Basic VM and other minor improvements.

Not complete, probably not fully debugged or optimized.

lib/syslib/sys_vmctl.c

@@ -0,0 +1,61 @@
+#include "syslib.h"
+
+PUBLIC int sys_vmctl(endpoint_t who, int param, u32_t value)
+{
+  message m;
+  int r;
+
+  m.SVMCTL_WHO = who;
+  m.SVMCTL_PARAM = param;
+  m.SVMCTL_VALUE = value;
+  r = _taskcall(SYSTASK, SYS_VMCTL, &m);
+  return(r);
+}
+
+PUBLIC int sys_vmctl_get_pagefault_i386(endpoint_t *who, u32_t *cr2, u32_t *err)
+{
+  message m;
+  int r;
+
+  m.SVMCTL_WHO = SELF;
+  m.SVMCTL_PARAM = VMCTL_GET_PAGEFAULT;
+  r = _taskcall(SYSTASK, SYS_VMCTL, &m);
+  if(r == OK) {
+	*who = m.SVMCTL_PF_WHO;
+	*cr2 = m.SVMCTL_PF_I386_CR2;
+	*err = m.SVMCTL_PF_I386_ERR;
+  }
+  return(r);
+}
+
+PUBLIC int sys_vmctl_get_cr3_i386(endpoint_t who, u32_t *cr3)
+{
+  message m;
+  int r;
+
+  m.SVMCTL_WHO = who;
+  m.SVMCTL_PARAM = VMCTL_I386_GETCR3;
+  r = _taskcall(SYSTASK, SYS_VMCTL, &m);
+  if(r == OK) {
+	*cr3 = m.SVMCTL_VALUE;
+  }
+  return(r);
+}
+
+PUBLIC int sys_vmctl_get_memreq(endpoint_t *who, vir_bytes *mem,
+	vir_bytes *len, int *wrflag)
+{
+  message m;
+  int r;
+
+  m.SVMCTL_WHO = SELF;
+  m.SVMCTL_PARAM = VMCTL_MEMREQ_GET;
+  r = _taskcall(SYSTASK, SYS_VMCTL, &m);
+  if(r == OK) {
+	*who = m.SVMCTL_MRG_EP;
+	*mem = (vir_bytes) m.SVMCTL_MRG_ADDR;
+	*len = m.SVMCTL_MRG_LEN;
+	*wrflag = m.SVMCTL_MRG_WRITE;
+  }
+  return r;
+}