15 lines
591 B
C
15 lines
591 B
C
|
#define SEG_NULL \
|
||
|
|
.word 0, 0; \
|
||
|
|
.byte 0, 0, 0, 0
|
||
|
|
#define SEG(type,base,lim) \
|
||
|
|
.word (((lim) >> 12) & 0xffff), ((base) & 0xffff); \
|
||
|
|
.byte (((base) >> 16) & 0xff), (0x90 | (type)), \
|
||
|
|
(0xC0 | (((lim) >> 28) & 0xf)), (((base) >> 24) & 0xff)
|
||
|
|
|
||
|
|
#define STA_X 0x8 // Executable segment
|
||
|
|
#define STA_E 0x4 // Expand down (non-executable segments)
|
||
|
|
#define STA_C 0x4 // Conforming code segment (executable only)
|
||
|
|
#define STA_W 0x2 // Writeable (non-executable segments)
|
||
|
|
#define STA_R 0x2 // Readable (executable segments)
|
||
|
|
#define STA_A 0x1 // Accessed
|