diff options
Diffstat (limited to 'lldb/source/Symbol/CompactUnwindInfo.cpp')
| -rw-r--r-- | lldb/source/Symbol/CompactUnwindInfo.cpp | 2944 |
1 files changed, 1449 insertions, 1495 deletions
diff --git a/lldb/source/Symbol/CompactUnwindInfo.cpp b/lldb/source/Symbol/CompactUnwindInfo.cpp index 105c3c242c0..e3da6f17cfa 100644 --- a/lldb/source/Symbol/CompactUnwindInfo.cpp +++ b/lldb/source/Symbol/CompactUnwindInfo.cpp @@ -7,7 +7,6 @@ // //===----------------------------------------------------------------------===// - // C Includes // C++ Includes #include <algorithm> @@ -30,125 +29,114 @@ using namespace lldb; using namespace lldb_private; - namespace lldb_private { - // Constants from <mach-o/compact_unwind_encoding.h> - - FLAGS_ANONYMOUS_ENUM() - { - UNWIND_IS_NOT_FUNCTION_START = 0x80000000, - UNWIND_HAS_LSDA = 0x40000000, - UNWIND_PERSONALITY_MASK = 0x30000000, - }; - - FLAGS_ANONYMOUS_ENUM() - { - UNWIND_X86_MODE_MASK = 0x0F000000, - UNWIND_X86_MODE_EBP_FRAME = 0x01000000, - UNWIND_X86_MODE_STACK_IMMD = 0x02000000, - UNWIND_X86_MODE_STACK_IND = 0x03000000, - UNWIND_X86_MODE_DWARF = 0x04000000, - - UNWIND_X86_EBP_FRAME_REGISTERS = 0x00007FFF, - UNWIND_X86_EBP_FRAME_OFFSET = 0x00FF0000, - - UNWIND_X86_FRAMELESS_STACK_SIZE = 0x00FF0000, - UNWIND_X86_FRAMELESS_STACK_ADJUST = 0x0000E000, - UNWIND_X86_FRAMELESS_STACK_REG_COUNT = 0x00001C00, - UNWIND_X86_FRAMELESS_STACK_REG_PERMUTATION = 0x000003FF, - - UNWIND_X86_DWARF_SECTION_OFFSET = 0x00FFFFFF, - }; - - enum - { - UNWIND_X86_REG_NONE = 0, - UNWIND_X86_REG_EBX = 1, - UNWIND_X86_REG_ECX = 2, - UNWIND_X86_REG_EDX = 3, - UNWIND_X86_REG_EDI = 4, - UNWIND_X86_REG_ESI = 5, - UNWIND_X86_REG_EBP = 6, - }; - - FLAGS_ANONYMOUS_ENUM() - { - UNWIND_X86_64_MODE_MASK = 0x0F000000, - UNWIND_X86_64_MODE_RBP_FRAME = 0x01000000, - UNWIND_X86_64_MODE_STACK_IMMD = 0x02000000, - UNWIND_X86_64_MODE_STACK_IND = 0x03000000, - UNWIND_X86_64_MODE_DWARF = 0x04000000, - - UNWIND_X86_64_RBP_FRAME_REGISTERS = 0x00007FFF, - UNWIND_X86_64_RBP_FRAME_OFFSET = 0x00FF0000, - - UNWIND_X86_64_FRAMELESS_STACK_SIZE = 0x00FF0000, - UNWIND_X86_64_FRAMELESS_STACK_ADJUST = 0x0000E000, - UNWIND_X86_64_FRAMELESS_STACK_REG_COUNT = 0x00001C00, - UNWIND_X86_64_FRAMELESS_STACK_REG_PERMUTATION = 0x000003FF, - - UNWIND_X86_64_DWARF_SECTION_OFFSET = 0x00FFFFFF, - }; - - enum - { - UNWIND_X86_64_REG_NONE = 0, - UNWIND_X86_64_REG_RBX = 1, - UNWIND_X86_64_REG_R12 = 2, - UNWIND_X86_64_REG_R13 = 3, - UNWIND_X86_64_REG_R14 = 4, - UNWIND_X86_64_REG_R15 = 5, - UNWIND_X86_64_REG_RBP = 6, - }; - - FLAGS_ANONYMOUS_ENUM() - { - UNWIND_ARM64_MODE_MASK = 0x0F000000, - UNWIND_ARM64_MODE_FRAMELESS = 0x02000000, - UNWIND_ARM64_MODE_DWARF = 0x03000000, - UNWIND_ARM64_MODE_FRAME = 0x04000000, - - UNWIND_ARM64_FRAME_X19_X20_PAIR = 0x00000001, - UNWIND_ARM64_FRAME_X21_X22_PAIR = 0x00000002, - UNWIND_ARM64_FRAME_X23_X24_PAIR = 0x00000004, - UNWIND_ARM64_FRAME_X25_X26_PAIR = 0x00000008, - UNWIND_ARM64_FRAME_X27_X28_PAIR = 0x00000010, - UNWIND_ARM64_FRAME_D8_D9_PAIR = 0x00000100, - UNWIND_ARM64_FRAME_D10_D11_PAIR = 0x00000200, - UNWIND_ARM64_FRAME_D12_D13_PAIR = 0x00000400, - UNWIND_ARM64_FRAME_D14_D15_PAIR = 0x00000800, - - UNWIND_ARM64_FRAMELESS_STACK_SIZE_MASK = 0x00FFF000, - UNWIND_ARM64_DWARF_SECTION_OFFSET = 0x00FFFFFF, - }; - - FLAGS_ANONYMOUS_ENUM() - { - UNWIND_ARM_MODE_MASK = 0x0F000000, - UNWIND_ARM_MODE_FRAME = 0x01000000, - UNWIND_ARM_MODE_FRAME_D = 0x02000000, - UNWIND_ARM_MODE_DWARF = 0x04000000, - - UNWIND_ARM_FRAME_STACK_ADJUST_MASK = 0x00C00000, - - UNWIND_ARM_FRAME_FIRST_PUSH_R4 = 0x00000001, - UNWIND_ARM_FRAME_FIRST_PUSH_R5 = 0x00000002, - UNWIND_ARM_FRAME_FIRST_PUSH_R6 = 0x00000004, - - UNWIND_ARM_FRAME_SECOND_PUSH_R8 = 0x00000008, - UNWIND_ARM_FRAME_SECOND_PUSH_R9 = 0x00000010, - UNWIND_ARM_FRAME_SECOND_PUSH_R10 = 0x00000020, - UNWIND_ARM_FRAME_SECOND_PUSH_R11 = 0x00000040, - UNWIND_ARM_FRAME_SECOND_PUSH_R12 = 0x00000080, - - UNWIND_ARM_FRAME_D_REG_COUNT_MASK = 0x00000700, - - UNWIND_ARM_DWARF_SECTION_OFFSET = 0x00FFFFFF, - }; +// Constants from <mach-o/compact_unwind_encoding.h> -} +FLAGS_ANONYMOUS_ENUM(){ + UNWIND_IS_NOT_FUNCTION_START = 0x80000000, UNWIND_HAS_LSDA = 0x40000000, + UNWIND_PERSONALITY_MASK = 0x30000000, +}; + +FLAGS_ANONYMOUS_ENUM(){ + UNWIND_X86_MODE_MASK = 0x0F000000, + UNWIND_X86_MODE_EBP_FRAME = 0x01000000, + UNWIND_X86_MODE_STACK_IMMD = 0x02000000, + UNWIND_X86_MODE_STACK_IND = 0x03000000, + UNWIND_X86_MODE_DWARF = 0x04000000, + + UNWIND_X86_EBP_FRAME_REGISTERS = 0x00007FFF, + UNWIND_X86_EBP_FRAME_OFFSET = 0x00FF0000, + + UNWIND_X86_FRAMELESS_STACK_SIZE = 0x00FF0000, + UNWIND_X86_FRAMELESS_STACK_ADJUST = 0x0000E000, + UNWIND_X86_FRAMELESS_STACK_REG_COUNT = 0x00001C00, + UNWIND_X86_FRAMELESS_STACK_REG_PERMUTATION = 0x000003FF, + + UNWIND_X86_DWARF_SECTION_OFFSET = 0x00FFFFFF, +}; + +enum { + UNWIND_X86_REG_NONE = 0, + UNWIND_X86_REG_EBX = 1, + UNWIND_X86_REG_ECX = 2, + UNWIND_X86_REG_EDX = 3, + UNWIND_X86_REG_EDI = 4, + UNWIND_X86_REG_ESI = 5, + UNWIND_X86_REG_EBP = 6, +}; + +FLAGS_ANONYMOUS_ENUM(){ + UNWIND_X86_64_MODE_MASK = 0x0F000000, + UNWIND_X86_64_MODE_RBP_FRAME = 0x01000000, + UNWIND_X86_64_MODE_STACK_IMMD = 0x02000000, + UNWIND_X86_64_MODE_STACK_IND = 0x03000000, + UNWIND_X86_64_MODE_DWARF = 0x04000000, + + UNWIND_X86_64_RBP_FRAME_REGISTERS = 0x00007FFF, + UNWIND_X86_64_RBP_FRAME_OFFSET = 0x00FF0000, + + UNWIND_X86_64_FRAMELESS_STACK_SIZE = 0x00FF0000, + UNWIND_X86_64_FRAMELESS_STACK_ADJUST = 0x0000E000, + UNWIND_X86_64_FRAMELESS_STACK_REG_COUNT = 0x00001C00, + UNWIND_X86_64_FRAMELESS_STACK_REG_PERMUTATION = 0x000003FF, + + UNWIND_X86_64_DWARF_SECTION_OFFSET = 0x00FFFFFF, +}; + +enum { + UNWIND_X86_64_REG_NONE = 0, + UNWIND_X86_64_REG_RBX = 1, + UNWIND_X86_64_REG_R12 = 2, + UNWIND_X86_64_REG_R13 = 3, + UNWIND_X86_64_REG_R14 = 4, + UNWIND_X86_64_REG_R15 = 5, + UNWIND_X86_64_REG_RBP = 6, +}; + +FLAGS_ANONYMOUS_ENUM(){ + UNWIND_ARM64_MODE_MASK = 0x0F000000, + UNWIND_ARM64_MODE_FRAMELESS = 0x02000000, + UNWIND_ARM64_MODE_DWARF = 0x03000000, + UNWIND_ARM64_MODE_FRAME = 0x04000000, + + UNWIND_ARM64_FRAME_X19_X20_PAIR = 0x00000001, + UNWIND_ARM64_FRAME_X21_X22_PAIR = 0x00000002, + UNWIND_ARM64_FRAME_X23_X24_PAIR = 0x00000004, + UNWIND_ARM64_FRAME_X25_X26_PAIR = 0x00000008, + UNWIND_ARM64_FRAME_X27_X28_PAIR = 0x00000010, + UNWIND_ARM64_FRAME_D8_D9_PAIR = 0x00000100, + UNWIND_ARM64_FRAME_D10_D11_PAIR = 0x00000200, + UNWIND_ARM64_FRAME_D12_D13_PAIR = 0x00000400, + UNWIND_ARM64_FRAME_D14_D15_PAIR = 0x00000800, + + UNWIND_ARM64_FRAMELESS_STACK_SIZE_MASK = 0x00FFF000, + UNWIND_ARM64_DWARF_SECTION_OFFSET = 0x00FFFFFF, +}; + +FLAGS_ANONYMOUS_ENUM(){ + UNWIND_ARM_MODE_MASK = 0x0F000000, + UNWIND_ARM_MODE_FRAME = 0x01000000, + UNWIND_ARM_MODE_FRAME_D = 0x02000000, + UNWIND_ARM_MODE_DWARF = 0x04000000, + + UNWIND_ARM_FRAME_STACK_ADJUST_MASK = 0x00C00000, + UNWIND_ARM_FRAME_FIRST_PUSH_R4 = 0x00000001, + UNWIND_ARM_FRAME_FIRST_PUSH_R5 = 0x00000002, + UNWIND_ARM_FRAME_FIRST_PUSH_R6 = 0x00000004, + + UNWIND_ARM_FRAME_SECOND_PUSH_R8 = 0x00000008, + UNWIND_ARM_FRAME_SECOND_PUSH_R9 = 0x00000010, + UNWIND_ARM_FRAME_SECOND_PUSH_R10 = 0x00000020, + UNWIND_ARM_FRAME_SECOND_PUSH_R11 = 0x00000040, + UNWIND_ARM_FRAME_SECOND_PUSH_R12 = 0x00000080, + + UNWIND_ARM_FRAME_D_REG_COUNT_MASK = 0x00000700, + + UNWIND_ARM_DWARF_SECTION_OFFSET = 0x00FFFFFF, +}; +} #ifndef UNWIND_SECOND_LEVEL_REGULAR #define UNWIND_SECOND_LEVEL_REGULAR 2 @@ -159,1515 +147,1481 @@ namespace lldb_private { #endif #ifndef UNWIND_INFO_COMPRESSED_ENTRY_FUNC_OFFSET -#define UNWIND_INFO_COMPRESSED_ENTRY_FUNC_OFFSET(entry) (entry & 0x00FFFFFF) +#define UNWIND_INFO_COMPRESSED_ENTRY_FUNC_OFFSET(entry) (entry & 0x00FFFFFF) #endif #ifndef UNWIND_INFO_COMPRESSED_ENTRY_ENCODING_INDEX -#define UNWIND_INFO_COMPRESSED_ENTRY_ENCODING_INDEX(entry) ((entry >> 24) & 0xFF) +#define UNWIND_INFO_COMPRESSED_ENTRY_ENCODING_INDEX(entry) \ + ((entry >> 24) & 0xFF) #endif -#define EXTRACT_BITS(value, mask) \ - ( (value >> llvm::countTrailingZeros(static_cast<uint32_t>(mask), llvm::ZB_Width)) & \ - (((1 << llvm::countPopulation(static_cast<uint32_t>(mask))))-1) ) - - +#define EXTRACT_BITS(value, mask) \ + ((value >> \ + llvm::countTrailingZeros(static_cast<uint32_t>(mask), llvm::ZB_Width)) & \ + (((1 << llvm::countPopulation(static_cast<uint32_t>(mask)))) - 1)) //---------------------- // constructor //---------------------- CompactUnwindInfo::CompactUnwindInfo(ObjectFile &objfile, SectionSP §ion_sp) - : m_objfile(objfile), - m_section_sp(section_sp), - m_section_contents_if_encrypted(), - m_mutex(), - m_indexes(), - m_indexes_computed(eLazyBoolCalculate), - m_unwindinfo_data(), - m_unwindinfo_data_computed(false), - m_unwind_header() -{ -} + : m_objfile(objfile), m_section_sp(section_sp), + m_section_contents_if_encrypted(), m_mutex(), m_indexes(), + m_indexes_computed(eLazyBoolCalculate), m_unwindinfo_data(), + m_unwindinfo_data_computed(false), m_unwind_header() {} //---------------------- // destructor //---------------------- -CompactUnwindInfo::~CompactUnwindInfo() -{ -} - -bool -CompactUnwindInfo::GetUnwindPlan (Target &target, Address addr, UnwindPlan& unwind_plan) -{ - if (!IsValid (target.GetProcessSP())) - { - return false; - } - FunctionInfo function_info; - if (GetCompactUnwindInfoForFunction (target, addr, function_info)) - { - // shortcut return for functions that have no compact unwind - if (function_info.encoding == 0) - return false; - - ArchSpec arch; - if (m_objfile.GetArchitecture (arch)) - { +CompactUnwindInfo::~CompactUnwindInfo() {} - Log *log(GetLogIfAllCategoriesSet (LIBLLDB_LOG_UNWIND)); - if (log && log->GetVerbose()) - { - StreamString strm; - addr.Dump (&strm, NULL, Address::DumpStyle::DumpStyleResolvedDescriptionNoFunctionArguments, Address::DumpStyle::DumpStyleFileAddress, arch.GetAddressByteSize()); - log->Printf ("Got compact unwind encoding 0x%x for function %s", function_info.encoding, strm.GetData()); - } - - if (function_info.valid_range_offset_start != 0 && function_info.valid_range_offset_end != 0) - { - SectionList *sl = m_objfile.GetSectionList (); - if (sl) - { - addr_t func_range_start_file_addr = - function_info.valid_range_offset_start + m_objfile.GetHeaderAddress().GetFileAddress(); - AddressRange func_range (func_range_start_file_addr, - function_info.valid_range_offset_end - function_info.valid_range_offset_start, - sl); - unwind_plan.SetPlanValidAddressRange (func_range); - } - } - - if (arch.GetTriple().getArch() == llvm::Triple::x86_64) - { - return CreateUnwindPlan_x86_64 (target, function_info, unwind_plan, addr); - } - if (arch.GetTriple().getArch() == llvm::Triple::aarch64) - { - return CreateUnwindPlan_arm64 (target, function_info, unwind_plan, addr); - } - if (arch.GetTriple().getArch() == llvm::Triple::x86) - { - return CreateUnwindPlan_i386 (target, function_info, unwind_plan, addr); - } - if (arch.GetTriple().getArch() == llvm::Triple::arm || arch.GetTriple().getArch() == llvm::Triple::thumb) - { - return CreateUnwindPlan_armv7 (target, function_info, unwind_plan, addr); - } +bool CompactUnwindInfo::GetUnwindPlan(Target &target, Address addr, + UnwindPlan &unwind_plan) { + if (!IsValid(target.GetProcessSP())) { + return false; + } + FunctionInfo function_info; + if (GetCompactUnwindInfoForFunction(target, addr, function_info)) { + // shortcut return for functions that have no compact unwind + if (function_info.encoding == 0) + return false; + + ArchSpec arch; + if (m_objfile.GetArchitecture(arch)) { + + Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_UNWIND)); + if (log && log->GetVerbose()) { + StreamString strm; + addr.Dump( + &strm, NULL, + Address::DumpStyle::DumpStyleResolvedDescriptionNoFunctionArguments, + Address::DumpStyle::DumpStyleFileAddress, + arch.GetAddressByteSize()); + log->Printf("Got compact unwind encoding 0x%x for function %s", + function_info.encoding, strm.GetData()); + } + + if (function_info.valid_range_offset_start != 0 && + function_info.valid_range_offset_end != 0) { + SectionList *sl = m_objfile.GetSectionList(); + if (sl) { + addr_t func_range_start_file_addr = + function_info.valid_range_offset_start + + m_objfile.GetHeaderAddress().GetFileAddress(); + AddressRange func_range(func_range_start_file_addr, + function_info.valid_range_offset_end - + function_info.valid_range_offset_start, + sl); + unwind_plan.SetPlanValidAddressRange(func_range); } + } + + if (arch.GetTriple().getArch() == llvm::Triple::x86_64) { + return CreateUnwindPlan_x86_64(target, function_info, unwind_plan, + addr); + } + if (arch.GetTriple().getArch() == llvm::Triple::aarch64) { + return CreateUnwindPlan_arm64(target, function_info, unwind_plan, addr); + } + if (arch.GetTriple().getArch() == llvm::Triple::x86) { + return CreateUnwindPlan_i386(target, function_info, unwind_plan, addr); + } + if (arch.GetTriple().getArch() == llvm::Triple::arm || + arch.GetTriple().getArch() == llvm::Triple::thumb) { + return CreateUnwindPlan_armv7(target, function_info, unwind_plan, addr); + } } - return false; + } + return false; } -bool -CompactUnwindInfo::IsValid (const ProcessSP &process_sp) -{ - if (m_section_sp.get() == nullptr) - return false; +bool CompactUnwindInfo::IsValid(const ProcessSP &process_sp) { + if (m_section_sp.get() == nullptr) + return false; - if (m_indexes_computed == eLazyBoolYes && m_unwindinfo_data_computed) - return true; + if (m_indexes_computed == eLazyBoolYes && m_unwindinfo_data_computed) + return true; - ScanIndex (process_sp); + ScanIndex(process_sp); - return m_indexes_computed == eLazyBoolYes && m_unwindinfo_data_computed; + return m_indexes_computed == eLazyBoolYes && m_unwindinfo_data_computed; } -void -CompactUnwindInfo::ScanIndex (const ProcessSP &process_sp) -{ - std::lock_guard<std::mutex> guard(m_mutex); - if (m_indexes_computed == eLazyBoolYes && m_unwindinfo_data_computed) - return; - - // We can't read the index for some reason. - if (m_indexes_computed == eLazyBoolNo) - { +void CompactUnwindInfo::ScanIndex(const ProcessSP &process_sp) { + std::lock_guard<std::mutex> guard(m_mutex); + if (m_indexes_computed == eLazyBoolYes && m_unwindinfo_data_computed) + return; + + // We can't read the index for some reason. + if (m_indexes_computed == eLazyBoolNo) { + return; + } + + Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_UNWIND)); + if (log) + m_objfile.GetModule()->LogMessage( + log, "Reading compact unwind first-level indexes"); + + if (m_unwindinfo_data_computed == false) { + if (m_section_sp->IsEncrypted()) { + // Can't get section contents of a protected/encrypted section until we + // have a live + // process and can read them out of memory. + if (process_sp.get() == nullptr) return; + m_section_contents_if_encrypted.reset( + new DataBufferHeap(m_section_sp->GetByteSize(), 0)); + Error error; + if (process_sp->ReadMemory( + m_section_sp->GetLoadBaseAddress(&process_sp->GetTarget()), + m_section_contents_if_encrypted->GetBytes(), + m_section_sp->GetByteSize(), + error) == m_section_sp->GetByteSize() && + error.Success()) { + m_unwindinfo_data.SetAddressByteSize( + process_sp->GetTarget().GetArchitecture().GetAddressByteSize()); + m_unwindinfo_data.SetByteOrder( + process_sp->GetTarget().GetArchitecture().GetByteOrder()); + m_unwindinfo_data.SetData(m_section_contents_if_encrypted, 0); + } + } else { + m_objfile.ReadSectionData(m_section_sp.get(), m_unwindinfo_data); } + if (m_unwindinfo_data.GetByteSize() != m_section_sp->GetByteSize()) + return; + m_unwindinfo_data_computed = true; + } - Log *log (GetLogIfAllCategoriesSet (LIBLLDB_LOG_UNWIND)); - if (log) - m_objfile.GetModule()->LogMessage(log, "Reading compact unwind first-level indexes"); - - if (m_unwindinfo_data_computed == false) - { - if (m_section_sp->IsEncrypted()) - { - // Can't get section contents of a protected/encrypted section until we have a live - // process and can read them out of memory. - if (process_sp.get() == nullptr) - return; - m_section_contents_if_encrypted.reset (new DataBufferHeap (m_section_sp->GetByteSize(), 0)); - Error error; - if (process_sp->ReadMemory ( - m_section_sp->GetLoadBaseAddress (&process_sp->GetTarget()), - m_section_contents_if_encrypted->GetBytes(), - m_section_sp->GetByteSize(), error) == m_section_sp->GetByteSize() && error.Success()) - { - m_unwindinfo_data.SetAddressByteSize (process_sp->GetTarget().GetArchitecture().GetAddressByteSize()); - m_unwindinfo_data.SetByteOrder (process_sp->GetTarget().GetArchitecture().GetByteOrder()); - m_unwindinfo_data.SetData (m_section_contents_if_encrypted, 0); - } - } - else - { - m_objfile.ReadSectionData (m_section_sp.get(), m_unwindinfo_data); - } - if (m_unwindinfo_data.GetByteSize() != m_section_sp->GetByteSize()) - return; - m_unwindinfo_data_computed = true; - } + if (m_unwindinfo_data.GetByteSize() > 0) { + offset_t offset = 0; - if (m_unwindinfo_data.GetByteSize() > 0) - { - offset_t offset = 0; - - // struct unwind_info_section_header - // { - // uint32_t version; // UNWIND_SECTION_VERSION - // uint32_t commonEncodingsArraySectionOffset; - // uint32_t commonEncodingsArrayCount; - // uint32_t personalityArraySectionOffset; - // uint32_t personalityArrayCount; - // uint32_t indexSectionOffset; - // uint32_t indexCount; - - m_unwind_header.version = m_unwindinfo_data.GetU32(&offset); - m_unwind_header.common_encodings_array_offset = m_unwindinfo_data.GetU32(&offset); - m_unwind_header.common_encodings_array_count = m_unwindinfo_data.GetU32(&offset); - m_unwind_header.personality_array_offset = m_unwindinfo_data.GetU32(&offset); - m_unwind_header.personality_array_count = m_unwindinfo_data.GetU32(&offset); - uint32_t indexSectionOffset = m_unwindinfo_data.GetU32(&offset); - - uint32_t indexCount = m_unwindinfo_data.GetU32(&offset); - - if (m_unwind_header.common_encodings_array_offset > m_unwindinfo_data.GetByteSize() - || m_unwind_header.personality_array_offset > m_unwindinfo_data.GetByteSize() - || indexSectionOffset > m_unwindinfo_data.GetByteSize() - || offset > m_unwindinfo_data.GetByteSize()) - { - Host::SystemLog (Host::eSystemLogError, - "error: Invalid offset encountered in compact unwind info, skipping\n"); - // don't trust anything from this compact_unwind section if it looks - // blatantly invalid data in the header. - m_indexes_computed = eLazyBoolNo; - return; - } + // struct unwind_info_section_header + // { + // uint32_t version; // UNWIND_SECTION_VERSION + // uint32_t commonEncodingsArraySectionOffset; + // uint32_t commonEncodingsArrayCount; + // uint32_t personalityArraySectionOffset; + // uint32_t personalityArrayCount; + // uint32_t indexSectionOffset; + // uint32_t indexCount; + + m_unwind_header.version = m_unwindinfo_data.GetU32(&offset); + m_unwind_header.common_encodings_array_offset = + m_unwindinfo_data.GetU32(&offset); + m_unwind_header.common_encodings_array_count = + m_unwindinfo_data.GetU32(&offset); + m_unwind_header.personality_array_offset = + m_unwindinfo_data.GetU32(&offset); + m_unwind_header.personality_array_count = m_unwindinfo_data.GetU32(&offset); + uint32_t indexSectionOffset = m_unwindinfo_data.GetU32(&offset); + + uint32_t indexCount = m_unwindinfo_data.GetU32(&offset); + + if (m_unwind_header.common_encodings_array_offset > + m_unwindinfo_data.GetByteSize() || + m_unwind_header.personality_array_offset > + m_unwindinfo_data.GetByteSize() || + indexSectionOffset > m_unwindinfo_data.GetByteSize() || + offset > m_unwindinfo_data.GetByteSize()) { + Host::SystemLog(Host::eSystemLogError, "error: Invalid offset " + "encountered in compact unwind " + "info, skipping\n"); + // don't trust anything from this compact_unwind section if it looks + // blatantly invalid data in the header. + m_indexes_computed = eLazyBoolNo; + return; + } - // Parse the basic information from the indexes - // We wait to scan the second level page info until it's needed - - // struct unwind_info_section_header_index_entry - // { - // uint32_t functionOffset; - // uint32_t secondLevelPagesSectionOffset; - // uint32_t lsdaIndexArraySectionOffset; - // }; - - bool clear_address_zeroth_bit = false; - ArchSpec arch; - if (m_objfile.GetArchitecture (arch)) - { - if (arch.GetTriple().getArch() == llvm::Triple::arm || arch.GetTriple().getArch() == llvm::Triple::thumb) - clear_address_zeroth_bit = true; - } + // Parse the basic information from the indexes + // We wait to scan the second level page info until it's needed - offset = indexSectionOffset; - for (uint32_t idx = 0; idx < indexCount; idx++) - { - uint32_t function_offset = m_unwindinfo_data.GetU32(&offset); // functionOffset - uint32_t second_level_offset = m_unwindinfo_data.GetU32(&offset); // secondLevelPagesSectionOffset - uint32_t lsda_offset = m_unwindinfo_data.GetU32(&offset); // lsdaIndexArraySectionOffset + // struct unwind_info_section_header_index_entry + // { + // uint32_t functionOffset; + // uint32_t secondLevelPagesSectionOffset; + // uint32_t lsdaIndexArraySectionOffset; + // }; + + bool clear_address_zeroth_bit = false; + ArchSpec arch; + if (m_objfile.GetArchitecture(arch)) { + if (arch.GetTriple().getArch() == llvm::Triple::arm || + arch.GetTriple().getArch() == llvm::Triple::thumb) + clear_address_zeroth_bit = true; + } - if (second_level_offset > m_section_sp->GetByteSize() || lsda_offset > m_section_sp->GetByteSize()) - { - m_indexes_computed = eLazyBoolNo; - } + offset = indexSectionOffset; + for (uint32_t idx = 0; idx < indexCount; idx++) { + uint32_t function_offset = + m_unwindinfo_data.GetU32(&offset); // functionOffset + uint32_t second_level_offset = + m_unwindinfo_data.GetU32(&offset); // secondLevelPagesSectionOffset + uint32_t lsda_offset = + m_unwindinfo_data.GetU32(&offset); // lsdaIndexArraySectionOffset + + if (second_level_offset > m_section_sp->GetByteSize() || + lsda_offset > m_section_sp->GetByteSize()) { + m_indexes_computed = eLazyBoolNo; + } - if (clear_address_zeroth_bit) - function_offset &= ~1ull; + if (clear_address_zeroth_bit) + function_offset &= ~1ull; - UnwindIndex this_index; - this_index.function_offset = function_offset; - this_index.second_level = second_level_offset; - this_index.lsda_array_start = lsda_offset; + UnwindIndex this_index; + this_index.function_offset = function_offset; + this_index.second_level = second_level_offset; + this_index.lsda_array_start = lsda_offset; - if (m_indexes.size() > 0) - { - m_indexes[m_indexes.size() - 1].lsda_array_end = lsda_offset; - } + if (m_indexes.size() > 0) { + m_indexes[m_indexes.size() - 1].lsda_array_end = lsda_offset; + } - if (second_level_offset == 0) - { - this_index.sentinal_entry = true; - } + if (second_level_offset == 0) { + this_index.sentinal_entry = true; + } - m_indexes.push_back (this_index); - } - m_indexes_computed = eLazyBoolYes; - } - else - { - m_indexes_computed = eLazyBoolNo; + m_indexes.push_back(this_index); } + m_indexes_computed = eLazyBoolYes; + } else { + m_indexes_computed = eLazyBoolNo; + } } -uint32_t -CompactUnwindInfo::GetLSDAForFunctionOffset (uint32_t lsda_offset, uint32_t lsda_count, uint32_t function_offset) -{ - // struct unwind_info_section_header_lsda_index_entry - // { - // uint32_t functionOffset; - // uint32_t lsdaOffset; - // }; - - offset_t first_entry = lsda_offset; - uint32_t low = 0; - uint32_t high = lsda_count; - while (low < high) - { - uint32_t mid = (low + high) / 2; - offset_t offset = first_entry + (mid * 8); - uint32_t mid_func_offset = m_unwindinfo_data.GetU32(&offset); // functionOffset - uint32_t mid_lsda_offset = m_unwindinfo_data.GetU32(&offset); // lsdaOffset - if (mid_func_offset == function_offset) - { - return mid_lsda_offset; - } - if (mid_func_offset < function_offset) - { - low = mid + 1; - } - else - { - high = mid; - } +uint32_t CompactUnwindInfo::GetLSDAForFunctionOffset(uint32_t lsda_offset, + uint32_t lsda_count, + uint32_t function_offset) { + // struct unwind_info_section_header_lsda_index_entry + // { + // uint32_t functionOffset; + // uint32_t lsdaOffset; + // }; + + offset_t first_entry = lsda_offset; + uint32_t low = 0; + uint32_t high = lsda_count; + while (low < high) { + uint32_t mid = (low + high) / 2; + offset_t offset = first_entry + (mid * 8); + uint32_t mid_func_offset = + m_unwindinfo_data.GetU32(&offset); // functionOffset + uint32_t mid_lsda_offset = m_unwindinfo_data.GetU32(&offset); // lsdaOffset + if (mid_func_offset == function_offset) { + return mid_lsda_offset; } - return 0; + if (mid_func_offset < function_offset) { + low = mid + 1; + } else { + high = mid; + } + } + return 0; } -lldb::offset_t -CompactUnwindInfo::BinarySearchRegularSecondPage (uint32_t entry_page_offset, uint32_t entry_count, uint32_t function_offset, uint32_t *entry_func_start_offset, uint32_t *entry_func_end_offset) -{ - // typedef uint32_t compact_unwind_encoding_t; - // struct unwind_info_regular_second_level_entry - // { - // uint32_t functionOffset; - // compact_unwind_encoding_t encoding; - - offset_t first_entry = entry_page_offset; - - uint32_t low = 0; - uint32_t high = entry_count; - uint32_t last = high - 1; - while (low < high) - { - uint32_t mid = (low + high) / 2; - offset_t offset = first_entry + (mid * 8); - uint32_t mid_func_offset = m_unwindinfo_data.GetU32(&offset); // functionOffset - uint32_t next_func_offset = 0; - if (mid < last) - { - offset = first_entry + ((mid + 1) * 8); - next_func_offset = m_unwindinfo_data.GetU32(&offset); // functionOffset - } - if (mid_func_offset <= function_offset) - { - if (mid == last || (next_func_offset > function_offset)) - { - if (entry_func_start_offset) - *entry_func_start_offset = mid_func_offset; - if (mid != last && entry_func_end_offset) - *entry_func_end_offset = next_func_offset; - return first_entry + (mid * 8); - } - else - { - low = mid + 1; - } - } - else - { - high = mid; - } +lldb::offset_t CompactUnwindInfo::BinarySearchRegularSecondPage( + uint32_t entry_page_offset, uint32_t entry_count, uint32_t function_offset, + uint32_t *entry_func_start_offset, uint32_t *entry_func_end_offset) { + // typedef uint32_t compact_unwind_encoding_t; + // struct unwind_info_regular_second_level_entry + // { + // uint32_t functionOffset; + // compact_unwind_encoding_t encoding; + + offset_t first_entry = entry_page_offset; + + uint32_t low = 0; + uint32_t high = entry_count; + uint32_t last = high - 1; + while (low < high) { + uint32_t mid = (low + high) / 2; + offset_t offset = first_entry + (mid * 8); + uint32_t mid_func_offset = + m_unwindinfo_data.GetU32(&offset); // functionOffset + uint32_t next_func_offset = 0; + if (mid < last) { + offset = first_entry + ((mid + 1) * 8); + next_func_offset = m_unwindinfo_data.GetU32(&offset); // functionOffset } - return LLDB_INVALID_OFFSET; + if (mid_func_offset <= function_offset) { + if (mid == last || (next_func_offset > function_offset)) { + if (entry_func_start_offset) + *entry_func_start_offset = mid_func_offset; + if (mid != last && entry_func_end_offset) + *entry_func_end_offset = next_func_offset; + return first_entry + (mid * 8); + } else { + low = mid + 1; + } + } else { + high = mid; + } + } + return LLDB_INVALID_OFFSET; } -uint32_t -CompactUnwindInfo::BinarySearchCompressedSecondPage (uint32_t entry_page_offset, uint32_t entry_count, uint32_t function_offset_to_find, uint32_t function_offset_base, uint32_t *entry_func_start_offset, uint32_t *entry_func_end_offset) -{ - offset_t first_entry = entry_page_offset; - - uint32_t low = 0; - uint32_t high = entry_count; - uint32_t last = high - 1; - while (low < high) - { - uint32_t mid = (low + high) / 2; - offset_t offset = first_entry + (mid * 4); - uint32_t entry = m_unwindinfo_data.GetU32(&offset); // entry - uint32_t mid_func_offset = UNWIND_INFO_COMPRESSED_ENTRY_FUNC_OFFSET (entry); - mid_func_offset += function_offset_base; - uint32_t next_func_offset = 0; - if (mid < last) - { - offset = first_entry + ((mid + 1) * 4); - uint32_t next_entry = m_unwindinfo_data.GetU32(&offset); // entry - next_func_offset = UNWIND_INFO_COMPRESSED_ENTRY_FUNC_OFFSET (next_entry); - next_func_offset += function_offset_base; - } - if (mid_func_offset <= function_offset_to_find) - { - if (mid == last || (next_func_offset > function_offset_to_find)) - { - if (entry_func_start_offset) - *entry_func_start_offset = mid_func_offset; - if (mid != last && entry_func_end_offset) - *entry_func_end_offset = next_func_offset; - return UNWIND_INFO_COMPRESSED_ENTRY_ENCODING_INDEX (entry); - } - else - { - low = mid + 1; - } - } - else - { - high = mid; - } +uint32_t CompactUnwindInfo::BinarySearchCompressedSecondPage( + uint32_t entry_page_offset, uint32_t entry_count, + uint32_t function_offset_to_find, uint32_t function_offset_base, + uint32_t *entry_func_start_offset, uint32_t *entry_func_end_offset) { + offset_t first_entry = entry_page_offset; + + uint32_t low = 0; + uint32_t high = entry_count; + uint32_t last = high - 1; + while (low < high) { + uint32_t mid = (low + high) / 2; + offset_t offset = first_entry + (mid * 4); + uint32_t entry = m_unwindinfo_data.GetU32(&offset); // entry + uint32_t mid_func_offset = UNWIND_INFO_COMPRESSED_ENTRY_FUNC_OFFSET(entry); + mid_func_offset += function_offset_base; + uint32_t next_func_offset = 0; + if (mid < last) { + offset = first_entry + ((mid + 1) * 4); + uint32_t next_entry = m_unwindinfo_data.GetU32(&offset); // entry + next_func_offset = UNWIND_INFO_COMPRESSED_ENTRY_FUNC_OFFSET(next_entry); + next_func_offset += function_offset_base; + } + if (mid_func_offset <= function_offset_to_find) { + if (mid == last || (next_func_offset > function_offset_to_find)) { + if (entry_func_start_offset) + *entry_func_start_offset = mid_func_offset; + if (mid != last && entry_func_end_offset) + *entry_func_end_offset = next_func_offset; + return UNWIND_INFO_COMPRESSED_ENTRY_ENCODING_INDEX(entry); + } else { + low = mid + 1; + } + } else { + high = mid; } + } - return UINT32_MAX; + return UINT32_MAX; } -bool -CompactUnwindInfo::GetCompactUnwindInfoForFunction (Target &target, Address address, FunctionInfo &unwind_info) -{ - unwind_info.encoding = 0; - unwind_info.lsda_address.Clear(); - unwind_info.personality_ptr_address.Clear(); +bool CompactUnwindInfo::GetCompactUnwindInfoForFunction( + Target &target, Address address, FunctionInfo &unwind_info) { + unwind_info.encoding = 0; + unwind_info.lsda_address.Clear(); + unwind_info.personality_ptr_address.Clear(); - if (!IsValid (target.GetProcessSP())) - return false; + if (!IsValid(target.GetProcessSP())) + return false; - addr_t text_section_file_address = LLDB_INVALID_ADDRESS; - SectionList *sl = m_objfile.GetSectionList (); - if (sl) - { - SectionSP text_sect = sl->FindSectionByType (eSectionTypeCode, true); - if (text_sect.get()) - { - text_section_file_address = text_sect->GetFileAddress(); - } + addr_t text_section_file_address = LLDB_INVALID_ADDRESS; + SectionList *sl = m_objfile.GetSectionList(); + if (sl) { + SectionSP text_sect = sl->FindSectionByType(eSectionTypeCode, true); + if (text_sect.get()) { + text_section_file_address = text_sect->GetFileAddress(); } - if (text_section_file_address == LLDB_INVALID_ADDRESS) - return false; + } + if (text_section_file_address == LLDB_INVALID_ADDRESS) + return false; - addr_t function_offset = address.GetFileAddress() - m_objfile.GetHeaderAddress().GetFileAddress(); + addr_t function_offset = + address.GetFileAddress() - m_objfile.GetHeaderAddress().GetFileAddress(); - UnwindIndex key; - key.function_offset = function_offset; + UnwindIndex key; + key.function_offset = function_offset; - std::vector<UnwindIndex>::const_iterator it; - it = std::lower_bound (m_indexes.begin(), m_indexes.end(), key); - if (it == m_indexes.end()) - { - return false; - } + std::vector<UnwindIndex>::const_iterator it; + it = std::lower_bound(m_indexes.begin(), m_indexes.end(), key); + if (it == m_indexes.end()) { + return false; + } - if (it->function_offset != key.function_offset) - { - if (it != m_indexes.begin()) - --it; - } + if (it->function_offset != key.function_offset) { + if (it != m_indexes.begin()) + --it; + } - if (it->sentinal_entry == true) - { - return false; - } + if (it->sentinal_entry == true) { + return false; + } + + auto next_it = it + 1; + if (next_it != m_indexes.end()) { + // initialize the function offset end range to be the start of the + // next index offset. If we find an entry which is at the end of + // the index table, this will establish the range end. + unwind_info.valid_range_offset_end = next_it->function_offset; + } + + offset_t second_page_offset = it->second_level; + offset_t lsda_array_start = it->lsda_array_start; + offset_t lsda_array_count = (it->lsda_array_end - it->lsda_array_start) / 8; + + offset_t offset = second_page_offset; + uint32_t kind = m_unwindinfo_data.GetU32( + &offset); // UNWIND_SECOND_LEVEL_REGULAR or UNWIND_SECOND_LEVEL_COMPRESSED + + if (kind == UNWIND_SECOND_LEVEL_REGULAR) { + // struct unwind_info_regular_second_level_page_header + // { + // uint32_t kind; // UNWIND_SECOND_LEVEL_REGULAR + // uint16_t entryPageOffset; + // uint16_t entryCount; - auto next_it = it + 1; - if (next_it != m_indexes.end()) - { - // initialize the function offset end range to be the start of the - // next index offset. If we find an entry which is at the end of - // the index table, this will establish the range end. - unwind_info.valid_range_offset_end = next_it->function_offset; - } + // typedef uint32_t compact_unwind_encoding_t; + // struct unwind_info_regular_second_level_entry + // { + // uint32_t functionOffset; + // compact_unwind_encoding_t encoding; - offset_t second_page_offset = it->second_level; - offset_t lsda_array_start = it->lsda_array_start; - offset_t lsda_array_count = (it->lsda_array_end - it->lsda_array_start) / 8; - - offset_t offset = second_page_offset; - uint32_t kind = m_unwindinfo_data.GetU32(&offset); // UNWIND_SECOND_LEVEL_REGULAR or UNWIND_SECOND_LEVEL_COMPRESSED - - if (kind == UNWIND_SECOND_LEVEL_REGULAR) - { - // struct unwind_info_regular_second_level_page_header - // { - // uint32_t kind; // UNWIND_SECOND_LEVEL_REGULAR - // uint16_t entryPageOffset; - // uint16_t entryCount; - - // typedef uint32_t compact_unwind_encoding_t; - // struct unwind_info_regular_second_level_entry - // { - // uint32_t functionOffset; - // compact_unwind_encoding_t encoding; - - uint16_t entry_page_offset = m_unwindinfo_data.GetU16(&offset); // entryPageOffset - uint16_t entry_count = m_unwindinfo_data.GetU16(&offset); // entryCount - - offset_t entry_offset = BinarySearchRegularSecondPage (second_page_offset + entry_page_offset, entry_count, function_offset, &unwind_info.valid_range_offset_start, &unwind_info.valid_range_offset_end); - if (entry_offset == LLDB_INVALID_OFFSET) - { - return false; - } - entry_offset += 4; // skip over functionOffset - unwind_info.encoding = m_unwindinfo_data.GetU32(&entry_offset); // encoding - if (unwind_info.encoding & UNWIND_HAS_LSDA) - { - SectionList *sl = m_objfile.GetSectionList (); - if (sl) - { - uint32_t lsda_offset = GetLSDAForFunctionOffset (lsda_array_start, lsda_array_count, function_offset); - addr_t objfile_header_file_address = m_objfile.GetHeaderAddress().GetFileAddress(); - unwind_info.lsda_address.ResolveAddressUsingFileSections (objfile_header_file_address + lsda_offset, sl); - } - } - if (unwind_info.encoding & UNWIND_PERSONALITY_MASK) - { - uint32_t personality_index = EXTRACT_BITS (unwind_info.encoding, UNWIND_PERSONALITY_MASK); - - if (personality_index > 0) - { - personality_index--; - if (personality_index < m_unwind_header.personality_array_count) - { - offset_t offset = m_unwind_header.personality_array_offset; - offset += 4 * personality_index; - SectionList *sl = m_objfile.GetSectionList (); - if (sl) - { - uint32_t personality_offset = m_unwindinfo_data.GetU32(&offset); - addr_t objfile_header_file_address = m_objfile.GetHeaderAddress().GetFileAddress(); - unwind_info.personality_ptr_address.ResolveAddressUsingFileSections (objfile_header_file_address + personality_offset, sl); - } - } - } - } - return true; - } - else if (kind == UNWIND_SECOND_LEVEL_COMPRESSED) - { - // struct unwind_info_compressed_second_level_page_header - // { - // uint32_t kind; // UNWIND_SECOND_LEVEL_COMPRESSED - // uint16_t entryPageOffset; // offset from this 2nd lvl page idx to array of entries - // // (an entry has a function offset and index into the encodings) - // // NB function offset from the entry in the compressed page - // // must be added to the index's functionOffset value. - // uint16_t entryCount; - // uint16_t encodingsPageOffset; // offset from this 2nd lvl page idx to array of encodings - // uint16_t encodingsCount; - - uint16_t entry_page_offset = m_unwindinfo_data.GetU16(&offset); // entryPageOffset - uint16_t entry_count = m_unwindinfo_data.GetU16(&offset); // entryCount - uint16_t encodings_page_offset = m_unwindinfo_data.GetU16(&offset); // encodingsPageOffset - uint16_t encodings_count = m_unwindinfo_data.GetU16(&offset); // encodingsCount - - uint32_t encoding_index = BinarySearchCompressedSecondPage (second_page_offset + entry_page_offset, entry_count, function_offset, it->function_offset, &unwind_info.valid_range_offset_start, &unwind_info.valid_range_offset_end); - if (encoding_index == UINT32_MAX || encoding_index >= encodings_count + m_unwind_header.common_encodings_array_count) - { - return false; - } - uint32_t encoding = 0; - if (encoding_index < m_unwind_header.common_encodings_array_count) - { - offset = m_unwind_header.common_encodings_array_offset + (encoding_index * sizeof (uint32_t)); - encoding = m_unwindinfo_data.GetU32(&offset); // encoding entry from the commonEncodingsArray - } - else - { - uint32_t page_specific_entry_index = encoding_index - m_unwind_header.common_encodings_array_count; - offset = second_page_offset + encodings_page_offset + (page_specific_entry_index * sizeof (uint32_t)); - encoding = m_unwindinfo_data.GetU32(&offset); // encoding entry from the page-specific encoding array - } - if (encoding == 0) - return false; + uint16_t entry_page_offset = + m_unwindinfo_data.GetU16(&offset); // entryPageOffset + uint16_t entry_count = m_unwindinfo_data.GetU16(&offset); // entryCount - unwind_info.encoding = encoding; - if (unwind_info.encoding & UNWIND_HAS_LSDA) - { - SectionList *sl = m_objfile.GetSectionList (); - if (sl) - { - uint32_t lsda_offset = GetLSDAForFunctionOffset (lsda_array_start, lsda_array_count, function_offset); - addr_t objfile_header_file_address = m_objfile.GetHeaderAddress().GetFileAddress(); - unwind_info.lsda_address.ResolveAddressUsingFileSections (objfile_header_file_address + lsda_offset, sl); - } + offset_t entry_offset = BinarySearchRegularSecondPage( + second_page_offset + entry_page_offset, entry_count, function_offset, + &unwind_info.valid_range_offset_start, + &unwind_info.valid_range_offset_end); + if (entry_offset == LLDB_INVALID_OFFSET) { + return false; + } + entry_offset += 4; // skip over functionOffset + unwind_info.encoding = m_unwindinfo_data.GetU32(&entry_offset); // encoding + if (unwind_info.encoding & UNWIND_HAS_LSDA) { + SectionList *sl = m_objfile.GetSectionList(); + if (sl) { + uint32_t lsda_offset = GetLSDAForFunctionOffset( + lsda_array_start, lsda_array_count, function_offset); + addr_t objfile_header_file_address = + m_objfile.GetHeaderAddress().GetFileAddress(); + unwind_info.lsda_address.ResolveAddressUsingFileSections( + objfile_header_file_address + lsda_offset, sl); + } + } + if (unwind_info.encoding & UNWIND_PERSONALITY_MASK) { + uint32_t personality_index = + EXTRACT_BITS(unwind_info.encoding, UNWIND_PERSONALITY_MASK); + + if (personality_index > 0) { + personality_index--; + if (personality_index < m_unwind_header.personality_array_count) { + offset_t offset = m_unwind_header.personality_array_offset; + offset += 4 * personality_index; + SectionList *sl = m_objfile.GetSectionList(); + if (sl) { + uint32_t personality_offset = m_unwindinfo_data.GetU32(&offset); + addr_t objfile_header_file_address = + m_objfile.GetHeaderAddress().GetFileAddress(); + unwind_info.personality_ptr_address.ResolveAddressUsingFileSections( + objfile_header_file_address + personality_offset, sl); + } } - if (unwind_info.encoding & UNWIND_PERSONALITY_MASK) - { - uint32_t personality_index = EXTRACT_BITS (unwind_info.encoding, UNWIND_PERSONALITY_MASK); - - if (personality_index > 0) - { - personality_index--; - if (personality_index < m_unwind_header.personality_array_count) - { - offset_t offset = m_unwind_header.personality_array_offset; - offset += 4 * personality_index; - SectionList *sl = m_objfile.GetSectionList (); - if (sl) - { - uint32_t personality_offset = m_unwindinfo_data.GetU32(&offset); - addr_t objfile_header_file_address = m_objfile.GetHeaderAddress().GetFileAddress(); - unwind_info.personality_ptr_address.ResolveAddressUsingFileSections (objfile_header_file_address + personality_offset, sl); - } - } - } + } + } + return true; + } else if (kind == UNWIND_SECOND_LEVEL_COMPRESSED) { + // struct unwind_info_compressed_second_level_page_header + // { + // uint32_t kind; // UNWIND_SECOND_LEVEL_COMPRESSED + // uint16_t entryPageOffset; // offset from this 2nd lvl page + // idx to array of entries + // // (an entry has a function + // offset and index into the + // encodings) + // // NB function offset from the + // entry in the compressed page + // // must be added to the index's + // functionOffset value. + // uint16_t entryCount; + // uint16_t encodingsPageOffset; // offset from this 2nd lvl page + // idx to array of encodings + // uint16_t encodingsCount; + + uint16_t entry_page_offset = + m_unwindinfo_data.GetU16(&offset); // entryPageOffset + uint16_t entry_count = m_unwindinfo_data.GetU16(&offset); // entryCount + uint16_t encodings_page_offset = + m_unwindinfo_data.GetU16(&offset); // encodingsPageOffset + uint16_t encodings_count = + m_unwindinfo_data.GetU16(&offset); // encodingsCount + + uint32_t encoding_index = BinarySearchCompressedSecondPage( + second_page_offset + entry_page_offset, entry_count, function_offset, + it->function_offset, &unwind_info.valid_range_offset_start, + &unwind_info.valid_range_offset_end); + if (encoding_index == UINT32_MAX || + encoding_index >= + encodings_count + m_unwind_header.common_encodings_array_count) { + return false; + } + uint32_t encoding = 0; + if (encoding_index < m_unwind_header.common_encodings_array_count) { + offset = m_unwind_header.common_encodings_array_offset + + (encoding_index * sizeof(uint32_t)); + encoding = m_unwindinfo_data.GetU32( + &offset); // encoding entry from the commonEncodingsArray + } else { + uint32_t page_specific_entry_index = + encoding_index - m_unwind_header.common_encodings_array_count; + offset = second_page_offset + encodings_page_offset + + (page_specific_entry_index * sizeof(uint32_t)); + encoding = m_unwindinfo_data.GetU32( + &offset); // encoding entry from the page-specific encoding array + } + if (encoding == 0) + return false; + + unwind_info.encoding = encoding; + if (unwind_info.encoding & UNWIND_HAS_LSDA) { + SectionList *sl = m_objfile.GetSectionList(); + if (sl) { + uint32_t lsda_offset = GetLSDAForFunctionOffset( + lsda_array_start, lsda_array_count, function_offset); + addr_t objfile_header_file_address = + m_objfile.GetHeaderAddress().GetFileAddress(); + unwind_info.lsda_address.ResolveAddressUsingFileSections( + objfile_header_file_address + lsda_offset, sl); + } + } + if (unwind_info.encoding & UNWIND_PERSONALITY_MASK) { + uint32_t personality_index = + EXTRACT_BITS(unwind_info.encoding, UNWIND_PERSONALITY_MASK); + + if (personality_index > 0) { + personality_index--; + if (personality_index < m_unwind_header.personality_array_count) { + offset_t offset = m_unwind_header.personality_array_offset; + offset += 4 * personality_index; + SectionList *sl = m_objfile.GetSectionList(); + if (sl) { + uint32_t personality_offset = m_unwindinfo_data.GetU32(&offset); + addr_t objfile_header_file_address = + m_objfile.GetHeaderAddress().GetFileAddress(); + unwind_info.personality_ptr_address.ResolveAddressUsingFileSections( + objfile_header_file_address + personality_offset, sl); + } } - return true; + } } - return false; + return true; + } + return false; } enum x86_64_eh_regnum { - rax = 0, - rdx = 1, - rcx = 2, - rbx = 3, - rsi = 4, - rdi = 5, - rbp = 6, - rsp = 7, - r8 = 8, - r9 = 9, - r10 = 10, - r11 = 11, - r12 = 12, - r13 = 13, - r14 = 14, - r15 = 15, - rip = 16 // this is officially the Return Address register number, but close enough + rax = 0, + rdx = 1, + rcx = 2, + rbx = 3, + rsi = 4, + rdi = 5, + rbp = 6, + rsp = 7, + r8 = 8, + r9 = 9, + r10 = 10, + r11 = 11, + r12 = 12, + r13 = 13, + r14 = 14, + r15 = 15, + rip = 16 // this is officially the Return Address register number, but close + // enough }; // Convert the compact_unwind_info.h register numbering scheme // to eRegisterKindEHFrame (eh_frame) register numbering scheme. -uint32_t -translate_to_eh_frame_regnum_x86_64 (uint32_t unwind_regno) -{ - switch (unwind_regno) - { - case UNWIND_X86_64_REG_RBX: - return x86_64_eh_regnum::rbx; - case UNWIND_X86_64_REG_R12: - return x86_64_eh_regnum::r12; - case UNWIND_X86_64_REG_R13: - return x86_64_eh_regnum::r13; - case UNWIND_X86_64_REG_R14: - return x86_64_eh_regnum::r14; - case UNWIND_X86_64_REG_R15: - return x86_64_eh_regnum::r15; - case UNWIND_X86_64_REG_RBP: - return x86_64_eh_regnum::rbp; - default: - return LLDB_INVALID_REGNUM; - } +uint32_t translate_to_eh_frame_regnum_x86_64(uint32_t unwind_regno) { + switch (unwind_regno) { + case UNWIND_X86_64_REG_RBX: + return x86_64_eh_regnum::rbx; + case UNWIND_X86_64_REG_R12: + return x86_64_eh_regnum::r12; + case UNWIND_X86_64_REG_R13: + return x86_64_eh_regnum::r13; + case UNWIND_X86_64_REG_R14: + return x86_64_eh_regnum::r14; + case UNWIND_X86_64_REG_R15: + return x86_64_eh_regnum::r15; + case UNWIND_X86_64_REG_RBP: + return x86_64_eh_regnum::rbp; + default: + return LLDB_INVALID_REGNUM; + } } -bool -CompactUnwindInfo::CreateUnwindPlan_x86_64 (Target &target, FunctionInfo &function_info, UnwindPlan &unwind_plan, Address pc_or_function_start) -{ - unwind_plan.SetSourceName ("compact unwind info"); - unwind_plan.SetSourcedFromCompiler (eLazyBoolYes); - unwind_plan.SetUnwindPlanValidAtAllInstructions (eLazyBoolNo); - unwind_plan.SetRegisterKind (eRegisterKindEHFrame); - - unwind_plan.SetLSDAAddress (function_info.lsda_address); - unwind_plan.SetPersonalityFunctionPtr (function_info.personality_ptr_address); - - UnwindPlan::RowSP row (new UnwindPlan::Row); - - const int wordsize = 8; - int mode = function_info.encoding & UNWIND_X86_64_MODE_MASK; - switch (mode) - { - case UNWIND_X86_64_MODE_RBP_FRAME: - { - row->GetCFAValue().SetIsRegisterPlusOffset ( - translate_to_eh_frame_regnum_x86_64 (UNWIND_X86_64_REG_RBP), - 2 * wordsize); - row->SetOffset (0); - row->SetRegisterLocationToAtCFAPlusOffset (x86_64_eh_regnum::rbp, wordsize * -2, true); - row->SetRegisterLocationToAtCFAPlusOffset (x86_64_eh_regnum::rip, wordsize * -1, true); - row->SetRegisterLocationToIsCFAPlusOffset (x86_64_eh_regnum::rsp, 0, true); - - uint32_t saved_registers_offset = EXTRACT_BITS (function_info.encoding, UNWIND_X86_64_RBP_FRAME_OFFSET); - - uint32_t saved_registers_locations = EXTRACT_BITS (function_info.encoding, UNWIND_X86_64_RBP_FRAME_REGISTERS); - - saved_registers_offset += 2; - - for (int i = 0; i < 5; i++) - { - uint32_t regnum = saved_registers_locations & 0x7; - switch (regnum) - { - case UNWIND_X86_64_REG_NONE: - break; - case UNWIND_X86_64_REG_RBX: - case UNWIND_X86_64_REG_R12: - case UNWIND_X86_64_REG_R13: - case UNWIND_X86_64_REG_R14: - case UNWIND_X86_64_REG_R15: - row->SetRegisterLocationToAtCFAPlusOffset (translate_to_eh_frame_regnum_x86_64 (regnum), wordsize * -saved_registers_offset, true); - break; - } - saved_registers_offset--; - saved_registers_locations >>= 3; - } - unwind_plan.AppendRow (row); - return true; - } +bool CompactUnwindInfo::CreateUnwindPlan_x86_64(Target &target, + FunctionInfo &function_info, + UnwindPlan &unwind_plan, + Address pc_or_function_start) { + unwind_plan.SetSourceName("compact unwind info"); + unwind_plan.SetSourcedFromCompiler(eLazyBoolYes); + unwind_plan.SetUnwindPlanValidAtAllInstructions(eLazyBoolNo); + unwind_plan.SetRegisterKind(eRegisterKindEHFrame); + + unwind_plan.SetLSDAAddress(function_info.lsda_address); + unwind_plan.SetPersonalityFunctionPtr(function_info.personality_ptr_address); + + UnwindPlan::RowSP row(new UnwindPlan::Row); + + const int wordsize = 8; + int mode = function_info.encoding & UNWIND_X86_64_MODE_MASK; + switch (mode) { + case UNWIND_X86_64_MODE_RBP_FRAME: { + row->GetCFAValue().SetIsRegisterPlusOffset( + translate_to_eh_frame_regnum_x86_64(UNWIND_X86_64_REG_RBP), + 2 * wordsize); + row->SetOffset(0); + row->SetRegisterLocationToAtCFAPlusOffset(x86_64_eh_regnum::rbp, + wordsize * -2, true); + row->SetRegisterLocationToAtCFAPlusOffset(x86_64_eh_regnum::rip, + wordsize * -1, true); + row->SetRegisterLocationToIsCFAPlusOffset(x86_64_eh_regnum::rsp, 0, true); + + uint32_t saved_registers_offset = + EXTRACT_BITS(function_info.encoding, UNWIND_X86_64_RBP_FRAME_OFFSET); + + uint32_t saved_registers_locations = + EXTRACT_BITS(function_info.encoding, UNWIND_X86_64_RBP_FRAME_REGISTERS); + + saved_registers_offset += 2; + + for (int i = 0; i < 5; i++) { + uint32_t regnum = saved_registers_locations & 0x7; + switch (regnum) { + case UNWIND_X86_64_REG_NONE: + break; + case UNWIND_X86_64_REG_RBX: + case UNWIND_X86_64_REG_R12: + case UNWIND_X86_64_REG_R13: + case UNWIND_X86_64_REG_R14: + case UNWIND_X86_64_REG_R15: + row->SetRegisterLocationToAtCFAPlusOffset( + translate_to_eh_frame_regnum_x86_64(regnum), + wordsize * -saved_registers_offset, true); break; + } + saved_registers_offset--; + saved_registers_locations >>= 3; + } + unwind_plan.AppendRow(row); + return true; + } break; - case UNWIND_X86_64_MODE_STACK_IND: - { - // The clang in Xcode 6 is emitting incorrect compact unwind encodings for this - // style of unwind. It was fixed in llvm r217020. - // The clang in Xcode 7 has this fixed. + case UNWIND_X86_64_MODE_STACK_IND: { + // The clang in Xcode 6 is emitting incorrect compact unwind encodings for + // this + // style of unwind. It was fixed in llvm r217020. + // The clang in Xcode 7 has this fixed. + return false; + } break; + + case UNWIND_X86_64_MODE_STACK_IMMD: { + uint32_t stack_size = EXTRACT_BITS(function_info.encoding, + UNWIND_X86_64_FRAMELESS_STACK_SIZE); + uint32_t register_count = EXTRACT_BITS( + function_info.encoding, UNWIND_X86_64_FRAMELESS_STACK_REG_COUNT); + uint32_t permutation = EXTRACT_BITS( + function_info.encoding, UNWIND_X86_64_FRAMELESS_STACK_REG_PERMUTATION); + + if (mode == UNWIND_X86_64_MODE_STACK_IND && + function_info.valid_range_offset_start != 0) { + uint32_t stack_adjust = EXTRACT_BITS( + function_info.encoding, UNWIND_X86_64_FRAMELESS_STACK_ADJUST); + + // offset into the function instructions; 0 == beginning of first + // instruction + uint32_t offset_to_subl_insn = EXTRACT_BITS( + function_info.encoding, UNWIND_X86_64_FRAMELESS_STACK_SIZE); + + SectionList *sl = m_objfile.GetSectionList(); + if (sl) { + ProcessSP process_sp = target.GetProcessSP(); + if (process_sp) { + Address subl_payload_addr(function_info.valid_range_offset_start, sl); + subl_payload_addr.Slide(offset_to_subl_insn); + Error error; + uint64_t large_stack_size = process_sp->ReadUnsignedIntegerFromMemory( + subl_payload_addr.GetLoadAddress(&target), 4, 0, error); + if (large_stack_size != 0 && error.Success()) { + // Got the large stack frame size correctly - use it + stack_size = large_stack_size + (stack_adjust * wordsize); + } else { return false; + } + } else { + return false; } - break; - - case UNWIND_X86_64_MODE_STACK_IMMD: - { - uint32_t stack_size = EXTRACT_BITS (function_info.encoding, UNWIND_X86_64_FRAMELESS_STACK_SIZE); - uint32_t register_count = EXTRACT_BITS (function_info.encoding, UNWIND_X86_64_FRAMELESS_STACK_REG_COUNT); - uint32_t permutation = EXTRACT_BITS (function_info.encoding, UNWIND_X86_64_FRAMELESS_STACK_REG_PERMUTATION); - - if (mode == UNWIND_X86_64_MODE_STACK_IND && function_info.valid_range_offset_start != 0) - { - uint32_t stack_adjust = EXTRACT_BITS (function_info.encoding, UNWIND_X86_64_FRAMELESS_STACK_ADJUST); - - // offset into the function instructions; 0 == beginning of first instruction - uint32_t offset_to_subl_insn = EXTRACT_BITS (function_info.encoding, UNWIND_X86_64_FRAMELESS_STACK_SIZE); - - SectionList *sl = m_objfile.GetSectionList (); - if (sl) - { - ProcessSP process_sp = target.GetProcessSP(); - if (process_sp) - { - Address subl_payload_addr (function_info.valid_range_offset_start, sl); - subl_payload_addr.Slide (offset_to_subl_insn); - Error error; - uint64_t large_stack_size = process_sp->ReadUnsignedIntegerFromMemory (subl_payload_addr.GetLoadAddress (&target), - 4, 0, error); - if (large_stack_size != 0 && error.Success ()) - { - // Got the large stack frame size correctly - use it - stack_size = large_stack_size + (stack_adjust * wordsize); - } - else - { - return false; - } - } - else - { - return false; - } - } - else - { - return false; - } - } + } else { + return false; + } + } - int32_t offset = mode == UNWIND_X86_64_MODE_STACK_IND ? stack_size : stack_size * wordsize; - row->GetCFAValue().SetIsRegisterPlusOffset (x86_64_eh_regnum::rsp, offset); - - row->SetOffset (0); - row->SetRegisterLocationToAtCFAPlusOffset (x86_64_eh_regnum::rip, wordsize * -1, true); - row->SetRegisterLocationToIsCFAPlusOffset (x86_64_eh_regnum::rsp, 0, true); - - if (register_count > 0) - { - - // We need to include (up to) 6 registers in 10 bits. - // That would be 18 bits if we just used 3 bits per reg to indicate - // the order they're saved on the stack. - // - // This is done with Lehmer code permutation, e.g. see - // http://stackoverflow.com/questions/1506078/fast-permutation-number-permutation-mapping-algorithms - int permunreg[6] = {0, 0, 0, 0, 0, 0}; - - // This decodes the variable-base number in the 10 bits - // and gives us the Lehmer code sequence which can then - // be decoded. - - switch (register_count) - { - case 6: - permunreg[0] = permutation/120; // 120 == 5! - permutation -= (permunreg[0]*120); - permunreg[1] = permutation/24; // 24 == 4! - permutation -= (permunreg[1]*24); - permunreg[2] = permutation/6; // 6 == 3! - permutation -= (permunreg[2]*6); - permunreg[3] = permutation/2; // 2 == 2! - permutation -= (permunreg[3]*2); - permunreg[4] = permutation; // 1 == 1! - permunreg[5] = 0; - break; - case 5: - permunreg[0] = permutation/120; - permutation -= (permunreg[0]*120); - permunreg[1] = permutation/24; - permutation -= (permunreg[1]*24); - permunreg[2] = permutation/6; - permutation -= (permunreg[2]*6); - permunreg[3] = permutation/2; - permutation -= (permunreg[3]*2); - permunreg[4] = permutation; - break; - case 4: - permunreg[0] = permutation/60; - permutation -= (permunreg[0]*60); - permunreg[1] = permutation/12; - permutation -= (permunreg[1]*12); - permunreg[2] = permutation/3; - permutation -= (permunreg[2]*3); - permunreg[3] = permutation; - break; - case 3: - permunreg[0] = permutation/20; - permutation -= (permunreg[0]*20); - permunreg[1] = permutation/4; - permutation -= (permunreg[1]*4); - permunreg[2] = permutation; - break; - case 2: - permunreg[0] = permutation/5; - permutation -= (permunreg[0]*5); - permunreg[1] = permutation; - break; - case 1: - permunreg[0] = permutation; - break; - } - - // Decode the Lehmer code for this permutation of - // the registers v. http://en.wikipedia.org/wiki/Lehmer_code - - int registers[6] = { UNWIND_X86_64_REG_NONE, UNWIND_X86_64_REG_NONE, UNWIND_X86_64_REG_NONE, UNWIND_X86_64_REG_NONE, UNWIND_X86_64_REG_NONE, UNWIND_X86_64_REG_NONE }; - bool used[7] = { false, false, false, false, false, false, false }; - for (uint32_t i = 0; i < register_count; i++) - { - int renum = 0; - for (int j = 1; j < 7; j++) - { - if (used[j] == false) - { - if (renum == permunreg[i]) - { - registers[i] = j; - used[j] = true; - break; - } - renum++; - } - } - } - - uint32_t saved_registers_offset = 1; - saved_registers_offset++; - - for (int i = (sizeof (registers) / sizeof (int)) - 1; i >= 0; i--) - { - switch (registers[i]) - { - case UNWIND_X86_64_REG_NONE: - break; - case UNWIND_X86_64_REG_RBX: - case UNWIND_X86_64_REG_R12: - case UNWIND_X86_64_REG_R13: - case UNWIND_X86_64_REG_R14: - case UNWIND_X86_64_REG_R15: - case UNWIND_X86_64_REG_RBP: - row->SetRegisterLocationToAtCFAPlusOffset (translate_to_eh_frame_regnum_x86_64 (registers[i]), wordsize * -saved_registers_offset, true); - saved_registers_offset++; - break; - } - } + int32_t offset = mode == UNWIND_X86_64_MODE_STACK_IND + ? stack_size + : stack_size * wordsize; + row->GetCFAValue().SetIsRegisterPlusOffset(x86_64_eh_regnum::rsp, offset); + + row->SetOffset(0); + row->SetRegisterLocationToAtCFAPlusOffset(x86_64_eh_regnum::rip, + wordsize * -1, true); + row->SetRegisterLocationToIsCFAPlusOffset(x86_64_eh_regnum::rsp, 0, true); + + if (register_count > 0) { + + // We need to include (up to) 6 registers in 10 bits. + // That would be 18 bits if we just used 3 bits per reg to indicate + // the order they're saved on the stack. + // + // This is done with Lehmer code permutation, e.g. see + // http://stackoverflow.com/questions/1506078/fast-permutation-number-permutation-mapping-algorithms + int permunreg[6] = {0, 0, 0, 0, 0, 0}; + + // This decodes the variable-base number in the 10 bits + // and gives us the Lehmer code sequence which can then + // be decoded. + + switch (register_count) { + case 6: + permunreg[0] = permutation / 120; // 120 == 5! + permutation -= (permunreg[0] * 120); + permunreg[1] = permutation / 24; // 24 == 4! + permutation -= (permunreg[1] * 24); + permunreg[2] = permutation / 6; // 6 == 3! + permutation -= (permunreg[2] * 6); + permunreg[3] = permutation / 2; // 2 == 2! + permutation -= (permunreg[3] * 2); + permunreg[4] = permutation; // 1 == 1! + permunreg[5] = 0; + break; + case 5: + permunreg[0] = permutation / 120; + permutation -= (permunreg[0] * 120); + permunreg[1] = permutation / 24; + permutation -= (permunreg[1] * 24); + permunreg[2] = permutation / 6; + permutation -= (permunreg[2] * 6); + permunreg[3] = permutation / 2; + permutation -= (permunreg[3] * 2); + permunreg[4] = permutation; + break; + case 4: + permunreg[0] = permutation / 60; + permutation -= (permunreg[0] * 60); + permunreg[1] = permutation / 12; + permutation -= (permunreg[1] * 12); + permunreg[2] = permutation / 3; + permutation -= (permunreg[2] * 3); + permunreg[3] = permutation; + break; + case 3: + permunreg[0] = permutation / 20; + permutation -= (permunreg[0] * 20); + permunreg[1] = permutation / 4; + permutation -= (permunreg[1] * 4); + permunreg[2] = permutation; + break; + case 2: + permunreg[0] = permutation / 5; + permutation -= (permunreg[0] * 5); + permunreg[1] = permutation; + break; + case 1: + permunreg[0] = permutation; + break; + } + + // Decode the Lehmer code for this permutation of + // the registers v. http://en.wikipedia.org/wiki/Lehmer_code + + int registers[6] = {UNWIND_X86_64_REG_NONE, UNWIND_X86_64_REG_NONE, + UNWIND_X86_64_REG_NONE, UNWIND_X86_64_REG_NONE, + UNWIND_X86_64_REG_NONE, UNWIND_X86_64_REG_NONE}; + bool used[7] = {false, false, false, false, false, false, false}; + for (uint32_t i = 0; i < register_count; i++) { + int renum = 0; + for (int j = 1; j < 7; j++) { + if (used[j] == false) { + if (renum == permunreg[i]) { + registers[i] = j; + used[j] = true; + break; } - unwind_plan.AppendRow (row); - return true; + renum++; + } } - break; + } - case UNWIND_X86_64_MODE_DWARF: - { - return false; - } - break; + uint32_t saved_registers_offset = 1; + saved_registers_offset++; - case 0: - { - return false; + for (int i = (sizeof(registers) / sizeof(int)) - 1; i >= 0; i--) { + switch (registers[i]) { + case UNWIND_X86_64_REG_NONE: + break; + case UNWIND_X86_64_REG_RBX: + case UNWIND_X86_64_REG_R12: + case UNWIND_X86_64_REG_R13: + case UNWIND_X86_64_REG_R14: + case UNWIND_X86_64_REG_R15: + case UNWIND_X86_64_REG_RBP: + row->SetRegisterLocationToAtCFAPlusOffset( + translate_to_eh_frame_regnum_x86_64(registers[i]), + wordsize * -saved_registers_offset, true); + saved_registers_offset++; + break; } - break; + } } + unwind_plan.AppendRow(row); + return true; + } break; + + case UNWIND_X86_64_MODE_DWARF: { + return false; + } break; + + case 0: { return false; + } break; + } + return false; } enum i386_eh_regnum { - eax = 0, - ecx = 1, - edx = 2, - ebx = 3, - ebp = 4, - esp = 5, - esi = 6, - edi = 7, - eip = 8 // this is officially the Return Address register number, but close enough + eax = 0, + ecx = 1, + edx = 2, + ebx = 3, + ebp = 4, + esp = 5, + esi = 6, + edi = 7, + eip = 8 // this is officially the Return Address register number, but close + // enough }; // Convert the compact_unwind_info.h register numbering scheme // to eRegisterKindEHFrame (eh_frame) register numbering scheme. -uint32_t -translate_to_eh_frame_regnum_i386 (uint32_t unwind_regno) -{ - switch (unwind_regno) - { - case UNWIND_X86_REG_EBX: - return i386_eh_regnum::ebx; - case UNWIND_X86_REG_ECX: - return i386_eh_regnum::ecx; - case UNWIND_X86_REG_EDX: - return i386_eh_regnum::edx; - case UNWIND_X86_REG_EDI: - return i386_eh_regnum::edi; - case UNWIND_X86_REG_ESI: - return i386_eh_regnum::esi; - case UNWIND_X86_REG_EBP: - return i386_eh_regnum::ebp; - default: - return LLDB_INVALID_REGNUM; - } +uint32_t translate_to_eh_frame_regnum_i386(uint32_t unwind_regno) { + switch (unwind_regno) { + case UNWIND_X86_REG_EBX: + return i386_eh_regnum::ebx; + case UNWIND_X86_REG_ECX: + return i386_eh_regnum::ecx; + case UNWIND_X86_REG_EDX: + return i386_eh_regnum::edx; + case UNWIND_X86_REG_EDI: + return i386_eh_regnum::edi; + case UNWIND_X86_REG_ESI: + return i386_eh_regnum::esi; + case UNWIND_X86_REG_EBP: + return i386_eh_regnum::ebp; + default: + return LLDB_INVALID_REGNUM; + } } - -bool -CompactUnwindInfo::CreateUnwindPlan_i386 (Target &target, FunctionInfo &function_info, UnwindPlan &unwind_plan, Address pc_or_function_start) -{ - unwind_plan.SetSourceName ("compact unwind info"); - unwind_plan.SetSourcedFromCompiler (eLazyBoolYes); - unwind_plan.SetUnwindPlanValidAtAllInstructions (eLazyBoolNo); - unwind_plan.SetRegisterKind (eRegisterKindEHFrame); - - unwind_plan.SetLSDAAddress (function_info.lsda_address); - unwind_plan.SetPersonalityFunctionPtr (function_info.personality_ptr_address); - - UnwindPlan::RowSP row (new UnwindPlan::Row); - - const int wordsize = 4; - int mode = function_info.encoding & UNWIND_X86_MODE_MASK; - switch (mode) - { - case UNWIND_X86_MODE_EBP_FRAME: - { - row->GetCFAValue().SetIsRegisterPlusOffset ( - translate_to_eh_frame_regnum_i386 (UNWIND_X86_REG_EBP), 2 * wordsize); - row->SetOffset (0); - row->SetRegisterLocationToAtCFAPlusOffset (i386_eh_regnum::ebp, wordsize * -2, true); - row->SetRegisterLocationToAtCFAPlusOffset (i386_eh_regnum::eip, wordsize * -1, true); - row->SetRegisterLocationToIsCFAPlusOffset (i386_eh_regnum::esp, 0, true); - - uint32_t saved_registers_offset = EXTRACT_BITS (function_info.encoding, UNWIND_X86_EBP_FRAME_OFFSET); - - uint32_t saved_registers_locations = EXTRACT_BITS (function_info.encoding, UNWIND_X86_EBP_FRAME_REGISTERS); - - saved_registers_offset += 2; - - for (int i = 0; i < 5; i++) - { - uint32_t regnum = saved_registers_locations & 0x7; - switch (regnum) - { - case UNWIND_X86_REG_NONE: - break; - case UNWIND_X86_REG_EBX: - case UNWIND_X86_REG_ECX: - case UNWIND_X86_REG_EDX: - case UNWIND_X86_REG_EDI: - case UNWIND_X86_REG_ESI: - row->SetRegisterLocationToAtCFAPlusOffset (translate_to_eh_frame_regnum_i386 (regnum), wordsize * -saved_registers_offset, true); - break; - } - saved_registers_offset--; - saved_registers_locations >>= 3; - } - unwind_plan.AppendRow (row); - return true; - } +bool CompactUnwindInfo::CreateUnwindPlan_i386(Target &target, + FunctionInfo &function_info, + UnwindPlan &unwind_plan, + Address pc_or_function_start) { + unwind_plan.SetSourceName("compact unwind info"); + unwind_plan.SetSourcedFromCompiler(eLazyBoolYes); + unwind_plan.SetUnwindPlanValidAtAllInstructions(eLazyBoolNo); + unwind_plan.SetRegisterKind(eRegisterKindEHFrame); + + unwind_plan.SetLSDAAddress(function_info.lsda_address); + unwind_plan.SetPersonalityFunctionPtr(function_info.personality_ptr_address); + + UnwindPlan::RowSP row(new UnwindPlan::Row); + + const int wordsize = 4; + int mode = function_info.encoding & UNWIND_X86_MODE_MASK; + switch (mode) { + case UNWIND_X86_MODE_EBP_FRAME: { + row->GetCFAValue().SetIsRegisterPlusOffset( + translate_to_eh_frame_regnum_i386(UNWIND_X86_REG_EBP), 2 * wordsize); + row->SetOffset(0); + row->SetRegisterLocationToAtCFAPlusOffset(i386_eh_regnum::ebp, + wordsize * -2, true); + row->SetRegisterLocationToAtCFAPlusOffset(i386_eh_regnum::eip, + wordsize * -1, true); + row->SetRegisterLocationToIsCFAPlusOffset(i386_eh_regnum::esp, 0, true); + + uint32_t saved_registers_offset = + EXTRACT_BITS(function_info.encoding, UNWIND_X86_EBP_FRAME_OFFSET); + + uint32_t saved_registers_locations = + EXTRACT_BITS(function_info.encoding, UNWIND_X86_EBP_FRAME_REGISTERS); + + saved_registers_offset += 2; + + for (int i = 0; i < 5; i++) { + uint32_t regnum = saved_registers_locations & 0x7; + switch (regnum) { + case UNWIND_X86_REG_NONE: break; + case UNWIND_X86_REG_EBX: + case UNWIND_X86_REG_ECX: + case UNWIND_X86_REG_EDX: + case UNWIND_X86_REG_EDI: + case UNWIND_X86_REG_ESI: + row->SetRegisterLocationToAtCFAPlusOffset( + translate_to_eh_frame_regnum_i386(regnum), + wordsize * -saved_registers_offset, true); + break; + } + saved_registers_offset--; + saved_registers_locations >>= 3; + } + unwind_plan.AppendRow(row); + return true; + } break; + + case UNWIND_X86_MODE_STACK_IND: + case UNWIND_X86_MODE_STACK_IMMD: { + uint32_t stack_size = + EXTRACT_BITS(function_info.encoding, UNWIND_X86_FRAMELESS_STACK_SIZE); + uint32_t register_count = EXTRACT_BITS( + function_info.encoding, UNWIND_X86_FRAMELESS_STACK_REG_COUNT); + uint32_t permutation = EXTRACT_BITS( + function_info.encoding, UNWIND_X86_FRAMELESS_STACK_REG_PERMUTATION); + + if (mode == UNWIND_X86_MODE_STACK_IND && + function_info.valid_range_offset_start != 0) { + uint32_t stack_adjust = EXTRACT_BITS(function_info.encoding, + UNWIND_X86_FRAMELESS_STACK_ADJUST); + + // offset into the function instructions; 0 == beginning of first + // instruction + uint32_t offset_to_subl_insn = + EXTRACT_BITS(function_info.encoding, UNWIND_X86_FRAMELESS_STACK_SIZE); + + SectionList *sl = m_objfile.GetSectionList(); + if (sl) { + ProcessSP process_sp = target.GetProcessSP(); + if (process_sp) { + Address subl_payload_addr(function_info.valid_range_offset_start, sl); + subl_payload_addr.Slide(offset_to_subl_insn); + Error error; + uint64_t large_stack_size = process_sp->ReadUnsignedIntegerFromMemory( + subl_payload_addr.GetLoadAddress(&target), 4, 0, error); + if (large_stack_size != 0 && error.Success()) { + // Got the large stack frame size correctly - use it + stack_size = large_stack_size + (stack_adjust * wordsize); + } else { + return false; + } + } else { + return false; + } + } else { + return false; + } + } - case UNWIND_X86_MODE_STACK_IND: - case UNWIND_X86_MODE_STACK_IMMD: - { - uint32_t stack_size = EXTRACT_BITS (function_info.encoding, UNWIND_X86_FRAMELESS_STACK_SIZE); - uint32_t register_count = EXTRACT_BITS (function_info.encoding, UNWIND_X86_FRAMELESS_STACK_REG_COUNT); - uint32_t permutation = EXTRACT_BITS (function_info.encoding, UNWIND_X86_FRAMELESS_STACK_REG_PERMUTATION); - - if (mode == UNWIND_X86_MODE_STACK_IND && function_info.valid_range_offset_start != 0) - { - uint32_t stack_adjust = EXTRACT_BITS (function_info.encoding, UNWIND_X86_FRAMELESS_STACK_ADJUST); - - // offset into the function instructions; 0 == beginning of first instruction - uint32_t offset_to_subl_insn = EXTRACT_BITS (function_info.encoding, UNWIND_X86_FRAMELESS_STACK_SIZE); - - SectionList *sl = m_objfile.GetSectionList (); - if (sl) - { - ProcessSP process_sp = target.GetProcessSP(); - if (process_sp) - { - Address subl_payload_addr (function_info.valid_range_offset_start, sl); - subl_payload_addr.Slide (offset_to_subl_insn); - Error error; - uint64_t large_stack_size = process_sp->ReadUnsignedIntegerFromMemory (subl_payload_addr.GetLoadAddress (&target), - 4, 0, error); - if (large_stack_size != 0 && error.Success ()) - { - // Got the large stack frame size correctly - use it - stack_size = large_stack_size + (stack_adjust * wordsize); - } - else - { - return false; - } - } - else - { - return false; - } - } - else - { - return false; - } - } - - int32_t offset = mode == UNWIND_X86_MODE_STACK_IND ? stack_size : stack_size * wordsize; - row->GetCFAValue().SetIsRegisterPlusOffset (i386_eh_regnum::esp, offset); - row->SetOffset (0); - row->SetRegisterLocationToAtCFAPlusOffset (i386_eh_regnum::eip, wordsize * -1, true); - row->SetRegisterLocationToIsCFAPlusOffset (i386_eh_regnum::esp, 0, true); - - if (register_count > 0) - { - - // We need to include (up to) 6 registers in 10 bits. - // That would be 18 bits if we just used 3 bits per reg to indicate - // the order they're saved on the stack. - // - // This is done with Lehmer code permutation, e.g. see - // http://stackoverflow.com/questions/1506078/fast-permutation-number-permutation-mapping-algorithms - int permunreg[6] = {0, 0, 0, 0, 0, 0}; - - // This decodes the variable-base number in the 10 bits - // and gives us the Lehmer code sequence which can then - // be decoded. - - switch (register_count) - { - case 6: - permunreg[0] = permutation/120; // 120 == 5! - permutation -= (permunreg[0]*120); - permunreg[1] = permutation/24; // 24 == 4! - permutation -= (permunreg[1]*24); - permunreg[2] = permutation/6; // 6 == 3! - permutation -= (permunreg[2]*6); - permunreg[3] = permutation/2; // 2 == 2! - permutation -= (permunreg[3]*2); - permunreg[4] = permutation; // 1 == 1! - permunreg[5] = 0; - break; - case 5: - permunreg[0] = permutation/120; - permutation -= (permunreg[0]*120); - permunreg[1] = permutation/24; - permutation -= (permunreg[1]*24); - permunreg[2] = permutation/6; - permutation -= (permunreg[2]*6); - permunreg[3] = permutation/2; - permutation -= (permunreg[3]*2); - permunreg[4] = permutation; - break; - case 4: - permunreg[0] = permutation/60; - permutation -= (permunreg[0]*60); - permunreg[1] = permutation/12; - permutation -= (permunreg[1]*12); - permunreg[2] = permutation/3; - permutation -= (permunreg[2]*3); - permunreg[3] = permutation; - break; - case 3: - permunreg[0] = permutation/20; - permutation -= (permunreg[0]*20); - permunreg[1] = permutation/4; - permutation -= (permunreg[1]*4); - permunreg[2] = permutation; - break; - case 2: - permunreg[0] = permutation/5; - permutation -= (permunreg[0]*5); - permunreg[1] = permutation; - break; - case 1: - permunreg[0] = permutation; - break; - } - - // Decode the Lehmer code for this permutation of - // the registers v. http://en.wikipedia.org/wiki/Lehmer_code - - int registers[6] = { UNWIND_X86_REG_NONE, UNWIND_X86_REG_NONE, UNWIND_X86_REG_NONE, UNWIND_X86_REG_NONE, UNWIND_X86_REG_NONE, UNWIND_X86_REG_NONE }; - bool used[7] = { false, false, false, false, false, false, false }; - for (uint32_t i = 0; i < register_count; i++) - { - int renum = 0; - for (int j = 1; j < 7; j++) - { - if (used[j] == false) - { - if (renum == permunreg[i]) - { - registers[i] = j; - used[j] = true; - break; - } - renum++; - } - } - } - - uint32_t saved_registers_offset = 1; - saved_registers_offset++; - - for (int i = (sizeof (registers) / sizeof (int)) - 1; i >= 0; i--) - { - switch (registers[i]) - { - case UNWIND_X86_REG_NONE: - break; - case UNWIND_X86_REG_EBX: - case UNWIND_X86_REG_ECX: - case UNWIND_X86_REG_EDX: - case UNWIND_X86_REG_EDI: - case UNWIND_X86_REG_ESI: - case UNWIND_X86_REG_EBP: - row->SetRegisterLocationToAtCFAPlusOffset (translate_to_eh_frame_regnum_i386 (registers[i]), wordsize * -saved_registers_offset, true); - saved_registers_offset++; - break; - } - } + int32_t offset = + mode == UNWIND_X86_MODE_STACK_IND ? stack_size : stack_size * wordsize; + row->GetCFAValue().SetIsRegisterPlusOffset(i386_eh_regnum::esp, offset); + row->SetOffset(0); + row->SetRegisterLocationToAtCFAPlusOffset(i386_eh_regnum::eip, + wordsize * -1, true); + row->SetRegisterLocationToIsCFAPlusOffset(i386_eh_regnum::esp, 0, true); + + if (register_count > 0) { + + // We need to include (up to) 6 registers in 10 bits. + // That would be 18 bits if we just used 3 bits per reg to indicate + // the order they're saved on the stack. + // + // This is done with Lehmer code permutation, e.g. see + // http://stackoverflow.com/questions/1506078/fast-permutation-number-permutation-mapping-algorithms + int permunreg[6] = {0, 0, 0, 0, 0, 0}; + + // This decodes the variable-base number in the 10 bits + // and gives us the Lehmer code sequence which can then + // be decoded. + + switch (register_count) { + case 6: + permunreg[0] = permutation / 120; // 120 == 5! + permutation -= (permunreg[0] * 120); + permunreg[1] = permutation / 24; // 24 == 4! + permutation -= (permunreg[1] * 24); + permunreg[2] = permutation / 6; // 6 == 3! + permutation -= (permunreg[2] * 6); + permunreg[3] = permutation / 2; // 2 == 2! + permutation -= (permunreg[3] * 2); + permunreg[4] = permutation; // 1 == 1! + permunreg[5] = 0; + break; + case 5: + permunreg[0] = permutation / 120; + permutation -= (permunreg[0] * 120); + permunreg[1] = permutation / 24; + permutation -= (permunreg[1] * 24); + permunreg[2] = permutation / 6; + permutation -= (permunreg[2] * 6); + permunreg[3] = permutation / 2; + permutation -= (permunreg[3] * 2); + permunreg[4] = permutation; + break; + case 4: + permunreg[0] = permutation / 60; + permutation -= (permunreg[0] * 60); + permunreg[1] = permutation / 12; + permutation -= (permunreg[1] * 12); + permunreg[2] = permutation / 3; + permutation -= (permunreg[2] * 3); + permunreg[3] = permutation; + break; + case 3: + permunreg[0] = permutation / 20; + permutation -= (permunreg[0] * 20); + permunreg[1] = permutation / 4; + permutation -= (permunreg[1] * 4); + permunreg[2] = permutation; + break; + case 2: + permunreg[0] = permutation / 5; + permutation -= (permunreg[0] * 5); + permunreg[1] = permutation; + break; + case 1: + permunreg[0] = permutation; + break; + } + + // Decode the Lehmer code for this permutation of + // the registers v. http://en.wikipedia.org/wiki/Lehmer_code + + int registers[6] = {UNWIND_X86_REG_NONE, UNWIND_X86_REG_NONE, + UNWIND_X86_REG_NONE, UNWIND_X86_REG_NONE, + UNWIND_X86_REG_NONE, UNWIND_X86_REG_NONE}; + bool used[7] = {false, false, false, false, false, false, false}; + for (uint32_t i = 0; i < register_count; i++) { + int renum = 0; + for (int j = 1; j < 7; j++) { + if (used[j] == false) { + if (renum == permunreg[i]) { + registers[i] = j; + used[j] = true; + break; } - - unwind_plan.AppendRow (row); - return true; + renum++; + } } - break; + } - case UNWIND_X86_MODE_DWARF: - { - return false; + uint32_t saved_registers_offset = 1; + saved_registers_offset++; + + for (int i = (sizeof(registers) / sizeof(int)) - 1; i >= 0; i--) { + switch (registers[i]) { + case UNWIND_X86_REG_NONE: + break; + case UNWIND_X86_REG_EBX: + case UNWIND_X86_REG_ECX: + case UNWIND_X86_REG_EDX: + case UNWIND_X86_REG_EDI: + case UNWIND_X86_REG_ESI: + case UNWIND_X86_REG_EBP: + row->SetRegisterLocationToAtCFAPlusOffset( + translate_to_eh_frame_regnum_i386(registers[i]), + wordsize * -saved_registers_offset, true); + saved_registers_offset++; + break; } - break; + } } - return false; -} + unwind_plan.AppendRow(row); + return true; + } break; + case UNWIND_X86_MODE_DWARF: { + return false; + } break; + } + return false; +} -// DWARF register numbers from "DWARF for the ARM 64-bit Architecture (AArch64)" doc by ARM +// DWARF register numbers from "DWARF for the ARM 64-bit Architecture (AArch64)" +// doc by ARM enum arm64_eh_regnum { - x19 = 19, - x20 = 20, - x21 = 21, - x22 = 22, - x23 = 23, - x24 = 24, - x25 = 25, - x26 = 26, - x27 = 27, - x28 = 28, - - fp = 29, - ra = 30, - sp = 31, - pc = 32, - - // Compact unwind encodes d8-d15 but we don't have eh_frame / dwarf reg #'s for the 64-bit - // fp regs. Normally in DWARF it's context sensitive - so it knows it is fetching a - // 32- or 64-bit quantity from reg v8 to indicate s0 or d0 - but the unwinder is operating - // at a lower level and we'd try to fetch 128 bits if we were told that v8 were stored on - // the stack... - v8 = 72, - v9 = 73, - v10 = 74, - v11 = 75, - v12 = 76, - v13 = 77, - v14 = 78, - v15 = 79, + x19 = 19, + x20 = 20, + x21 = 21, + x22 = 22, + x23 = 23, + x24 = 24, + x25 = 25, + x26 = 26, + x27 = 27, + x28 = 28, + + fp = 29, + ra = 30, + sp = 31, + pc = 32, + + // Compact unwind encodes d8-d15 but we don't have eh_frame / dwarf reg #'s + // for the 64-bit + // fp regs. Normally in DWARF it's context sensitive - so it knows it is + // fetching a + // 32- or 64-bit quantity from reg v8 to indicate s0 or d0 - but the unwinder + // is operating + // at a lower level and we'd try to fetch 128 bits if we were told that v8 + // were stored on + // the stack... + v8 = 72, + v9 = 73, + v10 = 74, + v11 = 75, + v12 = 76, + v13 = 77, + v14 = 78, + v15 = 79, }; enum arm_eh_regnum { - arm_r0 = 0, - arm_r1 = 1, - arm_r2 = 2, - arm_r3 = 3, - arm_r4 = 4, - arm_r5 = 5, - arm_r6 = 6, - arm_r7 = 7, - arm_r8 = 8, - arm_r9 = 9, - arm_r10 = 10, - arm_r11 = 11, - arm_r12 = 12, - - arm_sp = 13, - arm_lr = 14, - arm_pc = 15, - - arm_d0 = 256, - arm_d1 = 257, - arm_d2 = 258, - arm_d3 = 259, - arm_d4 = 260, - arm_d5 = 261, - arm_d6 = 262, - arm_d7 = 263, - arm_d8 = 264, - arm_d9 = 265, - arm_d10 = 266, - arm_d11 = 267, - arm_d12 = 268, - arm_d13 = 269, - arm_d14 = 270, + arm_r0 = 0, + arm_r1 = 1, + arm_r2 = 2, + arm_r3 = 3, + arm_r4 = 4, + arm_r5 = 5, + arm_r6 = 6, + arm_r7 = 7, + arm_r8 = 8, + arm_r9 = 9, + arm_r10 = 10, + arm_r11 = 11, + arm_r12 = 12, + + arm_sp = 13, + arm_lr = 14, + arm_pc = 15, + + arm_d0 = 256, + arm_d1 = 257, + arm_d2 = 258, + arm_d3 = 259, + arm_d4 = 260, + arm_d5 = 261, + arm_d6 = 262, + arm_d7 = 263, + arm_d8 = 264, + arm_d9 = 265, + arm_d10 = 266, + arm_d11 = 267, + arm_d12 = 268, + arm_d13 = 269, + arm_d14 = 270, }; +bool CompactUnwindInfo::CreateUnwindPlan_arm64(Target &target, + FunctionInfo &function_info, + UnwindPlan &unwind_plan, + Address pc_or_function_start) { + unwind_plan.SetSourceName("compact unwind info"); + unwind_plan.SetSourcedFromCompiler(eLazyBoolYes); + unwind_plan.SetUnwindPlanValidAtAllInstructions(eLazyBoolNo); + unwind_plan.SetRegisterKind(eRegisterKindEHFrame); + unwind_plan.SetLSDAAddress(function_info.lsda_address); + unwind_plan.SetPersonalityFunctionPtr(function_info.personality_ptr_address); -bool -CompactUnwindInfo::CreateUnwindPlan_arm64 (Target &target, FunctionInfo &function_info, UnwindPlan &unwind_plan, Address pc_or_function_start) -{ - unwind_plan.SetSourceName ("compact unwind info"); - unwind_plan.SetSourcedFromCompiler (eLazyBoolYes); - unwind_plan.SetUnwindPlanValidAtAllInstructions (eLazyBoolNo); - unwind_plan.SetRegisterKind (eRegisterKindEHFrame); - - unwind_plan.SetLSDAAddress (function_info.lsda_address); - unwind_plan.SetPersonalityFunctionPtr (function_info.personality_ptr_address); - - UnwindPlan::RowSP row (new UnwindPlan::Row); - - const int wordsize = 8; - int mode = function_info.encoding & UNWIND_ARM64_MODE_MASK; - - if (mode == UNWIND_ARM64_MODE_DWARF) - return false; - - if (mode == UNWIND_ARM64_MODE_FRAMELESS) - { - row->SetOffset (0); - - uint32_t stack_size = (EXTRACT_BITS (function_info.encoding, UNWIND_ARM64_FRAMELESS_STACK_SIZE_MASK)) * 16; - - // Our previous Call Frame Address is the stack pointer plus the stack size - row->GetCFAValue().SetIsRegisterPlusOffset (arm64_eh_regnum::sp, stack_size); - - // Our previous PC is in the LR - row->SetRegisterLocationToRegister(arm64_eh_regnum::pc, arm64_eh_regnum::ra, true); - - unwind_plan.AppendRow (row); - return true; - } - - // Should not be possible - if (mode != UNWIND_ARM64_MODE_FRAME) - return false; - - - // mode == UNWIND_ARM64_MODE_FRAME - - row->GetCFAValue().SetIsRegisterPlusOffset (arm64_eh_regnum::fp , 2 * wordsize); - row->SetOffset (0); - row->SetRegisterLocationToAtCFAPlusOffset (arm64_eh_regnum::fp, wordsize * -2, true); - row->SetRegisterLocationToAtCFAPlusOffset (arm64_eh_regnum::pc, wordsize * -1, true); - row->SetRegisterLocationToIsCFAPlusOffset (arm64_eh_regnum::sp, 0, true); + UnwindPlan::RowSP row(new UnwindPlan::Row); - int reg_pairs_saved_count = 1; + const int wordsize = 8; + int mode = function_info.encoding & UNWIND_ARM64_MODE_MASK; - uint32_t saved_register_bits = function_info.encoding & 0xfff; - - if (saved_register_bits & UNWIND_ARM64_FRAME_X19_X20_PAIR) - { - int cfa_offset = reg_pairs_saved_count * -2 * wordsize; - cfa_offset -= wordsize; - row->SetRegisterLocationToAtCFAPlusOffset (arm64_eh_regnum::x19, cfa_offset, true); - cfa_offset -= wordsize; - row->SetRegisterLocationToAtCFAPlusOffset (arm64_eh_regnum::x20, cfa_offset, true); - reg_pairs_saved_count++; - } - - if (saved_register_bits & UNWIND_ARM64_FRAME_X21_X22_PAIR) - { - int cfa_offset = reg_pairs_saved_count * -2 * wordsize; - cfa_offset -= wordsize; - row->SetRegisterLocationToAtCFAPlusOffset (arm64_eh_regnum::x21, cfa_offset, true); - cfa_offset -= wordsize; - row->SetRegisterLocationToAtCFAPlusOffset (arm64_eh_regnum::x22, cfa_offset, true); - reg_pairs_saved_count++; - } + if (mode == UNWIND_ARM64_MODE_DWARF) + return false; - if (saved_register_bits & UNWIND_ARM64_FRAME_X23_X24_PAIR) - { - int cfa_offset = reg_pairs_saved_count * -2 * wordsize; - cfa_offset -= wordsize; - row->SetRegisterLocationToAtCFAPlusOffset (arm64_eh_regnum::x23, cfa_offset, true); - cfa_offset -= wordsize; - row->SetRegisterLocationToAtCFAPlusOffset (arm64_eh_regnum::x24, cfa_offset, true); - reg_pairs_saved_count++; - } + if (mode == UNWIND_ARM64_MODE_FRAMELESS) { + row->SetOffset(0); - if (saved_register_bits & UNWIND_ARM64_FRAME_X25_X26_PAIR) - { - int cfa_offset = reg_pairs_saved_count * -2 * wordsize; - cfa_offset -= wordsize; - row->SetRegisterLocationToAtCFAPlusOffset (arm64_eh_regnum::x25, cfa_offset, true); - cfa_offset -= wordsize; - row->SetRegisterLocationToAtCFAPlusOffset (arm64_eh_regnum::x26, cfa_offset, true); - reg_pairs_saved_count++; - } + uint32_t stack_size = + (EXTRACT_BITS(function_info.encoding, + UNWIND_ARM64_FRAMELESS_STACK_SIZE_MASK)) * + 16; - if (saved_register_bits & UNWIND_ARM64_FRAME_X27_X28_PAIR) - { - int cfa_offset = reg_pairs_saved_count * -2 * wordsize; - cfa_offset -= wordsize; - row->SetRegisterLocationToAtCFAPlusOffset (arm64_eh_regnum::x27, cfa_offset, true); - cfa_offset -= wordsize; - row->SetRegisterLocationToAtCFAPlusOffset (arm64_eh_regnum::x28, cfa_offset, true); - reg_pairs_saved_count++; - } + // Our previous Call Frame Address is the stack pointer plus the stack size + row->GetCFAValue().SetIsRegisterPlusOffset(arm64_eh_regnum::sp, stack_size); - // If we use the v8-v15 regnums here, the unwinder will try to grab 128 bits off the stack; - // not sure if we have a good way to represent the 64-bitness of these saves. + // Our previous PC is in the LR + row->SetRegisterLocationToRegister(arm64_eh_regnum::pc, arm64_eh_regnum::ra, + true); - if (saved_register_bits & UNWIND_ARM64_FRAME_D8_D9_PAIR) - { - reg_pairs_saved_count++; - } - if (saved_register_bits & UNWIND_ARM64_FRAME_D10_D11_PAIR) - { - reg_pairs_saved_count++; - } - if (saved_register_bits & UNWIND_ARM64_FRAME_D12_D13_PAIR) - { - reg_pairs_saved_count++; - } - if (saved_register_bits & UNWIND_ARM64_FRAME_D14_D15_PAIR) - { - reg_pairs_saved_count++; - } - - unwind_plan.AppendRow (row); + unwind_plan.AppendRow(row); return true; -} - -bool -CompactUnwindInfo::CreateUnwindPlan_armv7 (Target &target, FunctionInfo &function_info, UnwindPlan &unwind_plan, Address pc_or_function_start) -{ - unwind_plan.SetSourceName ("compact unwind info"); - unwind_plan.SetSourcedFromCompiler (eLazyBoolYes); - unwind_plan.SetUnwindPlanValidAtAllInstructions (eLazyBoolNo); - unwind_plan.SetRegisterKind (eRegisterKindEHFrame); - - unwind_plan.SetLSDAAddress (function_info.lsda_address); - unwind_plan.SetPersonalityFunctionPtr (function_info.personality_ptr_address); - - UnwindPlan::RowSP row (new UnwindPlan::Row); + } - const int wordsize = 4; - int mode = function_info.encoding & UNWIND_ARM_MODE_MASK; - - if (mode == UNWIND_ARM_MODE_DWARF) - return false; - - uint32_t stack_adjust = (EXTRACT_BITS (function_info.encoding, UNWIND_ARM_FRAME_STACK_ADJUST_MASK)) * wordsize; - - row->GetCFAValue().SetIsRegisterPlusOffset (arm_r7 , (2 * wordsize) + stack_adjust); - row->SetOffset (0); - row->SetRegisterLocationToAtCFAPlusOffset (arm_r7, (wordsize * -2) - stack_adjust, true); - row->SetRegisterLocationToAtCFAPlusOffset (arm_pc, (wordsize * -1) - stack_adjust, true); - row->SetRegisterLocationToIsCFAPlusOffset (arm_sp, 0, true); - - int cfa_offset = -stack_adjust - (2 * wordsize); - - uint32_t saved_register_bits = function_info.encoding & 0xff; - - if (saved_register_bits & UNWIND_ARM_FRAME_FIRST_PUSH_R6) - { - cfa_offset -= wordsize; - row->SetRegisterLocationToAtCFAPlusOffset (arm_r6, cfa_offset, true); - } - - if (saved_register_bits & UNWIND_ARM_FRAME_FIRST_PUSH_R5) - { - cfa_offset -= wordsize; - row->SetRegisterLocationToAtCFAPlusOffset (arm_r5, cfa_offset, true); - } - - if (saved_register_bits & UNWIND_ARM_FRAME_FIRST_PUSH_R4) - { - cfa_offset -= wordsize; - row->SetRegisterLocationToAtCFAPlusOffset (arm_r4, cfa_offset, true); - } + // Should not be possible + if (mode != UNWIND_ARM64_MODE_FRAME) + return false; - if (saved_register_bits & UNWIND_ARM_FRAME_SECOND_PUSH_R12) - { - cfa_offset -= wordsize; - row->SetRegisterLocationToAtCFAPlusOffset (arm_r12, cfa_offset, true); - } + // mode == UNWIND_ARM64_MODE_FRAME + + row->GetCFAValue().SetIsRegisterPlusOffset(arm64_eh_regnum::fp, 2 * wordsize); + row->SetOffset(0); + row->SetRegisterLocationToAtCFAPlusOffset(arm64_eh_regnum::fp, wordsize * -2, + true); + row->SetRegisterLocationToAtCFAPlusOffset(arm64_eh_regnum::pc, wordsize * -1, + true); + row->SetRegisterLocationToIsCFAPlusOffset(arm64_eh_regnum::sp, 0, true); + + int reg_pairs_saved_count = 1; + + uint32_t saved_register_bits = function_info.encoding & 0xfff; + + if (saved_register_bits & UNWIND_ARM64_FRAME_X19_X20_PAIR) { + int cfa_offset = reg_pairs_saved_count * -2 * wordsize; + cfa_offset -= wordsize; + row->SetRegisterLocationToAtCFAPlusOffset(arm64_eh_regnum::x19, cfa_offset, + true); + cfa_offset -= wordsize; + row->SetRegisterLocationToAtCFAPlusOffset(arm64_eh_regnum::x20, cfa_offset, + true); + reg_pairs_saved_count++; + } + + if (saved_register_bits & UNWIND_ARM64_FRAME_X21_X22_PAIR) { + int cfa_offset = reg_pairs_saved_count * -2 * wordsize; + cfa_offset -= wordsize; + row->SetRegisterLocationToAtCFAPlusOffset(arm64_eh_regnum::x21, cfa_offset, + true); + cfa_offset -= wordsize; + row->SetRegisterLocationToAtCFAPlusOffset(arm64_eh_regnum::x22, cfa_offset, + true); + reg_pairs_saved_count++; + } + + if (saved_register_bits & UNWIND_ARM64_FRAME_X23_X24_PAIR) { + int cfa_offset = reg_pairs_saved_count * -2 * wordsize; + cfa_offset -= wordsize; + row->SetRegisterLocationToAtCFAPlusOffset(arm64_eh_regnum::x23, cfa_offset, + true); + cfa_offset -= wordsize; + row->SetRegisterLocationToAtCFAPlusOffset(arm64_eh_regnum::x24, cfa_offset, + true); + reg_pairs_saved_count++; + } + + if (saved_register_bits & UNWIND_ARM64_FRAME_X25_X26_PAIR) { + int cfa_offset = reg_pairs_saved_count * -2 * wordsize; + cfa_offset -= wordsize; + row->SetRegisterLocationToAtCFAPlusOffset(arm64_eh_regnum::x25, cfa_offset, + true); + cfa_offset -= wordsize; + row->SetRegisterLocationToAtCFAPlusOffset(arm64_eh_regnum::x26, cfa_offset, + true); + reg_pairs_saved_count++; + } + + if (saved_register_bits & UNWIND_ARM64_FRAME_X27_X28_PAIR) { + int cfa_offset = reg_pairs_saved_count * -2 * wordsize; + cfa_offset -= wordsize; + row->SetRegisterLocationToAtCFAPlusOffset(arm64_eh_regnum::x27, cfa_offset, + true); + cfa_offset -= wordsize; + row->SetRegisterLocationToAtCFAPlusOffset(arm64_eh_regnum::x28, cfa_offset, + true); + reg_pairs_saved_count++; + } + + // If we use the v8-v15 regnums here, the unwinder will try to grab 128 bits + // off the stack; + // not sure if we have a good way to represent the 64-bitness of these saves. + + if (saved_register_bits & UNWIND_ARM64_FRAME_D8_D9_PAIR) { + reg_pairs_saved_count++; + } + if (saved_register_bits & UNWIND_ARM64_FRAME_D10_D11_PAIR) { + reg_pairs_saved_count++; + } + if (saved_register_bits & UNWIND_ARM64_FRAME_D12_D13_PAIR) { + reg_pairs_saved_count++; + } + if (saved_register_bits & UNWIND_ARM64_FRAME_D14_D15_PAIR) { + reg_pairs_saved_count++; + } + + unwind_plan.AppendRow(row); + return true; +} - if (saved_register_bits & UNWIND_ARM_FRAME_SECOND_PUSH_R11) - { - cfa_offset -= wordsize; - row->SetRegisterLocationToAtCFAPlusOffset (arm_r11, cfa_offset, true); - } +bool CompactUnwindInfo::CreateUnwindPlan_armv7(Target &target, + FunctionInfo &function_info, + UnwindPlan &unwind_plan, + Address pc_or_function_start) { + unwind_plan.SetSourceName("compact unwind info"); + unwind_plan.SetSourcedFromCompiler(eLazyBoolYes); + unwind_plan.SetUnwindPlanValidAtAllInstructions(eLazyBoolNo); + unwind_plan.SetRegisterKind(eRegisterKindEHFrame); - if (saved_register_bits & UNWIND_ARM_FRAME_SECOND_PUSH_R10) - { - cfa_offset -= wordsize; - row->SetRegisterLocationToAtCFAPlusOffset (arm_r10, cfa_offset, true); - } + unwind_plan.SetLSDAAddress(function_info.lsda_address); + unwind_plan.SetPersonalityFunctionPtr(function_info.personality_ptr_address); - if (saved_register_bits & UNWIND_ARM_FRAME_SECOND_PUSH_R9) - { - cfa_offset -= wordsize; - row->SetRegisterLocationToAtCFAPlusOffset (arm_r9, cfa_offset, true); - } + UnwindPlan::RowSP row(new UnwindPlan::Row); - if (saved_register_bits & UNWIND_ARM_FRAME_SECOND_PUSH_R8) - { - cfa_offset -= wordsize; - row->SetRegisterLocationToAtCFAPlusOffset (arm_r8, cfa_offset, true); - } + const int wordsize = 4; + int mode = function_info.encoding & UNWIND_ARM_MODE_MASK; + if (mode == UNWIND_ARM_MODE_DWARF) + return false; - if (mode == UNWIND_ARM_MODE_FRAME_D) - { - uint32_t d_reg_bits = EXTRACT_BITS (function_info.encoding, UNWIND_ARM_FRAME_D_REG_COUNT_MASK); - switch (d_reg_bits) - { - case 0: - // vpush {d8} - cfa_offset -= 8; - row->SetRegisterLocationToAtCFAPlusOffset (arm_d8, cfa_offset, true); - break; - case 1: - // vpush {d10} - // vpush {d8} - cfa_offset -= 8; - row->SetRegisterLocationToAtCFAPlusOffset (arm_d10, cfa_offset, true); - cfa_offset -= 8; - row->SetRegisterLocationToAtCFAPlusOffset (arm_d8, cfa_offset, true); - break; - case 2: - // vpush {d12} - // vpush {d10} - // vpush {d8} - cfa_offset -= 8; - row->SetRegisterLocationToAtCFAPlusOffset (arm_d12, cfa_offset, true); - cfa_offset -= 8; - row->SetRegisterLocationToAtCFAPlusOffset (arm_d10, cfa_offset, true); - cfa_offset -= 8; - row->SetRegisterLocationToAtCFAPlusOffset (arm_d8, cfa_offset, true); - break; - case 3: - // vpush {d14} - // vpush {d12} - // vpush {d10} - // vpush {d8} - cfa_offset -= 8; - row->SetRegisterLocationToAtCFAPlusOffset (arm_d14, cfa_offset, true); - cfa_offset -= 8; - row->SetRegisterLocationToAtCFAPlusOffset (arm_d12, cfa_offset, true); - cfa_offset -= 8; - row->SetRegisterLocationToAtCFAPlusOffset (arm_d10, cfa_offset, true); - cfa_offset -= 8; - row->SetRegisterLocationToAtCFAPlusOffset (arm_d8, cfa_offset, true); - break; - case 4: - // vpush {d14} - // vpush {d12} - // sp = (sp - 24) & (-16); - // vst {d8, d9, d10} - cfa_offset -= 8; - row->SetRegisterLocationToAtCFAPlusOffset (arm_d14, cfa_offset, true); - cfa_offset -= 8; - row->SetRegisterLocationToAtCFAPlusOffset (arm_d12, cfa_offset, true); - - // FIXME we don't have a way to represent reg saves at an specific alignment short of - // coming up with some DWARF location description. - - break; - case 5: - // vpush {d14} - // sp = (sp - 40) & (-16); - // vst {d8, d9, d10, d11} - // vst {d12} - - cfa_offset -= 8; - row->SetRegisterLocationToAtCFAPlusOffset (arm_d14, cfa_offset, true); - - // FIXME we don't have a way to represent reg saves at an specific alignment short of - // coming up with some DWARF location description. - - break; - case 6: - // sp = (sp - 56) & (-16); - // vst {d8, d9, d10, d11} - // vst {d12, d13, d14} - - // FIXME we don't have a way to represent reg saves at an specific alignment short of - // coming up with some DWARF location description. - - break; - case 7: - // sp = (sp - 64) & (-16); - // vst {d8, d9, d10, d11} - // vst {d12, d13, d14, d15} - - // FIXME we don't have a way to represent reg saves at an specific alignment short of - // coming up with some DWARF location description. - - break; - } + uint32_t stack_adjust = (EXTRACT_BITS(function_info.encoding, + UNWIND_ARM_FRAME_STACK_ADJUST_MASK)) * + wordsize; + + row->GetCFAValue().SetIsRegisterPlusOffset(arm_r7, + (2 * wordsize) + stack_adjust); + row->SetOffset(0); + row->SetRegisterLocationToAtCFAPlusOffset( + arm_r7, (wordsize * -2) - stack_adjust, true); + row->SetRegisterLocationToAtCFAPlusOffset( + arm_pc, (wordsize * -1) - stack_adjust, true); + row->SetRegisterLocationToIsCFAPlusOffset(arm_sp, 0, true); + + int cfa_offset = -stack_adjust - (2 * wordsize); + + uint32_t saved_register_bits = function_info.encoding & 0xff; + + if (saved_register_bits & UNWIND_ARM_FRAME_FIRST_PUSH_R6) { + cfa_offset -= wordsize; + row->SetRegisterLocationToAtCFAPlusOffset(arm_r6, cfa_offset, true); + } + + if (saved_register_bits & UNWIND_ARM_FRAME_FIRST_PUSH_R5) { + cfa_offset -= wordsize; + row->SetRegisterLocationToAtCFAPlusOffset(arm_r5, cfa_offset, true); + } + + if (saved_register_bits & UNWIND_ARM_FRAME_FIRST_PUSH_R4) { + cfa_offset -= wordsize; + row->SetRegisterLocationToAtCFAPlusOffset(arm_r4, cfa_offset, true); + } + + if (saved_register_bits & UNWIND_ARM_FRAME_SECOND_PUSH_R12) { + cfa_offset -= wordsize; + row->SetRegisterLocationToAtCFAPlusOffset(arm_r12, cfa_offset, true); + } + + if (saved_register_bits & UNWIND_ARM_FRAME_SECOND_PUSH_R11) { + cfa_offset -= wordsize; + row->SetRegisterLocationToAtCFAPlusOffset(arm_r11, cfa_offset, true); + } + + if (saved_register_bits & UNWIND_ARM_FRAME_SECOND_PUSH_R10) { + cfa_offset -= wordsize; + row->SetRegisterLocationToAtCFAPlusOffset(arm_r10, cfa_offset, true); + } + + if (saved_register_bits & UNWIND_ARM_FRAME_SECOND_PUSH_R9) { + cfa_offset -= wordsize; + row->SetRegisterLocationToAtCFAPlusOffset(arm_r9, cfa_offset, true); + } + + if (saved_register_bits & UNWIND_ARM_FRAME_SECOND_PUSH_R8) { + cfa_offset -= wordsize; + row->SetRegisterLocationToAtCFAPlusOffset(arm_r8, cfa_offset, true); + } + + if (mode == UNWIND_ARM_MODE_FRAME_D) { + uint32_t d_reg_bits = + EXTRACT_BITS(function_info.encoding, UNWIND_ARM_FRAME_D_REG_COUNT_MASK); + switch (d_reg_bits) { + case 0: + // vpush {d8} + cfa_offset -= 8; + row->SetRegisterLocationToAtCFAPlusOffset(arm_d8, cfa_offset, true); + break; + case 1: + // vpush {d10} + // vpush {d8} + cfa_offset -= 8; + row->SetRegisterLocationToAtCFAPlusOffset(arm_d10, cfa_offset, true); + cfa_offset -= 8; + row->SetRegisterLocationToAtCFAPlusOffset(arm_d8, cfa_offset, true); + break; + case 2: + // vpush {d12} + // vpush {d10} + // vpush {d8} + cfa_offset -= 8; + row->SetRegisterLocationToAtCFAPlusOffset(arm_d12, cfa_offset, true); + cfa_offset -= 8; + row->SetRegisterLocationToAtCFAPlusOffset(arm_d10, cfa_offset, true); + cfa_offset -= 8; + row->SetRegisterLocationToAtCFAPlusOffset(arm_d8, cfa_offset, true); + break; + case 3: + // vpush {d14} + // vpush {d12} + // vpush {d10} + // vpush {d8} + cfa_offset -= 8; + row->SetRegisterLocationToAtCFAPlusOffset(arm_d14, cfa_offset, true); + cfa_offset -= 8; + row->SetRegisterLocationToAtCFAPlusOffset(arm_d12, cfa_offset, true); + cfa_offset -= 8; + row->SetRegisterLocationToAtCFAPlusOffset(arm_d10, cfa_offset, true); + cfa_offset -= 8; + row->SetRegisterLocationToAtCFAPlusOffset(arm_d8, cfa_offset, true); + break; + case 4: + // vpush {d14} + // vpush {d12} + // sp = (sp - 24) & (-16); + // vst {d8, d9, d10} + cfa_offset -= 8; + row->SetRegisterLocationToAtCFAPlusOffset(arm_d14, cfa_offset, true); + cfa_offset -= 8; + row->SetRegisterLocationToAtCFAPlusOffset(arm_d12, cfa_offset, true); + + // FIXME we don't have a way to represent reg saves at an specific + // alignment short of + // coming up with some DWARF location description. + + break; + case 5: + // vpush {d14} + // sp = (sp - 40) & (-16); + // vst {d8, d9, d10, d11} + // vst {d12} + + cfa_offset -= 8; + row->SetRegisterLocationToAtCFAPlusOffset(arm_d14, cfa_offset, true); + + // FIXME we don't have a way to represent reg saves at an specific + // alignment short of + // coming up with some DWARF location description. + + break; + case 6: + // sp = (sp - 56) & (-16); + // vst {d8, d9, d10, d11} + // vst {d12, d13, d14} + + // FIXME we don't have a way to represent reg saves at an specific + // alignment short of + // coming up with some DWARF location description. + + break; + case 7: + // sp = (sp - 64) & (-16); + // vst {d8, d9, d10, d11} + // vst {d12, d13, d14, d15} + + // FIXME we don't have a way to represent reg saves at an specific + // alignment short of + // coming up with some DWARF location description. + + break; } + } - unwind_plan.AppendRow (row); - return true; + unwind_plan.AppendRow(row); + return true; } - - |
