57b0f4a8f1
Ahmmm. Also made 64 bit kernel independent(you can call that thing to enter 64 bit kernel as long as you are in protected mode (no setup required.))(not working but will soon work).
56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
#include "kdef.h"
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#include "mem.h"
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void HYPKERNEL32 hk_write_segment_descriptor(void * const gdt, uint32_t const base, uint32_t const limit, uint64_t const attr)
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{
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if (gdt == NULL)
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return;
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uint64_t const seg_desc = (((uint64_t)base & 0xFFFF) << 16) | ((((uint64_t)base >> 16) & 0xFF) << 32) | ((((uint64_t)base >> 24) & 0xFF) << 56) | ((uint64_t)limit & 0xFFFF) | ((((uint64_t)limit >> 16) & 0xF) << 48) | attr;
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((uint8_t*)gdt)[0] = (uint8_t)(seg_desc & 0xFF);
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((uint8_t*)gdt)[1] = (uint8_t)((seg_desc >> 8) & 0xFF);
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((uint8_t*)gdt)[2] = (uint8_t)((seg_desc >> 16) & 0xFF);
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((uint8_t*)gdt)[3] = (uint8_t)((seg_desc >> 24) & 0xFF);
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((uint8_t*)gdt)[4] = (uint8_t)((seg_desc >> 32) & 0xFF);
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((uint8_t*)gdt)[5] = (uint8_t)((seg_desc >> 40) & 0xFF);
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((uint8_t*)gdt)[6] = (uint8_t)((seg_desc >> 48) & 0xFF);
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((uint8_t*)gdt)[7] = (uint8_t)((seg_desc >> 56) & 0xFF);
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return;
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}
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void HYPKERNEL32 hk_mem_cpy(void* src, void* dst, uint32_t size)
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{
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if (src == NULL || dst == NULL)
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return;
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char* cSrc = (char*)src;
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char* cDst = (char*)dst;
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while (size--)
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*(cDst++) = *(cSrc++);
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return;
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}
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void HYPKERNEL32 hk_mem_set(void* src, int8_t const val,uint32_t size)
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{
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if (src == NULL)
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return;
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int8_t * cSrc = (int8_t *)src;
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while (size--)
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*(cSrc++) = val;
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return;
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}
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void HYPKERNEL32 hk_mem_move(void* src, void* dst, uint32_t size)
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{
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if (src == NULL || dst == NULL)
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return;
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char* cSrc = (char*)src;
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char* cDst = (char*)dst;
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if (cSrc >= cDst)
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{
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return hk_mem_cpy(src,dst,size);
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}
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cSrc += size;
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cDst += size;
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while (size--)
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*(--cDst) = *(--cSrc);
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return;
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} |