0e2a7a9730
Reduced kernel size by 512KB by moving private buffer into cstart() function. Replaced assertions with erroneous return values. Removed assertions relating to isuserp(rp), since all processes should become user processes; system processes are now treated similar to other processes.
30 lines
1.1 KiB
C
30 lines
1.1 KiB
C
/* Masks and flags for system calls. */
|
|
#define SYSCALL_FUNC 0x0F /* mask for system call function */
|
|
#define SYSCALL_FLAGS 0xF0 /* mask for system call flags */
|
|
#define NON_BLOCKING 0x10 /* prevent blocking, return error */
|
|
#define FRESH_ANSWER 0x20 /* ignore pending notifications as answer */
|
|
/* (default behaviour for SENDREC calls) */
|
|
|
|
/* System calls (numbers passed when trapping to the kernel). */
|
|
#define ECHO 0 /* function code for echoing messages */
|
|
#define SEND 1 /* function code for sending messages */
|
|
#define RECEIVE 2 /* function code for receiving messages */
|
|
#define SENDREC 3 /* function code for SEND + RECEIVE */
|
|
#define NOTIFY 4 /* function code for notifications */
|
|
|
|
#if 0
|
|
/* Bit map operations to manipulate bits of a simple mask variable. */
|
|
#define set_bit(mask, n) ((mask) |= (1 << (n)))
|
|
#define clear_bit(mask, n) ((mask) &= ~(1 << (n)))
|
|
#define isset_bit(mask, n) ((mask) & (1 << (n)))
|
|
#define empty_mask (0)
|
|
#define filled_mask (~0)
|
|
#endif
|
|
|
|
/* Call masks indicating which system calls a process can make. */
|
|
#define EMPTY_CALL_MASK (0)
|
|
#define USER_CALL_MASK (1 << SENDREC)
|
|
#define SYSTEM_CALL_MASK (~0)
|
|
|
|
|