| 1 | ; $Id: bs3-mode-MemCopyFlat.asm 106061 2024-09-16 14:03:52Z vboxsync $
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| 2 | ;; @file
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| 3 | ; BS3Kit - Bs3MemCopyFlat
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| 4 | ;
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| 5 |
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| 6 | ;
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| 7 | ; Copyright (C) 2023-2024 Oracle and/or its affiliates.
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| 8 | ;
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| 9 | ; This file is part of VirtualBox base platform packages, as
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| 10 | ; available from https://www.virtualbox.org.
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| 11 | ;
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| 12 | ; This program is free software; you can redistribute it and/or
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| 13 | ; modify it under the terms of the GNU General Public License
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| 14 | ; as published by the Free Software Foundation, in version 3 of the
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| 15 | ; License.
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| 16 | ;
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| 17 | ; This program is distributed in the hope that it will be useful, but
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| 18 | ; WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | ; General Public License for more details.
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| 21 | ;
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| 22 | ; You should have received a copy of the GNU General Public License
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| 23 | ; along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | ;
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| 25 | ; The contents of this file may alternatively be used under the terms
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| 26 | ; of the Common Development and Distribution License Version 1.0
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| 27 | ; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | ; in the VirtualBox distribution, in which case the provisions of the
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| 29 | ; CDDL are applicable instead of those of the GPL.
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| 30 | ;
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| 31 | ; You may elect to license modified versions of this file under the
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| 32 | ; terms and conditions of either the GPL or the CDDL or both.
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| 33 | ;
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| 34 | ; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | ;
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| 36 |
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| 37 | ;*********************************************************************************************************************************
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| 38 | ;* Header Files *
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| 39 | ;*********************************************************************************************************************************
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| 40 | %include "bs3kit-template-header.mac"
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| 41 |
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| 42 |
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| 43 | ;*********************************************************************************************************************************
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| 44 | ;* External symbols *
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| 45 | ;*********************************************************************************************************************************
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| 46 | TMPL_BEGIN_TEXT
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| 47 | extern TMPL_NM(Bs3SwitchToRM)
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| 48 | BS3_BEGIN_TEXT16
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| 49 | extern RT_CONCAT3(_Bs3SwitchTo,TMPL_MODE_UNAME,_Safe_rm)
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| 50 |
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| 51 | BS3_EXTERN_DATA16 g_aBs3RmIvtOriginal
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| 52 | %ifdef TMPL_16BIT
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| 53 | extern NAME(Bs3SwitchTo32BitAndCallC_rm_far)
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| 54 | %else
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| 55 | BS3_EXTERN_CMN Bs3MemCpy
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| 56 | %endif
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| 57 |
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| 58 |
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| 59 |
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| 60 | ;;
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| 61 | ; Copies memory from/to real mode.
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| 62 | ;
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| 63 | ; ASSUMES 386+.
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| 64 | ;
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| 65 | ; @cproto BS3_MODE_PROTO_STUB(void BS3_FAR *, Bs3MemCopyFlat,(uint32_t uFlatDst, uint32_t uFlatSrc, uint32_t cbToCopy));
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| 66 | ;
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| 67 | TMPL_BEGIN_TEXT
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| 68 | BS3_PROC_BEGIN_MODE Bs3MemCopyFlat, BS3_PBC_HYBRID
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| 69 | %ifdef TMPL_64BIT
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| 70 | mov ecx, ecx
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| 71 | mov edx, edx
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| 72 | mov r8d, r8d
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| 73 | jmp Bs3MemCpy
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| 74 | %elifdef TMPL_32BIT
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| 75 | jmp Bs3MemCpy
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| 76 | %else
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| 77 | push xBP
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| 78 | mov xBP, xSP
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| 79 |
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| 80 | ; Just call Bs3SwitchTo32BitAndCallC w/ Bs3MemCpy_c32
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| 81 | push dword [xBP + xCB + cbCurRetAddr + 4 + 4]
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| 82 | push dword [xBP + xCB + cbCurRetAddr + 4]
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| 83 | push dword [xBP + xCB + cbCurRetAddr]
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| 84 | push word 4 * 3
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| 85 | push seg .copy32_bit_worker
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| 86 | push word .copy32_bit_worker
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| 87 | call far NAME(Bs3SwitchTo32BitAndCallC_rm_far)
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| 88 |
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| 89 | leave
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| 90 | BS3_HYBRID_RET
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| 91 |
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| 92 | BITS 32
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| 93 | .copy32_bit_worker:
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| 94 | push ebp
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| 95 | mov ebp, esp
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| 96 | push edi
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| 97 | push esi
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| 98 | push ecx
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| 99 |
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| 100 | mov edi, [ebp + 8]
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| 101 | mov esi, [ebp + 12]
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| 102 | mov ecx, [ebp + 16]
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| 103 | cld
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| 104 | rep movsb
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| 105 |
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| 106 | pop ecx
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| 107 | pop esi
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| 108 | pop edi
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| 109 | leave
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| 110 | ret
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| 111 | BITS 16
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| 112 | %endif
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| 113 | BS3_PROC_END_MODE Bs3MemCopyFlat
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| 114 |
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