| //===-- DWARFFormValue.cpp --------------------------------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include <assert.h> |
| |
| #include "lldb/Core/Module.h" |
| #include "lldb/Core/dwarf.h" |
| #include "lldb/Symbol/ObjectFile.h" |
| #include "lldb/Utility/Stream.h" |
| |
| #include "DWARFDebugInfo.h" |
| #include "DWARFFormValue.h" |
| #include "DWARFUnit.h" |
| |
| class DWARFUnit; |
| |
| using namespace lldb_private; |
| |
| void DWARFFormValue::Clear() { |
| m_unit = nullptr; |
| m_form = 0; |
| m_value = ValueTypeTag(); |
| } |
| |
| bool DWARFFormValue::ExtractValue(const DWARFDataExtractor &data, |
| lldb::offset_t *offset_ptr) { |
| if (m_form == DW_FORM_implicit_const) |
| return true; |
| |
| bool indirect = false; |
| bool is_block = false; |
| m_value.data = nullptr; |
| uint8_t ref_addr_size; |
| // Read the value for the form into value and follow and DW_FORM_indirect |
| // instances we run into |
| do { |
| indirect = false; |
| switch (m_form) { |
| case DW_FORM_addr: |
| assert(m_unit); |
| m_value.value.uval = |
| data.GetMaxU64(offset_ptr, DWARFUnit::GetAddressByteSize(m_unit)); |
| break; |
| case DW_FORM_block1: |
| m_value.value.uval = data.GetU8(offset_ptr); |
| is_block = true; |
| break; |
| case DW_FORM_block2: |
| m_value.value.uval = data.GetU16(offset_ptr); |
| is_block = true; |
| break; |
| case DW_FORM_block4: |
| m_value.value.uval = data.GetU32(offset_ptr); |
| is_block = true; |
| break; |
| case DW_FORM_data16: |
| m_value.value.uval = 16; |
| is_block = true; |
| break; |
| case DW_FORM_exprloc: |
| case DW_FORM_block: |
| m_value.value.uval = data.GetULEB128(offset_ptr); |
| is_block = true; |
| break; |
| case DW_FORM_string: |
| m_value.value.cstr = data.GetCStr(offset_ptr); |
| break; |
| case DW_FORM_sdata: |
| m_value.value.sval = data.GetSLEB128(offset_ptr); |
| break; |
| case DW_FORM_strp: |
| case DW_FORM_line_strp: |
| case DW_FORM_sec_offset: |
| m_value.value.uval = data.GetMaxU64(offset_ptr, 4); |
| break; |
| case DW_FORM_addrx1: |
| case DW_FORM_strx1: |
| case DW_FORM_ref1: |
| case DW_FORM_data1: |
| case DW_FORM_flag: |
| m_value.value.uval = data.GetU8(offset_ptr); |
| break; |
| case DW_FORM_addrx2: |
| case DW_FORM_strx2: |
| case DW_FORM_ref2: |
| case DW_FORM_data2: |
| m_value.value.uval = data.GetU16(offset_ptr); |
| break; |
| case DW_FORM_addrx3: |
| case DW_FORM_strx3: |
| m_value.value.uval = data.GetMaxU64(offset_ptr, 3); |
| break; |
| case DW_FORM_addrx4: |
| case DW_FORM_strx4: |
| case DW_FORM_ref4: |
| case DW_FORM_data4: |
| m_value.value.uval = data.GetU32(offset_ptr); |
| break; |
| case DW_FORM_data8: |
| case DW_FORM_ref8: |
| case DW_FORM_ref_sig8: |
| m_value.value.uval = data.GetU64(offset_ptr); |
| break; |
| case DW_FORM_addrx: |
| case DW_FORM_rnglistx: |
| case DW_FORM_strx: |
| case DW_FORM_udata: |
| case DW_FORM_ref_udata: |
| case DW_FORM_GNU_str_index: |
| case DW_FORM_GNU_addr_index: |
| m_value.value.uval = data.GetULEB128(offset_ptr); |
| break; |
| case DW_FORM_ref_addr: |
| assert(m_unit); |
| if (m_unit->GetVersion() <= 2) |
| ref_addr_size = m_unit->GetAddressByteSize(); |
| else |
| ref_addr_size = 4; |
| m_value.value.uval = data.GetMaxU64(offset_ptr, ref_addr_size); |
| break; |
| case DW_FORM_indirect: |
| m_form = data.GetULEB128(offset_ptr); |
| indirect = true; |
| break; |
| case DW_FORM_flag_present: |
| m_value.value.uval = 1; |
| break; |
| default: |
| return false; |
| } |
| } while (indirect); |
| |
| if (is_block) { |
| m_value.data = data.PeekData(*offset_ptr, m_value.value.uval); |
| if (m_value.data != nullptr) { |
| *offset_ptr += m_value.value.uval; |
| } |
| } |
| |
| return true; |
| } |
| |
| struct FormSize { |
| uint8_t valid:1, size:7; |
| }; |
| static FormSize g_form_sizes[] = { |
| {0,0}, // 0x00 unused |
| {0,0}, // 0x01 DW_FORM_addr |
| {0,0}, // 0x02 unused |
| {0,0}, // 0x03 DW_FORM_block2 |
| {0,0}, // 0x04 DW_FORM_block4 |
| {1,2}, // 0x05 DW_FORM_data2 |
| {1,4}, // 0x06 DW_FORM_data4 |
| {1,8}, // 0x07 DW_FORM_data8 |
| {0,0}, // 0x08 DW_FORM_string |
| {0,0}, // 0x09 DW_FORM_block |
| {0,0}, // 0x0a DW_FORM_block1 |
| {1,1}, // 0x0b DW_FORM_data1 |
| {1,1}, // 0x0c DW_FORM_flag |
| {0,0}, // 0x0d DW_FORM_sdata |
| {1,4}, // 0x0e DW_FORM_strp |
| {0,0}, // 0x0f DW_FORM_udata |
| {0,0}, // 0x10 DW_FORM_ref_addr (addr size for DWARF2 and earlier, 4 bytes for |
| // DWARF32, 8 bytes for DWARF32 in DWARF 3 and later |
| {1,1}, // 0x11 DW_FORM_ref1 |
| {1,2}, // 0x12 DW_FORM_ref2 |
| {1,4}, // 0x13 DW_FORM_ref4 |
| {1,8}, // 0x14 DW_FORM_ref8 |
| {0,0}, // 0x15 DW_FORM_ref_udata |
| {0,0}, // 0x16 DW_FORM_indirect |
| {1,4}, // 0x17 DW_FORM_sec_offset |
| {0,0}, // 0x18 DW_FORM_exprloc |
| {1,0}, // 0x19 DW_FORM_flag_present |
| {0,0}, // 0x1a |
| {0,0}, // 0x1b |
| {0,0}, // 0x1c |
| {0,0}, // 0x1d |
| {0,0}, // 0x1e |
| {0,0}, // 0x1f |
| {1,8}, // 0x20 DW_FORM_ref_sig8 |
| }; |
| |
| llvm::Optional<uint8_t> |
| DWARFFormValue::GetFixedSize(dw_form_t form, const DWARFUnit *u) { |
| if (form <= DW_FORM_ref_sig8 && g_form_sizes[form].valid) |
| return g_form_sizes[form].size; |
| if (form == DW_FORM_addr && u) |
| return u->GetAddressByteSize(); |
| return llvm::None; |
| } |
| |
| llvm::Optional<uint8_t> DWARFFormValue::GetFixedSize() const { |
| return GetFixedSize(m_form, m_unit); |
| } |
| |
| bool DWARFFormValue::SkipValue(const DWARFDataExtractor &debug_info_data, |
| lldb::offset_t *offset_ptr) const { |
| return DWARFFormValue::SkipValue(m_form, debug_info_data, offset_ptr, m_unit); |
| } |
| |
| bool DWARFFormValue::SkipValue(dw_form_t form, |
| const DWARFDataExtractor &debug_info_data, |
| lldb::offset_t *offset_ptr, |
| const DWARFUnit *unit) { |
| uint8_t ref_addr_size; |
| switch (form) { |
| // Blocks if inlined data that have a length field and the data bytes inlined |
| // in the .debug_info |
| case DW_FORM_exprloc: |
| case DW_FORM_block: { |
| dw_uleb128_t size = debug_info_data.GetULEB128(offset_ptr); |
| *offset_ptr += size; |
| } |
| return true; |
| case DW_FORM_block1: { |
| dw_uleb128_t size = debug_info_data.GetU8(offset_ptr); |
| *offset_ptr += size; |
| } |
| return true; |
| case DW_FORM_block2: { |
| dw_uleb128_t size = debug_info_data.GetU16(offset_ptr); |
| *offset_ptr += size; |
| } |
| return true; |
| case DW_FORM_block4: { |
| dw_uleb128_t size = debug_info_data.GetU32(offset_ptr); |
| *offset_ptr += size; |
| } |
| return true; |
| |
| // Inlined NULL terminated C-strings |
| case DW_FORM_string: |
| debug_info_data.GetCStr(offset_ptr); |
| return true; |
| |
| // Compile unit address sized values |
| case DW_FORM_addr: |
| *offset_ptr += DWARFUnit::GetAddressByteSize(unit); |
| return true; |
| |
| case DW_FORM_ref_addr: |
| ref_addr_size = 4; |
| assert(unit); // Unit must be valid for DW_FORM_ref_addr objects or we will |
| // get this wrong |
| if (unit->GetVersion() <= 2) |
| ref_addr_size = unit->GetAddressByteSize(); |
| else |
| ref_addr_size = 4; |
| *offset_ptr += ref_addr_size; |
| return true; |
| |
| // 0 bytes values (implied from DW_FORM) |
| case DW_FORM_flag_present: |
| case DW_FORM_implicit_const: |
| return true; |
| |
| // 1 byte values |
| case DW_FORM_addrx1: |
| case DW_FORM_data1: |
| case DW_FORM_flag: |
| case DW_FORM_ref1: |
| case DW_FORM_strx1: |
| *offset_ptr += 1; |
| return true; |
| |
| // 2 byte values |
| case DW_FORM_addrx2: |
| case DW_FORM_data2: |
| case DW_FORM_ref2: |
| case DW_FORM_strx2: |
| *offset_ptr += 2; |
| return true; |
| |
| // 3 byte values |
| case DW_FORM_addrx3: |
| case DW_FORM_strx3: |
| *offset_ptr += 3; |
| return true; |
| |
| // 32 bit for DWARF 32, 64 for DWARF 64 |
| case DW_FORM_sec_offset: |
| case DW_FORM_strp: |
| *offset_ptr += 4; |
| return true; |
| |
| // 4 byte values |
| case DW_FORM_addrx4: |
| case DW_FORM_data4: |
| case DW_FORM_ref4: |
| case DW_FORM_strx4: |
| *offset_ptr += 4; |
| return true; |
| |
| // 8 byte values |
| case DW_FORM_data8: |
| case DW_FORM_ref8: |
| case DW_FORM_ref_sig8: |
| *offset_ptr += 8; |
| return true; |
| |
| // signed or unsigned LEB 128 values |
| case DW_FORM_addrx: |
| case DW_FORM_rnglistx: |
| case DW_FORM_sdata: |
| case DW_FORM_udata: |
| case DW_FORM_ref_udata: |
| case DW_FORM_GNU_addr_index: |
| case DW_FORM_GNU_str_index: |
| case DW_FORM_strx: |
| debug_info_data.Skip_LEB128(offset_ptr); |
| return true; |
| |
| case DW_FORM_indirect: { |
| dw_form_t indirect_form = debug_info_data.GetULEB128(offset_ptr); |
| return DWARFFormValue::SkipValue(indirect_form, debug_info_data, offset_ptr, |
| unit); |
| } |
| |
| default: |
| break; |
| } |
| return false; |
| } |
| |
| void DWARFFormValue::Dump(Stream &s) const { |
| uint64_t uvalue = Unsigned(); |
| bool unit_relative_offset = false; |
| |
| switch (m_form) { |
| case DW_FORM_addr: |
| s.Address(uvalue, sizeof(uint64_t)); |
| break; |
| case DW_FORM_flag: |
| case DW_FORM_data1: |
| s.PutHex8(uvalue); |
| break; |
| case DW_FORM_data2: |
| s.PutHex16(uvalue); |
| break; |
| case DW_FORM_sec_offset: |
| case DW_FORM_data4: |
| s.PutHex32(uvalue); |
| break; |
| case DW_FORM_ref_sig8: |
| case DW_FORM_data8: |
| s.PutHex64(uvalue); |
| break; |
| case DW_FORM_string: |
| s.QuotedCString(AsCString()); |
| break; |
| case DW_FORM_exprloc: |
| case DW_FORM_block: |
| case DW_FORM_block1: |
| case DW_FORM_block2: |
| case DW_FORM_block4: |
| if (uvalue > 0) { |
| switch (m_form) { |
| case DW_FORM_exprloc: |
| case DW_FORM_block: |
| s.Printf("<0x%" PRIx64 "> ", uvalue); |
| break; |
| case DW_FORM_block1: |
| s.Printf("<0x%2.2x> ", (uint8_t)uvalue); |
| break; |
| case DW_FORM_block2: |
| s.Printf("<0x%4.4x> ", (uint16_t)uvalue); |
| break; |
| case DW_FORM_block4: |
| s.Printf("<0x%8.8x> ", (uint32_t)uvalue); |
| break; |
| default: |
| break; |
| } |
| |
| const uint8_t *data_ptr = m_value.data; |
| if (data_ptr) { |
| const uint8_t *end_data_ptr = |
| data_ptr + uvalue; // uvalue contains size of block |
| while (data_ptr < end_data_ptr) { |
| s.Printf("%2.2x ", *data_ptr); |
| ++data_ptr; |
| } |
| } else |
| s.PutCString("NULL"); |
| } |
| break; |
| |
| case DW_FORM_sdata: |
| s.PutSLEB128(uvalue); |
| break; |
| case DW_FORM_udata: |
| s.PutULEB128(uvalue); |
| break; |
| case DW_FORM_strp: { |
| const char *dbg_str = AsCString(); |
| if (dbg_str) { |
| s.QuotedCString(dbg_str); |
| } else { |
| s.PutHex32(uvalue); |
| } |
| } break; |
| |
| case DW_FORM_ref_addr: { |
| assert(m_unit); // Unit must be valid for DW_FORM_ref_addr objects or we |
| // will get this wrong |
| if (m_unit->GetVersion() <= 2) |
| s.Address(uvalue, sizeof(uint64_t) * 2); |
| else |
| s.Address(uvalue, 4 * 2); // 4 for DWARF32, 8 for DWARF64, but we don't |
| // support DWARF64 yet |
| break; |
| } |
| case DW_FORM_ref1: |
| unit_relative_offset = true; |
| break; |
| case DW_FORM_ref2: |
| unit_relative_offset = true; |
| break; |
| case DW_FORM_ref4: |
| unit_relative_offset = true; |
| break; |
| case DW_FORM_ref8: |
| unit_relative_offset = true; |
| break; |
| case DW_FORM_ref_udata: |
| unit_relative_offset = true; |
| break; |
| |
| // All DW_FORM_indirect attributes should be resolved prior to calling this |
| // function |
| case DW_FORM_indirect: |
| s.PutCString("DW_FORM_indirect"); |
| break; |
| case DW_FORM_flag_present: |
| break; |
| default: |
| s.Printf("DW_FORM(0x%4.4x)", m_form); |
| break; |
| } |
| |
| if (unit_relative_offset) { |
| assert(m_unit); // Unit must be valid for DW_FORM_ref forms that are compile |
| // unit relative or we will get this wrong |
| s.Printf("{0x%8.8" PRIx64 "}", uvalue + m_unit->GetOffset()); |
| } |
| } |
| |
| const char *DWARFFormValue::AsCString() const { |
| SymbolFileDWARF &symbol_file = m_unit->GetSymbolFileDWARF(); |
| |
| if (m_form == DW_FORM_string) { |
| return m_value.value.cstr; |
| } else if (m_form == DW_FORM_strp) { |
| return symbol_file.GetDWARFContext().getOrLoadStrData().PeekCStr( |
| m_value.value.uval); |
| } else if (m_form == DW_FORM_GNU_str_index) { |
| uint32_t index_size = 4; |
| lldb::offset_t offset = m_value.value.uval * index_size; |
| dw_offset_t str_offset = |
| symbol_file.GetDWARFContext().getOrLoadStrOffsetsData().GetMaxU64( |
| &offset, index_size); |
| return symbol_file.GetDWARFContext().getOrLoadStrData().PeekCStr( |
| str_offset); |
| } |
| |
| if (m_form == DW_FORM_strx || m_form == DW_FORM_strx1 || |
| m_form == DW_FORM_strx2 || m_form == DW_FORM_strx3 || |
| m_form == DW_FORM_strx4) { |
| |
| // The same code as above. |
| uint32_t indexSize = 4; |
| lldb::offset_t offset = |
| m_unit->GetStrOffsetsBase() + m_value.value.uval * indexSize; |
| dw_offset_t strOffset = |
| symbol_file.GetDWARFContext().getOrLoadStrOffsetsData().GetMaxU64( |
| &offset, indexSize); |
| return symbol_file.GetDWARFContext().getOrLoadStrData().PeekCStr(strOffset); |
| } |
| |
| if (m_form == DW_FORM_line_strp) |
| return symbol_file.GetDWARFContext().getOrLoadLineStrData().PeekCStr( |
| m_value.value.uval); |
| |
| return nullptr; |
| } |
| |
| dw_addr_t DWARFFormValue::Address() const { |
| SymbolFileDWARF &symbol_file = m_unit->GetSymbolFileDWARF(); |
| |
| if (m_form == DW_FORM_addr) |
| return Unsigned(); |
| |
| assert(m_unit); |
| assert(m_form == DW_FORM_GNU_addr_index || m_form == DW_FORM_addrx || |
| m_form == DW_FORM_addrx1 || m_form == DW_FORM_addrx2 || |
| m_form == DW_FORM_addrx3 || m_form == DW_FORM_addrx4); |
| |
| uint32_t index_size = m_unit->GetAddressByteSize(); |
| dw_offset_t addr_base = m_unit->GetAddrBase(); |
| lldb::offset_t offset = addr_base + m_value.value.uval * index_size; |
| return symbol_file.GetDWARFContext().getOrLoadAddrData().GetMaxU64( |
| &offset, index_size); |
| } |
| |
| DWARFDIE DWARFFormValue::Reference() const { |
| uint64_t value = m_value.value.uval; |
| switch (m_form) { |
| case DW_FORM_ref1: |
| case DW_FORM_ref2: |
| case DW_FORM_ref4: |
| case DW_FORM_ref8: |
| case DW_FORM_ref_udata: |
| assert(m_unit); // Unit must be valid for DW_FORM_ref forms that are compile |
| // unit relative or we will get this wrong |
| value += m_unit->GetOffset(); |
| if (!m_unit->ContainsDIEOffset(value)) { |
| m_unit->GetSymbolFileDWARF().GetObjectFile()->GetModule()->ReportError( |
| "DW_FORM_ref* DIE reference 0x%" PRIx64 " is outside of its CU", |
| value); |
| return {}; |
| } |
| return const_cast<DWARFUnit *>(m_unit)->GetDIE(value); |
| |
| case DW_FORM_ref_addr: { |
| DWARFUnit *ref_cu = |
| m_unit->GetSymbolFileDWARF().DebugInfo()->GetUnitContainingDIEOffset( |
| DIERef::Section::DebugInfo, value); |
| if (!ref_cu) { |
| m_unit->GetSymbolFileDWARF().GetObjectFile()->GetModule()->ReportError( |
| "DW_FORM_ref_addr DIE reference 0x%" PRIx64 " has no matching CU", |
| value); |
| return {}; |
| } |
| return ref_cu->GetDIE(value); |
| } |
| |
| case DW_FORM_ref_sig8: { |
| DWARFTypeUnit *tu = |
| m_unit->GetSymbolFileDWARF().DebugInfo()->GetTypeUnitForHash(value); |
| if (!tu) |
| return {}; |
| return tu->GetDIE(tu->GetTypeOffset()); |
| } |
| |
| default: |
| return {}; |
| } |
| } |
| |
| uint64_t DWARFFormValue::Reference(dw_offset_t base_offset) const { |
| uint64_t value = m_value.value.uval; |
| switch (m_form) { |
| case DW_FORM_ref1: |
| case DW_FORM_ref2: |
| case DW_FORM_ref4: |
| case DW_FORM_ref8: |
| case DW_FORM_ref_udata: |
| return value + base_offset; |
| |
| case DW_FORM_ref_addr: |
| case DW_FORM_ref_sig8: |
| case DW_FORM_GNU_ref_alt: |
| return value; |
| |
| default: |
| return DW_INVALID_OFFSET; |
| } |
| } |
| |
| const uint8_t *DWARFFormValue::BlockData() const { return m_value.data; } |
| |
| bool DWARFFormValue::IsBlockForm(const dw_form_t form) { |
| switch (form) { |
| case DW_FORM_exprloc: |
| case DW_FORM_block: |
| case DW_FORM_block1: |
| case DW_FORM_block2: |
| case DW_FORM_block4: |
| return true; |
| } |
| return false; |
| } |
| |
| bool DWARFFormValue::IsDataForm(const dw_form_t form) { |
| switch (form) { |
| case DW_FORM_sdata: |
| case DW_FORM_udata: |
| case DW_FORM_data1: |
| case DW_FORM_data2: |
| case DW_FORM_data4: |
| case DW_FORM_data8: |
| return true; |
| } |
| return false; |
| } |
| |
| int DWARFFormValue::Compare(const DWARFFormValue &a_value, |
| const DWARFFormValue &b_value) { |
| dw_form_t a_form = a_value.Form(); |
| dw_form_t b_form = b_value.Form(); |
| if (a_form < b_form) |
| return -1; |
| if (a_form > b_form) |
| return 1; |
| switch (a_form) { |
| case DW_FORM_addr: |
| case DW_FORM_addrx: |
| case DW_FORM_flag: |
| case DW_FORM_data1: |
| case DW_FORM_data2: |
| case DW_FORM_data4: |
| case DW_FORM_data8: |
| case DW_FORM_udata: |
| case DW_FORM_ref_addr: |
| case DW_FORM_sec_offset: |
| case DW_FORM_flag_present: |
| case DW_FORM_ref_sig8: |
| case DW_FORM_GNU_addr_index: { |
| uint64_t a = a_value.Unsigned(); |
| uint64_t b = b_value.Unsigned(); |
| if (a < b) |
| return -1; |
| if (a > b) |
| return 1; |
| return 0; |
| } |
| |
| case DW_FORM_sdata: { |
| int64_t a = a_value.Signed(); |
| int64_t b = b_value.Signed(); |
| if (a < b) |
| return -1; |
| if (a > b) |
| return 1; |
| return 0; |
| } |
| |
| case DW_FORM_string: |
| case DW_FORM_strp: |
| case DW_FORM_GNU_str_index: { |
| const char *a_string = a_value.AsCString(); |
| const char *b_string = b_value.AsCString(); |
| if (a_string == b_string) |
| return 0; |
| else if (a_string && b_string) |
| return strcmp(a_string, b_string); |
| else if (a_string == nullptr) |
| return -1; // A string is NULL, and B is valid |
| else |
| return 1; // A string valid, and B is NULL |
| } |
| |
| case DW_FORM_block: |
| case DW_FORM_block1: |
| case DW_FORM_block2: |
| case DW_FORM_block4: |
| case DW_FORM_exprloc: { |
| uint64_t a_len = a_value.Unsigned(); |
| uint64_t b_len = b_value.Unsigned(); |
| if (a_len < b_len) |
| return -1; |
| if (a_len > b_len) |
| return 1; |
| // The block lengths are the same |
| return memcmp(a_value.BlockData(), b_value.BlockData(), a_value.Unsigned()); |
| } break; |
| |
| case DW_FORM_ref1: |
| case DW_FORM_ref2: |
| case DW_FORM_ref4: |
| case DW_FORM_ref8: |
| case DW_FORM_ref_udata: { |
| uint64_t a = a_value.m_value.value.uval; |
| uint64_t b = b_value.m_value.value.uval; |
| if (a < b) |
| return -1; |
| if (a > b) |
| return 1; |
| return 0; |
| } |
| |
| case DW_FORM_indirect: |
| llvm_unreachable( |
| "This shouldn't happen after the form has been extracted..."); |
| |
| default: |
| llvm_unreachable("Unhandled DW_FORM"); |
| } |
| return -1; |
| } |
| |
| bool DWARFFormValue::FormIsSupported(dw_form_t form) { |
| switch (form) { |
| case DW_FORM_addr: |
| case DW_FORM_addrx: |
| case DW_FORM_rnglistx: |
| case DW_FORM_block2: |
| case DW_FORM_block4: |
| case DW_FORM_data2: |
| case DW_FORM_data4: |
| case DW_FORM_data8: |
| case DW_FORM_string: |
| case DW_FORM_block: |
| case DW_FORM_block1: |
| case DW_FORM_data1: |
| case DW_FORM_flag: |
| case DW_FORM_sdata: |
| case DW_FORM_strp: |
| case DW_FORM_strx: |
| case DW_FORM_strx1: |
| case DW_FORM_strx2: |
| case DW_FORM_strx3: |
| case DW_FORM_strx4: |
| case DW_FORM_udata: |
| case DW_FORM_ref_addr: |
| case DW_FORM_ref1: |
| case DW_FORM_ref2: |
| case DW_FORM_ref4: |
| case DW_FORM_ref8: |
| case DW_FORM_ref_udata: |
| case DW_FORM_indirect: |
| case DW_FORM_sec_offset: |
| case DW_FORM_exprloc: |
| case DW_FORM_flag_present: |
| case DW_FORM_ref_sig8: |
| case DW_FORM_GNU_str_index: |
| case DW_FORM_GNU_addr_index: |
| case DW_FORM_implicit_const: |
| return true; |
| default: |
| break; |
| } |
| return false; |
| } |
