minix/lib/libsys/sys_vumap.c

   1 #include "syslib.h"
   2
   3 /*===========================================================================*
   4  *                              sys_vumap                                    *
   5  *===========================================================================*/
   6 int sys_vumap(
   7   endpoint_t endpt,                     /* source process endpoint, or SELF */
   8   struct vumap_vir *vvec,               /* virtual (input) vector */
   9   int vcount,                           /* number of elements in vvec */
  10   size_t offset,                        /* offset into first vvec element */
  11   int access,                           /* requested safecopy access flags */
  12   struct vumap_phys *pvec,              /* physical (output) vector */
  13   int *pcount                           /* (max, returned) nr of els in pvec */
  14 )
  15 {
  16   message m;
  17   int r;
  18
  19   m.m_lsys_krn_sys_vumap.endpt = endpt;
  20   m.m_lsys_krn_sys_vumap.vaddr = (vir_bytes) vvec;
  21   m.m_lsys_krn_sys_vumap.vcount = vcount;
  22   m.m_lsys_krn_sys_vumap.offset = offset;
  23   m.m_lsys_krn_sys_vumap.access = access;
  24   m.m_lsys_krn_sys_vumap.paddr = (vir_bytes) pvec;
  25   m.m_lsys_krn_sys_vumap.pmax = *pcount;
  26
  27   r = _kernel_call(SYS_VUMAP, &m);
  28
  29   if (r != OK)
  30         return r;
  31
  32   *pcount = m.m_krn_lsys_sys_vumap.pcount;
  33   return OK;
  34 }