1 /* Definitions for Sun SPARC64 running FreeBSD using the ELF format 2 Copyright (C) 2001, 2002, 2004, 2005, 2006 Free Software Foundation, Inc. 3 Contributed by David E. O'Brien <obrien@FreeBSD.org> and BSDi. 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 /* $FreeBSD$ */ 23 24 #undef SUBTARGET_EXTRA_SPECS 25 #define SUBTARGET_EXTRA_SPECS \ 26 { "fbsd_dynamic_linker", FBSD_DYNAMIC_LINKER } 27 28 /* FreeBSD needs the platform name (sparc64) defined. 29 Emacs needs to know if the arch is 64 or 32-bits. 30 This also selects which targets are available via -mcpu. */ 31 32 #undef FBSD_TARGET_CPU_CPP_BUILTINS 33 #define FBSD_TARGET_CPU_CPP_BUILTINS() \ 34 do \ 35 { \ 36 builtin_define ("__LP64__"); \ 37 builtin_define ("__sparc64__"); \ 38 builtin_define ("__sparc_v9__"); \ 39 builtin_define ("__sparcv9"); \ 40 builtin_define ("__sparc__"); \ 41 builtin_define ("__arch64__"); \ 42 } \ 43 while (0) 44 45 #define LINK_SPEC "%(link_arch) \ 46 %{!mno-relax:%{!r:-relax}} \ 47 %{p:%nconsider using `-pg' instead of `-p' with gprof(1)} \ 48 %{v:-V} \ 49 %{assert*} %{R*} %{rpath*} %{defsym*} \ 50 %{shared:-Bshareable %{h*} %{soname*}} \ 51 %{!shared: \ 52 %{!static: \ 53 %{rdynamic:-export-dynamic} \ 54 %{!dynamic-linker:-dynamic-linker %(fbsd_dynamic_linker) }} \ 55 %{static:-Bstatic}} \ 56 %{!static:--hash-style=both --enable-new-dtags} \ 57 %{symbolic:-Bsymbolic}" 58 59 60 /************************[ Target stuff ]***********************************/ 61 62 /* Define the actual types of some ANSI-mandated types. 63 Needs to agree with <machine/ansi.h>. GCC defaults come from c-decl.c, 64 c-common.c, and config/<arch>/<arch>.h. */ 65 66 /* Earlier headers may get this wrong for FreeBSD. 67 We use the GCC defaults instead. */ 68 #undef WCHAR_TYPE 69 70 #undef WCHAR_TYPE_SIZE 71 #define WCHAR_TYPE_SIZE 32 72 73 /* Define for support of TFmode long double. 74 SPARC ABI says that long double is 4 words. */ 75 #undef LONG_DOUBLE_TYPE_SIZE 76 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64) 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 TARGET_VERSION 89 #define TARGET_VERSION fprintf (stderr, " (FreeBSD/sparc64 ELF)"); 90 91 #define TARGET_ELF 1 92 93 /* XXX */ 94 /* A 64 bit v9 compiler with stack-bias, 95 in a Medium/mid code model environment. */ 96 97 #undef TARGET_DEFAULT 98 #define TARGET_DEFAULT \ 99 (MASK_V9 + MASK_64BIT + MASK_PTR64 /* + MASK_FASTER_STRUCTS */ \ 100 + MASK_STACK_BIAS + MASK_APP_REGS + MASK_FPU \ 101 + MASK_LONG_DOUBLE_128 /* + MASK_HARD_QUAD */) 102 103 /* The default code model. */ 104 #undef SPARC_DEFAULT_CMODEL 105 #define SPARC_DEFAULT_CMODEL CM_MEDLOW 106 107 #define ENABLE_EXECUTE_STACK \ 108 static int need_enable_exec_stack; \ 109 static void check_enabling(void) __attribute__ ((constructor)); \ 110 static void check_enabling(void) \ 111 { \ 112 extern int sysctlbyname(const char *, void *, size_t *, void *, size_t);\ 113 int prot = 0; \ 114 size_t len = sizeof(prot); \ 115 \ 116 sysctlbyname ("kern.stackprot", &prot, &len, NULL, 0); \ 117 if (prot != 7) \ 118 need_enable_exec_stack = 1; \ 119 } \ 120 extern void __enable_execute_stack (void *); \ 121 void __enable_execute_stack (void *addr) \ 122 { \ 123 if (!need_enable_exec_stack) \ 124 return; \ 125 else { \ 126 /* 7 is PROT_READ | PROT_WRITE | PROT_EXEC */ \ 127 if (mprotect (addr, TRAMPOLINE_SIZE, 7) < 0) \ 128 perror ("mprotect of trampoline code"); \ 129 } \ 130 } 131 132 133 /************************[ Assembler stuff ]********************************/ 134 135 #undef LOCAL_LABEL_PREFIX 136 #define LOCAL_LABEL_PREFIX "." 137 138 /* XXX2 */ 139 /* This is how to store into the string LABEL 140 the symbol_ref name of an internal numbered label where 141 PREFIX is the class of label and NUM is the number within the class. 142 This is suitable for output with `assemble_name'. */ 143 144 #undef ASM_GENERATE_INTERNAL_LABEL 145 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \ 146 sprintf (LABEL, "*.L%s%lu", PREFIX, (unsigned long)(NUM)) 147 148 149 /************************[ Debugger stuff ]*********************************/ 150 151 /* This is the char to use for continuation (in case we need to turn 152 continuation back on). */ 153 154 #undef DBX_CONTIN_CHAR 155 #define DBX_CONTIN_CHAR '?' 156 157 /* DWARF bits. */ 158 159 /* Follow Irix 6 and not the Dwarf2 draft in using 64-bit offsets. 160 Obviously the Dwarf2 folks havn't tried to actually build systems 161 with their spec. On a 64-bit system, only 64-bit relocs become 162 RELATIVE relocations. */ 163 164 /* #define DWARF_OFFSET_SIZE PTR_SIZE */ 165 166 #ifdef HAVE_AS_TLS 167 #undef TARGET_SUN_TLS 168 #undef TARGET_GNU_TLS 169 #define TARGET_SUN_TLS 0 170 #define TARGET_GNU_TLS 1 171 #endif 172 173 #undef ENDFILE_SPEC 174 #define ENDFILE_SPEC \ 175 "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} " \ 176 FBSD_ENDFILE_SPEC 177 178 /* We use GNU ld so undefine this so that attribute((init_priority)) works. */ 179 #undef CTORS_SECTION_ASM_OP 180 #undef DTORS_SECTION_ASM_OP 181