[v2] Enable BTI support in memory attributes table

[edk2-devel] [PATCH v2 12/17] ArmPlatformPkg/PrePeiCore: Make vector table object BTI compatible

Posted by Ard Biesheuvel 1 year, 5 months ago

The object file containing the vector table does not contain any
callable functions, so it will not be implicitly annotated as BTI
compatible on BTI builds. So add the annotation by hand, and use the
'empty' type so we get the GNU ELF note but not the actual BTI opcode.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 ArmPlatformPkg/PrePeiCore/AArch64/Exception.S | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ArmPlatformPkg/PrePeiCore/AArch64/Exception.S b/ArmPlatformPkg/PrePeiCore/AArch64/Exception.S
index 43e40f97c3eed5ff..5a84fefe3fb55216 100644
--- a/ArmPlatformPkg/PrePeiCore/AArch64/Exception.S
+++ b/ArmPlatformPkg/PrePeiCore/AArch64/Exception.S
@@ -112,3 +112,5 @@ _DefaultSError_LowerA32:
   TO_HANDLER
 
 VECTOR_END(PeiVectorTable)
+
+AARCH64_BTI()
-- 
2.39.2



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