sched/spawn: Support the stack address argument

Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>

include/spawn.h

@@ -85,7 +85,8 @@ struct posix_spawnattr_s
 #ifndef CONFIG_BUILD_KERNEL
   /* Used only by task_spawn (non-standard) */
 
-  size_t   stacksize;            /* Task stack size */
+  FAR void *stackaddr;           /* Task stack address */
+  size_t    stacksize;           /* Task stack size */
 #endif
 
 #ifdef CONFIG_SCHED_SPORADIC
@@ -211,8 +212,13 @@ int posix_spawnattr_setsigmask(FAR posix_spawnattr_t *attr,
  * task_spawn()
  */
 
+int task_spawnattr_getstackaddr(FAR const posix_spawnattr_t *attr,
+                                FAR void **stackaddr);
+int task_spawnattr_setstackaddr(FAR posix_spawnattr_t *attr,
+                                FAR void *stackaddr);
+
 int task_spawnattr_getstacksize(FAR const posix_spawnattr_t *attr,
-                                size_t *stacksize);
+                                FAR size_t *stacksize);
 int task_spawnattr_setstacksize(FAR posix_spawnattr_t *attr,
                                 size_t stacksize);
 

libs/libc/spawn/Make.defs

@@ -32,6 +32,7 @@ CSRCS += lib_psa_init.c lib_psa_setflags.c lib_psa_setschedparam.c
 CSRCS += lib_psa_setschedpolicy.c lib_psa_getsigmask.c lib_psa_setsigmask.c
 
 ifneq ($(CONFIG_BUILD_KERNEL),y)
+CSRCS += lib_psa_getstackaddr.c lib_psa_setstackaddr.c
 CSRCS += lib_psa_getstacksize.c lib_psa_setstacksize.c
 ifeq ($(CONFIG_LIB_SYSCALL),y)
 CSRCS += lib_task_spawn.c

libs/libc/spawn/lib_psa_getstackaddr.c

@@ -0,0 +1,63 @@
+/****************************************************************************
+ * libs/libc/spawn/lib_psa_getstackaddr.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sched.h>
+#include <spawn.h>
+#include <assert.h>
+
+#ifndef CONFIG_BUILD_KERNEL
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: task_spawnattr_getstackaddr
+ *
+ * Description:
+ *   The task_spawnattr_getstackaddr() function will obtain the value of
+ *   the spawn-stackaddr attribute from the attributes object referenced
+ *   by attr.
+ *
+ * Input Parameters:
+ *   attr - The address spawn attributes to be queried.
+ *   stackaddr - The location to return the spawn-stackaddr value.
+ *
+ * Returned Value:
+ *   On success, these functions return 0; on failure they return an error
+ *   number from <errno.h>.
+ *
+ ****************************************************************************/
+
+int task_spawnattr_getstackaddr(FAR const posix_spawnattr_t *attr,
+                                FAR void **stackaddr)
+{
+  DEBUGASSERT(attr && stackaddr);
+  *stackaddr = attr->stackaddr;
+  return OK;
+}
+
+#endif /* !CONFIG_BUILD_KERNEL */

libs/libc/spawn/lib_psa_getstacksize.c

@@ -53,7 +53,7 @@
  ****************************************************************************/
 
 int task_spawnattr_getstacksize(FAR const posix_spawnattr_t *attr,
-                                size_t *stacksize)
+                                FAR size_t *stacksize)
 {
   DEBUGASSERT(attr && stacksize);
   *stacksize = attr->stacksize;

libs/libc/spawn/lib_psa_setstackaddr.c

@@ -0,0 +1,63 @@
+/****************************************************************************
+ * libs/libc/spawn/lib_psa_setstackaddr.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sched.h>
+#include <spawn.h>
+#include <assert.h>
+
+#ifndef CONFIG_BUILD_KERNEL
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: task_spawnattr_setstackaddr
+ *
+ * Description:
+ *   The task_spawnattr_setstackaddr() function shall set the spawn-
+ *   stackaddr attribute in an initialized attributes object referenced
+ *   by attr.
+ *
+ * Input Parameters:
+ *   attr  - The address spawn attributes to be used.
+ *   stackaddr - The new stackaddr to set.
+ *
+ * Returned Value:
+ *   On success, these functions return 0; on failure they return an error
+ *   number from <errno.h>.
+ *
+ ****************************************************************************/
+
+int task_spawnattr_setstackaddr(FAR posix_spawnattr_t *attr,
+                                FAR void *stackaddr)
+{
+  DEBUGASSERT(attr);
+  attr->stackaddr = stackaddr;
+  return OK;
+}
+
+#endif /* !CONFIG_BUILD_KERNEL */