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[NTOS:EX] Clarify the situation with the SystemPathInformation class. (#4065)

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Since NT 3.51, this information class is trivially implemented.
The path to the NT directory is now stored in KUSER_SHARED_DATA
as the NtSystemRoot member.
Windows Checked builds show the following message and break to
the debugger before failing the function as not implemented:

EX: SystemPathInformation now available via SharedUserData

See https://www.geoffchappell.com/studies/windows/km/ntoskrnl/api/ex/sysinfo/query.htm
and https://www.geoffchappell.com/studies/windows/km/ntoskrnl/inc/api/ntexapi_x/kuser_shared_data/index.htm
for more information.
This commit is contained in:
Hermès Bélusca-Maïto 2021-10-24 18:57:52 +02:00
parent 1200561fcc
commit 712f469671
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1 changed files with 14 additions and 6 deletions
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20
ntoskrnl/ex/sysinfo.c
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@ -861,13 +861,21 @@ QSI_DEF(SystemTimeOfDayInformation)
return STATUS_SUCCESS;
}
/* Class 4 - Path Information */
/* Class 4 - Path Information (DEPRECATED) */
QSI_DEF(SystemPathInformation)
{
/* FIXME: QSI returns STATUS_BREAKPOINT. Why? */
DPRINT1("NtQuerySystemInformation - SystemPathInformation not implemented\n");
return STATUS_BREAKPOINT;
/*
* Since NT 3.51, this information class is trivially implemented.
* The path to the NT directory is now stored in KUSER_SHARED_DATA
* as the NtSystemRoot member.
* Windows Checked builds show the following message and break to
* the debugger before failing the function as not implemented.
*/
#if DBG
DPRINT1("EX: SystemPathInformation now available via SharedUserData\n");
// DbgBreakPoint(); // Not needed in ReactOS.
#endif
return STATUS_NOT_IMPLEMENTED;
}
/* Class 5 - Process Information */
@ -2830,7 +2838,7 @@ CallQS[] =
SI_QX(SystemProcessorInformation),
SI_QX(SystemPerformanceInformation),
SI_QX(SystemTimeOfDayInformation),
SI_QX(SystemPathInformation), /* should be SI_XX */
SI_QX(SystemPathInformation),
SI_QX(SystemProcessInformation),
SI_QX(SystemCallCountInformation),
SI_QX(SystemDeviceInformation),