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Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
69 lines
1.4 KiB
C
69 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2011 Richard Weinberger <richrd@nod.at>
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*
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* This vDSO turns all calls into a syscall so that UML can trap them.
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*/
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/* Disable profiling for userspace code */
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#define DISABLE_BRANCH_PROFILING
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#include <linux/time.h>
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#include <linux/getcpu.h>
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#include <asm/unistd.h>
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int __vdso_clock_gettime(clockid_t clock, struct timespec *ts)
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{
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long ret;
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asm("syscall" : "=a" (ret) :
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"0" (__NR_clock_gettime), "D" (clock), "S" (ts) : "memory");
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return ret;
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}
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int clock_gettime(clockid_t, struct timespec *)
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__attribute__((weak, alias("__vdso_clock_gettime")));
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int __vdso_gettimeofday(struct timeval *tv, struct timezone *tz)
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{
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long ret;
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asm("syscall" : "=a" (ret) :
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"0" (__NR_gettimeofday), "D" (tv), "S" (tz) : "memory");
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return ret;
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}
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int gettimeofday(struct timeval *, struct timezone *)
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__attribute__((weak, alias("__vdso_gettimeofday")));
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time_t __vdso_time(time_t *t)
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{
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long secs;
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asm volatile("syscall"
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: "=a" (secs)
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: "0" (__NR_time), "D" (t) : "cc", "r11", "cx", "memory");
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return secs;
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}
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int time(time_t *t) __attribute__((weak, alias("__vdso_time")));
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long
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__vdso_getcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *unused)
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{
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/*
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* UML does not support SMP, we can cheat here. :)
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*/
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if (cpu)
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*cpu = 0;
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if (node)
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*node = 0;
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return 0;
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}
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long getcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *tcache)
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__attribute__((weak, alias("__vdso_getcpu")));
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