freebsd.h revision 107599
1/* Definitions for Sun Sparc64 running FreeBSD using the ELF format 2 Copyright (C) 2001, 2002 Free Software Foundation, Inc. 3 Contributed by David E. O'Brien <obrien@FreeBSD.org> and BSDi. 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, 675 Mass Ave, Cambridge, MA 02139, USA. */ 20 21/* $FreeBSD: head/contrib/gcc/config/sparc/freebsd.h 107599 2002-12-04 16:09:42Z obrien $ */ 22 23/* FreeBSD needs the platform name (sparc64) defined. 24 Emacs needs to know if the arch is 64 or 32-bits. */ 25 26#undef CPP_CPU64_DEFAULT_SPEC 27#define CPP_CPU64_DEFAULT_SPEC "-D__sparc64__ -D__sparc_v9__ -D__arch64__" 28 29/* Because we include sparc/sysv4.h. */ 30#undef CPP_PREDEFINES 31#define CPP_PREDEFINES FBSD_CPP_PREDEFINES 32 33#define LINK_SPEC "%(link_arch) \ 34 %{!mno-relax:%{!r:-relax}} \ 35 %{p:%e`-p' not supported; use `-pg' and gprof(1)} \ 36 %{Wl,*:%*} \ 37 %{assert*} %{R*} %{rpath*} %{defsym*} \ 38 %{shared:-Bshareable %{h*} %{soname*}} \ 39 %{symbolic:-Bsymbolic} \ 40 %{!shared: \ 41 %{!static: \ 42 %{rdynamic:-export-dynamic} \ 43 %{!dynamic-linker:-dynamic-linker /usr/libexec/ld-elf.so.1}} \ 44 %{static:-Bstatic}}" 45 46 47/************************[ Target stuff ]***********************************/ 48 49/* Define the actual types of some ANSI-mandated types. 50 Needs to agree with <machine/ansi.h>. GCC defaults come from c-decl.c, 51 c-common.c, and config/<arch>/<arch>.h. */ 52 53/* Earlier headers may get this wrong for FreeBSD. 54 We use the GCC defaults instead. */ 55#undef WCHAR_TYPE 56 57#undef WCHAR_UNSIGNED 58#define WCHAR_UNSIGNED 0 59 60#undef WCHAR_TYPE_SIZE 61#define WCHAR_TYPE_SIZE 32 62 63/* Define for support of TFmode long double and REAL_ARITHMETIC. 64 Sparc ABI says that long double is 4 words. */ 65#undef LONG_DOUBLE_TYPE_SIZE 66#define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64) 67 68/* Constant which presents upper bound of the above value. */ 69#undef MAX_LONG_DOUBLE_TYPE_SIZE 70#define MAX_LONG_DOUBLE_TYPE_SIZE 128 71 72/* Define this to set long double type size to use in libgcc2.c, which can 73 not depend on target_flags. */ 74#if defined(__arch64__) || defined(__LONG_DOUBLE_128__) 75#define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128 76#else 77#define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64 78#endif 79 80/* Definitions for 64-bit SPARC running systems with ELF. */ 81 82#undef SUBTARGET_SWITCHES 83#define SUBTARGET_SWITCHES \ 84 {"long-double-64", -MASK_LONG_DOUBLE_128, N_("Use 64 bit long doubles") }, \ 85 {"long-double-128", MASK_LONG_DOUBLE_128, N_("Use 128 bit long doubles") }, 86 87#undef TARGET_VERSION 88#define TARGET_VERSION fprintf (stderr, " (FreeBSD/sparc64 ELF)"); 89 90#define TARGET_ELF 1 91 92/* XXX */ 93/* A 64 bit v9 compiler with stack-bias, 94 in a Medium/mid code model environment. */ 95 96#undef TARGET_DEFAULT 97#define TARGET_DEFAULT \ 98 (MASK_V9 + MASK_64BIT + MASK_PTR64 /* + MASK_FASTER_STRUCTS */ \ 99 + MASK_STACK_BIAS + MASK_APP_REGS + MASK_FPU \ 100 + MASK_LONG_DOUBLE_128 /* + MASK_HARD_QUAD */) 101 102/* The default code model. */ 103#undef SPARC_DEFAULT_CMODEL 104#define SPARC_DEFAULT_CMODEL CM_MEDLOW 105 106#define TRANSFER_FROM_TRAMPOLINE \ 107 static int need_enable_exec_stack; \ 108 static void check_enabling(void) __attribute__ ((constructor)); \ 109 static void check_enabling(void) \ 110 { \ 111 extern int sysctlbyname(const char *, void *, size_t *, void *, size_t);\ 112 int prot = 0; \ 113 size_t len = sizeof(prot); \ 114 \ 115 sysctlbyname ("kern.stackprot", &prot, &len, NULL, 0); \ 116 if (prot != 7) \ 117 need_enable_exec_stack = 1; \ 118 } \ 119 extern void __enable_execute_stack (void *); \ 120 void __enable_execute_stack (void *addr) \ 121 { \ 122 if (!need_enable_exec_stack) \ 123 return; \ 124 else { \ 125 /* 7 is PROT_READ | PROT_WRITE | PROT_EXEC */ \ 126 if (mprotect (addr, TRAMPOLINE_SIZE, 7) < 0) \ 127 perror ("mprotect of trampoline code"); \ 128 } \ 129 } 130 131 132/************************[ Assembler stuff ]********************************/ 133 134#undef LOCAL_LABEL_PREFIX 135#define LOCAL_LABEL_PREFIX "." 136 137/* XXX2 */ 138/* This is how to output a definition of an internal numbered label where 139 PREFIX is the class of label and NUM is the number within the class. */ 140 141#undef ASM_OUTPUT_INTERNAL_LABEL 142#define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM) \ 143 fprintf (FILE, ".L%s%d:\n", PREFIX, NUM) 144 145/* XXX2 */ 146/* This is how to output a reference to an internal numbered label where 147 PREFIX is the class of label and NUM is the number within the class. */ 148 149#undef ASM_OUTPUT_INTERNAL_LABELREF 150#define ASM_OUTPUT_INTERNAL_LABELREF(FILE,PREFIX,NUM) \ 151 fprintf (FILE, ".L%s%d", PREFIX, NUM) 152 153/* XXX2 */ 154/* This is how to store into the string LABEL 155 the symbol_ref name of an internal numbered label where 156 PREFIX is the class of label and NUM is the number within the class. 157 This is suitable for output with `assemble_name'. */ 158 159#undef ASM_GENERATE_INTERNAL_LABEL 160#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \ 161 sprintf (LABEL, "*.L%s%d", PREFIX, NUM) 162 163 164/************************[ Debugger stuff ]*********************************/ 165 166/* This is the char to use for continuation (in case we need to turn 167 continuation back on). */ 168 169#undef DBX_CONTIN_CHAR 170#define DBX_CONTIN_CHAR '?' 171 172/* DWARF bits. */ 173 174/* Follow Irix 6 and not the Dwarf2 draft in using 64-bit offsets. 175 Obviously the Dwarf2 folks havn't tried to actually build systems 176 with their spec. On a 64-bit system, only 64-bit relocs become 177 RELATIVE relocations. */ 178 179/* #define DWARF_OFFSET_SIZE PTR_SIZE */ 180 181#undef ENDFILE_SPEC 182#define ENDFILE_SPEC \ 183 "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s}" \ 184 FBSD_ENDFILE_SPEC 185 186/* We use GNU ld so undefine this so that attribute((init_priority)) works. */ 187#undef CTORS_SECTION_ASM_OP 188#undef DTORS_SECTION_ASM_OP 189