arm32: kaslr: Print the real kaslr offset when kernel panic

hulk inclusion
category: bugfix
bugzilla: 47952
CVE: NA

------------------------------------------------------------------------

The bss section is cleared when the kernel is started, and __kaslr_offset
variable is located in the bss section, __kaslr_offset is reset to zero,
so we move __kaslr_offset from bss section to data section.
Signed-off-by: NCui GaoSheng <cuigaosheng1@huawei.com>
Reviewed-by: NXiu Jianfeng <xiujianfeng@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

arch/arm/kernel/head.S

@@ -103,11 +103,11 @@ ENTRY(stext)
 #ifdef CONFIG_RANDOMIZE_BASE
 	str_l	r3, __kaslr_offset, r9	@ offset in r3 if entered via kaslr ep
 
-	.section ".bss", "aw", %nobits
+	.pushsection .data		@ data in bss will be cleared
 	.align	2
 ENTRY(__kaslr_offset)
 	.long	0			@ will be wiped before entering C code
-	.previous
+	.popsection
 #endif
 
 #ifdef CONFIG_ARM_VIRT_EXT