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lineprogram.cpython-39.pyc
a �#�_/ � @ s^ d dl Z d dlZd dlmZ ddlmZ ddlT edd�ZG d d � d e�Z G d d � d e�Z dS ) � N)� namedtuple� )� struct_parse� )�*�LineProgramEntryz command is_extended args statec @ s e Zd ZdZdd� Zdd� ZdS )� LineStatez� Represents a line program state (or a "row" in the matrix describing debug location information for addresses). The instance variables of this class are the "state machine registers" described in section 6.2.2 of DWARFv3 c C sL d| _ d| _d| _d| _d| _|| _d| _d| _d| _d| _ d| _ d| _ d S )Nr r F) �address�file�line�column�op_index�is_stmt� basic_block� end_sequence� prologue_end�epilogue_begin�isa� discriminator)�self�default_is_stmt� r �>/usr/lib/python3.9/site-packages/elftools/dwarf/lineprogram.py�__init__1 s zLineState.__init__c C sN dt | � g}|�d| j � dD ] }|�d|t| |�f � q"d�|�d S )Nz<LineState %x:z address = 0x%x) r r r r r r r r r r z %s = %s� z> )�id�appendr �getattr�join)r �a�attrr r r �__repr__? s zLineState.__repr__N)�__name__� __module__� __qualname__�__doc__r r! r r r r r + s r c @ s0 e Zd ZdZdd� Zdd� Zdd� Zdd � Zd S ) � LineProgramz� Builds a "line table", which is essentially the matrix described in section 6.2 of DWARFv3. It's a list of LineState objects, sorted by increasing address, so it can be used to obtain the state information for each address. c C s( || _ || _|| _|| _|| _d| _dS )a� header: The header of this line program. Note: LineProgram may modify its header by appending file entries if DW_LNE_define_file instructions are encountered. stream: The stream this program can be read from. structs: A DWARFStructs instance suitable for this line program program_{start|end}_offset: Offset in the debug_line section stream where this program starts (the actual program, after the header), and where it ends. The actual range includes start but not end: [start, end - 1] N)�stream�header�structs�program_start_offset�program_end_offset�_decoded_entries)r r( r' r) r* r+ r r r r O s zLineProgram.__init__c C s | j du r| �� | _ | j S )a� Get the decoded entries for this line program. Return a list of LineProgramEntry objects. Note that this contains more information than absolutely required for the line table. The line table can be easily extracted from the list of entries by looking only at entries with non-None state. The extra information is mainly for the purposes of display with readelf and debugging. N)r, �_decode_line_program)r r r r � get_entriesj s zLineProgram.get_entriesc C s | j | S )z6 Implement dict-like access to header entries )r( )r �namer r r � __getitem__y s zLineProgram.__getitem__c sB g � t | jd ��d� �fdd� }d� fdd� }| j}|| jk �r>t| j�d�| j|�}|| jd kr�| d }|| d }|| d }| d �j| | }� j |7 _ �j| | �_| d || d } � j | 7 _ ||| |�jg� �n@|d k�r t| j� d�| j�} t| j�d�| j�} | t k�rRd�_ || g dd� t | jd ��n�| tk�r�t| j�d�| j�} | �_ || | gdd� nt| tk�r�t| jj| j�} | d �| � || | gdd� n:| tk�r�t| j� d�| j�} | �_n| j�| d tj� �n2|tk�r||g � �n|tk�rbt| j� d�| j�} | | jd }� j |7 _ |||g� �n�|tk�r�t| j�d�| j�} � j | 7 _ �n�|t k�r�t| j� d�| j�} | �_ ||| g� �nl|t k�r�t| j� d�| j�} | �_ ||| g� �n8|t k�r �j! �_!||g � �n|t"k�r8d�_#||g � n�|t$k�r~d| d }|| d | d }� j |7 _ |||g� n�|t%k�r�t| j�&d�| j�} � j | 7 _ ||| g� nz|t'k�r�d�_(||g � n^|t)k�r�d�_*||g � nB|t+k�r"t| j� d�| j�} | �_,||| g� nt-dd|f � | j�.� }q6� S )Nr Fc s6 � � t| ||t����� d�_d�_d�_d�_d S )Nr F)r r �copyr r r r ��cmd�args� is_extended��entries�stater r �add_entry_new_state� s �z=LineProgram._decode_line_program.<locals>.add_entry_new_statec s � � t| ||d �� d S )N)r r r2 )r7 r r �add_entry_old_state� s z=LineProgram._decode_line_program.<locals>.add_entry_old_state� Z opcode_base�"maximum_operations_per_instructionZ line_rangeZminimum_instruction_lengthZ line_baser T)r5 Z file_entryr � z(Invalid standard line program opcode: %s)F)F)/r r( r* r+ r r) Z Dwarf_uint8r' r r r Z Dwarf_uleb128ZDW_LNE_end_sequencer ZDW_LNE_set_addressZDwarf_target_addrZDW_LNE_define_fileZDwarf_lineprog_file_entryr ZDW_LNE_set_discriminatorr �seek�os�SEEK_CURZ DW_LNS_copyZDW_LNS_advance_pcZDW_LNS_advance_lineZ Dwarf_sleb128ZDW_LNS_set_filer ZDW_LNS_set_columnr ZDW_LNS_negate_stmtr ZDW_LNS_set_basic_blockr ZDW_LNS_const_add_pcZDW_LNS_fixed_advance_pcZ Dwarf_uint16ZDW_LNS_set_prologue_endr ZDW_LNS_set_epilogue_beginr ZDW_LNS_set_isar Z dwarf_assert�tell) r r9 r: �offsetZopcoder< Zadjusted_opcodeZoperation_advanceZaddress_addendZ line_addendZinst_lenZ ex_opcode�operandr r6 r r- ~ s� � ��� � � � � � � � � � � � � � �� z LineProgram._decode_line_programN)r" r# r$ r% r r. r0 r- r r r r r& I s r& ) r? r1 � collectionsr Z common.utilsr Z constantsr �objectr r& r r r r �<module> s �
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