diff options
| author | Stefan Roese <sr@denx.de> | 2017-11-29 16:23:31 +0100 |
|---|---|---|
| committer | Bin Meng <bmeng.cn@gmail.com> | 2017-11-30 13:50:17 +0800 |
| commit | aa7839b39c2ee77f9ab8c393c56b8d812507dbb7 (patch) | |
| tree | 91fd2e12c9c27d1fdc303af9b92076fc9a8e8860 /arch/x86/lib/gcc.c | |
| parent | a53fbf4046c5ec5b4ca1bdd812416a9d45558f0a (diff) | |
x86: lib: Implement standalone __udivdi3 etc instead of libgcc ones
This patch removes the inclusion of the libgcc math functions and
replaces them by functions coded in C, taken from the coreboot
project. This makes U-Boot building more independent from the toolchain
installed / available on the build system.
The code taken from coreboot is authored from Vadim Bendebury
<vbendeb@chromium.org> on 2014-11-28 and committed with commit
ID e63990ef [libpayload: provide basic 64bit division implementation]
(coreboot git repository located here [1]).
I modified the code so that its checkpatch clean without any
functional changes.
[1] git://github.com/coreboot/coreboot.git
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Cc: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'arch/x86/lib/gcc.c')
| -rw-r--r-- | arch/x86/lib/gcc.c | 29 |
1 files changed, 0 insertions, 29 deletions
diff --git a/arch/x86/lib/gcc.c b/arch/x86/lib/gcc.c deleted file mode 100644 index 3c70d790d49..00000000000 --- a/arch/x86/lib/gcc.c +++ /dev/null @@ -1,29 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright (C) 2009 coresystems GmbH - * - * SPDX-License-Identifier: GPL-2.0 - */ - -#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 |