grub2/0110-arm-switch-linux-loader-to-linux_arm_kernel_header-s.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Leif Lindholm <leif.lindholm@linaro.org>
Date: Thu, 1 Feb 2018 18:18:55 +0000
Subject: [PATCH] arm: switch linux loader to linux_arm_kernel_header struct
Use kernel header struct and magic definition to align (and coexist) with
i386/arm64 ports.
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
---
grub-core/loader/arm/linux.c | 11 +++++------
include/grub/arm/linux.h | 15 ++++++++++++---
2 files changed, 17 insertions(+), 9 deletions(-)
diff --git a/grub-core/loader/arm/linux.c b/grub-core/loader/arm/linux.c
index e64c79a9577..9f43e41bb55 100644
--- a/grub-core/loader/arm/linux.c
+++ b/grub-core/loader/arm/linux.c
@@ -46,9 +46,6 @@ static const void *current_fdt;
typedef void (*kernel_entry_t) (int, unsigned long, void *);
-#define LINUX_ZIMAGE_OFFSET 0x24
-#define LINUX_ZIMAGE_MAGIC 0x016f2818
-
#define LINUX_PHYS_OFFSET (0x00008000)
#define LINUX_INITRD_PHYS_OFFSET (LINUX_PHYS_OFFSET + 0x02000000)
#define LINUX_FDT_PHYS_OFFSET (LINUX_INITRD_PHYS_OFFSET - 0x10000)
@@ -315,6 +312,7 @@ linux_boot (void)
static grub_err_t
linux_load (const char *filename, grub_file_t file)
{
+ struct linux_arm_kernel_header *lh;
int size;
size = grub_file_size (file);
@@ -337,9 +335,10 @@ linux_load (const char *filename, grub_file_t file)
return grub_errno;
}
- if (size > LINUX_ZIMAGE_OFFSET + 4
- && *(grub_uint32_t *) (linux_addr + LINUX_ZIMAGE_OFFSET)
- == LINUX_ZIMAGE_MAGIC)
+ lh = (void *) linux_addr;
+
+ if ((grub_size_t) size > sizeof (*lh) &&
+ lh->magic == GRUB_LINUX_ARM_MAGIC_SIGNATURE)
;
else if (size > 0x8000 && *(grub_uint32_t *) (linux_addr) == 0xea000006
&& machine_type == GRUB_ARM_MACHINE_TYPE_RASPBERRY_PI)
diff --git a/include/grub/arm/linux.h b/include/grub/arm/linux.h
index 3706c46c66f..64dd3173cf7 100644
--- a/include/grub/arm/linux.h
+++ b/include/grub/arm/linux.h
@@ -20,11 +20,20 @@
#ifndef GRUB_ARM_LINUX_HEADER
#define GRUB_ARM_LINUX_HEADER 1
-#define LINUX_ZIMAGE_OFFSET 0x24
-#define LINUX_ZIMAGE_MAGIC 0x016f2818
-
#include "system.h"
+#define GRUB_LINUX_ARM_MAGIC_SIGNATURE 0x016f2818
+
+struct linux_arm_kernel_header {
+ grub_uint32_t code0;
+ grub_uint32_t reserved1[8];
+ grub_uint32_t magic;
+ grub_uint32_t start; /* _start */
+ grub_uint32_t end; /* _edata */
+ grub_uint32_t reserved2[4];
+ grub_uint32_t hdr_offset;
+};
+
#if defined GRUB_MACHINE_UBOOT
# include <grub/uboot/uboot.h>
# define LINUX_ADDRESS (start_of_ram + 0x8000)