags
|
|
// into the N_FUN flags to avoid duplicate symbols in the symbol table
|
|
sym[pos->second].SetFlags (nlist.n_type << 16 | nlist.n_desc);
|
|
sym[sym_idx].Clear();
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
else if (type == eSymbolTypeData)
|
|
{
|
|
// See if we can find a N_STSYM entry for any data symbols.
|
|
// If we do find a match, and the name matches, then we
|
|
// can merge the two into just the Static symbol to avoid
|
|
// duplicate entries in the symbol table
|
|
ValueToSymbolIndexMap::const_iterator pos = N_STSYM_addr_to_sym_idx.find (nlist.n_value);
|
|
if (pos != N_STSYM_addr_to_sym_idx.end())
|
|
{
|
|
if ((symbol_name_is_mangled == true && sym[sym_idx].GetMangled().GetMangledName() == sym[pos->second].GetMangled().GetMangledName()) ||
|
|
(symbol_name_is_mangled == false && sym[sym_idx].GetMangled().GetDemangledName() == sym[pos->second].GetMangled().GetDemangledName()))
|
|
{
|
|
m_nlist_idx_to_sym_idx[nlist_idx] = pos->second;
|
|
// We just need the flags from the linker symbol, so put these flags
|
|
// into the N_STSYM flags to avoid duplicate symbols in the symbol table
|
|
sym[pos->second].SetFlags (nlist.n_type << 16 | nlist.n_desc);
|
|
sym[sym_idx].Clear();
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (symbol_section != NULL)
|
|
symbol_value -= symbol_section->GetFileAddress();
|
|
|
|
sym[sym_idx].SetID (nlist_idx);
|
|
sym[sym_idx].SetType (type);
|
|
sym[sym_idx].GetAddressRangeRef().GetBaseAddress().SetSection (symbol_section);
|
|
sym[sym_idx].GetAddressRangeRef().GetBaseAddress().SetOffset (symbol_value);
|
|
sym[sym_idx].SetFlags (nlist.n_type << 16 | nlist.n_desc);
|
|
|
|
++sym_idx;
|
|
}
|
|
else
|
|
{
|
|
sym[sym_idx].Clear();
|
|
}
|
|
|
|
}
|
|
|
|
// STAB N_GSYM entries end up having a symbol type eSymbolTypeGlobal and when the symbol value
|
|
// is zero, the address of the global ends up being in a non-STAB entry. Try and fix up all
|
|
// such entries by figuring out what the address for the global is by looking up this non-STAB
|
|
// entry and copying the value into the debug symbol's value to save us the hassle in the
|
|
// debug symbol parser.
|
|
|
|
Symbol *global_symbol = NULL;
|
|
for (nlist_idx = 0;
|
|
nlist_idx < symtab_load_command.nsyms && (global_symbol = symtab->FindSymbolWithType (eSymbolTypeData, Symtab::eDebugYes, Symtab::eVisibilityAny, nlist_idx)) != NULL;
|
|
nlist_idx++)
|
|
{
|
|
if (global_symbol->GetValue().GetFileAddress() == 0)
|
|
{
|
|
std::vector<uint32_t> indexes;
|
|
if (symtab->AppendSymbolIndexesWithName (global_symbol->GetMangled().GetName(), indexes) > 0)
|
|
{
|
|
std::vector<uint32_t>::const_iterator pos;
|
|
std::vector<uint32_t>::const_iterator end = indexes.end();
|
|
for (pos = indexes.begin(); pos != end; ++pos)
|
|
{
|
|
symbol_ptr = symtab->SymbolAtIndex(*pos);
|
|
if (symbol_ptr != global_symbol && symbol_ptr->IsDebug() == false)
|
|
{
|
|
global_symbol->SetValue(symbol_ptr->GetValue());
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Trim our symbols down to just what we ended up with after
|
|
// removing any symbols.
|
|
if (sym_idx < num_syms)
|
|
{
|
|
num_syms = sym_idx;
|
|
sym = symtab->Resize (num_syms);
|
|
}
|
|
|
|
// Now synthesize indirect symbols
|
|
if (m_dysymtab.nindirectsyms != 0)
|
|
{
|
|
DataExtractor indirect_symbol_index_data (m_data, m_dysymtab.indirectsymoff, m_dysymtab.nindirectsyms * 4);
|
|
|
|
if (indirect_symbol_index_data.GetByteSize())
|
|
{
|
|
NListIndexToSymbolIndexMap::const_iterator end_index_pos = m_nlist_idx_to_sym_idx.end();
|
|
|
|
for (uint32_t sect_idx = 1; sect_idx < m_mach_sections.size(); ++sect_idx)
|
|
{
|
|
if ((m_mach_sections[sect_idx].flags & SectionFlagMaskSectionType) == SectionTypeSymbolStubs)
|
|
{
|
|
uint32_t symbol_stub_byte_size = m_mach_sections[sect_idx].reserved2;
|
|
if (symbol_stub_byte_size == 0)
|
|
continue;
|
|
|
|
const uint32_t num_symbol_stubs = m_mach_sections[sect_idx].size / symbol_stub_byte_size;
|
|
|
|
if (num_symbol_stubs == 0)
|
|
continue;
|
|
|
|
const uint32_t symbol_stub_index_offset = m_mach_sections[sect_idx].reserved1;
|
|
uint32_t synthetic_stub_sym_id = symtab_load_command.nsyms;
|
|
for (uint32_t stub_idx = 0; stub_idx < num_symbol_stubs; ++stub_idx)
|
|
{
|
|
const uint32_t symbol_stub_index = symbol_stub_index_offset + stub_idx;
|
|
const lldb::addr_t symbol_stub_addr = m_mach_sections[sect_idx].addr + (stub_idx * symbol_stub_byte_size);
|
|
uint32_t symbol_stub_offset = symbol_stub_index * 4;
|
|
if (indirect_symbol_index_data.ValidOffsetForDataOfSize(symbol_stub_offset, 4))
|
|
{
|
|
const uint32_t stub_sym_id = indirect_symbol_index_data.GetU32 (&symbol_stub_offset);
|
|
if (stub_sym_id & (IndirectSymbolAbsolute | IndirectSymbolLocal))
|
|
continue;
|
|
|
|
NListIndexToSymbolIndexMap::const_iterator index_pos = m_nlist_idx_to_sym_idx.find (stub_sym_id);
|
|
Symbol *stub_symbol = NULL;
|
|
if (index_pos != end_index_pos)
|
|
{
|
|
// We have a remapping from the original nlist index to
|
|
// a current symbol index, so just look this up by index
|
|
stub_symbol = symtab->SymbolAtIndex (index_pos->second);
|
|
}
|
|
else
|
|
{
|
|
// We need to lookup a symbol using the original nlist
|
|
// symbol index since this index is coming from the
|
|
// S_SYMBOL_STUBS
|
|
stub_symbol = symtab->FindSymbolByID (stub_sym_id);
|
|
}
|
|
|
|
assert (stub_symbol);
|
|
if (stub_symbol)
|
|
{
|
|
Address so_addr(symbol_stub_addr, section_list);
|
|
|
|
if (stub_symbol->GetType() == eSymbolTypeUndefined)
|
|
{
|
|
// Change the external symbol into a trampoline that makes sense
|
|
// These symbols were N_UNDF N_EXT, and are useless to us, so we
|
|
// can re-use them so we don't have to make up a synthetic symbol
|
|
// for no good reason.
|
|
stub_symbol->SetType (eSymbolTypeTrampoline);
|
|
stub_symbol->SetExternal (false);
|
|
stub_symbol->GetAddressRangeRef().GetBaseAddress() = so_addr;
|
|
stub_symbol->GetAddressRangeRef().SetByteSize (symbol_stub_byte_size);
|
|
}
|
|
else
|
|
{
|
|
// Make a synthetic symbol to describe the trampoline stub
|
|
if (sym_idx >= num_syms)
|
|
sym = symtab->Resize (++num_syms);
|
|
sym[sym_idx].SetID (synthetic_stub_sym_id++);
|
|
sym[sym_idx].GetMangled() = stub_symbol->GetMangled();
|
|
sym[sym_idx].SetType (eSymbolTypeTrampoline);
|
|
sym[sym_idx].SetIsSynthetic (true);
|
|
sym[sym_idx].GetAddressRangeRef().GetBaseAddress() = so_addr;
|
|
sym[sym_idx].GetAddressRangeRef().SetByteSize (symbol_stub_byte_size);
|
|
++sym_idx;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return symtab->GetNumSymbols();
|
|
}
|
|
}
|
|
offset = cmd_offset + symtab_load_command.cmdsize;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
void
|
|
ObjectFileMachO::Dump (Stream *s)
|
|
{
|
|
lldb_private::Mutex::Locker locker(m_mutex);
|
|
s->Printf("%p: ", this);
|
|
s->Indent();
|
|
if (m_header.magic == HeaderMagic64 || m_header.magic == HeaderMagic64Swapped)
|
|
s->PutCString("ObjectFileMachO64");
|
|
else
|
|
s->PutCString("ObjectFileMachO32");
|
|
|
|
ArchSpec header_arch(eArchTypeMachO, m_header.cputype, m_header.cpusubtype);
|
|
|
|
*s << ", file = '" << m_file << "', arch = " << header_arch.GetArchitectureName() << "\n";
|
|
|
|
if (m_sections_ap.get())
|
|
m_sections_ap->Dump(s, NULL, true, UINT32_MAX);
|
|
|
|
if (m_symtab_ap.get())
|
|
m_symtab_ap->Dump(s, NULL, eSortOrderNone);
|
|
}
|
|
|
|
|
|
bool
|
|
ObjectFileMachO::GetUUID (lldb_private::UUID* uuid)
|
|
{
|
|
lldb_private::Mutex::Locker locker(m_mutex);
|
|
struct uuid_command load_cmd;
|
|
uint32_t offset = MachHeaderSizeFromMagic(m_header.magic);
|
|
uint32_t i;
|
|
for (i=0; i<m_header.ncmds; ++i)
|
|
{
|
|
const uint32_t cmd_offset = offset;
|
|
if (m_data.GetU32(&offset, &load_cmd, 2) == NULL)
|
|
break;
|
|
|
|
if (load_cmd.cmd == LoadCommandUUID)
|
|
{
|
|
const uint8_t *uuid_bytes = m_data.PeekData(offset, 16);
|
|
if (uuid_bytes)
|
|
{
|
|
uuid->SetBytes (uuid_bytes);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
offset = cmd_offset + load_cmd.cmdsize;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
uint32_t
|
|
ObjectFileMachO::GetDependentModules (FileSpecList& files)
|
|
{
|
|
lldb_private::Mutex::Locker locker(m_mutex);
|
|
struct load_command load_cmd;
|
|
uint32_t offset = MachHeaderSizeFromMagic(m_header.magic);
|
|
uint32_t count = 0;
|
|
const bool resolve_path = false; // Don't resolve the dependend file paths since they may not reside on this system
|
|
uint32_t i;
|
|
for (i=0; i<m_header.ncmds; ++i)
|
|
{
|
|
const uint32_t cmd_offset = offset;
|
|
if (m_data.GetU32(&offset, &load_cmd, 2) == NULL)
|
|
break;
|
|
|
|
switch (load_cmd.cmd)
|
|
{
|
|
case LoadCommandDylibLoad:
|
|
case LoadCommandDylibLoadWeak:
|
|
case LoadCommandDylibReexport:
|
|
case LoadCommandDynamicLinkerLoad:
|
|
case LoadCommandFixedVMShlibLoad:
|
|
case LoadCommandDylibLoadUpward:
|
|
{
|
|
uint32_t name_offset = cmd_offset + m_data.GetU32(&offset);
|
|
const char *path = m_data.PeekCStr(name_offset);
|
|
// Skip any path that starts with '@' since these are usually:
|
|
// @executable_path/.../file
|
|
// @rpath/.../file
|
|
if (path && path[0] != '@')
|
|
{
|
|
FileSpec file_spec(path, resolve_path);
|
|
if (files.AppendIfUnique(file_spec))
|
|
count++;
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
offset = cmd_offset + load_cmd.cmdsize;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
lldb_private::Address
|
|
ObjectFileMachO::GetEntryPointAddress ()
|
|
{
|
|
// If the object file is not an executable it can't hold the entry point. m_entry_point_address
|
|
// is initialized to an invalid address, so we can just return that.
|
|
// If m_entry_point_address is valid it means we've found it already, so return the cached value.
|
|
|
|
if (!IsExecutable() || m_entry_point_address.IsValid())
|
|
return m_entry_point_address;
|
|
|
|
// Otherwise, look for the UnixThread or Thread command. The data for the Thread command is given in
|
|
// /usr/include/mach-o.h, but it is basically:
|
|
//
|
|
// uint32_t flavor - this is the flavor argument you would pass to thread_get_state
|
|
// uint32_t count - this is the count of longs in the thread state data
|
|
// struct XXX_thread_state state - this is the structure from <machine/thread_status.h> corresponding to the flavor.
|
|
// <repeat this trio>
|
|
//
|
|
// So we just keep reading the various register flavors till we find the GPR one, then read the PC out of there.
|
|
// FIXME: We will need to have a "RegisterContext data provider" class at some point that can get all the registers
|
|
// out of data in this form & attach them to a given thread. That should underlie the MacOS X User process plugin,
|
|
// and we'll also need it for the MacOS X Core File process plugin. When we have that we can also use it here.
|
|
//
|
|
// For now we hard-code the offsets and flavors we need:
|
|
//
|
|
//
|
|
|
|
lldb_private::Mutex::Locker locker(m_mutex);
|
|
struct load_command load_cmd;
|
|
uint32_t offset = MachHeaderSizeFromMagic(m_header.magic);
|
|
uint32_t i;
|
|
lldb::addr_t start_address = LLDB_INVALID_ADDRESS;
|
|
bool done = false;
|
|
|
|
for (i=0; i<m_header.ncmds; ++i)
|
|
{
|
|
const uint32_t cmd_offset = offset;
|
|
if (m_data.GetU32(&offset, &load_cmd, 2) == NULL)
|
|
break;
|
|
|
|
switch (load_cmd.cmd)
|
|
{
|
|
case LoadCommandUnixThread:
|
|
case LoadCommandThread:
|
|
{
|
|
while (offset < cmd_offset + load_cmd.cmdsize)
|
|
{
|
|
uint32_t flavor = m_data.GetU32(&offset);
|
|
uint32_t count = m_data.GetU32(&offset);
|
|
if (count == 0)
|
|
{
|
|
// We've gotten off somehow, log and exit;
|
|
return m_entry_point_address;
|
|
}
|
|
|
|
switch (m_header.cputype)
|
|
{
|
|
case llvm::MachO::CPUTypeARM:
|
|
if (flavor == 1) // ARM_THREAD_STATE from mach/arm/thread_status.h
|
|
{
|
|
offset += 60; // This is the offset of pc in the GPR thread state data structure.
|
|
start_address = m_data.GetU32(&offset);
|
|
done = true;
|
|
}
|
|
break;
|
|
case llvm::MachO::CPUTypeI386:
|
|
if (flavor == 1) // x86_THREAD_STATE32 from mach/i386/thread_status.h
|
|
{
|
|
offset += 40; // This is the offset of eip in the GPR thread state data structure.
|
|
start_address = m_data.GetU32(&offset);
|
|
done = true;
|
|
}
|
|
break;
|
|
case llvm::MachO::CPUTypeX86_64:
|
|
if (flavor == 4) // x86_THREAD_STATE64 from mach/i386/thread_status.h
|
|
{
|
|
offset += 16 * 8; // This is the offset of rip in the GPR thread state data structure.
|
|
start_address = m_data.GetU64(&offset);
|
|
done = true;
|
|
}
|
|
break;
|
|
default:
|
|
return m_entry_point_address;
|
|
}
|
|
// Haven't found the GPR flavor yet, skip over the data for this flavor:
|
|
if (done)
|
|
break;
|
|
offset += count * 4;
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
if (done)
|
|
break;
|
|
|
|
// Go to the next load command:
|
|
offset = cmd_offset + load_cmd.cmdsize;
|
|
}
|
|
|
|
if (start_address != LLDB_INVALID_ADDRESS)
|
|
{
|
|
// We got the start address from the load commands, so now resolve that address in the sections
|
|
// of this ObjectFile:
|
|
if (!m_entry_point_address.ResolveAddressUsingFileSections (start_address, GetSectionList()))
|
|
{
|
|
m_entry_point_address.Clear();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// We couldn't read the UnixThread load command - maybe it wasn't there. As a fallback look for the
|
|
// "start" symbol in the main executable.
|
|
|
|
SymbolContextList contexts;
|
|
SymbolContext context;
|
|
if (!m_module->FindSymbolsWithNameAndType(ConstString ("start"), eSymbolTypeCode, contexts))
|
|
return m_entry_point_address;
|
|
|
|
contexts.GetContextAtIndex(0, context);
|
|
|
|
m_entry_point_address = context.symbol->GetValue();
|
|
}
|
|
|
|
return m_entry_point_address;
|
|
|
|
}
|
|
|
|
lldb_private::Address
|
|
ObjectFileMachO::GetHeaderAddress ()
|
|
{
|
|
lldb_private::Address header_addr;
|
|
SectionList *section_list = GetSectionList();
|
|
if (section_list)
|
|
{
|
|
SectionSP text_segment_sp (section_list->FindSectionByName (GetSegmentNameTEXT()));
|
|
if (text_segment_sp)
|
|
{
|
|
header_addr.SetSection (text_segment_sp.get());
|
|
header_addr.SetOffset (0);
|
|
}
|
|
}
|
|
return header_addr;
|
|
}
|
|
|
|
uint32_t
|
|
ObjectFileMachO::GetNumThreadContexts ()
|
|
{
|
|
lldb_private::Mutex::Locker locker(m_mutex);
|
|
if (!m_thread_context_offsets_valid)
|
|
{
|
|
m_thread_context_offsets_valid = true;
|
|
uint32_t offset = MachHeaderSizeFromMagic(m_header.magic);
|
|
FileRangeArray::Entry file_range;
|
|
thread_command thread_cmd;
|
|
for (uint32_t i=0; i<m_header.ncmds; ++i)
|
|
{
|
|
const uint32_t cmd_offset = offset;
|
|
if (m_data.GetU32(&offset, &thread_cmd, 2) == NULL)
|
|
break;
|
|
|
|
if (thread_cmd.cmd == LoadCommandThread)
|
|
{
|
|
file_range.SetRangeBase (offset);
|
|
file_range.SetByteSize (thread_cmd.cmdsize - 8);
|
|
m_thread_context_offsets.Append (file_range);
|
|
}
|
|
offset = cmd_offset + thread_cmd.cmdsize;
|
|
}
|
|
}
|
|
return m_thread_context_offsets.GetSize();
|
|
}
|
|
|
|
lldb::RegisterContextSP
|
|
ObjectFileMachO::GetThreadContextAtIndex (uint32_t idx, lldb_private::Thread &thread)
|
|
{
|
|
lldb_private::Mutex::Locker locker(m_mutex);
|
|
if (!m_thread_context_offsets_valid)
|
|
GetNumThreadContexts ();
|
|
|
|
lldb::RegisterContextSP reg_ctx_sp;
|
|
const FileRangeArray::Entry *thread_context_file_range = m_thread_context_offsets.GetEntryAtIndex (idx);
|
|
if (thread_context_file_range)
|
|
{
|
|
DataExtractor data (m_data,
|
|
thread_context_file_range->GetRangeBase(),
|
|
thread_context_file_range->GetByteSize());
|
|
reg_ctx_sp.reset (new RegisterContextDarwin_x86_64_Mach (thread, data));
|
|
}
|
|
return reg_ctx_sp;
|
|
}
|
|
|
|
|
|
ObjectFile::Type
|
|
ObjectFileMachO::CalculateType()
|
|
{
|
|
switch (m_header.filetype)
|
|
{
|
|
case HeaderFileTypeObject: // 0x1u MH_OBJECT
|
|
if (GetAddressByteSize () == 4)
|
|
{
|
|
// 32 bit kexts are just object files, but they do have a valid
|
|
// UUID load command.
|
|
UUID uuid;
|
|
if (GetUUID(&uuid))
|
|
{
|
|
// this checking for the UUID load command is not enough
|
|
// we could eventually look for the symbol named
|
|
// "OSKextGetCurrentIdentifier" as this is required of kexts
|
|
if (m_strata == eStrataInvalid)
|
|
m_strata = eStrataKernel;
|
|
return eTypeSharedLibrary;
|
|
}
|
|
}
|
|
return eTypeObjectFile;
|
|
|
|
case HeaderFileTypeExecutable: return eTypeExecutable; // 0x2u MH_EXECUTE
|
|
case HeaderFileTypeFixedVMShlib: return eTypeSharedLibrary; // 0x3u MH_FVMLIB
|
|
case HeaderFileTypeCore: return eTypeCoreFile; // 0x4u MH_CORE
|
|
case HeaderFileTypePreloadedExecutable: return eTypeSharedLibrary; // 0x5u MH_PRELOAD
|
|
case HeaderFileTypeDynamicShlib: return eTypeSharedLibrary; // 0x6u MH_DYLIB
|
|
case HeaderFileTypeDynamicLinkEditor: return eTypeDynamicLinker; // 0x7u MH_DYLINKER
|
|
case HeaderFileTypeBundle: return eTypeSharedLibrary; // 0x8u MH_BUNDLE
|
|
case HeaderFileTypeDynamicShlibStub: return eTypeStubLibrary; // 0x9u MH_DYLIB_STUB
|
|
case HeaderFileTypeDSYM: return eTypeDebugInfo; // 0xAu MH_DSYM
|
|
case HeaderFileTypeKextBundle: return eTypeSharedLibrary; // 0xBu MH_KEXT_BUNDLE
|
|
default:
|
|
break;
|
|
}
|
|
return eTypeUnknown;
|
|
}
|
|
|
|
ObjectFile::Strata
|
|
ObjectFileMachO::CalculateStrata()
|
|
{
|
|
switch (m_header.filetype)
|
|
{
|
|
case HeaderFileTypeObject: // 0x1u MH_OBJECT
|
|
{
|
|
// 32 bit kexts are just object files, but they do have a valid
|
|
// UUID load command.
|
|
UUID uuid;
|
|
if (GetUUID(&uuid))
|
|
{
|
|
// this checking for the UUID load command is not enough
|
|
// we could eventually look for the symbol named
|
|
// "OSKextGetCurrentIdentifier" as this is required of kexts
|
|
if (m_type == eTypeInvalid)
|
|
m_type = eTypeSharedLibrary;
|
|
|
|
return eStrataKernel;
|
|
}
|
|
}
|
|
return eStrataUnknown;
|
|
|
|
case HeaderFileTypeExecutable: // 0x2u MH_EXECUTE
|
|
// Check for the MH_DYLDLINK bit in the flags
|
|
if (m_header.flags & HeaderFlagBitIsDynamicLinkObject)
|
|
{
|
|
return eStrataUser;
|
|
}
|
|
else
|
|
{
|
|
SectionList *section_list = GetSectionList();
|
|
if (section_list)
|
|
{
|
|
static ConstString g_kld_section_name ("__KLD");
|
|
if (section_list->FindSectionByName(g_kld_section_name))
|
|
return eStrataKernel;
|
|
}
|
|
}
|
|
return eStrataRawImage;
|
|
|
|
case HeaderFileTypeFixedVMShlib: return eStrataUser; // 0x3u MH_FVMLIB
|
|
case HeaderFileTypeCore: return eStrataUnknown; // 0x4u MH_CORE
|
|
case HeaderFileTypePreloadedExecutable: return eStrataRawImage; // 0x5u MH_PRELOAD
|
|
case HeaderFileTypeDynamicShlib: return eStrataUser; // 0x6u MH_DYLIB
|
|
case HeaderFileTypeDynamicLinkEditor: return eStrataUser; // 0x7u MH_DYLINKER
|
|
case HeaderFileTypeBundle: return eStrataUser; // 0x8u MH_BUNDLE
|
|
case HeaderFileTypeDynamicShlibStub: return eStrataUser; // 0x9u MH_DYLIB_STUB
|
|
case HeaderFileTypeDSYM: return eStrataUnknown; // 0xAu MH_DSYM
|
|
case HeaderFileTypeKextBundle: return eStrataKernel; // 0xBu MH_KEXT_BUNDLE
|
|
default:
|
|
break;
|
|
}
|
|
return eStrataUnknown;
|
|
}
|
|
|
|
|
|
bool
|
|
ObjectFileMachO::GetArchitecture (ArchSpec &arch)
|
|
{
|
|
lldb_private::Mutex::Locker locker(m_mutex);
|
|
arch.SetArchitecture (eArchTypeMachO, m_header.cputype, m_header.cpusubtype);
|
|
|
|
// Files with type MH_PRELOAD are currently used in cases where the image
|
|
// debugs at the addresses in the file itself. Below we set the OS to
|
|
// unknown to make sure we use the DynamicLoaderStatic()...
|
|
if (m_header.filetype == HeaderFileTypePreloadedExecutable)
|
|
{
|
|
arch.GetTriple().setOS (llvm::Triple::UnknownOS);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------
|
|
// PluginInterface protocol
|
|
//------------------------------------------------------------------
|
|
const char *
|
|
ObjectFileMachO::GetPluginName()
|
|
{
|
|
return "ObjectFileMachO";
|
|
}
|
|
|
|
const char *
|
|
ObjectFileMachO::GetShortPluginName()
|
|
{
|
|
return GetPluginNameStatic();
|
|
}
|
|
|
|
uint32_t
|
|
ObjectFileMachO::GetPluginVersion()
|
|
{
|
|
return 1;
|
|
}
|
|
|