[Xen-devel] The entry of Xen's exception handler

[Xinxin Jin <xinxinjin89@xxxxxxxxx>]

Hi, I am trying to understand the exception handler of Xen. In xen/arch/x86/x86_64/entry.S, the entry of the page fault handler is :

ENTRY(page_fault)

        movl  $TRAP_page_fault,4(%rsp)

        jmp   handle_exception

Here I did not get why to put the exception vector ($TRAP_page_fault) to stack before calling handle_exception?

Thanks,

--
Xinxin

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