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ACPI!ACPIDetectPdoDevices函数下半部分搜集关联信息

news 2026/5/11 17:32:11

ACPI!ACPIDetectPdoDevices函数下半部分搜集关联信息

0: kd> dv newRelationSize
newRelationSize = 5

PCI0
ACAD
CP00
CP01
ACPI\FixedButton


//
// Determine the size of the new relations. Use index as a
// scratch buffer
//
index = sizeof(DEVICE_RELATIONS) +
( sizeof(PDEVICE_OBJECT) * (newRelationSize - 1) );

//
// Allocate the new device relation buffer. Use nonpaged pool since we
// are at dispatch
//
newRelations = ExAllocatePoolWithTag(
NonPagedPool,
index,
ACPI_DEVICE_POOLTAG
);
if (newRelations == NULL) {

//
// Return failure
//
return STATUS_INSUFFICIENT_RESOURCES;

}

//
// Initialize DeviceRelations data structure
//
RtlZeroMemory( newRelations, index );


#define DEV_TYPE_NEVER_PRESENT 0x0000000000000001
#define DEV_TYPE_NOT_PRESENT 0x0000000000000002
#define DEV_TYPE_REMOVED 0x0000000000000004
#define DEV_TYPE_NOT_FOUND 0x0000000000000008
#define DEV_TYPE_FDO 0x0000000000000010
#define DEV_TYPE_PDO 0x0000000000000020
#define DEV_TYPE_FILTER 0x0000000000000040
#define DEV_TYPE_SURPRISE_REMOVED 0x0000000000000080
#define DEV_TYPE_NOT_ENUMERATED 0x0000000000000100

#define DEV_TYPE_PDO 0x0000000000000020
#define DEV_TYPE_NOT_PRESENT 0x0000000000000002
//
// Loop until we get back to the parent
//
while (deviceExtension != NULL) {

//
// The only objects that we care about are those that are marked as
// PDOs and have a phsyical object associated with them
//
if (deviceExtension->Flags & DEV_TYPE_PDO &&
deviceExtension->DeviceObject != NULL &&
!(deviceExtension->Flags & DEV_MASK_NOT_PRESENT) ) {

//
// We don't ObReferenceO here because we are still at
// dispatch level (and for efficiency's sake, we don't
// want to drop down)
//
newRelations->Objects[index] =
deviceExtension->DeviceObject;


0: kd> dt DEVICE_RELATIONS 899875a0
nt!DEVICE_RELATIONS
+0x000 Count : 0
+0x004 Objects : [1] 0x899050e8 _DEVICE_OBJECT
0: kd> dx -id 0,0,899a2278 -r1 (*((ntkrnlmp!_DEVICE_OBJECT * (*)[1])0x899875a4))
(*((ntkrnlmp!_DEVICE_OBJECT * (*)[1])0x899875a4)) [Type: _DEVICE_OBJECT * [1]]
[0] : 0x899050e8 : Device for "\Driver\ACPI" [Type: _DEVICE_OBJECT *]
0: kd> dd 899875a0
899875a0 00000000 899050e8 00000000 00000000
899875b0 00000000 00000000 02050004 46706341
899875c0 89987568 8997706c 00000000 00000001
899875d0 00000001 f740d62c 89907c70 899771c4
899875e0 00180005 46706341 80bf6229 80bf6229
899875f0 020b0002 50706341 8957e130 89900280
89987600 8993eb28 8993eb28 5f534750 8993ea28
89987610 02120006 46706341 898a8188 89961268
0: kd> r
eax=02010020 ebx=f743b620 ecx=00402000 edx=00402000 esi=899c0d58 edi=899875a0
eip=f7400533 esp=f789a220 ebp=f789a250 iopl=0 nv up ei pl zr na pe nc
cs=0008 ss=0010 ds=0023 es=0023 fs=0030 gs=0000 efl=00000246
ACPI!ACPIDetectPdoDevices+0x355:
f7400533 8b45f4 mov eax,dword ptr [ebp-0Ch] ss:0010:f789a244=00000001


//
// Check to see if we have found all the objects that we care
// about. As in, don't mess the system by walking past the end
// of the device relations
//
if (newRelationSize == index) { //下断点

//
// Done
//
break;

}


0: kd> bp f7400533
0: kd> g
Breakpoint 87 hit
eax=00000000 ebx=f743b620 ecx=2000010a edx=00000000 esi=899ae008 edi=899875a0
eip=f7400533 esp=f789a220 ebp=f789a250 iopl=0 nv up ei pl zr na pe nc
cs=0008 ss=0010 ds=0023 es=0023 fs=0030 gs=0000 efl=00000246
ACPI!ACPIDetectPdoDevices+0x355:
f7400533 8b45f4 mov eax,dword ptr [ebp-0Ch] ss:0010:f789a244=00000001
0: kd> dd 899875a0
899875a0 00000000 899050e8 00000000 00000000
899875b0 00000000 00000000 02050004 46706341
899875c0 89987568 8997706c 00000000 00000001
899875d0 00000001 f740d62c 89907c70 899771c4
899875e0 00180005 46706341 80bf6229 80bf6229
899875f0 020b0002 50706341 8957e130 89900280
89987600 8993eb28 8993eb28 5f534750 8993ea28
89987610 02120006 46706341 898a8188 89961268
0: kd> g
Breakpoint 87 hit
eax=00000000 ebx=f743b620 ecx=2000010a edx=00000000 esi=899aee58 edi=899875a0
eip=f7400533 esp=f789a220 ebp=f789a250 iopl=0 nv up ei pl zr na pe nc
cs=0008 ss=0010 ds=0023 es=0023 fs=0030 gs=0000 efl=00000246
ACPI!ACPIDetectPdoDevices+0x355:
f7400533 8b45f4 mov eax,dword ptr [ebp-0Ch] ss:0010:f789a244=00000001
0: kd> dd 899875a0
899875a0 00000000 899050e8 00000000 00000000
899875b0 00000000 00000000 02050004 46706341
899875c0 89987568 8997706c 00000000 00000001
899875d0 00000001 f740d62c 89907c70 899771c4
899875e0 00180005 46706341 80bf6229 80bf6229
899875f0 020b0002 50706341 8957e130 89900280
89987600 8993eb28 8993eb28 5f534750 8993ea28
89987610 02120006 46706341 898a8188 89961268
0: kd> g
Breakpoint 87 hit
eax=00000020 ebx=f743b620 ecx=00406000 edx=00406000 esi=899aec58 edi=899875a0
eip=f7400533 esp=f789a220 ebp=f789a250 iopl=0 nv up ei pl zr na pe nc
cs=0008 ss=0010 ds=0023 es=0023 fs=0030 gs=0000 efl=00000246
ACPI!ACPIDetectPdoDevices+0x355:
f7400533 8b45f4 mov eax,dword ptr [ebp-0Ch] ss:0010:f789a244=00000002
0: kd> dd 899875a0
899875a0 00000000 899050e8 89906690 00000000
899875b0 00000000 00000000 02050004 46706341
899875c0 89987568 8997706c 00000000 00000001
899875d0 00000001 f740d62c 89907c70 899771c4
899875e0 00180005 46706341 80bf6229 80bf6229
899875f0 020b0002 50706341 8957e130 89900280
89987600 8993eb28 8993eb28 5f534750 8993ea28
89987610 02120006 46706341 898a8188 89961268
0: kd> g
Breakpoint 87 hit
eax=00000000 ebx=f743b620 ecx=2037010a edx=00000000 esi=899aea40 edi=899875a0
eip=f7400533 esp=f789a220 ebp=f789a250 iopl=0 nv up ei pl zr na pe nc
cs=0008 ss=0010 ds=0023 es=0023 fs=0030 gs=0000 efl=00000246
ACPI!ACPIDetectPdoDevices+0x355:
f7400533 8b45f4 mov eax,dword ptr [ebp-0Ch] ss:0010:f789a244=00000002
0: kd> dd 899875a0
899875a0 00000000 899050e8 89906690 00000000
899875b0 00000000 00000000 02050004 46706341
899875c0 89987568 8997706c 00000000 00000001
899875d0 00000001 f740d62c 89907c70 899771c4
899875e0 00180005 46706341 80bf6229 80bf6229
899875f0 020b0002 50706341 8957e130 89900280
89987600 8993eb28 8993eb28 5f534750 8993ea28
89987610 02120006 46706341 898a8188 89961268
0: kd> g
Breakpoint 87 hit
eax=00300020 ebx=f743b620 ecx=8051e010 edx=8051e010 esi=899ab690 edi=899875a0
eip=f7400533 esp=f789a220 ebp=f789a250 iopl=0 nv up ei pl zr na pe nc
cs=0008 ss=0010 ds=0023 es=0023 fs=0030 gs=0000 efl=00000246
ACPI!ACPIDetectPdoDevices+0x355:
f7400533 8b45f4 mov eax,dword ptr [ebp-0Ch] ss:0010:f789a244=00000003
0: kd> dd 899875a0
899875a0 00000000 899050e8 89906690 8952a6c8
899875b0 00000000 00000000 02050004 46706341
899875c0 89987568 8997706c 00000000 00000001
899875d0 00000001 f740d62c 89907c70 899771c4
899875e0 00180005 46706341 80bf6229 80bf6229
899875f0 020b0002 50706341 8957e130 89900280
89987600 8993eb28 8993eb28 5f534750 8993ea28
89987610 02120006 46706341 898a8188 89961268
0: kd> g
Breakpoint 87 hit
eax=00000000 ebx=f743b620 ecx=2037010a edx=00000000 esi=8990eaf0 edi=899875a0
eip=f7400533 esp=f789a220 ebp=f789a250 iopl=0 nv up ei pl zr na pe nc
cs=0008 ss=0010 ds=0023 es=0023 fs=0030 gs=0000 efl=00000246
ACPI!ACPIDetectPdoDevices+0x355:
f7400533 8b45f4 mov eax,dword ptr [ebp-0Ch] ss:0010:f789a244=00000003
0: kd> dd 899875a0
899875a0 00000000 899050e8 89906690 8952a6c8
899875b0 00000000 00000000 02050004 46706341
899875c0 89987568 8997706c 00000000 00000001
899875d0 00000001 f740d62c 89907c70 899771c4
899875e0 00180005 46706341 80bf6229 80bf6229
899875f0 020b0002 50706341 8957e130 89900280
89987600 8993eb28 8993eb28 5f534750 8993ea28
89987610 02120006 46706341 898a8188 89961268
0: kd> g
Breakpoint 87 hit
eax=00000000 ebx=f743b620 ecx=6030010a edx=00000000 esi=8990e8d8 edi=899875a0
eip=f7400533 esp=f789a220 ebp=f789a250 iopl=0 nv up ei pl zr na pe nc
cs=0008 ss=0010 ds=0023 es=0023 fs=0030 gs=0000 efl=00000246
ACPI!ACPIDetectPdoDevices+0x355:
f7400533 8b45f4 mov eax,dword ptr [ebp-0Ch] ss:0010:f789a244=00000003
0: kd> dd 899875a0
899875a0 00000000 899050e8 89906690 8952a6c8
899875b0 00000000 00000000 02050004 46706341
899875c0 89987568 8997706c 00000000 00000001
899875d0 00000001 f740d62c 89907c70 899771c4
899875e0 00180005 46706341 80bf6229 80bf6229
899875f0 020b0002 50706341 8957e130 89900280
89987600 8993eb28 8993eb28 5f534750 8993ea28
89987610 02120006 46706341 898a8188 89961268
0: kd> g
Breakpoint 87 hit
eax=00300020 ebx=f743b620 ecx=8051e010 edx=8051e010 esi=89906008 edi=899875a0
eip=f7400533 esp=f789a220 ebp=f789a250 iopl=0 nv up ei pl zr na pe nc
cs=0008 ss=0010 ds=0023 es=0023 fs=0030 gs=0000 efl=00000246
ACPI!ACPIDetectPdoDevices+0x355:
f7400533 8b45f4 mov eax,dword ptr [ebp-0Ch] ss:0010:f789a244=00000004
0: kd> dd 899875a0
899875a0 00000000 899050e8 89906690 8952a6c8
899875b0 8952a858 00000000 02050004 46706341
899875c0 89987568 8997706c 00000000 00000001
899875d0 00000001 f740d62c 89907c70 899771c4
899875e0 00180005 46706341 80bf6229 80bf6229
899875f0 020b0002 50706341 8957e130 89900280
89987600 8993eb28 8993eb28 5f534750 8993ea28
89987610 02120006 46706341 898a8188 89961268
0: kd> g
Breakpoint 87 hit
eax=00360020 ebx=f743b620 ecx=0058a000 edx=0058a000 esi=89906ea0 edi=899875a0
eip=f7400533 esp=f789a220 ebp=f789a250 iopl=0 nv up ei pl zr na pe nc
cs=0008 ss=0010 ds=0023 es=0023 fs=0030 gs=0000 efl=00000246
ACPI!ACPIDetectPdoDevices+0x355:
f7400533 8b45f4 mov eax,dword ptr [ebp-0Ch] ss:0010:f789a244=00000005
0: kd> dd 899875a0
899875a0 00000000 899050e8 89906690 8952a6c8
899875b0 8952a858 8952a9e8 02050004 46706341
899875c0 89987568 8997706c 00000000 00000001
899875d0 00000001 f740d62c 89907c70 899771c4
899875e0 00180005 46706341 80bf6229 80bf6229
899875f0 020b0002 50706341 8957e130 89900280
89987600 8993eb28 8993eb28 5f534750 8993ea28
89987610 02120006 46706341 898a8188 89961268

//
// Update the size of the relations by the number of matches that we
// successfully made
//
newRelations->Count = index;
newRelationSize = index;


0: kd> dd 899875a0
899875a0 00000005 899050e8 89906690 8952a6c8
899875b0 8952a858 8952a9e8 02050004 46706341
0: kd> dt DEVICE_RELATIONS 899875a0
nt!DEVICE_RELATIONS
+0x000 Count : 5
+0x004 Objects : [1] 0x899050e8 _DEVICE_OBJECT


//
// We have to reference all of the objects that we added
//
index = (currentRelations != NULL ? currentRelations->Count : 0);
for (; index < newRelationSize; index++) {

//
// Attempt to reference the object
//
status = ObReferenceObjectByPointer(
newRelations->Objects[index],
0,
NULL,
KernelMode
);

//
// Update the device relation pointer
//
*DeviceRelations = newRelations;

//
// Done
//
return STATUS_SUCCESS;
}


0: kd> dv DeviceRelations
DeviceRelations = 0xf789a2a4
0: kd> dx -r1 ((ACPI!_DEVICE_RELATIONS * *)0xf789a2a4)
((ACPI!_DEVICE_RELATIONS * *)0xf789a2a4) : 0xf789a2a4 [Type: _DEVICE_RELATIONS * *]
0x899875a0 [Type: _DEVICE_RELATIONS *]
0: kd> dx -r1 ((ACPI!_DEVICE_RELATIONS *)0x899875a0)
((ACPI!_DEVICE_RELATIONS *)0x899875a0) : 0x899875a0 [Type: _DEVICE_RELATIONS *]
[+0x000] Count : 0x5 [Type: unsigned long]
[+0x004] Objects [Type: _DEVICE_OBJECT * [1]]

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