diff --git a/executer/user/arch/arm64/include/arch-eclair.h b/executer/user/arch/arm64/include/arch-eclair.h
index 891aec54..5a8474fe 100644
--- a/executer/user/arch/arm64/include/arch-eclair.h
+++ b/executer/user/arch/arm64/include/arch-eclair.h
@@ -2,9 +2,6 @@
 #ifndef HEADER_USER_ARM64_ECLAIR_H
 #define HEADER_USER_ARM64_ECLAIR_H
 
-/* PHYS_OFFSET needs to be changed according to the environment. */
-#define PHYS_OFFSET		0x40000000
-
 #ifdef CONFIG_ARM64_64K_PAGES
 #
 # if (CONFIG_ARM64_VA_BITS == 42)
diff --git a/executer/user/eclair.c b/executer/user/eclair.c
index f7c752c8..831ccf44 100644
--- a/executer/user/eclair.c
+++ b/executer/user/eclair.c
@@ -60,6 +60,8 @@ struct thread_info {
 	uintptr_t arch_clv;
 }; /* struct thread_info */
 
+/* Physical memory start addr (non-zero on ARM64) */
+unsigned long PHYS_OFFSET;
 /* Virtual address where McKernel is mapped to */
 unsigned long MAP_KERNEL_START;
 
@@ -605,6 +607,7 @@ static int setup_dump(char *fname) {
 	}
 
 	kernel_base = mem_chunks->kernel_base;
+	PHYS_OFFSET = mem_chunks->phys_start;
 
 	for (i = 0; i < mem_info.nr_chunks; ++i) {
 		memset(physmem_name,0,sizeof(physmem_name));
diff --git a/executer/user/eclair.h b/executer/user/eclair.h
index 8f9f24b7..3072a3c2 100644
--- a/executer/user/eclair.h
+++ b/executer/user/eclair.h
@@ -8,6 +8,7 @@
 #include <inttypes.h>
 #include <arch-eclair.h>
 
+extern unsigned long PHYS_OFFSET;
 extern unsigned long MAP_KERNEL_START;
 
 /* common */
diff --git a/executer/user/ldump2mcdump.c b/executer/user/ldump2mcdump.c
index ace7895f..703079db 100644
--- a/executer/user/ldump2mcdump.c
+++ b/executer/user/ldump2mcdump.c
@@ -50,6 +50,8 @@ struct dump_mem_chunk {
 typedef struct dump_mem_chunks_s {
 	int nr_chunks;
 	unsigned long kernel_base;
+	/* memstart_addr in aarch64 */
+	unsigned long phys_start;
 	struct dump_mem_chunk chunks[];
 } dump_mem_chunks_t;
 
diff --git a/ihk b/ihk
index fdd513f4..b053576c 160000
--- a/ihk
+++ b/ihk
@@ -1 +1 @@
-Subproject commit fdd513f41ce783544576c9e349badc8fd6582ab4
+Subproject commit b053576c89b428e0e6a8f75412d85909a7259b27