Changeset c8cd9a8 in mainline for kernel/arch/ia32/src/proc/scheduler.c

Timestamp:

2010-07-14T12:29:35Z (15 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

864e272

Parents:

a7220de

Message:

Preallocate space for the istate structure on the stack for the use by the
SYSENTER instruction.

File:

• kernel/arch/ia32/src/proc/scheduler.c (modified) (2 diffs)

kernel/arch/ia32/src/proc/scheduler.c

@@ -39 +39 @@
 #include <arch.h>
 #include <arch/context.h>  /* SP_DELTA */
+#include <arch/interrupt.h>
 #include <arch/pm.h>
 #include <arch/asm.h>
@@ -63 +64 @@
         if (CPU->arch.fi.bits.sep) {
                 /* Set kernel stack for CP3 -> CPL0 switch via SYSENTER */
-                write_msr(IA32_MSR_SYSENTER_ESP, kstk);
+                write_msr(IA32_MSR_SYSENTER_ESP, kstk - sizeof(istate_t));
         }