c78250332d
map_copy_ph_block is replaced by map_clone_ph_block, which can replace a single physical block by multiple physical blocks. also, . merge map_mem.c with region.c, as they manipulate the same data structures . NOTRUNNABLE removed as sanity check . use direct functions for ALLOC_MEM and FREE_MEM again . add some checks to shared memory mapping code . fix for data structure integrity when using shared memory . fix sanity checks
148 lines
3.7 KiB
C
148 lines
3.7 KiB
C
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#define _SYSTEM 1
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#include <minix/callnr.h>
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#include <minix/com.h>
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#include <minix/config.h>
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#include <minix/const.h>
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#include <minix/ds.h>
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#include <minix/endpoint.h>
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#include <minix/keymap.h>
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#include <minix/minlib.h>
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#include <minix/type.h>
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#include <minix/ipc.h>
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#include <minix/sysutil.h>
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#include <minix/syslib.h>
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#include <minix/safecopies.h>
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#include <minix/bitmap.h>
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#include <errno.h>
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#include <string.h>
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#include <env.h>
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#include <stdio.h>
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#include <assert.h>
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#include "glo.h"
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#include "proto.h"
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#include "util.h"
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#include "region.h"
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#define LU_DEBUG 0
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/*===========================================================================*
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* do_rs_set_priv *
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*===========================================================================*/
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PUBLIC int do_rs_set_priv(message *m)
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{
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int r, n, nr;
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struct vmproc *vmp;
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nr = m->VM_RS_NR;
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if ((r = vm_isokendpt(nr, &n)) != OK) {
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printf("do_rs_set_priv: message from strange source %d\n", nr);
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return EINVAL;
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}
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vmp = &vmproc[n];
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if (m->VM_RS_BUF) {
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r = sys_datacopy(m->m_source, (vir_bytes) m->VM_RS_BUF,
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SELF, (vir_bytes) vmp->vm_call_mask,
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sizeof(vmp->vm_call_mask));
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if (r != OK)
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return r;
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}
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return OK;
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}
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/*===========================================================================*
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* do_rs_update *
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*===========================================================================*/
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PUBLIC int do_rs_update(message *m_ptr)
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{
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endpoint_t src_e, dst_e;
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struct vmproc *src_vmp, *dst_vmp;
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struct vmproc orig_src_vmproc, orig_dst_vmproc;
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int src_p, dst_p, r;
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struct vir_region *vr;
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src_e = m_ptr->VM_RS_SRC_ENDPT;
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dst_e = m_ptr->VM_RS_DST_ENDPT;
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/* Let the kernel do the update first. */
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r = sys_update(src_e, dst_e);
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if(r != OK) {
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return r;
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}
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/* Lookup slots for source and destination process. */
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if(vm_isokendpt(src_e, &src_p) != OK) {
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printf("do_rs_update: bad src endpoint %d\n", src_e);
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return EINVAL;
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}
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src_vmp = &vmproc[src_p];
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if(vm_isokendpt(dst_e, &dst_p) != OK) {
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printf("do_rs_update: bad dst endpoint %d\n", dst_e);
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return EINVAL;
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}
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dst_vmp = &vmproc[dst_p];
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#if LU_DEBUG
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printf("do_rs_update: updating %d (%d, %d) into %d (%d, %d)\n",
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src_vmp->vm_endpoint, src_p, src_vmp->vm_slot,
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dst_vmp->vm_endpoint, dst_p, dst_vmp->vm_slot);
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printf("do_rs_update: map_printmap for source before updating:\n");
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map_printmap(src_vmp);
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printf("do_rs_update: map_printmap for destination before updating:\n");
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map_printmap(dst_vmp);
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#endif
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/* Save existing data. */
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orig_src_vmproc = *src_vmp;
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orig_dst_vmproc = *dst_vmp;
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/* Swap slots. */
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*src_vmp = orig_dst_vmproc;
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*dst_vmp = orig_src_vmproc;
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/* Preserve endpoints and slot numbers. */
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src_vmp->vm_endpoint = orig_src_vmproc.vm_endpoint;
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src_vmp->vm_slot = orig_src_vmproc.vm_slot;
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dst_vmp->vm_endpoint = orig_dst_vmproc.vm_endpoint;
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dst_vmp->vm_slot = orig_dst_vmproc.vm_slot;
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/* Preserve vir_region's parents. */
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for(vr = src_vmp->vm_regions; vr; vr = vr->next) {
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vr->parent = src_vmp;
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}
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for(vr = dst_vmp->vm_regions; vr; vr = vr->next) {
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vr->parent = dst_vmp;
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}
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/* Adjust page tables. */
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vm_assert(src_vmp->vm_flags & VMF_HASPT);
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vm_assert(dst_vmp->vm_flags & VMF_HASPT);
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pt_bind(&src_vmp->vm_pt, src_vmp);
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pt_bind(&dst_vmp->vm_pt, dst_vmp);
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if((r=sys_vmctl(SELF, VMCTL_FLUSHTLB, 0)) != OK) {
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panic("do_rs_update: VMCTL_FLUSHTLB failed: %d", r);
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}
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#if LU_DEBUG
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printf("do_rs_update: updated %d (%d, %d) into %d (%d, %d)\n",
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src_vmp->vm_endpoint, src_p, src_vmp->vm_slot,
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dst_vmp->vm_endpoint, dst_p, dst_vmp->vm_slot);
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printf("do_rs_update: map_printmap for source after updating:\n");
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map_printmap(src_vmp);
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printf("do_rs_update: map_printmap for destination after updating:\n");
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map_printmap(dst_vmp);
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#endif
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return OK;
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}
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