grub2/0002-Arm-check-for-the-PE-magic-for-the-compiled-arch.patch

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From 337b3d963d28b3544e8817428fb68ca559613a39 Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Thu, 9 Sep 2021 10:59:28 -0400
Subject: [PATCH 2/2] Arm: check for the PE magic for the compiled arch
In "arm64: Fix EFI loader kernel image allocation", Ben fixed the kernel
alignment to match the alignment given in the PE header. In doing so, a
check for valid PE magic was added, which was hard-coded to the value
seen on Aarch64 (GRUB_PE32_PE64_MAGIC).
Unfortunately, this code is shared between 64-bit and 32-bit, and so
that value broke 32-bit Arm systems.
This patch adds a constant definition for GRUB_PE32_PEXX_MAGIC, which is
either GRUB_PE32_PE64_MAGIC or GRUB_PE32_PE32_MAGIC, depending on which
platform is being built, and uses it in the header magic check.
Resolves: rhbz#2000756
Signed-off-by: Peter Jones <pjones@redhat.com>
---
grub-core/loader/arm64/efi/linux.c | 2 +-
include/grub/arm/linux.h | 1 +
include/grub/arm64/linux.h | 1 +
3 files changed, 3 insertions(+), 1 deletion(-)
--- a/grub-core/loader/arm64/efi/linux.c
+++ b/grub-core/loader/arm64/efi/linux.c
@@ -376,7 +376,7 @@
pe = (void *)((unsigned long)kernel + lh->hdr_offset);
- if (pe->opt.magic != GRUB_PE32_PE64_MAGIC)
+ if (pe->opt.magic != GRUB_PE32_PEXX_MAGIC)
return grub_error(GRUB_ERR_BAD_OS, "Invalid PE optional header magic");
*total_size = pe->opt.image_size;
--- a/include/grub/arm/linux.h
+++ b/include/grub/arm/linux.h
@@ -33,6 +33,7 @@
};
#if defined(__arm__)
+# define GRUB_PE32_PEXX_MAGIC GRUB_PE32_PE32_MAGIC
# define grub_armxx_linux_pe_header grub_arm_linux_pe_header
#endif
--- a/include/grub/arm64/linux.h
+++ b/include/grub/arm64/linux.h
@@ -33,6 +33,7 @@
#if defined(__aarch64__)
# define GRUB_LINUX_ARMXX_MAGIC_SIGNATURE GRUB_LINUX_ARM64_MAGIC_SIGNATURE
+# define GRUB_PE32_PEXX_MAGIC GRUB_PE32_PE64_MAGIC
# define grub_armxx_linux_pe_header grub_arm64_linux_pe_header
#endif