93 lines
3.4 KiB
PHP
93 lines
3.4 KiB
PHP
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; DWORD CallCPLEntry16(UINT hinst, DWORD lpfnEntry,
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; HWND hwndCPL, UINT msg,
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; DWORD lParam1, DWORD lParam2)
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BODYQT_CALLCPLENTRY16 macro index
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local CPL_afMapping
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local do_callcplentry16
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local apm_map_explicit
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local before_call
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local call_the_bugger
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local no_unmapping
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hinst equ <[ebp_qttop]>
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lpfnEntry equ <[ebp_qttop+4]>
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hwndCPL equ <[ebp_qttop+8]>
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msg equ <[ebp_qttop+12]>
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lParam1 equ <[ebp_qttop+16]>
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lParam2 equ <[ebp_qttop+20]>
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; skip past our table below to the meat of the routine
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jmp do_callcplentry16
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;
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; This table indicates whether we need to thunk lParam2 or not.
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;
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CPL_afMapping label byte
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db 0 ; CPL_INIT
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db 0 ; CPL_GETCOUNT
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db 1 ; CPL_INQUIRE int, LPCPINFO
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db 0 ; CPL_SELECT int, DWORD
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db 0 ; CPL_DBLCLK int, DWORD
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db 0 ; CPL_STOP int, DWORD
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db 0 ; CPL_EXIT
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db 1 ; CPL_NEWINQUIRE int, LPNEWCPLINFO
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db 1 ; CPL_STARTWPARAMS int, LPSTR
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CPL_MAX equ ($-CPL_afMapping)
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apm_map_explicit:
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inc ecx ;explicitly set mapping flag
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jmp before_call
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do_callcplentry16:
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xor ecx, ecx ;ecx controls pointer mapping, init 0
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mov edx, dword ptr msg ;message index so we can decide
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; HACK: OEM APM extensions use entrypoints identical to CPlApplet,
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; but have msgs needing special care. Caller sets bit 15
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; (0x8000) on these msgs. Both msgs needing special care
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; map identically to CPL_NEWINQUIRE
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test edx, 8000h ;special APM msg?
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jnz apm_map_explicit ;we will need to map
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; use table above to determine mapping, assumes ecx is still zero
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dec edx ;the table is 0 based
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cmp edx, CPL_MAX ;check for index within table
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jnc before_call ;let it through with no mapping
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; move the correct mapping flag from our table into ecx
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mov cl, byte ptr cs:[edx + CPL_afMapping]
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before_call:
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push ecx ;save mapping flag for thunk return
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jcxz call_the_bugger ;skip mapping if it's zero
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; map lParam2 to 16:16
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push dword ptr lParam2
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call MapLS
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mov dword ptr lParam2, eax ;pass mapped result instead
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call_the_bugger:
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push word ptr hinst ;hinst: dword->word
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push dword ptr lpfnEntry ;lpfnEntry: dword->dword
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push word ptr hwndCPL ;hwndCPL: dword->word
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push word ptr msg ;msg: dword->word
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push dword ptr lParam1 ;lParam1: dword->dword
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push dword ptr lParam2 ;lParam2: dword->dword
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mov cl,index ;thunk index
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call QT_Call16_DWordToDWord
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pop ecx ;restore mapping flag from above
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jcxz no_unmapping ;skip unmapping if it's zero
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; free 16:16 mapping for lParam2
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push eax ;save CplApplet return value
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push dword ptr lParam2
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call UnMapLS
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pop eax ;restore CplApplet return value
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no_unmapping:
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endm
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