Reorder reset_arch: param forced, elf header, gdb conf

Signed-off-by: José Luis Di Biase <[email protected]>

gef.py

@@ -3677,21 +3677,22 @@ def reset_architecture(arch: Optional[str] = None) -> None:
             raise OSError(f"Specified arch {arch.upper()} is not supported")
         return
 
+    # check for elf header architecture
+    if gef.binary.e_machine:
+        try:
+            gef.arch = arches[gef.binary.e_machine]()
+        except KeyError:
+            raise OSError(f"CPU type is currently not supported: {gef.binary.e_machine}")
+        return
+
+    # last resort, use gdb default architecture
     gdb_arch = get_arch()
 
     preciser_arch = next((a for a in arches.values() if a.supports_gdb_arch(gdb_arch)), None)
     if preciser_arch:
         gef.arch = preciser_arch()
         return
 
-    # last resort, use the info from elf header to find it from the known architectures
-    try:
-        arch_name = gef.binary.e_machine if gef.binary else gdb_arch
-        gef.arch = arches[arch_name]()
-    except KeyError:
-        raise OSError(f"CPU type is currently not supported: {get_arch()}")
-    return
-
 
 @lru_cache()
 def cached_lookup_type(_type: str) -> Optional[gdb.Type]: