64 bit GDT triple faulting [SOLVED]

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core2extreme
Posts: 12
Joined: Thu Mar 06, 2025 5:21 pm

64 bit GDT triple faulting [SOLVED]

Post by core2extreme »

Hello, i am making a 64 bit kernel with Limine,
I am trying to load the GDT, but the CPU triple faults when moving 0x10 into DS.
Here is my code:

Code: Select all

section .rodata
gdtStart:
        dq 0

        ; Code Segment
        dw 0xFFFF
        dw 0
        db 0
        db 0b10011010
        db 0b10100000
        db 0
        ; Data Segment
        dw 0xFFFF
        dw 0
        db 0

        db 0b10010010
        db 0b10000000
        db 0

	; User Code Segment
        dw 0xFFFF
        dw 0
        db 0
        db 0b11111010
        db 0b10100000
        db 0
        ; User Data Segment
        dw 0xFFFF
        dw 0
        db 0
        db 0b11110010
        db 0b10000000
        db 0

gdtEnd:

gdtDescriptor:
        dw gdtEnd - gdtStart - 1
        dq gdtStart

section .text
global initGDT

initGDT:
        cli
        lgdt [gdtDescriptor]
        mov ax, 0x10
	mov ds, ax
	mov es, ax
	mov fs, ax
	mov gs, ax
	mov ss, ax
	mov rax, 0x08
	pop rdi
	push rax
	push rdi
	retfq
Any help would be greatly appreciated.
Last edited by core2extreme on Sat Jun 21, 2025 12:00 pm, edited 1 time in total.
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Octocontrabass
Member
Member
Posts: 5873
Joined: Mon Mar 25, 2013 7:01 pm

Re: 64 bit GDT triple faulting

Post by Octocontrabass »

core2extreme wrote: ↑Thu Jun 19, 2025 12:13 pmI am trying to load the GDT, but the CPU triple faults when moving 0x10 into DS.
Do you have any more information about that triple fault? For example, QEMU's interrupt log ("-d int") can tell you which exceptions occur right before the triple fault, which might help you figure out what's wrong.
core2extreme wrote: ↑Thu Jun 19, 2025 12:13 pm

Code: Select all

section .rodata

Code: Select all

        db 0b10010010
For example, you might find that it's a page fault caused by the CPU trying to write to this descriptor located in a read-only page because the accessed bit is clear. Since you haven't set up an IDT yet, the page fault causes additional faults and eventually a triple fault.
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core2extreme
Posts: 12
Joined: Thu Mar 06, 2025 5:21 pm

Re: 64 bit GDT triple faulting

Post by core2extreme »

Octocontrabass wrote: ↑Thu Jun 19, 2025 7:39 pm
core2extreme wrote: ↑Thu Jun 19, 2025 12:13 pmI am trying to load the GDT, but the CPU triple faults when moving 0x10 into DS.
Do you have any more information about that triple fault? For example, QEMU's interrupt log ("-d int") can tell you which exceptions occur right before the triple fault, which might help you figure out what's wrong.
core2extreme wrote: ↑Thu Jun 19, 2025 12:13 pm

Code: Select all

section .rodata

Code: Select all

        db 0b10010010
For example, you might find that it's a page fault caused by the CPU trying to write to this descriptor located in a read-only page because the accessed bit is clear. Since you haven't set up an IDT yet, the page fault causes additional faults and eventually a triple fault.
Hello, these are the logs around the time of the fault, at least i think so because there were a lot of logs.

Code: Select all

SMM: enter
EAX=000000b5 EBX=00007e28 ECX=00005678 EDX=00000002
ESI=00000000 EDI=000edef4 EBP=0000fe54 ESP=000e8e54
EIP=000f7e25 EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000f61e0 00000037
IDT=     000f621e 00000000
CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=000000f0 CCD=000e8e40 CCO=ADDL
EFER=0000000000000000
SMM: after RSM
EAX=000000b5 EBX=00007e28 ECX=00005678 EDX=00000002
ESI=00000000 EDI=000edef4 EBP=0000fe54 ESP=000e8e54
EIP=00007e28 EFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =d900 000d9000 0000ffff 00009300
CS =f000 000f0000 0000ffff 00009b00
SS =d900 000d9000 0000ffff 00009300
DS =d900 000d9000 0000ffff 00009300
FS =0000 00000000 0000ffff 00009300
GS =0000 00000000 0000ffff 00009300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     00014dd8 00000037
IDT=     00000000 000003ff
CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000004 CCD=00000001 CCO=EFLAGS
EFER=0000000000000000
SMM: enter
EAX=000000b5 EBX=000f7e0e ECX=00001234 EDX=000e8eff
ESI=000e8e80 EDI=000edef4 EBP=0000fe54 ESP=000e8e54
EIP=00007e0b EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =d900 000d9000 0000ffff 00009300
CS =f000 000f0000 0000ffff 00009b00
SS =d900 000d9000 0000ffff 00009300
DS =d900 000d9000 0000ffff 00009300
FS =0000 00000000 0000ffff 00009300
GS =0000 00000000 0000ffff 00009300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     00014dd8 00000037
IDT=     00000000 000003ff
CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=000d9000 CCD=000e8e54 CCO=ADDL
EFER=0000000000000000
SMM: after RSM
EAX=000000b5 EBX=000f7e0e ECX=00001234 EDX=000e8eff
ESI=000e8e80 EDI=000edef4 EBP=0000fe54 ESP=000e8e54
EIP=000f7e0e EFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000f61e0 00000037
IDT=     000f621e 00000000
CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000044 CCD=00000000 CCO=EFLAGS
EFER=0000000000000000
SMM: enter
EAX=000000b5 EBX=00006230 ECX=00005678 EDX=00000000
ESI=00000000 EDI=000d9000 EBP=00008a0e ESP=0000fd1c
EIP=000eb813 EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000f61e0 00000037
IDT=     000f621e 00000000
CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=000d9000 CCD=0000fd1c CCO=SUBL
EFER=0000000000000000
SMM: after RSM
EAX=000000b5 EBX=00006230 ECX=00005678 EDX=00000000
ESI=00000000 EDI=000d9000 EBP=00008a0e ESP=0000fd1c
EIP=00006230 EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =d900 000d9000 0000ffff 00009300
CS =f000 000f0000 0000ffff 00009b00
SS =d900 000d9000 0000ffff 00009300
DS =d900 000d9000 0000ffff 00009300
FS =0000 00000000 0000ffff 00009300
GS =0000 00000000 0000ffff 00009300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     00014dd8 00000037
IDT=     00000000 000003ff
CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000000 CCD=00000001 CCO=EFLAGS
EFER=0000000000000000
Servicing hardware INT=0x09
SMM: enter
EAX=000000b5 EBX=000eb816 ECX=00001234 EDX=000000ff
ESI=00000000 EDI=000d9000 EBP=00008a0e ESP=0000fd1c
EIP=00006253 EFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =d900 000d9000 0000ffff 00009300
CS =f000 000f0000 0000ffff 00009b00
SS =d900 000d9000 0000ffff 00009300
DS =d900 000d9000 0000ffff 00009300
FS =0000 00000000 0000ffff 00009300
GS =0000 00000000 0000ffff 00009300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     00014dd8 00000037
IDT=     00000000 000003ff
CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000008 CCD=0000fcfc CCO=ADDL
EFER=0000000000000000
SMM: after RSM
EAX=000000b5 EBX=000eb816 ECX=00001234 EDX=000000ff
ESI=00000000 EDI=000d9000 EBP=00008a0e ESP=0000fd1c
EIP=000eb816 EFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000f61e0 00000037
IDT=     000f621e 00000000
CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000044 CCD=00000000 CCO=EFLAGS
EFER=0000000000000000
SMM: enter
EAX=000000b5 EBX=00007e28 ECX=00005678 EDX=00000002
ESI=00000000 EDI=000edef4 EBP=0000fe54 ESP=000e8e54
EIP=000f7e25 EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000f61e0 00000037
IDT=     000f621e 00000000
CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=000000f0 CCD=000e8e40 CCO=ADDL
EFER=0000000000000000
SMM: after RSM
EAX=000000b5 EBX=00007e28 ECX=00005678 EDX=00000002
ESI=00000000 EDI=000edef4 EBP=0000fe54 ESP=000e8e54
EIP=00007e28 EFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =d900 000d9000 0000ffff 00009300
CS =f000 000f0000 0000ffff 00009b00
SS =d900 000d9000 0000ffff 00009300
DS =d900 000d9000 0000ffff 00009300
FS =0000 00000000 0000ffff 00009300
GS =0000 00000000 0000ffff 00009300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     00014dd8 00000037
IDT=     00000000 000003ff
CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000004 CCD=00000001 CCO=EFLAGS
EFER=0000000000000000
Servicing hardware INT=0x08
check_exception old: 0xffffffff new 0xe
     0: v=0e e=0003 i=0 cpl=0 IP=0028:ffffffff800054dd pc=ffffffff800054dd SP=0030:ffff80007ff87fc8 CR2=ffffffff80009ba0
RAX=0000000000000010 RBX=0000000000000008 RCX=0000000000000020 RDX=0000000000000000
RSI=0000000000000002 RDI=0000000000000009 RBP=ffff80007ff87ff0 RSP=ffff80007ff87fc8
R8 =0000000000000000 R9 =00000000000000aa R10=0000000000000008 R11=0000000000000009
R12=0000000000000000 R13=0000000000000000 R14=0000000000000008 R15=0000000000000000
RIP=ffffffff800054dd RFL=00000082 [--S----] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0030 0000000000000000 00000000 00009300 DPL=0 DS   [-WA]
CS =0028 0000000000000000 00000000 00209b00 DPL=0 CS64 [-RA]
SS =0030 0000000000000000 00000000 00009300 DPL=0 DS   [-WA]
DS =0030 0000000000000000 00000000 00009300 DPL=0 DS   [-WA]
FS =0030 0000000000000000 00000000 00009300 DPL=0 DS   [-WA]
GS =0030 0000000000000000 00000000 00009300 DPL=0 DS   [-WA]
LDT=0000 0000000000000000 00000000 00008200 DPL=0 LDT
TR =0000 0000000000000000 0000ffff 00008b00 DPL=0 TSS64-busy
GDT=     ffffffff80009b8c 00000027
IDT=     0000000000000000 00000000
CR0=80010011 CR2=ffffffff80009ba0 CR3=000000007ff77000 CR4=00000020
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=0000000000000038 CCD=ffff80007ff87f98 CCO=ADDQ
EFER=0000000000000d00
check_exception old: 0xe new 0xd
     1: v=08 e=0000 i=0 cpl=0 IP=0028:ffffffff800054dd pc=ffffffff800054dd SP=0030:ffff80007ff87fc8 env->regs[R_EAX]=0000000000000010
RAX=0000000000000010 RBX=0000000000000008 RCX=0000000000000020 RDX=0000000000000000
RSI=0000000000000002 RDI=0000000000000009 RBP=ffff80007ff87ff0 RSP=ffff80007ff87fc8
R8 =0000000000000000 R9 =00000000000000aa R10=0000000000000008 R11=0000000000000009
R12=0000000000000000 R13=0000000000000000 R14=0000000000000008 R15=0000000000000000
RIP=ffffffff800054dd RFL=00000082 [--S----] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0030 0000000000000000 00000000 00009300 DPL=0 DS   [-WA]
CS =0028 0000000000000000 00000000 00209b00 DPL=0 CS64 [-RA]
SS =0030 0000000000000000 00000000 00009300 DPL=0 DS   [-WA]
DS =0030 0000000000000000 00000000 00009300 DPL=0 DS   [-WA]
FS =0030 0000000000000000 00000000 00009300 DPL=0 DS   [-WA]
GS =0030 0000000000000000 00000000 00009300 DPL=0 DS   [-WA]
LDT=0000 0000000000000000 00000000 00008200 DPL=0 LDT
TR =0000 0000000000000000 0000ffff 00008b00 DPL=0 TSS64-busy
GDT=     ffffffff80009b8c 00000027
IDT=     0000000000000000 00000000
CR0=80010011 CR2=ffffffff80009ba0 CR3=000000007ff77000 CR4=00000020
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=0000000000000038 CCD=ffff80007ff87f98 CCO=ADDQ
EFER=0000000000000d00
check_exception old: 0x8 new 0xd
SMM: enter
EAX=00000000 EBX=00000000 ECX=00000010 EDX=000f8000
ESI=000000f8 EDI=00000000 EBP=000f0630 ESP=00006c5c
EIP=000ea6dd EFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00cf9300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00cf9b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00cf9300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00cf9300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00cf9300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00cf9300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000f61e0 00000037
IDT=     000f621e 00000000
CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000044 CCD=b00f80a0 CCO=EFLAGS
EFER=0000000000000000
SMM: after RSM
EAX=00000000 EBX=00000000 ECX=00000010 EDX=000f8000
ESI=000000f8 EDI=00000000 EBP=000f0630 ESP=00006c5c
EIP=000ea6dd EFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000f61e0 00000037
IDT=     000f621e 00000000
CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000044 CCD=00000000 CCO=EFLAGS
EFER=0000000000000000
Servicing hardware INT=0x08
SMM: enter
EAX=000000b5 EBX=000f7e0e ECX=00001234 EDX=00006cff
ESI=00006cb4 EDI=7effeca6 EBP=00006c74 ESP=00006c74
EIP=00007e0b EFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =d900 000d9000 ffffffff 008f9300
CS =f000 000f0000 ffffffff 008f9b00
SS =0000 00000000 ffffffff 008f9300
DS =0000 00000000 ffffffff 008f9300
FS =0000 00000000 ffffffff 008f9300
GS =0000 00000000 ffffffff 008f9300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     00000000 00000000
IDT=     00000000 000003ff
CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000000 CCD=00006c74 CCO=ADDL
EFER=0000000000000000
SMM: after RSM
EAX=000000b5 EBX=000f7e0e ECX=00001234 EDX=00006cff
ESI=00006cb4 EDI=7effeca6 EBP=00006c74 ESP=00006c74
EIP=000f7e0e EFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000f61e0 00000037
IDT=     000f621e 00000000
CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000044 CCD=00000000 CCO=EFLAGS
EFER=0000000000000000
SMM: enter
EAX=000000b5 EBX=00007e28 ECX=00005678 EDX=7efe90d0
ESI=000e8440 EDI=7effeca6 EBP=00006c74 ESP=00006c74
EIP=000f7e25 EFL=00000016 [----AP-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000f61e0 00000037
IDT=     000f621e 00000000
CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000008 CCD=00006c60 CCO=ADDL
EFER=0000000000000000
SMM: after RSM
EAX=000000b5 EBX=00007e28 ECX=00005678 EDX=7efe90d0
ESI=000e8440 EDI=7effeca6 EBP=00006c74 ESP=00006c74
EIP=00007e28 EFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =d900 000d9000 ffffffff 00809300
CS =f000 000f0000 ffffffff 00809b00
SS =0000 00000000 ffffffff 00809300
DS =0000 00000000 ffffffff 00809300
FS =0000 00000000 ffffffff 00809300
GS =0000 00000000 ffffffff 00809300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     00000000 00000000
IDT=     00000000 000003ff
CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000004 CCD=00000001 CCO=EFLAGS
EFER=0000000000000000
Servicing hardware INT=0x08
Servicing hardware INT=0x08
SMM: enter
EAX=000000b5 EBX=000f7e0e ECX=00001234 EDX=000069ff
ESI=00006996 EDI=7effeca6 EBP=00006956 ESP=00006956
EIP=00007e0b EFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =d900 000d9000 ffffffff 008f9300
CS =f000 000f0000 ffffffff 008f9b00
SS =0000 00000000 ffffffff 008f9300
DS =0000 00000000 ffffffff 008f9300
FS =0000 00000000 ffffffff 008f9300
GS =ca00 000ca000 ffffffff 008f9300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     00000000 00000000
IDT=     00000000 000003ff
CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000000 CCD=00006956 CCO=ADDL
EFER=0000000000000000
SMM: after RSM
EAX=000000b5 EBX=000f7e0e ECX=00001234 EDX=000069ff
ESI=00006996 EDI=7effeca6 EBP=00006956 ESP=00006956
EIP=000f7e0e EFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000f61e0 00000037
IDT=     000f621e 00000000
CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000044 CCD=00000000 CCO=EFLAGS
EFER=0000000000000000
SMM: enter
EAX=000000b5 EBX=00007e28 ECX=00005678 EDX=00000005
ESI=00000000 EDI=7effeca6 EBP=00006956 ESP=00006956
EIP=000f7e25 EFL=00000016 [----AP-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000f61e0 00000037
IDT=     000f621e 00000000
CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000008 CCD=00006942 CCO=ADDL
EFER=0000000000000000
SMM: after RSM
EAX=000000b5 EBX=00007e28 ECX=00005678 EDX=00000005
ESI=00000000 EDI=7effeca6 EBP=00006956 ESP=00006956
EIP=00007e28 EFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =d900 000d9000 ffffffff 00809300
CS =f000 000f0000 ffffffff 00809b00
SS =0000 00000000 ffffffff 00809300
DS =0000 00000000 ffffffff 00809300
FS =0000 00000000 ffffffff 00809300
GS =ca00 000ca000 ffffffff 00809300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     00000000 00000000
IDT=     00000000 000003ff
CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000004 CCD=00000001 CCO=EFLAGS
EFER=0000000000000000
SMM: enter
EAX=000000b5 EBX=000f7e0e ECX=00001234 EDX=000069ff
ESI=00006990 EDI=7effeca6 EBP=00006950 ESP=00006950
EIP=00007e0b EFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =d900 000d9000 ffffffff 00809300
CS =f000 000f0000 ffffffff 00809b00
SS =0000 00000000 ffffffff 00809300
DS =0000 00000000 ffffffff 00809300
FS =0000 00000000 ffffffff 00809300
GS =ca00 000ca000 ffffffff 00809300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     00000000 00000000
IDT=     00000000 000003ff
CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000000 CCD=00006950 CCO=ADDL
EFER=0000000000000000
SMM: after RSM
EAX=000000b5 EBX=000f7e0e ECX=00001234 EDX=000069ff
ESI=00006990 EDI=7effeca6 EBP=00006950 ESP=00006950
EIP=000f7e0e EFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000f61e0 00000037
IDT=     000f621e 00000000
CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000044 CCD=00000000 CCO=EFLAGS
EFER=0000000000000000
SMM: enter
EAX=000000b5 EBX=00007e28 ECX=00005678 EDX=00000003
ESI=7efd0e40 EDI=7effeca6 EBP=00006950 ESP=00006950
EIP=000f7e25 EFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000f61e0 00000037
IDT=     000f621e 00000000
CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000008 CCD=0000693c CCO=ADDL
EFER=0000000000000000
SMM: after RSM
EAX=000000b5 EBX=00007e28 ECX=00005678 EDX=00000003
ESI=7efd0e40 EDI=7effeca6 EBP=00006950 ESP=00006950
EIP=00007e28 EFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =d900 000d9000 ffffffff 00809300
CS =f000 000f0000 ffffffff 00809b00
SS =0000 00000000 ffffffff 00809300
DS =0000 00000000 ffffffff 00809300
FS =0000 00000000 ffffffff 00809300
GS =ca00 000ca000 ffffffff 00809300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     00000000 00000000
IDT=     00000000 000003ff
CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000004 CCD=00000001 CCO=EFLAGS
EFER=0000000000000000
SMM: enter
EAX=000000b5 EBX=000f7e0e ECX=00001234 EDX=000069ff
ESI=00006996 EDI=7effeca6 EBP=00006956 ESP=00006956
EIP=00007e0b EFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =d900 000d9000 ffffffff 00809300
CS =f000 000f0000 ffffffff 00809b00
SS =0000 00000000 ffffffff 00809300
DS =0000 00000000 ffffffff 00809300
FS =0000 00000000 ffffffff 00809300
GS =ca00 000ca000 ffffffff 00809300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     00000000 00000000
IDT=     00000000 000003ff
CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000000 CCD=00006956 CCO=ADDL
EFER=0000000000000000
SMM: after RSM
EAX=000000b5 EBX=000f7e0e ECX=00001234 EDX=000069ff
ESI=00006996 EDI=7effeca6 EBP=00006956 ESP=00006956
EIP=000f7e0e EFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000f61e0 00000037
IDT=     000f621e 00000000
CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000044 CCD=00000000 CCO=EFLAGS
EFER=0000000000000000
SMM: enter
EAX=000000b5 EBX=00007e28 ECX=00005678 EDX=00000005
ESI=00000000 EDI=7effeca6 EBP=00006956 ESP=00006956
EIP=000f7e25 EFL=00000016 [----AP-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000f61e0 00000037
IDT=     000f621e 00000000
CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000008 CCD=00006942 CCO=ADDL
EFER=0000000000000000
SMM: after RSM
EAX=000000b5 EBX=00007e28 ECX=00005678 EDX=00000005
ESI=00000000 EDI=7effeca6 EBP=00006956 ESP=00006956
EIP=00007e28 EFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =d900 000d9000 ffffffff 00809300
CS =f000 000f0000 ffffffff 00809b00
SS =0000 00000000 ffffffff 00809300
DS =0000 00000000 ffffffff 00809300
FS =0000 00000000 ffffffff 00809300
GS =ca00 000ca000 ffffffff 00809300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     00000000 00000000
IDT=     00000000 000003ff
CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000004 CCD=00000001 CCO=EFLAGS
EFER=0000000000000000
SMM: enter
EAX=000000b5 EBX=000f7e0e ECX=00001234 EDX=000069ff
ESI=00006990 EDI=7effeca6 EBP=00006950 ESP=00006950
EIP=00007e0b EFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =d900 000d9000 ffffffff 00809300
CS =f000 000f0000 ffffffff 00809b00
SS =0000 00000000 ffffffff 00809300
DS =0000 00000000 ffffffff 00809300
FS =0000 00000000 ffffffff 00809300
GS =ca00 000ca000 ffffffff 00809300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     00000000 00000000
IDT=     00000000 000003ff
CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000000 CCD=00006950 CCO=ADDL
EFER=0000000000000000
SMM: after RSM
EAX=000000b5 EBX=000f7e0e ECX=00001234 EDX=000069ff
ESI=00006990 EDI=7effeca6 EBP=00006950 ESP=00006950
EIP=000f7e0e EFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000f61e0 00000037
IDT=     000f621e 00000000
CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000044 CCD=00000000 CCO=EFLAGS
EFER=0000000000000000
SMM: enter
EAX=000000b5 EBX=00007e28 ECX=00005678 EDX=00000003
ESI=7ef30e40 EDI=7effeca6 EBP=00006950 ESP=00006950
EIP=000f7e25 EFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000f61e0 00000037
IDT=     000f621e 00000000
CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000008 CCD=0000693c CCO=ADDL
EFER=0000000000000000
SMM: after RSM
EAX=000000b5 EBX=00007e28 ECX=00005678 EDX=00000003
ESI=7ef30e40 EDI=7effeca6 EBP=00006950 ESP=00006950
EIP=00007e28 EFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =d900 000d9000 ffffffff 00809300
CS =f000 000f0000 ffffffff 00809b00
SS =0000 00000000 ffffffff 00809300
DS =0000 00000000 ffffffff 00809300
FS =0000 00000000 ffffffff 00809300
GS =ca00 000ca000 ffffffff 00809300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     00000000 00000000
IDT=     00000000 000003ff
CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000004 CCD=00000001 CCO=EFLAGS
EFER=0000000000000000
Servicing hardware INT=0x08
SMM: enter
EAX=000000b5 EBX=000f7e0e ECX=00001234 EDX=000e8eff
ESI=000e8e80 EDI=000edef4 EBP=0000fe54 ESP=000e8e54
EIP=00007e0b EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =d900 000d9000 0000ffff 00009300
CS =f000 000f0000 0000ffff 00009b00
SS =d900 000d9000 0000ffff 00009300
DS =d900 000d9000 0000ffff 00009300
FS =0000 00000000 0000ffff 00009300
GS =0000 00000000 0000ffff 00009300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     00000000 00000000
IDT=     00000000 000003ff
CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=000d9000 CCD=000e8e54 CCO=ADDL
EFER=0000000000000000
SMM: after RSM
EAX=000000b5 EBX=000f7e0e ECX=00001234 EDX=000e8eff
ESI=000e8e80 EDI=000edef4 EBP=0000fe54 ESP=000e8e54
EIP=000f7e0e EFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000f61e0 00000037
IDT=     000f621e 00000000
CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000044 CCD=00000000 CCO=EFLAGS
EFER=0000000000000000
SMM: enter
EAX=000000b5 EBX=00006230 ECX=00005678 EDX=00000000
ESI=00000000 EDI=000d9000 EBP=00008a0e ESP=0000fd1c
EIP=000eb813 EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000f61e0 00000037
IDT=     000f621e 00000000
CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=000d9000 CCD=0000fd1c CCO=SUBL
EFER=0000000000000000
SMM: after RSM
EAX=000000b5 EBX=00006230 ECX=00005678 EDX=00000000
ESI=00000000 EDI=000d9000 EBP=00008a0e ESP=0000fd1c
EIP=00006230 EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =d900 000d9000 0000ffff 00009300
CS =f000 000f0000 0000ffff 00009b00
SS =d900 000d9000 0000ffff 00009300
DS =d900 000d9000 0000ffff 00009300
FS =0000 00000000 0000ffff 00009300
GS =0000 00000000 0000ffff 00009300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     00000000 00000000
IDT=     00000000 000003ff
CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000000 CCD=00000001 CCO=EFLAGS
EFER=0000000000000000
SMM: enter
EAX=000000b5 EBX=000eb816 ECX=00001234 EDX=000000ff
ESI=00000000 EDI=000d9000 EBP=00008a0e ESP=0000fd1c
EIP=00006253 EFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =d900 000d9000 0000ffff 00009300
CS =f000 000f0000 0000ffff 00009b00
SS =d900 000d9000 0000ffff 00009300
DS =d900 000d9000 0000ffff 00009300
FS =0000 00000000 0000ffff 00009300
GS =0000 00000000 0000ffff 00009300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     00000000 00000000
IDT=     00000000 000003ff
CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000008 CCD=0000fcfc CCO=ADDL
EFER=0000000000000000
SMM: after RSM
EAX=000000b5 EBX=000eb816 ECX=00001234 EDX=000000ff
ESI=00000000 EDI=000d9000 EBP=00008a0e ESP=0000fd1c
EIP=000eb816 EFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000f61e0 00000037
IDT=     000f621e 00000000
CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000044 CCD=00000000 CCO=EFLAGS
EFER=0000000000000000
SMM: enter
EAX=000000b5 EBX=00007e28 ECX=00005678 EDX=00000002
ESI=00000000 EDI=000edef4 EBP=0000fe54 ESP=000e8e54
EIP=000f7e25 EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
CS =0008 00000000 ffffffff 00c09b00 DPL=0 CS32 [-RA]
SS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
DS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
FS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
GS =0010 00000000 ffffffff 00c09300 DPL=0 DS   [-WA]
LDT=0000 00000000 0000ffff 00008200 DPL=0 LDT
TR =0000 00000000 0000ffff 00008b00 DPL=0 TSS32-busy
GDT=     000f61e0 00000037
IDT=     000f621e 00000000
CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=000000f0 CCD=000e8e40 CCO=ADDL
EFER=0000000000000000
SMM: after RSM
EAX=000000b5 EBX=00007e28 ECX=00005678 EDX=00000002
ESI=00000000 EDI=000edef4 EBP=0000fe54 ESP=000e8e54
EIP=00007e28 EFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =d900 000d9000 0000ffff 00009300
CS =f000 000f0000 0000ffff 00009b00
SS =d900 000d9000 0000ffff 00009300
DS =d900 000d9000 0000ffff 00009300
FS =0000 00000000 0000ffff 00009300
GS =0000 00000000 0000ffff 00009300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT=     00000000 00000000
IDT=     00000000 000003ff
CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000ffff0ff0 DR7=0000000000000400
CCS=00000004 CCD=00000001 CCO=EFLAGS
EFER=0000000000000000
Top
Octocontrabass
Member
Member
Posts: 5873
Joined: Mon Mar 25, 2013 7:01 pm

Re: 64 bit GDT triple faulting

Post by Octocontrabass »

core2extreme wrote: ↑Fri Jun 20, 2025 11:13 am

Code: Select all

check_exception old: 0xffffffff new 0xe
     0: v=0e e=0003
It's a page fault caused by writing to a page where writes are not allowed.
core2extreme wrote: ↑Fri Jun 20, 2025 11:13 am

Code: Select all

GDT=     ffffffff80009b8c 00000027
IDT=     0000000000000000 00000000
CR0=80010011 CR2=ffffffff80009ba0
The faulting address is 0x14 bytes past the start of your GDT.

So, yes, the CPU is trying to set the "accessed" bit in your data segment descriptor. You can fix it by setting the "accessed" bit before you tell the CPU to use the descriptor:

Code: Select all

db 0b10010011
If the bit is already set, the CPU won't try to write to the read-only page. Make sure you set this bit in your other segment descriptors too, otherwise they'll also cause page faults when you try to use them.
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core2extreme
Posts: 12
Joined: Thu Mar 06, 2025 5:21 pm

Re: 64 bit GDT triple faulting

Post by core2extreme »

Octocontrabass wrote: ↑Fri Jun 20, 2025 9:25 pm
core2extreme wrote: ↑Fri Jun 20, 2025 11:13 am

Code: Select all

check_exception old: 0xffffffff new 0xe
     0: v=0e e=0003
It's a page fault caused by writing to a page where writes are not allowed.
core2extreme wrote: ↑Fri Jun 20, 2025 11:13 am

Code: Select all

GDT=     ffffffff80009b8c 00000027
IDT=     0000000000000000 00000000
CR0=80010011 CR2=ffffffff80009ba0
The faulting address is 0x14 bytes past the start of your GDT.

So, yes, the CPU is trying to set the "accessed" bit in your data segment descriptor. You can fix it by setting the "accessed" bit before you tell the CPU to use the descriptor:

Code: Select all

db 0b10010011
If the bit is already set, the CPU won't try to write to the read-only page. Make sure you set this bit in your other segment descriptors too, otherwise they'll also cause page faults when you try to use them.
Didn't think of that. Well at least it works now, thanks!
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