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Another improvements to GDT
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This commit is contained in:
Rafal Kupiec 2023-02-03 18:00:37 +01:00
parent a49d0804ce
commit 269214ed34
Signed by: belliash
GPG Key ID: 4E829243E0CFE6B4
4 changed files with 14 additions and 10 deletions
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1
sdk/xtdk/amd64/ketypes.h
View File

@ -29,6 +29,7 @@
#define KGDT_SYS_TSS 0x0040
#define KGDT_R3_CMTEB 0x0050
#define KGDT_R0_LDT 0x0060
#define KGDT_ALIAS 0x0070
/* GDT descriptor privilege levels */
#define KGDT_DPL_SYSTEM 0

1
sdk/xtdk/i686/ketypes.h
View File

@ -33,6 +33,7 @@
#define KGDT_DF_TSS 0x0050
#define KGDT_NMI_TSS 0x0058
#define KGDT_VDBS 0x0068
#define KGDT_ALIAS 0x0070
/* GDT descriptor privilege levels */
#define KGDT_DPL_SYSTEM 0

9
xtoskrnl/ar/amd64/procsup.c
View File

@ -80,16 +80,17 @@ ArpInitializeGdt(IN PKPROCESSOR_BLOCK ProcessorBlock)
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_NULL, 0x0, 0x0, KGDT_TYPE_NONE, KGDT_DPL_SYSTEM, 1);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R0_CODE, 0x0, 0x0, KGDT_TYPE_CODE, KGDT_DPL_SYSTEM, 1);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R0_DATA, 0x0, 0x0, KGDT_TYPE_DATA, KGDT_DPL_SYSTEM, 1);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R3_CODE, 0x0, 0x0, KGDT_TYPE_CODE, KGDT_DPL_USER, 1);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R3_DATA, 0x0, 0xFFFFFFFF, KGDT_TYPE_DATA, KGDT_DPL_USER, 2);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R3_CMCODE, 0x0, 0xFFFFFFFF, KGDT_TYPE_CODE, KGDT_DPL_USER, 2);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R3_DATA, 0x0, 0xFFFFFFFF, KGDT_TYPE_DATA, KGDT_DPL_USER, 2);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R3_CODE, 0x0, 0x0, KGDT_TYPE_CODE, KGDT_DPL_USER, 1);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_SYS_TSS, (ULONG_PTR)ProcessorBlock->TssBase, sizeof(KTSS), AMD64_TSS, KGDT_DPL_SYSTEM, 0);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R3_CMTEB, 0x0, 0x0FFF, KGDT_TYPE_DATA, KGDT_DPL_USER, 2);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R0_LDT, 0x0, 0xFFFFFFFF, KGDT_TYPE_CODE, KGDT_DPL_SYSTEM, 0);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_SYS_TSS, (ULONGLONG)ProcessorBlock->TssBase, sizeof(KTSS), AMD64_TSS, KGDT_DPL_SYSTEM, 0);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_ALIAS, (ULONG_PTR)ProcessorBlock->GdtBase, (GDT_ENTRIES * sizeof(KGDTENTRY)) - 1, KGDT_TYPE_DATA, KGDT_DPL_SYSTEM, 0);
}
/**
* Initializes the kernel's Interrupt Descriptor Table (GDT).
* Initializes the kernel's Interrupt Descriptor Table (IDT).
*
* @param ProcessorBlock
* Supplies a pointer to the processor block to use.

13
xtoskrnl/ar/i686/procsup.c
View File

@ -80,18 +80,19 @@ ArpInitializeGdt(IN PKPROCESSOR_BLOCK ProcessorBlock)
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R0_DATA, 0x0, 0xFFFFFFFF, KGDT_TYPE_DATA, KGDT_DPL_SYSTEM, 2);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R3_CODE, 0x0, 0xFFFFFFFF, KGDT_TYPE_CODE, KGDT_DPL_USER, 2);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R3_DATA, 0x0, 0xFFFFFFFF, KGDT_TYPE_DATA, KGDT_DPL_USER, 2);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R3_TEB, 0x0, 0xFFF, KGDT_TYPE_DATA | KGDT_DESCRIPTOR_ACCESSED, KGDT_DPL_USER, 2);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R0_LDT, 0x0, 0x0, KGDT_TYPE_NONE, KGDT_DPL_SYSTEM, 0);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_VDM_TILE, 0x0400, 0xFFFF, KGDT_TYPE_DATA, KGDT_DPL_USER, 0);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R0_PRCB, (ULONG_PTR)ProcessorBlock, sizeof(KPROCESSOR_BLOCK), KGDT_TYPE_DATA, KGDT_DPL_SYSTEM, 2);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_SYS_TSS, (ULONG_PTR)ProcessorBlock->TssBase, sizeof(KTSS) - 1, I686_TSS, KGDT_DPL_SYSTEM, 0);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R0_PRCB, (ULONG_PTR)ProcessorBlock, sizeof(KPROCESSOR_BLOCK), KGDT_TYPE_DATA, KGDT_DPL_SYSTEM, 2);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R3_TEB, 0x0, 0xFFF, KGDT_TYPE_DATA | KGDT_DESCRIPTOR_ACCESSED, KGDT_DPL_USER, 2);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_VDM_TILE, 0x0400, 0xFFFF, KGDT_TYPE_DATA, KGDT_DPL_USER, 0);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_R0_LDT, 0x0, 0x0, KGDT_TYPE_NONE, KGDT_DPL_SYSTEM, 0);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_DF_TSS, 0x20000, 0xFFFF, I686_TSS, KGDT_DPL_SYSTEM, 0);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_NMI_TSS, 0x20000, 0xFFFF, KGDT_TYPE_CODE, KGDT_DPL_SYSTEM, 0);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_VDBS, 0xB8000, 0x3FFF, KGDT_TYPE_DATA, KGDT_DPL_SYSTEM, 0);
ArpSetGdtEntry(ProcessorBlock->GdtBase, KGDT_ALIAS, (ULONG_PTR)ProcessorBlock->GdtBase, (GDT_ENTRIES * sizeof(KGDTENTRY)) - 1, KGDT_TYPE_DATA, KGDT_DPL_SYSTEM, 0);
}
/**
* Initializes the kernel's Interrupt Descriptor Table (GDT).
* Initializes the kernel's Interrupt Descriptor Table (IDT).
*
* @param ProcessorBlock
* Supplies a pointer to the processor block to use.
@ -225,7 +226,7 @@ ArpInitializeTss(IN PKPROCESSOR_BLOCK ProcessorBlock)
ProcessorBlock->TssBase->LDT = KGDT_R0_LDT;
ProcessorBlock->TssBase->Ss0 = KGDT_R0_DATA;
/* Initialize task gates for DoubleFault trap */
/* Initialize task gates for DoubleFault and NMI traps */
ArpSetDoubleFaultTssEntry(ProcessorBlock);
ArpSetNonMaskableInterruptTssEntry(ProcessorBlock);
}