variants/_ldscripts: Fix static thread data alignment.

The _static_thread_data struct contains int64_t members that require 8-byte
alignment. When placed in a 4-byte aligned section, it causes the linker to
insert padding, which in turn causes __static_thread_data_list_start to point
to the padding not to the first iterable.

GNU ld automatically aligns output sections based on the strictest alignment
requirement of input sections, so moving __static_thread_data_list to its own
section fixes the problem.

Signed-off-by: iabdalkader <i.abdalkader@gmail.com>

Author: iabdalkader

variants/_ldscripts/build-dynamic.ld

@@ -34,9 +34,11 @@ SECTIONS {
         KEEP (*(.ctors))
         KEEP (*(.dtors))
         KEEP (*(.fini))
+    }
 
+    .static_thread_data_area : {
         __static_thread_data_list_start = .;
-        KEEP(*(SORT_BY_NAME(.__static_thread_data.static.*)));
+        KEEP(*(.static_thread_data_area SORT_BY_NAME(.__static_thread_data.*)));
         __static_thread_data_list_end = .;
     }
 
@@ -87,4 +89,4 @@ SECTIONS {
     .got : {
         KEEP(*(.got .got.* .got.plt .got.plt*))
     }
-}
+}

variants/_ldscripts/build-static.ld

@@ -23,9 +23,11 @@ SECTIONS {
         KEEP (*(.ctors))
         KEEP (*(.dtors))
         KEEP (*(.fini))
+    } >FLASH
 
+    .static_thread_data_area : {
         __static_thread_data_list_start = .;
-        KEEP(*(SORT_BY_NAME(.__static_thread_data.static.*)));
+        KEEP(*(.static_thread_data_area SORT_BY_NAME(.__static_thread_data.*)));
         __static_thread_data_list_end = .;
     } >FLASH