151 lines
5.5 KiB
C
151 lines
5.5 KiB
C
/* Definitions of target machine for GNU compiler.
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Motorola m88100 running the AT&T/Unisoft/Motorola V.3 reference port.
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Copyright (C) 1990, 1991 Free Software Foundation, Inc.
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Contributed by Ray Essick (ressick@mot.com)
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Enhanced by Tom Wood (Tom_Wood@NeXT.com)
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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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#include "m88k/m88k.h"
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/* Default switches */
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#undef TARGET_DEFAULT
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#define TARGET_DEFAULT (MASK_CHECK_ZERO_DIV | \
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MASK_OCS_DEBUG_INFO | \
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MASK_OCS_FRAME_POSITION)
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/* Macros to be automatically defined. */
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#undef CPP_PREDEFINES
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#define CPP_PREDEFINES "-Dm88000 -Dm88k -Dunix -DsysV88 -D__CLASSIFY_TYPE__=2 -Asystem(unix) -Asystem(svr3) -Acpu(m88k) -Amachine(m88k)"
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/* Override svr3.h to link with ?crt0.o instead of ?crt1.o and ?crtn.o.
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From arul@sdsu.edu. */
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#undef STARTFILE_SPEC
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#define STARTFILE_SPEC \
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"%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}} crtbegin.o%s"
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/* Profiled libraries live in a different directory but keep the same
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names other than that. arul@sdsu.edu says -lg is always needed. */
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#undef LIB_SPEC
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#define LIB_SPEC "%{p:-L/lib/libp}%{pg:%{!p:-L/lib/libp}} -lg -lc crtend.o%s"
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/* Hot version of the profiler that uses r10 to pass the address of
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the counter. the _gcc_mcount routine knows not to screw with
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the parameter registers.
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DG/UX does this; i wrote a gnu-c/88k specific version and put it
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in libgcc2.c -- RBE; this macro knows about the leading underscore
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convention. */
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#undef FUNCTION_PROFILER
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#define FUNCTION_PROFILER(FILE, LABELNO) \
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output_function_profiler (FILE, LABELNO, "_gcc_mcount", 0)
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/* Various other changes that we want to have in place without
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too many changes to the m88k.h file. */
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#undef USE_LIBG
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#define USE_LIBG
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/* Define a few machine-specific details of the implementation of
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constructors. */
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/* Although the .init section is used, it is not automatically invoked. */
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#define INVOKE__main
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/* State that atexit exists so __do_global_ctors will register
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__do_global_dtors. */
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#define HAVE_ATEXIT
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#define CTOR_LIST_BEGIN \
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asm (INIT_SECTION_ASM_OP); \
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asm ("\tsubu\t r31,r31,16"); /* (STACK_BOUNDARY / BITS_PER_UNIT) == 16 */ \
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asm ("\tst\t r0,r31,32"); /* REG_PARM_STACK_SPACE (0) == 32 */
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#define CTOR_LIST_END
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/* ASM_OUTPUT_CONSTRUCTOR outputs code into the .init section to push the
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address of the constructor. This becomes the body of __do_global_ctors
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in crtstuff.c. r13 is a temporary register. */
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#undef ASM_OUTPUT_CONSTRUCTOR
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#define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME) \
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do { \
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init_section (); \
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fprintf (FILE, "\tor.u\t r13,r0,hi16("); \
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assemble_name (FILE, NAME); \
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fprintf (FILE, ")\n\tor\t r13,r13,lo16("); \
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assemble_name (FILE, NAME); \
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fprintf (FILE, ")\n\tsubu\t r31,r31,%d\n\tst\t r13,r31,%d\n", \
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STACK_BOUNDARY / BITS_PER_UNIT, REG_PARM_STACK_SPACE (0)); \
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} while (0)
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#undef DO_GLOBAL_CTORS_BODY
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#define DO_GLOBAL_CTORS_BODY \
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do { \
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func_ptr *__CTOR_LIST__ = __builtin_alloca (1), *p; \
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for (p = __CTOR_LIST__ + 4; *p; p += 4) \
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(*p) (); \
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} while (0)
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#define DTOR_LIST_BEGIN \
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asm (FINI_SECTION_ASM_OP); \
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func_ptr __DTOR_LIST__[4] = { (func_ptr) (-1), (func_ptr) (-1), \
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(func_ptr) (-1), (func_ptr) (-1) }
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#define DTOR_LIST_END \
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asm (FINI_SECTION_ASM_OP); \
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func_ptr __DTOR_END__[4] = { (func_ptr) 0, (func_ptr) 0, \
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(func_ptr) 0, (func_ptr) 0 }
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/* A C statement (sans semicolon) to output an element in the table of
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global destructors. The table is constructed in the .fini section
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so that an explicit linker script is not required. The complication
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is that this section is padded with NOP instructions and to either
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8 or 16 byte alignment depending on the specific system. A clever
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way to avoid trouble is to output a block of 16 bytes where the
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extra words are known values (-1). */
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#undef ASM_OUTPUT_DESTRUCTOR
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#define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \
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do { \
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register int i; \
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fini_section (); \
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fprintf (FILE, "\t%s\t ", ASM_LONG); \
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assemble_name (FILE,NAME); \
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fprintf (FILE, "\n"); \
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for (i = 1; i < 4; i++) \
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fprintf (FILE, "\t%s\t -1\n", ASM_LONG); \
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} while (0)
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/* Walk the list looking for the terminating zero and ignoring all values of
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-1. */
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#undef DO_GLOBAL_DTORS_BODY
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#define DO_GLOBAL_DTORS_BODY \
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do { \
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int i; \
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for (i = 0; __DTOR_LIST__[i] != 0; i++) \
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if (((int *)__DTOR_LIST__)[i] != -1) \
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__DTOR_LIST__[i] (); \
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} while (0)
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#undef INITIALIZE_TRAMPOLINE
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#define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
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{ \
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emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 40)), FNADDR); \
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emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 36)), CXT); \
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emit_call_insn (gen_call (gen_rtx (MEM, SImode, \
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gen_rtx (SYMBOL_REF, Pmode, \
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"__enable_execute_stack")), \
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const0_rtx)); \
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}
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