StupidOS/kernel/sys/cpu.inc

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;; File: cpu.inc
;; Structure: tss
;;
;; > 31 23 15 7 0
;; > +----------|----------+----------|----------+
;; > 0x64 | I/O map base | 00000000 0000000T |
;; > +----------|----------+----------|----------+
;; > 0x60 | 00000000 00000000 | LDT |
;; > +----------|----------+----------|----------+
;; > 0x5c | 00000000 00000000 | GS |
;; > +----------|----------+----------|----------+
;; > 0x58 | 00000000 00000000 | FS |
;; > +----------|----------+----------|----------+
;; > 0x54 | 00000000 00000000 | DS |
;; > +----------|----------+----------|----------+
;; > 0x50 | 00000000 00000000 | SS |
;; > +----------|----------+----------|----------+
;; > 0x4C | 00000000 00000000 | CS |
;; > +----------|----------+----------|----------+
;; > 0x48 | 00000000 00000000 | ES |
;; > +----------|----------+----------|----------+
;; > 0x44 | EDI |
;; > +----------|----------+----------|----------+
;; > 0x40 | ESI |
;; > +----------|----------+----------|----------+
;; > 0x3C | EBP |
;; > +----------|----------+----------|----------+
;; > 0x38 | ESP |
;; > +----------|----------+----------|----------+
;; > 0x34 | EBX |
;; > +----------|----------+----------|----------+
;; > 0x30 | EDX |
;; > +----------|----------+----------|----------+
;; > 0x2C | ECX |
;; > +----------|----------+----------|----------+
;; > 0x28 | EAX |
;; > +----------|----------+----------|----------+
;; > 0x24 | EFLAGS |
;; > +----------|----------+----------|----------+
;; > 0x20 | EIP |
;; > +----------|----------+----------|----------+
;; > 0x1C | CR3 |
;; > +----------|----------+----------|----------+
;; > 0x18 | 00000000 00000000 | SS2 |
;; > +----------|----------+----------|----------+
;; > 0x14 | ESP2 |
;; > +----------|----------+----------|----------+
;; > 0x10 | 00000000 00000000 | SS1 |
;; > +----------|----------+----------|----------+
;; > 0x0C | ESP1 |
;; > +----------|----------+----------|----------+
;; > 0x08 | 00000000 00000000 | SS0 |
;; > +----------|----------+----------|----------+
;; > 0x04 | ESP0 |
;; > +----------|----------+----------|----------+
;; > 0x00 | 00000000 00000000 | old TSS selector |
;; > +----------|----------+----------|----------+
struc TSS {
.prev_tss dd ?
.esp0 dd ?
.ss0 dd ?
.esp1 dd ?
.ss1 dd ?
.esp2 dd ?
.ss2 dd ?
.cr3 dd ?
.eip dd ?
.eflags dd ?
.eax dd ?
.ecx dd ?
.edx dd ?
.ebx dd ?
.esp dd ?
.ebp dd ?
.esi dd ?
.edi dd ?
.es dd ?
.cs dd ?
.ss dd ?
.ds dd ?
.fs dd ?
.gs dd ?
.ldt dd ?
.trap dw ?
.iomap dw ?
}
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DEFN TSS
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struc GDTGate {
}
;; Structure: IDTGate
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;; .offset_low - TODO
;; .selector - TODO
;; .zero - TODO
;; .attributes - TODO
;; .offset_high - TODO
;;
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struc IDTGate {
.offset_low dw ?
.selector dw ?
.zero db 0
.attributes db ?
.offset_high dw ?
}
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;; About: Gates
;; - Task Gate
;; > 31 23 15 7 0
;; > +----------------|----------------+-----------------|-----------------+
;; > | (NOT USED) | P DPL 0 0 1 0 1 (NOT USED) |
;; > +----------------|----------------+-----------------|-----------------+
;; > | SELECTOR | (NOT USED) |
;; > +----------------|----------------+-----------------|-----------------+
;;
;; - Interrupt Gate
;; > 31 23 15 7 0
;; > +----------------|----------------+-----------------|-----------------+
;; > | OFFSET 31..16 | P DPL 0 1 1 1 0 0 0 0 0 0 0 0 0 |
;; > +----------------|----------------+-----------------|-----------------+
;; > | SELECTOR | OFFSET 15..0 |
;; > +--------------- |----------------+-----------------|-----------------+
;;
;; - Trap Gate
;; > 31 23 15 7 0
;; > +----------------|----------------+-----------------|-----------------+
;; > | OFFSET 31..16 | P DPL 0 1 1 1 1 0 0 0 0 0 0 0 0 |
;; > +----------------|----------------+-----------------|-----------------+
;; > | SELECTOR | OFFSET 15..0 |
;; > +--------------- |----------------+-----------------|-----------------+
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struc IntFrame {
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;; registers
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.edi dd ?
.esi dd ?
.ebp dd ?
.esp dd ?
.ebx dd ?
.edx dd ?
.ecx dd ?
.eax dd ?
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;;
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.gs dd ?
.fs dd ?
.es dd ?
.ds dd ?
.intno dd ?
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;; by x86 hardware
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.err dd ?
.eip dd ?
.cs dd ?
.eflags dd ?
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;; crossring
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.useresp dd ?
.ss dd ?
}
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virtual at 0
IntFrame IntFrame
sizeof.IntFrame:
end virtual