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authorRaul E Rangel <rrangel@chromium.org>2018-06-25 14:22:27 -0600
committerMartin Roth <martinroth@google.com>2018-06-27 22:12:28 +0000
commite18e5ab5fa5002f5835a2b83be0fcd6c5739cd8a (patch)
tree7b0064fc8abc7af967cf3a1db19e20d77629efdf
parent871156898c874c5247d4024309af348f8bc1e518 (diff)
downloadcoreboot-e18e5ab5fa5002f5835a2b83be0fcd6c5739cd8a.tar.xz
smm: Switch from %edx to %ebx
%edx gets clobbered before the c handler is invoked. This is just a cleanup cl to make the next cl look clean. BUG=b:80539294 TEST=verified SMI still works on grunt. Change-Id: I21bf41ed4fdeaaa8737c883f202a39cb57c2b517 Signed-off-by: Raul E Rangel <rrangel@chromium.org> Reviewed-on: https://review.coreboot.org/27228 Reviewed-by: Martin Roth <martinroth@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
-rw-r--r--src/cpu/x86/smm/smm_stub.S6
1 files changed, 3 insertions, 3 deletions
diff --git a/src/cpu/x86/smm/smm_stub.S b/src/cpu/x86/smm/smm_stub.S
index 0c05032577..ba66db9179 100644
--- a/src/cpu/x86/smm/smm_stub.S
+++ b/src/cpu/x86/smm/smm_stub.S
@@ -132,9 +132,9 @@ smm_trampoline32:
1:
movl stack_size, %eax
mul %ecx /* %eax(stack_size) * %ecx(cpu) = %eax(offset) */
- movl stack_top, %edx
- subl %eax, %edx /* global_stack_top - offset = stack_top */
- mov %edx, %esp
+ movl stack_top, %ebx
+ subl %eax, %ebx /* global_stack_top - offset = stack_top */
+ mov %ebx, %esp
/* Create stack frame by pushing a NULL stack base pointer */
pushl $0x0