Add the Dwarf CFA handling.
Bug: 23762183
Test: Ran new unit tests.
Change-Id: I31abac1238cc671b78a505da655fb6298be072b4
diff --git a/libunwindstack/DwarfCfa.cpp b/libunwindstack/DwarfCfa.cpp
new file mode 100644
index 0000000..006f039
--- /dev/null
+++ b/libunwindstack/DwarfCfa.cpp
@@ -0,0 +1,713 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <inttypes.h>
+#include <stdint.h>
+
+#include <string>
+#include <type_traits>
+#include <vector>
+
+#include <android-base/stringprintf.h>
+
+#include "DwarfCfa.h"
+#include "DwarfEncoding.h"
+#include "DwarfMemory.h"
+#include "DwarfOp.h"
+#include "DwarfStructs.h"
+#include "Log.h"
+
+template <typename AddressType>
+constexpr typename DwarfCfa<AddressType>::process_func DwarfCfa<AddressType>::kCallbackTable[64];
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::GetLocationInfo(uint64_t pc, uint64_t start_offset, uint64_t end_offset,
+ dwarf_loc_regs_t* loc_regs) {
+ if (cie_loc_regs_ != nullptr) {
+ for (const auto& entry : *cie_loc_regs_) {
+ (*loc_regs)[entry.first] = entry.second;
+ }
+ }
+ last_error_ = DWARF_ERROR_NONE;
+
+ memory_->set_cur_offset(start_offset);
+ uint64_t cfa_offset;
+ cur_pc_ = fde_->pc_start;
+ while ((cfa_offset = memory_->cur_offset()) < end_offset && cur_pc_ <= pc) {
+ operands_.clear();
+ // Read the cfa information.
+ uint8_t cfa_value;
+ if (!memory_->ReadBytes(&cfa_value, 1)) {
+ last_error_ = DWARF_ERROR_MEMORY_INVALID;
+ return false;
+ }
+ uint8_t cfa_low = cfa_value & 0x3f;
+ // Check the 2 high bits.
+ switch (cfa_value >> 6) {
+ case 1:
+ cur_pc_ += cfa_low * fde_->cie->code_alignment_factor;
+ break;
+ case 2: {
+ uint64_t offset;
+ if (!memory_->ReadULEB128(&offset)) {
+ last_error_ = DWARF_ERROR_MEMORY_INVALID;
+ return false;
+ }
+ SignedType signed_offset =
+ static_cast<SignedType>(offset) * fde_->cie->data_alignment_factor;
+ (*loc_regs)[cfa_low] = {.type = DWARF_LOCATION_OFFSET,
+ .values = {static_cast<uint64_t>(signed_offset)}};
+ break;
+ }
+ case 3: {
+ if (cie_loc_regs_ == nullptr) {
+ log(0, "restore while processing cie");
+ last_error_ = DWARF_ERROR_ILLEGAL_STATE;
+ return false;
+ }
+
+ auto reg_entry = cie_loc_regs_->find(cfa_low);
+ if (reg_entry == cie_loc_regs_->end()) {
+ loc_regs->erase(cfa_low);
+ } else {
+ (*loc_regs)[cfa_low] = reg_entry->second;
+ }
+ break;
+ }
+ case 0: {
+ const auto handle_func = DwarfCfa<AddressType>::kCallbackTable[cfa_low];
+ if (handle_func == nullptr) {
+ last_error_ = DWARF_ERROR_ILLEGAL_VALUE;
+ return false;
+ }
+
+ const auto cfa = &DwarfCfaInfo::kTable[cfa_low];
+ for (size_t i = 0; i < cfa->num_operands; i++) {
+ if (cfa->operands[i] == DW_EH_PE_block) {
+ uint64_t block_length;
+ if (!memory_->ReadULEB128(&block_length)) {
+ last_error_ = DWARF_ERROR_MEMORY_INVALID;
+ return false;
+ }
+ operands_.push_back(block_length);
+ memory_->set_cur_offset(memory_->cur_offset() + block_length);
+ continue;
+ }
+ uint64_t value;
+ if (!memory_->ReadEncodedValue<AddressType>(cfa->operands[i], &value)) {
+ last_error_ = DWARF_ERROR_MEMORY_INVALID;
+ return false;
+ }
+ operands_.push_back(value);
+ }
+
+ if (!(this->*handle_func)(loc_regs)) {
+ return false;
+ }
+ break;
+ }
+ }
+ }
+ return true;
+}
+
+template <typename AddressType>
+std::string DwarfCfa<AddressType>::GetOperandString(uint8_t operand, uint64_t value,
+ uint64_t* cur_pc) {
+ std::string string;
+ switch (operand) {
+ case DwarfCfaInfo::DWARF_DISPLAY_REGISTER:
+ string = " register(" + std::to_string(value) + ")";
+ break;
+ case DwarfCfaInfo::DWARF_DISPLAY_SIGNED_NUMBER:
+ string += " " + std::to_string(static_cast<SignedType>(value));
+ break;
+ case DwarfCfaInfo::DWARF_DISPLAY_ADVANCE_LOC:
+ *cur_pc += value;
+ // Fall through to log the value.
+ case DwarfCfaInfo::DWARF_DISPLAY_NUMBER:
+ string += " " + std::to_string(value);
+ break;
+ case DwarfCfaInfo::DWARF_DISPLAY_SET_LOC:
+ *cur_pc = value;
+ // Fall through to log the value.
+ case DwarfCfaInfo::DWARF_DISPLAY_ADDRESS:
+ if (std::is_same<AddressType, uint32_t>::value) {
+ string += android::base::StringPrintf(" 0x%" PRIx32, static_cast<uint32_t>(value));
+ } else {
+ string += android::base::StringPrintf(" 0x%" PRIx64, static_cast<uint64_t>(value));
+ }
+ break;
+ default:
+ string = " unknown";
+ }
+ return string;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::LogOffsetRegisterString(uint32_t indent, uint64_t cfa_offset,
+ uint8_t reg) {
+ uint64_t offset;
+ if (!memory_->ReadULEB128(&offset)) {
+ return false;
+ }
+ uint64_t end_offset = memory_->cur_offset();
+ memory_->set_cur_offset(cfa_offset);
+
+ std::string raw_data = "Raw Data:";
+ for (uint64_t i = cfa_offset; i < end_offset; i++) {
+ uint8_t value;
+ if (!memory_->ReadBytes(&value, 1)) {
+ return false;
+ }
+ raw_data += android::base::StringPrintf(" 0x%02x", value);
+ }
+ log(indent, "DW_CFA_offset register(%d) %" PRId64, reg, offset);
+ log(indent, "%s", raw_data.c_str());
+ return true;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::LogInstruction(uint32_t indent, uint64_t cfa_offset, uint8_t op,
+ uint64_t* cur_pc) {
+ const auto* cfa = &DwarfCfaInfo::kTable[op];
+ if (cfa->name == nullptr) {
+ log(indent, "Illegal");
+ log(indent, "Raw Data: 0x%02x", op);
+ return true;
+ }
+
+ std::string log_string(cfa->name);
+ std::vector<std::string> expression_lines;
+ for (size_t i = 0; i < cfa->num_operands; i++) {
+ if (cfa->operands[i] == DW_EH_PE_block) {
+ // This is a Dwarf Expression.
+ uint64_t end_offset;
+ if (!memory_->ReadULEB128(&end_offset)) {
+ return false;
+ }
+ log_string += " " + std::to_string(end_offset);
+ end_offset += memory_->cur_offset();
+
+ DwarfOp<AddressType> op(memory_, nullptr);
+ op.GetLogInfo(memory_->cur_offset(), end_offset, &expression_lines);
+ memory_->set_cur_offset(end_offset);
+ } else {
+ uint64_t value;
+ if (!memory_->ReadEncodedValue<AddressType>(cfa->operands[i], &value)) {
+ return false;
+ }
+ log_string += GetOperandString(cfa->display_operands[i], value, cur_pc);
+ }
+ }
+ log(indent, "%s", log_string.c_str());
+
+ // Get the raw bytes of the data.
+ uint64_t end_offset = memory_->cur_offset();
+ memory_->set_cur_offset(cfa_offset);
+ std::string raw_data("Raw Data:");
+ for (uint64_t i = 0; i < end_offset - cfa_offset; i++) {
+ uint8_t value;
+ if (!memory_->ReadBytes(&value, 1)) {
+ return false;
+ }
+
+ // Only show 10 raw bytes per line.
+ if ((i % 10) == 0 && i != 0) {
+ log(indent, "%s", raw_data.c_str());
+ raw_data.clear();
+ }
+ if (raw_data.empty()) {
+ raw_data = "Raw Data:";
+ }
+ raw_data += android::base::StringPrintf(" 0x%02x", value);
+ }
+ if (!raw_data.empty()) {
+ log(indent, "%s", raw_data.c_str());
+ }
+
+ // Log any of the expression data.
+ for (const auto line : expression_lines) {
+ log(indent + 1, "%s", line.c_str());
+ }
+ return true;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::Log(uint32_t indent, uint64_t pc, uint64_t load_bias,
+ uint64_t start_offset, uint64_t end_offset) {
+ memory_->set_cur_offset(start_offset);
+ uint64_t cfa_offset;
+ uint64_t cur_pc = fde_->pc_start;
+ uint64_t old_pc = cur_pc;
+ while ((cfa_offset = memory_->cur_offset()) < end_offset && cur_pc <= pc) {
+ // Read the cfa information.
+ uint8_t cfa_value;
+ if (!memory_->ReadBytes(&cfa_value, 1)) {
+ return false;
+ }
+
+ // Check the 2 high bits.
+ uint8_t cfa_low = cfa_value & 0x3f;
+ switch (cfa_value >> 6) {
+ case 0:
+ if (!LogInstruction(indent, cfa_offset, cfa_low, &cur_pc)) {
+ return false;
+ }
+ break;
+ case 1:
+ log(indent, "DW_CFA_advance_loc %d", cfa_low);
+ log(indent, "Raw Data: 0x%02x", cfa_value);
+ cur_pc += cfa_low * fde_->cie->code_alignment_factor;
+ break;
+ case 2:
+ if (!LogOffsetRegisterString(indent, cfa_offset, cfa_low)) {
+ return false;
+ }
+ break;
+ case 3:
+ log(indent, "DW_CFA_restore register(%d)", cfa_low);
+ log(indent, "Raw Data: 0x%02x", cfa_value);
+ break;
+ }
+ if (cur_pc != old_pc) {
+ log(indent, "");
+ log(indent, "PC 0x%" PRIx64, cur_pc + load_bias);
+ }
+ old_pc = cur_pc;
+ }
+ return true;
+}
+
+// Static data.
+template <typename AddressType>
+bool DwarfCfa<AddressType>::cfa_nop(dwarf_loc_regs_t*) {
+ return true;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::cfa_set_loc(dwarf_loc_regs_t*) {
+ AddressType cur_pc = cur_pc_;
+ AddressType new_pc = operands_[0];
+ if (new_pc < cur_pc) {
+ if (std::is_same<AddressType, uint32_t>::value) {
+ log(0, "Warning: PC is moving backwards: old 0x%" PRIx32 " new 0x%" PRIx32, cur_pc, new_pc);
+ } else {
+ log(0, "Warning: PC is moving backwards: old 0x%" PRIx64 " new 0x%" PRIx64, cur_pc, new_pc);
+ }
+ }
+ cur_pc_ = new_pc;
+ return true;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::cfa_advance_loc(dwarf_loc_regs_t*) {
+ cur_pc_ += operands_[0] * fde_->cie->code_alignment_factor;
+ return true;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::cfa_offset(dwarf_loc_regs_t* loc_regs) {
+ AddressType reg = operands_[0];
+ (*loc_regs)[reg] = {.type = DWARF_LOCATION_OFFSET, .values = {operands_[1]}};
+ return true;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::cfa_restore(dwarf_loc_regs_t* loc_regs) {
+ AddressType reg = operands_[0];
+ if (cie_loc_regs_ == nullptr) {
+ log(0, "restore while processing cie");
+ last_error_ = DWARF_ERROR_ILLEGAL_STATE;
+ return false;
+ }
+ auto reg_entry = cie_loc_regs_->find(reg);
+ if (reg_entry == cie_loc_regs_->end()) {
+ loc_regs->erase(reg);
+ } else {
+ (*loc_regs)[reg] = reg_entry->second;
+ }
+ return true;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::cfa_undefined(dwarf_loc_regs_t* loc_regs) {
+ AddressType reg = operands_[0];
+ (*loc_regs)[reg] = {.type = DWARF_LOCATION_UNDEFINED};
+ return true;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::cfa_same_value(dwarf_loc_regs_t* loc_regs) {
+ AddressType reg = operands_[0];
+ loc_regs->erase(reg);
+ return true;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::cfa_register(dwarf_loc_regs_t* loc_regs) {
+ AddressType reg = operands_[0];
+ AddressType reg_dst = operands_[1];
+ (*loc_regs)[reg] = {.type = DWARF_LOCATION_REGISTER, .values = {reg_dst}};
+ return true;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::cfa_remember_state(dwarf_loc_regs_t* loc_regs) {
+ loc_reg_state_.push(*loc_regs);
+ return true;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::cfa_restore_state(dwarf_loc_regs_t* loc_regs) {
+ if (loc_reg_state_.size() == 0) {
+ log(0, "Warning: Attempt to restore without remember.");
+ return true;
+ }
+ *loc_regs = loc_reg_state_.top();
+ loc_reg_state_.pop();
+ return true;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::cfa_def_cfa(dwarf_loc_regs_t* loc_regs) {
+ (*loc_regs)[CFA_REG] = {.type = DWARF_LOCATION_REGISTER, .values = {operands_[0], operands_[1]}};
+ return true;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::cfa_def_cfa_register(dwarf_loc_regs_t* loc_regs) {
+ auto cfa_location = loc_regs->find(CFA_REG);
+ if (cfa_location == loc_regs->end() || cfa_location->second.type != DWARF_LOCATION_REGISTER) {
+ log(0, "Attempt to set new register, but cfa is not already set to a register.");
+ last_error_ = DWARF_ERROR_ILLEGAL_STATE;
+ return false;
+ }
+
+ cfa_location->second.values[0] = operands_[0];
+ return true;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::cfa_def_cfa_offset(dwarf_loc_regs_t* loc_regs) {
+ // Changing the offset if this is not a register is illegal.
+ auto cfa_location = loc_regs->find(CFA_REG);
+ if (cfa_location == loc_regs->end() || cfa_location->second.type != DWARF_LOCATION_REGISTER) {
+ log(0, "Attempt to set offset, but cfa is not set to a register.");
+ last_error_ = DWARF_ERROR_ILLEGAL_STATE;
+ return false;
+ }
+ cfa_location->second.values[1] = operands_[0];
+ return true;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::cfa_def_cfa_expression(dwarf_loc_regs_t* loc_regs) {
+ (*loc_regs)[CFA_REG] = {.type = DWARF_LOCATION_EXPRESSION,
+ .values = {operands_[0], memory_->cur_offset()}};
+ return true;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::cfa_expression(dwarf_loc_regs_t* loc_regs) {
+ AddressType reg = operands_[0];
+ (*loc_regs)[reg] = {.type = DWARF_LOCATION_EXPRESSION,
+ .values = {operands_[1], memory_->cur_offset()}};
+ return true;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::cfa_offset_extended_sf(dwarf_loc_regs_t* loc_regs) {
+ AddressType reg = operands_[0];
+ SignedType value = static_cast<SignedType>(operands_[1]) * fde_->cie->data_alignment_factor;
+ (*loc_regs)[reg] = {.type = DWARF_LOCATION_OFFSET, .values = {static_cast<uint64_t>(value)}};
+ return true;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::cfa_def_cfa_sf(dwarf_loc_regs_t* loc_regs) {
+ SignedType offset = static_cast<SignedType>(operands_[1]) * fde_->cie->data_alignment_factor;
+ (*loc_regs)[CFA_REG] = {.type = DWARF_LOCATION_REGISTER,
+ .values = {operands_[0], static_cast<uint64_t>(offset)}};
+ return true;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::cfa_def_cfa_offset_sf(dwarf_loc_regs_t* loc_regs) {
+ // Changing the offset if this is not a register is illegal.
+ auto cfa_location = loc_regs->find(CFA_REG);
+ if (cfa_location == loc_regs->end() || cfa_location->second.type != DWARF_LOCATION_REGISTER) {
+ log(0, "Attempt to set offset, but cfa is not set to a register.");
+ last_error_ = DWARF_ERROR_ILLEGAL_STATE;
+ return false;
+ }
+ SignedType offset = static_cast<SignedType>(operands_[0]) * fde_->cie->data_alignment_factor;
+ cfa_location->second.values[1] = static_cast<uint64_t>(offset);
+ return true;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::cfa_val_offset(dwarf_loc_regs_t* loc_regs) {
+ AddressType reg = operands_[0];
+ SignedType offset = static_cast<SignedType>(operands_[1]) * fde_->cie->data_alignment_factor;
+ (*loc_regs)[reg] = {.type = DWARF_LOCATION_VAL_OFFSET, .values = {static_cast<uint64_t>(offset)}};
+ return true;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::cfa_val_offset_sf(dwarf_loc_regs_t* loc_regs) {
+ AddressType reg = operands_[0];
+ SignedType offset = static_cast<SignedType>(operands_[1]) * fde_->cie->data_alignment_factor;
+ (*loc_regs)[reg] = {.type = DWARF_LOCATION_VAL_OFFSET, .values = {static_cast<uint64_t>(offset)}};
+ return true;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::cfa_val_expression(dwarf_loc_regs_t* loc_regs) {
+ AddressType reg = operands_[0];
+ (*loc_regs)[reg] = {.type = DWARF_LOCATION_VAL_EXPRESSION,
+ .values = {operands_[1], memory_->cur_offset()}};
+ return true;
+}
+
+template <typename AddressType>
+bool DwarfCfa<AddressType>::cfa_gnu_negative_offset_extended(dwarf_loc_regs_t* loc_regs) {
+ AddressType reg = operands_[0];
+ SignedType offset = -static_cast<SignedType>(operands_[1]);
+ (*loc_regs)[reg] = {.type = DWARF_LOCATION_OFFSET, .values = {static_cast<uint64_t>(offset)}};
+ return true;
+}
+
+const DwarfCfaInfo::Info DwarfCfaInfo::kTable[64] = {
+ {
+ // 0x00 DW_CFA_nop
+ "DW_CFA_nop",
+ 2,
+ 0,
+ {},
+ {},
+ },
+ {
+ "DW_CFA_set_loc", // 0x01 DW_CFA_set_loc
+ 2,
+ 1,
+ {DW_EH_PE_absptr},
+ {DWARF_DISPLAY_SET_LOC},
+ },
+ {
+ "DW_CFA_advance_loc1", // 0x02 DW_CFA_advance_loc1
+ 2,
+ 1,
+ {DW_EH_PE_udata1},
+ {DWARF_DISPLAY_ADVANCE_LOC},
+ },
+ {
+ "DW_CFA_advance_loc2", // 0x03 DW_CFA_advance_loc2
+ 2,
+ 1,
+ {DW_EH_PE_udata2},
+ {DWARF_DISPLAY_ADVANCE_LOC},
+ },
+ {
+ "DW_CFA_advance_loc4", // 0x04 DW_CFA_advance_loc4
+ 2,
+ 1,
+ {DW_EH_PE_udata4},
+ {DWARF_DISPLAY_ADVANCE_LOC},
+ },
+ {
+ "DW_CFA_offset_extended", // 0x05 DW_CFA_offset_extended
+ 2,
+ 2,
+ {DW_EH_PE_uleb128, DW_EH_PE_uleb128},
+ {DWARF_DISPLAY_REGISTER, DWARF_DISPLAY_NUMBER},
+ },
+ {
+ "DW_CFA_restore_extended", // 0x06 DW_CFA_restore_extended
+ 2,
+ 1,
+ {DW_EH_PE_uleb128},
+ {DWARF_DISPLAY_REGISTER},
+ },
+ {
+ "DW_CFA_undefined", // 0x07 DW_CFA_undefined
+ 2,
+ 1,
+ {DW_EH_PE_uleb128},
+ {DWARF_DISPLAY_REGISTER},
+ },
+ {
+ "DW_CFA_same_value", // 0x08 DW_CFA_same_value
+ 2,
+ 1,
+ {DW_EH_PE_uleb128},
+ {DWARF_DISPLAY_REGISTER},
+ },
+ {
+ "DW_CFA_register", // 0x09 DW_CFA_register
+ 2,
+ 2,
+ {DW_EH_PE_uleb128, DW_EH_PE_uleb128},
+ {DWARF_DISPLAY_REGISTER, DWARF_DISPLAY_REGISTER},
+ },
+ {
+ "DW_CFA_remember_state", // 0x0a DW_CFA_remember_state
+ 2,
+ 0,
+ {},
+ {},
+ },
+ {
+ "DW_CFA_restore_state", // 0x0b DW_CFA_restore_state
+ 2,
+ 0,
+ {},
+ {},
+ },
+ {
+ "DW_CFA_def_cfa", // 0x0c DW_CFA_def_cfa
+ 2,
+ 2,
+ {DW_EH_PE_uleb128, DW_EH_PE_uleb128},
+ {DWARF_DISPLAY_REGISTER, DWARF_DISPLAY_NUMBER},
+ },
+ {
+ "DW_CFA_def_cfa_register", // 0x0d DW_CFA_def_cfa_register
+ 2,
+ 1,
+ {DW_EH_PE_uleb128},
+ {DWARF_DISPLAY_REGISTER},
+ },
+ {
+ "DW_CFA_def_cfa_offset", // 0x0e DW_CFA_def_cfa_offset
+ 2,
+ 1,
+ {DW_EH_PE_uleb128},
+ {DWARF_DISPLAY_NUMBER},
+ },
+ {
+ "DW_CFA_def_cfa_expression", // 0x0f DW_CFA_def_cfa_expression
+ 2,
+ 1,
+ {DW_EH_PE_block},
+ {DWARF_DISPLAY_EVAL_BLOCK},
+ },
+ {
+ "DW_CFA_expression", // 0x10 DW_CFA_expression
+ 2,
+ 2,
+ {DW_EH_PE_uleb128, DW_EH_PE_block},
+ {DWARF_DISPLAY_REGISTER, DWARF_DISPLAY_EVAL_BLOCK},
+ },
+ {
+ "DW_CFA_offset_extended_sf", // 0x11 DW_CFA_offset_extend_sf
+ 2,
+ 2,
+ {DW_EH_PE_uleb128, DW_EH_PE_sleb128},
+ {DWARF_DISPLAY_REGISTER, DWARF_DISPLAY_SIGNED_NUMBER},
+ },
+ {
+ "DW_CFA_def_cfa_sf", // 0x12 DW_CFA_def_cfa_sf
+ 2,
+ 2,
+ {DW_EH_PE_uleb128, DW_EH_PE_sleb128},
+ {DWARF_DISPLAY_REGISTER, DWARF_DISPLAY_SIGNED_NUMBER},
+ },
+ {
+ "DW_CFA_def_cfa_offset_sf", // 0x13 DW_CFA_def_cfa_offset_sf
+ 2,
+ 1,
+ {DW_EH_PE_sleb128},
+ {DWARF_DISPLAY_SIGNED_NUMBER},
+ },
+ {
+ "DW_CFA_val_offset", // 0x14 DW_CFA_val_offset
+ 2,
+ 2,
+ {DW_EH_PE_uleb128, DW_EH_PE_uleb128},
+ {DWARF_DISPLAY_REGISTER, DWARF_DISPLAY_NUMBER},
+ },
+ {
+ "DW_CFA_val_offset_sf", // 0x15 DW_CFA_val_offset_sf
+ 2,
+ 2,
+ {DW_EH_PE_uleb128, DW_EH_PE_sleb128},
+ {DWARF_DISPLAY_REGISTER, DWARF_DISPLAY_SIGNED_NUMBER},
+ },
+ {
+ "DW_CFA_val_expression", // 0x16 DW_CFA_val_expression
+ 2,
+ 2,
+ {DW_EH_PE_uleb128, DW_EH_PE_block},
+ {DWARF_DISPLAY_REGISTER, DWARF_DISPLAY_EVAL_BLOCK},
+ },
+ {nullptr, 0, 0, {}, {}}, // 0x17 illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x18 illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x19 illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x1a illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x1b illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x1c DW_CFA_lo_user (Treat as illegal)
+ {nullptr, 0, 0, {}, {}}, // 0x1d illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x1e illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x1f illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x20 illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x21 illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x22 illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x23 illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x24 illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x25 illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x26 illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x27 illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x28 illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x29 illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x2a illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x2b illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x2c illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x2d DW_CFA_GNU_window_save (Treat as illegal)
+ {
+ "DW_CFA_GNU_args_size", // 0x2e DW_CFA_GNU_args_size
+ 2,
+ 1,
+ {DW_EH_PE_uleb128},
+ {DWARF_DISPLAY_NUMBER},
+ },
+ {
+ "DW_CFA_GNU_negative_offset_extended", // 0x2f DW_CFA_GNU_negative_offset_extended
+ 2,
+ 2,
+ {DW_EH_PE_uleb128, DW_EH_PE_uleb128},
+ {DWARF_DISPLAY_REGISTER, DWARF_DISPLAY_NUMBER},
+ },
+ {nullptr, 0, 0, {}, {}}, // 0x31 illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x32 illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x33 illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x34 illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x35 illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x36 illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x37 illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x38 illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x39 illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x3a illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x3b illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x3c illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x3d illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x3e illegal cfa
+ {nullptr, 0, 0, {}, {}}, // 0x3f DW_CFA_hi_user (Treat as illegal)
+};
+
+// Explicitly instantiate DwarfCfa.
+template class DwarfCfa<uint32_t>;
+template class DwarfCfa<uint64_t>;