34 lines
651 B
NASM
34 lines
651 B
NASM
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[bits 32]
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; void __attribute__((cdecl)) i686_GDT_Load(GDTDescriptor* descriptor, uint16_t codeSegment, uint16_t dataSegment);
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global i686_GDT_Load
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i686_GDT_Load:
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; make new call frame
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push ebp ; save old call frame
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mov ebp, esp ; initialize new call frame
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; load gdt
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mov eax, [ebp + 8]
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lgdt [eax]
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; reload code segment
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mov eax, [ebp + 12]
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push eax
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push .reload_cs
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retf
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.reload_cs:
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; reload data segments
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mov ax, [ebp + 16]
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mov ds, ax
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mov es, ax
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mov fs, ax
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mov gs, ax,
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mov ss, ax
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; restore old call frame
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mov esp, ebp
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pop ebp
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ret
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