/*===========================================================================*
* munmap_text (override for VM) *
*===========================================================================*/
PUBLIC int minix_munmap_text(void *addr, size_t len)
{
vir_bytes laddr;
if(!unmap_ok)
return ENOSYS;
laddr = (vir_bytes) arch_vir2map_text(&vmproc[VM_PROC_NR],
(vir_bytes) addr);
return munmap_lin(laddr, len);
}
/*===========================================================================*
* do_munmap *
*===========================================================================*/
PUBLIC int do_munmap(message *m)
{
int r, n;
struct vmproc *vmp;
vir_bytes addr, len;
struct vir_region *vr;
if((r=vm_isokendpt(m->m_source, &n)) != OK) {
panic("do_mmap: message from strange source: %d", m->m_source);
}
vmp = &vmproc[n];
if(!(vmp->vm_flags & VMF_HASPT))
return ENXIO;
if(m->m_type == VM_MUNMAP) {
addr = (vir_bytes) arch_vir2map(vmp, (vir_bytes) m->VMUM_ADDR);
} else if(m->m_type == VM_MUNMAP_TEXT) {
addr = (vir_bytes) arch_vir2map_text(vmp, (vir_bytes) m->VMUM_ADDR);
} else {
panic("do_munmap: strange type");
}
if(!(vr = map_lookup(vmp, addr))) {
printf("VM: unmap: virtual address %p not found in %d\n",
m->VMUM_ADDR, vmp->vm_endpoint);
return EFAULT;
}
len = m->VMUM_LEN;
if (len % VM_PAGE_SIZE)
len += VM_PAGE_SIZE - (len % VM_PAGE_SIZE);
if(addr != vr->vaddr || len > vr->length || len < VM_PAGE_SIZE) {
return EFAULT;
}
if(map_unmap_region(vmp, vr, len) != OK)
panic("do_munmap: map_unmap_region failed");
return OK;
}
int scall_munmap(kipc_msg_t *m)
{
int r, n;
struct vmproc *vmp;
vir_bytes addr, len;
struct vir_region *vr;
if((r = vm_isokendpt(m->m_source, &n)) != 0) {
vm_panic("do_mmap: message from strange source", m->m_source);
}
vmp = &vmproc[n];
if (!(vmp->vm_flags & VMF_HASPT))
return -ENXIO;
if (m->m_type == NNR_VM_MUNMAP) {
addr = (vir_bytes) arch_vir2map(vmp, (vir_bytes) m->VMUM_ADDR);
} else if(m->m_type == NNR_VM_MUNMAP_TEXT) {
addr = (vir_bytes) arch_vir2map_text(vmp, (vir_bytes) m->VMUM_ADDR);
} else {
vm_panic("do_munmap: strange type", NO_NUM);
}
if (!(vr = map_lookup(vmp, addr))) {
printk("VM: unmap: virtual address 0x%lx not found in %d\n",
m->VMUM_ADDR, vmp->vm_endpoint);
return -EFAULT;
}
len = m->VMUM_LEN;
if (len % VM_PAGE_SIZE)
len += VM_PAGE_SIZE - (len % VM_PAGE_SIZE);
if (addr != vr->vaddr || len > vr->length || len < VM_PAGE_SIZE) {
return -EFAULT;
}
if (map_unmap_region(vmp, vr, len) != 0)
vm_panic("do_munmap: map_unmap_region failed", NO_NUM);
return 0;
}
