arm/kernel/vdso.c

1 // SPDX-License-Identifier: GPL-2.0-only
40 	current->mm->context.vdso = new_vma->vm_start;  in vdso_mremap()
57 /* Cached result of boot-time check for whether the arch timer exists,
74 	np = of_find_compatible_node(NULL, NULL, "arm,armv7-timer");  in cntvct_functional()
76 		np = of_find_compatible_node(NULL, NULL, "arm,armv8-timer");  in cntvct_functional()
80 	if (of_property_read_bool(np, "arm,cpu-registers-not-fw-configured"))  in cntvct_functional()
99 	sechdrs = (void *)ehdr + ehdr->e_shoff;  in find_section()
100 	secnames = (void *)ehdr + sechdrs[ehdr->e_shstrndx].sh_offset;  in find_section()
103 	for (i = 1; i < ehdr->e_shnum; i++) {  in find_section()
120 	for (i = 0; i < (lib->dynsymsize / sizeof(Elf32_Sym)); i++) {  in find_symbol()
123 		if (lib->dynsym[i].st_name == 0)  in find_symbol()
125 		strscpy(name, lib->dynstr + lib->dynsym[i].st_name,  in find_symbol()
131 			return &lib->dynsym[i];  in find_symbol()
144 	sym->st_name = 0;  in vdso_nullpatch_one()
158 	/* If the virtual counter is absent or non-functional we don't  in patch_vdso()
176 		return -ENOEXEC;  in vdso_init()
179 	text_pages = (vdso_end - vdso_start) >> PAGE_SHIFT;  in vdso_init()
185 		return -ENOMEM;  in vdso_init()
210 /* assumes mmap_lock is write-locked */
216 	mm->context.vdso = 0;  in arm_install_vdso()
226 	len = (vdso_total_pages - VDSO_NR_PAGES) << PAGE_SHIFT;  in arm_install_vdso()
233 		mm->context.vdso = addr;  in arm_install_vdso()