Changes in kernel/generic/src/proc/program.c [6eef3c4:d1e8440] in mainline

File:

• kernel/generic/src/proc/program.c (modified) (2 diffs)

kernel/generic/src/proc/program.c

@@ -79 +79 @@
          * Create the stack address space area.
          */
-        uintptr_t virt = USTACK_ADDRESS;
+        uintptr_t virt = (uintptr_t) -1;
+        uintptr_t bound = USER_ADDRESS_SPACE_END - (STACK_SIZE_USER - 1);
+
+        /* Adjust bound to create space for the desired guard page. */
+        bound -= PAGE_SIZE;
+
         as_area_t *area = as_area_create(as,
-            AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE,
-            STACK_SIZE, AS_AREA_ATTR_NONE, &anon_backend, NULL, &virt, 0);
+            AS_AREA_READ | AS_AREA_WRITE | AS_AREA_CACHEABLE | AS_AREA_GUARD |
+            AS_AREA_LATE_RESERVE, STACK_SIZE_USER, AS_AREA_ATTR_NONE,
+            &anon_backend, NULL, &virt, bound);
         if (!area) {
                 task_destroy(prg->task);
@@ -93 +99 @@
         kernel_uarg->uspace_entry = (void *) entry_addr;
         kernel_uarg->uspace_stack = (void *) virt;
-        kernel_uarg->uspace_stack_size = STACK_SIZE;
+        kernel_uarg->uspace_stack_size = STACK_SIZE_USER;
         kernel_uarg->uspace_thread_function = NULL;
         kernel_uarg->uspace_thread_arg = NULL;