Changeset ee454eb in mainline for kernel/arch/sparc64/src/proc/thread.c

Timestamp:

2006-08-30T15:50:29Z (18 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

beb3926a

Parents:

e11ae91

Message:

sparc64 work.
More bits needed to reach the userspace milestone were added.
The preemptible_handler(), still a prototype, now contains all functionality it needs.
Some sanitation was added to functions expecting page-aligned pointers to
userspace window buffer.

File:

• kernel/arch/sparc64/src/proc/thread.c (modified) (3 diffs)

kernel/arch/sparc64/src/proc/thread.c

@@ -36 +36 @@
 #include <arch/proc/thread.h>
 #include <mm/frame.h>
+#include <mm/page.h>
+#include <arch/mm/page.h>
+#include <align.h>
 
 void thr_constructor_arch(thread_t *t)
@@ -47 +50 @@
 void thr_destructor_arch(thread_t *t)
 {
-        if (t->arch.uspace_window_buffer)
-                frame_free((uintptr_t) t->arch.uspace_window_buffer);
+        if (t->arch.uspace_window_buffer) {
+                /*
+                 * Mind the possible alignment of the userspace window buffer
+                 * belonging to a killed thread.
+                 */
+                frame_free(ALIGN_DOWN((uintptr_t) t->arch.uspace_window_buffer, PAGE_SIZE));
+        }
 }
 
@@ -59 +67 @@
                  */
                 t->arch.uspace_window_buffer = frame_alloc(ONE_FRAME, 0);
+        } else {
+                uintptr_t uw_buf = (uintptr_t) t->arch.uspace_window_buffer;
+
+                /*
+                 * Mind the possible alignment of the userspace window buffer
+                 * belonging to a killed thread.
+                 */
+                 t->arch.uspace_window_buffer = (uint8_t *) ALIGN_DOWN(uw_buf, PAGE_SIZE);
         }
 }