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diff --git a/src/arch/alpha/aout_machdep.h b/src/arch/alpha/aout_machdep.h
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+/*
+ * Copyright (c) 2003-2005 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __AOUT_MACHDEP_H__
+#define __AOUT_MACHDEP_H__
+
+///
+/// Funky Alpha 64-bit a.out header used for PAL code.
+///
+struct aout_exechdr {
+    uint16_t	magic;		///< magic number
+    uint16_t	vstamp;		///< version stamp?
+    uint16_t	bldrev;		///< ???
+    uint16_t	padcell;	///< padding
+    uint64_t	tsize;		///< text segment size
+    uint64_t	dsize;		///< data segment size
+    uint64_t	bsize;		///< bss segment size
+    uint64_t	entry;		///< entry point
+    uint64_t	text_start;	///< text base address
+    uint64_t	data_start;	///< data base address
+    uint64_t	bss_start;	///< bss base address
+    uint32_t	gprmask;	///< GPR mask (unused, AFAIK)
+    uint32_t	fprmask;	///< FPR mask (unused, AFAIK)
+    uint64_t	gp_value;	///< global pointer reg value
+};
+
+#define AOUT_LDPGSZ	8192
+
+#define N_GETMAGIC(ex)	((ex).magic)
+
+#define N_BADMAX
+
+#define N_TXTADDR(ex)	((ex).text_start)
+#define N_DATADDR(ex)	((ex).data_start)
+#define N_BSSADDR(ex)	((ex).bss_start)
+
+#define N_TXTOFF(ex)	\
+        (N_GETMAGIC(ex) == ZMAGIC ? 0 : sizeof(struct aout_exechdr))
+
+#define N_DATOFF(ex)	N_ALIGN(ex, N_TXTOFF(ex) + (ex).tsize)
+
+#endif /* !__AOUT_MACHDEP_H__*/