diff --git a/arch/arm/src/common/up_releasestack.c b/arch/arm/src/common/up_releasestack.c
index 7090916dde2..45ca09df23f 100644
--- a/arch/arm/src/common/up_releasestack.c
+++ b/arch/arm/src/common/up_releasestack.c
@@ -104,14 +104,20 @@ void up_release_stack(FAR struct tcb_s *dtcb, uint8_t ttype)
 
       if (ttype == TCB_FLAG_TTYPE_KERNEL)
         {
-          sched_kfree(dtcb->stack_alloc_ptr);
+          if (kmm_heapmember(dtcb->stack_alloc_ptr))
+            {
+              sched_kfree(dtcb->stack_alloc_ptr);
+            }
         }
       else
 #endif
         {
           /* Use the user-space allocator if this is a task or pthread */
 
-          sched_ufree(dtcb->stack_alloc_ptr);
+          if (umm_heapmember(dtcb->stack_alloc_ptr))
+            {
+              sched_ufree(dtcb->stack_alloc_ptr);
+            }
         }
 
       /* Mark the stack freed */
diff --git a/arch/avr/src/common/up_releasestack.c b/arch/avr/src/common/up_releasestack.c
index f1abcd15d90..a687609f2f4 100644
--- a/arch/avr/src/common/up_releasestack.c
+++ b/arch/avr/src/common/up_releasestack.c
@@ -101,14 +101,20 @@ void up_release_stack(FAR struct tcb_s *dtcb, uint8_t ttype)
 
       if (ttype == TCB_FLAG_TTYPE_KERNEL)
         {
-          sched_kfree(dtcb->stack_alloc_ptr);
+          if (kmm_heapmember(dtcb->stack_alloc_ptr))
+            {
+              sched_kfree(dtcb->stack_alloc_ptr);
+            }
         }
       else
 #endif
         {
           /* Use the user-space allocator if this is a task or pthread */
 
-          sched_ufree(dtcb->stack_alloc_ptr);
+          if (umm_heapmember(dtcb->stack_alloc_ptr))
+            {
+              sched_ufree(dtcb->stack_alloc_ptr);
+            }
         }
 
       /* Mark the stack freed */
diff --git a/arch/hc/src/common/up_releasestack.c b/arch/hc/src/common/up_releasestack.c
index 5280674c99a..e82184491c9 100644
--- a/arch/hc/src/common/up_releasestack.c
+++ b/arch/hc/src/common/up_releasestack.c
@@ -101,14 +101,20 @@ void up_release_stack(FAR struct tcb_s *dtcb, uint8_t ttype)
 
       if (ttype == TCB_FLAG_TTYPE_KERNEL)
         {
-          sched_kfree(dtcb->stack_alloc_ptr);
+          if (kmm_heapmember(dtcb->stack_alloc_ptr))
+            {
+              sched_kfree(dtcb->stack_alloc_ptr);
+            }
         }
       else
 #endif
         {
           /* Use the user-space allocator if this is a task or pthread */
 
-          sched_ufree(dtcb->stack_alloc_ptr);
+          if (umm_heapmember(dtcb->stack_alloc_ptr))
+            {
+              sched_ufree(dtcb->stack_alloc_ptr);
+            }
         }
 
       /* Mark the stack freed */
diff --git a/arch/mips/src/common/up_releasestack.c b/arch/mips/src/common/up_releasestack.c
index d08bc2e6d91..550254874a7 100644
--- a/arch/mips/src/common/up_releasestack.c
+++ b/arch/mips/src/common/up_releasestack.c
@@ -101,14 +101,20 @@ void up_release_stack(FAR struct tcb_s *dtcb, uint8_t ttype)
 
       if (ttype == TCB_FLAG_TTYPE_KERNEL)
         {
-          sched_kfree(dtcb->stack_alloc_ptr);
+          if (kmm_heapmember(dtcb->stack_alloc_ptr))
+            {
+              sched_kfree(dtcb->stack_alloc_ptr);
+            }
         }
       else
 #endif
         {
           /* Use the user-space allocator if this is a task or pthread */
 
-          sched_ufree(dtcb->stack_alloc_ptr);
+          if (umm_heapmember(dtcb->stack_alloc_ptr))
+            {
+              sched_ufree(dtcb->stack_alloc_ptr);
+            }
         }
 
       /* Mark the stack freed */
diff --git a/arch/misoc/src/lm32/lm32_releasestack.c b/arch/misoc/src/lm32/lm32_releasestack.c
index 63f4ab8f993..60af9daf50c 100644
--- a/arch/misoc/src/lm32/lm32_releasestack.c
+++ b/arch/misoc/src/lm32/lm32_releasestack.c
@@ -94,14 +94,20 @@ void up_release_stack(FAR struct tcb_s *dtcb, uint8_t ttype)
 
       if (ttype == TCB_FLAG_TTYPE_KERNEL)
         {
-          sched_kfree(dtcb->stack_alloc_ptr);
+          if (kmm_heapmember(dtcb->stack_alloc_ptr))
+            {
+              sched_kfree(dtcb->stack_alloc_ptr);
+            }
         }
       else
 #endif
         {
           /* Use the user-space allocator if this is a task or pthread */
 
-          sched_ufree(dtcb->stack_alloc_ptr);
+          if (umm_heapmember(dtcb->stack_alloc_ptr))
+            {
+              sched_ufree(dtcb->stack_alloc_ptr);
+            }
         }
 
       /* Mark the stack freed */
diff --git a/arch/or1k/src/common/up_releasestack.c b/arch/or1k/src/common/up_releasestack.c
index 674c1b05157..82c0555094d 100644
--- a/arch/or1k/src/common/up_releasestack.c
+++ b/arch/or1k/src/common/up_releasestack.c
@@ -104,14 +104,20 @@ void up_release_stack(FAR struct tcb_s *dtcb, uint8_t ttype)
 
       if (ttype == TCB_FLAG_TTYPE_KERNEL)
         {
-          sched_kfree(dtcb->stack_alloc_ptr);
+          if (kmm_heapmember(dtcb->stack_alloc_ptr))
+            {
+              sched_kfree(dtcb->stack_alloc_ptr);
+            }
         }
       else
 #endif
         {
           /* Use the user-space allocator if this is a task or pthread */
 
-          sched_ufree(dtcb->stack_alloc_ptr);
+          if (umm_heapmember(dtcb->stack_alloc_ptr))
+            {
+              sched_ufree(dtcb->stack_alloc_ptr);
+            }
         }
 
       /* Mark the stack freed */
diff --git a/arch/renesas/src/common/up_releasestack.c b/arch/renesas/src/common/up_releasestack.c
index 5b309bde16d..13629137209 100644
--- a/arch/renesas/src/common/up_releasestack.c
+++ b/arch/renesas/src/common/up_releasestack.c
@@ -101,14 +101,20 @@ void up_release_stack(FAR struct tcb_s *dtcb, uint8_t ttype)
 
       if (ttype == TCB_FLAG_TTYPE_KERNEL)
         {
-          sched_kfree(dtcb->stack_alloc_ptr);
+          if (kmm_heapmember(dtcb->stack_alloc_ptr))
+            {
+              sched_kfree(dtcb->stack_alloc_ptr);
+            }
         }
       else
 #endif
         {
           /* Use the user-space allocator if this is a task or pthread */
 
-          sched_ufree(dtcb->stack_alloc_ptr);
+          if (umm_heapmember(dtcb->stack_alloc_ptr))
+            {
+              sched_ufree(dtcb->stack_alloc_ptr);
+            }
         }
 
       /* Mark the stack freed */
diff --git a/arch/risc-v/src/common/up_releasestack.c b/arch/risc-v/src/common/up_releasestack.c
index dac7cea0d6d..149d3c2988f 100644
--- a/arch/risc-v/src/common/up_releasestack.c
+++ b/arch/risc-v/src/common/up_releasestack.c
@@ -101,14 +101,20 @@ void up_release_stack(FAR struct tcb_s *dtcb, uint8_t ttype)
 
       if (ttype == TCB_FLAG_TTYPE_KERNEL)
         {
-          sched_kfree(dtcb->stack_alloc_ptr);
+          if (kmm_heapmember(dtcb->stack_alloc_ptr))
+            {
+              sched_kfree(dtcb->stack_alloc_ptr);
+            }
         }
       else
 #endif
         {
           /* Use the user-space allocator if this is a task or pthread */
 
-          sched_ufree(dtcb->stack_alloc_ptr);
+          if (umm_heapmember(dtcb->stack_alloc_ptr))
+            {
+              sched_ufree(dtcb->stack_alloc_ptr);
+            }
         }
 
       /* Mark the stack freed */
diff --git a/arch/sim/src/up_releasestack.c b/arch/sim/src/up_releasestack.c
index 87a30261264..98d54171f29 100644
--- a/arch/sim/src/up_releasestack.c
+++ b/arch/sim/src/up_releasestack.c
@@ -81,7 +81,10 @@ void up_release_stack(FAR struct tcb_s *dtcb, uint8_t ttype)
 
   if (dtcb->stack_alloc_ptr)
     {
-      sched_ufree(dtcb->stack_alloc_ptr);
+      if (umm_heapmember(dtcb->stack_alloc_ptr))
+        {
+          sched_ufree(dtcb->stack_alloc_ptr);
+        }
     }
 
   /* Mark the stack freed */
diff --git a/arch/x86/src/i486/up_releasestack.c b/arch/x86/src/i486/up_releasestack.c
index e83434024ee..ace852c2cc3 100644
--- a/arch/x86/src/i486/up_releasestack.c
+++ b/arch/x86/src/i486/up_releasestack.c
@@ -101,14 +101,20 @@ void up_release_stack(FAR struct tcb_s *dtcb, uint8_t ttype)
 
       if (ttype == TCB_FLAG_TTYPE_KERNEL)
         {
-          sched_kfree(dtcb->stack_alloc_ptr);
+          if (kmm_heapmember(dtcb->stack_alloc_ptr))
+            {
+              sched_kfree(dtcb->stack_alloc_ptr);
+            }
         }
       else
 #endif
         {
           /* Use the user-space allocator if this is a task or pthread */
 
-          sched_ufree(dtcb->stack_alloc_ptr);
+          if (umm_heapmember(dtcb->stack_alloc_ptr))
+            {
+              sched_ufree(dtcb->stack_alloc_ptr);
+            }
         }
 
       /* Mark the stack freed */
diff --git a/arch/xtensa/src/common/xtensa_releasestack.c b/arch/xtensa/src/common/xtensa_releasestack.c
index 738da79284a..44768d36647 100644
--- a/arch/xtensa/src/common/xtensa_releasestack.c
+++ b/arch/xtensa/src/common/xtensa_releasestack.c
@@ -93,14 +93,20 @@ void up_release_stack(FAR struct tcb_s *dtcb, uint8_t ttype)
 
       if (ttype == TCB_FLAG_TTYPE_KERNEL)
         {
-          sched_kfree(dtcb->stack_alloc_ptr);
+          if (kmm_heapmember(dtcb->stack_alloc_ptr))
+            {
+              sched_kfree(dtcb->stack_alloc_ptr);
+            }
         }
       else
 #endif
         {
           /* Use the user-space allocator if this is a task or pthread */
 
-          sched_ufree(dtcb->stack_alloc_ptr);
+          if (umm_heapmember(dtcb->stack_alloc_ptr))
+            {
+              sched_ufree(dtcb->stack_alloc_ptr);
+            }
         }
 
       /* Mark the stack freed */
diff --git a/arch/z16/src/common/up_releasestack.c b/arch/z16/src/common/up_releasestack.c
index 8d0698ecfdc..6d5f40823cc 100644
--- a/arch/z16/src/common/up_releasestack.c
+++ b/arch/z16/src/common/up_releasestack.c
@@ -90,7 +90,10 @@ void up_release_stack(FAR struct tcb_s *dtcb, uint8_t ttype)
 
   if (dtcb->stack_alloc_ptr)
     {
-      sched_ufree(dtcb->stack_alloc_ptr);
+      if (umm_heapmember(dtcb->stack_alloc_ptr))
+        {
+          sched_ufree(dtcb->stack_alloc_ptr);
+        }
 
       /* Mark the stack freed */
 
diff --git a/arch/z80/src/common/up_releasestack.c b/arch/z80/src/common/up_releasestack.c
index 5862240d1f9..101953d7562 100644
--- a/arch/z80/src/common/up_releasestack.c
+++ b/arch/z80/src/common/up_releasestack.c
@@ -101,14 +101,20 @@ void up_release_stack(FAR struct tcb_s *dtcb, uint8_t ttype)
 
       if (ttype == TCB_FLAG_TTYPE_KERNEL)
         {
-          sched_kfree(dtcb->stack_alloc_ptr);
+          if (kmm_heapmember(dtcb->stack_alloc_ptr))
+            {
+              sched_kfree(dtcb->stack_alloc_ptr);
+            }
         }
       else
 #endif
         {
           /* Use the user-space allocator if this is a task or pthread */
 
-          sched_ufree(dtcb->stack_alloc_ptr);
+          if (umm_heapmember(dtcb->stack_alloc_ptr))
+            {
+              sched_ufree(dtcb->stack_alloc_ptr);
+            }
         }
 
       /* Mark the stack freed */
diff --git a/include/nuttx/pthread.h b/include/nuttx/pthread.h
index 27fb5dd99c8..ce1202e8fbe 100644
--- a/include/nuttx/pthread.h
+++ b/include/nuttx/pthread.h
@@ -71,6 +71,7 @@
     0,                        /* low_priority */ \
     0,                        /* max_repl */ \
     0,                        /* affinity */ \
+    NULL,                     /* stackaddr */ \
     PTHREAD_STACK_DEFAULT,    /* stacksize */ \
     {0, 0},                   /* repl_period */ \
     {0, 0}                    /* budget */ \
@@ -83,6 +84,7 @@
     PTHREAD_EXPLICIT_SCHED,   /* inheritsched */ \
     0,                        /* low_priority */ \
     0,                        /* max_repl */ \
+    NULL,                     /* stackaddr */ \
     PTHREAD_STACK_DEFAULT,    /* stacksize */ \
     {0, 0},                   /* repl_period */ \
     {0, 0},                   /* budget */ \
@@ -94,6 +96,7 @@
     PTHREAD_DEFAULT_POLICY,   /* policy */ \
     PTHREAD_EXPLICIT_SCHED,   /* inheritsched */ \
     0,                        /* affinity */ \
+    NULL,                     /* stackaddr */ \
     PTHREAD_STACK_DEFAULT,    /* stacksize */ \
   }
 #else
@@ -102,6 +105,7 @@
     PTHREAD_DEFAULT_PRIORITY, /* priority */ \
     PTHREAD_DEFAULT_POLICY,   /* policy */ \
     PTHREAD_EXPLICIT_SCHED,   /* inheritsched */ \
+    NULL,                     /* stackaddr */ \
     PTHREAD_STACK_DEFAULT,    /* stacksize */ \
   }
 #endif
diff --git a/include/pthread.h b/include/pthread.h
index e70ad06e5be..c97dd1da5f6 100644
--- a/include/pthread.h
+++ b/include/pthread.h
@@ -227,6 +227,7 @@ struct pthread_attr_s
   cpu_set_t affinity;          /* Set of permitted CPUs for the thread */
 #endif
 
+  FAR void  *stackaddr;        /* Address of memory to be used as stack */
   size_t stacksize;            /* Size of the stack allocated for the pthread */
 
 #ifdef CONFIG_SCHED_SPORADIC
@@ -406,6 +407,13 @@ int pthread_attr_getaffinity_np(FAR const pthread_attr_t *attr,
 int pthread_attr_setstacksize(FAR pthread_attr_t *attr, long stacksize);
 int pthread_attr_getstacksize(FAR const pthread_attr_t *attr, long *stackaddr);
 
+/* Set or obtain stack address and size */
+
+int pthread_attr_setstack(FAR pthread_attr_t *attr,
+                          FAR void *stackaddr, long stacksize);
+int pthread_attr_getstack(FAR pthread_attr_t *attr,
+                          FAR void **stackaddr, FAR long *stacksize);
+
 /* To create a thread object and runnable thread, a routine must be specified
  * as the new thread's start routine.  An argument may be passed to this
  * routine, as an untyped address; an untyped address may also be returned as
diff --git a/libs/libc/pthread/Make.defs b/libs/libc/pthread/Make.defs
index 2c2a824b63a..e8a521b8a3a 100644
--- a/libs/libc/pthread/Make.defs
+++ b/libs/libc/pthread/Make.defs
@@ -41,6 +41,7 @@ CSRCS += pthread_attr_init.c pthread_attr_destroy.c
 CSRCS += pthread_attr_setschedpolicy.c pthread_attr_getschedpolicy.c
 CSRCS += pthread_attr_setinheritsched.c pthread_attr_getinheritsched.c
 CSRCS += pthread_attr_setstacksize.c pthread_attr_getstacksize.c
+CSRCS += pthread_attr_setstack.c pthread_attr_getstack.c
 CSRCS += pthread_attr_setschedparam.c pthread_attr_getschedparam.c
 CSRCS += pthread_barrierattr_init.c pthread_barrierattr_destroy.c
 CSRCS += pthread_barrierattr_getpshared.c pthread_barrierattr_setpshared.c
diff --git a/libs/libc/pthread/pthread_attr_getstack.c b/libs/libc/pthread/pthread_attr_getstack.c
new file mode 100644
index 00000000000..e2489e2ab65
--- /dev/null
+++ b/libs/libc/pthread/pthread_attr_getstack.c
@@ -0,0 +1,88 @@
+/****************************************************************************
+ * libs/libc/pthread/pthread_attr_getstack.c
+ *
+ *   Copyright (C) 2018 Pinecone. All rights reserved.
+ *   Author:
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <sys/types.h>
+#include <pthread.h>
+#include <string.h>
+#include <debug.h>
+#include <errno.h>
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name:  pthread_attr_getstack
+ *
+ * Description:
+ *
+ * Parameters:
+ *   attr
+ *   stacksize
+ *
+ * Return Value:
+ *   0 if successful.  Otherwise, an error code.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_attr_getstack(FAR pthread_attr_t *attr,
+                          FAR void **stackaddr, FAR long *stacksize)
+{
+  int ret;
+
+  linfo("attr=0x%p stackaddr=0x%p stacksize=0x%p\n", attr, stackaddr, stacksize);
+
+  if (!attr || !stackaddr || !stacksize)
+    {
+      ret = EINVAL;
+    }
+  else
+    {
+      *stackaddr = attr->stackaddr;
+      *stacksize = attr->stacksize;
+      ret = OK;
+    }
+
+  linfo("Returning %d\n", ret);
+  return ret;
+}
+
+
diff --git a/libs/libc/pthread/pthread_attr_setstack.c b/libs/libc/pthread/pthread_attr_setstack.c
new file mode 100644
index 00000000000..327203db6f8
--- /dev/null
+++ b/libs/libc/pthread/pthread_attr_setstack.c
@@ -0,0 +1,89 @@
+/****************************************************************************
+ * libs/libc/pthread/pthread_attr_setstack.c
+ *
+ *   Copyright (C) 2018 Pinecone. All rights reserved.
+ *   Author:
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <pthread.h>
+#include <string.h>
+#include <debug.h>
+#include <errno.h>
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name:  pthread_attr_setstack
+ *
+ * Description:
+ *
+ * Parameters:
+ *   attr
+ *   stackaddr
+ *   stacksize
+ *
+ * Return Value:
+ *   0 if successful.  Otherwise, an error code.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_attr_setstack(FAR pthread_attr_t *attr,
+                          FAR void *stackaddr, long stacksize)
+{
+  int ret;
+
+  linfo("attr=0x%p stackaddr=0x%p stacksize=%ld\n", attr, stackaddr, stacksize);
+
+  if (!attr || !stackaddr || stacksize < PTHREAD_STACK_MIN)
+    {
+      ret = EINVAL;
+    }
+  else
+    {
+      attr->stackaddr = stackaddr;
+      attr->stacksize = stacksize;
+      ret = OK;
+    }
+
+  linfo("Returning %d\n", ret);
+  return ret;
+}
+
diff --git a/sched/pthread/pthread_create.c b/sched/pthread/pthread_create.c
index df03248fd2e..a69c9bccf4d 100644
--- a/sched/pthread/pthread_create.c
+++ b/sched/pthread/pthread_create.c
@@ -302,10 +302,21 @@ int pthread_create(FAR pthread_t *thread, FAR const pthread_attr_t *attr,
       goto errout_with_tcb;
     }
 
-  /* Allocate the stack for the TCB */
+  if (attr->stackaddr)
+    {
+      /* Use pre-allocated stack */
+
+      ret = up_use_stack((FAR struct tcb_s *)ptcb, attr->stackaddr,
+                         attr->stacksize);
+    }
+  else
+    {
+      /* Allocate the stack for the TCB */
+
+      ret = up_create_stack((FAR struct tcb_s *)ptcb, attr->stacksize,
+                            TCB_FLAG_TTYPE_PTHREAD);
+    }
 
-  ret = up_create_stack((FAR struct tcb_s *)ptcb, attr->stacksize,
-                        TCB_FLAG_TTYPE_PTHREAD);
   if (ret != OK)
     {
       errcode = ENOMEM;