28 lines
886 B
C
28 lines
886 B
C
/* noff.h
|
|
* Data structures defining the Nachos Object Code Format
|
|
*
|
|
* Basically, we only know about three types of segments:
|
|
* code (read-only), initialized data, and unitialized data
|
|
*/
|
|
|
|
#define NOFFMAGIC 0xbadfad /* magic number denoting Nachos
|
|
/* object code file*/
|
|
|
|
typedef struct segment {
|
|
int virtualAddr; /* location of segment in virt addr space */
|
|
int inFileAddr; /* location of segment in this file */
|
|
int size; /* size of segment */
|
|
} Segment;
|
|
|
|
typedef struct noffHeader {
|
|
int noffMagic; /* should be NOFFMAGIC */
|
|
Segment code; /* executable code segment */
|
|
Segment initData; /* initialized data segment */
|
|
#ifdef RDATA
|
|
Segment readonlyData; /* read only data */
|
|
#endif
|
|
Segment uninitData; /* uninitialized data segment --
|
|
* should be zero'ed before use
|
|
*/
|
|
} NoffHeader;
|