1 // SPDX-License-Identifier: GPL-2.0
32 	current->mm->context.vdso_base = vma->vm_start;  in vdso_mremap()
57 	struct mm_struct *mm = current->mm;  in map_vdso()
63 		return -EINTR;  in map_vdso()
66 		vdso_text_len = vdso32_end - vdso32_start;  in map_vdso()
69 		vdso_text_len = vdso64_end - vdso64_start;  in map_vdso()
90 		current->mm->context.vdso_base = vdso_text_start;  in map_vdso()
98 static unsigned long vdso_addr(unsigned long start, unsigned long len)  in vdso_addr()  argument
103 	 * Round up the start address. It can start out unaligned as a result  in vdso_addr()
104 	 * of stack start randomization.  in vdso_addr()
106 	start = PAGE_ALIGN(start);  in vdso_addr()
108 	/* Round the lowest possible end address up to a PMD boundary. */  in vdso_addr()
109 	end = (start + len + PMD_SIZE - 1) & PMD_MASK;  in vdso_addr()
112 	end -= len;  in vdso_addr()
114 	if (end > start) {  in vdso_addr()
115 		offset = get_random_u32_below(((end - start) >> PAGE_SHIFT) + 1);  in vdso_addr()
116 		addr = start + (offset << PAGE_SHIFT);  in vdso_addr()
118 		addr = start;  in vdso_addr()
128 		size = vdso32_end - vdso32_start;  in vdso_text_size()
130 		size = vdso64_end - vdso64_start;  in vdso_text_size()
144 	if (current->flags & PF_RANDOMIZE)  in arch_setup_additional_pages()
145 		addr = vdso_addr(current->mm->start_stack + PAGE_SIZE, size);  in arch_setup_additional_pages()
149 static struct page ** __init vdso_setup_pages(void *start, void *end)  in vdso_setup_pages()  argument
151 	int pages = (end - start) >> PAGE_SHIFT;  in vdso_setup_pages()
159 		pagelist[i] = virt_to_page(start + i * PAGE_SIZE);  in vdso_setup_pages()
166 	struct alt_instr *start, *end;  in vdso_apply_alternatives()  local
170 	shdr = (void *)hdr + hdr->e_shoff;  in vdso_apply_alternatives()
174 	start = (void *)hdr + alt->sh_offset;  in vdso_apply_alternatives()
175 	end = (void *)hdr + alt->sh_offset + alt->sh_size;  in vdso_apply_alternatives()
176 	apply_alternatives(start, end);  in vdso_apply_alternatives()