tequilaOS/platform_system_core
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity
platform_system_core/libunwindstack/DwarfCfa.cpp
Christopher Ferris 4cc36d2b43 Fix handling of load bias values. 
It turns out that for the dwarf information, if a FDE indicates it's pc
relative, then pc has to be incremented by the load bias. If not, then
it should not be incremented.

Previously, the code always subtracted load bias values from pcs, and assumed
that all fdes were incremented by load bias values. The new code actually
reads the fdes and adjusted the pcs in the fde and in the eh frame hdr so
that load bias values are already handled properly.

In addition, add dumping of arm exidx values in unwind_reg_info. This allowed
verifying that the debug frame in those elf files was being handled properly.

Added a new unit test that only has a debug frame that has a non-zero load
bias and has fde entries that do not have pc relative encoding.

Fix a couple of other small bugs.

Bug: 109824792

Test: All libbacktrace/libunwindstack unit tests pass.
Test: Ran ART 137-cfi test and 004-ThreadStress.
Test: Verify that displaying the fde start and end pc actually match the
Test: real data for fde that have pc relative set, and that don't.
Test: Verified that the unwind information for arm exidx matches the
Test: debug frame data.

Change-Id: I707555286b5cb05df9f25489e8c5ede753cfe0fb
2018-06-11 18:53:55 -07:00

735 lines
23 KiB
C++
Raw Blame History

/*
* 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 <unwindstack/DwarfError.h>
#include <unwindstack/DwarfLocation.h>
#include <unwindstack/Log.h>
#include "DwarfCfa.h"
#include "DwarfEncoding.h"
#include "DwarfOp.h"
namespace unwindstack {
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_.code = DWARF_ERROR_NONE;
last_error_.address = 0;
memory_->set_cur_offset(start_offset);
uint64_t cfa_offset;
cur_pc_ = fde_->pc_start;
loc_regs->pc_start = cur_pc_;
while (true) {
if (cur_pc_ > pc) {
loc_regs->pc_end = cur_pc_;
return true;
}
if ((cfa_offset = memory_->cur_offset()) >= end_offset) {
loc_regs->pc_end = fde_->pc_end;
return true;
}
loc_regs->pc_start = cur_pc_;
operands_.clear();
// Read the cfa information.
uint8_t cfa_value;
if (!memory_->ReadBytes(&cfa_value, 1)) {
last_error_.code = DWARF_ERROR_MEMORY_INVALID;
last_error_.address = memory_->cur_offset();
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_.code = DWARF_ERROR_MEMORY_INVALID;
last_error_.address = memory_->cur_offset();
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_.code = 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_.code = 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_.code = DWARF_ERROR_MEMORY_INVALID;
last_error_.address = memory_->cur_offset();
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_.code = DWARF_ERROR_MEMORY_INVALID;
last_error_.address = memory_->cur_offset();
return false;
}
operands_.push_back(value);
}
if (!(this->*handle_func)(loc_regs)) {
return false;
}
break;
}
}
}
}
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 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(0, "");
log(indent, "PC 0x%" PRIx64, cur_pc);
}
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_.code = 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_.code = 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_.code = 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) {
// There is only one type of expression for CFA evaluation and the DWARF
// specification is unclear whether it returns the address or the
// dereferenced value. GDB expects the value, so will we.
(*loc_regs)[CFA_REG] = {.type = DWARF_LOCATION_VAL_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_.code = 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>;
} // namespace unwindstack
Reference in a new issue View git blame Copy permalink