164 lines
5.4 KiB
C
164 lines
5.4 KiB
C
/* Definitions of target machine for GNU compiler.
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Citicorp/TTI Unicom PBB version (using GAS with a %-register prefix)
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Copyright (C) 1987, 1988, 1990, 1996, 1997 Free Software Foundation, Inc.
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* Note: This config uses a version of gas with a postprocessing stage that
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converts the output of gas to coff containing stab debug symbols.
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(See vasta@apollo.com or mb@soldev.tti.com) */
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#include "m68k/m68k.h"
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/* See m68k.h. 5 means 68020 without 68881. */
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#define TARGET_DEFAULT (MASK_BITFIELD|MASK_68020)
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/* Don't try using XFmode. */
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#undef LONG_DOUBLE_TYPE_SIZE
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#define LONG_DOUBLE_TYPE_SIZE 64
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/* Every structure or union's size must be a multiple of 2 bytes. */
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#define STRUCTURE_SIZE_BOUNDARY 16
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/* Define __HAVE_68881__ in preprocessor if -m68881 is specified.
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This will control the use of inline 68881 insns in certain macros. */
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#define CPP_SPEC "%{m68881:-D__HAVE_68881__}"
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/* Names to predefine in the preprocessor for this target machine. */
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#define CPP_PREDEFINES "-Dm68k -Dunix -DUnicomPBB -Dmc68k -Dmc68020 -Dmc68k32 -Asystem(unix) -Acpu(m68k) -Amachine(m68k)"
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/* We want DBX format for use with gdb under COFF. */
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#define DBX_DEBUGGING_INFO
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/* Generate calls to memcpy, memcmp and memset. */
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#define TARGET_MEM_FUNCTIONS
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/* -m68000 requires special flags to the assembler. */
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#define ASM_SPEC \
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" %{m68000:-mc68010}%{mc68000:-mc68010}"
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/* we use /lib/libp/lib* when profiling */
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#define LIB_SPEC "%{p:-L/usr/lib/libp} %{pg:-L/usr/lib/libp} -lc"
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/* Use crt1.o as a startup file and crtn.o as a closing file. */
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/*
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* The loader directive file gcc.ifile defines how to merge the constructor
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* sections into the data section. Also, since gas only puts out those
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* sections in response to N_SETT stabs, and does not (yet) have a
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* ".sections" directive, gcc.ifile also defines the list symbols
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* __DTOR_LIST__ and __CTOR_LIST__.
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*
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* Finally, we must explicitly specify the file from libgcc.a that defines
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* exit(), otherwise if the user specifies (for example) "-lc_s" on the
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* command line, the wrong exit() will be used and global destructors will
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* not get called .
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*/
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#define STARTFILE_SPEC \
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"%{!r: gcc.ifile%s} %{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}} \
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%{!r:_exit.o%s}"
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#define ENDFILE_SPEC "crtn.o%s"
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/* cpp has to support a #sccs directive for the /usr/include files */
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#define SCCS_DIRECTIVE
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/* GAS register prefix assembly syntax: */
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/* User labels have no prefix */
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#undef USER_LABEL_PREFIX
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#define USER_LABEL_PREFIX ""
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/* local labels are prefixed with ".L" */
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#undef LOCAL_LABEL_PREFIX
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#define LOCAL_LABEL_PREFIX "."
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/* registers are prefixed with "%" */
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#undef REGISTER_PREFIX
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#define REGISTER_PREFIX "%"
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#undef REGISTER_NAMES
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#define REGISTER_NAMES \
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{"%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7", \
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"%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%a6", "%sp", \
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"%fp0", "%fp1", "%fp2", "%fp3", "%fp4", "%fp5", "%fp6", "%fp7"}
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#undef FUNCTION_EXTRA_EPILOGUE
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#define FUNCTION_EXTRA_EPILOGUE(FILE, SIZE) \
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{ extern int current_function_returns_pointer; \
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if ((current_function_returns_pointer) && \
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! find_equiv_reg (0, get_last_insn (), 0, 0, 0, 8, Pmode)) \
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asm_fprintf (FILE, "\tmovl %Rd0,%Ra0\n"); }
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#define ASM_RETURN_CASE_JUMP \
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do { \
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if (TARGET_5200) \
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return "ext%.l %0\n\tjmp %%pc@(2,%0:l)"; \
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else \
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return "jmp %%pc@(2,%0:w)"; \
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} while (0)
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/* Although the gas we use can create .ctor and .dtor sections from N_SETT
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stabs, it does not support section directives, so we need to have the loader
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define the lists.
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*/
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#define CTOR_LISTS_DEFINED_EXTERNALLY
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/* similar to default, but allows for the table defined by ld with gcc.ifile.
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nptrs is always 0. So we need to instead check that __DTOR_LIST__[1] != 0.
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The old check is left in so that the same macro can be used if and when
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a future version of gas does support section directives. */
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#define DO_GLOBAL_DTORS_BODY {int nptrs = *(int *)__DTOR_LIST__; int i; \
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if (nptrs == -1 || (__DTOR_LIST__[0] == 0 && __DTOR_LIST__[1] != 0)) \
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for (nptrs = 0; __DTOR_LIST__[nptrs + 1] != 0; nptrs++); \
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for (i = nptrs; i >= 1; i--) \
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__DTOR_LIST__[i] (); }
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/*
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* Here is an example gcc.ifile. I've tested it on PBB 68k and on sco 386
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* systems. The NEXT(0x200000) works on just about all 386 and m68k systems,
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* but can be reduced to any power of 2 that is >= NBPS (0x10000 on a pbb).
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SECTIONS {
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.text BIND(0x200200) BLOCK (0x200) :
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{ *(.init) *(.text) vfork = fork; *(.fini) }
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GROUP BIND( NEXT(0x200000) + ADDR(.text) + SIZEOF(.text)):
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{ .data : { __CTOR_LIST__ = . ; . += 4; *(.ctor) . += 4 ;
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__DTOR_LIST__ = . ; . += 4; *(.dtor) . += 4 ; }
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.bss : { }
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}
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}
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*/
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/*
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Local variables:
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version-control: t
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End:
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*/
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