freebsd.h revision 123546
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 123546 2003-12-15 10:34:01Z 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 \ 28 "-D__sparc64__ -D__sparc_v9__ -D__sparcv9 -D__sparc__ -D__arch64__" 29 30#undef FBSD_TARGET_CPU_CPP_BUILTINS 31#define FBSD_TARGET_CPU_CPP_BUILTINS() \ 32 do \ 33 { \ 34 builtin_define ("__LP64__"); \ 35 } \ 36 while (0) 37 38/* Because we include sparc/sysv4.h. */ 39#undef CPP_PREDEFINES 40/* Do not define it here, we now use TARGET_OS_CPP_BUILTINS. */ 41 42#define LINK_SPEC "%(link_arch) \ 43 %{!mno-relax:%{!r:-relax}} \ 44 %{p:%e`-p' not supported; use `-pg' and gprof(1)} \ 45 %{Wl,*:%*} \ 46 %{assert*} %{R*} %{rpath*} %{defsym*} \ 47 %{shared:-Bshareable %{h*} %{soname*}} \ 48 %{symbolic:-Bsymbolic} \ 49 %{!shared: \ 50 %{!static: \ 51 %{rdynamic:-export-dynamic} \ 52 %{!dynamic-linker:-dynamic-linker /libexec/ld-elf.so.1}} \ 53 %{static:-Bstatic}}" 54 55 56/************************[ Target stuff ]***********************************/ 57 58/* Define the actual types of some ANSI-mandated types. 59 Needs to agree with <machine/ansi.h>. GCC defaults come from c-decl.c, 60 c-common.c, and config/<arch>/<arch>.h. */ 61 62/* Earlier headers may get this wrong for FreeBSD. 63 We use the GCC defaults instead. */ 64#undef WCHAR_TYPE 65 66#undef WCHAR_TYPE_SIZE 67#define WCHAR_TYPE_SIZE 32 68 69/* Define for support of TFmode long double. 70 SPARC ABI says that long double is 4 words. */ 71#undef LONG_DOUBLE_TYPE_SIZE 72#define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64) 73 74/* Constant which presents upper bound of the above value. */ 75#undef MAX_LONG_DOUBLE_TYPE_SIZE 76#define MAX_LONG_DOUBLE_TYPE_SIZE 128 77 78/* Define this to set long double type size to use in libgcc2.c, which can 79 not depend on target_flags. */ 80#if defined(__arch64__) || defined(__LONG_DOUBLE_128__) 81#define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128 82#else 83#define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64 84#endif 85 86/* Definitions for 64-bit SPARC running systems with ELF. */ 87 88#undef SUBTARGET_SWITCHES 89#define SUBTARGET_SWITCHES \ 90 {"long-double-64", -MASK_LONG_DOUBLE_128, N_("Use 64 bit long doubles") }, \ 91 {"long-double-128", MASK_LONG_DOUBLE_128, N_("Use 128 bit long doubles") }, 92 93#undef TARGET_VERSION 94#define TARGET_VERSION fprintf (stderr, " (FreeBSD/sparc64 ELF)"); 95 96#define TARGET_ELF 1 97 98/* XXX */ 99/* A 64 bit v9 compiler with stack-bias, 100 in a Medium/mid code model environment. */ 101 102#undef TARGET_DEFAULT 103#define TARGET_DEFAULT \ 104 (MASK_V9 + MASK_64BIT + MASK_PTR64 /* + MASK_FASTER_STRUCTS */ \ 105 + MASK_STACK_BIAS + MASK_APP_REGS + MASK_FPU \ 106 + MASK_LONG_DOUBLE_128 /* + MASK_HARD_QUAD */) 107 108/* The default code model. */ 109#undef SPARC_DEFAULT_CMODEL 110#define SPARC_DEFAULT_CMODEL CM_MEDLOW 111 112#define TRANSFER_FROM_TRAMPOLINE \ 113 static int need_enable_exec_stack; \ 114 static void check_enabling(void) __attribute__ ((constructor)); \ 115 static void check_enabling(void) \ 116 { \ 117 extern int sysctlbyname(const char *, void *, size_t *, void *, size_t);\ 118 int prot = 0; \ 119 size_t len = sizeof(prot); \ 120 \ 121 sysctlbyname ("kern.stackprot", &prot, &len, NULL, 0); \ 122 if (prot != 7) \ 123 need_enable_exec_stack = 1; \ 124 } \ 125 extern void __enable_execute_stack (void *); \ 126 void __enable_execute_stack (void *addr) \ 127 { \ 128 if (!need_enable_exec_stack) \ 129 return; \ 130 else { \ 131 /* 7 is PROT_READ | PROT_WRITE | PROT_EXEC */ \ 132 if (mprotect (addr, TRAMPOLINE_SIZE, 7) < 0) \ 133 perror ("mprotect of trampoline code"); \ 134 } \ 135 } 136 137 138/************************[ Assembler stuff ]********************************/ 139 140#undef LOCAL_LABEL_PREFIX 141#define LOCAL_LABEL_PREFIX "." 142 143/* XXX2 */ 144/* This is how to output a definition of an internal numbered label where 145 PREFIX is the class of label and NUM is the number within the class. */ 146 147#undef ASM_OUTPUT_INTERNAL_LABEL 148#define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM) \ 149 fprintf (FILE, ".L%s%d:\n", PREFIX, NUM) 150 151/* XXX2 */ 152/* This is how to output a reference to an internal numbered label where 153 PREFIX is the class of label and NUM is the number within the class. */ 154 155#undef ASM_OUTPUT_INTERNAL_LABELREF 156#define ASM_OUTPUT_INTERNAL_LABELREF(FILE,PREFIX,NUM) \ 157 fprintf (FILE, ".L%s%d", PREFIX, NUM) 158 159/* XXX2 */ 160/* This is how to store into the string LABEL 161 the symbol_ref name of an internal numbered label where 162 PREFIX is the class of label and NUM is the number within the class. 163 This is suitable for output with `assemble_name'. */ 164 165#undef ASM_GENERATE_INTERNAL_LABEL 166#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \ 167 sprintf (LABEL, "*.L%s%d", PREFIX, NUM) 168 169 170/************************[ Debugger stuff ]*********************************/ 171 172/* This is the char to use for continuation (in case we need to turn 173 continuation back on). */ 174 175#undef DBX_CONTIN_CHAR 176#define DBX_CONTIN_CHAR '?' 177 178/* DWARF bits. */ 179 180/* Follow Irix 6 and not the Dwarf2 draft in using 64-bit offsets. 181 Obviously the Dwarf2 folks havn't tried to actually build systems 182 with their spec. On a 64-bit system, only 64-bit relocs become 183 RELATIVE relocations. */ 184 185/* #define DWARF_OFFSET_SIZE PTR_SIZE */ 186 187#undef ENDFILE_SPEC 188#define ENDFILE_SPEC \ 189 "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s}" \ 190 FBSD_ENDFILE_SPEC 191 192/* We use GNU ld so undefine this so that attribute((init_priority)) works. */ 193#undef CTORS_SECTION_ASM_OP 194#undef DTORS_SECTION_ASM_OP 195