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GP-3266 Max jumptable entry option

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This commit is contained in:
caheckman 2023-06-12 16:42:12 -04:00
parent 3b62fdaa95
commit d8b4f910ca
11 changed files with 93 additions and 12 deletions
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22
Ghidra/Features/Decompiler/src/decompile/cpp/options.cc
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@ -58,6 +58,7 @@ ElementId ELEM_SPLITDATATYPE = ElementId("splitdatatype",270);
ElementId ELEM_STRUCTALIGN = ElementId("structalign",208);
ElementId ELEM_TOGGLERULE = ElementId("togglerule",209);
ElementId ELEM_WARNING = ElementId("warning",210);
ElementId ELEM_JUMPTABLEMAX = ElementId("jumptablemax",271);
/// If the parameter is "on" return \b true, if "off" return \b false.
/// Any other value causes an exception.
@ -120,6 +121,7 @@ OptionDatabase::OptionDatabase(Architecture *g)
registerOption(new OptionAllowContextSet());
registerOption(new OptionSetAction());
registerOption(new OptionSetLanguage());
registerOption(new OptionJumpTableMax());
registerOption(new OptionJumpLoad());
registerOption(new OptionToggleRule());
registerOption(new OptionAliasBlock());
@ -794,6 +796,26 @@ string OptionSetLanguage::apply(Architecture *glb,const string &p1,const string
return res;
}
/// \class OptionJumpTableMax
/// \brief Set the maximum number of entries that can be recovered for a single jump table
///
/// This option is an unsigned integer value used during analysis of jump tables. It serves as a
/// sanity check that the recovered number of entries for a jump table is reasonable and
/// also acts as a resource limit on the number of destination addresses that analysis will attempt
/// to follow from a single indirect jump.
string OptionJumpTableMax::apply(Architecture *glb,const string &p1,const string &p2,const string &p3) const
{
istringstream s(p1);
s.unsetf(ios::dec | ios::hex | ios::oct);
uint4 val = 0;
s >> val;
if (val==0)
throw ParseError("Must specify integer maximum");
glb->max_jumptable_size = val;
return "Maximum jumptable size set to "+p1;
}
/// \class OptionJumpLoad
/// \brief Toggle whether the decompiler should try to recover the table used to evaluate a switch
///