94 lines
1.1 KiB
C
94 lines
1.1 KiB
C
#include "types.h"
|
|
#include "riscv.h"
|
|
#include "defs.h"
|
|
#include "date.h"
|
|
#include "param.h"
|
|
#include "memlayout.h"
|
|
#include "proc.h"
|
|
|
|
int
|
|
sys_exit(void)
|
|
{
|
|
exit();
|
|
return 0; // not reached
|
|
}
|
|
|
|
int
|
|
sys_getpid(void)
|
|
{
|
|
return myproc()->pid;
|
|
}
|
|
|
|
int
|
|
sys_fork(void)
|
|
{
|
|
return fork();
|
|
}
|
|
|
|
int
|
|
sys_wait(void)
|
|
{
|
|
return wait();
|
|
}
|
|
|
|
int
|
|
sys_sbrk(void)
|
|
{
|
|
int addr;
|
|
int n;
|
|
|
|
if(argint(0, &n) < 0)
|
|
return -1;
|
|
printf("sbrk(%d), sz was %d\n", n, (int)myproc()->sz);
|
|
addr = myproc()->sz;
|
|
if(growproc(n) < 0)
|
|
return -1;
|
|
return addr;
|
|
}
|
|
|
|
#if 0
|
|
int
|
|
sys_kill(void)
|
|
{
|
|
int pid;
|
|
|
|
if(argint(0, &pid) < 0)
|
|
return -1;
|
|
return kill(pid);
|
|
}
|
|
|
|
int
|
|
sys_sleep(void)
|
|
{
|
|
int n;
|
|
uint ticks0;
|
|
|
|
if(argint(0, &n) < 0)
|
|
return -1;
|
|
acquire(&tickslock);
|
|
ticks0 = ticks;
|
|
while(ticks - ticks0 < n){
|
|
if(myproc()->killed){
|
|
release(&tickslock);
|
|
return -1;
|
|
}
|
|
sleep(&ticks, &tickslock);
|
|
}
|
|
release(&tickslock);
|
|
return 0;
|
|
}
|
|
|
|
// return how many clock tick interrupts have occurred
|
|
// since start.
|
|
int
|
|
sys_uptime(void)
|
|
{
|
|
uint xticks;
|
|
|
|
acquire(&tickslock);
|
|
xticks = ticks;
|
|
release(&tickslock);
|
|
return xticks;
|
|
}
|
|
#endif
|