From aa7839b39c2ee77f9ab8c393c56b8d812507dbb7 Mon Sep 17 00:00:00 2001 From: Stefan Roese Date: Wed, 29 Nov 2017 16:23:31 +0100 Subject: 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 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 Cc: Simon Glass Cc: Bin Meng Reviewed-by: Bin Meng Tested-by: Bin Meng --- arch/x86/lib/gcc.c | 29 ----------------------------- 1 file changed, 29 deletions(-) delete mode 100644 arch/x86/lib/gcc.c (limited to 'arch/x86/lib/gcc.c') 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 -- cgit v1.2.3