X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=src%2Fvm%2Fjit%2Fpowerpc%2Fpatcher.c;h=0dc24cadd927788661a136b216916118a60a106c;hb=167cdb4568b39860841183e6886bfc2bb0c28887;hp=051a186e616fe6fc582bdfbd10d73ceb48dee222;hpb=cd82025560ebc4082b4bdff1e23084aeedd6368e;p=cacao.git

diff --git a/src/vm/jit/powerpc/patcher.c b/src/vm/jit/powerpc/patcher.c
index 051a186e6..0dc24cadd 100644
--- a/src/vm/jit/powerpc/patcher.c
+++ b/src/vm/jit/powerpc/patcher.c
@@ -2,6 +2,7 @@
 
    Copyright (C) 1996-2005, 2006, 2007, 2008
    CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
+   Copyright (C) 2008 Theobroma Systems Ltd.
 
    This file is part of CACAO.
 
@@ -65,6 +66,22 @@ void patcher_patch_code(patchref_t *pr)
 }
 
 
+/**
+ * Check if the trap instruction at the given PC is valid.
+ *
+ * @param pc Program counter.
+ *
+ * @return true if valid, false otherwise.
+ */
+bool patcher_is_valid_trap_instruction_at(void* pc)
+{
+	uint32_t mcode = *((uint32_t*) pc);
+
+	// Check for the undefined instruction we use.
+	return (mcode == 0x00000000);
+}
+
+
 /* patcher_resolve_classref_to_classinfo ***************************************
 
    ACONST: