Hi, I'm studying the kexec code and try to figure out where is the best place to grab these informations: kernel image start address, kernel load address/kernel entry point. I've read the kexec-tools code, most precisely do_bzImage_load function and purgatory/entry64.S, entry64-32.S and setup-x86_64.S. I found some informations there as this regs32.eip = kernel32_load_address assign where I'm assuming it's the kernel entry point that I'm looking for. But I'm also staring in this code on entry64-32.S to understand what it does: ljmp *%cs:entry32_addr - entry32 As I'm not good in asm I don't understand what it does. I saw that assign regs32.eip = 0x1000000 /* kernel32_load_address */ first in do_bzImage_load so in .S file I saw it moves eip to %eax does that asm mentioned, and in the end jump to what it calls loaded image. I'm assuming it as the new kernel entry point, the address that I'm looking to grab, but not sure if it is the the whole *%cs:entry32_addr - entry32 or just the first assign (0x1000000). Beyond that I have this real_mode->kernel_start, that to me seems be the start point in the kernel image, but is just set up if kernel will run in real mode. So is there no way to grab start image address except it runs in real mode? Regardless entry point address I also read this thread http://lists.infradead.org/pipermail/kexec/2012-June/006394.html, I noticed that this kernel32_load_address seems be just the first address to where the purgatory jumps to then new kernel starts and in some moment relocate itself. (guesses). My whole point is if my guesses here is correct, if this address are related to what I want or I'm misunderstanding everything. Thanks in advance Leonidas --
