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GP-3126 Join support for CONCAT trees

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This commit is contained in:
caheckman 2023-02-22 15:06:26 -05:00
parent bdc6f56c40
commit 7d6c6d28be
17 changed files with 185 additions and 17 deletions
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21
Ghidra/Features/Decompiler/src/decompile/cpp/varnode.cc
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@ -171,7 +171,7 @@ int4 Varnode::characterizeOverlap(const Varnode &op) const
/// I.e. return
/// - 0 if it overlaps op's lsb
/// - 1 if it overlaps op's second lsb and so on
/// \param op is Varnode to test for overlap
/// \param op is the Varnode to test for overlap
/// \return the relative overlap point or -1
int4 Varnode::overlap(const Varnode &op) const
@ -186,6 +186,25 @@ int4 Varnode::overlap(const Varnode &op) const
return -1;
}
/// Return whether \e Least \e Signifigant \e Byte of \b this occurs in \b op.
/// If \b op is in the \e join space, \b this can be in one of the pieces associated with the \e join range, and
/// the offset returned will take into account the relative position of the piece within the whole \e join.
/// Otherwise, this method is equivalent to Varnode::overlap.
/// \param op is the Varnode to test for overlap
/// \return the relative overlap point or -1
int4 Varnode::overlapJoin(const Varnode &op) const
{
if (!loc.isBigEndian()) // Little endian
return loc.overlapJoin(0,op.loc,op.size);
else { // Big endian
int4 over = loc.overlapJoin(size-1,op.loc,op.size);
if (over != -1)
return op.size-1-over;
}
return -1;
}
/// Return whether \e Least \e Signifigant \e Byte of \b this occurs in an Address range
/// I.e. return
/// - 0 if it overlaps op's lsb