272 lines
8.0 KiB
C++
272 lines
8.0 KiB
C++
/*
|
|
* 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.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <stack>
|
|
#include <string>
|
|
#include <type_traits>
|
|
#include <vector>
|
|
|
|
#include <unwindstack/DwarfError.h>
|
|
#include <unwindstack/DwarfLocation.h>
|
|
#include <unwindstack/DwarfMemory.h>
|
|
#include <unwindstack/DwarfStructs.h>
|
|
|
|
namespace unwindstack {
|
|
|
|
// Forward declarations.
|
|
enum ArchEnum : uint8_t;
|
|
|
|
// DWARF Standard home: http://dwarfstd.org/
|
|
// This code is based on DWARF 4: http://http://dwarfstd.org/doc/DWARF4.pdf
|
|
// See section 6.4.2.1 for a description of the DW_CFA_xxx values.
|
|
|
|
class DwarfCfaInfo {
|
|
public:
|
|
enum DisplayType : uint8_t {
|
|
DWARF_DISPLAY_NONE = 0,
|
|
DWARF_DISPLAY_REGISTER,
|
|
DWARF_DISPLAY_NUMBER,
|
|
DWARF_DISPLAY_SIGNED_NUMBER,
|
|
DWARF_DISPLAY_EVAL_BLOCK,
|
|
DWARF_DISPLAY_ADDRESS,
|
|
DWARF_DISPLAY_SET_LOC,
|
|
DWARF_DISPLAY_ADVANCE_LOC,
|
|
};
|
|
|
|
struct Info {
|
|
// It may seem cleaner to just change the type of 'name' to 'const char *'.
|
|
// However, having a pointer here would require relocation at runtime,
|
|
// causing 'kTable' to be placed in data.rel.ro section instead of rodata
|
|
// section, adding memory pressure to the system. Note that this is only
|
|
// safe because this is only used in C++ code. C++ standard, unlike C
|
|
// standard, mandates the array size to be large enough to hold the NULL
|
|
// terminator when initialized with a string literal.
|
|
const char name[36];
|
|
uint8_t supported_version;
|
|
uint8_t num_operands;
|
|
uint8_t operands[2];
|
|
uint8_t display_operands[2];
|
|
};
|
|
|
|
const static Info kTable[64];
|
|
};
|
|
|
|
template <typename AddressType>
|
|
class DwarfCfa {
|
|
// Signed version of AddressType
|
|
typedef typename std::make_signed<AddressType>::type SignedType;
|
|
|
|
public:
|
|
DwarfCfa(DwarfMemory* memory, const DwarfFde* fde, ArchEnum arch)
|
|
: memory_(memory), fde_(fde), arch_(arch) {}
|
|
virtual ~DwarfCfa() = default;
|
|
|
|
bool GetLocationInfo(uint64_t pc, uint64_t start_offset, uint64_t end_offset,
|
|
DwarfLocations* loc_regs);
|
|
|
|
bool Log(uint32_t indent, uint64_t pc, uint64_t start_offset, uint64_t end_offset);
|
|
|
|
const DwarfErrorData& last_error() { return last_error_; }
|
|
DwarfErrorCode LastErrorCode() { return last_error_.code; }
|
|
uint64_t LastErrorAddress() { return last_error_.address; }
|
|
|
|
AddressType cur_pc() { return cur_pc_; }
|
|
|
|
void set_cie_loc_regs(const DwarfLocations* cie_loc_regs) { cie_loc_regs_ = cie_loc_regs; }
|
|
|
|
protected:
|
|
std::string GetOperandString(uint8_t operand, uint64_t value, uint64_t* cur_pc);
|
|
|
|
bool LogOffsetRegisterString(uint32_t indent, uint64_t cfa_offset, uint8_t reg);
|
|
|
|
bool LogInstruction(uint32_t indent, uint64_t cfa_offset, uint8_t op, uint64_t* cur_pc);
|
|
|
|
private:
|
|
DwarfErrorData last_error_;
|
|
DwarfMemory* memory_;
|
|
const DwarfFde* fde_;
|
|
ArchEnum arch_;
|
|
|
|
AddressType cur_pc_;
|
|
const DwarfLocations* cie_loc_regs_ = nullptr;
|
|
std::vector<AddressType> operands_;
|
|
std::stack<DwarfLocations> loc_reg_state_;
|
|
|
|
// CFA processing functions.
|
|
bool cfa_nop(DwarfLocations*);
|
|
bool cfa_set_loc(DwarfLocations*);
|
|
bool cfa_advance_loc(DwarfLocations*);
|
|
bool cfa_offset(DwarfLocations*);
|
|
bool cfa_restore(DwarfLocations*);
|
|
bool cfa_undefined(DwarfLocations*);
|
|
bool cfa_same_value(DwarfLocations*);
|
|
bool cfa_register(DwarfLocations*);
|
|
bool cfa_remember_state(DwarfLocations*);
|
|
bool cfa_restore_state(DwarfLocations*);
|
|
bool cfa_def_cfa(DwarfLocations*);
|
|
bool cfa_def_cfa_register(DwarfLocations*);
|
|
bool cfa_def_cfa_offset(DwarfLocations*);
|
|
bool cfa_def_cfa_expression(DwarfLocations*);
|
|
bool cfa_expression(DwarfLocations*);
|
|
bool cfa_offset_extended_sf(DwarfLocations*);
|
|
bool cfa_def_cfa_sf(DwarfLocations*);
|
|
bool cfa_def_cfa_offset_sf(DwarfLocations*);
|
|
bool cfa_val_offset(DwarfLocations*);
|
|
bool cfa_val_offset_sf(DwarfLocations*);
|
|
bool cfa_val_expression(DwarfLocations*);
|
|
bool cfa_gnu_negative_offset_extended(DwarfLocations*);
|
|
bool cfa_aarch64_negate_ra_state(DwarfLocations*);
|
|
|
|
using process_func = bool (DwarfCfa::*)(DwarfLocations*);
|
|
constexpr static process_func kCallbackTable[64] = {
|
|
// 0x00 DW_CFA_nop
|
|
&DwarfCfa::cfa_nop,
|
|
// 0x01 DW_CFA_set_loc
|
|
&DwarfCfa::cfa_set_loc,
|
|
// 0x02 DW_CFA_advance_loc1
|
|
&DwarfCfa::cfa_advance_loc,
|
|
// 0x03 DW_CFA_advance_loc2
|
|
&DwarfCfa::cfa_advance_loc,
|
|
// 0x04 DW_CFA_advance_loc4
|
|
&DwarfCfa::cfa_advance_loc,
|
|
// 0x05 DW_CFA_offset_extended
|
|
&DwarfCfa::cfa_offset,
|
|
// 0x06 DW_CFA_restore_extended
|
|
&DwarfCfa::cfa_restore,
|
|
// 0x07 DW_CFA_undefined
|
|
&DwarfCfa::cfa_undefined,
|
|
// 0x08 DW_CFA_same_value
|
|
&DwarfCfa::cfa_same_value,
|
|
// 0x09 DW_CFA_register
|
|
&DwarfCfa::cfa_register,
|
|
// 0x0a DW_CFA_remember_state
|
|
&DwarfCfa::cfa_remember_state,
|
|
// 0x0b DW_CFA_restore_state
|
|
&DwarfCfa::cfa_restore_state,
|
|
// 0x0c DW_CFA_def_cfa
|
|
&DwarfCfa::cfa_def_cfa,
|
|
// 0x0d DW_CFA_def_cfa_register
|
|
&DwarfCfa::cfa_def_cfa_register,
|
|
// 0x0e DW_CFA_def_cfa_offset
|
|
&DwarfCfa::cfa_def_cfa_offset,
|
|
// 0x0f DW_CFA_def_cfa_expression
|
|
&DwarfCfa::cfa_def_cfa_expression,
|
|
// 0x10 DW_CFA_expression
|
|
&DwarfCfa::cfa_expression,
|
|
// 0x11 DW_CFA_offset_extended_sf
|
|
&DwarfCfa::cfa_offset_extended_sf,
|
|
// 0x12 DW_CFA_def_cfa_sf
|
|
&DwarfCfa::cfa_def_cfa_sf,
|
|
// 0x13 DW_CFA_def_cfa_offset_sf
|
|
&DwarfCfa::cfa_def_cfa_offset_sf,
|
|
// 0x14 DW_CFA_val_offset
|
|
&DwarfCfa::cfa_val_offset,
|
|
// 0x15 DW_CFA_val_offset_sf
|
|
&DwarfCfa::cfa_val_offset_sf,
|
|
// 0x16 DW_CFA_val_expression
|
|
&DwarfCfa::cfa_val_expression,
|
|
// 0x17 illegal cfa
|
|
nullptr,
|
|
// 0x18 illegal cfa
|
|
nullptr,
|
|
// 0x19 illegal cfa
|
|
nullptr,
|
|
// 0x1a illegal cfa
|
|
nullptr,
|
|
// 0x1b illegal cfa
|
|
nullptr,
|
|
// 0x1c DW_CFA_lo_user (Treat this as illegal)
|
|
nullptr,
|
|
// 0x1d illegal cfa
|
|
nullptr,
|
|
// 0x1e illegal cfa
|
|
nullptr,
|
|
// 0x1f illegal cfa
|
|
nullptr,
|
|
// 0x20 illegal cfa
|
|
nullptr,
|
|
// 0x21 illegal cfa
|
|
nullptr,
|
|
// 0x22 illegal cfa
|
|
nullptr,
|
|
// 0x23 illegal cfa
|
|
nullptr,
|
|
// 0x24 illegal cfa
|
|
nullptr,
|
|
// 0x25 illegal cfa
|
|
nullptr,
|
|
// 0x26 illegal cfa
|
|
nullptr,
|
|
// 0x27 illegal cfa
|
|
nullptr,
|
|
// 0x28 illegal cfa
|
|
nullptr,
|
|
// 0x29 illegal cfa
|
|
nullptr,
|
|
// 0x2a illegal cfa
|
|
nullptr,
|
|
// 0x2b illegal cfa
|
|
nullptr,
|
|
// 0x2c illegal cfa
|
|
nullptr,
|
|
// 0x2d DW_CFA_AARCH64_negate_ra_state (aarch64 only)
|
|
// DW_CFA_GNU_window_save on other architectures.
|
|
&DwarfCfa::cfa_aarch64_negate_ra_state,
|
|
// 0x2e DW_CFA_GNU_args_size
|
|
&DwarfCfa::cfa_nop,
|
|
// 0x2f DW_CFA_GNU_negative_offset_extended
|
|
&DwarfCfa::cfa_gnu_negative_offset_extended,
|
|
// 0x30 illegal cfa
|
|
nullptr,
|
|
// 0x31 illegal cfa
|
|
nullptr,
|
|
// 0x32 illegal cfa
|
|
nullptr,
|
|
// 0x33 illegal cfa
|
|
nullptr,
|
|
// 0x34 illegal cfa
|
|
nullptr,
|
|
// 0x35 illegal cfa
|
|
nullptr,
|
|
// 0x36 illegal cfa
|
|
nullptr,
|
|
// 0x37 illegal cfa
|
|
nullptr,
|
|
// 0x38 illegal cfa
|
|
nullptr,
|
|
// 0x39 illegal cfa
|
|
nullptr,
|
|
// 0x3a illegal cfa
|
|
nullptr,
|
|
// 0x3b illegal cfa
|
|
nullptr,
|
|
// 0x3c illegal cfa
|
|
nullptr,
|
|
// 0x3d illegal cfa
|
|
nullptr,
|
|
// 0x3e illegal cfa
|
|
nullptr,
|
|
// 0x3f DW_CFA_hi_user (Treat this as illegal)
|
|
nullptr,
|
|
};
|
|
};
|
|
|
|
} // namespace unwindstack
|