#if !defined(__DYNGEN_EXEC_H__)
#define __DYNGEN_EXEC_H__
-#if defined(__i386__)
+#if defined(CONFIG_TCG_INTERPRETER)
+/* The TCG interpreter does not need a special register AREG0,
+ * but it is possible to use one by defining AREG0.
+ * On i386, register edi seems to work. */
+/* Run without special register AREG0 or use a value defined elsewhere. */
+#elif defined(__i386__)
#define AREG0 "ebp"
#elif defined(__x86_64__)
#define AREG0 "r14"
#elif defined(_ARCH_PPC)
#define AREG0 "r27"
#elif defined(__arm__)
-#define AREG0 "r7"
+#define AREG0 "r6"
#elif defined(__hppa__)
#define AREG0 "r17"
#elif defined(__mips__)
#error unsupported CPU
#endif
+#if defined(AREG0)
register CPUState *env asm(AREG0);
+#else
+/* TODO: Try env = cpu_single_env. */
+extern CPUState *env;
+#endif
#endif /* !defined(__DYNGEN_EXEC_H__) */