openbsd.h: New file.

        * m68k/openbsd.h: New file.
        * m68k/xm-openbsd.h: New file.

From-SVN: r25281

1 files changed, 121 insertions, 0 deletions

diff --git a/gcc/config/m68k/openbsd.h b/gcc/config/m68k/openbsd.h
new file mode 100644
index 0000000..bdec456
--- /dev/null
+++ b/gcc/config/m68k/openbsd.h
@@ -0,0 +1,121 @@
+/* Configuration file for an m68k OpenBSD target.
+   Copyright (C) 1999 Free Software Foundation, Inc.
+
+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, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+/* m68k is an old configuration that does not yet use the TARGET_CPU_DEFAULT
+   framework.  */
+#define TARGET_DEFAULT (MASK_BITFIELD | MASK_68881 | MASK_68020)
+
+#include <m68k/m68k.h>
+
+/* Get generic OpenBSD definitions.  */
+#define OBSD_OLD_GAS
+#include <openbsd.h>
+
+/* Define __HAVE_68881__ in preprocessor, unless -msoft-float is specified.
+   This will control the use of inline 68881 insns in certain macros.  */
+#undef CPP_SPEC
+#define CPP_SPEC "%{!msoft-float:-D__HAVE_68881__ -D__HAVE_FPU__} %{posix:-D_POSIX_SOURCE} %{pthread:-D_POSIX_THREADS}"
+
+/* Run-time target specifications */
+#define CPP_PREDEFINES "-D__unix__ -D__m68k__ -D__mc68000__ -D__mc68020__ -D__OpenBSD__ -Asystem(unix) -Asystem(OpenBSD) -Acpu(m68k) -Amachine(m68k)"
+
+/* TODO: activate subtarget types when gas is updated.
+#define ASM_SPEC "%| %{m68030} %{m68040} %{m68060} %{fpic:-k} %{fPIC:-k -K}"
+ */
+
+/* Layout of source language data types.  */
+
+/* This must agree with <machine/ansi.h> */
+#undef SIZE_TYPE
+#define SIZE_TYPE "unsigned int"
+
+#undef PTRDIFF_TYPE
+#define PTRDIFF_TYPE "int"
+
+#undef WCHAR_TYPE
+#define WCHAR_TYPE "int"
+
+#undef WCHAR_TYPE_SIZE
+#define WCHAR_TYPE_SIZE 32
+
+/* Storage layout.  */
+
+/* Every structure or union's size must be a multiple of 2 bytes.  */
+#define STRUCTURE_SIZE_BOUNDARY 16
+
+/* Specific options for DBX Output.  */
+
+/* This is BSD, so it wants DBX format.  */
+#define DBX_DEBUGGING_INFO
+
+/* Do not break .stabs pseudos into continuations.  */
+#define DBX_CONTIN_LENGTH 0
+
+/* This is the char to use for continuation (in case we need to turn
+   continuation back on).  */
+#define DBX_CONTIN_CHAR '?'
+
+/* Stack & calling: aggregate returns.  */
+
+/* Don't default to pcc-struct-return, because gcc is the only compiler, and
+   we want to retain compatibility with older gcc versions.  */
+#define DEFAULT_PCC_STRUCT_RETURN 0
+
+/* Assembler format: exception region output.  */
+
+/* All configurations that don't use elf must be explicit about not using
+   dwarf unwind information. egcs doesn't try too hard to check internal
+   configuration files...  */
+#define DWARF2_UNWIND_INFO 0
+
+
+/* TODO: ASM_OUTPUT_MI_THUNK is busted. I need to figure out 
+   what bra func@PLTPC means under linux, and find the corresponding 
+   construction for our gas/pic setup.  */
+#if 0
+/* Taken from linux.h. Processor dependent optimized code to handle C++
+   multiple inheritance vtable lookup.  */
+
+/* Output code to add DELTA to the first argument, and then jump to FUNCTION.
+   Used for C++ multiple inheritance.  */
+#define ASM_OUTPUT_MI_THUNK(FILE, THUNK_FNDECL, DELTA, FUNCTION)	\
+do {									\
+  if (DELTA > 0 && DELTA <= 8)						\
+    asm_fprintf (FILE, "\taddq.l %I%d,4(%Rsp)\n", DELTA);		\
+  else if (DELTA < 0 && DELTA >= -8)					\
+    asm_fprintf (FILE, "\tsubq.l %I%d,4(%Rsp)\n", -DELTA);		\
+  else									\
+    asm_fprintf (FILE, "\tadd.l %I%d,4(%Rsp)\n", DELTA);		\
+									\
+  if (flag_pic)								\
+    {									\
+      fprintf (FILE, "\tbra.l ");					\
+      assemble_name (FILE, XSTR (XEXP (DECL_RTL (FUNCTION), 0), 0));	\
+      fprintf (FILE, "@PLTPC\n");					\
+    }									\
+  else									\
+    {									\
+      fprintf (FILE, "\tjmp ");						\
+      assemble_name (FILE, XSTR (XEXP (DECL_RTL (FUNCTION), 0), 0));	\
+      fprintf (FILE, "\n");						\
+    }									\
+} while (0)
+#endif
+