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Previously the setup_header length was just assumed to be the size of the linux_kernel_params struct. The linux x86 32-bit boot protocol says that the end of the linux_i386_kernel_header is at 0x202 + the byte value at 0x201 in the linux_i386_kernel_header. So, calculate the size of the header using the end of the linux_i386_kernel_header, rather than assume it is the size of the linux_kernel_params struct. Additionally, add some required members to the linux_kernel_params struct and align the content of linux_i386_kernel_header struct with it. New members naming was taken directly from Linux kernel source. linux_kernel_params and linux_i386_kernel_header structs require more cleanup. However, this is not urgent, so, let's do this after release. Just in case... Signed-off-by: Andrew Jeddeloh <andrew.jeddeloh@coreos.com> Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com> Reviewed-by: Vladimir Serbinenko <phcoder@google.com> Reviewed-by: Ross Philipson <ross.philipson@oracle.com>
This is GRUB 2, the second version of the GRand Unified Bootloader. GRUB 2 is rewritten from scratch to make GNU GRUB cleaner, safer, more robust, more powerful, and more portable. See the file NEWS for a description of recent changes to GRUB 2. See the file INSTALL for instructions on how to build and install the GRUB 2 data and program files. Please visit the official web page of GRUB 2, for more information. The URL is <http://www.gnu.org/software/grub/grub.html>. More extensive documentation is available in the Info manual, accessible using 'info grub' after building and installing GRUB 2. There are a number of important user-visible differences from the first version of GRUB, now known as GRUB Legacy. For a summary, please see: info grub Introduction 'Changes from GRUB Legacy'