1 // SPDX-License-Identifier: GPL-2.0-only
51 	unsigned long new_size = new_vma->vm_end - new_vma->vm_start;  in vdso_mremap()
55 	vdso_size = (vdso_total_pages - 1) << PAGE_SHIFT;  in vdso_mremap()
58 		return -EINVAL;  in vdso_mremap()
60 	current->mm->context.vdso = new_vma->vm_start;  in vdso_mremap()
77 /* Cached result of boot-time check for whether the arch timer exists,
94 	np = of_find_compatible_node(NULL, NULL, "arm,armv7-timer");  in cntvct_functional()
98 	if (of_property_read_bool(np, "arm,cpu-registers-not-fw-configured"))  in cntvct_functional()
117 	sechdrs = (void *)ehdr + ehdr->e_shoff;  in find_section()
118 	secnames = (void *)ehdr + sechdrs[ehdr->e_shstrndx].sh_offset;  in find_section()
121 	for (i = 1; i < ehdr->e_shnum; i++) {  in find_section()
138 	for (i = 0; i < (lib->dynsymsize / sizeof(Elf32_Sym)); i++) {  in find_symbol()
141 		if (lib->dynsym[i].st_name == 0)  in find_symbol()
143 		strlcpy(name, lib->dynstr + lib->dynsym[i].st_name,  in find_symbol()
149 			return &lib->dynsym[i];  in find_symbol()
162 	sym->st_name = 0;  in vdso_nullpatch_one()
176 	/* If the virtual counter is absent or non-functional we don't  in patch_vdso()
193 		return -ENOEXEC;  in vdso_init()
196 	text_pages = (vdso_end - vdso_start) >> PAGE_SHIFT;  in vdso_init()
202 		return -ENOMEM;  in vdso_init()
239 /* assumes mmap_sem is write-locked */
245 	mm->context.vdso = 0;  in arm_install_vdso()
255 	len = (vdso_total_pages - 1) << PAGE_SHIFT;  in arm_install_vdso()
262 		mm->context.vdso = addr;  in arm_install_vdso()
267 	++vdso_data->seq_count;  in vdso_write_begin()
274 	++vdso_data->seq_count;  in vdso_write_end()
282 	if (!tk->tkr_mono.clock->archdata.vdso_direct)  in tk_is_cntvct()
289  * update_vsyscall - update the vdso data page
308 	struct timespec64 *wtm = &tk->wall_to_monotonic;  in update_vsyscall()
319 	vdso_data->tk_is_cntvct			= tk_is_cntvct(tk);  in update_vsyscall()
320 	vdso_data->xtime_coarse_sec		= tk->xtime_sec;  in update_vsyscall()
321 	vdso_data->xtime_coarse_nsec		= (u32)(tk->tkr_mono.xtime_nsec >>  in update_vsyscall()
322 							tk->tkr_mono.shift);  in update_vsyscall()
323 	vdso_data->wtm_clock_sec		= wtm->tv_sec;  in update_vsyscall()
324 	vdso_data->wtm_clock_nsec		= wtm->tv_nsec;  in update_vsyscall()
326 	if (vdso_data->tk_is_cntvct) {  in update_vsyscall()
327 		vdso_data->cs_cycle_last	= tk->tkr_mono.cycle_last;  in update_vsyscall()
328 		vdso_data->xtime_clock_sec	= tk->xtime_sec;  in update_vsyscall()
329 		vdso_data->xtime_clock_snsec	= tk->tkr_mono.xtime_nsec;  in update_vsyscall()
330 		vdso_data->cs_mult		= tk->tkr_mono.mult;  in update_vsyscall()
331 		vdso_data->cs_shift		= tk->tkr_mono.shift;  in update_vsyscall()
332 		vdso_data->cs_mask		= tk->tkr_mono.mask;  in update_vsyscall()
342 	vdso_data->tz_minuteswest	= sys_tz.tz_minuteswest;  in update_vsyscall_tz()
343 	vdso_data->tz_dsttime		= sys_tz.tz_dsttime;  in update_vsyscall_tz()