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Diffstat (limited to '')
-rw-r--r-- | src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-RegCtxGetRspSsAsCurPtr.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-RegCtxGetRspSsAsCurPtr.c b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-RegCtxGetRspSsAsCurPtr.c new file mode 100644 index 00000000..5f36e2b1 --- /dev/null +++ b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-RegCtxGetRspSsAsCurPtr.c @@ -0,0 +1,71 @@ +/* $Id: bs3-cmn-RegCtxGetRspSsAsCurPtr.c $ */ +/** @file + * BS3Kit - Bs3RegCtxGetRspSsAsCurPtr + */ + +/* + * Copyright (C) 2007-2023 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * 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, in version 3 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, see <https://www.gnu.org/licenses>. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included + * in the VirtualBox distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + * + * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include "bs3kit-template-header.h" + + +#undef Bs3RegCtxGetRspSsAsCurPtr +BS3_CMN_DEF(void BS3_FAR *, Bs3RegCtxGetRspSsAsCurPtr,(PBS3REGCTX pRegCtx)) +{ + uint64_t uFlat; + if (BS3_MODE_IS_RM_OR_V86(pRegCtx->bMode)) + { +#if ARCH_BITS == 16 + if (BS3_MODE_IS_RM_OR_V86(g_bBs3CurrentMode)) + return BS3_FP_MAKE(pRegCtx->ss, pRegCtx->rsp.u16); +#endif + uFlat = ((uint32_t)pRegCtx->ss << 4) + pRegCtx->rsp.u16; + } + else if (!BS3_MODE_IS_64BIT_CODE(pRegCtx->bMode)) + uFlat = Bs3SelFar32ToFlat32(pRegCtx->rsp.u32, pRegCtx->ss); + else + uFlat = pRegCtx->rsp.u64; + +#if ARCH_BITS == 16 + if (uFlat >= (BS3_MODE_IS_RM_OR_V86(g_bBs3CurrentMode) ? _1M : BS3_SEL_TILED_AREA_SIZE)) + return NULL; + return BS3_FP_MAKE(Bs3Sel16HighFlatPtrToSelector((uint32_t)uFlat >> 16), (uint16_t)uFlat); +#else + /* Typically no need to check limit in 32-bit mode, because 64-bit mode + just repeats the first 4GB for the rest of the address space. */ + return (void *)(uintptr_t)uFlat; +#endif +} + |