1 /* Default common target hook functions. 2 Copyright (C) 2003-2018 Free Software Foundation, Inc. 3 4 This file is part of GCC. 5 6 GCC is free software; you can redistribute it and/or modify it under 7 the terms of the GNU General Public License as published by the Free 8 Software Foundation; either version 3, or (at your option) any later 9 version. 10 11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 12 WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GCC; see the file COPYING3. If not see 18 <http://www.gnu.org/licenses/>. */ 19 20 #include "config.h" 21 #include "system.h" 22 #include "coretypes.h" 23 #include "tm.h" 24 #include "common/common-target.h" 25 #include "common/common-targhooks.h" 26 27 /* Determine the exception handling mechanism for the target. */ 28 29 enum unwind_info_type 30 default_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED) 31 { 32 /* Obey the configure switch to turn on sjlj exceptions. */ 33 #ifdef CONFIG_SJLJ_EXCEPTIONS 34 if (CONFIG_SJLJ_EXCEPTIONS) 35 return UI_SJLJ; 36 #endif 37 38 /* ??? Change all users to the hook, then poison this. */ 39 #ifdef DWARF2_UNWIND_INFO 40 if (DWARF2_UNWIND_INFO) 41 return UI_DWARF2; 42 #endif 43 44 return UI_SJLJ; 45 } 46 47 /* To be used by targets that force dwarf2 unwind enabled. */ 48 49 enum unwind_info_type 50 dwarf2_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED) 51 { 52 /* Obey the configure switch to turn on sjlj exceptions. */ 53 #ifdef CONFIG_SJLJ_EXCEPTIONS 54 if (CONFIG_SJLJ_EXCEPTIONS) 55 return UI_SJLJ; 56 #endif 57 58 return UI_DWARF2; 59 } 60 61 /* To be used by targets that force sjlj unwind enabled. */ 62 63 enum unwind_info_type 64 sjlj_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED) 65 { 66 return UI_SJLJ; 67 } 68 69 /* Default version of TARGET_HANDLE_OPTION. */ 70 71 bool 72 default_target_handle_option (struct gcc_options *opts ATTRIBUTE_UNUSED, 73 struct gcc_options *opts_set ATTRIBUTE_UNUSED, 74 const struct cl_decoded_option *decoded ATTRIBUTE_UNUSED, 75 location_t loc ATTRIBUTE_UNUSED) 76 { 77 return true; 78 } 79 80 const struct default_options empty_optimization_table[] = 81 { 82 { OPT_LEVELS_NONE, 0, NULL, 0 } 83 }; 84