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1.1 root 1: /* Definitions of target machine for GNU compiler. 1.1.1.4 ! root 2: Motorola m88100 running the AT&T/Unisoft/Motorola V.3 reference port. 1.1 root 3: Copyright (C) 1990, 1991 Free Software Foundation, Inc. 4: Contributed by Ray Essick ([email protected]) 5: Currently supported 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.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 1.1.1.4 ! root 33: #define CPP_PREDEFINES "-Dm88000 -Dm88k -Dunix -DsysV88 -D__CLASSIFY_TYPE__=2" 1.1 root 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 \ 1.1.1.2 root 39: "%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}} crtbegin.o%s" 1.1 root 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 1.1.1.2 root 44: #define LIB_SPEC "%{p:-L/lib/libp}%{pg:%{!p:-L/lib/libp}} -lg -lc crtend.o%s" 1.1 root 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 1.1.1.2 root 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); \ 1.1.1.3 root 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 */ 1.1.1.2 root 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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