1 files changed, 72 insertions, 0 deletions
diff --git a/sysproc.c b/sysproc.c
new file mode 100644
index 0000000..f648c0e
--- /dev/null
+++ b/sysproc.c
@@ -0,0 +1,72 @@
+#include "types.h"
+#include "stat.h"
+#include "param.h"
+#include "mmu.h"
+#include "proc.h"
+#include "defs.h"
+#include "x86.h"
+#include "traps.h"
+#include "syscall.h"
+#include "spinlock.h"
+#include "buf.h"
+#include "fs.h"
+#include "fsvar.h"
+#include "elf.h"
+#include "fd.h"
+#include "fcntl.h"
+
+int
+sys_fork(void)
+{
+  struct proc *np;
+
+  if((np = copyproc(curproc[cpu()])) == 0)
+    return -1;
+  np->state = RUNNABLE;
+  return np->pid;
+}
+
+int
+sys_exit(void)
+{
+  proc_exit();
+  return 0;  // not reached
+}
+
+int
+sys_wait(void)
+{
+  return proc_wait();
+}
+
+int
+sys_kill(void)
+{
+  int pid;
+
+  if(fetcharg(0, &pid) < 0)
+    return -1;
+  return proc_kill(pid);
+}
+
+int
+sys_getpid(void)
+{
+  struct proc *cp = curproc[cpu()];
+  return cp->pid;
+}
+
+int
+sys_sbrk(void)
+{
+  uint addr;
+  int n;
+  struct proc *cp = curproc[cpu()];
+
+  if(fetcharg(0, &n) < 0)
+    return -1;
+  if((addr = growproc(n)) == 0xffffffff)
+    return -1;
+  setupsegs(cp);
+  return addr;
+}