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in gcc by https://gcc.gnu.org/ml/gcc-cvs/2018-04/msg00534.html.
The -mibt feature flag is being removed, and the -fcf-protection
option now also defines a CET macro and causes errors when used
on non-X86 targets, while X86 targets no longer check for -mibt
and -mshstk to determine if -fcf-protection is supported. -mshstk
is now used only to determine availability of shadow stack intrinsics.
Comes with an LLVM patch (D46882).
Patch by mike.dvoretsky
Differential Revision: https://reviews.llvm.org/D46881
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@332704 91177308-0d34-0410-b5e6-96231b3b80d8
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The patch adds nocf_check target independent attribute for disabling checks that were enabled by cf-protection flag.
The attribute can be appertained to functions and function pointers.
Attribute name follows GCC's similar attribute name.
Differential Revision: https://reviews.llvm.org/D41880
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@327768 91177308-0d34-0410-b5e6-96231b3b80d8
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Otherwise the test fails when LLVM sources are on a read-only partition.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@322082 91177308-0d34-0410-b5e6-96231b3b80d8
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Cf-protection is a target independent flag that instructs the back-end to instrument control flow mechanisms like: Branch, Return, etc.
For example in X86 this flag will be used to instrument Indirect Branch Tracking instructions.
Differential Revision: https://reviews.llvm.org/D40478
Change-Id: I5126e766c0e6b84118cae0ee8a20fe78cc373dea
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@322063 91177308-0d34-0410-b5e6-96231b3b80d8
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