sambuc/codezero
1
0
Fork 0
mirror of https://github.com/drasko/codezero.git synced 2026-02-20 22:03:15 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity

sys_write() "seems to" work. Also added support for sys_lseek().

Browse Source
This commit is contained in:
Bahadir Balban
2008-04-23 14:14:45 +01:00
parent 59bdaf22ec
commit 0629ba3c1a
6 changed files with 101 additions and 46 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
tasks/mm0/src/fault.c
View File

@@ -231,7 +231,7 @@ struct vm_obj_link *vma_create_shadow(void)
}
/* Allocates a new page, copies the original onto it and returns. */
struct page *copy_page(struct page *orig)
struct page *copy_to_new_page(struct page *orig)
{
void *new_vaddr, *vaddr, *paddr;
struct page *new;
@@ -349,7 +349,7 @@ struct page *copy_on_write(struct fault_data *fault)
* Copy the page. This traverse and copy is like a page-in operation
* of a pager, except that the page is moving along vm_objects.
*/
new_page = copy_page(page);
new_page = copy_to_new_page(page);
/* Update page details */
spin_lock(&new_page->lock);
@@ -929,6 +929,28 @@ int page_fault_handler(l4id_t sender, fault_kdata_t *fkdata)
return 0;
}
/* Checks if an address range is a validly mapped area for a task */
int validate_task_range(struct tcb *t, unsigned long start,
unsigned long end, unsigned int vmflags)
{
struct vm_area *vma;
start = page_align(start);
end = page_align_up(end);
/* Find the vma that maps that virtual address */
for (unsigned long vaddr = start; vaddr < end; vaddr += PAGE_SIZE) {
if (!(vma = find_vma(vaddr, &t->vm_area_list))) {
printf("%s: No VMA found for 0x%x on task: %d\n",
__FUNCTION__, vaddr, t->tid);
return -EINVAL;
}
if ((vma->flags & vmflags) != vmflags)
return -EINVAL;
}
return 0;
}
/*
* Makes the virtual to page translation for a given user task.
* It traverses the vm_objects and returns the first encountered
@@ -979,8 +1001,8 @@ struct page *task_virt_to_page(struct tcb *t, unsigned long virtual)
}
/* Found it */
printf("%s: %s: Found page with file_offset: 0x%x. vm object:\n",
__TASKNAME__, __FUNCTION__, (unsigned long)page, page->offset);
// printf("%s: %s: Found page with file_offset: 0x%x\n",
// __TASKNAME__, __FUNCTION__, page->offset);
vm_object_print(vmo_link->obj);
return page;