decompiler
1.0.0
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Two conditional blocks combined into one conditional using BOOL_AND or BOOL_OR. More...
#include <block.hh>
Public Member Functions | |
BlockCondition (OpCode c) | |
Construct given the boolean operation. | |
OpCode | getOpcode (void) const |
Get the boolean operation. | |
virtual block_type | getType (void) const |
Get the FlowBlock type of this. | |
virtual void | scopeBreak (int4 curexit, int4 curloopexit) |
Mark unstructured edges that should be breaks. | |
virtual void | printHeader (ostream &s) const |
Print a simple description of this to stream. More... | |
virtual void | emit (PrintLanguage *lng) const |
Emit the instructions in this FlowBlock as structured code. More... | |
virtual bool | negateCondition (bool toporbottom) |
Flip the condition computed by this. More... | |
virtual FlowBlock * | getSplitPoint (void) |
Get the leaf splitting block. More... | |
virtual int4 | flipInPlaceTest (vector< PcodeOp *> &fliplist) const |
Test normalizing the conditional branch in this. More... | |
virtual void | flipInPlaceExecute (void) |
Perform the flip to normalize conditional branch executed by this block. More... | |
virtual PcodeOp * | lastOp (void) const |
Get the last PcodeOp executed by this FlowBlock. | |
virtual bool | isComplex (void) const |
Is this too complex to be a condition (BlockCondition) | |
virtual FlowBlock * | nextFlowAfter (const FlowBlock *bl) const |
Get the leaf FlowBlock that will execute after the given FlowBlock. More... | |
virtual void | encodeHeader (Encoder &encoder) const |
Encode basic information as attributes. More... | |
Public Member Functions inherited from ghidra::BlockGraph | |
void | clear (void) |
Clear all component FlowBlock objects. | |
virtual | ~BlockGraph (void) |
Destructor. | |
const vector< FlowBlock * > & | getList (void) const |
Get the list of component FlowBlock objects. | |
int4 | getSize (void) const |
Get the number of components. | |
FlowBlock * | getBlock (int4 i) const |
Get the i-th component. | |
virtual FlowBlock * | subBlock (int4 i) const |
Get the i-th component block. | |
virtual void | markUnstructured (void) |
Mark target blocks of any unstructured edges. | |
virtual void | markLabelBumpUp (bool bump) |
Let hierarchical blocks steal labels of their (first) components. More... | |
virtual void | printTree (ostream &s, int4 level) const |
Print tree structure of any blocks owned by this. More... | |
virtual void | printRaw (ostream &s) const |
Print raw instructions contained in this FlowBlock. | |
virtual void | finalTransform (Funcdata &data) |
Do any structure driven final transforms. | |
virtual void | finalizePrinting (Funcdata &data) const |
Make any final configurations necessary to print the block. | |
virtual void | encodeBody (Encoder &encoder) const |
Encode detail about components to a stream. | |
virtual void | decodeBody (Decoder &decoder) |
Restore details about this FlowBlock from an element stream. More... | |
void | decode (Decoder &decoder) |
Decode this BlockGraph from a stream. More... | |
void | addEdge (FlowBlock *begin, FlowBlock *end) |
Add a directed edge between component FlowBlocks. More... | |
void | addLoopEdge (FlowBlock *begin, int4 outindex) |
Mark a given edge as a loop edge. More... | |
void | removeEdge (FlowBlock *begin, FlowBlock *end) |
Remove an edge between component FlowBlocks. More... | |
void | switchEdge (FlowBlock *in, FlowBlock *outbefore, FlowBlock *outafter) |
Move an edge from one out FlowBlock to another. More... | |
void | moveOutEdge (FlowBlock *blold, int4 slot, FlowBlock *blnew) |
Move indicated out edge to a new FlowBlock. More... | |
void | removeBlock (FlowBlock *bl) |
Remove a FlowBlock from this BlockGraph. More... | |
void | removeFromFlow (FlowBlock *bl) |
Remove given FlowBlock preserving flow in this. More... | |
void | removeFromFlowSplit (FlowBlock *bl, bool flipflow) |
Remove FlowBlock splitting flow between input and output edges. More... | |
void | spliceBlock (FlowBlock *bl) |
Splice given FlowBlock together with its output. More... | |
void | setStartBlock (FlowBlock *bl) |
Set the entry point FlowBlock for this graph. More... | |
FlowBlock * | getStartBlock (void) const |
Get the entry point FlowBlock. More... | |
FlowBlock * | newBlock (void) |
Build a new plain FlowBlock. More... | |
BlockBasic * | newBlockBasic (Funcdata *fd) |
Build a new BlockBasic. More... | |
BlockCopy * | newBlockCopy (FlowBlock *bl) |
Build a new BlockCopy. More... | |
BlockGoto * | newBlockGoto (FlowBlock *bl) |
Build a new BlockGoto. More... | |
BlockMultiGoto * | newBlockMultiGoto (FlowBlock *bl, int4 outedge) |
Build a new BlockMultiGoto. More... | |
BlockList * | newBlockList (const vector< FlowBlock *> &nodes) |
Build a new BlockList. More... | |
BlockCondition * | newBlockCondition (FlowBlock *b1, FlowBlock *b2) |
Build a new BlockCondition. More... | |
BlockIf * | newBlockIfGoto (FlowBlock *cond) |
Build a new BlockIfGoto. More... | |
BlockIf * | newBlockIf (FlowBlock *cond, FlowBlock *tc) |
Build a new BlockIf. More... | |
BlockIf * | newBlockIfElse (FlowBlock *cond, FlowBlock *tc, FlowBlock *fc) |
Build a new BlockIfElse. More... | |
BlockWhileDo * | newBlockWhileDo (FlowBlock *cond, FlowBlock *cl) |
Build a new BlockWhileDo. More... | |
BlockDoWhile * | newBlockDoWhile (FlowBlock *condcl) |
Build a new BlockDoWhile. More... | |
BlockInfLoop * | newBlockInfLoop (FlowBlock *body) |
Build a new BlockInfLoop. More... | |
BlockSwitch * | newBlockSwitch (const vector< FlowBlock *> &cs, bool hasExit) |
Build a new BlockSwitch. More... | |
void | orderBlocks (void) |
void | buildCopy (const BlockGraph &graph) |
Build a copy of a BlockGraph. More... | |
void | clearVisitCount (void) |
Clear the visit count in all node FlowBlocks. | |
void | calcForwardDominator (const vector< FlowBlock *> &rootlist) |
Calculate forward dominators. More... | |
void | buildDomTree (vector< vector< FlowBlock *> > &child) const |
Build the dominator tree. More... | |
int4 | buildDomDepth (vector< int4 > &depth) const |
Calculate dominator depths. More... | |
void | buildDomSubTree (vector< FlowBlock *> &res, FlowBlock *root) const |
Collect nodes from a dominator sub-tree. More... | |
void | calcLoop (void) |
Calculate loop edges. More... | |
void | collectReachable (vector< FlowBlock *> &res, FlowBlock *bl, bool un) const |
Collect reachable/unreachable FlowBlocks from a given start FlowBlock. More... | |
void | structureLoops (vector< FlowBlock *> &rootlist) |
Label loop edges. More... | |
Public Member Functions inherited from ghidra::FlowBlock | |
FlowBlock (void) | |
Construct a block with no edges. | |
virtual | ~FlowBlock (void) |
Destructor. | |
int4 | getIndex (void) const |
Get the index assigned to this block. | |
FlowBlock * | getParent (void) |
Get the parent FlowBlock of this. | |
FlowBlock * | getImmedDom (void) const |
Get the immediate dominator FlowBlock. | |
FlowBlock * | getCopyMap (void) const |
Get the mapped FlowBlock. | |
const FlowBlock * | getParent (void) const |
Get the parent FlowBlock of this. | |
uint4 | getFlags (void) const |
Get the block_flags properties. | |
virtual Address | getStart (void) const |
Get the starting address of code in this FlowBlock. | |
virtual Address | getStop (void) const |
Get the ending address of code in this FlowBlock. | |
virtual const FlowBlock * | getExitLeaf (void) const |
Get the FlowBlock to which this block exits. | |
virtual bool | preferComplement (Funcdata &data) |
Rearrange this hierarchy to simplify boolean expressions. More... | |
virtual void | decodeHeader (Decoder &decoder) |
Decode basic information from element attributes. More... | |
void | encodeEdges (Encoder &encoder) const |
Encode edge information to a stream. More... | |
void | decodeEdges (Decoder &decoder, BlockMap &resolver) |
Restore edges from an encoded stream. More... | |
void | encode (Encoder &encoder) const |
Encode this to a stream. More... | |
void | decode (Decoder &decoder, BlockMap &resolver) |
Decode this from a stream. More... | |
const FlowBlock * | nextInFlow (void) const |
Return next block to be executed in flow. More... | |
void | setVisitCount (int4 i) |
Set the number of times this block has been visited. | |
int4 | getVisitCount (void) const |
Get the count of visits. | |
void | setGotoBranch (int4 i) |
Mark a goto branch. More... | |
void | setDefaultSwitch (int4 pos) |
Mark an edge as the switch default. More... | |
bool | isMark (void) const |
Return true if this block has been marked. | |
void | setMark (void) |
Mark this block. | |
void | clearMark (void) |
Clear any mark on this block. | |
void | setDonothingLoop (void) |
Label this as a do nothing loop. | |
void | setDead (void) |
Label this as dead. | |
bool | hasSpecialLabel (void) const |
Return true if this uses a different label. | |
bool | isJoined (void) const |
Return true if this is a joined basic block. | |
bool | isDuplicated (void) const |
Return true if this is a duplicated block. | |
void | setLoopExit (int4 i) |
Label the edge exiting this as a loop. | |
void | clearLoopExit (int4 i) |
Clear the loop exit edge. | |
void | setBackEdge (int4 i) |
Label the back edge of a loop. | |
bool | getFlipPath (void) const |
Have out edges been flipped. | |
bool | isJumpTarget (void) const |
Return true if non-fallthru jump flows into this. More... | |
FlowBlock * | getFalseOut (void) const |
Get the false output FlowBlock. | |
FlowBlock * | getTrueOut (void) const |
Get the true output FlowBlock. | |
FlowBlock * | getOut (int4 i) |
Get the i-th output FlowBlock. | |
const FlowBlock * | getOut (int4 i) const |
Get i-th output FlowBlock. | |
int4 | getOutRevIndex (int4 i) const |
Get the input index of the i-th output FlowBlock. | |
FlowBlock * | getIn (int4 i) |
Get the i-th input FlowBlock. | |
const FlowBlock * | getIn (int4 i) const |
Get the i-th input FlowBlock. | |
int4 | getInRevIndex (int4 i) const |
Get the output index of the i-th input FlowBlock. | |
const FlowBlock * | getFrontLeaf (void) const |
Get the first leaf FlowBlock. More... | |
FlowBlock * | getFrontLeaf (void) |
Get the first leaf FlowBlock. More... | |
int4 | calcDepth (const FlowBlock *leaf) const |
Get the depth of the given component FlowBlock. More... | |
bool | dominates (const FlowBlock *subBlock) const |
Does this block dominate the given block. More... | |
bool | restrictedByConditional (const FlowBlock *cond) const |
Check if the condition from the given block holds for this block. More... | |
int4 | sizeOut (void) const |
Get the number of out edges. | |
int4 | sizeIn (void) const |
Get the number of in edges. | |
bool | hasLoopIn (void) const |
Is there a looping edge coming into this block. More... | |
bool | hasLoopOut (void) const |
Is there a looping edge going out of this block. More... | |
bool | isLoopIn (int4 i) const |
Is the i-th incoming edge a loop edge. | |
bool | isLoopOut (int4 i) const |
Is the i-th outgoing edge a loop edge. | |
int4 | getInIndex (const FlowBlock *bl) const |
Get the incoming edge index for the given FlowBlock. More... | |
int4 | getOutIndex (const FlowBlock *bl) const |
Get the outgoing edge index for the given FlowBlock. More... | |
bool | isDefaultBranch (int4 i) const |
Is the i-th out edge the switch default edge. | |
bool | isLabelBumpUp (void) const |
Are labels for this printed by the parent. | |
bool | isUnstructuredTarget (void) const |
Is this the target of an unstructured goto. | |
bool | isInteriorGotoTarget (void) const |
Is there an unstructured goto to this block's interior. | |
bool | hasInteriorGoto (void) const |
Is there an unstructured goto out of this block's interior. | |
bool | isEntryPoint (void) const |
Is the entry point of the function. | |
bool | isSwitchOut (void) const |
Is this a switch block. | |
bool | isDonothingLoop (void) const |
Is this a do nothing block. | |
bool | isDead (void) const |
Is this block dead. | |
bool | isTreeEdgeIn (int4 i) const |
Is the i-th incoming edge part of the spanning tree. | |
bool | isBackEdgeIn (int4 i) const |
Is the i-th incoming edge a back edge. | |
bool | isBackEdgeOut (int4 i) const |
Is the i-th outgoing edge a back edge. | |
bool | isIrreducibleOut (int4 i) const |
Is the i-th outgoing edge an irreducible edge. | |
bool | isIrreducibleIn (int4 i) const |
Is the i-th incoming edge an irreducible edge. | |
bool | isDecisionOut (int4 i) const |
Can this and the i-th output be merged into a BlockIf or BlockList. | |
bool | isDecisionIn (int4 i) const |
Can this and the i-th input be merged into a BlockIf or BlockList. | |
bool | isLoopDAGOut (int4 i) const |
Is the i-th outgoing edge part of the DAG sub-graph. | |
bool | isLoopDAGIn (int4 i) const |
Is the i-th incoming edge part of the DAG sub-graph. | |
bool | isGotoIn (int4 i) const |
Is the i-th incoming edge unstructured. | |
bool | isGotoOut (int4 i) const |
Is the i-th outgoing edge unstructured. | |
JumpTable * | getJumptable (void) const |
Get the JumpTable associated this block. More... | |
Private Attributes | |
OpCode | opc |
Type of boolean operation. | |
Additional Inherited Members | |
Public Types inherited from ghidra::FlowBlock | |
enum | block_type { t_plain, t_basic, t_graph, t_copy, t_goto, t_multigoto, t_ls, t_condition, t_if, t_whiledo, t_dowhile, t_switch, t_infloop } |
The possible block types. | |
enum | block_flags { f_goto_goto = 1, f_break_goto = 2, f_continue_goto = 4, f_switch_out = 0x10, f_unstructured_targ = 0x20, f_mark = 0x80, f_mark2 = 0x100, f_entry_point = 0x200, f_interior_gotoout = 0x400, f_interior_gotoin = 0x800, f_label_bumpup = 0x1000, f_donothing_loop = 0x2000, f_dead = 0x4000, f_whiledo_overflow = 0x8000, f_flip_path = 0x10000, f_joined_block = 0x20000, f_duplicate_block = 0x40000 } |
Boolean properties of blocks. More... | |
enum | edge_flags { f_goto_edge = 1, f_loop_edge = 2, f_defaultswitch_edge = 4, f_irreducible = 8, f_tree_edge = 0x10, f_forward_edge = 0x20, f_cross_edge = 0x40, f_back_edge = 0x80, f_loop_exit_edge = 0x100 } |
Boolean properties on edges. More... | |
Static Public Member Functions inherited from ghidra::FlowBlock | |
static block_type | nameToType (const string &name) |
Get the block_type associated with a name string. More... | |
static string | typeToName (block_type bt) |
Get the name string associated with a block_type. More... | |
static bool | compareBlockIndex (const FlowBlock *bl1, const FlowBlock *bl2) |
Compare FlowBlock by index. More... | |
static bool | compareFinalOrder (const FlowBlock *bl1, const FlowBlock *bl2) |
Final FlowBlock comparison. More... | |
static FlowBlock * | findCommonBlock (FlowBlock *bl1, FlowBlock *bl2) |
Find the common dominator of two FlowBlocks. More... | |
static FlowBlock * | findCommonBlock (const vector< FlowBlock *> &blockSet) |
Find common dominator of multiple FlowBlocks. More... | |
Protected Member Functions inherited from ghidra::BlockGraph | |
void | swapBlocks (int4 i, int4 j) |
Swap the positions two component FlowBlocks. More... | |
Protected Member Functions inherited from ghidra::FlowBlock | |
void | setFlag (uint4 fl) |
Set a boolean property. | |
void | clearFlag (uint4 fl) |
Clear a boolean property. | |
Static Protected Member Functions inherited from ghidra::BlockGraph | |
static void | markCopyBlock (FlowBlock *bl, uint4 fl) |
Set properties on the first leaf FlowBlock. More... | |
Two conditional blocks combined into one conditional using BOOL_AND or BOOL_OR.
This class is used to construct full conditional expressions. An instance glues together two components, each with two outgoing edges. Of the four edges, 1 must go between the two components, and 2 must go to the same exit block, so there will be exactly 2 distinct exit blocks in total. The new condition can be interpreted as either:
depending on the boolean operation setting for the condition
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inlinevirtual |
Emit the instructions in this FlowBlock as structured code.
This is the main entry point, at the control-flow level, for printing structured code.
lng | is the PrintLanguage that provides details of the high-level language being printed |
Reimplemented from ghidra::BlockGraph.
References ghidra::PrintLanguage::emitBlockCondition().
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virtual |
Encode basic information as attributes.
encoder | is the stream encoder |
Reimplemented from ghidra::FlowBlock.
References ghidra::FlowBlock::encodeHeader(), and ghidra::Encoder::writeString().
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virtual |
Perform the flip to normalize conditional branch executed by this block.
This reverses the outgoing edge order in the right basic blocks, but does not modify the instructions directly.
Reimplemented from ghidra::FlowBlock.
References ghidra::CPUI_BOOL_AND, and ghidra::CPUI_BOOL_OR.
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virtual |
Test normalizing the conditional branch in this.
Find the set of PcodeOp objects that need to be adjusted to flip the condition this FlowBlock calculates.
Return:
fliplist | will contain the PcodeOps that need to be adjusted |
Reimplemented from ghidra::FlowBlock.
References ghidra::FlowBlock::flipInPlaceTest(), and ghidra::FlowBlock::getSplitPoint().
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inlinevirtual |
Get the leaf splitting block.
If this block ends with a conditional branch, return the deepest component block that performs the split. This component needs to be able to perform flipInPlaceTest() and flipInPlaceExecute()
Reimplemented from ghidra::FlowBlock.
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virtual |
Flip the condition computed by this.
Flip the order of outgoing edges (at least). This should also affect the original op causing the condition. Note: we don't have to flip at all levels of the hierarchy only at the top and at the bottom
toporbottom | is true if this is the top outermost block of the hierarchy getting negated |
Reimplemented from ghidra::FlowBlock.
References ghidra::CPUI_BOOL_AND, ghidra::CPUI_BOOL_OR, and ghidra::FlowBlock::negateCondition().
Get the leaf FlowBlock that will execute after the given FlowBlock.
Within the hierarchy of this FlowBlock, assume the given FlowBlock will fall-thru in its execution at some point. Return the first leaf block (BlockBasic or BlockCopy) that will execute after the given FlowBlock completes, assuming this is a unique block.
bl | is the given FlowBlock |
Reimplemented from ghidra::BlockGraph.
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virtual |
Print a simple description of this to stream.
Only print a header for this single block
s | is the output stream |
Reimplemented from ghidra::FlowBlock.
References ghidra::CPUI_BOOL_AND, and ghidra::FlowBlock::printHeader().