| 1 | ; $Id: d32hlp.asm,v 1.3 1999-10-31 23:57:02 bird Exp $
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| 2 | ;
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| 3 | ; d32hlp - 32-bit Device Driver Helper Function.
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| 4 | ;
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| 5 | ; Copyright (c) 1999 knut st. osmundsen
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| 6 | ;
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| 7 | ; Project Odin Software License can be found in LICENSE.TXT
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| 8 | ;
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| 9 | .386p
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| 10 |
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| 11 |
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| 12 | ;
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| 13 | ; Include files
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| 14 | ;
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| 15 | include devsegdf.inc
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| 16 | include devhlp.inc
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| 17 |
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| 18 | ;
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| 19 | ; Exported symbols
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| 20 | ;
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| 21 | public D32Hlp_VirtToLin
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| 22 | public D32Hlp_VirtToLin2
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| 23 | public D32Hlp_VirtToLin3
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| 24 | public D32Hlp_GetDOSVar
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| 25 | public D32Hlp_Yield
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| 26 | public D32Hlp_VMAlloc
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| 27 | public D32Hlp_VMFree
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| 28 | public D32Hlp_VMSetMem
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| 29 | public D32Hlp_VMLock
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| 30 | public D32Hlp_VMLock2
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| 31 | public D32Hlp_VMUnLock
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| 32 |
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| 33 | ;
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| 34 | ; extrns
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| 35 | ;
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| 36 | extrn _Device_Help:dword
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| 37 |
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| 38 | ;CODE32 segment
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| 39 | CODE32 segment dword public 'CODE' use32
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| 40 | assume cs:CODE32, ds:flat, ss:nothing, es:nothing
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| 41 | .386p
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| 42 |
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| 43 | ;PVOID D32HLPCALL D32Hlp_VirtToLin(ULONG ulPtr16); /* eax */
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| 44 | D32Hlp_VirtToLin proc near
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| 45 | push esi
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| 46 |
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| 47 | movzx esi, ax
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| 48 | shr eax, 16
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| 49 | mov dl, DevHlp_VirtToLin
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| 50 | jmp far ptr CODE16:Thunk16_VirtToLin
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| 51 | Thunk32_VirtToLin::
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| 52 | jnc Finished
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| 53 | xor eax, eax
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| 54 |
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| 55 | Finished:
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| 56 | pop esi
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| 57 | ret
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| 58 | D32Hlp_VirtToLin endp
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| 59 |
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| 60 |
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| 61 | ;PVOID D32HLPCALL D32Hlp_VirtToLin2(USHORT usSelector, /* ax */
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| 62 | ; ULONG ulOffset); /* edx */
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| 63 | D32Hlp_VirtToLin2 proc near
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| 64 | push esi
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| 65 |
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| 66 | mov esi, edx
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| 67 | mov dl, DevHlp_VirtToLin
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| 68 | jmp far ptr CODE16:Thunk16_VirtToLin2
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| 69 | Thunk32_VirtToLin2::
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| 70 | jnc Finished
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| 71 | xor eax, eax
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| 72 |
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| 73 | Finished:
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| 74 | pop esi
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| 75 | ret
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| 76 | D32Hlp_VirtToLin2 endp
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| 77 |
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| 78 |
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| 79 | ;D32RET D32HLPCALL D32Hlp_VirtToLin3(USHORT usSelector, /* ax */
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| 80 | ; ULONG ulOffset, /* edx */
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| 81 | ; PPVOID ppvLinAddress); /* ecx */
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| 82 | D32Hlp_VirtToLin3 proc near
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| 83 | push esi
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| 84 |
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| 85 | mov esi, edx
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| 86 | mov dl, DevHlp_VirtToLin
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| 87 | jmp far ptr CODE16:Thunk16_VirtToLin3
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| 88 | Thunk32_VirtToLin3::
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| 89 | jc Finished
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| 90 | mov [ecx], eax
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| 91 | xor eax, eax
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| 92 |
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| 93 | Finished:
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| 94 | pop esi
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| 95 | ret
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| 96 | D32Hlp_VirtToLin3 endp
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| 97 |
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| 98 |
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| 99 | ;PVOID D32HLPCALL D32Hlp_GetDOSVar(ULONG ulVarNumber, /* eax */
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| 100 | ; ULONG ulVarMember); /* edx */
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| 101 | D32Hlp_GetDOSVar proc near
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| 102 | push bx
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| 103 | mov ecx, edx
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| 104 | mov dl, DevHlp_GetDOSVar
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| 105 | jmp far ptr CODE16:Thunk16_GetDOSVar
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| 106 | Thunk32_GetDOSVar::
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| 107 | jc Error
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| 108 | shl ebx, 16
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| 109 | mov bx, ax
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| 110 | xchg eax, ebx
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| 111 | call D32Hlp_VirtToLin
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| 112 | jmp Finished
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| 113 |
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| 114 | Error:
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| 115 | xor eax, eax
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| 116 |
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| 117 | Finished:
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| 118 | pop bx
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| 119 | ret
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| 120 | D32Hlp_GetDOSVar endp
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| 121 |
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| 122 |
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| 123 | ;VOID D32HLPCALL D32Hlp_Yield(VOID);
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| 124 | D32Hlp_Yield proc near
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| 125 | mov dl, DevHlp_Yield
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| 126 | jmp far ptr CODE16:Thunk16_Yield
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| 127 | Thunk32_Yield::
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| 128 | ret
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| 129 | D32Hlp_Yield endp
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| 130 |
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| 131 |
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| 132 | ;PVOID D32HLPCALL D32Hlp_VMAlloc(ULONG flFlags, /* eax */
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| 133 | ; ULONG cbSize, /* edx */
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| 134 | ; ULONG ulPhysAddr);/* ecx */
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| 135 | D32Hlp_VMAlloc proc near
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| 136 | push edi
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| 137 |
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| 138 | mov edi, ecx
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| 139 | mov ecx, edx
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| 140 |
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| 141 | mov dl, DevHlp_VMAlloc
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| 142 | jmp far ptr CODE16:Thunk16_VMAlloc
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| 143 | Thunk32_VMAlloc::
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| 144 | jnc Finished
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| 145 | xor eax, eax
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| 146 |
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| 147 | Finished:
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| 148 | pop edi
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| 149 | ret
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| 150 | D32Hlp_VMAlloc endp
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| 151 |
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| 152 |
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| 153 | ;D32RET D32HLPCALL D32Hlp_VMFree(PVOID pvAddress); /* eax */
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| 154 | D32Hlp_VMFree proc near
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| 155 | mov dl, DevHlp_VMFree
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| 156 | jmp far ptr CODE16:Thunk16_VMFree
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| 157 | Thunk32_VMFree::
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| 158 | jc Finished
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| 159 | xor eax, eax
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| 160 | Finished:
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| 161 | ret
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| 162 | D32Hlp_VMFree endp
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| 163 |
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| 164 |
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| 165 | ;D32RET D32HLPCALL D32Hlp_VMSetMem(PVOID pvAddress, /* eax */
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| 166 | ; ULONG cbSize, /* edx */
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| 167 | ; ULONG flFlags); /* ecx */
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| 168 | D32Hlp_VMSetMem proc near
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| 169 | push ebx
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| 170 |
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| 171 | mov ebx, eax
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| 172 | mov eax, ecx
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| 173 | mov ecx, edx
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| 174 |
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| 175 | mov dl, DevHlp_VMSetMem
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| 176 | jmp far ptr CODE16:Thunk16_VMSetMem
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| 177 | Thunk32_VMSetMem::
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| 178 |
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| 179 | pop ebx
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| 180 | ret
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| 181 | D32Hlp_VMSetMem endp
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| 182 |
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| 183 |
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| 184 | ;D32RET D32HLPCALL D32Hlp_VMLock(PVOID pvAddress, /* eax (ebp + 08h) */
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| 185 | ; ULONG ulLength, /* edx (ebp + 0Ch)*/
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| 186 | ; ULONG flFlags, /* ecx (ebp + 10h)*/
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| 187 | ; PVOID pvPagelist, /* ebp + 14h */
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| 188 | ; PLOCKHANDLE pLockHandle, /* ebp + 18h */
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| 189 | ; PULONG pulPageListCount); /* ebp + 1Ch */
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| 190 | D32Hlp_VMLock proc near
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| 191 | push ebp
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| 192 | mov ebp, esp
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| 193 | push esi
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| 194 | push edi
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| 195 | push ebx
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| 196 |
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| 197 | mov edi, [ebp + 14h]
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| 198 | mov esi, [ebp + 18h]
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| 199 | mov ebx, eax
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| 200 | mov eax, ecx
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| 201 | mov ecx, edx
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| 202 |
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| 203 | mov dl, DevHlp_VMLock
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| 204 | jmp far ptr CODE16:Thunk16_VMLock
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| 205 | Thunk32_VMLock::
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| 206 | jc Finished
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| 207 | mov ebx, [ebp + 1Ch]
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| 208 | or ebx, ebx
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| 209 | jz Success
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| 210 | mov [ebx], eax
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| 211 |
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| 212 | Success:
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| 213 | xor eax, eax
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| 214 |
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| 215 | Finished:
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| 216 | pop ebx
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| 217 | pop edi
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| 218 | pop esi
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| 219 | pop ebp
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| 220 | ret
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| 221 | D32Hlp_VMLock endp
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| 222 |
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| 223 |
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| 224 | ;D32RET D32HLPCALL D32Hlp_VMLock2(PVOID pvAddress, /* eax (ebp + 08h) */
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| 225 | ; ULONG ulLength, /* edx (ebp + 0Ch)*/
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| 226 | ; ULONG flFlags, /* ecx (ebp + 10h)*/
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| 227 | ; PLOCKHANDLE pLockHandle); /* ebp + 14h */
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| 228 | D32Hlp_VMLock2 proc near
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| 229 | push ebp
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| 230 | mov ebp, esp
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| 231 | push esi
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| 232 | push edi
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| 233 | push ebx
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| 234 |
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| 235 | mov edi, 0ffffffffh
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| 236 | mov esi, [ebp + 14h]
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| 237 | mov ebx, eax
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| 238 | mov eax, ecx
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| 239 | mov ecx, edx
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| 240 |
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| 241 | mov dl, DevHlp_VMLock
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| 242 | jmp far ptr CODE16:Thunk16_VMLock2
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| 243 | Thunk32_VMLock2::
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| 244 | jc Finished
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| 245 | xor eax, eax
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| 246 |
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| 247 | Finished:
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| 248 | pop ebx
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| 249 | pop edi
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| 250 | pop esi
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| 251 | pop ebp
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| 252 | ret
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| 253 | D32Hlp_VMLock2 endp
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| 254 |
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| 255 |
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| 256 | ;D32RET D32HLPCALL D32Hlp_VMUnLock(PLOCKHANDLE pLockHandle); /* eax */
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| 257 | D32Hlp_VMUnLock proc near
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| 258 | push esi
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| 259 |
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| 260 | mov esi, eax
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| 261 | mov dl, DevHlp_VMUnlock
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| 262 | jmp far ptr CODE16:Thunk16_VMUnLock
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| 263 | Thunk32_VMUnLock::
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| 264 | jc Finished
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| 265 | xor eax, eax
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| 266 |
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| 267 | Finished:
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| 268 | pop esi
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| 269 | ret
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| 270 | D32Hlp_VMUnLock endp
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| 271 |
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| 272 | CODE32 ends
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| 273 |
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| 274 |
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| 275 |
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| 276 |
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| 277 |
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| 278 | ;CODE16 segment
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| 279 | CODE16 segment word public 'CODE' use16
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| 280 | assume cs:CODE16, ds:FLAT
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| 281 |
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| 282 | Thunk16_VirtToLin:
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| 283 | call [_Device_Help]
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| 284 | jmp far ptr FLAT:Thunk32_VirtToLin
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| 285 |
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| 286 | Thunk16_VirtToLin2:
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| 287 | call [_Device_Help]
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| 288 | jmp far ptr FLAT:Thunk32_VirtToLin2
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| 289 |
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| 290 | Thunk16_VirtToLin3:
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| 291 | call [_Device_Help]
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| 292 | jmp far ptr FLAT:Thunk32_VirtToLin3
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| 293 |
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| 294 | Thunk16_GetDOSVar:
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| 295 | call [_Device_Help]
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| 296 | jmp far ptr FLAT:Thunk32_GetDOSVar
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| 297 |
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| 298 | Thunk16_Yield:
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| 299 | call [_Device_Help]
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| 300 | jmp far ptr FLAT:Thunk32_Yield
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| 301 |
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| 302 | Thunk16_VMAlloc:
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| 303 | call [_Device_Help]
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| 304 | jmp far ptr FLAT:Thunk32_VMAlloc
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| 305 |
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| 306 | Thunk16_VMFree:
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| 307 | call [_Device_Help]
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| 308 | jmp far ptr FLAT:Thunk32_VMFree
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| 309 |
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| 310 | Thunk16_VMLock:
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| 311 | call [_Device_Help]
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| 312 | jmp far ptr FLAT:Thunk32_VMLock
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| 313 |
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| 314 | Thunk16_VMLock2:
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| 315 | call [_Device_Help]
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| 316 | jmp far ptr FLAT:Thunk32_VMLock2
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| 317 |
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| 318 | Thunk16_VMUnLock:
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| 319 | call [_Device_Help]
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| 320 | jmp far ptr FLAT:Thunk32_VMUnLock
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| 321 |
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| 322 | Thunk16_VMSetMem:
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| 323 | call [_Device_Help]
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| 324 | jmp far ptr FLAT:Thunk32_VMSetMem
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| 325 |
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| 326 | CODE16 ends
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| 327 | end
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