2018-07-12 14:56:34 +00:00
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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2018-07-10 19:08:14 +00:00
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From: Leif Lindholm <leif.lindholm@linaro.org>
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Date: Thu, 1 Feb 2018 18:18:55 +0000
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Subject: [PATCH] arm: switch linux loader to linux_arm_kernel_header struct
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Use kernel header struct and magic definition to align (and coexist) with
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i386/arm64 ports.
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Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
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Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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---
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grub-core/loader/arm/linux.c | 11 +++++------
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include/grub/arm/linux.h | 15 ++++++++++++---
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2 files changed, 17 insertions(+), 9 deletions(-)
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diff --git a/grub-core/loader/arm/linux.c b/grub-core/loader/arm/linux.c
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index e64c79a9577..9f43e41bb55 100644
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--- a/grub-core/loader/arm/linux.c
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+++ b/grub-core/loader/arm/linux.c
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@@ -46,9 +46,6 @@ static const void *current_fdt;
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typedef void (*kernel_entry_t) (int, unsigned long, void *);
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-#define LINUX_ZIMAGE_OFFSET 0x24
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-#define LINUX_ZIMAGE_MAGIC 0x016f2818
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-
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#define LINUX_PHYS_OFFSET (0x00008000)
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#define LINUX_INITRD_PHYS_OFFSET (LINUX_PHYS_OFFSET + 0x02000000)
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#define LINUX_FDT_PHYS_OFFSET (LINUX_INITRD_PHYS_OFFSET - 0x10000)
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@@ -315,6 +312,7 @@ linux_boot (void)
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static grub_err_t
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linux_load (const char *filename, grub_file_t file)
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{
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+ struct linux_arm_kernel_header *lh;
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int size;
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size = grub_file_size (file);
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@@ -337,9 +335,10 @@ linux_load (const char *filename, grub_file_t file)
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return grub_errno;
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}
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- if (size > LINUX_ZIMAGE_OFFSET + 4
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- && *(grub_uint32_t *) (linux_addr + LINUX_ZIMAGE_OFFSET)
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- == LINUX_ZIMAGE_MAGIC)
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+ lh = (void *) linux_addr;
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+
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+ if ((grub_size_t) size > sizeof (*lh) &&
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+ lh->magic == GRUB_LINUX_ARM_MAGIC_SIGNATURE)
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;
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else if (size > 0x8000 && *(grub_uint32_t *) (linux_addr) == 0xea000006
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&& machine_type == GRUB_ARM_MACHINE_TYPE_RASPBERRY_PI)
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diff --git a/include/grub/arm/linux.h b/include/grub/arm/linux.h
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index 3706c46c66f..64dd3173cf7 100644
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--- a/include/grub/arm/linux.h
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+++ b/include/grub/arm/linux.h
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@@ -20,11 +20,20 @@
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#ifndef GRUB_ARM_LINUX_HEADER
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#define GRUB_ARM_LINUX_HEADER 1
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-#define LINUX_ZIMAGE_OFFSET 0x24
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-#define LINUX_ZIMAGE_MAGIC 0x016f2818
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-
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#include "system.h"
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+#define GRUB_LINUX_ARM_MAGIC_SIGNATURE 0x016f2818
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+
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+struct linux_arm_kernel_header {
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+ grub_uint32_t code0;
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+ grub_uint32_t reserved1[8];
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+ grub_uint32_t magic;
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+ grub_uint32_t start; /* _start */
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+ grub_uint32_t end; /* _edata */
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+ grub_uint32_t reserved2[4];
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+ grub_uint32_t hdr_offset;
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+};
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+
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#if defined GRUB_MACHINE_UBOOT
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# include <grub/uboot/uboot.h>
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# define LINUX_ADDRESS (start_of_ram + 0x8000)
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