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| author |   Peter Jones <pjones@redhat.com> | 2022-03-29 14:47:43 -0400 |
|---|---|---|
| committer |   Ard Biesheuvel <ardb@kernel.org> | 2022-05-03 15:31:28 +0200 |
| commit | 24b72bb12e84c75e297a5a81f24b921d7a011575 (patch) | |
| tree | 449d19a8328f6cb851f61867fc3d3f9cf70ea4c3 | |
| parent | efi: libstub: ensure allocated memory to be executable (diff) | |
| download | linux-dev-24b72bb12e84c75e297a5a81f24b921d7a011575.tar.xz linux-dev-24b72bb12e84c75e297a5a81f24b921d7a011575.zip | |
efi: x86: Set the NX-compatibility flag in the PE header
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>
Link: https://lore.kernel.org/all/20220329184743.798513-1-pjones@redhat.com/
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
| -rw-r--r-- | arch/x86/boot/header.S | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/boot/header.S b/arch/x86/boot/header.S index 6dbd7e9f74c9..0352e4589efa 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 |