On Thu, Mar 27, 2014 at 06:25:48PM +0800, WANG Chao wrote: [..] > @@ -169,6 +200,31 @@ static int get_kernel_vaddr_and_size(struct kexec_info *UNUSED(info), > } > } > } > + > + /* Go through /proc/kcore again. This time we find the region > + * where _stext symbol is located in */ Hi Chao, How about doing it reverse. Using _stext seems to be the right thing to do both for kaslr enabled as well as kaslr disabled kernel. Right now assuming that kernel text mapping fall in a certain area is a hack and will break if kernel addresses are shifted again for whatever reason. So we can first look for kernel mapping using _stext. If /proc/kallsyms is not present, then we can fall back using hardcoded address range between X86_64__START_KERNEL_map and X86_64__START_KERNEL_map + X86_64_KERNEL_TEXT_SIZE. Thanks Vivek
