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Unified Diff: runtime/vm/constants_ia32.h

Issue 14812005: Cleanup deoptimization code to make it architecture independent (in progress). (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/
Patch Set: Created 7 years, 8 months ago
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Index: runtime/vm/constants_ia32.h
===================================================================
--- runtime/vm/constants_ia32.h (revision 22382)
+++ runtime/vm/constants_ia32.h (working copy)
@@ -75,11 +75,29 @@
const Register kStackTraceObjectReg = EDX;
+// TODO(regis): Move these constants to stack_frame_ia32.h.
// Dart stack frame layout.
-static const int kLastParamSlotIndex = 2;
-static const int kFirstLocalSlotIndex = -2;
+static const int kLastParamSlotIndex = 2; // From fp.
+static const int kFirstLocalSlotIndex = -2; // From fp.
+static const int kPcSlotIndexFromSp = -1;
+/* IA32 Dart Frame Layout
+ | | <- TOS
+Callee frame | ... |
+ | current ret addr | (PC of current frame)
+ +-------------------+
+Current frame | ... | <- ESP of current frame
+ | first local |
+ | PC Marker | (current frame's code entry)
+ | caller's EBP | <- EBP of current frame
+ | caller's ret addr | (PC of caller frame)
+ +-------------------+
+Caller frame | last parameter |
+ | ... |
+*/
+
+
enum ScaleFactor {
TIMES_1 = 0,
TIMES_2 = 1,
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