From 18dd984c56b339be74e390df80fd3dc21b7a9b58 Mon Sep 17 00:00:00 2001 From: Heinrich Schuchardt Date: Fri, 29 Jan 2021 12:35:51 +0100 Subject: [PATCH] efi_loader: add Linux magic to aarch64 crt0 Add the Linux magic to the EFI file header to allow running our test programs with GRUB's linux command. Now we can dump the fixed-up device tree with our dtbdump.efi tool. Signed-off-by: Heinrich Schuchardt --- arch/arm/lib/crt0_aarch64_efi.S | 3 ++- include/asm-generic/pe.h | 2 ++ 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/arm/lib/crt0_aarch64_efi.S b/arch/arm/lib/crt0_aarch64_efi.S index 368933ecf2..492195f765 100644 --- a/arch/arm/lib/crt0_aarch64_efi.S +++ b/arch/arm/lib/crt0_aarch64_efi.S @@ -18,7 +18,8 @@ .globl ImageBase ImageBase: .short IMAGE_DOS_SIGNATURE /* 'MZ' */ - .skip 58 /* 'MZ' + pad + offset == 64 */ + .skip 54 /* 'MZ' + pad + offset == 64 */ + .long LINUX_ARM64_MAGIC /* For GRUB's linux command */ .long pe_header - ImageBase /* Offset to the PE header */ pe_header: .long IMAGE_NT_SIGNATURE /* 'PE' */ diff --git a/include/asm-generic/pe.h b/include/asm-generic/pe.h index b247519a3d..a1df747134 100644 --- a/include/asm-generic/pe.h +++ b/include/asm-generic/pe.h @@ -51,4 +51,6 @@ #define IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER 12 #define IMAGE_SUBSYSTEM_EFI_ROM 13 +#define LINUX_ARM64_MAGIC 0x644d5241 + #endif /* _ASM_PE_H */ -- 2.39.5