u-boot/arch/x86/lib/gcc.c
Simon Glass d8819f94d5 x86: Support tracing function
Some changes are needed to x86 timer functions to support tracing. Add
these so that the feature works correctly.

Signed-off-by: Simon Glass <sjg@chromium.org>
2013-06-26 10:18:56 -04:00

40 lines
1.5 KiB
C

/*
* 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