NRF52: add a separate .nvictable section and allow .noinit to be used by the application

Author: Bernhard Schuster

targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/TARGET_MCU_NRF52832/device/TOOLCHAIN_GCC_ARM/NRF52832.ld

@@ -199,13 +199,20 @@ SECTIONS
 
     __edata = .;
 
+    .nvictable (NOLOAD) :
+    {
+      PROVIDE(__start_nvictable = .);
+      KEEP(*(.nvictable))
+      PROVIDE(__stop_nvictable = .);
+    } > RAM_NVIC
+
     .noinit (NOLOAD) :
     {
       PROVIDE(__start_noinit = .);
       KEEP(*(.noinit))
       PROVIDE(__stop_noinit = .);
-    } > RAM_NVIC
-    
+    } > RAM
+
     .bss :
     {
         . = ALIGN(4);

targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/TARGET_MCU_NRF52840/device/TOOLCHAIN_GCC_ARM/NRF52840.ld

@@ -198,12 +198,19 @@ SECTIONS
 
     __edata = .;
 
+    .nvictable (NOLOAD) :
+    {
+      PROVIDE(__start_nvictable = .);
+      KEEP(*(.nvictable))
+      PROVIDE(__stop_nvictable = .);
+    } > RAM_NVIC
+
     .noinit (NOLOAD) :
     {
       PROVIDE(__start_noinit = .);
       KEEP(*(.noinit))
       PROVIDE(__stop_noinit = .);
-    } > RAM_NVIC
+    } > RAM
 
     .bss :
     {

targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/reloc_vector_table.c

@@ -46,13 +46,13 @@
 #endif
 
 #if defined(__CC_ARM) || (defined(__ARMCC_VERSION) && (__ARMCC_VERSION >= 6010050))
-    __attribute__ ((section(".bss.noinit"),zero_init))
+    __attribute__ ((section(".bss.nvictable"),zero_init))
     uint32_t nrf_dispatch_vector[NVIC_NUM_VECTORS];
 #elif defined(__GNUC__)
-    __attribute__ ((section(".noinit")))
+    __attribute__ ((section(".nvictable")))
     uint32_t nrf_dispatch_vector[NVIC_NUM_VECTORS];
 #elif defined(__ICCARM__)
-    uint32_t nrf_dispatch_vector[NVIC_NUM_VECTORS] @ ".noinit";
+    uint32_t nrf_dispatch_vector[NVIC_NUM_VECTORS] @ ".nvictable";
 #endif
 
 extern uint32_t __Vectors[];