3 files changed, 47 insertions, 0 deletions
diff --git a/src/ARMeilleure/CodeGen/Unwinding/UnwindInfo.cs b/src/ARMeilleure/CodeGen/Unwinding/UnwindInfo.cs
new file mode 100644
index 00000000..3d0bc21d
--- /dev/null
+++ b/src/ARMeilleure/CodeGen/Unwinding/UnwindInfo.cs
@@ -0,0 +1,16 @@
+namespace ARMeilleure.CodeGen.Unwinding
+{
+    struct UnwindInfo
+    {
+        public const int Stride = 4; // Bytes.
+
+        public UnwindPushEntry[] PushEntries { get; }
+        public int PrologSize { get; }
+
+        public UnwindInfo(UnwindPushEntry[] pushEntries, int prologSize)
+        {
+            PushEntries = pushEntries;
+            PrologSize = prologSize;
+        }
+    }
+}
+\ No newline at end of file
diff --git a/src/ARMeilleure/CodeGen/Unwinding/UnwindPseudoOp.cs b/src/ARMeilleure/CodeGen/Unwinding/UnwindPseudoOp.cs
new file mode 100644
index 00000000..4a8288a2
--- /dev/null
+++ b/src/ARMeilleure/CodeGen/Unwinding/UnwindPseudoOp.cs
@@ -0,0 +1,11 @@
+namespace ARMeilleure.CodeGen.Unwinding
+{
+    enum UnwindPseudoOp
+    {
+        PushReg    = 0,
+        SetFrame   = 1,
+        AllocStack = 2,
+        SaveReg    = 3,
+        SaveXmm128 = 4
+    }
+}
+\ No newline at end of file
diff --git a/src/ARMeilleure/CodeGen/Unwinding/UnwindPushEntry.cs b/src/ARMeilleure/CodeGen/Unwinding/UnwindPushEntry.cs
new file mode 100644
index 00000000..fd8ea402
--- /dev/null
+++ b/src/ARMeilleure/CodeGen/Unwinding/UnwindPushEntry.cs
@@ -0,0 +1,20 @@
+namespace ARMeilleure.CodeGen.Unwinding
+{
+    struct UnwindPushEntry
+    {
+        public const int Stride = 16; // Bytes.
+
+        public UnwindPseudoOp PseudoOp { get; }
+        public int PrologOffset { get; }
+        public int RegIndex { get; }
+        public int StackOffsetOrAllocSize { get; }
+
+        public UnwindPushEntry(UnwindPseudoOp pseudoOp, int prologOffset, int regIndex = -1, int stackOffsetOrAllocSize = -1)
+        {
+            PseudoOp = pseudoOp;
+            PrologOffset = prologOffset;
+            RegIndex = regIndex;
+            StackOffsetOrAllocSize = stackOffsetOrAllocSize;
+        }
+    }
+}
+\ No newline at end of file