marco/vulcanos
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Fixed GDT bug

Browse Source
This commit is contained in:
ice-bit 2019-07-05 11:33:55 +02:00
parent ccd31d8fab
commit 14ee39a515
1 changed files with 5 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
kernel/drivers/gdt.h
View File

@ -37,7 +37,7 @@
#define GDT_BASE 0x00000000 #define GDT_BASE 0x00000000
#define GDT_LIMIT 0xFFFFFFFF #define GDT_LIMIT 0xFFFFFFFF
// GDT granularity // GDT granularity
#define GDT_SEGMENT_LENGTH 0xf #define GDT_SEGMENT_LENGTH 0xF
#define GDT_OPERAND_SIZE_16 0 #define GDT_OPERAND_SIZE_16 0
#define GDT_OPERAND_SIZE_32 1 #define GDT_OPERAND_SIZE_32 1
#define GDT_GRANULARITY_1K 0 #define GDT_GRANULARITY_1K 0
@ -49,6 +49,8 @@
#define GDT_DATA_TYPE_READ_WRITE_ACCESSED 0x3 #define GDT_DATA_TYPE_READ_WRITE_ACCESSED 0x3
#define GDT_DATA_TYPE_READ_ONLY_EXPAND_DOWN 0x4 #define GDT_DATA_TYPE_READ_ONLY_EXPAND_DOWN 0x4
#define GDT_DATA_TYPE_READ_ONLY_EXPAND_DOWN_ACCESSED 0x5 #define GDT_DATA_TYPE_READ_ONLY_EXPAND_DOWN_ACCESSED 0x5
#define GDT_DATA_TYPE_READ_WRITE_EXPAND_DATA 0x6
#define GDT_DATA_TYPE_READ_WRITE_EXPAND_DATA_ACCESSED 0x7
#define GDT_DATA_TYPE_EXEC_ONLY 0x8 #define GDT_DATA_TYPE_EXEC_ONLY 0x8
#define GDT_CODE_TYPE_EXEC_ONLY_ACCESSED 0x9 #define GDT_CODE_TYPE_EXEC_ONLY_ACCESSED 0x9
#define GDT_CODE_TYPE_EXEC_READ 0xA #define GDT_CODE_TYPE_EXEC_READ 0xA
@ -117,9 +119,9 @@ struct gdt_entry_struct {
uint16_t limit_low; uint16_t limit_low;
uint16_t base_low; uint16_t base_low;
uint8_t base_middle; uint8_t base_middle;
uint8_t base_high;
gdt_access_t access; gdt_access_t access;
gdt_gran_t granularity; gdt_gran_t granularity;
uint8_t base_high;
}__attribute__((packed)); }__attribute__((packed));
typedef struct gdt_entry_struct gdt_entry_t; typedef struct gdt_entry_struct gdt_entry_t;
@ -127,7 +129,7 @@ typedef struct gdt_entry_struct gdt_entry_t;
* This is needed to locate it later */ * This is needed to locate it later */
struct gdt_ptr { struct gdt_ptr {
uint16_t limit; uint16_t limit;
uint16_t base; uint32_t base;
}__attribute__((packed)); }__attribute__((packed));
typedef struct gdt_ptr gdt_ptr_t; typedef struct gdt_ptr gdt_ptr_t;