Commit 63890e25 authored Oct 29, 2024 by Fabio Baltieri Committed by Mahesh Mahadevan Oct 31, 2024

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 <wilfried.chauveau@arm.com>
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>

parent 7015a0ee

arch/arm/core/cortex_m/thread.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;
		}

Admin message