1 files changed, 58 insertions, 0 deletions
diff --git a/nsprpub/pr/src/md/os2/os2gc.c b/nsprpub/pr/src/md/os2/os2gc.c
new file mode 100644
index 0000000000..79b6de5736
--- /dev/null
+++ b/nsprpub/pr/src/md/os2/os2gc.c
@@ -0,0 +1,58 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * GC related routines
+ *
+ */
+#include "primpl.h"
+
+PRWord *_MD_HomeGCRegisters(PRThread *t, int isCurrent, int *np)
+{
+    CONTEXTRECORD context;
+    context.ContextFlags = CONTEXT_INTEGER;
+
+    if (_PR_IS_NATIVE_THREAD(t)) {
+        context.ContextFlags |= CONTEXT_CONTROL;
+        if (QueryThreadContext(t->md.handle, CONTEXT_CONTROL, &context)) {
+            t->md.gcContext[0] = context.ctx_RegEax;
+            t->md.gcContext[1] = context.ctx_RegEbx;
+            t->md.gcContext[2] = context.ctx_RegEcx;
+            t->md.gcContext[3] = context.ctx_RegEdx;
+            t->md.gcContext[4] = context.ctx_RegEsi;
+            t->md.gcContext[5] = context.ctx_RegEdi;
+            t->md.gcContext[6] = context.ctx_RegEsp;
+            t->md.gcContext[7] = context.ctx_RegEbp;
+            *np = PR_NUM_GCREGS;
+        } else {
+            PR_ASSERT(0);/* XXX */
+        }
+    }
+    return (PRWord *)&t->md.gcContext;
+}
+
+/* This function is not used right now, but is left as a reference.
+ * If you ever need to get the fiberID from the currently running fiber,
+ * this is it.
+ */
+void *
+GetMyFiberID()
+{
+    void *fiberData = 0;
+
+    /* A pointer to our tib entry is found at FS:[18]
+     * At offset 10h is the fiberData pointer.  The context of the
+     * fiber is stored in there.
+     */
+#ifdef HAVE_ASM
+    __asm {
+        mov    EDX, FS:[18h]
+        mov    EAX, DWORD PTR [EDX+10h]
+        mov    [fiberData], EAX
+    }
+#endif
+
+    return fiberData;
+}