linker_script: move .rela.dyn section to bl_common.ld.h

The .rela.dyn section is the same for BL2-AT-EL3, BL31, TSP.

Move it to the common header file.

I slightly changed the definition so that we can do "RELA_SECTION >RAM".
It still produced equivalent elf images.

Please note I got rid of '.' from the VMA field. Otherwise, if the end
of previous .data section is not 8-byte aligned, it fails to link.

aarch64-linux-gnu-ld.bfd: warning: changing start of section .rela.dyn by 4 bytes
aarch64-linux-gnu-ld.bfd: warning: changing start of section .rela.dyn by 4 bytes
aarch64-linux-gnu-ld.bfd: warning: changing start of section .rela.dyn by 4 bytes
make: *** [Makefile:1071: build/qemu/release/bl31/bl31.elf] Error 1

Change-Id: Iba7422d99c0374d4d9e97e6fd47bae129dba5cc9
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

bl2/bl2_el3.ld.S

@@ -105,17 +105,7 @@ SECTIONS
     __DATA_RAM_START__ = __DATA_START__;
     __DATA_RAM_END__ = __DATA_END__;
 
-    /*
-     * .rela.dyn needs to come after .data for the read-elf utility to parse
-     * this section correctly. Ensure 8-byte alignment so that the fields of
-     * RELA data structure are aligned.
-     */
-    . = ALIGN(8);
-    __RELA_START__ = .;
-    .rela.dyn . : {
-    } >RAM
-    __RELA_END__ = .;
-
+    RELA_SECTION >RAM
     STACK_SECTION >RAM
     BSS_SECTION >RAM
     XLAT_TABLE_SECTION >RAM

bl31/bl31.ld.S

@@ -115,17 +115,7 @@ SECTIONS
     __RW_START__ = . ;
 
     DATA_SECTION >RAM
-
-    /*
-     * .rela.dyn needs to come after .data for the read-elf utility to parse
-     * this section correctly. Ensure 8-byte alignment so that the fields of
-     * RELA data structure are aligned.
-     */
-    . = ALIGN(8);
-    __RELA_START__ = .;
-    .rela.dyn . : {
-    } >RAM
-    __RELA_END__ = .;
+    RELA_SECTION >RAM
 
 #ifdef BL31_PROGBITS_LIMIT
     ASSERT(. <= BL31_PROGBITS_LIMIT, "BL31 progbits has exceeded its limit.")

bl32/tsp/tsp.ld.S

@@ -71,17 +71,7 @@ SECTIONS
     __RW_START__ = . ;
 
     DATA_SECTION >RAM
-
-    /*
-     * .rela.dyn needs to come after .data for the read-elf utility to parse
-     * this section correctly. Ensure 8-byte alignment so that the fields of
-     * RELA data structure are aligned.
-     */
-    . = ALIGN(8);
-    __RELA_START__ = .;
-    .rela.dyn . : {
-    } >RAM
-    __RELA_END__ = .;
+    RELA_SECTION >RAM
 
 #ifdef TSP_PROGBITS_LIMIT
     ASSERT(. <= TSP_PROGBITS_LIMIT, "TSP progbits has exceeded its limit.")

include/common/bl_common.ld.h

@@ -101,6 +101,17 @@
 		__DATA_END__ = .;			\
 	}
 
+/*
+ * .rela.dyn needs to come after .data for the read-elf utility to parse
+ * this section correctly.
+ */
+#define RELA_SECTION					\
+	.rela.dyn : ALIGN(STRUCT_ALIGN) {		\
+		__RELA_START__ = .;			\
+		*(.rela*)				\
+		__RELA_END__ = .;			\
+	}
+
 #if !(defined(IMAGE_BL31) && RECLAIM_INIT_CODE)
 #define STACK_SECTION					\
 	stacks (NOLOAD) : {				\