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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, 1996, 1997 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. */
/* 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/m68k.h"
/* See m68k.h. 5 means 68020 without 68881. */
#define TARGET_DEFAULT (MASK_BITFIELD|MASK_68020)
/* Don't try using XFmode. */
#undef LONG_DOUBLE_TYPE_SIZE
#define LONG_DOUBLE_TYPE_SIZE 64
/* 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 -Asystem=unix -Acpu=m68k -Amachine=m68k"
/* We want DBX format for use with gdb under COFF. */
#define DBX_DEBUGGING_INFO 1
/* 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"
/* 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) \
{ 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 \
do { \
if (TARGET_5200) \
return "ext%.l %0\n\tjmp %%pc@(2,%0:l)"; \
else \
return "jmp %%pc@(2,%0:w)"; \
} while (0)
/* 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:
*/
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