new file mode 100644
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+++ b/packages/hal/arm/arch/current/include/arm_stub.h
@@ -0,0 +1,74 @@
+#ifndef CYGONCE_HAL_ARM_STUB_H
+#define CYGONCE_HAL_ARM_STUB_H
+
+/* arm_stub.h - ARM-specific definitions for generic stub
+ * 
+ * Copyright (c) 1998,1999 Cygnus Solutions
+ *
+ * The authors hereby grant permission to use, copy, modify, distribute,
+ * and license this software and its documentation for any purpose, provided
+ * that existing copyright notices are retained in all copies and that this
+ * notice is included verbatim in any distributions. No written agreement,
+ * license, or royalty fee is required for any of the authorized uses.
+ * Modifications to this software may be copyrighted by their authors
+ * and need not follow the licensing terms described here, provided that
+ * the new terms are clearly indicated on the first page of each file where
+ * they apply.
+ */
+
+#define NUMREGS    (16+8+2)  // 16 GPR, 8 FPR (unused), 2 PS
+
+#define REGSIZE( _x_ ) (((_x_) < F0 || (_x_) >= FPS) ? 4 : 12)
+
+typedef unsigned long target_register_t;
+
+enum regnames {
+    R0, R1, R2, R3, R4, R5, R6, R7, 
+    R8, R9, R10, FP, IP, SP, LR, PC,
+    F0, F1, F2, F3, F4, F5, F6, F7, 
+    FPS, PS
+};
+
+#define PS_N 0x80000000
+#define PS_Z 0x40000000
+#define PS_C 0x20000000
+#define PS_V 0x10000000
+
+typedef enum regnames regnames_t;
+
+/* Given a trap value TRAP, return the corresponding signal. */
+extern int __computeSignal (unsigned int trap_number);
+
+/* Return the SPARC trap number corresponding to the last-taken trap. */
+extern int __get_trap_number (void);
+
+/* Return the currently-saved value corresponding to register REG. */
+extern target_register_t get_register (regnames_t reg);
+
+/* Store VALUE in the register corresponding to WHICH. */
+extern void put_register (regnames_t which, target_register_t value);
+
+/* Set the currently-saved pc register value to PC. This also updates NPC
+   as needed. */
+extern void set_pc (target_register_t pc);
+
+/* Set things up so that the next user resume will execute one instruction.
+   This may be done by setting breakpoints or setting a single step flag
+   in the saved user registers, for example. */
+void __single_step (void);
+
+/* Clear the single-step state. */
+void __clear_single_step (void);
+
+/* If the breakpoint we hit is in the breakpoint() instruction, return a
+   non-zero value. */
+extern int __is_breakpoint_function (void);
+
+/* Skip the current instruction. */
+extern void __skipinst (void);
+
+extern void __install_breakpoints (void);
+
+extern void __clear_breakpoints (void);
+
+#endif // ifndef CYGONCE_HAL_ARM_STUB_H