openbsd.h revision 50397
1/* Configuration for an OpenBSD i386 target. 2 3 Copyright (C) 1999 Free Software Foundation, Inc. 4 5This file is part of GNU CC. 6 7GNU CC is free software; you can redistribute it and/or modify 8it under the terms of the GNU General Public License as published by 9the Free Software Foundation; either version 2, or (at your option) 10any later version. 11 12GNU CC is distributed in the hope that it will be useful, 13but WITHOUT ANY WARRANTY; without even the implied warranty of 14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15GNU General Public License for more details. 16 17You should have received a copy of the GNU General Public License 18along with GNU CC; see the file COPYING. If not, write to 19the Free Software Foundation, 59 Temple Place - Suite 330, 20Boston, MA 02111-1307, USA. */ 21 22/* This is tested by i386gas.h. */ 23#define YES_UNDERSCORES 24 25#include <i386/gstabs.h> 26 27/* Get perform_* macros to build libgcc.a. */ 28#include <i386/perform.h> 29 30/* Get generic OpenBSD definitions. */ 31#define OBSD_OLD_GAS 32#include <openbsd.h> 33 34/* Run-time target specifications */ 35#define CPP_PREDEFINES "-D__unix__ -D__i386__ -D__OpenBSD__ -Asystem(unix) -Asystem(OpenBSD) -Acpu(i386) -Amachine(i386)" 36 37/* Layout of source language data types. */ 38 39/* This must agree with <machine/ansi.h> */ 40#undef SIZE_TYPE 41#define SIZE_TYPE "unsigned int" 42 43#undef PTRDIFF_TYPE 44#define PTRDIFF_TYPE "int" 45 46#undef WCHAR_TYPE 47#define WCHAR_TYPE "int" 48 49#undef WCHAR_TYPE_SIZE 50#define WCHAR_TYPE_SIZE 32 51 52/* Assembler format: overall framework. */ 53 54#undef ASM_APP_ON 55#define ASM_APP_ON "#APP\n" 56 57#undef ASM_APP_OFF 58#define ASM_APP_OFF "#NO_APP\n" 59 60/* The following macros were originally stolen from i386v4.h. 61 These have to be defined to get PIC code correct. */ 62 63/* Assembler format: dispatch tables. */ 64 65/* How to output an element of a case-vector that is relative. 66 This is only used for PIC code. See comments by the `casesi' insn in 67 i386.md for an explanation of the expression this outputs. */ 68#undef ASM_OUTPUT_ADDR_DIFF_ELT 69#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \ 70 fprintf (FILE, "\t.long _GLOBAL_OFFSET_TABLE_+[.-%s%d]\n", LPREFIX, VALUE) 71 72/* Assembler format: sections. */ 73 74/* Indicate when jump tables go in the text section. This is 75 necessary when compiling PIC code. */ 76#define JUMP_TABLES_IN_TEXT_SECTION (flag_pic) 77 78/* Stack & calling: aggregate returns. */ 79 80/* Don't default to pcc-struct-return, because gcc is the only compiler, and 81 we want to retain compatibility with older gcc versions. */ 82#define DEFAULT_PCC_STRUCT_RETURN 0 83 84/* Assembler format: alignment output. */ 85 86/* Kludgy test: when gas is upgraded, it will have p2align, and no problems 87 with nops. */ 88#ifndef HAVE_GAS_MAX_SKIP_P2ALIGN 89/* i386 OpenBSD still uses an older gas that doesn't insert nops by default 90 when the .align directive demands to insert extra space in the text 91 segment. */ 92#undef ASM_OUTPUT_ALIGN 93#define ASM_OUTPUT_ALIGN(FILE,LOG) \ 94 if ((LOG)!=0) fprintf ((FILE), "\t.align %d,0x90\n", (LOG)) 95#endif 96 97/* Stack & calling: profiling. */ 98 99/* OpenBSD's profiler recovers all information from the stack pointer. 100 The icky part is not here, but in machine/profile.h. */ 101#undef FUNCTION_PROFILER 102#define FUNCTION_PROFILER(FILE, LABELNO) \ 103 fputs (flag_pic ? "\tcall mcount@PLT\n": "\tcall mcount\n", FILE); 104 105/* Assembler format: exception region output. */ 106 107/* All configurations that don't use elf must be explicit about not using 108 dwarf unwind information. egcs doesn't try too hard to check internal 109 configuration files... */ 110#define DWARF2_UNWIND_INFO 0 111 112/* Assembler format: alignment output. */ 113 114/* A C statement to output to the stdio stream FILE an assembler 115 command to advance the location counter to a multiple of 1<<LOG 116 bytes if it is within MAX_SKIP bytes. 117 118 This will be used to align code labels according to Intel 119 recommendations, in prevision of binutils upgrade. */ 120#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN 121#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \ 122 do { \ 123 if ((LOG) != 0) \ 124 if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \ 125 else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \ 126 } while (0) 127#endif 128 129/* Note that we pick up ASM_OUTPUT_MI_THUNK from unix.h. */ 130 131