txtsetup.sif文件SetupData节DisableAsr的值和setupldr!SlCheckASRKeypress函数的关系和检测F2键进入ASR
txtsetup.sif文件SetupData节DisableAsr的值和setupldr!SlCheckASRKeypress函数的关系和检测F2键进入ASR
SlCheckOemKeypress(OemKeypressTimeout);
{
PCSTR szOptionsToAdd = NULL;
CHAR szOptionsToRemove[sizeof("/noguiboot/nodebug")];
szOptionsToRemove[0] = 0;
//
// If F8 was pressed, add the debug options
//
if(EnableDebugger) {
if(InfFile != NULL) {
szOptionsToAdd = SlGetSectionKeyIndex(InfFile, "SetupData", "SetupDebugOptions", 0);
}
if(NULL == szOptionsToAdd) {
szOptionsToAdd = "/debug";
}
strcat(szOptionsToRemove, "/nodebug");
}
kd> x setupldr!EnableDebugger
00348b08 setupldr!EnableDebugger = 0x00 ''
kd> dv setupldr!IsUpgrade
setupldr!IsUpgrade = 0x00 ''
if (IsUpgrade) {
strcat(szOptionsToRemove, "/noguiboot");
}
//
// We need to check to see if the user pressed any keys to force loading,
// an ASR pnp repair disk. Only do this if the user didn't select
// anything in the SlCheckOemKeypress function.
//
if(!UseCommandConsole && !WinPEBoot && !IsUpgrade && !BlBootingFromNet) {
PCHAR pTmp;
pTmp = SlGetSectionKeyIndex(InfFile,
"SetupData",
"DisableAsr",
0);
if ((pTmp == NULL) || (atoi(pTmp) == 0)) {
SlCheckASRKeypress();
}
}
txtsetup.sif文件部分内容：
[SetupData]
SetupSourcePath = "\"
MajorVersion = 5
MinorVersion = 2
DefaultPath=\WINDOWS
SetupDebugOptions = "/debug"
OsLoadOptions = "/fastdetect /noguiboot /nodebug"
ForceScsi = 1
ForceDiskClass = 1
ForceCDRom = 1
Architecture = i386
DriverCabName=driver.cab
ProductType = 1
LoadIdentifier = %srv_id%
BaseVideoLoadId = %srv_id_vga%
RequiredMemory = 134217728
Pagefile = 120,250
kd> kc
#
00 setupldr!SlGetSectionKeyIndex
01 setupldr!SlInit
02 setupldr!BlStartup
03 setupldr!NtProcessStartup
WARNING: Frame IP not in any known module. Following frames may be wrong.
04 0x0
05 0x0
06 0x0
kd> dv
INFHandle = 0x8007b0d8
SectionName = 0x003255d0 "SetupData"
Key = 0x003255c4 "DisableAsr"
ValueIndex = 0
kd> db 0x8007b0d8
8007b0d8 b0 a8 21 80 00 00 00 00-56 65 72 73 69 6f 6e 00 ..!.....Version.
8007b0e8 73 69 67 6e 61 74 75 72-65 00 43 6c 61 73 73 47 signature.ClassG
8007b0f8 55 49 44 00 7b 30 30 30-30 30 30 30 30 2d 30 30 UID.{00000000-00
8007b108 30 30 2d 30 30 30 30 2d-30 30 30 30 2d 30 30 30 00-0000-0000-000
8007b118 30 30 30 30 30 30 30 30-30 7d 00 53 6f 75 72 63 000000000}.Sourc
8007b128 65 44 69 73 6b 73 4e 61-6d 65 73 00 5f 78 00 25 eDisksNames._x.%
8007b138 63 64 6e 61 6d 65 25 00-25 63 64 74 61 67 66 69 cdname%.%cdtagfi
8007b148 6c 65 25 00 5f 31 00 25-63 64 6e 61 6d 65 25 00 le%._1.%cdname%.
kd> gu
eax=00000000 ebx=00000000 ecx=003255c4 edx=00000048 esi=00000000 edi=003482a3
eip=00327288 esp=00060bc0 ebp=00060df4 iopl=0 nv up di pl zr na pe nc
cs=0008 ss=0010 ds=0010 es=0010 fs=0030 gs=0000 efl=00000046
setupldr!SlInit+0x1242:
00327288 3bc3 cmp eax,ebx
kd> kc 5
#
00 setupldr!SlCheckASRKeypress
01 setupldr!SlInit
02 setupldr!BlStartup
03 setupldr!NtProcessStartup
WARNING: Frame IP not in any known module. Following frames may be wrong.
04 0x0
kd> dv
FloppyId = 0x60df4
FirstTry = 0x00 ''
c = 0x32397c
FloppyName = char [80] "???"
ASRPNPSifHandle = 0x00000000
FileName = char [128] ""
Done = 0x00 ''
PromptASR = 0x00 ''
if (FirstTry) {
StatusText = BlFindMessage(SL_MSG_PRESS_ASR);
FirstTry = FALSE;
}
else {
StatusText = BlFindMessage(SL_MSG_PREPARING_ASR);
}
if (FirstTry) {
StatusText = BlFindMessage(SL_MSG_PRESS_ASR);
kd> p
eax=00384508 ebx=00000000 ecx=00382420 edx=00384504 esi=00000000 edi=003482a3
eip=003239c2 esp=00060acc ebp=00060bb8 iopl=0 nv up di pl zr na pe nc
cs=0008 ss=0010 ds=0010 es=0010 fs=0030 gs=0000 efl=00000046
setupldr!SlCheckASRKeypress+0x46:
003239c2 885dfd mov byte ptr [ebp-3],bl ss:0010:00060bb5=01
kd> db 00384508
00384508 50 72 65 73 73 20 46 32-20 74 6f 20 72 75 6e 20 Press F2 to run
00384518 41 75 74 6f 6d 61 74 65-64 20 53 79 73 74 65 6d Automated System
00384528 20 52 65 63 6f 76 65 72-79 20 28 41 53 52 29 2e Recovery (ASR).
00384538 2e 2e 0d 0a 00 00 00 00-b4 00 00 00 20 20 20 20 ............
if( StatusText != NULL ) {
SlWriteStatusText(StatusText);
}
Press F2 to run Automated System Recovery (ASR)...
do {
if(ArcGetReadStatus(ARC_CONSOLE_INPUT) == ESUCCESS) {
//
// There is a key pending, so see what it is.
//
c = SlGetChar();
switch(c) {
case SL_KEY_F2: // Force ASR prompt
PromptASR = TRUE;
Done = TRUE;
break;
case ASCI_ESC:
PromptASR = FALSE;
Done = TRUE;
break;
}
}
} while( !Done && (EndTime > ArcGetRelativeTime()) );
kd> g
Breakpoint 9 hit
eax=00013665 ebx=00000000 ecx=000000b6 edx=00000008 esi=00013665 edi=003482a3
eip=00329dfa esp=00060ac4 ebp=00060bb8 iopl=0 nv up di pl zr na pe nc
cs=0008 ss=0010 ds=0010 es=0010 fs=0030 gs=0000 efl=00000046
setupldr!SlWriteStatusText:
00329dfa 55 push ebp
kd> dv
Text = 0x00323966 ""
AttributeSave = 0xfa ''
Count = 8
kd> dv PromptASR
PromptASR = 0x00 ''
5秒钟的时间内检测到按键F2PromptASR = TRUE
没有检测到按键F2或检测到按键ESC则PromptASR = FALSE。