src/lib/gcc.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <arch/cpu.h>
   4
   5 /* GCC's libgcc handling is quite broken. While the libgcc functions
   6  * are always regparm(0) the code that calls them uses whatever the
   7  * compiler call specifies. Therefore we need a wrapper around those
   8  * functions. See gcc bug PR41055 for more information.
   9  */
  10
  11 /* TODO: maybe this code should move to arch/x86 as architecture
  12  * specific implementations may vary
  13  */
  14 #define WRAP_LIBGCC_CALL(type, name) \
  15         asmlinkage type __real_##name(type a, type b); \
  16         type __wrap_##name(type a, type b); \
  17         type __wrap_##name(type a, type b) { return __real_##name(a, b); }
  18
  19 WRAP_LIBGCC_CALL(long long, __divdi3)
  20 WRAP_LIBGCC_CALL(unsigned long long, __udivdi3)
  21 WRAP_LIBGCC_CALL(long long, __moddi3)
  22 WRAP_LIBGCC_CALL(unsigned long long, __umoddi3)