From: Heinrich Schuchardt Date: Sun, 29 Sep 2024 14:02:33 +0000 (+0200) Subject: riscv: efi: Set NX compat flag in PE/COFF header X-Git-Tag: v6.12-rc6~25^2~5 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=d41373a4b910961df5a5e3527d7bde6ad45ca438;p=thirdparty%2Fkernel%2Flinux.git riscv: efi: Set NX compat flag in PE/COFF header The IMAGE_DLLCHARACTERISTICS_NX_COMPAT informs the firmware that the EFI binary does not rely on pages that are both executable and writable. The flag is used by some distro versions of GRUB to decide if the EFI binary may be executed. As the Linux kernel neither has RWX sections nor needs RWX pages for relocation we should set the flag. Cc: Ard Biesheuvel Cc: Signed-off-by: Heinrich Schuchardt Reviewed-by: Emil Renner Berthing Fixes: cb7d2dd5612a ("RISC-V: Add PE/COFF header for EFI stub") Acked-by: Ard Biesheuvel Link: https://lore.kernel.org/r/20240929140233.211800-1-heinrich.schuchardt@canonical.com Signed-off-by: Palmer Dabbelt --- diff --git a/arch/riscv/kernel/efi-header.S b/arch/riscv/kernel/efi-header.S index 515b2dfbca75b..c5f17c2710b58 100644 --- a/arch/riscv/kernel/efi-header.S +++ b/arch/riscv/kernel/efi-header.S @@ -64,7 +64,7 @@ extra_header_fields: .long efi_header_end - _start // SizeOfHeaders .long 0 // CheckSum .short IMAGE_SUBSYSTEM_EFI_APPLICATION // Subsystem - .short 0 // DllCharacteristics + .short IMAGE_DLL_CHARACTERISTICS_NX_COMPAT // DllCharacteristics .quad 0 // SizeOfStackReserve .quad 0 // SizeOfStackCommit .quad 0 // SizeOfHeapReserve