diff options
Diffstat (limited to 'arch/x86/lib/gcc.c')
| -rw-r--r-- | arch/x86/lib/gcc.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/x86/lib/gcc.c b/arch/x86/lib/gcc.c new file mode 100644 index 0000000..497ad75 --- /dev/null +++ b/arch/x86/lib/gcc.c @@ -0,0 +1,40 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2009 coresystems GmbH + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 or later of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA + */ + +#ifdef __GNUC__ + +/* + * GCC's libgcc handling is quite broken. While the libgcc functions + * are always regparm(0) the code that calls them uses whatever the + * compiler call specifies. Therefore we need a wrapper around those + * functions. See gcc bug PR41055 for more information. + */ +#define WRAP_LIBGCC_CALL(type, name) \ + type __normal_##name(type a, type b) __attribute__((regparm(0))); \ + type __wrap_##name(type a, type b); \ + type __attribute__((no_instrument_function)) \ + __wrap_##name(type a, type b) \ + { return __normal_##name(a, b); } + +WRAP_LIBGCC_CALL(long long, __divdi3) +WRAP_LIBGCC_CALL(unsigned long long, __udivdi3) +WRAP_LIBGCC_CALL(long long, __moddi3) +WRAP_LIBGCC_CALL(unsigned long long, __umoddi3) + +#endif |
