Strip down linker script

linker.lds

@@ -5,10 +5,14 @@ PROVIDE( _stack_size = __stack_size );
 
 MEMORY
 {
-    /* CH32V20x_D6 -> 10 KB SRAM */
-    /* allow full flash (incl. non-zero-wait) */
-    FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 224K
-    RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 10K
+    /* Try to squeeze down to this target size */
+    FLASH (rx) : ORIGIN = 0x00000000, LENGTH = 2K
+    /* We have a total of 512 bytes here.
+    - Need 256 bytes to buffer a flash page across USB packets
+    - Need space for USB buffers
+    - Tiny tiny amount of free space
+    */
+    USBRAM (rw) : ORIGIN = 0x400060c0, LENGTH = 64
 }
 
 SECTIONS
@@ -29,29 +33,6 @@ SECTIONS
         . = ALIGN(4);
     } >FLASH
 
-    .preinit_array :
-    {
-        PROVIDE_HIDDEN (__preinit_array_start = .);
-        KEEP (*(.preinit_array))
-        PROVIDE_HIDDEN (__preinit_array_end = .);
-    } >FLASH
-
-    .init_array :
-    {
-        PROVIDE_HIDDEN (__init_array_start = .);
-        KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
-        KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
-        PROVIDE_HIDDEN (__init_array_end = .);
-    } >FLASH
-
-    .fini_array :
-    {
-        PROVIDE_HIDDEN (__fini_array_start = .);
-        KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
-        KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
-        PROVIDE_HIDDEN (__fini_array_end = .);
-    } >FLASH
-
     PROVIDE(_data_lma = .);
 
     .data :
@@ -73,7 +54,7 @@ SECTIONS
         *(.srodata .srodata.*)
         . = ALIGN(4);
         PROVIDE( _edata = .);
-    } >RAM AT>FLASH
+    } >USBRAM AT>FLASH
 
     .bss :
     {
@@ -85,15 +66,7 @@ SECTIONS
         *(COMMON*)
         . = ALIGN(4);
         PROVIDE( _ebss = .);
-    } >RAM
+    } >USBRAM
 
     PROVIDE( _end = _ebss);
-
-    .stack ORIGIN(RAM) + LENGTH(RAM) - __stack_size :
-    {
-        PROVIDE( _heap_end = . );
-        PROVIDE( _susrstack = . );
-        . = . + __stack_size;
-        PROVIDE( _eusrstack = .);
-    } >RAM 
 }