Hello everyone? I got some trouble in porting kexectools to powerpc 8541 ,with kernel 2.6.21.7 Detail : In Machine_kexec_32.c , function "default_machine_kexec", the second parameter of function reboot_code, which is reboot_code_buffer_phys , causing an instruction error in arch/powerpc/misc_32.s when executing instruction "rfi" (Line 894) After I changed reboot_code_buffer_phys into reboot_code_buffer(rather than a physial address) , the code go on ,but caused another error of " kernel stack overflow". I don't how to solve this problem,any suggestion would be grateful. here are my steps: # kexec -l uImage --devtree=your.fdt.dtb --devtree_addr=0x800000 Image Name: Linux-2.6.21.7 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 1190265 Bytes = Load Address: 00000000 Entry Point: 00000000 # kexec -e Starting new kernel virtual address: cfc09000 physical address: fc09000 calling function: reboot_code(page_list=0xfc08002, reboot_code_buffer_phys=0xfc09000, image->start=0x0,image->segment [1].mem=0x800000) Unable to handle kernel paging request for instruction fetch Faulting instruction address: 0x0fc09028
