feat(core): modify bootloader linkerscript to support rust

core/embed/bootloader/memory.ld

@@ -23,7 +23,7 @@ ccmram_end = ORIGIN(CCMRAM) + LENGTH(CCMRAM);
 sram_start = ORIGIN(SRAM);
 sram_end = ORIGIN(SRAM) + LENGTH(SRAM);
 
-_codelen = SIZEOF(.flash) + SIZEOF(.data);
+_codelen = SIZEOF(.flash) + SIZEOF(.data) + SIZEOF(.exidx) + SIZEOF(.align);
 
 SECTIONS {
   .header : ALIGN(4) {
@@ -36,6 +36,15 @@ SECTIONS {
     *(.text*);
     . = ALIGN(4);
     *(.rodata*);
+    . = ALIGN(4);
+  } >FLASH AT>FLASH
+
+  /* exception handling info generated by llvm which should consist of 8 bytes of "cantunwind" */
+  .exidx : ALIGN(4) {
+    *(.ARM.exidx*);
+  } >FLASH AT>FLASH
+
+  .align : ALIGN(4) {
     . = ALIGN(512);
   } >FLASH AT>FLASH