Exemplo n.º 1
0
/*
 * Start kdump: create a LGR log entry, store status of all CPUs and
 * branch to __do_machine_kdump.
 */
static noinline void __machine_kdump(void *image)
{
	int this_cpu, cpu;

	lgr_info_log();
	/* Get status of the other CPUs */
	this_cpu = smp_find_processor_id(stap());
	for_each_online_cpu(cpu) {
		if (cpu == this_cpu)
			continue;
		if (smp_store_status(cpu))
			continue;
	}
	/* Store status of the boot CPU */
	if (MACHINE_HAS_VX)
		save_vx_regs((void *) &S390_lowcore.vector_save_area);
	/*
	 * To create a good backchain for this CPU in the dump store_status
	 * is passed the address of a function. The address is saved into
	 * the PSW save area of the boot CPU and the function is invoked as
	 * a tail call of store_status. The backchain in the dump will look
	 * like this:
	 *   restart_int_handler ->  __machine_kexec -> __do_machine_kdump
	 * The call to store_status() will not return.
	 */
	store_status(__do_machine_kdump, image);
}
Exemplo n.º 2
0
/* Store registers needed to create the signal frame */
static void store_sigregs(void)
{
    int i;

    save_access_regs(current->thread.acrs);
    save_fp_ctl(&current->thread.fp_regs.fpc);
    if (current->thread.vxrs) {
        save_vx_regs(current->thread.vxrs);
        for (i = 0; i < __NUM_FPRS; i++)
            current->thread.fp_regs.fprs[i] =
                *(freg_t *)(current->thread.vxrs + i);
    } else
        save_fp_regs(current->thread.fp_regs.fprs);
}