*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
#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) */
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;