As you've suggested, I've changed my programs this way:
for(vm = mm->mmap; vm != NULL; vm = vm->vm_next)
vma = mtpmc_mk_vm_wrprotected(vm);
for (addr = vm->vm_start; addr<vm->vm_end; addr+=PAGE_SIZE){
pte = mtpmc_get_pte_from_address(mm, addr);
if (pte != NULL)
if (pte_write(*pte)){
set_pte(pte, pte_wrprotect(*pte));
page = mtpmc_mk_page_wrprotected(addr);
list_add_tail(&page->list, &vma->pages_list);
}
}
list_add_tail(&vma->list, &vm_write_protected);
vma->vm_start = vm->vm_start;
vma->vm_end = vma->vm_end;
And all works well. But I've once again the problem of "Unable to hanlde
NULL..." when I try, after the operations above, to delete/add an element in
the page list associated with a vma.
When I want to di it, I execute:
vma = list_entry(vma_list, struct mtpmc_vm_wrprotected, list);
list_for_each_safe(page_list, temp_page_list, &wr_vma->pages_list){
page = mtpmc_mk_page_wrprotected(addr);
list_add_tail(&page->list,&wr_vma->pages_list);
/* or list_del_init(page_list); */
}
It seems to be the same error that I've exposed in my previous email.
When I'm wrong?
Thanks.
Vincenzo Mallozzi.
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