1 /*- 2 * Copyright (c) 2021 Jessica Clarke 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26 #include <sys/types.h> 27 #include <sys/elf.h> 28 #include <sys/time.h> 29 #include <sys/vdso.h> 30 31 #include <machine/riscvreg.h> 32 33 #include <errno.h> 34 35 #include "libc_private.h" 36 37 #pragma weak __vdso_gettc 38 int 39 __vdso_gettc(const struct vdso_timehands *th, u_int *tc) 40 { 41 if (th->th_algo != VDSO_TH_ALGO_RISCV_RDTIME) 42 return (ENOSYS); 43 44 *tc = csr_read(time); 45 return (0); 46 } 47 48 #pragma weak __vdso_gettimekeep 49 int 50 __vdso_gettimekeep(struct vdso_timekeep **tk) 51 { 52 return (_elf_aux_info(AT_TIMEKEEP, tk, sizeof(*tk))); 53 } 54