[PATCH v2 3/5] arm: decompressor: define a new zImage tag

@@ -39,6 +39,11 @@ SECTIONS
     LONG(ARM_ZIMAGE_MAGIC3)
     LONG(ZIMAGE_MAGIC(__piggy_size_addr - _start))
     LONG(ZIMAGE_MAGIC(_kernel_bss_size))
+    LONG(ZIMAGE_MAGIC(3))
+    LONG(ARM_ZIMAGE_MAGIC4)
+    LONG(ZIMAGE_MAGIC((_end - __bss_start) +
+                      (_stack_end - _stack_start) +
+                      MALLOC_SIZE))
     LONG(0)
     _table_end = .;
   }

@@ -108,10 +113,12 @@ SECTIONS
   . = BSS_START;
   __bss_start = .;
   .bss			: { *(.bss) }
+  . = ALIGN(8);		/* the stack must be 64-bit aligned and adjoin bss */
   _end = .;
 
-  . = ALIGN(8);		/* the stack must be 64-bit aligned */
+  _stack_start = .;
   .stack		: { *(.stack) }
+  _stack_end = .;
 
   PROVIDE(__pecoff_data_size = ALIGN(512) - ADDR(.data));
   PROVIDE(__pecoff_end = ALIGN(512));

@@ -15,6 +15,7 @@
 #define ARM_ZIMAGE_MAGIC1 ZIMAGE_MAGIC(0x016f2818)
 #define ARM_ZIMAGE_MAGIC2 (0x45454545)
 #define ARM_ZIMAGE_MAGIC3 ZIMAGE_MAGIC(0x5a534c4b)
+#define ARM_ZIMAGE_MAGIC4 ZIMAGE_MAGIC(0x5a534344)
 
 #ifndef __ASSEMBLY__
 

@@ -40,6 +41,8 @@ struct arm_zimage_tag {
 			__le32 size_ptr;
 			__le32 bss_size;
 		} krnl_size;
+#define ZIMAGE_TAG_ZIMAGE_MEM ARM_ZIMAGE_MAGIC4
+		__le32 zimage_mem;
 	} u;
 };