149 lines
3.3 KiB
NASM
149 lines
3.3 KiB
NASM
title "LdrInitializeThunk"
|
|
;++
|
|
;
|
|
; Copyright (c) 1989 Microsoft Corporation
|
|
;
|
|
; Module Name:
|
|
;
|
|
; ldrthunk.s
|
|
;
|
|
; Abstract:
|
|
;
|
|
; This module implements the thunk for the LdrpInitialize APC routine.
|
|
;
|
|
; Author:
|
|
;
|
|
; Steven R. Wood (stevewo) 27-Apr-1990
|
|
;
|
|
; Environment:
|
|
;
|
|
; Any mode.
|
|
;
|
|
; Revision History:
|
|
;
|
|
;--
|
|
|
|
.386p
|
|
.xlist
|
|
include ks386.inc
|
|
include callconv.inc ; calling convention macros
|
|
.list
|
|
|
|
EXTRNP _LdrpInitialize,3
|
|
|
|
_TEXT SEGMENT DWORD PUBLIC 'CODE'
|
|
ASSUME DS:FLAT, ES:FLAT, SS:NOTHING, FS:NOTHING, GS:NOTHING
|
|
|
|
page , 132
|
|
|
|
;++
|
|
;
|
|
; VOID
|
|
; LdrInitializeThunk(
|
|
; IN PVOID NormalContext,
|
|
; IN PVOID SystemArgument1,
|
|
; IN PVOID SystemArgument2
|
|
; )
|
|
;
|
|
; Routine Description:
|
|
;
|
|
; This function computes a pointer to the context record on the stack
|
|
; and jumps to the LdrpInitialize function with that pointer as its
|
|
; parameter.
|
|
;
|
|
; Arguments:
|
|
;
|
|
; NormalContext - User Mode APC context parameter (ignored).
|
|
;
|
|
; SystemArgument1 - User Mode APC system argument 1 (ignored).
|
|
;
|
|
; SystemArgument2 - User Mode APC system argument 2 (ignored).
|
|
;
|
|
; Return Value:
|
|
;
|
|
; None.
|
|
;
|
|
;--
|
|
|
|
cPublicProc _LdrInitializeThunk , 4
|
|
|
|
NormalContext equ [esp + 4]
|
|
SystemArgument1 equ [esp + 8]
|
|
SystemArgument2 equ [esp + 12]
|
|
Context equ [esp + 16]
|
|
|
|
lea eax,Context ; Calculate address of context record
|
|
mov NormalContext,eax ; Pass as first parameter to
|
|
if DEVL
|
|
xor ebp,ebp ; Mark end of frame pointer list
|
|
endif
|
|
IFDEF STD_CALL
|
|
jmp _LdrpInitialize@12 ; LdrpInitialize
|
|
ELSE
|
|
jmp _LdrpInitialize ; LdrpInitialize
|
|
ENDIF
|
|
|
|
stdENDP _LdrInitializeThunk
|
|
|
|
;++
|
|
;
|
|
; VOID
|
|
; LdrpCallInitRoutine(
|
|
; IN PDLL_INIT_ROUTINE InitRoutine,
|
|
; IN PVOID DllHandle,
|
|
; IN ULONG Reason,
|
|
; IN PCONTEXT Context OPTIONAL
|
|
; )
|
|
;
|
|
; Routine Description:
|
|
;
|
|
; This function calls an x86 DLL init routine. It is robust
|
|
; against DLLs that don't preserve EBX or fail to clean up
|
|
; enough stack.
|
|
;
|
|
; The only register that the DLL init routine cannot trash is ESI.
|
|
;
|
|
; Arguments:
|
|
;
|
|
; InitRoutine - Address of init routine to call
|
|
;
|
|
; DllHandle - Handle of DLL to call
|
|
;
|
|
; Reason - one of the DLL_PROCESS_... or DLL_THREAD... values
|
|
;
|
|
; Context - context pointer or NULL
|
|
;
|
|
; Return Value:
|
|
;
|
|
; FALSE if the init routine fails, TRUE for success.
|
|
;
|
|
;--
|
|
|
|
cPublicProc _LdrpCallInitRoutine , 4
|
|
|
|
InitRoutine equ [ebp + 8]
|
|
DllHandle equ [ebp + 12]
|
|
Reason equ [ebp + 16]
|
|
Context equ [ebp + 20]
|
|
|
|
stdENDP _LdrpCallInitRoutine
|
|
push ebp
|
|
mov ebp, esp
|
|
push esi ; save esi across the call
|
|
push edi ; save edi across the call
|
|
push ebx ; save ebx on the stack across the call
|
|
mov esi,esp ; save the stack pointer in esi across the call
|
|
push Context
|
|
push Reason
|
|
push DllHandle
|
|
call InitRoutine
|
|
mov esp,esi ; restore the stack pointer in case callee forgot to clean up
|
|
pop ebx ; restore ebx
|
|
pop edi ; restore edi
|
|
pop esi ; restore esi
|
|
pop ebp
|
|
stdRET _LdrpCallInitRoutine
|
|
|
|
_TEXT ends
|
|
end
|