Messages in this thread Patch in this message | | | From | Peter Jones <> | Subject | [PATCH] x86: Set the NX-compatibility flag in the PE header | Date | Tue, 29 Mar 2022 14:47:43 -0400 |
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Following Baskov Evgeniy's "Handle UEFI NX-restricted page tables" patches, it's safe to set this compatibility flag to let loaders know they don't need to make special accommodations for kernel to load if pre-boot NX is enabled.
Signed-off-by: Peter Jones <pjones@redhat.com> --- arch/x86/boot/header.S | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/arch/x86/boot/header.S b/arch/x86/boot/header.S index 6dbd7e9f74c..0352e4589ef 100644 --- a/arch/x86/boot/header.S +++ b/arch/x86/boot/header.S @@ -163,7 +163,11 @@ extra_header_fields: .long 0x200 # SizeOfHeaders .long 0 # CheckSum .word IMAGE_SUBSYSTEM_EFI_APPLICATION # Subsystem (EFI application) +#ifdef CONFIG_DXE_MEM_ATTRIBUTES + .word IMAGE_DLL_CHARACTERISTICS_NX_COMPAT # DllCharacteristics +#else .word 0 # DllCharacteristics +#endif #ifdef CONFIG_X86_32 .long 0 # SizeOfStackReserve .long 0 # SizeOfStackCommit -- 2.35.1
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