X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=src%2Fkernel%2Fao_task.h;h=7549b59838d6abbc4c85a22e5b42ae4ce7e9449e;hb=2f61ef9a5046c39f4eeaaf741031bb6a9607b8a6;hp=f1dbd65426ae709353c0f226eda63a42c76ecaef;hpb=1085ec5d57e0ed5d132f2bbdac1a0b6a32c0ab4a;p=fw%2Faltos

diff --git a/src/kernel/ao_task.h b/src/kernel/ao_task.h
index f1dbd654..7549b598 100644
--- a/src/kernel/ao_task.h
+++ b/src/kernel/ao_task.h
@@ -26,6 +26,17 @@
 #define HAS_TASK_INFO 1
 #endif
 
+/* arm stacks must be 32-bit aligned */
+#ifdef __arm__
+#define AO_STACK_ALIGNMENT __attribute__ ((aligned(4)))
+#endif
+#ifdef SDCC
+#define AO_STACK_ALIGNMENT
+#endif
+#ifdef __AVR__
+#define AO_STACK_ALIGNMENT
+#endif
+
 /* An AltOS task */
 struct ao_task {
 	__xdata void *wchan;		/* current wait channel (NULL if running) */
@@ -33,11 +44,14 @@ struct ao_task {
 	ao_arch_task_members		/* any architecture-specific fields */
 	uint8_t task_id;		/* unique id */
 	__code char *name;		/* task name */
+#ifdef NEWLIB
+	int __errno;			/* storage for errno in newlib libc */
+#endif
 #if HAS_TASK_QUEUE
 	struct ao_list	queue;
 	struct ao_list	alarm_queue;
 #endif
-	uint8_t	stack[AO_STACK_SIZE];	/* saved stack */
+	uint8_t stack[AO_STACK_SIZE] AO_STACK_ALIGNMENT;	/* saved stack */
 #if HAS_SAMPLE_PROFILE
 	uint32_t ticks;
 	uint32_t yields;