yetangitu/ghidra
1
0
Fork 0
mirror of https://github.com/NationalSecurityAgency/ghidra.git synced 2025-10-05 02:39:44 +02:00
Code Issues Releases Wiki Activity

downcast capability in LaneDivide, moved LaneDivide to stackstall

Browse source
This commit is contained in:
caheckman 2019-10-25 08:55:18 -04:00
parent fa82d8c8f3
commit e90c0c7071
4 changed files with 41 additions and 12 deletions
Download patch file Download diff file Expand all files Collapse all files

21
Ghidra/Features/Decompiler/src/decompile/cpp/subflow.cc
View file

@ -2237,8 +2237,21 @@ bool LaneDivide::traceForward(TransformVar *rvn,int4 numLanes,int4 skipLanes)
{
int4 bytePos = (int4)op->getIn(1)->getOffset();
int4 outLanes,outSkip;
if (!description.restriction(numLanes, skipLanes, bytePos, outvn->getSize(), outLanes, outSkip))
if (!description.restriction(numLanes, skipLanes, bytePos, outvn->getSize(), outLanes, outSkip)) {
if (allowSubpieceTerminator) {
int4 laneIndex = description.getBoundary(bytePos);
if (laneIndex < 0 || laneIndex >= description.getNumLanes()) // Does piece start on lane boundary?
return false;
if (description.getSize(laneIndex) <= outvn->getSize()) // Is the piece smaller than a lane?
return false;
// Treat SUBPIECE as terminating
TransformOp *rop = newPreexistingOp(2, CPUI_SUBPIECE, op);
opSetInput(rop, rvn + (laneIndex - skipLanes), 0);
opSetInput(rop, newConstant(4, 0, 0), 1);
break;
}
return false;
}
if (outLanes == 1) {
TransformOp *rop = newPreexistingOp(1, CPUI_COPY, op);
opSetInput(rop,rvn + (outSkip-skipLanes), 0);
@ -2379,10 +2392,12 @@ bool LaneDivide::processNextWork(void)
/// \param f is the function being transformed
/// \param root is the root Varnode to start tracing lanes from
/// \param desc is a description of the lanes on the root Varnode
LaneDivide::LaneDivide(Funcdata *f,Varnode *root,const LaneDescription &desc)
/// \param allowDowncast is \b true if we all SUBPIECE to be treated as terminating
LaneDivide::LaneDivide(Funcdata *f,Varnode *root,const LaneDescription &desc,bool allowDowncast)
: TransformManager(f), description(desc)
{
setReplacement(root, desc.getNumLanes(), 0);
allowSubpieceTerminator = allowDowncast;
setReplacement(root, desc.getNumLanes(), 0);
}
/// Push the lanes around from the root, setting up the explicit transforms as we go.