75c7843086
Most patch merges inspired from patrick's work on base-clang. Consumer ports fixed/marked BROKEN as discussed with bcallah@ and rsadowski@. powerpc tests and PLIST fixes from cwen@, thanks! rust-1.36 tests by semarie@
23 lines
925 B
Plaintext
23 lines
925 B
Plaintext
$OpenBSD: patch-lib_Target_X86_X86_h,v 1.3 2019/07/06 15:06:36 jca Exp $
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Add a clang pass that identifies potential ROP gadgets and replaces ROP
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friendly instructions with safe alternatives. This initial commit fixes
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3 instruction forms that will lower to include a c3 (return) byte.
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Additional problematic instructions can be fixed incrementally using
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this framework.
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Index: lib/Target/X86/X86.h
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--- lib/Target/X86/X86.h.orig
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+++ lib/Target/X86/X86.h
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@@ -115,6 +115,10 @@ FunctionPass *createX86FixupBWInsts();
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/// to another, when profitable.
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FunctionPass *createX86DomainReassignmentPass();
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+/// Return a Machine Function pass that attempts to replace
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+/// ROP friendly instructions with alternatives.
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+FunctionPass *createX86FixupGadgetsPass();
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+
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/// This pass replaces EVEX encoded of AVX-512 instructiosn by VEX
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/// encoding when possible in order to reduce code size.
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FunctionPass *createX86EvexToVexInsts();
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