1105 lines
42 KiB
C++
1105 lines
42 KiB
C++
//===-- DynamicLoaderDarwinKernel.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 "lldb/Breakpoint/StoppointCallbackContext.h"
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#include "lldb/Core/DataBuffer.h"
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#include "lldb/Core/DataBufferHeap.h"
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#include "lldb/Core/Debugger.h"
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#include "lldb/Core/Log.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/State.h"
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#include "lldb/Symbol/ObjectFile.h"
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#include "lldb/Target/ObjCLanguageRuntime.h"
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#include "lldb/Target/RegisterContext.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Target/Thread.h"
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#include "lldb/Target/ThreadPlanRunToAddress.h"
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#include "lldb/Target/StackFrame.h"
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#include "DynamicLoaderDarwinKernel.h"
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//#define ENABLE_DEBUG_PRINTF // COMMENT THIS LINE OUT PRIOR TO CHECKIN
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#ifdef ENABLE_DEBUG_PRINTF
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#include <stdio.h>
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#define DEBUG_PRINTF(fmt, ...) printf(fmt, ## __VA_ARGS__)
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#else
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#define DEBUG_PRINTF(fmt, ...)
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#endif
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using namespace lldb;
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using namespace lldb_private;
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/// FIXME - The ObjC Runtime trampoline handler doesn't really belong here.
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/// I am putting it here so I can invoke it in the Trampoline code here, but
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/// it should be moved to the ObjC Runtime support when it is set up.
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//----------------------------------------------------------------------
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// Create an instance of this class. This function is filled into
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// the plugin info class that gets handed out by the plugin factory and
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// allows the lldb to instantiate an instance of this class.
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//----------------------------------------------------------------------
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DynamicLoader *
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DynamicLoaderDarwinKernel::CreateInstance (Process* process, bool force)
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{
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bool create = force;
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if (!create)
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{
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Module* exe_module = process->GetTarget().GetExecutableModulePointer();
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if (exe_module)
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{
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ObjectFile *object_file = exe_module->GetObjectFile();
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if (object_file)
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{
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SectionList *section_list = object_file->GetSectionList();
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if (section_list)
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{
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static ConstString g_kld_section_name ("__KLD");
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if (section_list->FindSectionByName (g_kld_section_name))
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{
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create = true;
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}
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}
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}
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}
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if (create)
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{
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const llvm::Triple &triple_ref = process->GetTarget().GetArchitecture().GetTriple();
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create = triple_ref.getOS() == llvm::Triple::Darwin && triple_ref.getVendor() == llvm::Triple::Apple;
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}
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}
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if (create)
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{
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process->SetCanJIT(false);
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return new DynamicLoaderDarwinKernel (process);
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}
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return NULL;
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}
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//----------------------------------------------------------------------
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// Constructor
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//----------------------------------------------------------------------
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DynamicLoaderDarwinKernel::DynamicLoaderDarwinKernel (Process* process) :
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DynamicLoader(process),
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m_kernel(),
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m_kext_summary_header_ptr_addr (),
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m_kext_summary_header_addr (),
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m_kext_summary_header (),
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m_kext_summaries(),
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m_mutex(Mutex::eMutexTypeRecursive),
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m_break_id (LLDB_INVALID_BREAK_ID)
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{
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}
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//----------------------------------------------------------------------
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// Destructor
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//----------------------------------------------------------------------
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DynamicLoaderDarwinKernel::~DynamicLoaderDarwinKernel()
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{
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Clear(true);
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}
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void
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DynamicLoaderDarwinKernel::UpdateIfNeeded()
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{
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LoadKernelModuleIfNeeded();
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SetNotificationBreakpointIfNeeded ();
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}
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//------------------------------------------------------------------
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/// Called after attaching a process.
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///
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/// Allow DynamicLoader plug-ins to execute some code after
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/// attaching to a process.
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//------------------------------------------------------------------
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void
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DynamicLoaderDarwinKernel::DidAttach ()
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{
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PrivateInitialize(m_process);
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UpdateIfNeeded();
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}
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//------------------------------------------------------------------
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/// Called after attaching a process.
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///
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/// Allow DynamicLoader plug-ins to execute some code after
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/// attaching to a process.
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//------------------------------------------------------------------
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void
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DynamicLoaderDarwinKernel::DidLaunch ()
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{
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PrivateInitialize(m_process);
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UpdateIfNeeded();
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}
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//----------------------------------------------------------------------
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// Clear out the state of this class.
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//----------------------------------------------------------------------
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void
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DynamicLoaderDarwinKernel::Clear (bool clear_process)
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{
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Mutex::Locker locker(m_mutex);
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if (m_process->IsAlive() && LLDB_BREAK_ID_IS_VALID(m_break_id))
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m_process->ClearBreakpointSiteByID(m_break_id);
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if (clear_process)
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m_process = NULL;
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m_kernel.Clear(false);
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m_kext_summary_header_ptr_addr.Clear();
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m_kext_summary_header_addr.Clear();
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m_kext_summaries.clear();
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m_break_id = LLDB_INVALID_BREAK_ID;
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}
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//----------------------------------------------------------------------
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// Load the kernel module and initialize the "m_kernel" member. Return
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// true _only_ if the kernel is loaded the first time through (subsequent
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// calls to this function should return false after the kernel has been
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// already loaded).
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//----------------------------------------------------------------------
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void
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DynamicLoaderDarwinKernel::LoadKernelModuleIfNeeded()
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{
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if (!m_kext_summary_header_ptr_addr.IsValid())
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{
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m_kernel.Clear(false);
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m_kernel.module_sp = m_process->GetTarget().GetExecutableModule();
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if (m_kernel.module_sp)
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{
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static ConstString mach_header_name ("_mh_execute_header");
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static ConstString kext_summary_symbol ("gLoadedKextSummaries");
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const Symbol *symbol = NULL;
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symbol = m_kernel.module_sp->FindFirstSymbolWithNameAndType (kext_summary_symbol, eSymbolTypeData);
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if (symbol)
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m_kext_summary_header_ptr_addr = symbol->GetValue();
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symbol = m_kernel.module_sp->FindFirstSymbolWithNameAndType (mach_header_name, eSymbolTypeAbsolute);
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if (symbol)
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{
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// The "_mh_execute_header" symbol is absolute and not a section based
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// symbol that will have a valid address, so we need to resolve it...
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m_process->GetTarget().GetImages().ResolveFileAddress (symbol->GetValue().GetFileAddress(), m_kernel.so_address);
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DataExtractor data; // Load command data
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if (ReadMachHeader (m_kernel, &data))
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{
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if (m_kernel.header.filetype == llvm::MachO::HeaderFileTypeExecutable)
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{
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if (ParseLoadCommands (data, m_kernel))
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UpdateImageLoadAddress (m_kernel);
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// Update all image infos
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ReadAllKextSummaries ();
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}
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}
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else
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{
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m_kernel.Clear(false);
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}
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}
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}
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}
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}
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bool
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DynamicLoaderDarwinKernel::FindTargetModule (OSKextLoadedKextSummary &image_info, bool can_create, bool *did_create_ptr)
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{
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if (did_create_ptr)
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*did_create_ptr = false;
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const bool image_info_uuid_is_valid = image_info.uuid.IsValid();
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if (image_info.module_sp)
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{
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if (image_info_uuid_is_valid)
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{
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if (image_info.module_sp->GetUUID() == image_info.uuid)
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return true;
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else
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image_info.module_sp.reset();
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}
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else
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return true;
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}
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ModuleList &target_images = m_process->GetTarget().GetImages();
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if (image_info_uuid_is_valid)
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image_info.module_sp = target_images.FindModule(image_info.uuid);
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if (image_info.module_sp)
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return true;
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ArchSpec arch (image_info.GetArchitecture ());
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if (can_create)
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{
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if (image_info_uuid_is_valid)
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{
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image_info.module_sp = m_process->GetTarget().GetSharedModule (FileSpec(),
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arch,
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&image_info.uuid);
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if (did_create_ptr)
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*did_create_ptr = image_info.module_sp;
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}
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}
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return image_info.module_sp;
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}
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bool
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DynamicLoaderDarwinKernel::UpdateCommPageLoadAddress(Module *module)
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{
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bool changed = false;
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if (module)
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{
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ObjectFile *image_object_file = module->GetObjectFile();
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if (image_object_file)
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{
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SectionList *section_list = image_object_file->GetSectionList ();
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if (section_list)
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{
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uint32_t num_sections = section_list->GetSize();
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for (uint32_t i=0; i<num_sections; ++i)
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{
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Section* section = section_list->GetSectionAtIndex (i).get();
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if (section)
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{
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const addr_t new_section_load_addr = section->GetFileAddress ();
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const addr_t old_section_load_addr = m_process->GetTarget().GetSectionLoadList().GetSectionLoadAddress (section);
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if (old_section_load_addr == LLDB_INVALID_ADDRESS ||
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old_section_load_addr != new_section_load_addr)
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{
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if (m_process->GetTarget().GetSectionLoadList().SetSectionLoadAddress (section, section->GetFileAddress ()))
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changed = true;
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}
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}
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}
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}
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}
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}
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return changed;
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}
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//----------------------------------------------------------------------
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// Update the load addresses for all segments in MODULE using the
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// updated INFO that is passed in.
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//----------------------------------------------------------------------
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bool
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DynamicLoaderDarwinKernel::UpdateImageLoadAddress (OSKextLoadedKextSummary& info)
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{
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Module *module = info.module_sp.get();
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bool changed = false;
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if (module)
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{
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ObjectFile *image_object_file = module->GetObjectFile();
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if (image_object_file)
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{
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SectionList *section_list = image_object_file->GetSectionList ();
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if (section_list)
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{
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// We now know the slide amount, so go through all sections
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// and update the load addresses with the correct values.
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uint32_t num_segments = info.segments.size();
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for (uint32_t i=0; i<num_segments; ++i)
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{
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const addr_t new_section_load_addr = info.segments[i].vmaddr;
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if (section_list->FindSectionByName(info.segments[i].name))
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{
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SectionSP section_sp(section_list->FindSectionByName(info.segments[i].name));
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if (section_sp)
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{
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const addr_t old_section_load_addr = m_process->GetTarget().GetSectionLoadList().GetSectionLoadAddress (section_sp.get());
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if (old_section_load_addr == LLDB_INVALID_ADDRESS ||
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old_section_load_addr != new_section_load_addr)
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{
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if (m_process->GetTarget().GetSectionLoadList().SetSectionLoadAddress (section_sp.get(), new_section_load_addr))
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changed = true;
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}
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}
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else
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{
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fprintf (stderr,
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"warning: unable to find and load segment named '%s' at 0x%llx in '%s/%s' in macosx dynamic loader plug-in.\n",
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info.segments[i].name.AsCString("<invalid>"),
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(uint64_t)new_section_load_addr,
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image_object_file->GetFileSpec().GetDirectory().AsCString(),
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image_object_file->GetFileSpec().GetFilename().AsCString());
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}
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}
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else
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{
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// The segment name is empty which means this is a .o file.
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// Object files in LLDB end up getting reorganized so that
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// the segment name that is in the section is promoted into
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// an actual segment, so we just need to go through all sections
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// and slide them by a single amount.
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uint32_t num_sections = section_list->GetSize();
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for (uint32_t i=0; i<num_sections; ++i)
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{
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Section* section = section_list->GetSectionAtIndex (i).get();
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if (section)
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{
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if (m_process->GetTarget().GetSectionLoadList().SetSectionLoadAddress (section, section->GetFileAddress() + new_section_load_addr))
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changed = true;
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}
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}
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}
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}
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}
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}
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}
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return changed;
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}
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//----------------------------------------------------------------------
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// Update the load addresses for all segments in MODULE using the
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// updated INFO that is passed in.
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//----------------------------------------------------------------------
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bool
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DynamicLoaderDarwinKernel::UnloadImageLoadAddress (OSKextLoadedKextSummary& info)
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{
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Module *module = info.module_sp.get();
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bool changed = false;
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if (module)
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{
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ObjectFile *image_object_file = module->GetObjectFile();
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if (image_object_file)
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{
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SectionList *section_list = image_object_file->GetSectionList ();
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if (section_list)
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{
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uint32_t num_segments = info.segments.size();
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for (uint32_t i=0; i<num_segments; ++i)
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{
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SectionSP section_sp(section_list->FindSectionByName(info.segments[i].name));
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if (section_sp)
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{
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const addr_t old_section_load_addr = info.segments[i].vmaddr;
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if (m_process->GetTarget().GetSectionLoadList().SetSectionUnloaded (section_sp.get(), old_section_load_addr))
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changed = true;
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}
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else
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{
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fprintf (stderr,
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"warning: unable to find and unload segment named '%s' in '%s/%s' in macosx dynamic loader plug-in.\n",
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info.segments[i].name.AsCString("<invalid>"),
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image_object_file->GetFileSpec().GetDirectory().AsCString(),
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image_object_file->GetFileSpec().GetFilename().AsCString());
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}
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}
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}
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}
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}
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return changed;
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}
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//----------------------------------------------------------------------
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// Static callback function that gets called when our DYLD notification
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// breakpoint gets hit. We update all of our image infos and then
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// let our super class DynamicLoader class decide if we should stop
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// or not (based on global preference).
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//----------------------------------------------------------------------
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bool
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DynamicLoaderDarwinKernel::BreakpointHitCallback (void *baton,
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StoppointCallbackContext *context,
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user_id_t break_id,
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user_id_t break_loc_id)
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{
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return static_cast<DynamicLoaderDarwinKernel*>(baton)->BreakpointHit (context, break_id, break_loc_id);
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}
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bool
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DynamicLoaderDarwinKernel::BreakpointHit (StoppointCallbackContext *context,
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user_id_t break_id,
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user_id_t break_loc_id)
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{
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LogSP log(GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER));
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if (log)
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log->Printf ("DynamicLoaderDarwinKernel::BreakpointHit (...)\n");
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ReadAllKextSummaries ();
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if (log)
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PutToLog(log.get());
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return GetStopWhenImagesChange();
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}
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bool
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DynamicLoaderDarwinKernel::ReadKextSummaryHeader ()
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{
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Mutex::Locker locker(m_mutex);
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// the all image infos is already valid for this process stop ID
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m_kext_summaries.clear();
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if (m_kext_summary_header_ptr_addr.IsValid())
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{
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const uint32_t addr_size = m_kernel.GetAddressByteSize ();
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const ByteOrder byte_order = m_kernel.GetByteOrder();
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Error error;
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// Read enough bytes for a "OSKextLoadedKextSummaryHeader" structure
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// which is currenty 4 uint32_t and a pointer.
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uint8_t buf[24];
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DataExtractor data (buf, sizeof(buf), byte_order, addr_size);
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const size_t count = 4 * sizeof(uint32_t) + addr_size;
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const bool prefer_file_cache = false;
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if (m_process->GetTarget().ReadPointerFromMemory (m_kext_summary_header_ptr_addr,
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prefer_file_cache,
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error,
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m_kext_summary_header_addr))
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{
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// We got a valid address for our kext summary header and make sure it isn't NULL
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if (m_kext_summary_header_addr.IsValid() &&
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m_kext_summary_header_addr.GetFileAddress() != 0)
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{
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const size_t bytes_read = m_process->GetTarget().ReadMemory (m_kext_summary_header_addr, prefer_file_cache, buf, count, error);
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if (bytes_read == count)
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{
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uint32_t offset = 0;
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m_kext_summary_header.version = data.GetU32(&offset);
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if (m_kext_summary_header.version >= 2)
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{
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m_kext_summary_header.entry_size = data.GetU32(&offset);
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}
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else
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{
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// Versions less than 2 didn't have an entry size, it was hard coded
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m_kext_summary_header.entry_size = KERNEL_MODULE_ENTRY_SIZE_VERSION_1;
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}
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m_kext_summary_header.entry_count = data.GetU32(&offset);
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return true;
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}
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}
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}
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}
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m_kext_summary_header_addr.Clear();
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return false;
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}
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bool
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DynamicLoaderDarwinKernel::ParseKextSummaries (const Address &kext_summary_addr,
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uint32_t count)
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{
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OSKextLoadedKextSummary::collection kext_summaries;
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LogSP log(GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER));
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if (log)
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log->Printf ("Adding %d modules.\n", count);
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Mutex::Locker locker(m_mutex);
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if (!ReadKextSummaries (kext_summary_addr, count, kext_summaries))
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return false;
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Stream *s = &m_process->GetTarget().GetDebugger().GetOutputStream();
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for (uint32_t i = 0; i < count; i++)
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{
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if (s)
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{
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const uint8_t *u = (const uint8_t *)kext_summaries[i].uuid.GetBytes();
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if (u)
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{
|
|
s->Printf("Loading kext: %2.2X%2.2X%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X%2.2X%2.2X%2.2X%2.2X 0x%16.16llx \"%s\"...",
|
|
u[ 0], u[ 1], u[ 2], u[ 3], u[ 4], u[ 5], u[ 6], u[ 7],
|
|
u[ 8], u[ 9], u[10], u[11], u[12], u[13], u[14], u[15],
|
|
kext_summaries[i].address, kext_summaries[i].name);
|
|
}
|
|
else
|
|
{
|
|
s->Printf("0x%16.16llx \"%s\"...", kext_summaries[i].address, kext_summaries[i].name);
|
|
}
|
|
}
|
|
|
|
DataExtractor data; // Load command data
|
|
if (ReadMachHeader (kext_summaries[i], &data))
|
|
{
|
|
ParseLoadCommands (data, kext_summaries[i]);
|
|
}
|
|
|
|
if (s)
|
|
{
|
|
if (kext_summaries[i].module_sp)
|
|
s->Printf("\n found kext: %s/%s\n",
|
|
kext_summaries[i].module_sp->GetFileSpec().GetDirectory().AsCString(),
|
|
kext_summaries[i].module_sp->GetFileSpec().GetFilename().AsCString());
|
|
else
|
|
s->Printf (" failed to locate/load.\n");
|
|
}
|
|
|
|
if (log)
|
|
kext_summaries[i].PutToLog (log.get());
|
|
}
|
|
bool return_value = AddModulesUsingImageInfos (kext_summaries);
|
|
return return_value;
|
|
}
|
|
|
|
// Adds the modules in image_infos to m_kext_summaries.
|
|
// NB don't call this passing in m_kext_summaries.
|
|
|
|
bool
|
|
DynamicLoaderDarwinKernel::AddModulesUsingImageInfos (OSKextLoadedKextSummary::collection &image_infos)
|
|
{
|
|
// Now add these images to the main list.
|
|
ModuleList loaded_module_list;
|
|
|
|
for (uint32_t idx = 0; idx < image_infos.size(); ++idx)
|
|
{
|
|
m_kext_summaries.push_back(image_infos[idx]);
|
|
|
|
if (FindTargetModule (image_infos[idx], true, NULL))
|
|
{
|
|
// UpdateImageLoadAddress will return true if any segments
|
|
// change load address. We need to check this so we don't
|
|
// mention that all loaded shared libraries are newly loaded
|
|
// each time we hit out dyld breakpoint since dyld will list all
|
|
// shared libraries each time.
|
|
if (UpdateImageLoadAddress (image_infos[idx]))
|
|
{
|
|
loaded_module_list.AppendIfNeeded (image_infos[idx].module_sp);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (loaded_module_list.GetSize() > 0)
|
|
{
|
|
// FIXME: This should really be in the Runtime handlers class, which should get
|
|
// called by the target's ModulesDidLoad, but we're doing it all locally for now
|
|
// to save time.
|
|
// Also, I'm assuming there can be only one libobjc dylib loaded...
|
|
|
|
ObjCLanguageRuntime *objc_runtime = m_process->GetObjCLanguageRuntime();
|
|
if (objc_runtime != NULL && !objc_runtime->HasReadObjCLibrary())
|
|
{
|
|
size_t num_modules = loaded_module_list.GetSize();
|
|
for (int i = 0; i < num_modules; i++)
|
|
{
|
|
if (objc_runtime->IsModuleObjCLibrary (loaded_module_list.GetModuleAtIndex (i)))
|
|
{
|
|
objc_runtime->ReadObjCLibrary (loaded_module_list.GetModuleAtIndex (i));
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
// if (log)
|
|
// loaded_module_list.LogUUIDAndPaths (log, "DynamicLoaderDarwinKernel::ModulesDidLoad");
|
|
m_process->GetTarget().ModulesDidLoad (loaded_module_list);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
uint32_t
|
|
DynamicLoaderDarwinKernel::ReadKextSummaries (const Address &kext_summary_addr,
|
|
uint32_t image_infos_count,
|
|
OSKextLoadedKextSummary::collection &image_infos)
|
|
{
|
|
const ByteOrder endian = m_kernel.GetByteOrder();
|
|
const uint32_t addr_size = m_kernel.GetAddressByteSize();
|
|
|
|
image_infos.resize(image_infos_count);
|
|
const size_t count = image_infos.size() * m_kext_summary_header.entry_size;
|
|
DataBufferHeap data(count, 0);
|
|
Error error;
|
|
|
|
Stream *s = &m_process->GetTarget().GetDebugger().GetOutputStream();
|
|
|
|
if (s)
|
|
s->Printf ("Reading %u kext summaries...\n", image_infos_count);
|
|
const bool prefer_file_cache = false;
|
|
const size_t bytes_read = m_process->GetTarget().ReadMemory (kext_summary_addr,
|
|
prefer_file_cache,
|
|
data.GetBytes(),
|
|
data.GetByteSize(),
|
|
error);
|
|
if (bytes_read == count)
|
|
{
|
|
|
|
DataExtractor extractor (data.GetBytes(), data.GetByteSize(), endian, addr_size);
|
|
uint32_t i=0;
|
|
for (uint32_t kext_summary_offset = 0;
|
|
i < image_infos.size() && extractor.ValidOffsetForDataOfSize(kext_summary_offset, m_kext_summary_header.entry_size);
|
|
++i, kext_summary_offset += m_kext_summary_header.entry_size)
|
|
{
|
|
uint32_t offset = kext_summary_offset;
|
|
const void *name_data = extractor.GetData(&offset, KERNEL_MODULE_MAX_NAME);
|
|
if (name_data == NULL)
|
|
break;
|
|
memcpy (image_infos[i].name, name_data, KERNEL_MODULE_MAX_NAME);
|
|
image_infos[i].uuid.SetBytes(extractor.GetData (&offset, 16));
|
|
image_infos[i].address = extractor.GetU64(&offset);
|
|
if (!image_infos[i].so_address.SetLoadAddress (image_infos[i].address, &m_process->GetTarget()))
|
|
m_process->GetTarget().GetImages().ResolveFileAddress (image_infos[i].address, image_infos[i].so_address);
|
|
image_infos[i].size = extractor.GetU64(&offset);
|
|
image_infos[i].version = extractor.GetU64(&offset);
|
|
image_infos[i].load_tag = extractor.GetU32(&offset);
|
|
image_infos[i].flags = extractor.GetU32(&offset);
|
|
if ((offset - kext_summary_offset) < m_kext_summary_header.entry_size)
|
|
{
|
|
image_infos[i].reference_list = extractor.GetU64(&offset);
|
|
}
|
|
else
|
|
{
|
|
image_infos[i].reference_list = 0;
|
|
}
|
|
}
|
|
if (i < image_infos.size())
|
|
image_infos.resize(i);
|
|
}
|
|
else
|
|
{
|
|
image_infos.clear();
|
|
}
|
|
return image_infos.size();
|
|
}
|
|
|
|
bool
|
|
DynamicLoaderDarwinKernel::ReadAllKextSummaries ()
|
|
{
|
|
LogSP log(GetLogIfAnyCategoriesSet (LIBLLDB_LOG_DYNAMIC_LOADER));
|
|
|
|
Mutex::Locker locker(m_mutex);
|
|
|
|
if (ReadKextSummaryHeader ())
|
|
{
|
|
if (m_kext_summary_header.entry_count > 0 && m_kext_summary_header_addr.IsValid())
|
|
{
|
|
Address summary_addr (m_kext_summary_header_addr);
|
|
summary_addr.Slide(m_kext_summary_header.GetSize());
|
|
if (!ParseKextSummaries (summary_addr, m_kext_summary_header.entry_count))
|
|
{
|
|
m_kext_summaries.clear();
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Read a mach_header at ADDR into HEADER, and also fill in the load
|
|
// command data into LOAD_COMMAND_DATA if it is non-NULL.
|
|
//
|
|
// Returns true if we succeed, false if we fail for any reason.
|
|
//----------------------------------------------------------------------
|
|
bool
|
|
DynamicLoaderDarwinKernel::ReadMachHeader (OSKextLoadedKextSummary& kext_summary, DataExtractor *load_command_data)
|
|
{
|
|
DataBufferHeap header_bytes(sizeof(llvm::MachO::mach_header), 0);
|
|
Error error;
|
|
const bool prefer_file_cache = false;
|
|
size_t bytes_read = m_process->GetTarget().ReadMemory (kext_summary.so_address,
|
|
prefer_file_cache,
|
|
header_bytes.GetBytes(),
|
|
header_bytes.GetByteSize(),
|
|
error);
|
|
if (bytes_read == sizeof(llvm::MachO::mach_header))
|
|
{
|
|
uint32_t offset = 0;
|
|
::memset (&kext_summary.header, 0, sizeof(kext_summary.header));
|
|
|
|
// Get the magic byte unswapped so we can figure out what we are dealing with
|
|
DataExtractor data(header_bytes.GetBytes(), header_bytes.GetByteSize(), endian::InlHostByteOrder(), 4);
|
|
kext_summary.header.magic = data.GetU32(&offset);
|
|
Address load_cmd_addr = kext_summary.so_address;
|
|
data.SetByteOrder(DynamicLoaderDarwinKernel::GetByteOrderFromMagic(kext_summary.header.magic));
|
|
switch (kext_summary.header.magic)
|
|
{
|
|
case llvm::MachO::HeaderMagic32:
|
|
case llvm::MachO::HeaderMagic32Swapped:
|
|
data.SetAddressByteSize(4);
|
|
load_cmd_addr.Slide (sizeof(llvm::MachO::mach_header));
|
|
break;
|
|
|
|
case llvm::MachO::HeaderMagic64:
|
|
case llvm::MachO::HeaderMagic64Swapped:
|
|
data.SetAddressByteSize(8);
|
|
load_cmd_addr.Slide (sizeof(llvm::MachO::mach_header_64));
|
|
break;
|
|
|
|
default:
|
|
return false;
|
|
}
|
|
|
|
// Read the rest of dyld's mach header
|
|
if (data.GetU32(&offset, &kext_summary.header.cputype, (sizeof(llvm::MachO::mach_header)/sizeof(uint32_t)) - 1))
|
|
{
|
|
if (load_command_data == NULL)
|
|
return true; // We were able to read the mach_header and weren't asked to read the load command bytes
|
|
|
|
DataBufferSP load_cmd_data_sp(new DataBufferHeap(kext_summary.header.sizeofcmds, 0));
|
|
|
|
size_t load_cmd_bytes_read = m_process->GetTarget().ReadMemory (load_cmd_addr,
|
|
prefer_file_cache,
|
|
load_cmd_data_sp->GetBytes(),
|
|
load_cmd_data_sp->GetByteSize(),
|
|
error);
|
|
|
|
if (load_cmd_bytes_read == kext_summary.header.sizeofcmds)
|
|
{
|
|
// Set the load command data and also set the correct endian
|
|
// swap settings and the correct address size
|
|
load_command_data->SetData(load_cmd_data_sp, 0, kext_summary.header.sizeofcmds);
|
|
load_command_data->SetByteOrder(data.GetByteOrder());
|
|
load_command_data->SetAddressByteSize(data.GetAddressByteSize());
|
|
return true; // We successfully read the mach_header and the load command data
|
|
}
|
|
|
|
return false; // We weren't able to read the load command data
|
|
}
|
|
}
|
|
return false; // We failed the read the mach_header
|
|
}
|
|
|
|
|
|
//----------------------------------------------------------------------
|
|
// Parse the load commands for an image
|
|
//----------------------------------------------------------------------
|
|
uint32_t
|
|
DynamicLoaderDarwinKernel::ParseLoadCommands (const DataExtractor& data, OSKextLoadedKextSummary& image_info)
|
|
{
|
|
uint32_t offset = 0;
|
|
uint32_t cmd_idx;
|
|
Segment segment;
|
|
image_info.Clear (true);
|
|
|
|
for (cmd_idx = 0; cmd_idx < image_info.header.ncmds; cmd_idx++)
|
|
{
|
|
// Clear out any load command specific data from image_info since
|
|
// we are about to read it.
|
|
|
|
if (data.ValidOffsetForDataOfSize (offset, sizeof(llvm::MachO::load_command)))
|
|
{
|
|
llvm::MachO::load_command load_cmd;
|
|
uint32_t load_cmd_offset = offset;
|
|
load_cmd.cmd = data.GetU32 (&offset);
|
|
load_cmd.cmdsize = data.GetU32 (&offset);
|
|
switch (load_cmd.cmd)
|
|
{
|
|
case llvm::MachO::LoadCommandSegment32:
|
|
{
|
|
segment.name.SetTrimmedCStringWithLength ((const char *)data.GetData(&offset, 16), 16);
|
|
// We are putting 4 uint32_t values 4 uint64_t values so
|
|
// we have to use multiple 32 bit gets below.
|
|
segment.vmaddr = data.GetU32 (&offset);
|
|
segment.vmsize = data.GetU32 (&offset);
|
|
segment.fileoff = data.GetU32 (&offset);
|
|
segment.filesize = data.GetU32 (&offset);
|
|
// Extract maxprot, initprot, nsects and flags all at once
|
|
data.GetU32(&offset, &segment.maxprot, 4);
|
|
image_info.segments.push_back (segment);
|
|
}
|
|
break;
|
|
|
|
case llvm::MachO::LoadCommandSegment64:
|
|
{
|
|
segment.name.SetTrimmedCStringWithLength ((const char *)data.GetData(&offset, 16), 16);
|
|
// Extract vmaddr, vmsize, fileoff, and filesize all at once
|
|
data.GetU64(&offset, &segment.vmaddr, 4);
|
|
// Extract maxprot, initprot, nsects and flags all at once
|
|
data.GetU32(&offset, &segment.maxprot, 4);
|
|
image_info.segments.push_back (segment);
|
|
}
|
|
break;
|
|
|
|
case llvm::MachO::LoadCommandUUID:
|
|
image_info.uuid.SetBytes(data.GetData (&offset, 16));
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
// Set offset to be the beginning of the next load command.
|
|
offset = load_cmd_offset + load_cmd.cmdsize;
|
|
}
|
|
}
|
|
#if 0
|
|
// No slide in the kernel...
|
|
|
|
// All sections listed in the dyld image info structure will all
|
|
// either be fixed up already, or they will all be off by a single
|
|
// slide amount that is determined by finding the first segment
|
|
// that is at file offset zero which also has bytes (a file size
|
|
// that is greater than zero) in the object file.
|
|
|
|
// Determine the slide amount (if any)
|
|
const size_t num_sections = image_info.segments.size();
|
|
for (size_t i = 0; i < num_sections; ++i)
|
|
{
|
|
// Iterate through the object file sections to find the
|
|
// first section that starts of file offset zero and that
|
|
// has bytes in the file...
|
|
if (image_info.segments[i].fileoff == 0 && image_info.segments[i].filesize > 0)
|
|
{
|
|
image_info.slide = image_info.address - image_info.segments[i].vmaddr;
|
|
// We have found the slide amount, so we can exit
|
|
// this for loop.
|
|
break;
|
|
}
|
|
}
|
|
#endif
|
|
if (image_info.uuid.IsValid())
|
|
{
|
|
bool did_create = false;
|
|
if (FindTargetModule(image_info, true, &did_create))
|
|
{
|
|
if (did_create)
|
|
image_info.module_create_stop_id = m_process->GetStopID();
|
|
}
|
|
}
|
|
return cmd_idx;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Dump a Segment to the file handle provided.
|
|
//----------------------------------------------------------------------
|
|
void
|
|
DynamicLoaderDarwinKernel::Segment::PutToLog (Log *log, addr_t slide) const
|
|
{
|
|
if (log)
|
|
{
|
|
if (slide == 0)
|
|
log->Printf ("\t\t%16s [0x%16.16llx - 0x%16.16llx)",
|
|
name.AsCString(""),
|
|
vmaddr + slide,
|
|
vmaddr + slide + vmsize);
|
|
else
|
|
log->Printf ("\t\t%16s [0x%16.16llx - 0x%16.16llx) slide = 0x%llx",
|
|
name.AsCString(""),
|
|
vmaddr + slide,
|
|
vmaddr + slide + vmsize,
|
|
slide);
|
|
}
|
|
}
|
|
|
|
const DynamicLoaderDarwinKernel::Segment *
|
|
DynamicLoaderDarwinKernel::OSKextLoadedKextSummary::FindSegment (const ConstString &name) const
|
|
{
|
|
const size_t num_segments = segments.size();
|
|
for (size_t i=0; i<num_segments; ++i)
|
|
{
|
|
if (segments[i].name == name)
|
|
return &segments[i];
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
|
|
//----------------------------------------------------------------------
|
|
// Dump an image info structure to the file handle provided.
|
|
//----------------------------------------------------------------------
|
|
void
|
|
DynamicLoaderDarwinKernel::OSKextLoadedKextSummary::PutToLog (Log *log) const
|
|
{
|
|
if (log == NULL)
|
|
return;
|
|
const uint8_t *u = (uint8_t *)uuid.GetBytes();
|
|
|
|
if (address == LLDB_INVALID_ADDRESS)
|
|
{
|
|
if (u)
|
|
{
|
|
log->Printf("\tuuid=%2.2X%2.2X%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X%2.2X%2.2X%2.2X%2.2X name=\"%s\" (UNLOADED)",
|
|
u[ 0], u[ 1], u[ 2], u[ 3],
|
|
u[ 4], u[ 5], u[ 6], u[ 7],
|
|
u[ 8], u[ 9], u[10], u[11],
|
|
u[12], u[13], u[14], u[15],
|
|
name);
|
|
}
|
|
else
|
|
log->Printf("\tname=\"%s\" (UNLOADED)", name);
|
|
}
|
|
else
|
|
{
|
|
if (u)
|
|
{
|
|
log->Printf("\taddr=0x%16.16llx size=0x%16.16llx version=0x%16.16llx load-tag=0x%8.8x flags=0x%8.8x ref-list=0x%16.16llx uuid=%2.2X%2.2X%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X-%2.2X%2.2X%2.2X%2.2X%2.2X%2.2X name=\"%s\"",
|
|
address, size, version, load_tag, flags, reference_list,
|
|
u[ 0], u[ 1], u[ 2], u[ 3], u[ 4], u[ 5], u[ 6], u[ 7],
|
|
u[ 8], u[ 9], u[10], u[11], u[12], u[13], u[14], u[15],
|
|
name);
|
|
}
|
|
else
|
|
{
|
|
log->Printf("\t[0x%16.16llx - 0x%16.16llx) version=0x%16.16llx load-tag=0x%8.8x flags=0x%8.8x ref-list=0x%16.16llx name=\"%s\"",
|
|
address, address+size, version, load_tag, flags, reference_list,
|
|
name);
|
|
}
|
|
for (uint32_t i=0; i<segments.size(); ++i)
|
|
segments[i].PutToLog(log, 0);
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Dump the _dyld_all_image_infos members and all current image infos
|
|
// that we have parsed to the file handle provided.
|
|
//----------------------------------------------------------------------
|
|
void
|
|
DynamicLoaderDarwinKernel::PutToLog(Log *log) const
|
|
{
|
|
if (log == NULL)
|
|
return;
|
|
|
|
Mutex::Locker locker(m_mutex);
|
|
log->Printf("gLoadedKextSummaries = 0x%16.16llx { version=%u, entry_size=%u, entry_count=%u }",
|
|
m_kext_summary_header_addr.GetFileAddress(),
|
|
m_kext_summary_header.version,
|
|
m_kext_summary_header.entry_size,
|
|
m_kext_summary_header.entry_count);
|
|
|
|
size_t i;
|
|
const size_t count = m_kext_summaries.size();
|
|
if (count > 0)
|
|
{
|
|
log->PutCString("Loaded:");
|
|
for (i = 0; i<count; i++)
|
|
m_kext_summaries[i].PutToLog(log);
|
|
}
|
|
}
|
|
|
|
void
|
|
DynamicLoaderDarwinKernel::PrivateInitialize(Process *process)
|
|
{
|
|
DEBUG_PRINTF("DynamicLoaderDarwinKernel::%s() process state = %s\n", __FUNCTION__, StateAsCString(m_process->GetState()));
|
|
Clear(true);
|
|
m_process = process;
|
|
m_process->GetTarget().GetSectionLoadList().Clear();
|
|
}
|
|
|
|
void
|
|
DynamicLoaderDarwinKernel::SetNotificationBreakpointIfNeeded ()
|
|
{
|
|
if (m_break_id == LLDB_INVALID_BREAK_ID)
|
|
{
|
|
DEBUG_PRINTF("DynamicLoaderDarwinKernel::%s() process state = %s\n", __FUNCTION__, StateAsCString(m_process->GetState()));
|
|
|
|
|
|
const bool internal_bp = false;
|
|
const LazyBool skip_prologue = eLazyBoolNo;
|
|
FileSpecList module_spec_list;
|
|
module_spec_list.Append (m_kernel.module_sp->GetFileSpec());
|
|
Breakpoint *bp = m_process->GetTarget().CreateBreakpoint (&module_spec_list,
|
|
NULL,
|
|
"OSKextLoadedKextSummariesUpdated",
|
|
eFunctionNameTypeFull,
|
|
internal_bp,
|
|
skip_prologue).get();
|
|
|
|
bp->SetCallback (DynamicLoaderDarwinKernel::BreakpointHitCallback, this, true);
|
|
m_break_id = bp->GetID();
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// Member function that gets called when the process state changes.
|
|
//----------------------------------------------------------------------
|
|
void
|
|
DynamicLoaderDarwinKernel::PrivateProcessStateChanged (Process *process, StateType state)
|
|
{
|
|
DEBUG_PRINTF("DynamicLoaderDarwinKernel::%s(%s)\n", __FUNCTION__, StateAsCString(state));
|
|
switch (state)
|
|
{
|
|
case eStateConnected:
|
|
case eStateAttaching:
|
|
case eStateLaunching:
|
|
case eStateInvalid:
|
|
case eStateUnloaded:
|
|
case eStateExited:
|
|
case eStateDetached:
|
|
Clear(false);
|
|
break;
|
|
|
|
case eStateStopped:
|
|
UpdateIfNeeded();
|
|
break;
|
|
|
|
case eStateRunning:
|
|
case eStateStepping:
|
|
case eStateCrashed:
|
|
case eStateSuspended:
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
ThreadPlanSP
|
|
DynamicLoaderDarwinKernel::GetStepThroughTrampolinePlan (Thread &thread, bool stop_others)
|
|
{
|
|
ThreadPlanSP thread_plan_sp;
|
|
LogSP log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_STEP));
|
|
if (log)
|
|
log->Printf ("Could not find symbol for step through.");
|
|
return thread_plan_sp;
|
|
}
|
|
|
|
Error
|
|
DynamicLoaderDarwinKernel::CanLoadImage ()
|
|
{
|
|
Error error;
|
|
error.SetErrorString("always unsafe to load or unload shared libraries in the darwin kernel");
|
|
return error;
|
|
}
|
|
|
|
void
|
|
DynamicLoaderDarwinKernel::Initialize()
|
|
{
|
|
PluginManager::RegisterPlugin (GetPluginNameStatic(),
|
|
GetPluginDescriptionStatic(),
|
|
CreateInstance);
|
|
}
|
|
|
|
void
|
|
DynamicLoaderDarwinKernel::Terminate()
|
|
{
|
|
PluginManager::UnregisterPlugin (CreateInstance);
|
|
}
|
|
|
|
|
|
const char *
|
|
DynamicLoaderDarwinKernel::GetPluginNameStatic()
|
|
{
|
|
return "dynamic-loader.macosx-kernel";
|
|
}
|
|
|
|
const char *
|
|
DynamicLoaderDarwinKernel::GetPluginDescriptionStatic()
|
|
{
|
|
return "Dynamic loader plug-in that watches for shared library loads/unloads in the MacOSX kernel.";
|
|
}
|
|
|
|
|
|
//------------------------------------------------------------------
|
|
// PluginInterface protocol
|
|
//------------------------------------------------------------------
|
|
const char *
|
|
DynamicLoaderDarwinKernel::GetPluginName()
|
|
{
|
|
return "DynamicLoaderDarwinKernel";
|
|
}
|
|
|
|
const char *
|
|
DynamicLoaderDarwinKernel::GetShortPluginName()
|
|
{
|
|
return GetPluginNameStatic();
|
|
}
|
|
|
|
uint32_t
|
|
DynamicLoaderDarwinKernel::GetPluginVersion()
|
|
{
|
|
return 1;
|
|
}
|
|
|