tree 1385067dc880a3b4aa15172592c650072c6b3f5f
parent 80237523193d1311e8744b84faa077a1295d80da
author Scott Constable <scott.d.constable@intel.com> 1585941171 -0700
committer Craig Topper <craig.topper@intel.com> 1585944124 -0700

[X86] Add a Pass that builds a Condensed CFG for Load Value Injection (LVI) Gadgets

Adds a new data structure, ImmutableGraph, and uses RDF to find LVI gadgets and add them to a MachineGadgetGraph.

More specifically, a new X86 machine pass finds Load Value Injection (LVI) gadgets consisting of a load from memory (i.e., SOURCE), and any operation that may transmit the value loaded from memory over a covert channel, or use the value loaded from memory to determine a branch/call target (i.e., SINK).

Also adds a new target feature to X86: +lvi-load-hardening

The feature can be added via the clang CLI using -mlvi-hardening.

Differential Revision: https://reviews.llvm.org/D75936