34 lines
1.1 KiB
C
34 lines
1.1 KiB
C
/* The system call implemented in this file:
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* m_type: SYS_UMAP
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*
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* The parameters for this system call are:
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* m5_i1: CP_SRC_PROC_NR (process number)
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* m5_c1: CP_SRC_SPACE (segment where address is: T, D, or S)
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* m5_l1: CP_SRC_ADDR (virtual address)
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* m5_l2: CP_DST_ADDR (returns physical address)
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* m5_l3: CP_NR_BYTES (size of datastructure)
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*/
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#include "../kernel.h"
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#include "../system.h"
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/*==========================================================================*
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* do_umap *
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*==========================================================================*/
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PUBLIC int do_umap(m_ptr)
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register message *m_ptr; /* pointer to request message */
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{
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/* Same as umap_local(), for non-kernel processes. */
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int proc_nr = (int) m_ptr->CP_SRC_PROC_NR;
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if (proc_nr == SELF) proc_nr = m_ptr->m_source;
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if (! isokprocn(proc_nr)) return(EINVAL);
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m_ptr->CP_DST_ADDR = umap_local(proc_addr(proc_nr),
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(int) m_ptr->CP_SRC_SPACE,
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(vir_bytes) m_ptr->CP_SRC_ADDR,
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(vir_bytes) m_ptr->CP_NR_BYTES);
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return(OK);
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}
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