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Annotation of GNUtools/cc/config/m88k/sysv3.h, revision 1.1

1.1     ! root        1: /* Definitions of target machine for GNU compiler.
        !             2:    Motorola m88100 running the AT&T/Unisoft/Motorola V.3 reference port.
        !             3:    Copyright (C) 1990, 1991 Free Software Foundation, Inc.
        !             4:    Contributed by Ray Essick ([email protected])
        !             5:    Enhanced by Tom Wood ([email protected])
        !             6: 
        !             7: This file is part of GNU CC.
        !             8: 
        !             9: GNU CC is free software; you can redistribute it and/or modify
        !            10: it under the terms of the GNU General Public License as published by
        !            11: the Free Software Foundation; either version 2, or (at your option)
        !            12: any later version.
        !            13: 
        !            14: GNU CC is distributed in the hope that it will be useful,
        !            15: but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            16: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            17: GNU General Public License for more details.
        !            18: 
        !            19: You should have received a copy of the GNU General Public License
        !            20: along with GNU CC; see the file COPYING.  If not, write to
        !            21: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
        !            22: 
        !            23: #include "m88k/m88k.h"
        !            24: 
        !            25: /* Default switches */
        !            26: #undef TARGET_DEFAULT
        !            27: #define TARGET_DEFAULT (MASK_CHECK_ZERO_DIV    | \
        !            28:                         MASK_OCS_DEBUG_INFO    | \
        !            29:                         MASK_OCS_FRAME_POSITION)
        !            30: 
        !            31: /* Macros to be automatically defined.  */
        !            32: #undef CPP_PREDEFINES
        !            33: #define CPP_PREDEFINES "-Dm88000 -Dm88k -Dunix -DsysV88 -D__CLASSIFY_TYPE__=2 -Asystem(unix) -Asystem(svr3) -Acpu(m88k) -Amachine(m88k)"
        !            34: 
        !            35: /* Override svr3.h to link with ?crt0.o instead of ?crt1.o and ?crtn.o.
        !            36:    From [email protected].  */
        !            37: #undef STARTFILE_SPEC
        !            38: #define STARTFILE_SPEC \
        !            39:    "%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}} crtbegin.o%s"
        !            40: 
        !            41: /* Profiled libraries live in a different directory but keep the same
        !            42:    names other than that.  [email protected] says -lg is always needed.  */
        !            43: #undef LIB_SPEC
        !            44: #define LIB_SPEC "%{p:-L/lib/libp}%{pg:%{!p:-L/lib/libp}} -lg -lc crtend.o%s"
        !            45: 
        !            46: /* Hot version of the profiler that uses r10 to pass the address of
        !            47:    the counter.  the _gcc_mcount routine knows not to screw with
        !            48:    the parameter registers.
        !            49: 
        !            50:    DG/UX does this; i wrote a gnu-c/88k specific version and put it
        !            51:    in libgcc2.c -- RBE; this macro knows about the leading underscore
        !            52:    convention.  */
        !            53: #undef FUNCTION_PROFILER
        !            54: #define FUNCTION_PROFILER(FILE, LABELNO) \
        !            55:   output_function_profiler (FILE, LABELNO, "_gcc_mcount", 0)
        !            56: 
        !            57: /* Various other changes that we want to have in place without
        !            58:    too many changes to the m88k.h file.  */
        !            59: #undef USE_LIBG
        !            60: #define        USE_LIBG
        !            61: 
        !            62: /* Define a few machine-specific details of the implementation of
        !            63:    constructors.  */
        !            64: 
        !            65: /* Although the .init section is used, it is not automatically invoked.  */
        !            66: #define INVOKE__main
        !            67: 
        !            68: /* State that atexit exists so __do_global_ctors will register
        !            69:    __do_global_dtors.  */
        !            70: #define HAVE_ATEXIT
        !            71: 
        !            72: #define CTOR_LIST_BEGIN                        \
        !            73:   asm (INIT_SECTION_ASM_OP);           \
        !            74:   asm ("\tsubu\t r31,r31,16"); /* (STACK_BOUNDARY / BITS_PER_UNIT) == 16 */ \
        !            75:   asm ("\tst\t r0,r31,32");    /* REG_PARM_STACK_SPACE (0) == 32 */
        !            76: #define CTOR_LIST_END
        !            77: 
        !            78: /* ASM_OUTPUT_CONSTRUCTOR outputs code into the .init section to push the
        !            79:    address of the constructor.  This becomes the body of __do_global_ctors
        !            80:    in crtstuff.c.  r13 is a temporary register.  */
        !            81: #undef ASM_OUTPUT_CONSTRUCTOR
        !            82: #define ASM_OUTPUT_CONSTRUCTOR(FILE,NAME)                              \
        !            83:   do {                                                                 \
        !            84:     init_section ();                                                   \
        !            85:     fprintf (FILE, "\tor.u\t r13,r0,hi16(");                           \
        !            86:     assemble_name (FILE, NAME);                                                \
        !            87:     fprintf (FILE, ")\n\tor\t r13,r13,lo16(");                         \
        !            88:     assemble_name (FILE, NAME);                                                \
        !            89:     fprintf (FILE, ")\n\tsubu\t r31,r31,%d\n\tst\t r13,r31,%d\n",      \
        !            90:             STACK_BOUNDARY / BITS_PER_UNIT, REG_PARM_STACK_SPACE (0)); \
        !            91:   } while (0)
        !            92: 
        !            93: #undef DO_GLOBAL_CTORS_BODY
        !            94: #define DO_GLOBAL_CTORS_BODY                                           \
        !            95: do {                                                                   \
        !            96:   func_ptr *__CTOR_LIST__ = __builtin_alloca (0), *p;                  \
        !            97:   for (p = __CTOR_LIST__; *p; p += 4)                                  \
        !            98:     (*p) ();                                                           \
        !            99: } while (0)
        !           100: 
        !           101: #define DTOR_LIST_BEGIN                                                        \
        !           102:   asm (FINI_SECTION_ASM_OP);                                           \
        !           103:   func_ptr __DTOR_LIST__[4] = { (func_ptr) (-1), (func_ptr) (-1),      \
        !           104:                                (func_ptr) (-1), (func_ptr) (-1) }
        !           105: #define DTOR_LIST_END                                                  \
        !           106:   asm (FINI_SECTION_ASM_OP);                                           \
        !           107:   func_ptr __DTOR_END__[4] = { (func_ptr) 0, (func_ptr) 0,             \
        !           108:                               (func_ptr) 0, (func_ptr) 0 }  
        !           109: 
        !           110: /* A C statement (sans semicolon) to output an element in the table of
        !           111:    global destructors.  The table is constructed in the .fini section
        !           112:    so that an explicit linker script is not required.  The complication
        !           113:    is that this section is padded with NOP instructions and to either
        !           114:    8 or 16 byte alignment depending on the specific system.  A clever
        !           115:    way to avoid trouble is to output a block of 16 bytes where the
        !           116:    extra words are known values (-1).  */
        !           117: #undef ASM_OUTPUT_DESTRUCTOR
        !           118: #define ASM_OUTPUT_DESTRUCTOR(FILE,NAME)       \
        !           119:   do {                                         \
        !           120:     register int i;                            \
        !           121:     fini_section ();                           \
        !           122:     fprintf (FILE, "\t%s\t ", ASM_LONG);       \
        !           123:     assemble_name (FILE,NAME);                 \
        !           124:     fprintf (FILE, "\n");                      \
        !           125:     for (i = 1; i < 4; i++)                    \
        !           126:       fprintf (FILE, "\t%s\t -1\n", ASM_LONG); \
        !           127:     } while (0)
        !           128: 
        !           129: /* Walk the list looking for the terminating zero and ignoring all values of
        !           130:    -1.  */
        !           131: #undef DO_GLOBAL_DTORS_BODY
        !           132: #define DO_GLOBAL_DTORS_BODY                   \
        !           133:   do {                                         \
        !           134:     int i;                                     \
        !           135:     for (i = 0; __DTOR_LIST__[i] != 0; i++)    \
        !           136:       if (((int *)__DTOR_LIST__)[i] != -1)     \
        !           137:        __DTOR_LIST__[i] ();                    \
        !           138:   } while (0)                                  

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