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HyperAssembler 2014-10-12 11:56:12 -04:00
parent cc60122630
commit e12cac16a3
3 changed files with 59 additions and 10 deletions
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20
x86/src/entry.c
View File

@ -1,8 +1,28 @@
#include "type32.h"
#include "grub.h"
#include "mem32.h"
#include "kdef32.h"
uint64 g_gdt[32];
gdt_ptr g_gdt_ptr;
uint32 HKA32 hk_main(multiboot_info_t* multibootInfo)
{
int32 gdtIdx = 0;
//empty segment
hk_set_segment_descriptor(&g_gdt[gdtIdx++], 0x0, 0x0, 0x0, 0x0);
//ring 0 code segment
hk_set_segment_descriptor(&g_gdt[gdtIdx++], 0x0, 0xFFFFF, 0x9A, 0xC);
//ring 3 code segment
hk_set_segment_descriptor(&g_gdt[gdtIdx++], 0x0, 0xFFFFF, 0xFA, 0xC);
//ring 0 data
hk_set_segment_descriptor(&g_gdt[gdtIdx++], 0x0, 0xFFFFF, 0x92, 0xC);
//ring 3 data
hk_set_segment_descriptor(&g_gdt[gdtIdx++], 0x0, 0xFFFFF, 0xF2, 0xC);
g_gdt_ptr.limit = 32*8-1;
g_gdt_ptr.base = g_gdt;
//setup new gdt
//setup paging
//setup interrupt

44
x86/src/mem32.c
View File

@ -1,15 +1,43 @@
#include "mem32.h"
#include "type32.h"
#include "kdef32.h"
int32 hk_set_gdt_descriptor(gdt_descriptor* pgdt_descriptor, uint32 base, uint32 limit, uint8 access, uint8 gran)
int32 hk_set_segment_descriptor(segment_descriptor* pseg_descriptor, uint32 base, uint32 limit, uint8 access, uint8 flags)
{
pgdt_descriptor->base_low = (base & 0xFFFF);
pgdt_descriptor->base_middle = (base >> 16) & 0xFF;
pgdt_descriptor->base_high = (base >> 24) & 0xFF;
if (pseg_descriptor == NULL)
return -1;
pseg_descriptor->base_low = (base & 0xFFFF);
pseg_descriptor->base_middle = (base >> 16) & 0xFF;
pseg_descriptor->base_high = (base >> 24) & 0xFF;
pseg_descriptor->limit_low = (limit & 0xFFFF);
pseg_descriptor->access = access & 0xFF;
pseg_descriptor->limit_mid_flags = ((flags & 0x0F) << 4) + ((limit >> 16) & 0x0F);
return 0;
}
pgdt_descriptor->limit_low = (limit & 0xFFFF);
pgdt_descriptor->access = ((limit >> 16) & 0x0F);
int32 hk_set_page_table_entry_32(uint32* dest,uint32 base,uint32 flags)
{
if (dest == NULL)
return -1;
*dest = (base & 0xFFFFF000) + (flags & 0x0FFF);
return 0;
}
pgdt_descriptor->granularity |= (gran & 0xF0);
pgdt_descriptor->access = access;
int32 hk_set_page_directory_entry_32(uint32* dest, uint32 base, uint32 flags)
{
if (dest == NULL)
return -1;
*dest = (base & 0xFFFFF000) + (flags & 0x0FFF);
return 0;
}
int32 hk_map_physcial_address_32(uint32* page_directory_base, uint32 physical_addr, uint32 virtual_addr, uint32 flags)
{
if (page_directory_base == NULL)
return -1;
uint32 pde_idx = virtual_addr >> 22;
uint32 pde = *(page_directory_base + pde_idx * 4);
uint32 page_table_base = ;
uint32 pte_idx = ;
}

5
x86/src/mem32.h
View File

@ -11,9 +11,9 @@ typedef struct
uint16 base_low;
uint8 base_middle;
uint8 access;
uint8 limit_mid_flag;
uint8 limit_mid_flags;
uint8 base_high;
} gdt_descriptor;
} segment_descriptor;
typedef struct
{
@ -34,5 +34,6 @@ typedef struct
#pragma pop()
int32 hk_set_segment_descriptor(segment_descriptor* pseg_descriptor, uint32 base, uint32 limit, uint8 access, uint8 flags);
#endif