| __vdso_gettc.c (302408) | __vdso_gettc.c (305866) |
|---|---|
| 1/*- 2 * Copyright (c) 2015 The FreeBSD Foundation 3 * 4 * This software was developed by Konstantin Belousov 5 * under sponsorship from the FreeBSD Foundation. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions --- 13 unchanged lines hidden (view full) --- 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 2015 The FreeBSD Foundation 3 * 4 * This software was developed by Konstantin Belousov 5 * under sponsorship from the FreeBSD Foundation. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions --- 13 unchanged lines hidden (view full) --- 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> |
| 30__FBSDID("$FreeBSD: stable/11/lib/libc/arm/sys/__vdso_gettc.c 292709 2015-12-24 22:13:52Z kib $"); | 30__FBSDID("$FreeBSD: stable/11/lib/libc/arm/sys/__vdso_gettc.c 305866 2016-09-16 10:04:28Z kib $"); |
| 31 32#include <sys/types.h> 33#include <sys/elf.h> 34#include <sys/time.h> 35#include <sys/vdso.h> 36#include <machine/cpufunc.h> 37#include <machine/acle-compat.h> | 31 32#include <sys/types.h> 33#include <sys/elf.h> 34#include <sys/time.h> 35#include <sys/vdso.h> 36#include <machine/cpufunc.h> 37#include <machine/acle-compat.h> |
| 38#include <errno.h> |
|
| 38#include "libc_private.h" 39 40#if __ARM_ARCH >= 6 41static inline uint64_t 42cp15_cntvct_get(void) 43{ 44 uint64_t reg; 45 --- 7 unchanged lines hidden (view full) --- 53 uint64_t reg; 54 55 __asm __volatile("mrrc\tp15, 0, %Q0, %R0, c14" : "=r" (reg)); 56 return (reg); 57} 58#endif 59 60#pragma weak __vdso_gettc | 39#include "libc_private.h" 40 41#if __ARM_ARCH >= 6 42static inline uint64_t 43cp15_cntvct_get(void) 44{ 45 uint64_t reg; 46 --- 7 unchanged lines hidden (view full) --- 54 uint64_t reg; 55 56 __asm __volatile("mrrc\tp15, 0, %Q0, %R0, c14" : "=r" (reg)); 57 return (reg); 58} 59#endif 60 61#pragma weak __vdso_gettc |
| 61u_int 62__vdso_gettc(const struct vdso_timehands *th) | 62int 63__vdso_gettc(const struct vdso_timehands *th, u_int *tc) |
| 63{ | 64{ |
| 64 uint64_t val; | |
| 65 | 65 |
| 66 if (th->th_algo != VDSO_TH_ALGO_ARM_GENTIM) 67 return (ENOSYS); |
|
| 66#if __ARM_ARCH >= 6 67 /* 68 * Userspace gettimeofday() is only enabled on ARMv7 CPUs, but 69 * libc is compiled for ARMv6. Due to clang issues, .arch 70 * armv7-a directive does not work. 71 */ 72 __asm __volatile(".word\t0xf57ff06f" : : : "memory"); /* isb */ | 68#if __ARM_ARCH >= 6 69 /* 70 * Userspace gettimeofday() is only enabled on ARMv7 CPUs, but 71 * libc is compiled for ARMv6. Due to clang issues, .arch 72 * armv7-a directive does not work. 73 */ 74 __asm __volatile(".word\t0xf57ff06f" : : : "memory"); /* isb */ |
| 73 val = th->th_physical == 0 ? cp15_cntvct_get() : cp15_cntpct_get(); | 75 *tc = th->th_physical == 0 ? cp15_cntvct_get() : cp15_cntpct_get(); 76 return (0); |
| 74#else | 77#else |
| 75 val = 0; | 78 *tc = 0; 79 return (ENOSYS); |
| 76#endif | 80#endif |
| 77 return (val); | |
| 78} 79 80#pragma weak __vdso_gettimekeep 81int 82__vdso_gettimekeep(struct vdso_timekeep **tk) 83{ 84 85 return (_elf_aux_info(AT_TIMEKEEP, tk, sizeof(*tk))); 86} | 81} 82 83#pragma weak __vdso_gettimekeep 84int 85__vdso_gettimekeep(struct vdso_timekeep **tk) 86{ 87 88 return (_elf_aux_info(AT_TIMEKEEP, tk, sizeof(*tk))); 89} |