Assembly 在Grub2中引导自定义内核
我想用Grub2启动一个自定义内核。我使用了旧的(grub 1)多引导头:Assembly 在Grub2中引导自定义内核,assembly,x86,osdev,multiboot,Assembly,X86,Osdev,Multiboot,我想用Grub2启动一个自定义内核。我使用了旧的(grub 1)多引导头: .set flags, 0x0 .set magic, 0x1badb002 .set checksum, -(magic + flags) .align 4 .long magic .long flags .long checksum ... movl %eax, magic .set flags, 0x0 .set magic, 0xe85250d6 .set magic_the_second, 0x36d7
.set flags, 0x0
.set magic, 0x1badb002
.set checksum, -(magic + flags)
.align 4
.long magic
.long flags
.long checksum
...
movl %eax, magic
.set flags, 0x0
.set magic, 0xe85250d6
.set magic_the_second, 0x36d76289
.set checksum, -(magic + flags)
.align 4
.long magic
.long flags
.long checksum
...
movl %eax, magic_the_second
但它不适用于Grub2,因此我搜索了新的多引导规范并找到了它:
(这不是真正的规范,只是一个头文件)
所以,现在我使用这个多引导头:
.set flags, 0x0
.set magic, 0x1badb002
.set checksum, -(magic + flags)
.align 4
.long magic
.long flags
.long checksum
...
movl %eax, magic
.set flags, 0x0
.set magic, 0xe85250d6
.set magic_the_second, 0x36d76289
.set checksum, -(magic + flags)
.align 4
.long magic
.long flags
.long checksum
...
movl %eax, magic_the_second
但它也不起作用:
没有多引导头
有什么建议吗
谢谢 Multiboot 2使用与原始Multiboot不同的结构(即,它使用标记结构) 下面是我以前的一个项目的示例标题:
# multiboot 2 header (see http://download-mirror.savannah.gnu.org/releases/grub/phcoder/multiboot.pdf)
.balign 8
mbhdr:
.long 0xe85250d6 # magic
.long 0 # architecture (i386, 32-bit)
.long .LhdrEnd-mbhdr # header length
.long -(.LhdrEnd-mbhdr+0xe85250d6) # checksum
# tags
# module align
.word 6 # type
.word 0 # flags
.long 8 # size in bytes (spec says 12?)
.balign 8
# loader entry
.word 3
.word 0
.long 12
.long entry
.balign 8
# console flags
.word 4
.word 0
.long 12
.long 0x03 # EGA text support, require console
.balign 8
# info request
.word 1
.word 0
.long 4*6+8
.long 5 # BIOS boot device
.long 1 # command line
.long 3 # modules
.long 9 # ELF symbols
.long 6 # memory map
.long 10 # APM table
.balign 8
# address info
.word 2 # type
.word 0 # flags
.long 24 # size
.long mbhdr # header load addr
.long 0x100000 # load addr
.long 0 # load end addr (entire file)
.long 0 # BSS end addr (no BSS)
.balign 8
# terminating tag
.word 0
.word 0
.long 8
.LhdrEnd:
谢谢,但是否需要所有信息?或者从#multiboot 2 header到#tags?我认为加载器条目和地址信息是所有需要的(当然还有结尾的),但是我会检查代码中的链接,以确保如果内核是ELF格式的,那么除了终止标记之外,不需要其他标记。