1 /* Configuration for an OpenBSD i386 target. 2 3 Copyright (C) 2005 Free Software Foundation, Inc. 4 5 This file is part of GCC. 6 7 GCC is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 2, or (at your option) 10 any later version. 11 12 GCC is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GCC; see the file COPYING. If not, write to 19 the Free Software Foundation, 51 Franklin Street, Fifth Floor, 20 Boston, MA 02110-1301, USA. */ 21 22 /* This gets defined in tm.h->linux.h->svr4.h, and keeps us from using 23 libraries compiled with the native cc, so undef it. */ 24 #undef NO_DOLLAR_IN_LABEL 25 26 /* Override the default comment-starter of "/". */ 27 #undef ASM_COMMENT_START 28 #define ASM_COMMENT_START "#" 29 30 #undef DBX_REGISTER_NUMBER 31 #define DBX_REGISTER_NUMBER(n) svr4_dbx_register_map[n] 32 33 /* This goes away when the math-emulator is fixed */ 34 #undef TARGET_DEFAULT 35 #define TARGET_DEFAULT \ 36 (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_NO_FANCY_MATH_387) 37 38 /* Run-time target specifications */ 39 40 #define TARGET_OS_CPP_BUILTINS() \ 41 do \ 42 { \ 43 OPENBSD_OS_CPP_BUILTINS(); \ 44 } \ 45 while (0) 46 47 /* As an elf system, we need crtbegin/crtend stuff. */ 48 #undef STARTFILE_SPEC 49 #define STARTFILE_SPEC "\ 50 %{!shared: %{pg:gcrt0%O%s} %{!pg:%{p:gcrt0%O%s} %{!p:crt0%O%s}} \ 51 crtbegin%O%s} %{shared:crtbeginS%O%s}" 52 #undef ENDFILE_SPEC 53 #define ENDFILE_SPEC "%{!shared:crtend%O%s} %{shared:crtendS%O%s}" 54 55 /* Layout of source language data types. */ 56 57 /* This must agree with <machine/ansi.h> */ 58 #undef SIZE_TYPE 59 #define SIZE_TYPE "unsigned int" 60 61 #undef PTRDIFF_TYPE 62 #define PTRDIFF_TYPE "int" 63 64 #undef WCHAR_TYPE 65 #define WCHAR_TYPE "int" 66 67 #undef WCHAR_TYPE_SIZE 68 #define WCHAR_TYPE_SIZE BITS_PER_WORD 69 70 /* Assembler format: overall framework. */ 71 72 #undef ASM_APP_ON 73 #define ASM_APP_ON "#APP\n" 74 75 #undef ASM_APP_OFF 76 #define ASM_APP_OFF "#NO_APP\n" 77 78 #undef SET_ASM_OP 79 #define SET_ASM_OP "\t.set\t" 80 81 /* The following macros were originally stolen from i386v4.h. 82 These have to be defined to get PIC code correct. */ 83 84 /* Assembler format: dispatch tables. */ 85 86 /* Assembler format: sections. */ 87 88 /* Stack & calling: aggregate returns. */ 89 90 /* Don't default to pcc-struct-return, because gcc is the only compiler, and 91 we want to retain compatibility with older gcc versions. */ 92 #define DEFAULT_PCC_STRUCT_RETURN 0 93 94 /* Assembler format: alignment output. */ 95 96 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN 97 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \ 98 if ((LOG) != 0) {\ 99 if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \ 100 else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \ 101 } 102 #endif 103 104 /* Stack & calling: profiling. */ 105 106 /* OpenBSD's profiler recovers all information from the stack pointer. 107 The icky part is not here, but in machine/profile.h. */ 108 #undef FUNCTION_PROFILER 109 #define FUNCTION_PROFILER(FILE, LABELNO) \ 110 fputs (flag_pic ? "\tcall __mcount@PLT\n": "\tcall __mcount\n", FILE); 111 112 /* Assembler format: exception region output. */ 113 114 /* our configuration still doesn't handle dwarf2 correctly */ 115 #define DWARF2_UNWIND_INFO 0 116 117 /* Assembler format: alignment output. */ 118 119 /* Note that we pick up ASM_OUTPUT_MAX_SKIP_ALIGN from i386/gas.h */ 120 121 /* Note that we pick up ASM_OUTPUT_MI_THUNK from unix.h. */ 122 123 #undef LINK_SPEC 124 #define LINK_SPEC \ 125 "%{!shared:%{!nostdlib:%{!r*:%{!e*:-e __start}}}} \ 126 %{shared:-shared} %{R*} \ 127 %{static:-Bstatic} \ 128 %{!static:-Bdynamic} \ 129 %{assert*} \ 130 %{!dynamic-linker:-dynamic-linker /usr/libexec/ld.so}" 131 132 #define OBSD_HAS_CORRECT_SPECS 133