linux内核set_base分析

Posted 2020-09-20

在分析linux中的set_base之前，我们定义 ；eax is TSS0 offset address ；ebx is kernel_base address 0x10000 ；ecx is gdt_address ；edi is TSS0_SEL 0x20 set_base: addl %ebx, %eax ; eax = eax + ebx = 0x10000 + TSS0 offset address addl %ecx, %edi ; edi = edi + ecx = gdt_address + TSS0_SEL movw %ax, 2(%edi) ; *(shou*)((char*)edi + 2) = eax的低位 rorl $16, %eax ; 将eax的高低16位颠倒 movb %al, 4(%edi) movb %ah, 7(%edi) rorl $16, %eax ret