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/* The kernel call implemented in this file:
* m_type: SYS_UMAP
*
* The parameters for this kernel call are:
* m_lsys_krn_sys_umap.src_endpt (process number)
* m_lsys_krn_sys_umap.segment (segment where address is: T, D, or S)
* m_lsys_krn_sys_umap.src_addr (virtual address)
* m_krn_lsys_sys_umap.dst_addr (returns physical address)
* m_lsys_krn_sys_umap.nr_bytes (size of datastructure)
*/
#include "kernel/system.h"
#include <minix/endpoint.h>
#if USE_UMAP
#if ! USE_UMAP_REMOTE
#undef do_umap_remote
#endif
/*==========================================================================*
* do_umap *
*==========================================================================*/
int do_umap(struct proc * caller, message * m_ptr)
{
int seg_index = m_ptr->m_lsys_krn_sys_umap.segment & SEGMENT_INDEX;
int endpt = m_ptr->m_lsys_krn_sys_umap.src_endpt;
/* This call is a subset of umap_remote, it allows mapping virtual addresses
* in the caller's address space and grants where the caller is specified as
* grantee; after the security check we simply invoke do_umap_remote
*/
if (seg_index != MEM_GRANT && endpt != SELF) return EPERM;
m_ptr->m_lsys_krn_sys_umap.dst_endpt = SELF;
return do_umap_remote(caller, m_ptr);
}
#endif /* USE_UMAP */
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