minix/lib/libsys/sys_vircopy.c

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#include "syslib.h"
PUBLIC int sys_vircopy(src_proc, src_seg, src_vir,
dst_proc, dst_seg, dst_vir, bytes)
endpoint_t src_proc; /* source process */
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int src_seg; /* source memory segment */
vir_bytes src_vir; /* source virtual address */
endpoint_t dst_proc; /* destination process */
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int dst_seg; /* destination memory segment */
vir_bytes dst_vir; /* destination virtual address */
phys_bytes bytes; /* how many bytes */
{
/* Transfer a block of data. The source and destination can each either be a
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* process number or SELF (to indicate own process number). Virtual addresses
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* are offsets within LOCAL_SEG (text, stack, data), or BIOS_SEG.
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*/
message copy_mess;
if (bytes == 0L) return(OK);
copy_mess.CP_SRC_ENDPT = src_proc;
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copy_mess.CP_SRC_SPACE = src_seg;
copy_mess.CP_SRC_ADDR = (long) src_vir;
copy_mess.CP_DST_ENDPT = dst_proc;
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copy_mess.CP_DST_SPACE = dst_seg;
copy_mess.CP_DST_ADDR = (long) dst_vir;
copy_mess.CP_NR_BYTES = (long) bytes;
return(_kernel_call(SYS_VIRCOPY, &copy_mess));
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}