35 lines
855 B
C
35 lines
855 B
C
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#include <stdint.h>
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struct tss_entry_struct {
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uint32_t prev_tss; // The previous TSS - with hardware task switching these form a kind of backward linked list.
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uint32_t esp0; // The stack pointer to load when changing to kernel mode.
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uint32_t ss0; // The stack segment to load when changing to kernel mode.
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// Everything below here is unused.
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uint32_t esp1; // esp and ss 1 and 2 would be used when switching to rings 1 or 2.
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uint32_t ss1;
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uint32_t esp2;
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uint32_t ss2;
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uint32_t cr3;
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uint32_t eip;
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uint32_t eflags;
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uint32_t eax;
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uint32_t ecx;
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uint32_t edx;
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uint32_t ebx;
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uint32_t esp;
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uint32_t ebp;
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uint32_t esi;
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uint32_t edi;
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uint32_t es;
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uint32_t cs;
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uint32_t ss;
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uint32_t ds;
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uint32_t fs;
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uint32_t gs;
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uint32_t ldt;
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uint16_t trap;
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uint16_t iomap_base;
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} __attribute__((packed));
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extern struct tss_entry_struct tss;
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