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git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@446 138bc75d-0d04-0410-961f-82ee72b054a4

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+/* Definitions of target machine for GNU compiler.
+
+   Citicorp/TTI Unicom PBB version (using GAS with a %-register prefix)
+
+   Copyright (C) 1987, 1988, 1990 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, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/* Note:   This config uses a version of gas with a postprocessing stage that
+   converts the output of gas to coff containing stab debug symbols.
+   (See vasta@apollo.com or mb@soldev.tti.com) */
+
+#include "m68k.h"
+
+/* See m68k.h.  5 means 68020 without 68881.  */
+
+#define TARGET_DEFAULT 5
+
+/* Every structure or union's size must be a multiple of 2 bytes.  */
+#define STRUCTURE_SIZE_BOUNDARY 16
+
+/* Define __HAVE_68881__ in preprocessor if -m68881 is specified.
+   This will control the use of inline 68881 insns in certain macros.  */
+
+#define CPP_SPEC "%{m68881:-D__HAVE_68881__}"
+
+/* Names to predefine in the preprocessor for this target machine.  */
+
+#define CPP_PREDEFINES "-Dm68k -Dunix -DUnicomPBB -Dmc68k -Dmc68020 -Dmc68k32"
+
+/* We want DBX format for use with gdb under COFF.  */
+
+#define DBX_DEBUGGING_INFO
+
+/* Generate calls to memcpy, memcmp and memset.  */
+
+#define TARGET_MEM_FUNCTIONS
+
+/* -m68000 requires special flags to the assembler. */
+
+#define ASM_SPEC \
+ " %{m68000:-mc68010}%{mc68000:-mc68010}"
+
+/* we use /lib/libp/lib*  when profiling */
+
+#define LIB_SPEC "%{p:-L/usr/lib/libp} %{pg:-L/usr/lib/libp} -lc"
+
+
+/* Use crt1.o as a startup file and crtn.o as a closing file.  */
+/*
+ * The loader directive file gcc.ifile defines how to merge the constructor 
+ * sections into the data section.  Also, since gas only puts out those 
+ * sections in response to N_SETT stabs, and does not (yet) have a 
+ * ".sections" directive, gcc.ifile also defines the list symbols 
+ * __DTOR_LIST__ and __CTOR_LIST__.
+ * 
+ * Finally, we must explicitly specify the file from libgcc.a that defines
+ * exit(), otherwise if the user specifies (for example) "-lc_s" on the 
+ * command line, the wrong exit() will be used and global destructors will 
+ * not get called .
+ */
+
+#define STARTFILE_SPEC \
+"%{!r: gcc.ifile%s} %{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}} \
+%{!r:_exit.o%s}"
+
+#define ENDFILE_SPEC "crtn.o%s"
+
+/* cpp has to support a #sccs directive for the /usr/include files */
+
+#define SCCS_DIRECTIVE
+
+/* GAS register prefix assembly syntax: */
+
+/* User labels have no prefix */
+#undef  USER_LABEL_PREFIX 
+#define USER_LABEL_PREFIX ""
+
+/* local labels are prefixed with ".L" */
+#undef  LOCAL_LABEL_PREFIX
+#define LOCAL_LABEL_PREFIX "."
+
+/* registers are prefixed with "%" */
+#undef  REGISTER_PREFIX
+#define REGISTER_PREFIX "%"
+
+#undef REGISTER_NAMES
+#define REGISTER_NAMES \
+{"%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7",	\
+ "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%a6", "%sp",	\
+ "%fp0", "%fp1", "%fp2", "%fp3", "%fp4", "%fp5", "%fp6", "%fp7"}
+
+#undef FUNCTION_EXTRA_EPILOGUE
+#define FUNCTION_EXTRA_EPILOGUE(FILE, SIZE)				\
+  { extern int current_function_returns_pointer;			\
+    if ((current_function_returns_pointer) &&				\
+      ! find_equiv_reg (0, get_last_insn (), 0, 0, 0, 8, Pmode))        \
+      asm_fprintf (FILE, "\tmovl %Rd0,%Ra0\n"); } 
+
+#define ASM_RETURN_CASE_JUMP   return "jmp %%pc@(2,%0:w)"
+
+/* Although the gas we use can create .ctor and .dtor sections from N_SETT
+   stabs, it does not support section directives, so we need to have the loader
+   define the lists.
+ */
+#define CTOR_LISTS_DEFINED_EXTERNALLY
+
+/* similar to default, but allows for the table defined by ld with gcc.ifile. 
+   nptrs is always 0.  So we need to instead check that __DTOR_LIST__[1] != 0.
+   The old check is left in so that the same macro can be used if and when  
+   a future version of gas does support section directives. */
+
+#define DO_GLOBAL_DTORS_BODY {int nptrs = *(int *)__DTOR_LIST__; int i; \
+  if (nptrs == -1 || (__DTOR_LIST__[0] == 0 && __DTOR_LIST__[1] != 0))  \
+    for (nptrs = 0; __DTOR_LIST__[nptrs + 1] != 0; nptrs++); 		\
+  for (i = nptrs; i >= 1; i--)						\
+    __DTOR_LIST__[i] (); }
+
+/* 
+ * Here is an example gcc.ifile.  I've tested it on PBB 68k and on sco 386
+ * systems. The NEXT(0x200000) works on just about all 386 and m68k systems, 
+ * but can be reduced to any power of 2 that is >= NBPS (0x10000 on a pbb).
+
+   SECTIONS {
+       .text BIND(0x200200) BLOCK (0x200) : 
+		{ *(.init) *(.text) vfork = fork; *(.fini) }
+
+      	GROUP BIND( NEXT(0x200000) + ADDR(.text) + SIZEOF(.text)):
+	{      .data : { __CTOR_LIST__ = . ; . += 4; *(.ctor) . += 4 ;
+		       	 __DTOR_LIST__ = . ; . += 4; *(.dtor) . += 4 ; }
+	       .bss : { }
+       }
+  }
+ */
+
+/*
+Local variables:
+version-control: t
+End:
+*/