53 lines
1.6 KiB
C
53 lines
1.6 KiB
C
/* The kernel call implemented in this file:
|
|
* m_type: SYS_NEWMAP
|
|
*
|
|
* The parameters for this kernel call are:
|
|
* m1_i1: PR_ENDPT (install new map for this process)
|
|
* m1_p1: PR_MEM_PTR (pointer to the new memory map)
|
|
*/
|
|
#include "../system.h"
|
|
#include <minix/endpoint.h>
|
|
|
|
#if USE_NEWMAP
|
|
|
|
/*===========================================================================*
|
|
* do_newmap *
|
|
*===========================================================================*/
|
|
PUBLIC int do_newmap(m_ptr)
|
|
message *m_ptr; /* pointer to request message */
|
|
{
|
|
/* Handle sys_newmap(). Fetch the memory map. */
|
|
register struct proc *rp; /* process whose map is to be loaded */
|
|
struct mem_map *map_ptr; /* virtual address of map inside caller */
|
|
int proc_nr;
|
|
|
|
map_ptr = (struct mem_map *) m_ptr->PR_MEM_PTR;
|
|
if (! isokendpt(m_ptr->PR_ENDPT, &proc_nr)) return(EINVAL);
|
|
if (iskerneln(proc_nr)) return(EPERM);
|
|
rp = proc_addr(proc_nr);
|
|
|
|
return newmap(rp, map_ptr);
|
|
}
|
|
|
|
|
|
/*===========================================================================*
|
|
* newmap *
|
|
*===========================================================================*/
|
|
PUBLIC int newmap(rp, map_ptr)
|
|
struct proc *rp; /* process whose map is to be loaded */
|
|
struct mem_map *map_ptr; /* virtual address of map inside caller */
|
|
{
|
|
int r;
|
|
/* Fetch the memory map. */
|
|
if((r=data_copy(who_e, (vir_bytes) map_ptr,
|
|
SYSTEM, (vir_bytes) rp->p_memmap, sizeof(rp->p_memmap))) != OK) {
|
|
kprintf("newmap: data_copy failed! (%d)\n", r);
|
|
return r;
|
|
}
|
|
|
|
alloc_segments(rp);
|
|
|
|
return(OK);
|
|
}
|
|
#endif /* USE_NEWMAP */
|
|
|