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