In comparison to ELF the PE format is not supported by the Multiboot protocol. So, if we wish to load xen.mb.efi using this protocol we have to put header_addr, load_addr, load_end_addr, bss_end_addr and entry_addr data into Multiboot header.
The Multiboot protocol spec can be found at https://www.gnu.org/software/grub/manual/multiboot/ Signed-off-by: Daniel Kiper <daniel.ki...@oracle.com> --- v2 - suggestions/fixes: - add the pointer to the Multiboot protocol spec to the commit message (suggested by Konrad Rzeszutek Wilk). --- xen/arch/x86/boot/head.S | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/xen/arch/x86/boot/head.S b/xen/arch/x86/boot/head.S index 47f254d..3ed43d9 100644 --- a/xen/arch/x86/boot/head.S +++ b/xen/arch/x86/boot/head.S @@ -201,13 +201,24 @@ ENTRY(start) .balign 4 multiboot1_header: /*** MULTIBOOT1 HEADER ****/ #define MULTIBOOT_HEADER_FLAGS (MULTIBOOT_HEADER_MODS_ALIGNED | \ - MULTIBOOT_HEADER_WANT_MEMORY) + MULTIBOOT_HEADER_WANT_MEMORY | \ + MULTIBOOT_HEADER_HAS_ADDR) /* Magic number indicating a Multiboot header. */ .long MULTIBOOT_HEADER_MAGIC /* Flags to bootloader (see Multiboot spec). */ .long MULTIBOOT_HEADER_FLAGS /* Checksum: must be the negated sum of the first two fields. */ .long -(MULTIBOOT_HEADER_MAGIC + MULTIBOOT_HEADER_FLAGS) + /* header_addr */ + .long sym_offs(multiboot1_header) + /* load_addr */ + .long sym_offs(start) + /* load_end_addr */ + .long sym_offs(__bss_start) + /* bss_end_addr */ + .long sym_offs(__2M_rwdata_end) + /* entry_addr */ + .long sym_offs(__start) .size multiboot1_header, . - multiboot1_header .type multiboot1_header, @object -- 1.7.10.4 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
