Lines Matching defs:area

101  * Execute out of line area: anonymous executable mapping installed
484  * @vma: the probed virtual memory area.
608  * @vma: the probed virtual memory area.
622  * @vma: the probed virtual memory area.
1682 	struct xol_area *area = vma->vm_mm->uprobes_state.xol_area;
1684 	vmf->page = area->page;
1707 static int xol_add_vma(struct mm_struct *mm, struct xol_area *area)
1720 	if (!area->vaddr) {
1721 		area->vaddr = arch_uprobe_get_xol_area();
1722 		if (IS_ERR_VALUE(area->vaddr)) {
1723 			ret = area->vaddr;
1728 	vma = _install_special_mapping(mm, area->vaddr, PAGE_SIZE,
1739 	smp_store_release(&mm->uprobes_state.xol_area, area); /* ^^^ */
1758 	struct xol_area *area;
1761 	area = kzalloc_obj(*area);
1762 	if (unlikely(!area))
1765 	area->bitmap = kcalloc(BITS_TO_LONGS(UINSNS_PER_PAGE), sizeof(long),
1767 	if (!area->bitmap)
1770 	area->page = alloc_page(GFP_HIGHUSER | __GFP_ZERO);
1771 	if (!area->page)
1774 	area->vaddr = vaddr;
1775 	init_waitqueue_head(&area->wq);
1777 	set_bit(0, area->bitmap);
1779 	arch_uprobe_copy_ixol(area->page, 0, insns, insns_size);
1781 	if (!xol_add_vma(mm, area))
1782 		return area;
1784 	__free_page(area->page);
1786 	kfree(area->bitmap);
1788 	kfree(area);
1795  * This area will be used for storing instructions for execution out of line.
1797  * Returns the allocated area or NULL.
1802 	struct xol_area *area;
1808 	area = READ_ONCE(mm->uprobes_state.xol_area); /* ^^^ */
1809 	return area;
1813  * uprobe_clear_state - Free the area allocated for slots.
1817 	struct xol_area *area = mm->uprobes_state.xol_area;
1823 	if (!area)
1826 	put_page(area->page);
1827 	kfree(area->bitmap);
1828 	kfree(area);
1850 static unsigned long xol_get_slot_nr(struct xol_area *area)
1854 	slot_nr = find_first_zero_bit(area->bitmap, UINSNS_PER_PAGE);
1856 		if (!test_and_set_bit(slot_nr, area->bitmap))
1868 	struct xol_area *area = get_xol_area();
1871 	if (!area)
1874 	wait_event(area->wq, (slot_nr = xol_get_slot_nr(area)) < UINSNS_PER_PAGE);
1876 	utask->xol_vaddr = area->vaddr + slot_nr * UPROBE_XOL_SLOT_BYTES;
1877 	arch_uprobe_copy_ixol(area->page, utask->xol_vaddr,
1887 	struct xol_area *area = current->mm->uprobes_state.xol_area;
1888 	unsigned long offset = utask->xol_vaddr - area->vaddr;
1892 	/* xol_vaddr must fit into [area->vaddr, area->vaddr + PAGE_SIZE) */
1897 	clear_bit(slot_nr, area->bitmap);
1899 	if (waitqueue_active(&area->wq))
1900 		wake_up(&area->wq);
2174 		uprobe_warn(current, "dup xol area");
2184 	struct xol_area *area;
2198 	area = mm->uprobes_state.xol_area;
2199 	if (!area)
2200 		return uprobe_warn(t, "dup xol area");
2205 	t->utask->dup_xol_addr = area->vaddr;
2211  * Current area->vaddr notion assume the trampoline address is always
2212  * equal area->vaddr.
2219 	struct xol_area *area;
2222 	area = READ_ONCE(current->mm->uprobes_state.xol_area); /* ^^^ */
2223 	if (area)
2224 		trampoline_vaddr = area->vaddr;