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authorKyösti Mälkki <kyosti.malkki@gmail.com>2014-10-16 12:47:25 +0300
committerKyösti Mälkki <kyosti.malkki@gmail.com>2014-10-19 06:14:05 +0200
commit1729cd85744129104e3e41aac1f18e43b62f79ff (patch)
tree37a9e44516fc1d1da23e75266aa672099a2872f2 /src/cpu/intel/car
parentd05d0db0d0cb76776addbd75d264e713dda47880 (diff)
downloadcoreboot-1729cd85744129104e3e41aac1f18e43b62f79ff.tar.xz
x86 romstage: Move stack just below RAMTOP
Placement of romstage stack in RAM was vulnerable for getting corrupted by decompressed ramstage. Change-Id: Ic032bd3e69f4ab8dab8e5932df39fab70aa3e769 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: http://review.coreboot.org/7096 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@google.com>
Diffstat (limited to 'src/cpu/intel/car')
-rw-r--r--src/cpu/intel/car/cache_as_ram.inc3
-rw-r--r--src/cpu/intel/car/cache_as_ram_ht.inc3
2 files changed, 2 insertions, 4 deletions
diff --git a/src/cpu/intel/car/cache_as_ram.inc b/src/cpu/intel/car/cache_as_ram.inc
index 1ea50b8b37..843ca2dfd8 100644
--- a/src/cpu/intel/car/cache_as_ram.inc
+++ b/src/cpu/intel/car/cache_as_ram.inc
@@ -21,7 +21,6 @@
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include <cpu/x86/stack.h>
#include <cpu/x86/mtrr.h>
#include <cpu/x86/cache.h>
#include <cpu/x86/lapic_def.h>
@@ -361,7 +360,7 @@ __main:
post_code(POST_PREPARE_RAMSTAGE)
cld /* Clear direction flag. */
- movl $ROMSTAGE_STACK, %esp
+ movl $CONFIG_RAMTOP, %esp
movl %esp, %ebp
call copy_and_run
diff --git a/src/cpu/intel/car/cache_as_ram_ht.inc b/src/cpu/intel/car/cache_as_ram_ht.inc
index fb653168b2..265cd4f247 100644
--- a/src/cpu/intel/car/cache_as_ram_ht.inc
+++ b/src/cpu/intel/car/cache_as_ram_ht.inc
@@ -20,7 +20,6 @@
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#include <cpu/x86/stack.h>
#include <cpu/x86/mtrr.h>
#include <cpu/x86/cache.h>
#include <cpu/x86/post_code.h>
@@ -430,7 +429,7 @@ __main:
post_code(POST_PREPARE_RAMSTAGE)
cld /* Clear direction flag. */
- movl $ROMSTAGE_STACK, %esp
+ movl $CONFIG_RAMTOP, %esp
movl %esp, %ebp
call copy_and_run