Please please help me. Hello, I am still hacking the kexec-tool over SH4 platform using Paul suggests, but I have still the problem. First I try to change the flags passed to kexec_load(..,..,..,kexec_flags). In kexec-tools it was set to KEXEC_ARCH_DEFAULT; I set it KEXEC_ARCH_SH as well as in kernel include/linux/kexec.h Then I changed the: P1 (0x80000000) + memory start (0x0c000000) + 0x00210000 or'ed in zImage_sh_load() that you suggested in such way: CONFIG_PAGE_OFFSET(0x80000000) + CONFIG_MEMORY_START (0x04400000) + CONFIG_BOOT_LINK_OFFSET (0x0080000) and I changed the initiliaziation start memory range to set available my CONFIG_MEMORY_START address. The log that I got is the follow and I can?t see the new kernel really restating, after I lauch ./kexec -l new_zImage --type=zImage-sh --append="console=ttyAS1,115200" --empty-zero=84401000 The log.... .... empty_zero = 0x04401000 area = 0x04400000 Starting new kernel kexec information segment[0]: 0x04401000 - 0x04402000 (0x00001000) segment[1]: 0x04c00000 - 0x04d5a000 (0x0015a000) start : 0x84c00000 Can you still see any error? Sincerely Paolo Cortesi > Hi, > my name is Paolo Cortesi I'am working over one SH4 platform board ST71XX with linux kernel 2.6.17. > > I need to spawn a new Linux kernel over the Linux Kernel which is running, without the overhead of boot firmware, and I think that your kexec-tool could be suitable for this target. > > I try to use kexec following the steps: > > 1) I select the CONFIG_KEXEC option while building the runnig kernel. > > 2) I download your last recent version of kexec-tool which support SH4 platform > > I used your .gz reachable by link: > http://www.vergenet.net/linux/kexec/kexec-tools/ > > 3) I launch the the configure by my script: > > export CC=sh4-linux-uclibc-gcc > export LD=sh4-linux-uclibc-ld > export AR=sh4-linux-uclibc-ar > export CFLAGS="-DSHLINUX -D__SHLINUX__ -Wall -O2 -ml -m4 -pipe -fomit-frame-pointer -fno-strict-aliasing" > ./configure --host=sh4-linux > > 4) I cross compile. During compilation I comment the invoke of /*crash_setup_regs(&fixed_regs, regs);*/ procedure that's called in crash_kexec procedure of kernel/kexec.c file (I could not find any implementation of this procedure). > > 5) I launch the runnig kernel, which execute: > kexec -l new_zImage --./kexec -l zImage --type=zImage-sh --append="command_line" > kexec -e > > Should be the wright procedure. > > But I have one NULL pointer deferenced when it?s called the last assembler procedure > reboot_code_buffer (relocate_new_kernel) which is invoked in the kernel C procedure arch/sh/... machine_kexec.c > > Have you got an idea of the problem? Have you ever run your tool using one intrd kernel running > > Thanks in advance. > > Paolo Cortesi. > > > _______________________________________________ > kexec mailing list > kexec at lists.infradead.org > http://lists.infradead.org/mailman/listinfo/kexec >
