access memblock_alloc()ed memory inside vmcore-dmesg

[Prasad Koya]

Hi

I'm passing kernel cmdline log_buf_len to increase dmesg buffer size.
This causes kernel to make log_buf use memblock_alloc()ed memory and
orphan __log_buf. How do I access memblock_alloc()ed memory in
vmcore-dmesg? With existing kexec tools, I get this error:

No program header covering vaddr 0xffff88024ff00000found kexec bug?

Appreciate any pointers. I can work on it and send the code for review.

Thank you.