update ld file

ld/gd32e23x_gcc.ld

@@ -1,127 +1,155 @@
-/* memory map */
+/* Memory Map */
+
+/* Entry Point */
+ENTRY(Reset_Handler)
+
+/* Highest address of the user mode stack */
+_sp = ORIGIN(RAM) + LENGTH(RAM); /* end of "RAM" Ram type memory */
+
+_Min_Heap_Size = 0x200; /* required amount of heap */
+_Min_Stack_Size = 0x400; /* required amount of stack */
+
+/* Memories definition */
 MEMORY
 {
     FLASH (rx)  : ORIGIN = 0x08000000, LENGTH = 16K
     RAM (xrw)   : ORIGIN = 0x20000000, LENGTH = 4K
 }
 
-ENTRY(Reset_Handler)
+/* Sections */
-
 SECTIONS
 {
-  __stack_size = DEFINED(__stack_size) ? __stack_size : 2K;
+    /* The startup code into "FLASH" Rom type memory */
-
-/* ISR vectors */
     .vectors :
     {
         . = ALIGN(4);
-    KEEP(*(.vectors))
+        KEEP(*(.vectors)) /* Startup code */
         . = ALIGN(4);
-    __Vectors_End = .;
-    __Vectors_Size = __Vectors_End - __gVectors;
     } >FLASH
 
+    /* The program code and other data into "FLASH" Rom type memory */
     .text :
     {
         . = ALIGN(4);
-    *(.text)
+        *(.text)           /* .text sections (code) */
-    *(.text*)
+        *(.text*)          /* .text* sections (code) */
-    *(.glue_7)
+        *(.glue_7)         /* glue arm to thumb code */
-    *(.glue_7t)
+        *(.glue_7t)        /* glue thumb to arm code */
         *(.eh_frame)
 
         KEEP (*(.init))
         KEEP (*(.fini))
 
         . = ALIGN(4);
-    /* the symbol '_etext' will be defined at the end of code section */
+        _etext = .;        /* define a global symbols at end of code */
-    _etext = .;
     } >FLASH
 
+    /* Constant data into "FLASH" Rom type memory */
     .rodata :
     {
         . = ALIGN(4);
-    *(.rodata)
+        *(.rodata)         /* .rodata sections (constants, strings, etc.) */
-    *(.rodata*)
+        *(.rodata*)        /* .rodata* sections (constants, strings, etc.) */
         . = ALIGN(4);
     } >FLASH
 
-  .ARM.extab :
+    .ARM.extab (READONLY) : /* The READONLY keyword is only supported in GCC11 and later, remove it if using GCC10 or earlier. */
     {
+        . = ALIGN(4);
         *(.ARM.extab* .gnu.linkonce.armextab.*)
+        . = ALIGN(4);
     } >FLASH
 
-  .ARM : {
+    .ARM (READONLY) : /* The READONLY keyword is only supported in GCC11 and later, remove it if using GCC10 or earlier. */
+    {
+        . = ALIGN(4);
         __exidx_start = .;
         *(.ARM.exidx*)
         __exidx_end = .;
+        . = ALIGN(4);
     } >FLASH
 
-  .ARM.attributes : { *(.ARM.attributes) } > FLASH
+    .preinit_array (READONLY) : /* The READONLY keyword is only supported in GCC11 and later, remove it if using GCC10 or earlier. */
-
-  .preinit_array :
     {
+        . = ALIGN(4);
         PROVIDE_HIDDEN (__preinit_array_start = .);
         KEEP (*(.preinit_array*))
         PROVIDE_HIDDEN (__preinit_array_end = .);
+        . = ALIGN(4);
     } >FLASH
 
-  .init_array :
+    .init_array (READONLY) : /* The READONLY keyword is only supported in GCC11 and later, remove it if using GCC10 or earlier. */
     {
+        . = ALIGN(4);
         PROVIDE_HIDDEN (__init_array_start = .);
         KEEP (*(SORT(.init_array.*)))
         KEEP (*(.init_array*))
         PROVIDE_HIDDEN (__init_array_end = .);
+        . = ALIGN(4);
     } >FLASH
 
-  .fini_array :
+    .fini_array (READONLY) : /* The READONLY keyword is only supported in GCC11 and later, remove it if using GCC10 or earlier. */
     {
+        . = ALIGN(4);
         PROVIDE_HIDDEN (__fini_array_start = .);
-    KEEP (*(.fini_array*))
         KEEP (*(SORT(.fini_array.*)))
+        KEEP (*(.fini_array*))
         PROVIDE_HIDDEN (__fini_array_end = .);
+        . = ALIGN(4);
     } >FLASH
 
-  /* provide some necessary symbols for startup file to initialize data */
+    /* Used by the startup to initialize data */
     _sidata = LOADADDR(.data);
+
+    /* Initialized data sections into "RAM" Ram type memory */
     .data :
     {
         . = ALIGN(4);
-    /* the symbol '_sdata' will be defined at the data section end start */
+        _sdata = .;        /* create a global symbol at data start */
-    _sdata = .;
+        *(.data)           /* .data sections */
-    *(.data)
+        *(.data*)          /* .data* sections */
-    *(.data*)
+        *(.RamFunc)        /* .RamFunc sections */
+        *(.RamFunc*)       /* .RamFunc* sections */
+
         . = ALIGN(4);
-    /* the symbol '_edata' will be defined at the data section end */
+        _edata = .;        /* define a global symbol at data end */
-    _edata = .;
+
     } >RAM AT> FLASH
 
+    /* Uninitialized data section into "RAM" Ram type memory */
     . = ALIGN(4);
     .bss :
     {
-    /* the symbol '_sbss' will be defined at the bss section start */
+        /* This is used by the startup in order to initialize the .bss section */
-    _sbss = .;
+        _sbss = .;         /* define a global symbol at bss start */
         __bss_start__ = _sbss;
         *(.bss)
         *(.bss*)
         *(COMMON)
+
         . = ALIGN(4);
-    /* the symbol '_ebss' will be defined at the bss section end */
+        _ebss = .;         /* define a global symbol at bss end */
-    _ebss = .;
         __bss_end__ = _ebss;
     } >RAM
 
-  . = ALIGN(8);
+    /* User_heap_stack section, used to check that there is enough "RAM" Ram  type memory left */
-  PROVIDE ( end = _ebss );
+    ._user_heap_stack :
-  PROVIDE ( _end = _ebss );
-
-  .stack ORIGIN(RAM) + LENGTH(RAM) - __stack_size :
     {
-    PROVIDE( _heap_end = . );
+        . = ALIGN(8);
-    . = __stack_size;
+        PROVIDE ( end = . );
-    PROVIDE( _sp = . );
+        PROVIDE ( _end = . );
-  } >RAM AT>RAM
+        . = . + _Min_Heap_Size;
+        . = . + _Min_Stack_Size;
+        . = ALIGN(8);
+    } >RAM
+
+    /* Remove information from the compiler libraries */
+    /DISCARD/ :
+    {
+        libc.a ( * )
+        libm.a ( * )
+        libgcc.a ( * )
     }
 
- /* input sections */
+    .ARM.attributes 0 : { *(.ARM.attributes) }
-GROUP(libgcc.a libc.a libm.a libnosys.a)
+}