56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
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/* The system call implemented in this file:
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* m_type: SYS_VCOPY
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*
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* The parameters for this system call are:
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* m1_i1: VCP_SRC_PROC (source process number)
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* m1_i2: VCP_DST_PROC (destination process number)
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* m1_i3: VCP_VEC_SIZE (vector size)
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* m1_p1: VCP_VEC_ADDR (pointer to vector)
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*
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* Author:
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* Jorrit N. Herder <jnherder@cs.vu.nl>
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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_vcopy *
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*===========================================================================*/
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PUBLIC int do_vcopy(m_ptr)
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register message *m_ptr; /* pointer to request message */
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{
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/* Handle sys_vcopy(). Copy multiple blocks of memory */
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int src_proc, dst_proc, vect_s, i;
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vir_bytes src_vir, dst_vir, vect_addr;
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phys_bytes src_phys, dst_phys, bytes;
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cpvec_t cpvec_table[CPVEC_NR];
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/* Dismember the command message. */
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src_proc = m_ptr->VCP_SRC_PROC;
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dst_proc = m_ptr->VCP_DST_PROC;
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vect_s = m_ptr->VCP_VEC_SIZE;
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vect_addr = (vir_bytes)m_ptr->VCP_VEC_ADDR;
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if (vect_s > CPVEC_NR) return EDOM;
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src_phys= numap_local(m_ptr->m_source, vect_addr, vect_s * sizeof(cpvec_t));
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if (!src_phys) return EFAULT;
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phys_copy(src_phys, vir2phys(cpvec_table),
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(phys_bytes) (vect_s * sizeof(cpvec_t)));
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for (i = 0; i < vect_s; i++) {
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src_vir= cpvec_table[i].cpv_src;
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dst_vir= cpvec_table[i].cpv_dst;
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bytes= cpvec_table[i].cpv_size;
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src_phys = numap_local(src_proc,src_vir,(vir_bytes)bytes);
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dst_phys = numap_local(dst_proc,dst_vir,(vir_bytes)bytes);
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if (src_phys == 0 || dst_phys == 0) return(EFAULT);
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phys_copy(src_phys, dst_phys, bytes);
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}
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return(OK);
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}
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