[PATCH v6 13/14] sparc64: vdso: Implement clock_gettime64()
Thomas Weißschuh <[email protected]>
| Newsgroups | org.kernel.vger.sparclinux,dev.linux.lists.loongarch,org.infradead.lists.linux-arm-kernel,org.kernel.vger.linux-kernel,org.kernel.vger.linux-kselftest,org.kernel.vger.linux-mips,org.kernel.vger.linux-s390,org.ozlabs.lists.linuxppc-dev |
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| Message-ID | <[email protected]> |
To be y2038-safe, 32-bit userspace needs to explicitly call the 64-bit safe time APIs. Implement clock_gettime64() in the 32-bit vDSO. Signed-off-by: Thomas Weißschuh <[email protected]> Tested-by: Andreas Larsson <[email protected]> Reviewed-by: Andreas Larsson <[email protected]> Acked-by: Andreas Larsson <[email protected]> --- arch/sparc/include/asm/vdso/gettimeofday.h | 20 ++++++++++++++++++-- arch/sparc/vdso/vclock_gettime.c | 8 ++++++++ arch/sparc/vdso/vdso32/vdso32.lds.S | 2 ++ 3 files changed, 28 insertions(+), 2 deletions(-) diff --git a/arch/sparc/include/asm/vdso/gettimeofday.h b/arch/sparc/include/asm/vdso/gettimeofday.h index a35875fba454..b0c80c8a28bb 100644 --- a/arch/sparc/include/asm/vdso/gettimeofday.h +++ b/arch/sparc/include/asm/vdso/gettimeofday.h @@ -101,6 +101,8 @@ static __always_inline u64 __arch_get_hw_counter(s32 clock_mode, const struct vd "f48", "f50", "f52", "f54", "f56", "f58", "f60", "f62", \ "cc", "memory" +#ifdef CONFIG_SPARC64 + static __always_inline long clock_gettime_fallback(clockid_t clock, struct __kernel_timespec *ts) { @@ -113,7 +115,20 @@ long clock_gettime_fallback(clockid_t clock, struct __kernel_timespec *ts) return o0; } -#ifndef CONFIG_SPARC64 +#else /* !CONFIG_SPARC64 */ + +static __always_inline +long clock_gettime_fallback(clockid_t clock, struct __kernel_timespec *ts) +{ + register long num __asm__("g1") = __NR_clock_gettime64; + register long o0 __asm__("o0") = clock; + register long o1 __asm__("o1") = (long) ts; + + __asm__ __volatile__(SYSCALL_STRING : "=r" (o0) : "r" (num), + "0" (o0), "r" (o1) : SYSCALL_CLOBBERS); + return o0; +} + static __always_inline long clock_gettime32_fallback(clockid_t clock, struct old_timespec32 *ts) { @@ -125,7 +140,8 @@ long clock_gettime32_fallback(clockid_t clock, struct old_timespec32 *ts) "0" (o0), "r" (o1) : SYSCALL_CLOBBERS); return o0; } -#endif + +#endif /* CONFIG_SPARC64 */ static __always_inline long gettimeofday_fallback(struct __kernel_old_timeval *tv, struct timezone *tz) diff --git a/arch/sparc/vdso/vclock_gettime.c b/arch/sparc/vdso/vclock_gettime.c index 093a7ff4dafc..1d9859392e4c 100644 --- a/arch/sparc/vdso/vclock_gettime.c +++ b/arch/sparc/vdso/vclock_gettime.c @@ -48,4 +48,12 @@ int __vdso_clock_gettime(clockid_t clock, struct old_timespec32 *ts) int clock_gettime(clockid_t, struct old_timespec32 *) __weak __alias(__vdso_clock_gettime); +int __vdso_clock_gettime64(clockid_t clock, struct __kernel_timespec *ts) +{ + return __cvdso_clock_gettime(clock, ts); +} + +int clock_gettime64(clockid_t, struct __kernel_timespec *) + __weak __alias(__vdso_clock_gettime64); + #endif diff --git a/arch/sparc/vdso/vdso32/vdso32.lds.S b/arch/sparc/vdso/vdso32/vdso32.lds.S index 53575ee154c4..a14e4f77e6f2 100644 --- a/arch/sparc/vdso/vdso32/vdso32.lds.S +++ b/arch/sparc/vdso/vdso32/vdso32.lds.S @@ -17,6 +17,8 @@ VERSION { global: clock_gettime; __vdso_clock_gettime; + clock_gettime64; + __vdso_clock_gettime64; gettimeofday; __vdso_gettimeofday; local: *; -- 2.53.0