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1.1 ! root 1: /* Target definitions for GNU compiler for Intel 80860 running System V.3 ! 2: Copyright (C) 1991 Free Software Foundation, Inc. ! 3: ! 4: Written by Ron Guilmette ([email protected]). ! 5: ! 6: This file is part of GNU CC. ! 7: ! 8: GNU CC is free software; you can redistribute it and/or modify ! 9: it under the terms of the GNU General Public License as published by ! 10: the Free Software Foundation; either version 2, or (at your option) ! 11: any later version. ! 12: ! 13: GNU CC is distributed in the hope that it will be useful, ! 14: but WITHOUT ANY WARRANTY; without even the implied warranty of ! 15: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ! 16: GNU General Public License for more details. ! 17: ! 18: You should have received a copy of the GNU General Public License ! 19: along with GNU CC; see the file COPYING. If not, write to ! 20: the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ ! 21: ! 22: #include "i860.h" ! 23: #include "svr3.h" ! 24: ! 25: /* Provide a set of pre-definitions and pre-assertions appropriate for ! 26: the i860 running svr3. */ ! 27: #define CPP_PREDEFINES "-Di860 -Dunix -DSVR3" ! 28: ! 29: /* Use crt1.o as a startup file and crtn.o as a closing file. */ ! 30: ! 31: #define STARTFILE_SPEC \ ! 32: "%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}" ! 33: ! 34: #define LIB_SPEC "%{p:-L/usr/lib/libp}%{pg:-L/usr/lib/libp} -lc crtn.o%s" ! 35: ! 36: /* Special flags for the linker. I don't know what they do. */ ! 37: ! 38: #define LINK_SPEC "%{T*} %{z:-lm}" ! 39: ! 40: /* The prefix to be used in assembler output for all names of registers. ! 41: None is needed in V.3. */ ! 42: ! 43: #define I860_REG_PREFIX "" ! 44: ! 45: /* Delimiter that starts comments in the assembler code. */ ! 46: ! 47: #define ASM_COMMENT_START "//" ! 48: ! 49: /* Don't renumber the regusters for debugger output. */ ! 50: ! 51: #define DBX_REGISTER_NUMBER(REGNO) (REGNO) ! 52: ! 53: /* Output the special word the System V SDB wants to see just before ! 54: the first word of each function's prologue code. */ ! 55: ! 56: extern char *current_function_original_name; ! 57: ! 58: /* This special macro is used to output a magic word just before the ! 59: first word of each function. On some versions of UNIX running on ! 60: the i860, this word can be any word that looks like a NOP, however ! 61: under svr4, this neds to be an `shr r0,r0,r0' instruction in which ! 62: the normally unused low-order bits contain the length of the function ! 63: prologue code (in bytes). This is needed to make the System V SDB ! 64: debugger happy. */ ! 65: ! 66: #undef ASM_OUTPUT_FUNCTION_PREFIX ! 67: #define ASM_OUTPUT_FUNCTION_PREFIX(FILE, FNNAME) \ ! 68: do { ASM_OUTPUT_ALIGN (FILE, 2); \ ! 69: fprintf ((FILE), "\t.long\t.ep."); \ ! 70: assemble_name (FILE, FNNAME); \ ! 71: fprintf (FILE, "-"); \ ! 72: assemble_name (FILE, FNNAME); \ ! 73: fprintf (FILE, "+0xc8000000\n"); \ ! 74: current_function_original_name = (FNNAME); \ ! 75: } while (0) ! 76: ! 77: /* Output the special label that must go just after each function's ! 78: prologue code to support svr4 SDB. */ ! 79: ! 80: #define ASM_OUTPUT_PROLOGUE_SUFFIX(FILE) \ ! 81: do { fprintf (FILE, ".ep."); \ ! 82: assemble_name (FILE, current_function_original_name); \ ! 83: fprintf (FILE, ":\n"); \ ! 84: } while (0) ! 85: ! 86: /* The routine used to output string literals. ! 87: ! 88: #define ASCII_DATA_ASM_OP ".byte" ! 89: ! 90: #define ASM_OUTPUT_ASCII(FILE, STR, LENGTH) \ ! 91: do \ ! 92: { \ ! 93: register unsigned char *str = (unsigned char *) (STR); \ ! 94: register unsigned char *limit = str + (LENGTH); \ ! 95: register unsigned bytes_in_chunk = 0; \ ! 96: for (; str < limit; str++) \ ! 97: { \ ! 98: register unsigned ch = *str; \ ! 99: if (ch < 32 || ch == '\\' || ch == '"' || ch >= 127) \ ! 100: { \ ! 101: if (bytes_in_chunk > 0) \ ! 102: { \ ! 103: fprintf ((FILE), "\"\n"); \ ! 104: bytes_in_chunk = 0; \ ! 105: } \ ! 106: fprintf ((FILE), "%s\t%d\n", ASM_BYTE_OP, ch); \ ! 107: } \ ! 108: else \ ! 109: { \ ! 110: if (bytes_in_chunk >= 60) \ ! 111: { \ ! 112: fprintf ((FILE), "\"\n"); \ ! 113: bytes_in_chunk = 0; \ ! 114: } \ ! 115: if (bytes_in_chunk == 0) \ ! 116: fprintf ((FILE), "\t%s\t\"", ASCII_DATA_ASM_OP); \ ! 117: putc (ch, (FILE)); \ ! 118: bytes_in_chunk++; \ ! 119: } \ ! 120: } \ ! 121: if (bytes_in_chunk > 0) \ ! 122: fprintf ((FILE), "\"\n"); \ ! 123: } \ ! 124: while (0) ! 125: ! 126: ! 127: #undef CTORS_SECTION_ASM_OP ! 128: #define CTORS_SECTION_ASM_OP "\t.section\t.ctors,\"x\"\n" ! 129: #undef DTORS_SECTION_ASM_OP ! 130: #define DTORS_SECTION_ASM_OP "\t.section\t.dtors,\"x\"\n" ! 131: ! 132: /* Add definitions to support the .tdesc section as specified in the svr4 ! 133: ABI for the i860. */ ! 134: ! 135: #define TDESC_SECTION_ASM_OP "\t.section\t.tdesc" ! 136: ! 137: #undef EXTRA_SECTIONS ! 138: #define EXTRA_SECTIONS in_const, in_ctors, in_dtors, in_tdesc ! 139: ! 140: #undef EXTRA_SECTION_FUNCTIONS ! 141: #define EXTRA_SECTION_FUNCTIONS \ ! 142: CONST_SECTION_FUNCTION \ ! 143: CTORS_SECTION_FUNCTION \ ! 144: DTORS_SECTION_FUNCTION \ ! 145: TDESC_SECTION_FUNCTION ! 146: ! 147: #define TDESC_SECTION_FUNCTION \ ! 148: void \ ! 149: tdesc_section () \ ! 150: { \ ! 151: if (in_section != in_tdesc) \ ! 152: { \ ! 153: fprintf (asm_out_file, "%s\n", TDESC_SECTION_ASM_OP); \ ! 154: in_section = in_tdesc; \ ! 155: } \ ! 156: } ! 157: ! 158: /* Enable the `const' section that svr3.h defines how to use. */ ! 159: #define USE_CONST_SECTION 1
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