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| author | Thomas Weißschuh <thomas.weissschuh@linutronix.de> | 2026-03-04 08:49:05 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@kernel.org> | 2026-03-11 10:18:32 +0100 |
| commit | d60c682bce3dce963d6cf8208ed60d586004ce49 (patch) | |
| tree | 00086870903f2300ca7bc9d5c7b0297debe3a881 /arch/sparc/include/asm/vdso | |
| parent | 10fdbd9517e833de31911c29c5ff2494d62a5551 (diff) | |
| download | lwn-d60c682bce3dce963d6cf8208ed60d586004ce49.tar.gz lwn-d60c682bce3dce963d6cf8208ed60d586004ce49.zip | |
sparc64: vdso: Move syscall fallbacks into header
The generic vDSO libraries expected the syscall fallbacks in
asm/vdso/gettimeofday.h. To prepare the adoption of the generic library,
move the existing functions there.
While at it, rename them so they match what the generic library expects.
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Tested-by: Andreas Larsson <andreas@gaisler.com>
Reviewed-by: Andreas Larsson <andreas@gaisler.com>
Acked-by: Andreas Larsson <andreas@gaisler.com>
Link: https://patch.msgid.link/20260304-vdso-sparc64-generic-2-v6-8-d8eb3b0e1410@linutronix.de
Diffstat (limited to 'arch/sparc/include/asm/vdso')
| -rw-r--r-- | arch/sparc/include/asm/vdso/gettimeofday.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/vdso/gettimeofday.h b/arch/sparc/include/asm/vdso/gettimeofday.h index 31f6505d3ab5..429dc080568f 100644 --- a/arch/sparc/include/asm/vdso/gettimeofday.h +++ b/arch/sparc/include/asm/vdso/gettimeofday.h @@ -6,6 +6,9 @@ #ifndef _ASM_SPARC_VDSO_GETTIMEOFDAY_H #define _ASM_SPARC_VDSO_GETTIMEOFDAY_H +#include <uapi/linux/time.h> +#include <uapi/linux/unistd.h> + #include <linux/types.h> #include <asm/vvar.h> @@ -75,4 +78,51 @@ static __always_inline u64 __arch_get_hw_counter(struct vvar_data *vvar) return vread_tick(); } +#ifdef CONFIG_SPARC64 +#define SYSCALL_STRING \ + "ta 0x6d;" \ + "bcs,a 1f;" \ + " sub %%g0, %%o0, %%o0;" \ + "1:" +#else +#define SYSCALL_STRING \ + "ta 0x10;" \ + "bcs,a 1f;" \ + " sub %%g0, %%o0, %%o0;" \ + "1:" +#endif + +#define SYSCALL_CLOBBERS \ + "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \ + "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \ + "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", \ + "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", \ + "f32", "f34", "f36", "f38", "f40", "f42", "f44", "f46", \ + "f48", "f50", "f52", "f54", "f56", "f58", "f60", "f62", \ + "cc", "memory" + +static __always_inline +long clock_gettime_fallback(clockid_t clock, struct __kernel_old_timespec *ts) +{ + register long num __asm__("g1") = __NR_clock_gettime; + 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 gettimeofday_fallback(struct __kernel_old_timeval *tv, struct timezone *tz) +{ + register long num __asm__("g1") = __NR_gettimeofday; + register long o0 __asm__("o0") = (long) tv; + register long o1 __asm__("o1") = (long) tz; + + __asm__ __volatile__(SYSCALL_STRING : "=r" (o0) : "r" (num), + "0" (o0), "r" (o1) : SYSCALL_CLOBBERS); + return o0; +} + #endif /* _ASM_SPARC_VDSO_GETTIMEOFDAY_H */ |