Protocal 2.13 (Kernel 3.14) supports xloadflags to check the kernel
supported boot loader. It's also kernel recommended to use.
---
include/grub/i386/linux.h | 19 +++++++++++++++----
1 file changed, 15 insertions(+), 4 deletions(-)
diff --git a/include/grub/i386/linux.h b/include/grub/i386/linux.h
index 0fd6e1212..a868d115c 100644
--- a/include/grub/i386/linux.h
+++ b/include/grub/i386/linux.h
@@ -92,7 +92,7 @@ enum
GRUB_VIDEO_LINUX_TYPE_SIMPLE = 0x70 /* Linear framebuffer without any
additional functions. */
};
-/* For the Linux/i386 boot protocol version 2.10. */
+/* For the Linux/i386 boot protocol version 2.13. */
struct linux_i386_kernel_header
{
grub_uint8_t code1[0x0020];
@@ -138,6 +138,12 @@ struct linux_i386_kernel_header
grub_uint32_t kernel_alignment;
grub_uint8_t relocatable;
grub_uint8_t min_alignment;
+ grub_uint16_t xloadflags; /* Boot protocol option flags */
+#define LINUX_XLF_KERNEL_64 (1 << 0)
+#define LINUX_XLF_CAN_BE_LOADED_ABOVE_4G (1 << 1)
+#define LINUX_XLF_EFI_HANDOVER_32 (1 << 2)
+#define LINUX_XLF_EFI_HANDOVER_64 (1 << 3)
+#define LINUX_XLF_EFI_KEXEC (1 << 4)
grub_uint8_t pad[2];
grub_uint32_t cmdline_size;
grub_uint32_t hardware_subarch;
@@ -147,7 +153,7 @@ struct linux_i386_kernel_header
grub_uint64_t setup_data;
grub_uint64_t pref_address;
grub_uint32_t init_size;
- grub_uint32_t handover_offset;
+ grub_uint32_t handover_offset; /* Protocal 2.11 (deprecated) */
} GRUB_PACKED;
/* Boot parameters for Linux based on 2.6.12. This is used by the setup
@@ -231,7 +237,11 @@ struct linux_kernel_params
grub_uint32_t ofw_cif_handler; /* b8 */
grub_uint32_t ofw_idt; /* bc */
- grub_uint8_t padding7[0x1b8 - 0xc0];
+ grub_uint32_t ext_ramdisk_image; /* c0 */
+ grub_uint32_t ext_ramdisk_size; /* c4 */
+ grub_uint32_t ext_cmd_line_ptr; /* c8 */
+
+ grub_uint8_t padding7[0x1b8 - 0xcc];
union
{
@@ -315,7 +325,8 @@ struct linux_kernel_params
grub_uint32_t initrd_addr_max; /* Maximum initrd address */
grub_uint32_t kernel_alignment; /* Alignment of the kernel */
grub_uint8_t relocatable_kernel; /* Is the kernel relocatable */
- grub_uint8_t pad1[3];
+ grub_uint8_t min_alignment;
+ grub_uint16_t xloadflags; /* Boot protocol option flags */
grub_uint32_t cmdline_size; /* Size of the kernel command line */
grub_uint32_t hardware_subarch;
grub_uint64_t hardware_subarch_data;
--
2.38.1
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