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Code Issues Releases Wiki Activity

Better triggering for ActionLaneDivide

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This commit is contained in:
caheckman 2020-03-23 10:06:50 -04:00
parent b3bd637d99
commit 791f16101e
5 changed files with 28 additions and 39 deletions
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31
Ghidra/Features/Decompiler/src/decompile/cpp/funcdata_varnode.cc
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@ -85,6 +85,9 @@ Varnode *Funcdata::newUnique(int4 s,Datatype *ct)
ct = glb->types->getBase(s,TYPE_UNKNOWN);
Varnode *vn = vbank.createUnique(s,ct);
assignHigh(vn);
if (s >= minLanedSize)
checkForLanedRegister(s, vn->getAddr());
// No chance of matching localmap
return vn;
}
@ -104,6 +107,8 @@ Varnode *Funcdata::newVarnodeOut(int4 s,const Address &m,PcodeOp *op)
op->setOutput(vn);
assignHigh(vn);
if (s >= minLanedSize)
checkForLanedRegister(s,m);
uint4 vflags = 0;
SymbolEntry *entry = localmap->queryProperties(m,s,op->getAddr(),vflags);
if (entry != (SymbolEntry *)0)
@ -126,6 +131,8 @@ Varnode *Funcdata::newUniqueOut(int4 s,PcodeOp *op)
Varnode *vn = vbank.createDefUnique(s,ct,op);
op->setOutput(vn);
assignHigh(vn);
if (s >= minLanedSize)
checkForLanedRegister(s, vn->getAddr());
// No chance of matching localmap
return vn;
}
@ -147,6 +154,8 @@ Varnode *Funcdata::newVarnode(int4 s,const Address &m,Datatype *ct)
vn = vbank.create(s,m,ct);
assignHigh(vn);
if (s >= minLanedSize)
checkForLanedRegister(s,m);
uint4 vflags=0;
SymbolEntry *entry = localmap->queryProperties(vn->getAddr(),vn->getSize(),Address(),vflags);
if (entry != (SymbolEntry *)0) // Let entry try to force type
@ -280,19 +289,21 @@ void Funcdata::destroyVarnode(Varnode *vn)
vbank.destroy(vn);
}
/// Record the given Varnode as a potential laned register access.
/// The address and size of the Varnode is recorded, anticipating that new
/// Varnodes at the same storage location may be created
/// \param vn is the given Varnode to mark
/// \param lanedReg is the laned register record to associate with the Varnode
void Funcdata::markLanedVarnode(Varnode *vn,const LanedRegister *lanedReg)
/// Check if the given storage range is a potential laned register.
/// If so, record the storage with the matching laned register record.
/// \param s is the size of the storage range in bytes
/// \param addr is the starting address of the storage range
void Funcdata::checkForLanedRegister(int4 size,const Address &addr)
{
const LanedRegister *lanedRegister = glb->getLanedRegister(addr,size);
if (lanedRegister == (const LanedRegister *)0)
return;
VarnodeData storage;
storage.space = vn->getSpace();
storage.offset = vn->getOffset();
storage.size = vn->getSize();
lanedMap[storage] = lanedReg;
storage.space = addr.getSpace();
storage.offset = addr.getOffset();
storage.size = size;
lanedMap[storage] = lanedRegister;
}
/// Look up the Symbol visible in \b this function's Scope and return the HighVariable