[NORDIC] Support boot stack size configuration option

targets/TARGET_NORDIC/TARGET_MCU_NRF51822/device/TOOLCHAIN_ARM_STD/TARGET_MCU_NORDIC_32K/nRF51822.sct

@@ -1,3 +1,5 @@
+#! armcc -E
+
 ;WITHOUT SOFTDEVICE:
 ;LR_IROM1 0x00000000 0x00040000  {
 ;  ER_IROM1 0x00000000 0x00040000  {
@@ -12,6 +14,8 @@
 ;
 ;WITH SOFTDEVICE:
 
+#define Stack_Size MBED_BOOT_STACK_SIZE
+
 LR_IROM1 0x1C000 0x0024000  {
   ER_IROM1 0x1C000 0x0024000  {
    *.o (RESET, +First)
@@ -21,4 +25,6 @@ LR_IROM1 0x1C000 0x0024000  {
   RW_IRAM1 0x20002800 0x00005800  {
    .ANY (+RW +ZI)
   }
+  ARM_LIB_STACK 0x20002800+0x00005800 EMPTY -Stack_Size { ; Stack region growing down
+  }
 }

targets/TARGET_NORDIC/TARGET_MCU_NRF51822/device/TOOLCHAIN_ARM_STD/TARGET_MCU_NRF51_16K_S110/nRF51822.sct

@@ -1,3 +1,5 @@
+#! armcc -E
+
 ;WITHOUT SOFTDEVICE:
 ;LR_IROM1 0x00000000 0x00040000  {
 ;  ER_IROM1 0x00000000 0x00040000  {
@@ -12,6 +14,8 @@
 ;
 ;WITH SOFTDEVICE:
 
+#define Stack_Size MBED_BOOT_STACK_SIZE
+
 LR_IROM1 0x18000 0x0028000  {
   ER_IROM1 0x18000 0x0028000  {
    *.o (RESET, +First)
@@ -21,4 +25,6 @@ LR_IROM1 0x18000 0x0028000  {
   RW_IRAM1 0x20002000 0x00002000  {
    .ANY (+RW +ZI)
   }
+  ARM_LIB_STACK 0x20002000+0x00002000 EMPTY -Stack_Size { ; Stack region growing down
+  }
 }

targets/TARGET_NORDIC/TARGET_MCU_NRF51822/device/TOOLCHAIN_ARM_STD/TARGET_MCU_NRF51_16K_S130/nRF51822.sct

@@ -1,3 +1,5 @@
+#! armcc -E
+
 ;WITHOUT SOFTDEVICE:
 ;LR_IROM1 0x00000000 0x00040000  {
 ;  ER_IROM1 0x00000000 0x00040000  {
@@ -12,6 +14,8 @@
 ;
 ;WITH SOFTDEVICE:
 
+#define Stack_Size MBED_BOOT_STACK_SIZE
+
 LR_IROM1 0x1C000 0x0024000  {
   ER_IROM1 0x1C000 0x0024000  {
    *.o (RESET, +First)
@@ -21,4 +25,6 @@ LR_IROM1 0x1C000 0x0024000  {
   RW_IRAM1 0x20002800 0x00001800  {
    .ANY (+RW +ZI)
   }
+  ARM_LIB_STACK 0x20002800+0x00001800 EMPTY -Stack_Size { ; Stack region growing down
+  }
 }

targets/TARGET_NORDIC/TARGET_MCU_NRF51822/device/TOOLCHAIN_GCC_ARM/TARGET_MCU_NORDIC_32K/NRF51822.ld

@@ -1,5 +1,9 @@
 /* Linker script to configure memory regions. */
 
+#if !defined(MBED_BOOT_STACK_SIZE)
+    #define MBED_BOOT_STACK_SIZE 0x800
+#endif
+
 MEMORY
 {
   FLASH (rx) : ORIGIN = 0x0001C000, LENGTH = 0x24000
@@ -130,7 +134,7 @@ SECTIONS
 		end = __end__;
 		__HeapBase = .;
 		*(.heap*)
-		. = ORIGIN(RAM) + LENGTH(RAM) - Stack_Size;
+		. = ORIGIN(RAM) + LENGTH(RAM) - MBED_BOOT_STACK_SIZE;
 		__HeapLimit = .;
 	} > RAM
 
@@ -145,7 +149,7 @@ SECTIONS
 	/* Set stack top to end of RAM, and stack limit move down by
 	 * size of stack_dummy section */
 	__StackTop = ORIGIN(RAM) + LENGTH(RAM);
-	__StackLimit = __StackTop - SIZEOF(.stack_dummy);
+	__StackLimit = __StackTop - MBED_BOOT_STACK_SIZE;
 	PROVIDE(__stack = __StackTop);
 
 	/* Check if data + heap + stack exceeds RAM limit */

targets/TARGET_NORDIC/TARGET_MCU_NRF51822/device/TOOLCHAIN_GCC_ARM/TARGET_MCU_NRF51_16K_S110/NRF51822.ld

@@ -1,5 +1,9 @@
 /* Linker script to configure memory regions. */
 
+#if !defined(MBED_BOOT_STACK_SIZE)
+    #define MBED_BOOT_STACK_SIZE 0x800
+#endif
+
 MEMORY
 {
   FLASH (rx) : ORIGIN = 0x00018000, LENGTH = 0x28000
@@ -130,7 +134,7 @@ SECTIONS
 		end = __end__;
 		__HeapBase = .;
 		*(.heap*)
-		. = ORIGIN(RAM) + LENGTH(RAM) - Stack_Size;
+		. = ORIGIN(RAM) + LENGTH(RAM) - MBED_BOOT_STACK_SIZE;
 		__HeapLimit = .;
 	} > RAM
 
@@ -145,7 +149,7 @@ SECTIONS
 	/* Set stack top to end of RAM, and stack limit move down by
 	 * size of stack_dummy section */
 	__StackTop = ORIGIN(RAM) + LENGTH(RAM);
-	__StackLimit = __StackTop - SIZEOF(.stack_dummy);
+	__StackLimit = __StackTop - MBED_BOOT_STACK_SIZE;
 	PROVIDE(__stack = __StackTop);
 
 	/* Check if data + heap + stack exceeds RAM limit */

targets/TARGET_NORDIC/TARGET_MCU_NRF51822/device/TOOLCHAIN_GCC_ARM/TARGET_MCU_NRF51_16K_S130/NRF51822.ld

@@ -1,5 +1,9 @@
 /* Linker script to configure memory regions. */
 
+#if !defined(MBED_BOOT_STACK_SIZE)
+    #define MBED_BOOT_STACK_SIZE 0x800
+#endif
+
 MEMORY
 {
   FLASH (rx) : ORIGIN = 0x0001C000, LENGTH = 0x24000
@@ -130,7 +134,7 @@ SECTIONS
 		end = __end__;
 		__HeapBase = .;
 		*(.heap*)
-		. = ORIGIN(RAM) + LENGTH(RAM) - Stack_Size;
+		. = ORIGIN(RAM) + LENGTH(RAM) - MBED_BOOT_STACK_SIZE;
 		__HeapLimit = .;
 	} > RAM
 
@@ -145,7 +149,7 @@ SECTIONS
 	/* Set stack top to end of RAM, and stack limit move down by
 	 * size of stack_dummy section */
 	__StackTop = ORIGIN(RAM) + LENGTH(RAM);
-	__StackLimit = __StackTop - SIZEOF(.stack_dummy);
+	__StackLimit = __StackTop - MBED_BOOT_STACK_SIZE;
 	PROVIDE(__stack = __StackTop);
 
 	/* Check if data + heap + stack exceeds RAM limit */

targets/TARGET_NORDIC/TARGET_MCU_NRF51822/device/TOOLCHAIN_GCC_ARM/startup_NRF51822.S

@@ -38,16 +38,9 @@ expected to be copied into the application project folder prior to its use!
 
     .section .stack
     .align 3
-#ifdef __STACK_SIZE
-    .equ    Stack_Size, __STACK_SIZE
-#else
-    .equ    Stack_Size, 2048
-#endif
-    .globl    Stack_Size
     .globl    __StackTop
     .globl    __StackLimit
 __StackLimit:
-    .space    Stack_Size
     .size __StackLimit, . - __StackLimit
 __StackTop:
     .size __StackTop, . - __StackTop

targets/TARGET_NORDIC/TARGET_MCU_NRF51822/device/TOOLCHAIN_IAR/TARGET_MCU_NORDIC_16K/nRF51822_QFAA.icf

@@ -3,13 +3,16 @@
 /* IcfEditorFile="$TOOLKIT_DIR$\config\ide\IcfEditor\cortex_v1_0.xml" */
 /*-Specials-*/
 define symbol __ICFEDIT_intvec_start__ = 0x00016000;
+if (!isdefinedsymbol(MBED_BOOT_STACK_SIZE)) {
+    define symbol MBED_BOOT_STACK_SIZE = 0x400;
+}
 /*-Memory Regions-*/
 define symbol __ICFEDIT_region_ROM_start__ = 0x000160c0;
 define symbol __ICFEDIT_region_ROM_end__   = 0x0003FFFF;
 define symbol __ICFEDIT_region_RAM_start__ = 0x20002000;
 define symbol __ICFEDIT_region_RAM_end__   = 0x20003FFF;
 /*-Sizes-*/
-define symbol __ICFEDIT_size_cstack__ = 0x400;
+define symbol __ICFEDIT_size_cstack__ = MBED_BOOT_STACK_SIZE;
 define symbol __ICFEDIT_size_heap__   = 0x900;
 /**** End of ICF editor section. ###ICF###*/
 

targets/TARGET_NORDIC/TARGET_MCU_NRF51822/device/TOOLCHAIN_IAR/TARGET_MCU_NORDIC_32K/nRF51822_QFAA.icf

@@ -3,14 +3,16 @@
 /* IcfEditorFile="$TOOLKIT_DIR$\config\ide\IcfEditor\cortex_v1_0.xml" */
 /*-Specials-*/
 define symbol __ICFEDIT_intvec_start__ = 0x00016000;
+if (!isdefinedsymbol(MBED_BOOT_STACK_SIZE)) {
+    define symbol MBED_BOOT_STACK_SIZE = 0x400;
+}
 /*-Memory Regions-*/
 define symbol __ICFEDIT_region_ROM_start__   = 0x000160c0;
 define symbol __ICFEDIT_region_ROM_end__     = 0x0003FFFF;
 define symbol __ICFEDIT_region_RAM_start__   = 0x20002000;
 define symbol __ICFEDIT_region_RAM_end__     = 0x20007FFF;
 /*-Sizes-*/
-/*Heap 1/4 of ram and stack 1/8*/
+define symbol __ICFEDIT_size_cstack__   = MBED_BOOT_STACK_SIZE;
-define symbol __ICFEDIT_size_cstack__   = 0xc00;
 define symbol __ICFEDIT_size_heap__     = 0x1800;
 /**** End of ICF editor section. ###ICF###*/
 

targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF51/TARGET_MCU_NRF51822_UNIFIED/device/TOOLCHAIN_ARM_STD/TARGET_MCU_NORDIC_32K/nRF51822.sct

@@ -1,3 +1,5 @@
+#! armcc -E
+
 ;WITHOUT SOFTDEVICE:
 ;LR_IROM1 0x00000000 0x00040000  {
 ;  ER_IROM1 0x00000000 0x00040000  {
@@ -12,6 +14,8 @@
 ;
 ;WITH SOFTDEVICE:
 
+#define Stack_Size MBED_BOOT_STACK_SIZE
+
 LR_IROM1 0x1B000 0x0025000  {
   ER_IROM1 0x1B000 0x0025000  {
    *.o (RESET, +First)
@@ -24,4 +28,6 @@ LR_IROM1 0x1B000 0x0025000  {
   RW_IRAM1 0x20002FB8 0x00005048  {
    .ANY (+RW +ZI)
   }
+  ARM_LIB_STACK 0x20002FB8+0x00005048 EMPTY -Stack_Size { ; Stack region growing down
+  }
 }

targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF51/TARGET_MCU_NRF51822_UNIFIED/device/TOOLCHAIN_ARM_STD/TARGET_MCU_NRF51_16K_S110/nRF51822.sct

@@ -1,3 +1,5 @@
+#! armcc -E
+
 ;WITHOUT SOFTDEVICE:
 ;LR_IROM1 0x00000000 0x00040000  {
 ;  ER_IROM1 0x00000000 0x00040000  {
@@ -12,6 +14,8 @@
 ;
 ;WITH SOFTDEVICE:
 
+#define Stack_Size MBED_BOOT_STACK_SIZE
+
 LR_IROM1 0x18000 0x0028000  {
   ER_IROM1 0x18000 0x0028000  {
    *.o (RESET, +First)
@@ -24,4 +28,6 @@ LR_IROM1 0x18000 0x0028000  {
   RW_IRAM1 0x200020C0 0x00001F40  {
    .ANY (+RW +ZI)
   }
+  ARM_LIB_STACK 0x200020C0+0x00001F40 EMPTY -Stack_Size { ; Stack region growing down
+  }
 }

targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF51/TARGET_MCU_NRF51822_UNIFIED/device/TOOLCHAIN_ARM_STD/TARGET_MCU_NRF51_16K_S130/nRF51822.sct

@@ -1,3 +1,5 @@
+#! armcc -E
+
 ;WITHOUT SOFTDEVICE:
 ;LR_IROM1 0x00000000 0x00040000  {
 ;  ER_IROM1 0x00000000 0x00040000  {
@@ -12,6 +14,8 @@
 ;
 ;WITH SOFTDEVICE:
 
+#define Stack_Size MBED_BOOT_STACK_SIZE
+
 LR_IROM1 0x0001B000 0x0025000  {
   ER_IROM1 0x0001B000 0x0025000  {
    *.o (RESET, +First)
@@ -24,4 +28,6 @@ LR_IROM1 0x0001B000 0x0025000  {
   RW_IRAM1 0x20002FB8 0x00001048  {
    .ANY (+RW +ZI)
   }
+  ARM_LIB_STACK 0x20002FB8+0x00001048 EMPTY -Stack_Size { ; Stack region growing down
+  }
 }

targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF51/TARGET_MCU_NRF51822_UNIFIED/device/TOOLCHAIN_GCC_ARM/TARGET_MCU_NORDIC_32K/NRF51822.ld

@@ -1,5 +1,9 @@
 /* Linker script to configure memory regions. */
 
+#if !defined(MBED_BOOT_STACK_SIZE)
+    #define MBED_BOOT_STACK_SIZE 0x800
+#endif
+
 MEMORY
 {
   FLASH (rx) : ORIGIN = 0x0001B000, LENGTH = 0x25000
@@ -144,7 +148,7 @@ SECTIONS
 		end = __end__;
 		__HeapBase = .;
 		*(.heap*)
-		. = ORIGIN(RAM) + LENGTH(RAM) - Stack_Size;
+		. = ORIGIN(RAM) + LENGTH(RAM) - MBED_BOOT_STACK_SIZE;
 		__HeapLimit = .;
 	} > RAM
 
@@ -159,7 +163,7 @@ SECTIONS
 	/* Set stack top to end of RAM, and stack limit move down by
 	 * size of stack_dummy section */
 	__StackTop = ORIGIN(RAM) + LENGTH(RAM);
-	__StackLimit = __StackTop - SIZEOF(.stack_dummy);
+	__StackLimit = __StackTop - MBED_BOOT_STACK_SIZE;
 	PROVIDE(__stack = __StackTop);
 
 	/* Check if data + heap + stack exceeds RAM limit */

targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF51/TARGET_MCU_NRF51822_UNIFIED/device/TOOLCHAIN_GCC_ARM/TARGET_MCU_NRF51_16K_S110/NRF51822.ld

@@ -1,5 +1,9 @@
 /* Linker script to configure memory regions. */
 
+#if !defined(MBED_BOOT_STACK_SIZE)
+    #define MBED_BOOT_STACK_SIZE 0x800
+#endif
+
 MEMORY
 {
   FLASH (rx) : ORIGIN = 0x00018000, LENGTH = 0x28000
@@ -130,7 +134,7 @@ SECTIONS
 		end = __end__;
 		__HeapBase = .;
 		*(.heap*)
-		. = ORIGIN(RAM) + LENGTH(RAM) - Stack_Size;
+		. = ORIGIN(RAM) + LENGTH(RAM) - MBED_BOOT_STACK_SIZE;
 		__HeapLimit = .;
 	} > RAM
 
@@ -145,7 +149,7 @@ SECTIONS
 	/* Set stack top to end of RAM, and stack limit move down by
 	 * size of stack_dummy section */
 	__StackTop = ORIGIN(RAM) + LENGTH(RAM);
-	__StackLimit = __StackTop - SIZEOF(.stack_dummy);
+	__StackLimit = __StackTop - MBED_BOOT_STACK_SIZE;
 	PROVIDE(__stack = __StackTop);
 
 	/* Check if data + heap + stack exceeds RAM limit */

targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF51/TARGET_MCU_NRF51822_UNIFIED/device/TOOLCHAIN_GCC_ARM/TARGET_MCU_NRF51_16K_S130/NRF51822.ld

@@ -1,5 +1,9 @@
 /* Linker script to configure memory regions. */
 
+#if !defined(MBED_BOOT_STACK_SIZE)
+    #define MBED_BOOT_STACK_SIZE 0x800
+#endif
+
 MEMORY
 {
   FLASH (rx) : ORIGIN = 0x0001B000, LENGTH = 0x25000
@@ -142,7 +146,7 @@ SECTIONS
 		end = __end__;
 		__HeapBase = .;
 		*(.heap*)
-		. = ORIGIN(RAM) + LENGTH(RAM) - Stack_Size;
+		. = ORIGIN(RAM) + LENGTH(RAM) - MBED_BOOT_STACK_SIZE;
 		__HeapLimit = .;
 	} > RAM
 
@@ -157,7 +161,7 @@ SECTIONS
 	/* Set stack top to end of RAM, and stack limit move down by
 	 * size of stack_dummy section */
 	__StackTop = ORIGIN(RAM) + LENGTH(RAM);
-	__StackLimit = __StackTop - SIZEOF(.stack_dummy);
+	__StackLimit = __StackTop - MBED_BOOT_STACK_SIZE;
 	PROVIDE(__stack = __StackTop);
 
 	/* Check if data + heap + stack exceeds RAM limit */

targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF51/TARGET_MCU_NRF51822_UNIFIED/device/TOOLCHAIN_GCC_ARM/startup_NRF51822.S

@@ -47,16 +47,9 @@ expected to be copied into the application project folder prior to its use!
 
     .section .stack
     .align 3
-#ifdef __STACK_SIZE
-    .equ    Stack_Size, __STACK_SIZE
-#else
-    .equ    Stack_Size, 2048
-#endif
-    .globl    Stack_Size
     .globl    __StackTop
     .globl    __StackLimit
 __StackLimit:
-    .space    Stack_Size
     .size __StackLimit, . - __StackLimit
 __StackTop:
     .size __StackTop, . - __StackTop

targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF51/TARGET_MCU_NRF51822_UNIFIED/device/TOOLCHAIN_IAR/TARGET_MCU_NORDIC_16K/nRF51822_QFAA.icf

@@ -3,6 +3,9 @@
 /* IcfEditorFile="$TOOLKIT_DIR$\config\ide\IcfEditor\cortex_v1_0.xml" */
 /*-Specials-*/
 define symbol __ICFEDIT_intvec_start__ = 0x0001b000;
+if (!isdefinedsymbol(MBED_BOOT_STACK_SIZE)) {
+    define symbol MBED_BOOT_STACK_SIZE = 0x400;
+}
 /*-Memory Regions-*/
 define symbol __ICFEDIT_region_ROM_start__ = 0x0001b0c0;
 define symbol __ICFEDIT_region_ROM_end__   = 0x0003FFFF;
@@ -11,7 +14,7 @@ define symbol __ICFEDIT_region_RAM_end__   = 0x20003FFF;
 export symbol __ICFEDIT_region_RAM_start__;
 export symbol __ICFEDIT_region_RAM_end__;
 /*-Sizes-*/
-define symbol __ICFEDIT_size_cstack__ = 0x800;
+define symbol __ICFEDIT_size_cstack__ = MBED_BOOT_STACK_SIZE;
 define symbol __ICFEDIT_size_heap__   = 0x900;
 /**** End of ICF editor section. ###ICF###*/
 

targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF51/TARGET_MCU_NRF51822_UNIFIED/device/TOOLCHAIN_IAR/TARGET_MCU_NORDIC_32K/nRF51822_QFAA.icf

@@ -2,6 +2,9 @@
 /*-Editor annotation file-*/
 /* IcfEditorFile="$TOOLKIT_DIR$\config\ide\IcfEditor\cortex_v1_0.xml" */
 /*-Specials-*/
+if (!isdefinedsymbol(MBED_BOOT_STACK_SIZE)) {
+    define symbol MBED_BOOT_STACK_SIZE = 0x400;
+}
 define symbol __ICFEDIT_intvec_start__ = 0x0001b000;
 /*-Memory Regions-*/
 define symbol __ICFEDIT_region_ROM_start__ = 0x0001b0c0;
@@ -11,8 +14,7 @@ define symbol __ICFEDIT_region_RAM_end__   = 0x20007FFF;
 export symbol __ICFEDIT_region_RAM_start__;
 export symbol __ICFEDIT_region_RAM_end__;
 /*-Sizes-*/
-/*Heap 1/4 of ram and stack 1/8*/
+define symbol __ICFEDIT_size_cstack__   = MBED_BOOT_STACK_SIZE;
-define symbol __ICFEDIT_size_cstack__   = 0x800;
 define symbol __ICFEDIT_size_heap__     = 0x1800;
 /**** End of ICF editor section. ###ICF###*/
 

targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/TARGET_MCU_NRF52832/device/TOOLCHAIN_ARM_STD/nRF52832.sct

@@ -9,6 +9,8 @@
   #define MBED_APP_SIZE 0x80000
 #endif
 
+#define Stack_Size MBED_BOOT_STACK_SIZE
+
 /* If softdevice is present, set aside space for it */
 #if !defined(MBED_RAM_START)
   #if defined(SOFTDEVICE_PRESENT)
@@ -38,4 +40,6 @@ LR_IROM1 MBED_APP_START MBED_APP_SIZE {
   RW_IRAM1 MBED_RAM1_START MBED_RAM1_SIZE {
    .ANY (+RW +ZI)
   }
+  ARM_LIB_STACK MBED_RAM1_START+MBED_RAM1_SIZE EMPTY -Stack_Size { ; Stack region growing down
+  }
 }

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

@@ -36,6 +36,10 @@
   #endif
 #endif
 
+#if !defined(MBED_BOOT_STACK_SIZE)
+    #define MBED_BOOT_STACK_SIZE 0x800
+#endif
+
 #define MBED_RAM0_START MBED_RAM_START
 #define MBED_RAM0_SIZE  0xE0
 #define MBED_RAM1_START (MBED_RAM_START + MBED_RAM0_SIZE)
@@ -232,8 +236,8 @@ SECTIONS
         *(.heap*);
 
         /* Expand the heap to reach the stack boundary. */
-        ASSERT(. <= (ORIGIN(RAM) + LENGTH(RAM) - 0x800), "heap region overflowed into stack");
+        ASSERT(. <= (ORIGIN(RAM) + LENGTH(RAM) - MBED_BOOT_STACK_SIZE), "heap region overflowed into stack");
-        . += (ORIGIN(RAM) + LENGTH(RAM) - 0x800) - .;
+        . = ORIGIN(RAM) + LENGTH(RAM) - MBED_BOOT_STACK_SIZE;
     } > RAM
     PROVIDE(__heap_start = ADDR(.heap));
     PROVIDE(__heap_size = SIZEOF(.heap));
@@ -247,12 +251,12 @@ SECTIONS
     {
         __StackLimit = .;
         *(.stack*)
-        . += (ORIGIN(RAM) + LENGTH(RAM) - .);
+        . = ORIGIN(RAM) + LENGTH(RAM);
     } > RAM
 
     /* Set the stack top to the end of RAM and move down the stack limit by
      * the size of the stack_dummy section. */
     __StackTop = ORIGIN(RAM) + LENGTH(RAM);
-    __StackLimit = __StackTop - SIZEOF(.stack);
+    __StackLimit = __StackTop - MBED_BOOT_STACK_SIZE;
     PROVIDE(__stack = __StackTop);
 }

targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/TARGET_MCU_NRF52832/device/TOOLCHAIN_IAR/nRF52832.icf

@@ -22,6 +22,10 @@ if (!isdefinedsymbol(MBED_RAM_START)) {
   }
 }
 
+if (!isdefinedsymbol(MBED_BOOT_STACK_SIZE)) {
+    define symbol MBED_BOOT_STACK_SIZE = 0x400;
+}
+
 define symbol MBED_RAM0_START = MBED_RAM_START;
 define symbol MBED_RAM0_SIZE  = 0xE0;  /* 8-byte aligned(0xDC) = 0xE0 */ 
 define symbol MBED_RAM1_START = (MBED_RAM_START + MBED_RAM0_SIZE);
@@ -41,8 +45,7 @@ export symbol __ICFEDIT_region_RAM_start__;
 export symbol __ICFEDIT_region_RAM_end__;
 
 /*-Sizes-*/
-/*Heap 1/4 of ram and stack 1/8*/
+define symbol __ICFEDIT_size_cstack__   = MBED_BOOT_STACK_SIZE;
-define symbol __ICFEDIT_size_cstack__   = 0x800;
 define symbol __ICFEDIT_size_heap__     = 0x5800;
 /**** End of ICF editor section. ###ICF###*/
 

targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/TARGET_MCU_NRF52840/device/TOOLCHAIN_ARM_STD/nRF52840.sct

@@ -20,6 +20,8 @@
   #endif
 #endif
 
+#define Stack_Size MBED_BOOT_STACK_SIZE
+
 #define MBED_RAM0_START MBED_RAM_START
 #define MBED_RAM0_SIZE  0x100
 
@@ -43,4 +45,6 @@ LR_IROM1 MBED_APP_START MBED_APP_SIZE {
   RW_IRAM1 MBED_RAM1_START MBED_RAM1_SIZE {
    .ANY (+RW +ZI)
   }
+  ARM_LIB_STACK MBED_RAM1_START+MBED_RAM1_SIZE EMPTY -Stack_Size { ; Stack region growing down
+  }
 }

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

@@ -25,6 +25,10 @@
   #define MBED_APP_SIZE 0x100000
 #endif
 
+#if !defined(MBED_BOOT_STACK_SIZE)
+    #define MBED_BOOT_STACK_SIZE 0x800
+#endif
+
 /* If softdevice is present, set aside space for it */
 #if !defined(MBED_RAM_START)
   #if defined(SOFTDEVICE_PRESENT)
@@ -248,8 +252,8 @@ SECTIONS
         *(.heap*);
 
         /* Expand the heap to reach the stack boundary. */
-        ASSERT(. <= (ORIGIN(RAM) + LENGTH(RAM) - 0x800), "heap region overflowed into stack");
+        ASSERT(. <= (ORIGIN(RAM) + LENGTH(RAM) - MBED_BOOT_STACK_SIZE), "heap region overflowed into stack");
-        . += (ORIGIN(RAM) + LENGTH(RAM) - 0x800) - .;
+        . = ORIGIN(RAM) + LENGTH(RAM) - MBED_BOOT_STACK_SIZE;
     } > RAM
     PROVIDE(__heap_start = ADDR(.heap));
     PROVIDE(__heap_size = SIZEOF(.heap));
@@ -263,12 +267,12 @@ SECTIONS
     {
         __StackLimit = .;
         *(.stack*)
-        . += (ORIGIN(RAM) + LENGTH(RAM) - .);
+        . = ORIGIN(RAM) + LENGTH(RAM);
     } > RAM
 
     /* Set the stack top to the end of RAM and move down the stack limit by
      * the size of the stack_dummy section. */
     __StackTop = ORIGIN(RAM) + LENGTH(RAM);
-    __StackLimit = __StackTop - SIZEOF(.stack);
+    __StackLimit = __StackTop - MBED_BOOT_STACK_SIZE;
     PROVIDE(__stack = __StackTop);
 }

targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/TARGET_MCU_NRF52840/device/TOOLCHAIN_IAR/nRF52840.icf

@@ -22,6 +22,10 @@ if (!isdefinedsymbol(MBED_RAM_START)) {
   }
 }
 
+if (!isdefinedsymbol(MBED_BOOT_STACK_SIZE)) {
+    define symbol MBED_BOOT_STACK_SIZE = 0x400;
+}
+
 define symbol MBED_RAM0_START = MBED_RAM_START;
 define symbol MBED_RAM0_SIZE  = 0x100;
 define symbol MBED_CRASH_REPORT_RAM_START = (MBED_RAM_START + MBED_RAM0_SIZE);
@@ -45,8 +49,7 @@ export symbol __ICFEDIT_region_RAM_start__;
 export symbol __ICFEDIT_region_RAM_end__;
 
 /*-Sizes-*/
-/*Heap 1/4 of ram and stack 1/8*/
+define symbol __ICFEDIT_size_cstack__   = MBED_BOOT_STACK_SIZE;
-define symbol __ICFEDIT_size_cstack__   = 0x800;
 define symbol __ICFEDIT_size_heap__     = 0x17800;
 /**** End of ICF editor section. ###ICF###*/