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94 lines
3.2 KiB
C
94 lines
3.2 KiB
C
/* Data for vDSO support. Linux version.
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Copyright (C) 2020-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/* This file is included in three different modes for both static (libc.a)
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and shared (rtld) modes:
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1. PROCINFO_DECL is defined, meaning we are only interested in
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declarations. For static it requires use the extern keyword along with
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the attribute_relro while for shared it will be embedded in the
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rtld_global_ro.
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2. PROCINFO_DECL and SHARED are not defined. Nothing to do, the default
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zero initializion is suffice.
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3. PROCINFO_DECL is not defined while SHARED is. Similar to 2., the zero
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initialization of rtld_global_ro is suffice. */
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#ifndef PROCINFO_CLASS
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# define PROCINFO_CLASS
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#endif
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#ifndef SHARED
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# define RELRO attribute_relro
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#else
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# define RELRO
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#endif
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#if defined PROCINFO_DECL || !defined SHARED
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# ifdef HAVE_CLOCK_GETTIME_VSYSCALL
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PROCINFO_CLASS int (*_dl_vdso_clock_gettime) (clockid_t,
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struct timespec *) RELRO;
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#endif
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# ifdef HAVE_CLOCK_GETTIME64_VSYSCALL
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PROCINFO_CLASS int (*_dl_vdso_clock_gettime64) (clockid_t,
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struct __timespec64 *) RELRO;
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#endif
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# ifdef HAVE_GETTIMEOFDAY_VSYSCALL
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PROCINFO_CLASS int (*_dl_vdso_gettimeofday) (struct timeval *, void *) RELRO;
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#endif
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# ifdef HAVE_TIME_VSYSCALL
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PROCINFO_CLASS time_t (*_dl_vdso_time) (time_t *) RELRO;
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# endif
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# ifdef HAVE_GETCPU_VSYSCALL
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PROCINFO_CLASS int (*_dl_vdso_getcpu) (unsigned *, unsigned *, void *) RELRO;
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# endif
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# ifdef HAVE_CLOCK_GETRES_VSYSCALL
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PROCINFO_CLASS int (*_dl_vdso_clock_getres) (clockid_t,
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struct timespec *) RELRO;
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# endif
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# ifdef HAVE_CLOCK_GETRES64_VSYSCALL
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PROCINFO_CLASS int (*_dl_vdso_clock_getres_time64) (clockid_t,
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struct __timespec64 *) RELRO;
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# endif
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# ifdef HAVE_GETRANDOM_VSYSCALL
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PROCINFO_CLASS ssize_t (*_dl_vdso_getrandom) (void *buffer, size_t len,
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unsigned int flags, void *state,
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size_t state_len) RELRO;
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# endif
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/* PowerPC specific ones. */
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# ifdef HAVE_GET_TBFREQ
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PROCINFO_CLASS uint64_t (*_dl_vdso_get_tbfreq)(void) RELRO;
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# endif
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/* RISC-V specific ones. */
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# ifdef HAVE_RISCV_HWPROBE
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PROCINFO_CLASS int (*_dl_vdso_riscv_hwprobe)(void *,
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size_t,
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size_t,
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unsigned long *,
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unsigned int) RELRO;
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# endif
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#endif
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#undef RELRO
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#undef PROCINFO_DECL
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#undef PROCINFO_CLASS
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