| 1 | ; $Id: exceptutil.asm,v 1.26 2004-01-20 13:41:11 sandervl Exp $
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| 2 |
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| 3 | ;/*
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| 4 | ; * Project Odin Software License can be found in LICENSE.TXT
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| 5 | ; * Win32 Exception handling + misc functions for OS/2
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| 6 | ; *
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| 7 | ; * Copyright 1998 Sander van Leeuwen
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| 8 | ; *
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| 9 | ; */
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| 10 | .386p
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| 11 | NAME except
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| 12 |
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| 13 | DATA32 segment dword use32 public 'DATA'
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| 14 | DATA32 ends
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| 15 | CONST32_RO segment dword use32 public 'CONST'
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| 16 | CONST32_RO ends
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| 17 | BSS32 segment dword use32 public 'BSS'
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| 18 | BSS32 ends
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| 19 | DGROUP group BSS32, DATA32
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| 20 | assume cs:FLAT, ds:FLAT, ss:FLAT, es:FLAT
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| 21 |
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| 22 | DATA32 segment dword use32 public 'DATA'
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| 23 |
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| 24 | CONST32_RO segment
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| 25 | align 04h
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| 26 | @CBE8 db "KERNEL32: Calling handle"
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| 27 | db "r at %p code=%lx flags=%"
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| 28 | db "lx",0ah,0h
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| 29 | @CBE9 db "KERNEL32: Handler return"
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| 30 | db "ed %lx",0ah,0h
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| 31 | CONST32_RO ends
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| 32 | DATA32 ends
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| 33 |
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| 34 | CODE32 SEGMENT DWORD PUBLIC USE32 'CODE'
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| 35 |
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| 36 |
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| 37 | public _RaiseException@16
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| 38 | extrn _OS2RaiseException : near
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| 39 |
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| 40 | _RaiseException@16 proc near
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| 41 |
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| 42 | ifdef __GNUC__
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| 43 | ; _OS2RaiseException is _cdecl
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| 44 |
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| 45 | push ebp
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| 46 | mov ebp, esp
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| 47 | push eax
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| 48 |
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| 49 | mov eax, 0
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| 50 | mov eax, ss
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| 51 | push eax
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| 52 | mov eax, gs
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| 53 | push eax
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| 54 | mov eax, fs
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| 55 | push eax
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| 56 | mov eax, es
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| 57 | push eax
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| 58 | mov eax, ds
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| 59 | push eax
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| 60 | mov eax, cs
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| 61 | push cs
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| 62 | push esi
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| 63 | push edi
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| 64 | push edx
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| 65 | push ecx
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| 66 | push ebx
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| 67 | push dword ptr [ebp-4] ; original eax
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| 68 | pushfd
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| 69 | push dword ptr [ebp] ; original ebp
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| 70 | push ebp
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| 71 | add dword ptr [esp], 4 ; original esp
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| 72 | push dword ptr [ebp + 4] ; original eip (return address)
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| 73 |
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| 74 | push dword ptr [ebp + 20] ; arg 4 (DWORD *lpArguments)
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| 75 | push dword ptr [ebp + 16] ; arg 3 (DWORD cArguments)
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| 76 | push dword ptr [ebp + 12] ; arg 2 (DWORD dwExceptionFlags)
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| 77 | push dword ptr [ebp + 8] ; arg 1 (DWORD dwExceptionCode)
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| 78 |
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| 79 | call _OS2RaiseException
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| 80 |
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| 81 | add esp, 20 * 4
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| 82 |
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| 83 | pop eax
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| 84 | pop ebp
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| 85 | else
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| 86 | ; _OS2RaiseException _Pascal
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| 87 | push dword ptr [esp+4] ;DWORD dwExceptionCode
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| 88 | push dword ptr [esp+12] ;DWORD dwExceptionFlags
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| 89 | push dword ptr [esp+20] ;DWORD cArguments
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| 90 | push dword ptr [esp+28] ;DWORD *lpArguments
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| 91 | push dword ptr [esp+16] ;return address
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| 92 | push esp
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| 93 | add dword ptr [esp], 20
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| 94 | push ebp
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| 95 | pushfd
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| 96 | push eax
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| 97 | push ebx
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| 98 | push ecx
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| 99 | push edx
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| 100 | push edi
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| 101 | push esi
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| 102 | xor eax, eax
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| 103 | mov eax, cs
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| 104 | push eax
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| 105 | mov eax, ds
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| 106 | push eax
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| 107 | mov eax, es
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| 108 | push eax
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| 109 | mov eax, fs
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| 110 | push eax
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| 111 | mov eax, gs
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| 112 | push eax
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| 113 | mov eax, ss
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| 114 | push eax
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| 115 | call _OS2RaiseException
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| 116 | endif
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| 117 |
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| 118 | ret 16 ;__stdcall
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| 119 |
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| 120 | _RaiseException@16 endp
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| 121 |
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| 122 |
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| 123 | public _RtlUnwind@16
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| 124 | extrn _OS2RtlUnwind : near
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| 125 |
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| 126 | _RtlUnwind@16 proc near
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| 127 |
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| 128 | ifdef __GNUC__
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| 129 | ; OS2RtlUnwind is _cdecl
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| 130 |
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| 131 | push ebp
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| 132 | mov ebp, esp
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| 133 | push eax
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| 134 |
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| 135 | mov eax, 0
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| 136 | mov eax, ss
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| 137 | push eax
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| 138 | mov eax, gs
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| 139 | push eax
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| 140 | mov eax, fs
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| 141 | push eax
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| 142 | mov eax, es
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| 143 | push eax
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| 144 | mov eax, ds
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| 145 | push eax
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| 146 | mov eax, cs
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| 147 | push cs
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| 148 | push esi
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| 149 | push edi
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| 150 | push edx
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| 151 | push ecx
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| 152 | push ebx
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| 153 | push dword ptr [ebp-4] ; original eax
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| 154 | pushfd
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| 155 | push dword ptr [ebp] ; original ebp
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| 156 | push ebp
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| 157 | add dword ptr [esp], 4 ; original esp
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| 158 | push dword ptr [ebp + 4] ; original eip (return address)
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| 159 |
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| 160 | push dword ptr [ebp + 20] ; arg 4 (DWORD returnEax)
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| 161 | push dword ptr [ebp + 16] ; arg 3 (PWINEXCEPTION_RECORD pRecord)
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| 162 | push dword ptr [ebp + 12] ; arg 2 (LPVOID unusedEip)
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| 163 | push dword ptr [ebp + 8] ; arg 1 (PWINEXCEPTION_FRAME pEndFrame)
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| 164 |
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| 165 | call _OS2RtlUnwind
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| 166 |
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| 167 | add esp, 20 * 4
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| 168 |
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| 169 | pop eax
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| 170 | pop ebp
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| 171 | else
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| 172 | ; OS2RtlUnwind is _Pascal
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| 173 | push dword ptr [esp+4] ;PWINEXCEPTION_FRAME pEndFrame
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| 174 | push dword ptr [esp+12] ;LPVOID unusedEip
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| 175 | push dword ptr [esp+20] ;PWINEXCEPTION_RECORD pRecord
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| 176 | push dword ptr [esp+28] ;DWORD returnEax
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| 177 | push dword ptr [esp+16] ;return address
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| 178 | push esp
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| 179 | add dword ptr [esp], 20
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| 180 | push ebp
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| 181 | pushfd
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| 182 | push eax
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| 183 | push ebx
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| 184 | push ecx
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| 185 | push edx
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| 186 | push edi
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| 187 | push esi
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| 188 | xor eax, eax
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| 189 | mov eax, cs
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| 190 | push eax
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| 191 | mov eax, ds
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| 192 | push eax
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| 193 | mov eax, es
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| 194 | push eax
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| 195 | mov eax, fs
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| 196 | push eax
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| 197 | mov eax, gs
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| 198 | push eax
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| 199 | mov eax, ss
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| 200 | push eax
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| 201 | call _OS2RtlUnwind
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| 202 | endif
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| 203 |
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| 204 | ret 16 ;__stdcall
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| 205 |
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| 206 | _RtlUnwind@16 endp
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| 207 |
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| 208 |
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| 209 | PUBLIC OS2ExceptionHandler
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| 210 | EXTRN OS2ExceptionHandler2ndLevel:NEAR
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| 211 |
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| 212 | OS2ExceptionHandler proc near
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| 213 | ;Clear the direction flag (as specified by the _System calling convention)
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| 214 | ;(OS/2 doesn't bother checking before calling our exception handler)
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| 215 | cld
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| 216 | jmp OS2ExceptionHandler2ndLevel
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| 217 | OS2ExceptionHandler endp
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| 218 |
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| 219 | PUBLIC _QueryExceptionChain
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| 220 |
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| 221 | _QueryExceptionChain proc near
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| 222 | mov eax, fs:[0]
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| 223 | ret
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| 224 | _QueryExceptionChain endp
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| 225 |
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| 226 | PUBLIC GetExceptionRecord
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| 227 | GetExceptionRecord proc near
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| 228 | push ebp
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| 229 | mov ebp, esp
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| 230 | push fs
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| 231 | push ebx
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| 232 |
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| 233 | mov eax, [ebp+8]
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| 234 | mov fs, eax
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| 235 | mov ebx, [ebp+12]
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| 236 | mov eax, fs:[ebx]
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| 237 |
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| 238 | pop ebx
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| 239 | pop fs
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| 240 | pop ebp
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| 241 | ret
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| 242 | GetExceptionRecord endp
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| 243 |
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| 244 | PUBLIC ChangeTIBStack
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| 245 | ChangeTIBStack proc near
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| 246 | ; xor eax, eax
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| 247 | push ebx
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| 248 | mov eax, fs:[4]
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| 249 | mov ebx, fs:[8]
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| 250 | add ebx, 8
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| 251 | mov fs:[4], ebx
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| 252 | mov fs:[8], eax
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| 253 | pop ebx
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| 254 | ret
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| 255 | ChangeTIBStack endp
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| 256 |
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| 257 | PUBLIC _SetExceptionChain
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| 258 |
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| 259 | _SetExceptionChain proc near
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| 260 | mov eax, dword ptr [esp+4]
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| 261 | mov fs:[0], eax
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| 262 | ret
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| 263 | _SetExceptionChain endp
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| 264 |
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| 265 |
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| 266 | ;;ULONG CDECL AsmCallThreadHandler(BOOL fAlignStack, ULONG handler, LPVOID parameter);
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| 267 | PUBLIC _AsmCallThreadHandler
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| 268 | _AsmCallThreadHandler proc near
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| 269 | push ebp
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| 270 | mov ebp, esp
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| 271 |
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| 272 | ;first check if we have 128kb stack or more; if not, then skip the stack alignment code
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| 273 | mov eax, [ebp+8]
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| 274 | cmp eax, 0
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| 275 | je @goodthreadstack
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| 276 |
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| 277 | ;We're asking for problems if our stack start near a 64kb boundary
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| 278 | ;Some OS/2 thunking procedures can choke if there's not enough stack left
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| 279 | mov eax, esp
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| 280 | and eax, 0FFFFh
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| 281 | cmp eax, 0E000h
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| 282 | jge @goodthreadstack
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| 283 |
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| 284 | ;set ESP to the top of the next 64kb block and touch each
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| 285 | ;page to make sure the guard page exception handler commits
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| 286 | ;those pages
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| 287 | mov edx, esp
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| 288 | sub edx, eax
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| 289 |
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| 290 | and esp, 0FFFFF000h
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| 291 | dec esp
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| 292 |
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| 293 | @touchthreadstackpages:
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| 294 | mov al, byte ptr [esp]
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| 295 |
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| 296 | sub esp, 1000h
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| 297 |
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| 298 | cmp esp, edx
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| 299 | jg @touchthreadstackpages
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| 300 |
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| 301 | mov esp, edx
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| 302 | sub esp, 16
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| 303 |
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| 304 | ;also touch this page
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| 305 | mov eax, dword ptr [esp]
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| 306 |
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| 307 | @goodthreadstack:
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| 308 |
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| 309 | mov eax, esp
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| 310 | sub eax, 16
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| 311 | and eax, 0FFFFFFF0h
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| 312 | ;now we make sure the stack is aligned at 16 bytes when the entrypoint is called
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| 313 | ;(8+4+4(return address) = 16)
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| 314 | add eax, 8
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| 315 | mov esp, eax
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| 316 |
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| 317 | push dword ptr [ebp+16]
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| 318 | mov eax, dword ptr [ebp+12]
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| 319 | call eax
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| 320 |
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| 321 | mov esp, ebp
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| 322 | pop ebp
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| 323 | ret
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| 324 | _AsmCallThreadHandler endp
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| 325 |
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| 326 | PUBLIC _CallEntryPoint
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| 327 | _CallEntryPoint proc near
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| 328 | push ebp
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| 329 | mov ebp, esp
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| 330 |
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| 331 | ;We're asking for problems if our stack start near a 64kb boundary
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| 332 | ;Some OS/2 thunking procedures can choke if there's not enough stack left
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| 333 | mov eax, esp
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| 334 | and eax, 0FFFFh
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| 335 | cmp eax, 0E000h
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| 336 | jge @goodmainstack
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| 337 |
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| 338 | ;set ESP to the top of the next 64kb block and touch each
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| 339 | ;page to make sure the guard page exception handler commits
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| 340 | ;those pages
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| 341 | mov edx, esp
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| 342 | sub edx, eax
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| 343 |
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| 344 | and esp, 0FFFFF000h
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| 345 | dec esp
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| 346 |
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| 347 | @touchmainstackpages:
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| 348 | mov al, byte ptr [esp]
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| 349 |
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| 350 | sub esp, 1000h
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| 351 |
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| 352 | cmp esp, edx
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| 353 | jg @touchmainstackpages
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| 354 |
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| 355 | mov esp, edx
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| 356 | sub esp, 16
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| 357 |
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| 358 | ;also touch this page
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| 359 | mov eax, dword ptr [esp]
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| 360 |
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| 361 | @goodmainstack:
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| 362 |
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| 363 | mov eax, esp
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| 364 | sub eax, 16
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| 365 | and eax, 0FFFFFFF0h
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| 366 | ;now we make sure the stack is aligned at 16 bytes when the entrypoint is called
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| 367 | ;(8+4+4(return address) = 16)
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| 368 | add eax, 8
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| 369 | mov esp, eax
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| 370 |
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| 371 | push dword ptr [ebp+12]
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| 372 | mov eax, dword ptr [ebp+8]
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| 373 | call eax
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| 374 |
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| 375 | mov esp, ebp
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| 376 | pop ebp
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| 377 | ret
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| 378 | _CallEntryPoint endp
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| 379 |
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| 380 | ifndef __EMX__
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| 381 |
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| 382 | EXTRN WriteLog:PROC
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| 383 | EXTRN _GetThreadTEB@0:PROC
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| 384 | IFDEF DEBUG
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| 385 | EXTRN _DbgEnabledKERNEL32:DWORD
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| 386 | ENDIF
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| 387 |
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| 388 | ; 129 static inline WINEXCEPTION_FRAME * EXC_push_frame( WINEXCEPTION_FRAME *frame )
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| 389 | align 04h
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| 390 |
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| 391 | EXC_push_frame proc
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| 392 | push ebp
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| 393 | mov ebp,esp
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| 394 | sub esp,04h
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| 395 | mov [ebp+08h],eax; frame
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| 396 |
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| 397 | ; 132 TEB *teb = GetThreadTEB();
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| 398 | call _GetThreadTEB@0
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| 399 | mov [ebp-04h],eax; teb
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| 400 |
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| 401 | ; 133 frame->Prev = (PWINEXCEPTION_FRAME)teb->except;
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| 402 | mov ecx,[ebp-04h]; teb
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| 403 | mov ecx,[ecx]
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| 404 | mov eax,[ebp+08h]; frame
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| 405 | mov [eax],ecx
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| 406 |
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| 407 | ; 134 teb->except = frame;
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| 408 | mov eax,[ebp-04h]; teb
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| 409 | mov ecx,[ebp+08h]; frame
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| 410 | mov [eax],ecx
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| 411 |
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| 412 | ; 135 return frame->Prev;
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| 413 | mov eax,[ebp+08h]; frame
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| 414 | mov eax,[eax]
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| 415 | leave
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| 416 | ret
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| 417 | EXC_push_frame endp
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| 418 |
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| 419 | ; 138 static inline WINEXCEPTION_FRAME * EXC_pop_frame( WINEXCEPTION_FRAME *frame )
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| 420 | align 04h
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| 421 |
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| 422 | EXC_pop_frame proc
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| 423 | push ebp
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| 424 | mov ebp,esp
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| 425 | sub esp,04h
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| 426 | mov [ebp+08h],eax; frame
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| 427 |
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| 428 | ; 141 TEB *teb = GetThreadTEB();
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| 429 | call _GetThreadTEB@0
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| 430 | mov [ebp-04h],eax; teb
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| 431 |
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| 432 | ; 142 teb->except = frame->Prev;
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| 433 | mov ecx,[ebp+08h]; frame
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| 434 | mov ecx,[ecx]
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| 435 | mov eax,[ebp-04h]; teb
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| 436 | mov [eax],ecx
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| 437 |
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| 438 | ; 143 return frame->Prev;
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| 439 | mov eax,[ebp+08h]; frame
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| 440 | mov eax,[eax]
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| 441 | leave
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| 442 | ret
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| 443 | EXC_pop_frame endp
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| 444 |
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| 445 | ; 281 static extern "C" DWORD EXC_CallHandler( WINEXCEPTION_RECORD *record, WINEXCEPTION_FRAME *frame,
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| 446 | align 04h
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| 447 | PUBLIC _EXC_CallHandler
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| 448 |
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| 449 | _EXC_CallHandler proc
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| 450 | push ebp
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| 451 | mov ebp,esp
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| 452 | sub esp,010h
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| 453 | sub esp,04h
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| 454 | mov [ebp+08h],eax; record
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| 455 | mov [ebp+0ch],edx; frame
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| 456 | mov [ebp+010h],ecx; context
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| 457 |
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| 458 | ; 296 newframe.frame.Handler = nested_handler;
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| 459 | mov eax,[ebp+01ch]; nested_handler
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| 460 | mov [ebp-08h],eax; newframe
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| 461 |
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| 462 | ; 297 newframe.prevFrame = frame;
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| 463 | mov eax,[ebp+0ch]; frame
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| 464 | mov [ebp-04h],eax; newframe
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| 465 |
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| 466 | ; 298 EXC_push_frame( &newframe.frame );
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| 467 | lea eax,[ebp-0ch]; newframe
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| 468 | call EXC_push_frame
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| 469 |
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| 470 | ; 299 dprintf(("KERNEL32: Calling handler at %p code=%lx flags=%lx\n",
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| 471 | IFDEF DEBUG
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| 472 | cmp word ptr _DbgEnabledKERNEL32+020h,01h
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| 473 | jne @BLBL20
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| 474 | mov eax,[ebp+08h]; record
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| 475 | push dword ptr [eax+04h]
|
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| 476 | mov eax,[ebp+08h]; record
|
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| 477 | push dword ptr [eax]
|
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| 478 | push dword ptr [ebp+018h]; handler
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| 479 | push offset FLAT:@CBE8
|
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| 480 | call WriteLog
|
|---|
| 481 | add esp,010h
|
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| 482 | ENDIF
|
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| 483 |
|
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| 484 | ; 300 handler, record->ExceptionCode, record->ExceptionFlags));
|
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| 485 | @BLBL20:
|
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| 486 |
|
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| 487 | ; 301 ret = handler( record, frame, context, dispatcher );
|
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| 488 | push dword ptr [ebp+014h]; dispatcher
|
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| 489 | push dword ptr [ebp+010h]; context
|
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| 490 | push dword ptr [ebp+0ch]; frame
|
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| 491 | push dword ptr [ebp+08h]; record
|
|---|
| 492 | call dword ptr [ebp+018h]; handler
|
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| 493 | mov [ebp-010h],eax; ret
|
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| 494 |
|
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| 495 | IFDEF DEBUG
|
|---|
| 496 | ; 302 dprintf(("KERNEL32: Handler returned %lx\n", ret));
|
|---|
| 497 | cmp word ptr _DbgEnabledKERNEL32+020h,01h
|
|---|
| 498 | jne @BLBL21
|
|---|
| 499 | push dword ptr [ebp-010h]; ret
|
|---|
| 500 | push offset FLAT:@CBE9
|
|---|
| 501 | call WriteLog
|
|---|
| 502 | add esp,08h
|
|---|
| 503 | @BLBL21:
|
|---|
| 504 | ENDIF
|
|---|
| 505 |
|
|---|
| 506 | ; 303 EXC_pop_frame( &newframe.frame );
|
|---|
| 507 | lea eax,[ebp-0ch]; newframe
|
|---|
| 508 | call EXC_pop_frame
|
|---|
| 509 |
|
|---|
| 510 | ; 304 return ret;
|
|---|
| 511 | mov eax,[ebp-010h]; ret
|
|---|
| 512 | add esp,04h
|
|---|
| 513 | leave
|
|---|
| 514 | ret
|
|---|
| 515 | _EXC_CallHandler endp
|
|---|
| 516 |
|
|---|
| 517 | endif ; ifndef __EMX__
|
|---|
| 518 |
|
|---|
| 519 | CODE32 ENDS
|
|---|
| 520 |
|
|---|
| 521 | END
|
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