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--- dev:crosscompiler:backend_arm:exceptions [2018/11/02 17:30] – created ursgraf
+++ dev:crosscompiler:backend_arm:exceptions [2019/08/05 09:32] – [ARM Exceptions] ursgraf
@@ Line 2: / Line 2: @@
 ===== Terminology =====
   * ARM Exception: Exception which are specific to the ARM architecture.
-  * Interrupt: A certain type of a PPC exception, caused by asynchronous events by external hardware.
+  * Interrupt: A certain type of a ARM exception, caused by asynchronous events by external hardware.
   * Java Exception: Exception defined in the Java language specification. All Java exceptions are extensions of the class //Throwable//.
-[{{ .:javaexceptions.png?550&direct |//Types of Java-Exceptions// }}]
+[{{ :dev:crosscompiler:backend_ppc:javaexceptions.png?550&direct |//Types of Java-Exceptions// }}]
 ===== ARM Exceptions =====
+Each ARM exception is caused by a synchronous or asynchronous event and generally causes the processor to switch its state and jump to its proper exception vector.
+[{{ .:ppcexception.png?550&direct |//PPC Exceptions and Interrupts// }}]
+Exception classes and their corresponding exception methods have to be specified in the configuration. Instances of these classes are never created and therefore the object constructors are defined as //synthetic// and will not be translated into code.\\
+The code generator has to create a special exception stack frame.\\
+The ARM architecture reserves 4 bytes of memory at each exception vector. This is just enough to place a branching instruction there which causes the processor to jump to the right exception code.

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