--- /dev/null
+/*
+ NetBSD/arm (RiscBSD) version.
+ Copyright (C) 1993, 1994 Free Software Foundation, Inc.
+ Contributed by Mark Brinicombe (amb@physig.ph.kcl.ac.uk)
+
+This file is part of GNU CC.
+
+GNU CC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU CC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU CC; see the file COPYING. If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+/* Run-time Target Specification. */
+#define TARGET_VERSION fputs (" (ARM/NetBSD)", stderr);
+
+/* This is used in ASM_FILE_START. */
+#define ARM_OS_NAME "NetBSD"
+
+/* Unsigned chars produces much better code than signed. */
+#define DEFAULT_SIGNED_CHAR 0
+
+/* Since we always use GAS as our assembler we support stabs. */
+#define DBX_DEBUGGING_INFO 1
+
+/*#undef ASM_DECLARE_FUNCTION_NAME*/
+
+/* ARM6 family default cpu. */
+#define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6
+
+/* Default is to use APCS-32 mode. */
+#define TARGET_DEFAULT ARM_FLAG_APCS_32
+
+#include "arm/aout.h"
+
+/* This gets redefined in config/netbsd.h. */
+#undef TARGET_MEM_FUNCTIONS
+
+#include <netbsd.h>
+
+/* Some defines for CPP.
+ arm32 is the NetBSD port name, so we always define arm32 and __arm32__. */
+#undef CPP_PREDEFINES
+#define CPP_PREDEFINES "\
+-Dunix -Driscbsd -Darm32 -D__arm32__ -D__NetBSD__ \
+-Asystem(unix) -Asystem(NetBSD) -Acpu(arm) -Amachine(arm)"
+
+/* Define _POSIX_SOURCE if necessary. */
+#undef CPP_SPEC
+#define CPP_SPEC "\
+%(cpp_cpu_arch) %(cpp_apcs_pc) %(cpp_float) %(cpp_endian) \
+%{posix:-D_POSIX_SOURCE} \
+"
+
+/* Because TARGET_DEFAULT sets ARM_FLAG_APCS_32 */
+#undef CPP_APCS_PC_DEFAULT_SPEC
+#define CPP_APCS_PC_DEFAULT_SPEC "-D__APCS_32__"
+
+#undef SIZE_TYPE
+#define SIZE_TYPE "unsigned int"
+
+#undef PTRDIFF_TYPE
+#define PTRDIFF_TYPE "int"
+
+#undef WCHAR_TYPE
+#define WCHAR_TYPE "int"
+
+#undef WCHAR_UNSIGNED
+#define WCHAR_UNSIGNED 0
+
+#undef WCHAR_TYPE_SIZE
+#define WCHAR_TYPE_SIZE 32
+
+#define HANDLE_SYSV_PRAGMA
+
+/* We don't have any limit on the length as out debugger is GDB. */
+#undef DBX_CONTIN_LENGTH
+
+/* NetBSD does its profiling differently to the Acorn compiler. We
+ don't need a word following the mcount call; and to skip it
+ requires either an assembly stub or use of fomit-frame-pointer when
+ compiling the profiling functions. Since we break Acorn CC
+ compatibility below a little more won't hurt. */
+
+#undef FUNCTION_PROFILER
+#define FUNCTION_PROFILER(STREAM,LABELNO) \
+{ \
+ fprintf(STREAM, "\tmov\t%sip, %slr\n", REGISTER_PREFIX, REGISTER_PREFIX); \
+ fprintf(STREAM, "\tbl\tmcount\n"); \
+}
+
+/* VERY BIG NOTE : Change of structure alignment for RiscBSD.
+ There are consequences you should be aware of...
+
+ Normally GCC/arm uses a structure alignment of 32 for compatibility
+ with armcc. This means that structures are padded to a word
+ boundry. However this causes problems with bugged NetBSD kernel
+ code (possibly userland code as well - I have not checked every
+ binary). The nature of this bugged code is to rely on sizeof()
+ returning the correct size of various structures rounded to the
+ nearest byte (SCSI and ether code are two examples, the vm system
+ is another). This code breaks when the structure alignment is 32
+ as sizeof() will report a word=rounded size. By changing the
+ structure alignment to 8. GCC will conform to what is expected by
+ NetBSD.
+
+ This has several side effects that should be considered.
+ 1. Structures will only be aligned to the size of the largest member.
+ i.e. structures containing only bytes will be byte aligned.
+ structures containing shorts will be half word alinged.
+ structures containing ints will be word aligned.
+
+ This means structures should be padded to a word boundry if
+ alignment of 32 is required for byte structures etc.
+
+ 2. A potential performance penalty may exist if strings are no longer
+ word aligned. GCC will not be able to use word load/stores to copy
+ short strings.
+
+ This modification is not encouraged but with the present state of the
+ NetBSD source tree it is currently the only solution that meets the
+ requirements. */
+#undef STRUCTURE_SIZE_BOUNDARY
+#define STRUCTURE_SIZE_BOUNDARY 8
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