coreboot/src/lib/gcc.c
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   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 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/* GCC's libgcc handling is quite broken. While the libgcc functions
  21 * are always regparm(0) the code that calls them uses whatever the
  22 * compiler call specifies. Therefore we need a wrapper around those
  23 * functions. See gcc bug PR41055 for more information.
  24 */
  25#define WRAP_LIBGCC_CALL(type, name) \
  26        type __real_##name(type a, type b) __attribute__((regparm(0))); \
  27        type __wrap_##name(type a, type b); \
  28        type __wrap_##name(type a, type b) { return __real_##name(a, b); }
  29
  30WRAP_LIBGCC_CALL(long long, __divdi3)
  31WRAP_LIBGCC_CALL(unsigned long long, __udivdi3)
  32WRAP_LIBGCC_CALL(long long, __moddi3)
  33WRAP_LIBGCC_CALL(unsigned long long, __umoddi3)
  34
  35
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