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| author | Andrew Paverd <andrew.paverd@microsoft.com> | 2019-10-28 13:22:19 +0000 |
|---|---|---|
| committer | David Chisnall <David.Chisnall@microsoft.com> | 2019-10-28 15:19:39 +0000 |
| commit | d157a9bc8ba1085cc4808c6941412322a7fd884e (patch) | |
| tree | c675a8e26a4bf08d0cd8abcde693780dd5bd3859 /llvm/test/CodeGen/WinCFGuard | |
| parent | a233e7d7cb642ada49985426c23aa3c6a4c98690 (diff) | |
| download | bcm5719-llvm-d157a9bc8ba1085cc4808c6941412322a7fd884e.tar.gz bcm5719-llvm-d157a9bc8ba1085cc4808c6941412322a7fd884e.zip | |
Add Windows Control Flow Guard checks (/guard:cf).
Summary:
A new function pass (Transforms/CFGuard/CFGuard.cpp) inserts CFGuard checks on
indirect function calls, using either the check mechanism (X86, ARM, AArch64) or
or the dispatch mechanism (X86-64). The check mechanism requires a new calling
convention for the supported targets. The dispatch mechanism adds the target as
an operand bundle, which is processed by SelectionDAG. Another pass
(CodeGen/CFGuardLongjmp.cpp) identifies and emits valid longjmp targets, as
required by /guard:cf. This feature is enabled using the `cfguard` CC1 option.
Reviewers: thakis, rnk, theraven, pcc
Subscribers: ychen, hans, metalcanine, dmajor, tomrittervg, alex, mehdi_amini, mgorny, javed.absar, kristof.beyls, hiraditya, steven_wu, dexonsmith, cfe-commits, llvm-commits
Tags: #clang, #llvm
Differential Revision: https://reviews.llvm.org/D65761
Diffstat (limited to 'llvm/test/CodeGen/WinCFGuard')
| -rw-r--r-- | llvm/test/CodeGen/WinCFGuard/cfguard.ll | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/llvm/test/CodeGen/WinCFGuard/cfguard.ll b/llvm/test/CodeGen/WinCFGuard/cfguard.ll index 2ddd3463219..1018c1fa62c 100644 --- a/llvm/test/CodeGen/WinCFGuard/cfguard.ll +++ b/llvm/test/CodeGen/WinCFGuard/cfguard.ll @@ -1,4 +1,5 @@ -; RUN: llc < %s | FileCheck %s +; RUN: llc < %s -mtriple=x86_64-pc-windows-msvc | FileCheck %s +; Control Flow Guard is currently only available on Windows ; CHECK: .set @feat.00, 2048 @@ -159,6 +160,6 @@ attributes #2 = { nounwind } !llvm.module.flags = !{!0, !1} !llvm.ident = !{!2} -!0 = !{i32 2, !"cfguardtable", i32 1} +!0 = !{i32 2, !"cfguard", i32 1} !1 = !{i32 1, !"wchar_size", i32 2} !2 = !{!"clang version 6.0.0 "} |
