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linux/arch/x86/boot/regs.c

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// SPDX-License-Identifier: GPL-2.0-or-later
/* -----------------------------------------------------------------------
*
* Copyright 2009 Intel Corporation; author H. Peter Anvin
*
* ----------------------------------------------------------------------- */
/*
* Simple helper function for initializing a register set.
*
* Note that this sets EFLAGS_CF in the input register set; this
* makes it easier to catch functions which do nothing but don't
* explicitly set CF.
*/
#include "boot.h"
#include "string.h"
void initregs(struct biosregs *reg)
{
memset(reg, 0, sizeof(*reg));
reg->eflags |= X86_EFLAGS_CF;
reg->ds = ds();
reg->es = ds();
reg->fs = fs();
reg->gs = gs();
}