Use CPUID Leaf 01 to detect support for debug extensions. Force use of
software breakpoints if debug extensions are not supported.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off by: Michael Kinney
<michael.d.kin...@intel.com<mailto:michael.d.kin...@intel.com>>
Index: Library/PeCoffExtraActionLibDebug/PeCoffExtraActionLib.c
===================================================================
--- Library/PeCoffExtraActionLibDebug/PeCoffExtraActionLib.c (revision
17201)
+++ Library/PeCoffExtraActionLibDebug/PeCoffExtraActionLib.c (working copy)
@@ -1,7 +1,7 @@
/** @file
PE/Coff Extra Action library instances.
- Copyright (c) 2010 - 2013, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2010 - 2015, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD
License
which accompanies this distribution. The full text of the license may be
found at
@@ -65,6 +65,7 @@
IA32_DESCRIPTOR IdtDescriptor;
IA32_IDT_GATE_DESCRIPTOR OriginalIdtEntry;
BOOLEAN IdtEntryHooked;
+ UINT32 RegEdx;
ASSERT (ImageContext != NULL);
@@ -79,6 +80,16 @@
IdtEntryHooked = FALSE;
LoadImageMethod = PcdGet8 (PcdDebugLoadImageMethod);
+ if (LoadImageMethod == DEBUG_LOAD_IMAGE_METHOD_IO_HW_BREAKPOINT) {
+ //
+ // If the CPU does not support Debug Extensions(CPUID:01 EDX:BIT2)
+ // then force use of DEBUG_LOAD_IMAGE_METHOD_SOFT_INT3
+ //
+ AsmCpuid (1, NULL, NULL, NULL, &RegEdx);
+ if ((RegEdx & BIT2) == 0) {
+ LoadImageMethod = DEBUG_LOAD_IMAGE_METHOD_SOFT_INT3;
+ }
+ }
AsmReadIdtr (&IdtDescriptor);
if (LoadImageMethod == DEBUG_LOAD_IMAGE_METHOD_SOFT_INT3) {
if (!CheckDebugAgentHandler (&IdtDescriptor, SOFT_INT_VECTOR_NUM)) {
Index: Library/PeCoffExtraActionLibDebug/PeCoffExtraActionLibDebug.inf
===================================================================
--- Library/PeCoffExtraActionLibDebug/PeCoffExtraActionLibDebug.inf
(revision 17201)
+++ Library/PeCoffExtraActionLibDebug/PeCoffExtraActionLibDebug.inf (working
copy)
@@ -1,7 +1,7 @@
## @file
# PeCoffExtraAction Library to support source level debug.
#
-# Copyright (c) 2010 - 2014, Intel Corporation. All rights reserved.<BR>
+# Copyright (c) 2010 - 2015, Intel Corporation. All rights reserved.<BR>
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD
License
@@ -19,7 +19,7 @@
MODULE_UNI_FILE = PeCoffExtraActionLib.uni
FILE_GUID = 8F01CBD5-E069-44d7-90C9-35F0318603AD
MODULE_TYPE = BASE
- VERSION_STRING = 0.7
+ VERSION_STRING = 0.8
LIBRARY_CLASS = PeCoffExtraActionLib
#
------------------------------------------------------------------------------
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