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LOAD iterating, reclaim auto_live bit

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This commit is contained in:
caheckman 2020-05-13 11:14:14 -04:00
parent 74d27ecb20
commit 764eec057f
5 changed files with 47 additions and 38 deletions
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14
Ghidra/Features/Decompiler/src/decompile/cpp/funcdata_varnode.cc
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@ -257,7 +257,7 @@ Varnode *Funcdata::cloneVarnode(const Varnode *vn)
// These are the flags we allow to be cloned
vflags &= (Varnode::annotation | Varnode::externref |
Varnode::readonly | Varnode::persist |
Varnode::addrtied | Varnode::addrforce | Varnode::auto_live |
Varnode::addrtied | Varnode::addrforce |
Varnode::indirect_creation | Varnode::incidental_copy |
Varnode::volatil | Varnode::mapped);
newvn->setFlags(vflags);
@ -503,7 +503,7 @@ void Funcdata::transferVarnodeProperties(Varnode *vn,Varnode *newVn,int4 lsbOffs
{
uintb newConsume = (vn->getConsume() >> 8*lsbOffset) & calc_mask(newVn->getSize());
uint4 vnFlags = vn->getFlags() & (Varnode::directwrite|Varnode::addrforce|Varnode::auto_live);
uint4 vnFlags = vn->getFlags() & (Varnode::directwrite|Varnode::addrforce);
newVn->setFlags(vnFlags); // Preserve addrforce setting
newVn->setConsume(newConsume);
@ -805,7 +805,7 @@ void Funcdata::calcNZMask(void)
/// \brief Update Varnode properties based on (new) Symbol information
///
/// Boolean properties \b addrtied, \b addrforce, \b auto_live, and \b nolocalalias
/// Boolean properties \b addrtied, \b addrforce, and \b nolocalalias
/// for Varnodes are updated based on new Symbol information they map to.
/// The caller can elect to update data-type information as well, where Varnodes
/// and their associated HighVariables have their data-type finalized based symbols.
@ -874,7 +874,7 @@ bool Funcdata::syncVarnodesWithSymbols(const ScopeLocal *lm,bool typesyes)
/// to point to the first Varnode after the affected set.
///
/// The only properties that can be effectively changed with this
/// routine are \b mapped, \b addrtied, \b addrforce, \b auto_live, and \b nolocalalias.
/// routine are \b mapped, \b addrtied, \b addrforce, and \b nolocalalias.
/// HighVariable splits must occur if \b addrtied is cleared.
///
/// If the given data-type is non-null, an attempt is made to update all the Varnodes
@ -895,13 +895,13 @@ bool Funcdata::syncVarnodesWithSymbol(VarnodeLocSet::const_iterator &iter,uint4
// We take special care with the addrtied flag
// as we cannot set it here if it is clear
// We can CLEAR but not SET the addrtied flag
// If addrtied is cleared, so should addrforce and auto_live
// If addrtied is cleared, so should addrforce
if ((flags&Varnode::addrtied)==0) // Is the addrtied flags cleared
mask |= Varnode::addrtied | Varnode::addrforce | Varnode::auto_live;
mask |= Varnode::addrtied | Varnode::addrforce;
// We can set the nolocalalias flag, but not clear it
// If nolocalalias is set, then addrforce should be cleared
if ((flags&Varnode::nolocalalias)!=0)
mask |= Varnode::nolocalalias | Varnode::addrforce | Varnode::auto_live;
mask |= Varnode::nolocalalias | Varnode::addrforce;
flags &= mask;
vn = *iter;