From: AKASHI Takahiro <takahiro.akashi@xxxxxxxxxx>
For the current crash utility, we need to know, at least, a value of
"kimage_voffset" to handle the contents of core dump file (/proc/vmcore)
correctly due to the introduction of KASLR (CONFIG_RANDOMIZE_BASE) in v4.6.
More VMCOREINFO may be added later for makedumpfile command.
---
arch/arm64/kernel/machine_kexec.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/arm64/kernel/machine_kexec.c b/arch/arm64/kernel/machine_kexec.c
index 92e8a92..ac3655f 100644
--- a/arch/arm64/kernel/machine_kexec.c
+++ b/arch/arm64/kernel/machine_kexec.c
@@ -22,6 +22,7 @@
#include <asm/cacheflush.h>
#include <asm/cpu_ops.h>
+#include <asm/memory.h>
#include <asm/mmu_context.h>
#include <asm/system_misc.h>
@@ -299,3 +300,10 @@ void machine_crash_shutdown(struct pt_regs *regs)
pr_info("Starting crashdump kernel...\n");
}
+
+void arch_crash_save_vmcoreinfo(void)
+{
+ /* Please note VMCOREINFO_NUMBER() uses "%d", not "%x" */
+ vmcoreinfo_append_str("NUMBER(kimage_voffset)=0x%llx\n",
+ kimage_voffset);
+}
--
2.5.0
