diff options
Diffstat (limited to 'src/kernel/mem/gdt.h')
| -rw-r--r-- | src/kernel/mem/gdt.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/kernel/mem/gdt.h b/src/kernel/mem/gdt.h index aac16bb..485002b 100644 --- a/src/kernel/mem/gdt.h +++ b/src/kernel/mem/gdt.h @@ -17,7 +17,38 @@ struct gdt_ptr { uint32_t base; } __attribute__((packed)); +struct tss_entry { + uint32_t prev_tss; // The previous TSS - if we used hardware task switching this would form a linked list. + uint32_t esp0; // The stack pointer to load when we change to kernel mode. + uint32_t ss0; // The stack segment to load when we change to kernel mode. + uint32_t esp1; // Unused... + uint32_t ss1; + uint32_t esp2; + uint32_t ss2; + uint32_t cr3; + uint32_t eip; + uint32_t eflags; + uint32_t eax; + uint32_t ecx; + uint32_t edx; + uint32_t ebx; + uint32_t esp; + uint32_t ebp; + uint32_t esi; + uint32_t edi; + uint32_t es; // The value to load into ES when we change to kernel mode. + uint32_t cs; // The value to load into CS when we change to kernel mode. + uint32_t ss; // The value to load into SS when we change to kernel mode. + uint32_t ds; // The value to load into DS when we change to kernel mode. + uint32_t fs; // The value to load into FS when we change to kernel mode. + uint32_t gs; // The value to load into GS when we change to kernel mode. + uint32_t ldt; // Unused... + uint16_t trap; + uint16_t iomap_base; +} __attribute__((packed)); + void gdt_init(); +void gdt_setKernelStack(uint32_t esp0); #endif |