On 11/04/22 at 09:03am, lizhijian@xxxxxxxxxxx wrote: > Hi folks, > > I'm trying to add pmem's metadata(located at pmem device) to > /proc/vmcore. To accomplish this, I think > > something i need to know is where the contents of /proc/vmcore come > from, and then append > > something into it. > > I have read > https://opensource.com/article/17/6/kdump-usage-and-internals, and knew > /proc/vmcore is a elf file. > > It mentioned that "Creates /proc/vmcore as per elfcorehdr information > received", but i don't get how it > > elfcorehdr(maybe elfcorehdr_addr) be assigned in 2nd kernel. > > I tried to grep it in the kernel source, but still no answer. So i deep > hope you guys can give me some hints or answer. Since you have studied this, so: crash_prepare_elf64_headers() is the place where elf header of vmcore is contructed in 1st kernel. And in crash_load_segments() it's prepared to be passed out. I am talking about x86, and kexec_file load. You should be able to find the similar thing in user space code. _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
