src/lib/gcc.c

   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
  16 #include <arch/cpu.h>
  17
  18 /* GCC's libgcc handling is quite broken. While the libgcc functions
  19  * are always regparm(0) the code that calls them uses whatever the
  20  * compiler call specifies. Therefore we need a wrapper around those
  21  * functions. See gcc bug PR41055 for more information.
  22  */
  23
  24 /* TODO: maybe this code should move to arch/x86 as architecture
  25  * specific implementations may vary
  26  */
  27 #define WRAP_LIBGCC_CALL(type, name) \
  28         asmlinkage type __real_##name(type a, type b); \
  29         type __wrap_##name(type a, type b); \
  30         type __wrap_##name(type a, type b) { return __real_##name(a, b); }
  31
  32 WRAP_LIBGCC_CALL(long long, __divdi3)
  33 WRAP_LIBGCC_CALL(unsigned long long, __udivdi3)
  34 WRAP_LIBGCC_CALL(long long, __moddi3)
  35 WRAP_LIBGCC_CALL(unsigned long long, __umoddi3)