Messages in this thread | | | From | Andi Kleen <> | Subject | Re: [PATCH][RFC] x86_64: Reload CS when startup_64 is used. | Date | Mon, 21 Aug 2006 12:19:09 +0200 |
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> > + /* Reload CS with a value that is within our GDT. We need to do this > + * if we were loaded by a 64 bit bootloader that happened to use a > + * CS that is larger than the GDT limit. This is true if we came here > + * from kexec running under Xen. > + */ > + movq %rsp, %rdx > + movq $__KERNEL_DS, %rax > + pushq %rax /* SS */ > + pushq %rdx /* RSP */ > + movq $__KERNEL_CS, %rax > + movq $cs_reloaded, %rdx > + pushq %rax /* CS */ > + pushq %rdx /* RIP */ > + lretq
Can't you just use a normal far jump? That might be simpler.
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