📄 ntldr内存初始化、分配、操作及相关函数分析.mht
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</SPAN> <BR> ULONG Address,<SPAN style=3D"DISPLAY: =
none">=20
#Q9}JY=0FT'g </SPAN> <BR> ULONG Size<SPAN =
style=3D"DISPLAY: none">=20
-1S{$ HR=03 </SPAN> <BR> )<SPAN style=3D"DISPLAY: =
none"> Dn2[zRU1Ob=20
</SPAN> <BR><SPAN style=3D"DISPLAY: =
none">>C0=1B=0E<K=1AO=20
</SPAN> <BR>/*++<SPAN style=3D"DISPLAY: none"> =17=14"b:$ =
=0E=19=1E=20
</SPAN> <BR><SPAN style=3D"DISPLAY: none">Z@rq=01^. =03*=20
</SPAN> <BR>Routine Description:<SPAN style=3D"DISPLAY: =
none">=20
C?mI=187u-=19=1E </SPAN> <BR><SPAN style=3D"DISPLAY: =
none">"*<{=10V=3D2OK=20
</SPAN> <BR> This routine inserts a descriptor into the =
correct=20
place in the<SPAN style=3D"DISPLAY: none"> 6)=10m\Bb=1A`O=20
</SPAN> <BR> memory descriptor list.<SPAN=20
style=3D"DISPLAY: none"> =1BJ*,=16=14>b </SPAN> <BR><SPAN=20
style=3D"DISPLAY: none">5zna=169G=05R=1B =
</SPAN> <BR>Arguments:<SPAN=20
style=3D"DISPLAY: none"> uE=12=1CafR =18u </SPAN> <BR><SPAN=20
style=3D"DISPLAY: none">s[=1A2& d=1Dv` </SPAN> <BR> =
Address -=20
Starting address of the memory block.<SPAN style=3D"DISPLAY: =
none">=20
a=1B"U+V/sSD </SPAN> <BR><SPAN style=3D"DISPLAY: =
none">:^pSJP=1Fe;$=20
</SPAN> <BR> Size - Size of the memory block to be=20
inserted.<SPAN style=3D"DISPLAY: none"> =17vp =02angb=17 =
</SPAN> <BR><SPAN=20
style=3D"DISPLAY: none">D]\=04Vz<=0E`` </SPAN> <BR>Return =
Value:<SPAN=20
style=3D"DISPLAY: none"> S{B=19~`La=174 </SPAN> <BR><SPAN=20
style=3D"DISPLAY: none">s4+a<`b#H </SPAN> <BR> =
None.<SPAN=20
style=3D"DISPLAY: none"> =1D=19S=05|=13 .][ </SPAN> <BR><SPAN =
style=3D"DISPLAY: none">OR5=07l8=1AyKC </SPAN> <BR>--*/<SPAN=20
style=3D"DISPLAY: none"> c} ]=17"=12=1E02 </SPAN> <BR><SPAN=20
style=3D"DISPLAY: none">=14 ?F(VK(:=01 </SPAN> <BR>{<SPAN=20
style=3D"DISPLAY: none"> 0PPxYIE~1=16 </SPAN> <BR> =20
MEMORY_LIST_ENTRY _far *CurrentEntry;<SPAN style=3D"DISPLAY: =
none"> I~a=20
`=12^>/a </SPAN> <BR><SPAN style=3D"DISPLAY: =
none">_"$p^O$vG$=20
</SPAN> <BR>#ifdef DEBUG1<SPAN style=3D"DISPLAY: none"> =
=1FJ7=1FfP\t}=08=20
</SPAN> <BR> BlPrint("Inserting descriptor %lx at=20
%lx\n",Size,Address);<SPAN style=3D"DISPLAY: none"> =
(S1El&=18n=17=08=20
</SPAN> <BR> _asm {<SPAN style=3D"DISPLAY: =
none">=20
a#g3=3D^=12=1C'v </SPAN> <BR> push =
=20
ax<SPAN style=3D"DISPLAY: none"> =181SE|=10=10[U =
</SPAN> <BR> =20
mov ax, 0<SPAN style=3D"DISPLAY: none"> =
-=08E=0FAAM05q=20
</SPAN> <BR> int 16h<SPAN=20
style=3D"DISPLAY: none"> =18=18Ddd$\XLx </SPAN> <BR> =
=20
pop ax<SPAN style=3D"DISPLAY: none"> =14E'`m=10V=18) =
</SPAN> <BR> }<SPAN style=3D"DISPLAY: none"> =
(FcuZi`=06.#=20
</SPAN> <BR>#endif<SPAN style=3D"DISPLAY: none"> =
oJ=13?~?O=07#v=20
</SPAN> <BR> //<SPAN style=3D"DISPLAY: none"> =04=1Fi =
(=1F 4!=20
</SPAN> <BR> // Search the spot to insert the new=20
descriptor.<SPAN style=3D"DISPLAY: none"> W =03=1C=1Eq:Uel =
</SPAN> <BR> =20
//<SPAN style=3D"DISPLAY: none"> .<1 b9cz*5 =
</SPAN> <BR><SPAN=20
style=3D"DISPLAY: none">m`Ltgy8#B=1B </SPAN> <BR>CurrentEntry =
=3D=20
MemoryDescriptorList;<SPAN style=3D"DISPLAY: none"> =
v5Z=12oen=19=15=20
</SPAN> <BR><SPAN style=3D"DISPLAY: none">ym5=10/=3D52=3D=07=20
</SPAN> <BR>// =
=B5=B1=C8=BB=A3=AC=D4=DA=CE=D2=C3=C7=B5=DA=D2=BB=B4=CE=B5=F7=D3=C3InsertD=
escriptor=A3=A8=A3=A9=BA=AF=CA=FD=B2=E5=C8=EB=B5=DA=D2=BB=B8=F6=C4=DA=B4=E6=
=BF=E9=B5=BD=C4=DA=B4=E6=C3=E8=CA=F6=B7=FB=C1=B4=B1=ED=D6=D0=CA=B1=CA=C7=B2=
=BB=BB=E1//=20
=
=D6=B4=D0=D0=B8=C3=D1=AD=BB=B7=CC=E5=B5=C4=A3=AC=D2=F2=CE=AA=B4=CB=CA=B1=D4=
=DAMemoryDescriptorList=D6=D0=BB=B9=C3=BB=D3=D0=C8=CE=BA=CE=B6=D4=C4=DA=B4=
=E6=BF=E9=B5=C4=C3=E8=CA=F6=CA=FD=BE=DD=A1=A3<SPAN=20
style=3D"DISPLAY: none"> h=1E-=1AK1=08'v </SPAN> <BR>//=20
=
=B8=C3=D1=AD=BB=B7=CC=E5=D6=F0=D2=BB=B1=C8=BD=CF=D2=D1=BE=AD=B4=E6=D4=DA=B5=
=C4=C4=DA=B4=E6=C3=E8=CA=F6=B7=FB=C3=E8=CA=F6=B5=C4=C4=DA=B4=E6=BF=E9=CA=C7=
=B7=F1=D3=EB=D2=AA=B2=E5=C8=EB=B5=C4=C4=DA=B4=E6=C3=E8=CA=F6=BF=E9=CF=E0=C1=
=D9=A3=AC=C8=E7=B9=FB=CA=C7=A3=AC=BA=CF// =
=B2=A2=CB=FB=C3=C7=A3=AC=C8=E7=B9=FB=B2=BB=CA=C7=CF=E0=C1=D9=B5=C4<SPAN=20
style=3D"DISPLAY: none"> JP=1BG J=1DM(O </SPAN> <BR> =
while=20
(CurrentEntry->BlockSize > 0) {<SPAN style=3D"DISPLAY: =
none"> =19|{P!C=20
#T. </SPAN> <BR> //<SPAN style=3D"DISPLAY: =
none">=20
>=05,=19i@lj2/ </SPAN> <BR>// =
=BC=EC=B2=E9=B8=C3=C4=DA=B4=E6=C3=E8=CA=F6=BF=E9=CA=C7=B7=F1=D3=EB=B5=B1=C7=
=B0=B5=C4=C4=DA=B4=E6=C3=E8=CA=F6=B7=FB=CB=F9=C3=E8=CA=F6=B5=C4=C4=DA=B4=E6=
=BF=E9=CA=C7=CF=E0=C1=D9=B5=C4=A3=AC=C8=E7=B9=FB=CA=C7=A3=AC=BA=CF=B2=A2=CB=
=FB=C3=C7.=20
(yes, // some machineswill return memory descriptors that look =
like this.=20
Compaq<SPAN style=3D"DISPLAY: none"> H:\V.K (`=3D =
</SPAN> <BR> =20
// Prosignia machines)<SPAN style=3D"DISPLAY: none"> =
QW=1C=1A +=02bH=12=20
</SPAN> <BR> //<SPAN style=3D"DISPLAY: none">=20
=073<WVA,y=07| </SPAN> <BR> if (Address+Size =
=3D=3D=20
CurrentEntry->BlockBase) {<SPAN style=3D"DISPLAY: none"> =
=12=10=1BVM4'9'H=20
</SPAN> <BR>#ifdef DEBUG1<SPAN style=3D"DISPLAY: none"> =
x=14=0Ex`Nv:`A=20
</SPAN> <BR> BlPrint(" coalescing =
with=20
descriptor at %lx (%lx)\n",<SPAN style=3D"DISPLAY: none"> =
\~o=14)Qk%n/=20
</SPAN> <BR> =20
CurrentEntry->BlockBase,<SPAN style=3D"DISPLAY: none"> =
J!/+\2M+a0=20
</SPAN> <BR> =20
CurrentEntry->BlockSize);<SPAN style=3D"DISPLAY: none"> =
^hV1}:6"\`=20
</SPAN> <BR>#endif<SPAN style=3D"DISPLAY: none"> 7 =
/=086j=1Fi=14/=20
</SPAN> <BR> =
CurrentEntry->BlockBase =3D=20
Address;<SPAN style=3D"DISPLAY: none"> npE=1F>V8=17so =
</SPAN> <BR> =20
CurrentEntry->BlockSize +=3D Size;<SPAN=20
style=3D"DISPLAY: none"> u'=1Ez=15{`"P=14 </SPAN> <BR>#ifdef =
DEBUG1<SPAN=20
style=3D"DISPLAY: none"> <=10_&z=0E,=1Dv =
</SPAN> <BR> =20
BlPrint(" new descriptor at %lx (%lx)\n",<SPAN=20
style=3D"DISPLAY: none"> =16Mx)W2=1A|=11Y </SPAN> <BR> =
=20
CurrentEntry->BlockBase,<SPAN=20
style=3D"DISPLAY: none"> 5 d{o=15=11{=1Cl </SPAN> <BR> =
=20
CurrentEntry->BlockSize);<SPAN=20
style=3D"DISPLAY: none"> XK{=05=17=18rY9' =
</SPAN> <BR>#endif<SPAN=20
style=3D"DISPLAY: none"> /u#X=1D=11>,j, </SPAN> <BR> =
=20
break;<SPAN style=3D"DISPLAY: none"> Lb"AJ.#fB=11=20
</SPAN> <BR> }<SPAN style=3D"DISPLAY: none"> =
li"=17!=0FE/l=20
</SPAN> <BR> if (Address =3D=3D =
(CurrentEntry->BlockBase=20
+ CurrentEntry->BlockSize)) {<SPAN style=3D"DISPLAY: none"> =
,-$OxAu=3D_+=20
</SPAN> <BR>#ifdef DEBUG1<SPAN style=3D"DISPLAY: none"> uq @] =
=1E\bO=20
</SPAN> <BR> BlPrint(" coalescing =
with=20
descriptor at %lx (%lx)\n",<SPAN style=3D"DISPLAY: none"> =
+9&nwU=17(ea=20
</SPAN> <BR> =20
CurrentEntry->BlockBase,<SPAN style=3D"DISPLAY: none"> i =
=10=0F~xB|m=20
</SPAN> <BR> =20
CurrentEntry->BlockSize);<SPAN style=3D"DISPLAY: none"> =
>]XE4V~J*|=20
</SPAN> <BR>#endif<SPAN style=3D"DISPLAY: none"> =
zT4a@=010=1F=08&=20
</SPAN> <BR> =
CurrentEntry->BlockSize +=3D=20
Size;<SPAN style=3D"DISPLAY: none"> C$"ASy]=16Y=17 =
</SPAN> <BR>#ifdef=20
DEBUG1<SPAN style=3D"DISPLAY: none"> R=18Rl=13g+p=0F~ =
</SPAN> <BR> =20
BlPrint(" new descriptor at %lx =
(%lx)\n",<SPAN=20
style=3D"DISPLAY: none"> yD^'Zov=18i </SPAN> <BR> =
=20
CurrentEntry->BlockBase,<SPAN=20
style=3D"DISPLAY: none"> F8=14{N!=1F?Xg </SPAN> <BR> =
=20
CurrentEntry->BlockSize);<SPAN=20
style=3D"DISPLAY: none"> K3/k$IT 9& =
</SPAN> <BR>#endif<SPAN=20
style=3D"DISPLAY: none"> kL\E21U.0: </SPAN> <BR> =
=20
break;<SPAN style=3D"DISPLAY: none"> K<SEB1(DNK=20
</SPAN> <BR> }<SPAN style=3D"DISPLAY: none"> =
z=12]/oA@=1A9'=20
</SPAN> <BR><SPAN style=3D"DISPLAY: none">3=16<.=14g:AI=13 =
</SPAN> <BR> CurrentEntry++;<SPAN =
style=3D"DISPLAY: none">=20
=06"+X%B:,{=04 </SPAN> <BR> }<SPAN style=3D"DISPLAY: =
none">=20
rjK7g-cLZ=11 </SPAN> <BR><SPAN style=3D"DISPLAY: =
none">&5w=06=1F=1B?Dd=20
</SPAN> <BR>// =
=B5=DA=D2=BB=B4=CE=B5=F7=D3=C3InsertDescriptor=A3=A8=A3=A9=BA=AF=CA=FD=B2=
=E5=C8=EB=B5=DA=D2=BB=B8=F6=C4=DA=B4=E6=BF=E9=B5=BD=C4=DA=B4=E6=C3=E8=CA=F6=
=B7=FB=C1=B4=B1=ED=CA=B1=BB=E1=D4=DA=D5=E2=C0=EF=D6=B4=D0=D0=A3=AC=B4=B4=BD=
=A8=CA=D7//=20
=
=B8=F6=B6=D4=C4=DA=B4=E6=BF=E9=C3=E8=CA=F6=B5=C4=C3=E8=CA=F6=B7=FB=A1=A3<=
SPAN style=3D"DISPLAY: none"> T"6'QE=1F'J=03=20
</SPAN> <BR>//<SPAN style=3D"DISPLAY: none"> =
@=1A&=0FV6yE>f=20
</SPAN> <BR>// =
=C8=E7=B9=FB=D2=AA=B2=E5=C8=EB=B5=C4=C4=DA=B4=E6=C3=E8=CA=F6=BF=E9=D3=EB=D2=
=D1=BE=AD=B4=E6=D4=DA=B5=C4=C3=E8=CA=F6=B7=FB=C3=E8=CA=F6=B5=C4=C4=DA=B4=E6=
=BF=E9=B2=A2=B2=BB=CF=E0=C1=D9=A3=AC=C4=C7=C3=B4=B4=B4=BD=A8=D0=C2=B5=C4=C3=
=E8=CA=F6=B7=FB=A3=AC=B2=A2=B4=B4=BD=A8//=20
=BD=E1=CA=F8=B5=E3<SPAN style=3D"DISPLAY: none"> =
=1021=1Fo=1F\Vj=0F </SPAN> <BR> if=20
(CurrentEntry->BlockSize =3D=3D 0) {<SPAN style=3D"DISPLAY: =
none"> aF=07=15hT,X3=15=20
</SPAN> <BR> //<SPAN style=3D"DISPLAY: none">=20
=19;5jw<=04=13=11e </SPAN> <BR> // If=20
CurrentEntry->BlockSize =3D=3D 0, we have reached the end of =
the list<SPAN=20
style=3D"DISPLAY: none"> )P];=11D|=10=0F </SPAN> <BR> =
// So,=20
insert the new descriptor here, and create a new end-of-list =
entry<SPAN=20
style=3D"DISPLAY: none"> =1C=0EcX=1DQ3=05` </SPAN> <BR> =
//<SPAN=20
style=3D"DISPLAY: none"> 1=17^=0E>=13}U[: =
</SPAN> <BR> =20
CurrentEntry->BlockBase =3D Address;<SPAN style=3D"DISPLAY: =
none"> S=20
J{KU< $c </SPAN> <BR> =
CurrentEntry->BlockSize =3D=20
Size;<SPAN style=3D"DISPLAY: none"> =154=08(=02H=01d=3D=15 =
</SPAN> <BR><SPAN=20
style=3D"DISPLAY: none">#^ :P V[Cr </SPAN> <BR> =20
++CurrentEntry;<SPAN style=3D"DISPLAY: none"> PS=3D?v: w98=20
</SPAN> <BR> //<SPAN style=3D"DISPLAY: none"> =
<=12=10Y=20
r*aXx </SPAN> <BR> // Create a new end-of-list=20
marker<SPAN style=3D"DISPLAY: none"> 'u=11}W^t8?! =
</SPAN> <BR> =20
//<SPAN style=3D"DISPLAY: none"> =1FQD=11=16`]1i =
</SPAN> <BR> =20
CurrentEntry->BlockBase =3D 0L;<SPAN style=3D"DISPLAY: =
none">=20
>=03=1C+E=13e0Zy </SPAN> <BR> =
CurrentEntry->BlockSize =3D=20
0L;<SPAN style=3D"DISPLAY: none"> [@=173BChM =
</SPAN> <BR> }<SPAN=20
style=3D"DISPLAY: none"> A=158=08=1DG=1EH =1E =
</SPAN> <BR>#ifdef DEBUG1<SPAN=20
style=3D"DISPLAY: none"> q `T4w;HSp </SPAN> <BR> =
//<SPAN=20
style=3D"DISPLAY: none"> jq8=0F'&CAl7 </SPAN> <BR> =
// Wait for=20
a keypress<SPAN style=3D"DISPLAY: none"> p=06=13-X{\w=06O =
</SPAN> <BR> =20
//<SPAN style=3D"DISPLAY: none"> Enh g=0FC'=11U =
</SPAN> <BR> =20
_asm {<SPAN style=3D"DISPLAY: none"> /7f/['. y3 =
</SPAN> <BR> =20
push ax<SPAN style=3D"DISPLAY: none"> =
=1EL;]5=1ES =13J=20
</SPAN> <BR> mov ax, 0<SPAN =
style=3D"DISPLAY: none"> TQ>|=18G49Bj </SPAN> <BR> =
=20
int 16h<SPAN style=3D"DISPLAY: none"> =
k'~=0F=07=18IY=1Fu=20
</SPAN> <BR> pop ax<SPAN=20
style=3D"DISPLAY: none"> =0EI 'ql!6nv </SPAN> <BR> =
}<SPAN=20
style=3D"DISPLAY: none"> =13"(Vc=1A{0U=1B =
</SPAN> <BR>#endif<SPAN=20
style=3D"DISPLAY: none"> $=08(z =162M|N </SPAN> <BR><SPAN=20
style=3D"DISPLAY: none">=11x=16Bo[ht=05< =
</SPAN> <BR>}<SPAN=20
style=3D"DISPLAY: none"> #>=15B UF=15`g </SPAN> <BR><SPAN=20
style=3D"DISPLAY: none">qe 'Q%1F=03=3D=20
=
</SPAN> <BR>=CD=A8=B9=FD=D5=E2=C1=BD=B8=F6=BA=AF=CA=FD=D4=AD=CA=BC=B5=
=C4=C4=DA=B4=E6=C3=E8=CA=F6=B7=FB=C1=B4=B1=ED=BE=CD=D0=CE=B3=C9=C1=CB=A3=BA=
=A3=A8=D2=D4Bochs=B5=F7=CA=D4=B3=F6=B5=C4=CE=AA=C0=FD=A3=A9<SPAN=20
style=3D"DISPLAY: none"> .ekKv=1F3|=16C </SPAN> <BR><SPAN=20
style=3D"DISPLAY: none">@RC>=3Dn ;qY=20
</SPAN> <BR>Address:00000000(00000000~0009FBFF)Size:639k; =
=20
Type:ARM<SPAN style=3D"DISPLAY: none"> K',@dF %@=20
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