Daniel Kiper
2012-Nov-13 16:13 UTC
[PATCH 3/5] xen: Use per_cpu__crash_notes or crash_notes array
Newer Xen versions (at least 4.2) use crash_notes array
instead of per_cpu__crash_notes. Take into account that.
Signed-off-by: Daniel Kiper
<daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
diff -Npru crash-6.1.0.orig/xen_hyper.c crash-6.1.0/xen_hyper.c
--- crash-6.1.0.orig/xen_hyper.c 2012-09-27 21:19:15.000000000 +0200
+++ crash-6.1.0/xen_hyper.c 2012-11-12 15:56:17.000000000 +0100
@@ -645,15 +645,22 @@ xen_hyper_dumpinfo_init(void)
error(FATAL, "cannot malloc dumpinfo table context_xen_core_array
space.\n");
}
BZERO(xhdit->context_xen_core_array, size);
- addr = symbol_value("per_cpu__crash_notes");
+ if (symbol_exists("per_cpu__crash_notes"))
+ addr = symbol_value("per_cpu__crash_notes");
+ else
+ get_symbol_data("crash_notes", sizeof(ulong), &addr);
for (i = 0; i < machdep->get_smp_cpus(); i++) {
ulong addr_notes;
- addr_notes = xen_hyper_per_cpu(addr, i);
+ if (symbol_exists("per_cpu__crash_notes"))
+ addr_notes = xen_hyper_per_cpu(addr, i);
+ else
+ addr_notes = addr + i * STRUCT_SIZE("crash_note_range_t") +
+ MEMBER_OFFSET("crash_note_range_t", "start");
if (xhdit->note_ver == XEN_HYPER_ELF_NOTE_V4) {
if (!readmem(addr_notes, KVADDR, &(xhdit->context_array[i].note),
- sizeof(ulong), "per_cpu__crash_notes", RETURN_ON_ERROR)) {
- error(WARNING, "cannot read per_cpu__crash_notes.\n");
+ sizeof(ulong), "crash_notes", RETURN_ON_ERROR)) {
+ error(WARNING, "cannot read crash_notes.\n");
return;
}
} else {
@@ -678,7 +685,7 @@ xen_hyper_dumpinfo_init(void)
xhdit->xen_info_cpu = samp_cpuid;
if (!xen_hyper_fill_elf_notes(xhdit->context_array[samp_cpuid].note,
buf, XEN_HYPER_ELF_NOTE_FILL_T_NOTE)) {
- error(FATAL, "cannot read per_cpu__crash_notes.\n");
+ error(FATAL, "cannot read crash_notes.\n");
}
bp = buf;