diff --git a/arch/arm/src/arm/arm_initialstate.c b/arch/arm/src/arm/arm_initialstate.c
index 13c9c92889..54d21eba18 100644
--- a/arch/arm/src/arm/arm_initialstate.c
+++ b/arch/arm/src/arm/arm_initialstate.c
@@ -75,8 +75,10 @@ void up_initial_state(struct tcb_s *tcb)
 
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb, (void *)(g_idle_topstack -
-        CONFIG_IDLETHREAD_STACKSIZE), CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = (void *)(g_idle_topstack -
+                                      CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->adj_stack_ptr   = (void *)g_idle_topstack;
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   /* Initialize the initial exception register context structure */
diff --git a/arch/arm/src/armv6-m/arm_initialstate.c b/arch/arm/src/armv6-m/arm_initialstate.c
index 25ccafa5de..01163e6223 100644
--- a/arch/arm/src/armv6-m/arm_initialstate.c
+++ b/arch/arm/src/armv6-m/arm_initialstate.c
@@ -77,8 +77,10 @@ void up_initial_state(struct tcb_s *tcb)
 
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb, (void *)(g_idle_topstack -
-        CONFIG_IDLETHREAD_STACKSIZE), CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = (void *)(g_idle_topstack -
+                                      CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->adj_stack_ptr   = (void *)g_idle_topstack;
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   /* Initialize the initial exception register context structure */
diff --git a/arch/arm/src/armv7-a/arm_initialstate.c b/arch/arm/src/armv7-a/arm_initialstate.c
index 65af4b0042..bd1ef1f0c8 100644
--- a/arch/arm/src/armv7-a/arm_initialstate.c
+++ b/arch/arm/src/armv7-a/arm_initialstate.c
@@ -75,8 +75,10 @@ void up_initial_state(struct tcb_s *tcb)
 
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb, (void *)(g_idle_topstack -
-        CONFIG_IDLETHREAD_STACKSIZE), CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = (void *)(g_idle_topstack -
+                                      CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->adj_stack_ptr   = (void *)g_idle_topstack;
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   /* Initialize the initial exception register context structure */
diff --git a/arch/arm/src/armv7-m/arm_initialstate.c b/arch/arm/src/armv7-m/arm_initialstate.c
index 0a02a4c9a1..6420de8f80 100644
--- a/arch/arm/src/armv7-m/arm_initialstate.c
+++ b/arch/arm/src/armv7-m/arm_initialstate.c
@@ -63,8 +63,10 @@ void up_initial_state(struct tcb_s *tcb)
 
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb, (void *)(g_idle_topstack -
-        CONFIG_IDLETHREAD_STACKSIZE), CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = (void *)(g_idle_topstack -
+                                      CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->adj_stack_ptr   = (void *)g_idle_topstack;
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   /* Initialize the initial exception register context structure */
diff --git a/arch/arm/src/armv7-r/arm_initialstate.c b/arch/arm/src/armv7-r/arm_initialstate.c
index edbf811859..f9ba39186c 100644
--- a/arch/arm/src/armv7-r/arm_initialstate.c
+++ b/arch/arm/src/armv7-r/arm_initialstate.c
@@ -75,8 +75,10 @@ void up_initial_state(struct tcb_s *tcb)
 
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb, (void *)(g_idle_topstack -
-        CONFIG_IDLETHREAD_STACKSIZE), CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = (void *)(g_idle_topstack -
+                                      CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->adj_stack_ptr   = (void *)g_idle_topstack;
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   /* Initialize the initial exception register context structure */
diff --git a/arch/arm/src/armv8-m/arm_initialstate.c b/arch/arm/src/armv8-m/arm_initialstate.c
index 459303990e..a34c853c4d 100644
--- a/arch/arm/src/armv8-m/arm_initialstate.c
+++ b/arch/arm/src/armv8-m/arm_initialstate.c
@@ -63,8 +63,10 @@ void up_initial_state(struct tcb_s *tcb)
 
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb, (void *)(g_idle_topstack -
-        CONFIG_IDLETHREAD_STACKSIZE), CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = (void *)(g_idle_topstack -
+                                      CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->adj_stack_ptr   = (void *)g_idle_topstack;
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   /* Initialize the initial exception register context structure */
diff --git a/arch/avr/src/avr/up_initialstate.c b/arch/avr/src/avr/up_initialstate.c
index 9f97513880..d88f7c0c12 100644
--- a/arch/avr/src/avr/up_initialstate.c
+++ b/arch/avr/src/avr/up_initialstate.c
@@ -75,8 +75,10 @@ void up_initial_state(struct tcb_s *tcb)
 
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb, (void *)(g_idle_topstack -
-        CONFIG_IDLETHREAD_STACKSIZE), CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = (void *)(g_idle_topstack -
+                                      CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->adj_stack_ptr   = (void *)g_idle_topstack;
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   /* Initialize the initial exception register context structure.  Zeroing
diff --git a/arch/avr/src/avr32/up_initialstate.c b/arch/avr/src/avr32/up_initialstate.c
index 4383a2f11f..26c60779ee 100644
--- a/arch/avr/src/avr32/up_initialstate.c
+++ b/arch/avr/src/avr32/up_initialstate.c
@@ -73,8 +73,10 @@ void up_initial_state(struct tcb_s *tcb)
 
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb, (void *)(g_idle_topstack -
-        CONFIG_IDLETHREAD_STACKSIZE), CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = (void *)(g_idle_topstack -
+                                      CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->adj_stack_ptr   = (void *)g_idle_topstack;
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   /* Initialize the initial exception register context structure.  Zeroing
diff --git a/arch/hc/src/m9s12/m9s12_initialstate.c b/arch/hc/src/m9s12/m9s12_initialstate.c
index 4359cb46dd..f98bff3453 100644
--- a/arch/hc/src/m9s12/m9s12_initialstate.c
+++ b/arch/hc/src/m9s12/m9s12_initialstate.c
@@ -72,8 +72,10 @@ void up_initial_state(struct tcb_s *tcb)
 
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb, (void *)(g_idle_topstack -
-        CONFIG_IDLETHREAD_STACKSIZE), CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = (void *)(g_idle_topstack -
+                                      CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->adj_stack_ptr   = (void *)g_idle_topstack;
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   /* Initialize the initial exception register context structure */
@@ -98,14 +100,14 @@ void up_initial_state(struct tcb_s *tcb)
 
   /* Condition code register:
    *
-   *   Bit 0: C — Carry/Borrow status bit
-   *   Bit 1: V — Two’s complement overflow status bit
-   *   Bit 2: Z — Zero status bit
-   *   Bit 3: N — Negative status bit
-   *   Bit 4: I — Maskable interrupt control bit
-   *   Bit 5: H — Half-carry status bit
-   *   Bit 6: X — Non-maskable interrupt control bit
-   *   Bit 7: S — STOP instruction control bit
+   *   Bit 0: C Carry/Borrow status bit
+   *   Bit 1: V Two's complement overflow status bit
+   *   Bit 2: Z Zero status bit
+   *   Bit 3: N Negative status bit
+   *   Bit 4: I Maskable interrupt control bit
+   *   Bit 5: H Half-carry status bit
+   *   Bit 6: X Non-maskable interrupt control bit
+   *   Bit 7: S STOP instruction control bit
    */
 
 # ifdef CONFIG_SUPPRESS_INTERRUPTS
diff --git a/arch/mips/src/mips32/mips_initialstate.c b/arch/mips/src/mips32/mips_initialstate.c
index 9b02f5b94f..2fe0f2c294 100644
--- a/arch/mips/src/mips32/mips_initialstate.c
+++ b/arch/mips/src/mips32/mips_initialstate.c
@@ -77,8 +77,10 @@ void up_initial_state(struct tcb_s *tcb)
 
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb, (void *)(g_idle_topstack -
-        CONFIG_IDLETHREAD_STACKSIZE), CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = (void *)(g_idle_topstack -
+                                      CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->adj_stack_ptr   = (void *)g_idle_topstack;
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   /* Initialize the initial exception register context structure */
diff --git a/arch/misoc/src/lm32/lm32_initialstate.c b/arch/misoc/src/lm32/lm32_initialstate.c
index 9a9c000a14..180ca8b6e3 100644
--- a/arch/misoc/src/lm32/lm32_initialstate.c
+++ b/arch/misoc/src/lm32/lm32_initialstate.c
@@ -75,8 +75,10 @@ void up_initial_state(struct tcb_s *tcb)
 
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb, (void *)(g_idle_topstack -
-        CONFIG_IDLETHREAD_STACKSIZE), CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = (void *)(g_idle_topstack -
+                                      CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->adj_stack_ptr   = (void *)g_idle_topstack;
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   /* Initialize the initial exception register context structure */
diff --git a/arch/misoc/src/minerva/minerva_initialstate.c b/arch/misoc/src/minerva/minerva_initialstate.c
index bcc0621f77..59d08c66e9 100644
--- a/arch/misoc/src/minerva/minerva_initialstate.c
+++ b/arch/misoc/src/minerva/minerva_initialstate.c
@@ -79,8 +79,10 @@ void up_initial_state(struct tcb_s *tcb)
 
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb, (void *)(g_idle_topstack -
-        CONFIG_IDLETHREAD_STACKSIZE), CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = (void *)(g_idle_topstack -
+                                      CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->adj_stack_ptr   = (void *)g_idle_topstack;
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   /* Initialize the initial exception register context structure */
diff --git a/arch/or1k/src/common/up_initialstate.c b/arch/or1k/src/common/up_initialstate.c
index 667a7cf4f5..25ad787646 100644
--- a/arch/or1k/src/common/up_initialstate.c
+++ b/arch/or1k/src/common/up_initialstate.c
@@ -77,8 +77,10 @@ void up_initial_state(struct tcb_s *tcb)
 
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb, (void *)(g_idle_topstack -
-        CONFIG_IDLETHREAD_STACKSIZE), CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = (void *)(g_idle_topstack -
+                                      CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->adj_stack_ptr   = (void *)g_idle_topstack;
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   /* Initialize the initial exception register context structure */
diff --git a/arch/renesas/src/m16c/m16c_initialstate.c b/arch/renesas/src/m16c/m16c_initialstate.c
index f77d61894d..4f651b727c 100644
--- a/arch/renesas/src/m16c/m16c_initialstate.c
+++ b/arch/renesas/src/m16c/m16c_initialstate.c
@@ -74,8 +74,10 @@ void up_initial_state(FAR struct tcb_s *tcb)
 
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb, (FAR void *)(g_idle_topstack -
-        CONFIG_IDLETHREAD_STACKSIZE), CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = (void *)(g_idle_topstack -
+                                      CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->adj_stack_ptr   = (void *)g_idle_topstack;
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   /* Initialize the initial exception register context structure */
diff --git a/arch/renesas/src/rx65n/rx65n_initialstate.c b/arch/renesas/src/rx65n/rx65n_initialstate.c
index 6bb18cd267..e371367289 100644
--- a/arch/renesas/src/rx65n/rx65n_initialstate.c
+++ b/arch/renesas/src/rx65n/rx65n_initialstate.c
@@ -65,8 +65,10 @@ void up_initial_state(struct tcb_s *tcb)
 
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb, (void *)(g_idle_topstack -
-        CONFIG_IDLETHREAD_STACKSIZE), CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = (void *)(g_idle_topstack -
+                                      CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->adj_stack_ptr   = (void *)g_idle_topstack;
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   /* Initialize the initial exception register context structure */
diff --git a/arch/renesas/src/sh1/sh1_initialstate.c b/arch/renesas/src/sh1/sh1_initialstate.c
index 045a9975c8..d43b71d004 100644
--- a/arch/renesas/src/sh1/sh1_initialstate.c
+++ b/arch/renesas/src/sh1/sh1_initialstate.c
@@ -92,8 +92,10 @@ void up_initial_state(struct tcb_s *tcb)
 
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb, (void *)(g_idle_topstack -
-        CONFIG_IDLETHREAD_STACKSIZE), CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = (void *)(g_idle_topstack -
+                                      CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->adj_stack_ptr   = (void *)g_idle_topstack;
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   /* Initialize the initial exception register context structure */
diff --git a/arch/risc-v/src/rv32im/riscv_initialstate.c b/arch/risc-v/src/rv32im/riscv_initialstate.c
index 0aad94dafb..8c59d638a9 100644
--- a/arch/risc-v/src/rv32im/riscv_initialstate.c
+++ b/arch/risc-v/src/rv32im/riscv_initialstate.c
@@ -76,8 +76,10 @@ void up_initial_state(struct tcb_s *tcb)
 
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb, (void *)(g_idle_topstack -
-        CONFIG_IDLETHREAD_STACKSIZE), CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = (void *)(g_idle_topstack -
+                                      CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->adj_stack_ptr   = (void *)g_idle_topstack;
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   /* Initialize the initial exception register context structure */
diff --git a/arch/risc-v/src/rv64gc/riscv_initialstate.c b/arch/risc-v/src/rv64gc/riscv_initialstate.c
index b0ebd1d7db..2fd491320a 100644
--- a/arch/risc-v/src/rv64gc/riscv_initialstate.c
+++ b/arch/risc-v/src/rv64gc/riscv_initialstate.c
@@ -76,8 +76,10 @@ void up_initial_state(struct tcb_s *tcb)
 
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb, (void *)(g_idle_topstack -
-        CONFIG_IDLETHREAD_STACKSIZE), CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = (void *)(g_idle_topstack -
+                                      CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->adj_stack_ptr   = (void *)g_idle_topstack;
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   /* Initialize the initial exception register context structure */
diff --git a/arch/sim/src/sim/up_initialstate.c b/arch/sim/src/sim/up_initialstate.c
index 03e5a35a03..860cac85f2 100644
--- a/arch/sim/src/sim/up_initialstate.c
+++ b/arch/sim/src/sim/up_initialstate.c
@@ -68,8 +68,10 @@ void up_initial_state(struct tcb_s *tcb)
 {
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb, (void *)(sim_getsp() -
-        CONFIG_IDLETHREAD_STACKSIZE), CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = (void *)(sim_getsp() -
+                                      CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->adj_stack_ptr   = (void *)sim_getsp();
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   memset(&tcb->xcp, 0, sizeof(struct xcptcontext));
diff --git a/arch/x86/src/i486/up_initialstate.c b/arch/x86/src/i486/up_initialstate.c
index 2a788098d0..c0f495c8e8 100644
--- a/arch/x86/src/i486/up_initialstate.c
+++ b/arch/x86/src/i486/up_initialstate.c
@@ -73,8 +73,10 @@ void up_initial_state(struct tcb_s *tcb)
 
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb, (void *)(g_idle_topstack -
-        CONFIG_IDLETHREAD_STACKSIZE), CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = (void *)(g_idle_topstack -
+                                      CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->adj_stack_ptr   = (void *)g_idle_topstack;
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   /* Initialize the initial exception register context structure */
diff --git a/arch/x86_64/src/intel64/up_initialstate.c b/arch/x86_64/src/intel64/up_initialstate.c
index caa7de3c96..ce1af4bb16 100644
--- a/arch/x86_64/src/intel64/up_initialstate.c
+++ b/arch/x86_64/src/intel64/up_initialstate.c
@@ -62,8 +62,10 @@ void up_initial_state(struct tcb_s *tcb)
 
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb, (void *)(g_idle_topstack -
-        CONFIG_IDLETHREAD_STACKSIZE), CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = (void *)(g_idle_topstack -
+                                      CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->adj_stack_ptr   = (void *)g_idle_topstack;
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   /* Initialize the initial exception register context structure */
diff --git a/arch/xtensa/src/common/xtensa_initialstate.c b/arch/xtensa/src/common/xtensa_initialstate.c
index a6cc3c7720..41b987f46a 100644
--- a/arch/xtensa/src/common/xtensa_initialstate.c
+++ b/arch/xtensa/src/common/xtensa_initialstate.c
@@ -77,7 +77,10 @@ void up_initial_state(struct tcb_s *tcb)
 
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb, g_idlestack, IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = g_idlestack;
+      tcb->adj_stack_ptr   = (char *)g_idlestack +
+                             CONFIG_IDLETHREAD_STACKSIZE;
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   /* Initialize the initial exception register context structure */
diff --git a/arch/z80/src/z180/z180_initialstate.c b/arch/z80/src/z180/z180_initialstate.c
index fb883fb3d7..43f4c5281e 100644
--- a/arch/z80/src/z180/z180_initialstate.c
+++ b/arch/z80/src/z180/z180_initialstate.c
@@ -57,8 +57,10 @@ void up_initial_state(struct tcb_s *tcb)
 
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb,
-        (void *)CONFIG_STACK_BASE, CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = (void *)CONFIG_STACK_BASE;
+      tcb->adj_stack_ptr   = (void *)(CONFIG_STACK_BASE +
+                                      CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   /* Initialize the initial exception register context structure */
diff --git a/arch/z80/src/z80/z80_initialstate.c b/arch/z80/src/z80/z80_initialstate.c
index a068a3977b..05c2df3207 100644
--- a/arch/z80/src/z80/z80_initialstate.c
+++ b/arch/z80/src/z80/z80_initialstate.c
@@ -57,8 +57,10 @@ void up_initial_state(struct tcb_s *tcb)
 
   if (tcb->pid == 0)
     {
-      up_use_stack(tcb,
-        (void *)CONFIG_STACK_BASE, CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->stack_alloc_ptr = (void *)CONFIG_STACK_BASE;
+      tcb->adj_stack_ptr   = (void *)(CONFIG_STACK_BASE +
+                                      CONFIG_IDLETHREAD_STACKSIZE);
+      tcb->adj_stack_size  = CONFIG_IDLETHREAD_STACKSIZE;
     }
 
   /* Initialize the initial exception register context structure */