Support boot stack size configuration option

Author: ChazJin

targets/TARGET_GigaDevice/TARGET_GD32E10X/device/TOOLCHAIN_ARM_STD/gd32e103vb.sct

@@ -11,6 +11,12 @@
   #define MBED_APP_SIZE 0x20000
 #endif
 
+#if !defined(MBED_BOOT_STACK_SIZE)
+  #define MBED_BOOT_STACK_SIZE 0x400
+#endif
+
+#define Stack_Size MBED_BOOT_STACK_SIZE
+
 LR_IROM1 MBED_APP_START MBED_APP_SIZE  {    ; load region size_region (1024K)
 
   ER_IROM1 MBED_APP_START MBED_APP_SIZE  {  ; load address = execution address
@@ -20,8 +26,11 @@ LR_IROM1 MBED_APP_START MBED_APP_SIZE  {    ; load region size_region (1024K)
   }
 
   ; 84 vectors (16 core + 68 peripheral) * 4 bytes = 336 bytes to reserve (0x150)
-  RW_IRAM1 (0x20000000+0x150) (0x8000-0x150)  {  ; RW data
+  RW_IRAM1 (0x20000000+0x150) (0x8000-0x150-Stack_Size)  {  ; RW data
    .ANY (+RW +ZI)
   }
+
+  ARM_LIB_STACK 0x20000000+0x8000 EMPTY -Stack_Size { ; Stack region growing down
+  }
 }
 

targets/TARGET_GigaDevice/TARGET_GD32E10X/device/TOOLCHAIN_GCC_ARM/GD32E103xB.ld

@@ -6,6 +6,10 @@
   #define MBED_APP_SIZE 128K
 #endif
 
+#if !defined(MBED_BOOT_STACK_SIZE)
+  #define MBED_BOOT_STACK_SIZE 0x400
+#endif
+
 /* specify memory regions */
 MEMORY
 { 
@@ -112,6 +116,7 @@ SECTIONS
         __end__ = .;
         end = __end__;
         *(.heap*)
+        . = ORIGIN(RAM) + LENGTH(RAM) - MBED_BOOT_STACK_SIZE;
         __HeapLimit = .;
     } > RAM
 
@@ -123,7 +128,7 @@ SECTIONS
     /* initializes stack on the end of block */
     __StackTop = ORIGIN(RAM) + LENGTH(RAM);
     _estack = __StackTop;
-    __StackLimit = __StackTop - SIZEOF(.stack_dummy);
+    __StackLimit = __StackTop - MBED_BOOT_STACK_SIZE;
     PROVIDE(__stack = __StackTop);
 
     ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack")

targets/TARGET_GigaDevice/TARGET_GD32E10X/device/TOOLCHAIN_IAR/gd32e103vb.icf

@@ -4,6 +4,7 @@
 
 if (!isdefinedsymbol(MBED_APP_START)) { define symbol MBED_APP_START = 0x08000000; }
 if (!isdefinedsymbol(MBED_APP_SIZE)) { define symbol MBED_APP_SIZE = 0x20000; }
+if (!isdefinedsymbol(MBED_BOOT_STACK_SIZE)) { define symbol MBED_BOOT_STACK_SIZE = 0x400; }
 /*-Specials-*/
 define symbol __ICFEDIT_intvec_start__ = MBED_APP_START;
 /*-Memory Regions-*/
@@ -15,7 +16,7 @@ define symbol __ICFEDIT_region_RAM_start__  = 0x20000150;
 define symbol __ICFEDIT_region_RAM_end__    = 0x20007FFF;
 /*-Sizes-*/
 /*Heap 1/4 of ram and stack 1/8*/
-define symbol __ICFEDIT_size_cstack__ = 0x1000;
+define symbol __ICFEDIT_size_cstack__ = MBED_BOOT_STACK_SIZE;
 define symbol __ICFEDIT_size_heap__   = 0x2000;
 /**** End of ICF editor section. ###ICF###*/