1//
2// assembler macros to create x86 segments
3//
4
5#define SEG_NULLASM \
6 .word 0, 0; \
7 .byte 0, 0, 0, 0
8
9// The 0xC0 means the limit is in 4096-byte units
10// and (for executable segments) 32-bit mode.
11#define SEG_ASM(type,base,lim) \
12 .word (((lim) >> 12) & 0xffff), ((base) & 0xffff); \
13 .byte (((base) >> 16) & 0xff), (0x90 | (type)), \
14 (0xC0 | (((lim) >> 28) & 0xf)), (((base) >> 24) & 0xff)
15
16#define STA_X 0x8 // Executable segment
17#define STA_W 0x2 // Writeable (non-executable segments)
18#define STA_R 0x2 // Readable (executable segments)
19