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Add MBR structures

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This commit is contained in:
Alex Kotov 2022-01-16 19:34:20 +05:00
parent 11613430f9
commit 55782bdef9
Signed by: kotovalexarian
GPG key ID: 553C0EBBEB5D5F08
1 changed files with 29 additions and 0 deletions
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src/main.c
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@ -16,8 +16,37 @@
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdint.h>
#include <stdio.h>
#define MBR_SIZE 512
#define MBR_ENTRIES 4
#define MBR_MAGIC 0xAA55
struct MbrEntry {
uint8_t drive_attributes;
unsigned start_chs_address : 24;
uint8_t partition_type;
unsigned last_chs_address : 24;
uint32_t start_lba;
uint32_t sectors_count;
}
__attribute__((packed));
struct MbrInfo {
uint32_t disk_id;
uint16_t reserved;
struct MbrEntry entries[MBR_ENTRIES];
uint16_t magic;
}
__attribute__((packed));
struct Mbr {
uint8_t bootstrap[MBR_SIZE - sizeof(struct MbrInfo)];
struct MbrInfo info;
}
__attribute__((packed));
int main()
{
printf("Hello, World!\n");