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Updated GDT code

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This commit is contained in:
Alex
2022-11-05 07:36:57 +02:00
parent 8e579133cc
commit 14ccd20d9b
2 changed files with 100 additions and 51 deletions
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56
Architecture/amd64/cpu/GlobalDescriptorTable.cpp
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@ -12,29 +12,35 @@ namespace GlobalDescriptorTable
{.Length = 0x0,
.BaseLow = 0x0,
.BaseMiddle = 0x0,
.Access = 0b00000000,
.Flags = 0b00000000,
.Access = {.Raw = 0x0},
.Flags = {.Raw = 0x0},
.BaseHigh = 0x0},
// kernel code
{.Length = 0x0,
.BaseLow = 0x0,
.BaseMiddle = 0x0,
.Access = RING0 |
CODE_READABLE |
CODE_SEGMENT |
PRESENT,
.Flags = _64BITS,
.Access = {.A = 0,
.RW = 1,
.DC = 0,
.E = 1,
.S = 1,
.DPL = 0,
.P = 1},
.Flags = {.L = 1},
.BaseHigh = 0x0},
// kernel data
{.Length = 0x0,
.BaseLow = 0x0,
.BaseMiddle = 0x0,
.Access = RING0 |
DATA_WRITEABLE |
DATA_SEGMENT |
PRESENT,
.Access = {.A = 0,
.RW = 1,
.DC = 0,
.E = 0,
.S = 1,
.DPL = 0,
.P = 1},
.Flags = 0b00000000,
.BaseHigh = 0x0},
@ -42,21 +48,27 @@ namespace GlobalDescriptorTable
{.Length = 0x0,
.BaseLow = 0x0,
.BaseMiddle = 0x0,
.Access = CODE_READABLE |
CODE_SEGMENT |
RING3 |
PRESENT,
.Flags = _64BITS,
.Access = {.A = 0,
.RW = 1,
.DC = 0,
.E = 1,
.S = 1,
.DPL = 3,
.P = 1},
.Flags = {.L = 1},
.BaseHigh = 0x0},
// user data
{.Length = 0x0,
.BaseLow = 0x0,
.BaseMiddle = 0x0,
.Access = DATA_WRITEABLE |
DATA_SEGMENT |
RING3 |
PRESENT,
.Access = {.A = 0,
.RW = 1,
.DC = 0,
.E = 0,
.S = 1,
.DPL = 3,
.P = 1},
.Flags = 0b00000000,
.BaseHigh = 0x0},
@ -83,6 +95,10 @@ namespace GlobalDescriptorTable
__attribute__((no_stack_protector)) void Init(int Core)
{
debug("Kernel: Code Access: %ld; Data Access: %ld", GDTEntries.Code.Access.Raw, GDTEntries.Data.Access.Raw);
debug("Kernel: Code Flags: %ld; Data Flags: %ld", GDTEntries.Code.Flags.Raw, GDTEntries.Data.Flags.Raw);
debug("User: Code Access: %ld; Data Access: %ld", GDTEntries.UserCode.Access.Raw, GDTEntries.UserData.Access.Raw);
debug("User: Code Flags: %ld; Data Flags: %ld", GDTEntries.UserCode.Flags.Raw, GDTEntries.UserData.Flags.Raw);
CPU::x64::lgdt(&gdt);
asmv("movq %%rsp, %%rax\n"