In Xen4, init_tss is a per-cpu symbol. Without this patch, crash fails on Xen4 hypervisor dumps during initialization with 'crash: cannot resolve "init_tss"'. Signed-off-by: Petr Tesarik <ptesarik(a)suse.cz&gt; --- xen_hyper.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) --- a/xen_hyper.c +++ b/xen_hyper.c @@ -319,6 +319,7 @@ struct xen_hyper_pcpu_context *pcc; char *buf, *bp; int i, cpuid; + int flag; XEN_HYPER_MEMBER_OFFSET_INIT(cpu_info_guest_cpu_user_regs, "cpu_info", "guest_cpu_user_regs"); XEN_HYPER_MEMBER_OFFSET_INIT(cpu_info_processor_id, "cpu_info", "processor_id"); @@ -330,11 +331,21 @@ /* get physical cpu context */ xen_hyper_alloc_pcpu_context_space(XEN_HYPER_MAX_CPUS()); - init_tss_base = symbol_value("init_tss"); + if (symbol_exists("per_cpu__init_tss")) { + init_tss_base = symbol_value("per_cpu__init_tss"); + flag = TRUE; + } else { + init_tss_base = symbol_value("init_tss"); + flag = FALSE; + } buf = GETBUF(XEN_HYPER_SIZE(tss_struct)); for_cpu_indexes(i, cpuid) { - init_tss = init_tss_base + XEN_HYPER_SIZE(tss_struct) * cpuid; + if (flag) + init_tss = xen_hyper_per_cpu(init_tss_base, cpuid); + else + init_tss = init_tss_base + + XEN_HYPER_SIZE(tss_struct) * cpuid; if (!readmem(init_tss, KVADDR, buf, XEN_HYPER_SIZE(tss_struct), "init_tss", RETURN_ON_ERROR)) { error(FATAL, "cannot read init_tss.\n");