[PATCH] D87544: [CFGuard] Add address-taken IAT tables and delay-load support
Andrew Paverd via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Fri Sep 11 12:41:55 PDT 2020
ajpaverd created this revision.
ajpaverd added reviewers: rnk, ruiu, amccarth, theraven.
Herald added subscribers: llvm-commits, rupprecht, hiraditya.
Herald added a reviewer: jhenderson.
Herald added a project: LLVM.
ajpaverd requested review of this revision.
Herald added a subscriber: MaskRay.
This patch adds support for creating Guard Address-Taken IAT Entry Tables (.giats$y sections) in object files, matching the behavior of MSVC. These contain lists of address-taken imported functions, which are used by the linker to create the final GIATS table.
Additionally, if any DLLs are delay-loaded, the linker must look through the .giats tables and add the respective load thunks of address-taken imports to the GFIDS table, as these are also valid call targets.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D87544
Files:
lld/COFF/DLL.cpp
lld/COFF/ICF.cpp
lld/COFF/InputFiles.cpp
lld/COFF/InputFiles.h
lld/COFF/Symbols.h
lld/COFF/Writer.cpp
lld/test/COFF/giats.s
llvm/include/llvm/MC/MCObjectFileInfo.h
llvm/lib/CodeGen/AsmPrinter/WinCFGuard.cpp
llvm/lib/MC/MCObjectFileInfo.cpp
llvm/test/CodeGen/WinCFGuard/cfguard-giats.ll
llvm/tools/llvm-readobj/COFFDumper.cpp
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