fix: add additional .ltorg directives to GCC CM3/CM4 mpu ports (#473)

Co-authored-by: Nils Niemann <[email protected]>

Author: niniemann

portable/GCC/ARM_CM3_MPU/port.c

@@ -369,6 +369,7 @@ static void prvRestoreContextOfFirstTask( void )
         "	ldr r14, =0xfffffffd			\n"/* Load exec return code. */
         "	bx r14							\n"
         "									\n"
+        "	.ltorg							\n"/* Assemble current literal pool to avoid offset-out-of-bound errors with lto. */
         "	.align 4						\n"
         "pxCurrentTCBConst2: .word pxCurrentTCB	\n"
     );
@@ -579,6 +580,7 @@ void xPortPendSVHandler( void )
         "	msr psp, r0							\n"
         "	bx r14								\n"
         "										\n"
+        "	.ltorg								\n"/* Assemble current literal pool to avoid offset-out-of-bound errors with lto. */
         "	.align 4							\n"
         "pxCurrentTCBConst: .word pxCurrentTCB	\n"
         ::"i" ( configMAX_SYSCALL_INTERRUPT_PRIORITY )

portable/GCC/ARM_CM4_MPU/port.c

@@ -394,6 +394,7 @@ static void prvRestoreContextOfFirstTask( void )
         "	msr	basepri, r0					\n"
         "	bx r14							\n"
         "									\n"
+        "	.ltorg							\n"/* Assemble current literal pool to avoid offset-out-of-bound errors with lto. */
         "	.align 4						\n"
         "pxCurrentTCBConst2: .word pxCurrentTCB	\n"
     );
@@ -631,6 +632,7 @@ void xPortPendSVHandler( void )
         "	msr psp, r0							\n"
         "	bx r14								\n"
         "										\n"
+        "	.ltorg								\n"/* Assemble the current literal pool to avoid offset-out-of-bound errors with lto. */
         "	.align 4							\n"
         "pxCurrentTCBConst: .word pxCurrentTCB	\n"
         ::"i" ( configMAX_SYSCALL_INTERRUPT_PRIORITY )