1 /* 2 * This file is part of the coreboot project. 3 * 4 * Copyright (C) 2009 coresystems GmbH 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; version 2 or later of the License. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA 18 */ 19 20 #ifdef __GNUC__ 21 22 /* 23 * GCC's libgcc handling is quite broken. While the libgcc functions 24 * are always regparm(0) the code that calls them uses whatever the 25 * compiler call specifies. Therefore we need a wrapper around those 26 * functions. See gcc bug PR41055 for more information. 27 */ 28 #define WRAP_LIBGCC_CALL(type, name) \ 29 type __normal_##name(type a, type b) __attribute__((regparm(0))); \ 30 type __wrap_##name(type a, type b); \ 31 type __attribute__((no_instrument_function)) \ 32 __wrap_##name(type a, type b) \ 33 { return __normal_##name(a, b); } 34 35 WRAP_LIBGCC_CALL(long long, __divdi3) 36 WRAP_LIBGCC_CALL(unsigned long long, __udivdi3) 37 WRAP_LIBGCC_CALL(long long, __moddi3) 38 WRAP_LIBGCC_CALL(unsigned long long, __umoddi3) 39 40 #endif 41