Merge branch 'gdb/bt_on_invalid_pc' into 'master'

gdb: Modify PC in case of invalid PC

See merge request espressif/esp-idf!8391

components/esp32s2/ld/esp32s2.project.ld.in

@@ -142,6 +142,7 @@ SECTIONS
     . = 0x3C0;
     KEEP(*(.DoubleExceptionVector.text));
     . = 0x400;
+    _invalid_pc_placeholder = ABSOLUTE(.);
     *(.*Vector.literal)
 
     *(.UserEnter.literal);