[Crash-utility] question about phys_base

Hi, Dave I am implementing a new dump command in the qemu. The vmcore's format is elf(like kdump). And I try to provide phys_base in the PT_LOAD. But if the os uses the first vcpu do kdump, the value of phys_base is wrong. I find a function x86_64_virt_phys_base() in crash's code. Is it OK to call this function first? If the function successes, we do not calculate phys_base according to PT_LOAD. Thanks Wen Congyang