Getting to Ring 3: Difference between revisions

unsigned int limit_low : 16;

unsigned int base_low : 24;

unsigned int accessed : 1;

unsigned int read_write : 1; // readable for code, writable for data

unsigned int conforming_expand_down : 1; // conforming for code, expand down for data

unsigned int code : 1; // 1 for code, 0 for data

unsigned int code_data_segment : 1; // should be 1 for everything but TSS and LDT

unsigned int DPL : 2; // privilege level

unsigned int present : 1;

unsigned int limit_high : 4;

unsigned int available : 1; // only used in software; has no effect on hardware

unsigned int long_mode : 1;

unsigned int big : 1; // 32-bit opcodes for code, uint32_t stack for data

unsigned int gran : 1; // 1 to use 4k page addressing, 0 for byte addressing

unsigned int base_high : 8;