[Crash-utility] Implement end_pfn -> max_pfn change for Xen dumps
This patch reflects the change from end_pfn to max_pfn in x86_64
mainline between 2.6.26 and 2.6.27 that already has been partitially
implemented in x86_64_init(PRE_GDB):
...
if (kernel_symbol_exists("end_pfn"))
/* 2.6.11 layout */
machdep->machspec->page_offset = PAGE_OFFSET_2_6_11;
else
/* 2.6.27 layout */
machdep->machspec->page_offset = PAGE_OFFSET_2_6_27;
...
also for Xen Dom0 dumps (not in HV mode).
Signed-off-by: Bernhard Walle <bwalle(a)suse.de>
---
kernel.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
--- a/kernel.c
+++ b/kernel.c
@@ -102,8 +102,14 @@ kernel_init()
}
if (machine_type("X86"))
get_symbol_data("max_pfn", sizeof(ulong),
&kt->p2m_table_size);
- if (machine_type("X86_64"))
- get_symbol_data("end_pfn", sizeof(ulong),
&kt->p2m_table_size);
+ if (machine_type("X86_64")) {
+ /*
+ * kernel version < 2.6.27 => end_pfn
+ * kernel version >= 2.6.27 => max_pfn
+ */
+ if (!try_get_symbol_data("end_pfn", sizeof(ulong),
&kt->p2m_table_size))
+ get_symbol_data("max_pfn", sizeof(ulong), &kt->p2m_table_size);
+ }
if ((kt->m2p_page = (char *)malloc(PAGESIZE())) == NULL)
error(FATAL, "cannot malloc m2p page.");
}