39 lines
691 B
C
39 lines
691 B
C
#include "tss.h"
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#include "gdt.h"
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#include "string.h"
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typedef struct Tss {
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uint32 reserved0;
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uint64 rsp0;
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uint64 rsp1;
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uint64 rsp2;
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uint64 reserved1;
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uint64 ist1;
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uint64 ist2;
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uint64 ist3;
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uint64 ist4;
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uint64 ist5;
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uint64 ist6;
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uint64 ist7;
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uint64 reserved2;
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uint16 reserved3;
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uint16 iomapBase;
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} __attribute__((packed)) Tss;
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static Tss tss;
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void tssInit(uint64 rsp0)
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{
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memset(&tss, 0, sizeof(tss));
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tss.rsp0 = rsp0;
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tss.iomapBase = sizeof(Tss);
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gdtInstallTss((uint64)&tss, sizeof(Tss) - 1);
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__asm__ volatile("ltr %w0" : : "r"((uint16)tssSelector));
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}
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void tssSetRsp0(uint64 rsp0)
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{
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tss.rsp0 = rsp0;
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}
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