wireguard-openbsd/gnu/llvm/lib/Target/X86/X86FixupGadgets.cpp, branch jd/queueboosts WireGuard implementation for the OpenBSD kernel https://git.zx2c4.com/wireguard-openbsd/atom/gnu/llvm/lib/Target/X86/X86FixupGadgets.cpp?h=jd%2Fqueueboosts 2019-06-23T22:05:08Z Merge LLVM 8.0.0 release. 2019-06-23T22:05:08Z patrick patrick@openbsd.org 2019-06-23T22:05:08Z urn:sha1:f27a781c9811da94fe68b2cf34237c2a61b48c96 Prepared with help from jsg@ and mortimer@ Tested on amd64 by bcallah@, krw@, naddy@ Tested on arm64 by patrick@ Tested on macppc by kettenis@ Tested on octeon by visa@ Tested on sparc64 by claudio@ Improve the X86FixupGadgets pass: 2019-02-22T15:28:43Z mortimer mortimer@openbsd.org 2019-02-22T15:28:43Z urn:sha1:0017d4a5e20bf19806a71a78981e46c0b6fea939 - Target all four kinds of return bytes (c2, c3, ca, cb) - Fix up instructions using both ModR/M and SIB bytes - Force alignment before instructions with return bytes in immediates - Force alignment before instructions that have return bytes in their encoding - Add a command line switch to toggle the functionality. ok deraadt@ Merge LLVM 7.0.1 release. 2019-01-27T16:55:35Z patrick patrick@openbsd.org 2019-01-27T16:55:35Z urn:sha1:5072e66b18f5d3ac6abf1c18a092e85eab2d7568 With fixes from mortimer@ (thanks!) Tested by many, especially naddy@ (thanks!) Add a clang pass that identifies potential ROP gadgets and replaces ROP 2018-04-28T23:00:28Z mortimer mortimer@openbsd.org 2018-04-28T23:00:28Z urn:sha1:c0f0c565f0b312e55b410ba69f4b621a01ef54cb friendly instructions with safe alternatives. This initial commit fixes 3 instruction forms that will lower to include a c3 (return) byte. Additional problematic instructions can be fixed incrementally using this framework. ok deraadt@