[GigaDevice] Support boot stack size configuration option

Author: mprse

targets/TARGET_GigaDevice/TARGET_GD32F30X/TARGET_GD32F307VG/device/TOOLCHAIN_ARM_STD/gd32f307vg.sct

@@ -11,6 +11,12 @@
   #define MBED_APP_SIZE 0x100000
 #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) (0x18000-0x150)  {  ; RW data
+  RW_IRAM1 (0x20000000+0x150) (0x18000-0x150-Stack_Size)  {  ; RW data
    .ANY (+RW +ZI)
   }
+
+  ARM_LIB_STACK (0x20000000+0x18000) EMPTY -Stack_Size { ; stack
+  }
 }
 

targets/TARGET_GigaDevice/TARGET_GD32F30X/TARGET_GD32F307VG/device/TOOLCHAIN_GCC_ARM/GD32F307xG.ld

@@ -1,3 +1,9 @@
+#if !defined(MBED_BOOT_STACK_SIZE)
+    #define MBED_BOOT_STACK_SIZE 0x400
+#endif
+
+STACK_SIZE = MBED_BOOT_STACK_SIZE;
+
 /* specify memory regions */
 MEMORY
 { 
@@ -115,7 +121,7 @@ SECTIONS
     /* initializes stack on the end of block */
     __StackTop = ORIGIN(RAM) + LENGTH(RAM);
     _estack = __StackTop;
-    __StackLimit = __StackTop - SIZEOF(.stack_dummy);
+    __StackLimit = __StackTop - STACK_SIZE;
     PROVIDE(__stack = __StackTop);
 
     ASSERT(__StackLimit >= __HeapLimit, "region RAM overflowed with stack")

targets/TARGET_GigaDevice/TARGET_GD32F30X/TARGET_GD32F307VG/device/TOOLCHAIN_IAR/gd32f307vg.icf

@@ -6,16 +6,19 @@ if (!isdefinedsymbol(MBED_APP_START)) { define symbol MBED_APP_START = 0x0800000
 if (!isdefinedsymbol(MBED_APP_SIZE)) { define symbol MBED_APP_SIZE = 0x100000; }
 /*-Specials-*/
 define symbol __ICFEDIT_intvec_start__ = MBED_APP_START;
+if (!isdefinedsymbol(MBED_BOOT_STACK_SIZE)) {
+    define symbol MBED_BOOT_STACK_SIZE = 0x400;
+}
 /*-Memory Regions-*/
 define symbol __ICFEDIT_region_ROM_start__  = MBED_APP_START;
 define symbol __ICFEDIT_region_ROM_end__    = MBED_APP_START + MBED_APP_SIZE - 1;
 define symbol __ICFEDIT_region_NVIC_start__ = 0x20000000;
 define symbol __ICFEDIT_region_NVIC_end__   = 0x2000014F;
 define symbol __ICFEDIT_region_RAM_start__  = 0x20000150;
 define symbol __ICFEDIT_region_RAM_end__    = 0x20017FFF;
+
 /*-Sizes-*/
-/*Heap 1/4 of ram and stack 1/8*/
-define symbol __ICFEDIT_size_cstack__ = 0x3000;
+define symbol __ICFEDIT_size_cstack__ = MBED_BOOT_STACK_SIZE;
 define symbol __ICFEDIT_size_heap__   = 0x6000;
 /**** End of ICF editor section. ###ICF###*/