#include <x86AssemblyInspectionEngine.h>

Classes
struct	lldb_reg_info
	One of the two initialize methods that can be called on this object; they must be called before any of the assembly inspection methods are called. More...

Public Member Functions
	x86AssemblyInspectionEngine (const lldb_private::ArchSpec &arch)
	default ctor
	~x86AssemblyInspectionEngine ()
	default dtor
void	Initialize (lldb::RegisterContextSP &reg_ctx)
	One of the two initialize methods that can be called on this object; they must be called before any of the assembly inspection methods are called.
void	Initialize (std::vector< lldb_reg_info > &reg_info)
bool	GetNonCallSiteUnwindPlanFromAssembly (uint8_t *data, size_t size, lldb_private::AddressRange &func_range, lldb_private::UnwindPlan &unwind_plan)
	Create an UnwindPlan for a "non-call site" stack frame situation.
bool	AugmentUnwindPlanFromCallSite (uint8_t *data, size_t size, lldb_private::AddressRange &func_range, lldb_private::UnwindPlan &unwind_plan, lldb::RegisterContextSP &reg_ctx)
	Take an existing UnwindPlan, probably from eh_frame which may be missing description of the epilogue instructions, and add the epilogue description to it based on the instructions in the function.
bool	FindFirstNonPrologueInstruction (uint8_t *data, size_t size, size_t &offset)

Private Types
enum	CPU { k_i386 , k_x86_64 , k_cpu_unspecified }
enum	i386_register_numbers { k_machine_eax = 0 , k_machine_ecx = 1 , k_machine_edx = 2 , k_machine_ebx = 3 , k_machine_esp = 4 , k_machine_ebp = 5 , k_machine_esi = 6 , k_machine_edi = 7 , k_machine_eip = 8 }
enum	x86_64_register_numbers { k_machine_rax = 0 , k_machine_rcx = 1 , k_machine_rdx = 2 , k_machine_rbx = 3 , k_machine_rsp = 4 , k_machine_rbp = 5 , k_machine_rsi = 6 , k_machine_rdi = 7 , k_machine_r8 = 8 , k_machine_r9 = 9 , k_machine_r10 = 10 , k_machine_r11 = 11 , k_machine_r12 = 12 , k_machine_r13 = 13 , k_machine_r14 = 14 , k_machine_r15 = 15 , k_machine_rip = 16 }
enum	{ kMaxInstructionByteSize = 32 }
typedef std::map< uint32_t, lldb_reg_info >	MachineRegnumToNameAndLLDBRegnum

Private Member Functions
bool	nonvolatile_reg_p (int machine_regno)
bool	push_rbp_pattern_p ()
bool	push_0_pattern_p ()
bool	push_imm_pattern_p ()
bool	push_extended_pattern_p ()
bool	push_misc_reg_p ()
bool	mov_rsp_rbp_pattern_p ()
bool	mov_rsp_rbx_pattern_p ()
bool	mov_rbp_rsp_pattern_p ()
bool	mov_rbx_rsp_pattern_p ()
bool	sub_rsp_pattern_p (int &amount)
bool	add_rsp_pattern_p (int &amount)
bool	lea_rsp_pattern_p (int &amount)
bool	lea_rbp_rsp_pattern_p (int &amount)
bool	lea_rbx_rsp_pattern_p (int &amount)
bool	and_rsp_pattern_p ()
bool	push_reg_p (int &regno)
bool	pop_reg_p (int &regno)
bool	pop_rbp_pattern_p ()
bool	pop_misc_reg_p ()
bool	leave_pattern_p ()
bool	call_next_insn_pattern_p ()
bool	mov_reg_to_local_stack_frame_p (int &regno, int &rbp_offset)
bool	ret_pattern_p ()
bool	jmp_to_reg_p ()
bool	pc_rel_branch_or_jump_p (const int instruction_length, int &offset)
bool	non_local_branch_p (const lldb::addr_t current_func_text_offset, const lldb_private::AddressRange &func_range, const int instruction_length)
bool	local_branch_p (const lldb::addr_t current_func_text_offset, const lldb_private::AddressRange &func_range, const int instruction_length, lldb::addr_t &target_insn_offset)
uint16_t	extract_2 (uint8_t *b)
int16_t	extract_2_signed (uint8_t *b)
uint32_t	extract_4 (uint8_t *b)
int32_t	extract_4_signed (uint8_t *b)
bool	instruction_length (uint8_t *insn, int &length, uint32_t buffer_remaining_bytes)
bool	machine_regno_to_lldb_regno (int machine_regno, uint32_t &lldb_regno)
	x86AssemblyInspectionEngine (const x86AssemblyInspectionEngine &)=delete
const x86AssemblyInspectionEngine &	operator= (const x86AssemblyInspectionEngine &)=delete

Private Attributes
uint8_t *	m_cur_insn
uint32_t	m_machine_ip_regnum
uint32_t	m_machine_sp_regnum
uint32_t	m_machine_fp_regnum
uint32_t	m_machine_alt_fp_regnum
uint32_t	m_lldb_ip_regnum
uint32_t	m_lldb_sp_regnum
uint32_t	m_lldb_fp_regnum
uint32_t	m_lldb_alt_fp_regnum
MachineRegnumToNameAndLLDBRegnum	m_reg_map
lldb_private::ArchSpec	m_arch
CPU	m_cpu
int	m_wordsize
bool	m_register_map_initialized
::LLVMDisasmContextRef	m_disasm_context

Detailed Description

Definition at line 28 of file x86AssemblyInspectionEngine.h.

Member Typedef Documentation

◆ MachineRegnumToNameAndLLDBRegnum

typedef std::map<uint32_t, lldb_reg_info> lldb_private::x86AssemblyInspectionEngine::MachineRegnumToNameAndLLDBRegnum

private

Definition at line 182 of file x86AssemblyInspectionEngine.h.

Member Enumeration Documentation

◆ anonymous enum

anonymous enum

private

Enumerator
kMaxInstructionByteSize

Definition at line 169 of file x86AssemblyInspectionEngine.h.

◆ CPU

enum lldb_private::x86AssemblyInspectionEngine::CPU

private

Enumerator
k_i386
k_x86_64
k_cpu_unspecified

Definition at line 135 of file x86AssemblyInspectionEngine.h.

◆ i386_register_numbers

enum lldb_private::x86AssemblyInspectionEngine::i386_register_numbers

private

Enumerator
k_machine_eax
k_machine_ecx
k_machine_edx
k_machine_ebx
k_machine_esp
k_machine_ebp
k_machine_esi
k_machine_edi
k_machine_eip

Definition at line 137 of file x86AssemblyInspectionEngine.h.

◆ x86_64_register_numbers

enum lldb_private::x86AssemblyInspectionEngine::x86_64_register_numbers

private

Enumerator
k_machine_rax
k_machine_rcx
k_machine_rdx
k_machine_rbx
k_machine_rsp
k_machine_rbp
k_machine_rsi
k_machine_rdi
k_machine_r8
k_machine_r9
k_machine_r10
k_machine_r11
k_machine_r12
k_machine_r13
k_machine_r14
k_machine_r15
k_machine_rip

Definition at line 149 of file x86AssemblyInspectionEngine.h.

Constructor & Destructor Documentation

◆ x86AssemblyInspectionEngine() [1/2]

x86AssemblyInspectionEngine::x86AssemblyInspectionEngine ( const lldb_private::ArchSpec & arch )

default ctor

Definition at line 23 of file x86AssemblyInspectionEngine.cpp.

References lldb_private::ArchSpec::GetTriple(), k_cpu_unspecified, LLDB_INVALID_REGNUM, m_arch, m_cpu, m_cur_insn, m_disasm_context, m_lldb_alt_fp_regnum, m_lldb_fp_regnum, m_lldb_ip_regnum, m_lldb_sp_regnum, m_machine_alt_fp_regnum, m_machine_fp_regnum, m_machine_ip_regnum, m_machine_sp_regnum, m_reg_map, m_register_map_initialized, and m_wordsize.

Referenced by operator=(), and x86AssemblyInspectionEngine().

◆ ~x86AssemblyInspectionEngine()

x86AssemblyInspectionEngine::~x86AssemblyInspectionEngine ( )

default dtor

Definition at line 39 of file x86AssemblyInspectionEngine.cpp.

References m_disasm_context.

◆ x86AssemblyInspectionEngine() [2/2]

lldb_private::x86AssemblyInspectionEngine::x86AssemblyInspectionEngine ( const x86AssemblyInspectionEngine & )

privatedelete

References x86AssemblyInspectionEngine().

Member Function Documentation

◆ add_rsp_pattern_p()

bool x86AssemblyInspectionEngine::add_rsp_pattern_p ( int & amount )

private

Definition at line 452 of file x86AssemblyInspectionEngine.cpp.

References extract_4(), m_cur_insn, and m_wordsize.

Referenced by AugmentUnwindPlanFromCallSite(), and GetNonCallSiteUnwindPlanFromAssembly().

◆ and_rsp_pattern_p()

bool x86AssemblyInspectionEngine::and_rsp_pattern_p ( )

private

Definition at line 551 of file x86AssemblyInspectionEngine.cpp.

References m_cur_insn, and m_wordsize.

Referenced by GetNonCallSiteUnwindPlanFromAssembly().

◆ AugmentUnwindPlanFromCallSite()

bool x86AssemblyInspectionEngine::AugmentUnwindPlanFromCallSite	(	uint8_t *	data,
		size_t	size,
		lldb_private::AddressRange &	func_range,
		lldb_private::UnwindPlan &	unwind_plan,
		lldb::RegisterContextSP &	reg_ctx )

Take an existing UnwindPlan, probably from eh_frame which may be missing description of the epilogue instructions, and add the epilogue description to it based on the instructions in the function.

The unwind_plan 's register numbers must be converted into the lldb register numbering scheme OR a RegisterContext must be provided in reg_ctx. If the unwind_plan register numbers are already in lldb register numbering, reg_ctx may be null.

Returns: true if the unwind_plan was updated, false if it was not.

Definition at line 1322 of file x86AssemblyInspectionEngine.cpp.

◆ call_next_insn_pattern_p()

bool x86AssemblyInspectionEngine::call_next_insn_pattern_p ( )

private

Definition at line 606 of file x86AssemblyInspectionEngine.cpp.

References m_cur_insn.

Referenced by AugmentUnwindPlanFromCallSite(), and GetNonCallSiteUnwindPlanFromAssembly().

◆ extract_2()

uint16_t x86AssemblyInspectionEngine::extract_2 ( uint8_t * b )

private

Definition at line 845 of file x86AssemblyInspectionEngine.cpp.

◆ extract_2_signed()

int16_t x86AssemblyInspectionEngine::extract_2_signed ( uint8_t * b )

private

Definition at line 852 of file x86AssemblyInspectionEngine.cpp.

Referenced by pc_rel_branch_or_jump_p().

◆ extract_4()

uint32_t x86AssemblyInspectionEngine::extract_4 ( uint8_t * b )

private

Definition at line 859 of file x86AssemblyInspectionEngine.cpp.

Referenced by add_rsp_pattern_p(), lea_rbp_rsp_pattern_p(), lea_rbx_rsp_pattern_p(), lea_rsp_pattern_p(), mov_reg_to_local_stack_frame_p(), and sub_rsp_pattern_p().

◆ extract_4_signed()

int32_t x86AssemblyInspectionEngine::extract_4_signed ( uint8_t * b )

private

Definition at line 866 of file x86AssemblyInspectionEngine.cpp.

Referenced by pc_rel_branch_or_jump_p().

◆ FindFirstNonPrologueInstruction()

bool x86AssemblyInspectionEngine::FindFirstNonPrologueInstruction	(	uint8_t *	data,
		size_t	size,
		size_t &	offset )

Definition at line 1553 of file x86AssemblyInspectionEngine.cpp.

References instruction_length(), kMaxInstructionByteSize, lea_rsp_pattern_p(), m_cur_insn, m_disasm_context, m_register_map_initialized, mov_reg_to_local_stack_frame_p(), mov_rsp_rbp_pattern_p(), push_rbp_pattern_p(), push_reg_p(), and sub_rsp_pattern_p().

◆ GetNonCallSiteUnwindPlanFromAssembly()

bool x86AssemblyInspectionEngine::GetNonCallSiteUnwindPlanFromAssembly	(	uint8_t *	data,
		size_t	size,
		lldb_private::AddressRange &	func_range,
		lldb_private::UnwindPlan &	unwind_plan )

Create an UnwindPlan for a "non-call site" stack frame situation.

This is usually when this function/method is currently executing, and may be at a location where exception-handling style unwind information (eh_frame, compact unwind info, arm unwind info) are not valid. data is a pointer to the instructions for the function size is the size of the instruction buffer above func_range is the start Address and size of the function, to be included in the UnwindPlan unwind_plan is the unwind plan that this method creates

Returns: true if it was able to create an UnwindPlan; false if not.

Definition at line 901 of file x86AssemblyInspectionEngine.cpp.

◆ Initialize() [1/2]

void x86AssemblyInspectionEngine::Initialize ( lldb::RegisterContextSP & reg_ctx )

One of the two initialize methods that can be called on this object; they must be called before any of the assembly inspection methods are called.

This one should be used if the caller has access to a valid RegisterContext.

Definition at line 43 of file x86AssemblyInspectionEngine.cpp.

References lldb::eRegisterKindLLDB, k_cpu_unspecified, k_i386, k_machine_eax, k_machine_ebp, k_machine_ebx, k_machine_ecx, k_machine_edi, k_machine_edx, k_machine_eip, k_machine_esi, k_machine_esp, k_machine_r10, k_machine_r11, k_machine_r12, k_machine_r13, k_machine_r14, k_machine_r15, k_machine_r8, k_machine_r9, k_machine_rax, k_machine_rbp, k_machine_rbx, k_machine_rcx, k_machine_rdi, k_machine_rdx, k_machine_rip, k_machine_rsi, k_machine_rsp, k_x86_64, lldb_private::RegisterInfo::kinds, m_arch, m_cpu, m_lldb_alt_fp_regnum, m_lldb_fp_regnum, m_lldb_ip_regnum, m_lldb_sp_regnum, m_machine_alt_fp_regnum, m_machine_fp_regnum, m_machine_ip_regnum, m_machine_sp_regnum, m_reg_map, m_register_map_initialized, m_wordsize, machine_regno_to_lldb_regno(), and lldb_private::x86AssemblyInspectionEngine::lldb_reg_info::name.

◆ Initialize() [2/2]

void x86AssemblyInspectionEngine::Initialize ( std::vector< lldb_reg_info > & reg_info )

◆ instruction_length()

bool x86AssemblyInspectionEngine::instruction_length	(	uint8_t *	insn,
		int &	length,
		uint32_t	buffer_remaining_bytes )

private

Definition at line 874 of file x86AssemblyInspectionEngine.cpp.

References m_arch, and m_disasm_context.

Referenced by AugmentUnwindPlanFromCallSite(), FindFirstNonPrologueInstruction(), GetNonCallSiteUnwindPlanFromAssembly(), local_branch_p(), non_local_branch_p(), and pc_rel_branch_or_jump_p().

◆ jmp_to_reg_p()

bool x86AssemblyInspectionEngine::jmp_to_reg_p ( )

private

Definition at line 678 of file x86AssemblyInspectionEngine.cpp.

References m_cur_insn.

Referenced by GetNonCallSiteUnwindPlanFromAssembly().

◆ lea_rbp_rsp_pattern_p()

bool x86AssemblyInspectionEngine::lea_rbp_rsp_pattern_p ( int & amount )

private

Definition at line 497 of file x86AssemblyInspectionEngine.cpp.

References extract_4(), m_cur_insn, and m_wordsize.

Referenced by GetNonCallSiteUnwindPlanFromAssembly().

◆ lea_rbx_rsp_pattern_p()

bool x86AssemblyInspectionEngine::lea_rbx_rsp_pattern_p ( int & amount )

private

Definition at line 524 of file x86AssemblyInspectionEngine.cpp.

References extract_4(), m_cur_insn, and m_wordsize.

Referenced by GetNonCallSiteUnwindPlanFromAssembly().

◆ lea_rsp_pattern_p()

bool x86AssemblyInspectionEngine::lea_rsp_pattern_p ( int & amount )

private

Definition at line 471 of file x86AssemblyInspectionEngine.cpp.

References extract_4(), m_cur_insn, and m_wordsize.

Referenced by AugmentUnwindPlanFromCallSite(), FindFirstNonPrologueInstruction(), and GetNonCallSiteUnwindPlanFromAssembly().

◆ leave_pattern_p()

bool x86AssemblyInspectionEngine::leave_pattern_p ( )

private

Definition at line 600 of file x86AssemblyInspectionEngine.cpp.

References m_cur_insn.

Referenced by AugmentUnwindPlanFromCallSite(), and GetNonCallSiteUnwindPlanFromAssembly().

◆ local_branch_p()

bool x86AssemblyInspectionEngine::local_branch_p	(	const lldb::addr_t	current_func_text_offset,
		const lldb_private::AddressRange &	func_range,
		const int	instruction_length,
		lldb::addr_t &	target_insn_offset )

private

Definition at line 800 of file x86AssemblyInspectionEngine.cpp.

References lldb_private::AddressRange::GetByteSize(), instruction_length(), and pc_rel_branch_or_jump_p().

Referenced by non_local_branch_p().

◆ machine_regno_to_lldb_regno()

bool x86AssemblyInspectionEngine::machine_regno_to_lldb_regno	(	int	machine_regno,
		uint32_t &	lldb_regno )

private

Definition at line 891 of file x86AssemblyInspectionEngine.cpp.

References m_reg_map.

Referenced by GetNonCallSiteUnwindPlanFromAssembly(), Initialize(), and Initialize().

◆ mov_rbp_rsp_pattern_p()

bool x86AssemblyInspectionEngine::mov_rbp_rsp_pattern_p ( )

private

Definition at line 409 of file x86AssemblyInspectionEngine.cpp.

References m_cur_insn, and m_wordsize.

Referenced by GetNonCallSiteUnwindPlanFromAssembly().

◆ mov_rbx_rsp_pattern_p()

bool x86AssemblyInspectionEngine::mov_rbx_rsp_pattern_p ( )

private

Definition at line 422 of file x86AssemblyInspectionEngine.cpp.

References m_cur_insn, and m_wordsize.

Referenced by GetNonCallSiteUnwindPlanFromAssembly().

◆ mov_reg_to_local_stack_frame_p()

bool x86AssemblyInspectionEngine::mov_reg_to_local_stack_frame_p	(	int &	regno,
		int &	rbp_offset )

private

Definition at line 623 of file x86AssemblyInspectionEngine.cpp.

References extract_4(), m_cur_insn, m_wordsize, REX_W_DSTREG, REX_W_PREFIX_P, and REX_W_SRCREG.

Referenced by FindFirstNonPrologueInstruction(), and GetNonCallSiteUnwindPlanFromAssembly().

◆ mov_rsp_rbp_pattern_p()

bool x86AssemblyInspectionEngine::mov_rsp_rbp_pattern_p ( )

private

Definition at line 383 of file x86AssemblyInspectionEngine.cpp.

References m_cur_insn, and m_wordsize.

Referenced by FindFirstNonPrologueInstruction(), and GetNonCallSiteUnwindPlanFromAssembly().

◆ mov_rsp_rbx_pattern_p()

bool x86AssemblyInspectionEngine::mov_rsp_rbx_pattern_p ( )

private

Definition at line 396 of file x86AssemblyInspectionEngine.cpp.

References m_cur_insn, and m_wordsize.

Referenced by GetNonCallSiteUnwindPlanFromAssembly().

◆ non_local_branch_p()

bool x86AssemblyInspectionEngine::non_local_branch_p	(	const lldb::addr_t	current_func_text_offset,
		const lldb_private::AddressRange &	func_range,
		const int	instruction_length )