Move to new processctl syscall, share common kernel and ulib headers

kernel/syscall/processctl.c

@@ -0,0 +1,53 @@
+#include <stdint.h>
+#include "syscall.h"
+#include "proc/proc.h"
+#include "spinlock/spinlock.h"
+#include "hdrs/errors.h"
+#include "util/util.h"
+
+#define PID_SELF_MAGIC 0x5E1F
+
+enum {
+  PCTL_KILL = 0,
+};
+
+typedef struct {
+  
+} ProcessCtl;
+
+int32_t SYSCALL3(sys_processctl, pid1, cmd1, optsptr1) {
+  uint64_t pid = pid1;
+  uint64_t cmd = cmd1;
+  ProcessCtl *pctl = (ProcessCtl *)(void *)optsptr1;
+  int32_t ret = E_OK;
+
+  spinlock_acquire(&PROCS.spinlock);
+
+  if (pid == PID_SELF_MAGIC) {
+    pid = PROCS.current->pid;
+  }
+
+  Proc *proc = NULL;
+  LL_FINDPROP(PROCS.procs, proc, pid, pid);
+
+  if (proc == NULL) {
+    ret = E_INVALIDARGUMENT;
+    goto done;
+  }
+
+  switch (cmd) {
+    case PCTL_KILL: {
+      proc_kill(proc);
+      ret = E_DOSCHEDULING;
+      goto done;
+    } break;
+    default: {
+      ret = E_INVALIDARGUMENT;
+      goto done;
+    } break;
+  }
+
+done:
+  spinlock_release(&PROCS.spinlock);
+  return ret;
+}