Changeset 2f23341 in mainline for kernel/arch/ia64/src/proc/scheduler.c

Timestamp:

2011-05-19T20:04:09Z (13 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

326bf65

Parents:

2a922c8

Message:

Fix ia64 regression introduced in mainline,966.
The ia64 stack is actually two stacks in one:

• the regular memory stack, which is now STACK_SIZE / 2 bytes long
• and the equally sized RSE stack

Note that ia64 is now the only architecture which effectively uses
only one memory frame for its memory stack.

File:

• kernel/arch/ia64/src/proc/scheduler.c (modified) (2 diffs)

kernel/arch/ia64/src/proc/scheduler.c

@@ -79 +79 @@
          * Record address of kernel stack to bank 0 r23.
          * These values will be found there after switch from userspace.
+         *
+         * Mind the 1:1 split of the entire STACK_SIZE long region between the
+         * memory stack and the RSE stack.
          */
         asm volatile (
@@ -86 +89 @@
                 "bsw.1\n"
                 :
-                : "r" (&THREAD->kstack[STACK_SIZE]),
-                  "r" (&THREAD->kstack[STACK_SIZE - SP_DELTA])
+                : "r" (&THREAD->kstack[STACK_SIZE / 2]),
+                  "r" (&THREAD->kstack[STACK_SIZE / 2 - SP_DELTA])
                 );
 }