| 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 | public _RaiseException@16
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| 36 | extrn OS2RAISEEXCEPTION : near
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| 37 |
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| 38 | _RaiseException@16 proc near
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| 39 | push dword ptr [esp+4] ;DWORD dwExceptionCode
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| 40 | push dword ptr [esp+12] ;DWORD dwExceptionFlags
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| 41 | push dword ptr [esp+20] ;DWORD cArguments
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| 42 | push dword ptr [esp+28] ;DWORD *lpArguments
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| 43 | push dword ptr [esp+16] ;return address
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| 44 | push esp
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| 45 | add dword ptr [esp], 20
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| 46 | push ebp
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| 47 | pushfd
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| 48 | push eax
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| 49 | push ebx
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| 50 | push ecx
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| 51 | push edx
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| 52 | push edi
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| 53 | push esi
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| 54 | xor eax, eax
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| 55 | mov eax, cs
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| 56 | push eax
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| 57 | mov eax, ds
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| 58 | push eax
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| 59 | mov eax, es
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| 60 | push eax
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| 61 | mov eax, fs
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| 62 | push eax
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| 63 | mov eax, gs
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| 64 | push eax
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| 65 | mov eax, ss
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| 66 | push eax
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| 67 | call OS2RAISEEXCEPTION
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| 68 |
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| 69 | ret 16 ;__stdcall
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| 70 | _RaiseException@16 endp
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| 71 |
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| 72 | public _RtlUnwind@16
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| 73 | extrn OS2RTLUNWIND : near
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| 74 |
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| 75 | _RtlUnwind@16 proc near
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| 76 | push dword ptr [esp+4] ;PWINEXCEPTION_FRAME pEndFrame
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| 77 | push dword ptr [esp+12] ;LPVOID unusedEip
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| 78 | push dword ptr [esp+20] ;PWINEXCEPTION_RECORD pRecord
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| 79 | push dword ptr [esp+28] ;DWORD returnEax
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| 80 | push dword ptr [esp+16] ;return address
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| 81 | push esp
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| 82 | add dword ptr [esp], 20
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| 83 | push ebp
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| 84 | pushfd
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| 85 | push eax
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| 86 | push ebx
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| 87 | push ecx
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| 88 | push edx
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| 89 | push edi
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| 90 | push esi
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| 91 | xor eax, eax
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| 92 | mov eax, cs
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| 93 | push eax
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| 94 | mov eax, ds
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| 95 | push eax
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| 96 | mov eax, es
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| 97 | push eax
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| 98 | mov eax, fs
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| 99 | push eax
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| 100 | mov eax, gs
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| 101 | push eax
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| 102 | mov eax, ss
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| 103 | push eax
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| 104 | call OS2RTLUNWIND
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| 105 |
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| 106 | ret 16 ;__stdcall
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| 107 | _RtlUnwind@16 endp
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| 108 |
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| 109 |
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| 110 | PUBLIC OS2ExceptionHandler
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| 111 | EXTRN OS2ExceptionHandler2ndLevel:NEAR
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| 112 |
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| 113 | OS2ExceptionHandler proc near
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| 114 | ;Clear the direction flag (as specified by the _System calling convention)
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| 115 | ;(OS/2 doesn't bother checking before calling our exception handler)
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| 116 | cld
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| 117 | jmp OS2ExceptionHandler2ndLevel
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| 118 | OS2ExceptionHandler endp
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| 119 |
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| 120 | PUBLIC QueryExceptionChain
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| 121 |
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| 122 | QueryExceptionChain proc near
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| 123 | mov eax, fs:[0]
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| 124 | ret
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| 125 | QueryExceptionChain endp
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| 126 |
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| 127 | PUBLIC GetExceptionRecord
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| 128 | GetExceptionRecord proc near
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| 129 | push ebp
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| 130 | mov ebp, esp
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| 131 | push fs
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| 132 | push ebx
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| 133 |
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| 134 | mov eax, [ebp+8]
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| 135 | mov fs, eax
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| 136 | mov ebx, [ebp+12]
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| 137 | mov eax, fs:[ebx]
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| 138 |
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| 139 | pop ebx
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| 140 | pop fs
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| 141 | pop ebp
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| 142 | ret
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| 143 | GetExceptionRecord endp
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| 144 |
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| 145 | PUBLIC ChangeTIBStack
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| 146 | ChangeTIBStack proc near
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| 147 | ; xor eax, eax
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| 148 | push ebx
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| 149 | mov eax, fs:[4]
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| 150 | mov ebx, fs:[8]
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| 151 | add ebx, 8
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| 152 | mov fs:[4], ebx
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| 153 | mov fs:[8], eax
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| 154 | pop ebx
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| 155 | ret
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| 156 | ChangeTIBStack endp
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| 157 |
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| 158 | PUBLIC _SetExceptionChain
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| 159 |
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| 160 | _SetExceptionChain proc near
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| 161 | mov eax, dword ptr [esp+4]
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| 162 | mov fs:[0], eax
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| 163 | ret
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| 164 | _SetExceptionChain endp
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| 165 |
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| 166 |
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| 167 | ;;ULONG CDECL AsmCallThreadHandler(BOOL fAlignStack, ULONG handler, LPVOID parameter);
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| 168 | PUBLIC _AsmCallThreadHandler
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| 169 | _AsmCallThreadHandler proc near
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| 170 | push ebp
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| 171 | mov ebp, esp
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| 172 |
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| 173 | ;first check if we have 128kb stack or more; if not, then skip the stack alignment code
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| 174 | mov eax, [ebp+8]
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| 175 | cmp eax, 0
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| 176 | je @goodthreadstack
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| 177 |
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| 178 | ;We're asking for problems if our stack start near a 64kb boundary
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| 179 | ;Some OS/2 thunking procedures can choke if there's not enough stack left
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| 180 | mov eax, esp
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| 181 | and eax, 0FFFFh
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| 182 | cmp eax, 0E000h
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| 183 | jge @goodthreadstack
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| 184 |
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| 185 | ;set ESP to the top of the next 64kb block and touch each
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| 186 | ;page to make sure the guard page exception handler commits
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| 187 | ;those pages
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| 188 | mov edx, esp
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| 189 | sub edx, eax
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| 190 |
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| 191 | and esp, 0FFFFF000h
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| 192 | dec esp
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| 193 |
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| 194 | @touchthreadstackpages:
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| 195 | mov al, byte ptr [esp]
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| 196 |
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| 197 | sub esp, 1000h
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| 198 |
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| 199 | cmp esp, edx
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| 200 | jg @touchthreadstackpages
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| 201 |
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| 202 | mov esp, edx
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| 203 | sub esp, 16
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| 204 |
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| 205 | ;also touch this page
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| 206 | mov eax, dword ptr [esp]
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| 207 |
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| 208 | @goodthreadstack:
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| 209 |
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| 210 | mov eax, esp
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| 211 | sub eax, 16
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| 212 | and eax, 0FFFFFFF0h
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| 213 | ;now we make sure the stack is aligned at 16 bytes when the entrypoint is called
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| 214 | ;(8+4+4(return address) = 16)
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| 215 | add eax, 8
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| 216 | mov esp, eax
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| 217 |
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| 218 | push dword ptr [ebp+16]
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| 219 | mov eax, dword ptr [ebp+12]
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| 220 | call eax
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| 221 |
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| 222 | mov esp, ebp
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| 223 | pop ebp
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| 224 | ret
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| 225 | _AsmCallThreadHandler endp
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| 226 |
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| 227 | PUBLIC _CallEntryPoint
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| 228 | _CallEntryPoint proc near
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| 229 | push ebp
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| 230 | mov ebp, esp
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| 231 |
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| 232 | ;We're asking for problems if our stack start near a 64kb boundary
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| 233 | ;Some OS/2 thunking procedures can choke if there's not enough stack left
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| 234 | mov eax, esp
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| 235 | and eax, 0FFFFh
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| 236 | cmp eax, 0E000h
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| 237 | jge @goodmainstack
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| 238 |
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| 239 | ;set ESP to the top of the next 64kb block and touch each
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| 240 | ;page to make sure the guard page exception handler commits
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| 241 | ;those pages
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| 242 | mov edx, esp
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| 243 | sub edx, eax
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| 244 |
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| 245 | and esp, 0FFFFF000h
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| 246 | dec esp
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| 247 |
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| 248 | @touchmainstackpages:
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| 249 | mov al, byte ptr [esp]
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| 250 |
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| 251 | sub esp, 1000h
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| 252 |
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| 253 | cmp esp, edx
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| 254 | jg @touchmainstackpages
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| 255 |
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| 256 | mov esp, edx
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| 257 | sub esp, 16
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| 258 |
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| 259 | ;also touch this page
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| 260 | mov eax, dword ptr [esp]
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| 261 |
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| 262 | @goodmainstack:
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| 263 |
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| 264 | mov eax, esp
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| 265 | sub eax, 16
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| 266 | and eax, 0FFFFFFF0h
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| 267 | ;now we make sure the stack is aligned at 16 bytes when the entrypoint is called
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| 268 | ;(8+4+4(return address) = 16)
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| 269 | add eax, 8
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| 270 | mov esp, eax
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| 271 |
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| 272 | push dword ptr [ebp+12]
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| 273 | mov eax, dword ptr [ebp+8]
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| 274 | call eax
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| 275 |
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| 276 | mov esp, ebp
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| 277 | pop ebp
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| 278 | ret
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| 279 | _CallEntryPoint endp
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| 280 |
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| 281 |
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| 282 | ; 281 static DWORD EXC_CallHandler( WINEXCEPTION_RECORD *record, WINEXCEPTION_FRAME *frame,
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| 283 | EXTRN WriteLog:PROC
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| 284 | EXTRN _GetThreadTEB@0:PROC
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| 285 | IFDEF DEBUG
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| 286 | EXTRN DbgEnabledKERNEL32:DWORD
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| 287 | ENDIF
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| 288 |
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| 289 | EXC_push_frame__FP19_WINEXCEPTION_FRAME proc
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| 290 | push ebp
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| 291 | mov ebp,esp
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| 292 | sub esp,04h
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| 293 | mov [ebp+08h],eax; frame
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| 294 |
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| 295 | ; 132 TEB *teb = GetThreadTEB();
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| 296 | call _GetThreadTEB@0
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| 297 | mov [ebp-04h],eax; teb
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| 298 |
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| 299 | ; 133 frame->Prev = (PWINEXCEPTION_FRAME)teb->except;
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| 300 | mov ecx,[ebp-04h]; teb
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| 301 | mov ecx,[ecx]
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| 302 | mov eax,[ebp+08h]; frame
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| 303 | mov [eax],ecx
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| 304 |
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| 305 | ; 134 teb->except = frame;
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| 306 | mov eax,[ebp-04h]; teb
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| 307 | mov ecx,[ebp+08h]; frame
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| 308 | mov [eax],ecx
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| 309 |
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| 310 | ; 135 return frame->Prev;
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| 311 | mov eax,[ebp+08h]; frame
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| 312 | mov eax,[eax]
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| 313 | leave
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| 314 | ret
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| 315 | EXC_push_frame__FP19_WINEXCEPTION_FRAME endp
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| 316 |
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| 317 | ; 138 static inline WINEXCEPTION_FRAME * EXC_pop_frame( WINEXCEPTION_FRAME *frame )
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| 318 | align 04h
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| 319 |
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| 320 | EXC_pop_frame__FP19_WINEXCEPTION_FRAME proc
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| 321 | push ebp
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| 322 | mov ebp,esp
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| 323 | sub esp,04h
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| 324 | mov [ebp+08h],eax; frame
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| 325 |
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| 326 | ; 141 TEB *teb = GetThreadTEB();
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| 327 | call _GetThreadTEB@0
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| 328 | mov [ebp-04h],eax; teb
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| 329 |
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| 330 | ; 142 teb->except = frame->Prev;
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| 331 | mov ecx,[ebp+08h]; frame
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| 332 | mov ecx,[ecx]
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| 333 | mov eax,[ebp-04h]; teb
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| 334 | mov [eax],ecx
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| 335 |
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| 336 | ; 143 return frame->Prev;
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| 337 | mov eax,[ebp+08h]; frame
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| 338 | mov eax,[eax]
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| 339 | leave
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| 340 | ret
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| 341 | EXC_pop_frame__FP19_WINEXCEPTION_FRAME endp
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| 342 |
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| 343 | align 04h
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| 344 | PUBLIC EXC_CallHandler__FP20_WINEXCEPTION_RECORDP19_WINEXCEPTION_FRAMEP10WINCONTEXTPP19_WINEXCEPTION_FRAMEPFP20_WINEXCEPTION_RECORDP19_WINEXCEPTION_FRAMEP10WINCONTEXTPv_UlT5
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| 345 |
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| 346 | EXC_CallHandler__FP20_WINEXCEPTION_RECORDP19_WINEXCEPTION_FRAMEP10WINCONTEXTPP19_WINEXCEPTION_FRAMEPFP20_WINEXCEPTION_RECORDP19_WINEXCEPTION_FRAMEP10WINCONTEXTPv_UlT5 proc
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| 347 | push ebp
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| 348 | mov ebp,esp
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| 349 | sub esp,010h
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| 350 | sub esp,04h
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| 351 | mov [ebp+08h],eax; record
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| 352 | mov [ebp+0ch],edx; frame
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| 353 | mov [ebp+010h],ecx; context
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| 354 |
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| 355 | ; 296 newframe.frame.Handler = nested_handler;
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| 356 | mov eax,[ebp+01ch]; nested_handler
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| 357 | mov [ebp-08h],eax; newframe
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| 358 |
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| 359 | ; 297 newframe.prevFrame = frame;
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| 360 | mov eax,[ebp+0ch]; frame
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| 361 | mov [ebp-04h],eax; newframe
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| 362 |
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| 363 | ; 298 EXC_push_frame( &newframe.frame );
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| 364 | lea eax,[ebp-0ch]; newframe
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| 365 | call EXC_push_frame__FP19_WINEXCEPTION_FRAME
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| 366 |
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| 367 | ; 299 dprintf(("KERNEL32: Calling handler at %p code=%lx flags=%lx\n",
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| 368 | IFDEF DEBUG
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| 369 | cmp word ptr DbgEnabledKERNEL32+020h,01h
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| 370 | jne @BLBL20
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| 371 | mov eax,[ebp+08h]; record
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| 372 | push dword ptr [eax+04h]
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| 373 | mov eax,[ebp+08h]; record
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| 374 | push dword ptr [eax]
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| 375 | push dword ptr [ebp+018h]; handler
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| 376 | push offset FLAT:@CBE8
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| 377 | call WriteLog
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| 378 | add esp,010h
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| 379 | ENDIF
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| 380 |
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| 381 | ; 300 handler, record->ExceptionCode, record->ExceptionFlags));
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| 382 | @BLBL20:
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| 383 |
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| 384 | ; 301 ret = handler( record, frame, context, dispatcher );
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| 385 | push dword ptr [ebp+014h]; dispatcher
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| 386 | push dword ptr [ebp+010h]; context
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| 387 | push dword ptr [ebp+0ch]; frame
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| 388 | push dword ptr [ebp+08h]; record
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| 389 | call dword ptr [ebp+018h]; handler
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| 390 | mov [ebp-010h],eax; ret
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| 391 |
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| 392 | IFDEF DEBUG
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| 393 | ; 302 dprintf(("KERNEL32: Handler returned %lx\n", ret));
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| 394 | cmp word ptr DbgEnabledKERNEL32+020h,01h
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| 395 | jne @BLBL21
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| 396 | push dword ptr [ebp-010h]; ret
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| 397 | push offset FLAT:@CBE9
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| 398 | call WriteLog
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| 399 | add esp,08h
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| 400 | @BLBL21:
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| 401 | ENDIF
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| 402 |
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| 403 | ; 303 EXC_pop_frame( &newframe.frame );
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| 404 | lea eax,[ebp-0ch]; newframe
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| 405 | call EXC_pop_frame__FP19_WINEXCEPTION_FRAME
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| 406 |
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| 407 | ; 304 return ret;
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| 408 | mov eax,[ebp-010h]; ret
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| 409 | add esp,04h
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| 410 | leave
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| 411 | ret
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| 412 | EXC_CallHandler__FP20_WINEXCEPTION_RECORDP19_WINEXCEPTION_FRAMEP10WINCONTEXTPP19_WINEXCEPTION_FRAMEPFP20_WINEXCEPTION_RECORDP19_WINEXCEPTION_FRAMEP10WINCONTEXTPv_UlT5 endp
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| 413 |
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| 414 | CODE32 ENDS
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| 415 |
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| 416 | END
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