UMM: Implement getter for address environment heap start vaddr

Using the Kconfig macro does not work for RISC-V target, as there the
user heap follows .data/.bss and does not obey any Kconfig provided
boundary.

Added stubs for ARM and Z80 also.

arch/arm/src/armv7-a/arm_addrenv.c

@@ -447,6 +447,33 @@ int up_addrenv_vdata(group_addrenv_t *addrenv, uintptr_t textsize,
   return OK;
 }
 
+/****************************************************************************
+ * Name: up_addrenv_vheap
+ *
+ * Description:
+ *   Return the heap virtual address associated with the newly created
+ *   address environment.  This function is used by the binary loaders in
+ *   order get an address that can be used to initialize the new task.
+ *
+ * Input Parameters:
+ *   addrenv - The representation of the task address environment previously
+ *      returned by up_addrenv_create.
+ *   vheap - The location to return the virtual address.
+ *
+ * Returned Value:
+ *   Zero (OK) on success; a negated errno value on failure.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_BUILD_KERNEL
+int up_addrenv_vheap(const group_addrenv_t *addrenv, void **vheap)
+{
+  DEBUGASSERT(addrenv && vheap);
+  *vheap = (void *)CONFIG_ARCH_HEAP_VBASE;
+  return OK;
+}
+#endif
+
 /****************************************************************************
  * Name: up_addrenv_heapsize
  *

arch/risc-v/src/common/riscv_addrenv.c

@@ -590,6 +590,33 @@ int up_addrenv_vdata(group_addrenv_t *addrenv, uintptr_t textsize,
   return OK;
 }
 
+/****************************************************************************
+ * Name: up_addrenv_vheap
+ *
+ * Description:
+ *   Return the heap virtual address associated with the newly created
+ *   address environment.  This function is used by the binary loaders in
+ *   order get an address that can be used to initialize the new task.
+ *
+ * Input Parameters:
+ *   addrenv - The representation of the task address environment previously
+ *      returned by up_addrenv_create.
+ *   vheap - The location to return the virtual address.
+ *
+ * Returned Value:
+ *   Zero (OK) on success; a negated errno value on failure.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_BUILD_KERNEL
+int up_addrenv_vheap(const group_addrenv_t *addrenv, void **vheap)
+{
+  DEBUGASSERT(addrenv && vheap);
+  *vheap = (void *)addrenv->heapvbase;
+  return OK;
+}
+#endif
+
 /****************************************************************************
  * Name: up_addrenv_heapsize
  *

arch/z80/src/z180/z180_mmu.c

@@ -375,6 +375,33 @@ int up_addrenv_vdata(FAR group_addrenv_t *addrenv, uintptr_t textsize,
   return CONFIG_Z180_COMMON1AREA_VIRTBASE + textsize;
 }
 
+/****************************************************************************
+ * Name: up_addrenv_vheap
+ *
+ * Description:
+ *   Return the heap virtual address associated with the newly created
+ *   address environment.  This function is used by the binary loaders in
+ *   order get an address that can be used to initialize the new task.
+ *
+ * Input Parameters:
+ *   addrenv - The representation of the task address environment previously
+ *      returned by up_addrenv_create.
+ *   vheap - The location to return the virtual address.
+ *
+ * Returned Value:
+ *   Zero (OK) on success; a negated errno value on failure.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_BUILD_KERNEL
+int up_addrenv_vheap(FAR const group_addrenv_t *addrenv, FAR void **vheap)
+{
+  /* Not implemented */
+
+  return -ENOSYS;
+}
+#endif
+
 /****************************************************************************
  * Name: up_addrenv_heapsize
  *

binfmt/binfmt_execmodule.c

@@ -118,6 +118,7 @@ int exec_module(FAR const struct binary_s *binp,
   FAR struct task_tcb_s *tcb;
 #if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_BUILD_KERNEL)
   save_addrenv_t oldenv;
+  FAR void *vheap;
 #endif
   pid_t pid;
   int ret;
@@ -173,8 +174,15 @@ int exec_module(FAR const struct binary_s *binp,
       goto errout_with_envp;
     }
 
-  binfo("Initialize the user heap (heapsize=%d)\n", binp->addrenv.heapsize);
+  ret = up_addrenv_vheap(&binp->addrenv, &vheap);
-  umm_initialize((FAR void *)CONFIG_ARCH_HEAP_VBASE, binp->addrenv.heapsize);
+  if (ret < 0)
+    {
+      berr("ERROR: up_addrenv_vheap() failed: %d\n", ret);
+      goto errout_with_addrenv;
+    }
+
+  binfo("Initialize the user heap (heapsize=%zu)\n", binp->addrenv.heapsize);
+  umm_initialize(vheap, up_addrenv_heapsize(&binp->addrenv));
 #endif
 
   /* Note that tcb->flags are not modified.  0=normal task */

include/nuttx/addrenv.h

@@ -283,6 +283,8 @@ struct addrenv_reserve_s
  *                         address environment
  *   up_addrenv_vdata    - Returns the virtual base address of the .bss/.data
  *                         address environment
+ *   up_addrenv_vheap    - Returns the virtual base address of the heap
+ *                         address environment
  *   up_addrenv_heapsize - Returns the size of the initial heap allocation.
  *   up_addrenv_select   - Instantiate an address environment
  *   up_addrenv_restore  - Restore an address environment

include/nuttx/arch.h

@@ -831,6 +831,8 @@ void up_textheap_free(FAR void *p);
  *                         address environment
  *   up_addrenv_vdata    - Returns the virtual base address of the .bss/.data
  *                         address environment
+ *   up_addrenv_vheap    - Returns the virtual base address of the heap
+ *                         address environment
  *   up_addrenv_heapsize - Returns the size of the initial heap allocation.
  *   up_addrenv_select   - Instantiate an address environment
  *   up_addrenv_restore  - Restore an address environment
@@ -992,6 +994,28 @@ int up_addrenv_vdata(FAR group_addrenv_t *addrenv, uintptr_t textsize,
                      FAR void **vdata);
 #endif
 
+/****************************************************************************
+ * Name: up_addrenv_vheap
+ *
+ * Description:
+ *   Return the heap virtual address associated with the newly created
+ *   address environment.  This function is used by the binary loaders in
+ *   order get an address that can be used to initialize the new task.
+ *
+ * Input Parameters:
+ *   addrenv - The representation of the task address environment previously
+ *      returned by up_addrenv_create.
+ *   vheap - The location to return the virtual address.
+ *
+ * Returned Value:
+ *   Zero (OK) on success; a negated errno value on failure.
+ *
+ ****************************************************************************/
+
+#if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_BUILD_KERNEL)
+int up_addrenv_vheap(FAR const group_addrenv_t *addrenv, FAR void **vheap);
+#endif
+
 /****************************************************************************
  * Name: up_addrenv_heapsize
  *