arch: arm: cortex_m: add memory to the clobber list

Add "memory" to the clobber list"

From GCC 14 the compiler optimizes away memory accesses that do not
impact the asm block. Adding the memory to the clobber list lets the
compiler know that the memory state is to be preserved.

Signed-off-by: Wilfried Chauveau <[email protected]>
Signed-off-by: Fabio Baltieri <[email protected]>
(cherry picked from commit 63890e2)

Author: fabiobaltieri

arch/arm/core/cortex_m/thread.c

@@ -588,7 +588,7 @@ void arch_switch_to_main_thread(struct k_thread *main_thread, char *stack_ptr,
 	"bx    r4\n"		/* We don’t intend to return, so there is no need to link. */
 	:
 	: "r" (_main), "r" (stack_ptr)
-	: "r0", "r1", "r2", "r3", "r4", "ip", "lr");
+	: "r0", "r1", "r2", "r3", "r4", "ip", "lr", "memory");
 
 	CODE_UNREACHABLE;
 }