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Code Issues Releases Wiki Activity

Allow SLEIGH bitrange operator applied to dynamic varnodes

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This commit is contained in:
caheckman 2022-01-03 17:03:29 -05:00
parent e440e3333f
commit 311a22c038
63 changed files with 1064 additions and 747 deletions
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28
Ghidra/Features/Decompiler/src/decompile/cpp/sleigh.cc
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@ -186,6 +186,30 @@ AddrSpace *SleighBuilder::generatePointer(const VarnodeTpl *vntpl,VarnodeData &v
return hand.space;
}
void SleighBuilder::generatePointerAdd(PcodeData *op,const VarnodeTpl *vntpl)
{
uintb offsetPlus = vntpl->getOffset().getReal() & 0xffff;
if (offsetPlus == 0) {
return;
}
PcodeData *nextop = cache->allocateInstruction();
nextop->opc = op->opc;
nextop->invar = op->invar;
nextop->isize = op->isize;
nextop->outvar = op->outvar;
op->isize = 2;
op->opc = CPUI_INT_ADD;
VarnodeData *newparams = op->invar = cache->allocateVarnodes(2);
newparams[0] = nextop->invar[1];
newparams[1].space = const_space; // Add in V_OFFSET_PLUS
newparams[1].offset = offsetPlus;
newparams[1].size = newparams[0].size;
op->outvar = nextop->invar + 1; // Output of ADD is input to original op
op->outvar->space = uniq_space; // Result of INT_ADD in special runtime temp
op->outvar->offset = uniq_space->getTrans()->getUniqueStart(Translate::RUNTIME_BITRANGE_EA);
}
void SleighBuilder::dump(OpTpl *op)
{ // Dump on op through low-level dump interface
@ -211,6 +235,8 @@ void SleighBuilder::dump(OpTpl *op)
loadvars[0].space = const_space;
loadvars[0].offset = (uintb)(uintp)spc;
loadvars[0].size = sizeof(spc);
if (vn->getOffset().getSelect() == ConstTpl::v_offset_plus)
generatePointerAdd(load_op, vn);
}
else
generateLocation(vn,invars[i]);
@ -238,6 +264,8 @@ void SleighBuilder::dump(OpTpl *op)
storevars[0].space = const_space;
storevars[0].offset = (uintb)(uintp)spc; // space in which to store
storevars[0].size = sizeof(spc);
if (outvn->getOffset().getSelect() == ConstTpl::v_offset_plus)
generatePointerAdd(store_op,outvn);
}
else {
thisop->outvar = cache->allocateVarnodes(1);