mirror of
git://sourceware.org/git/glibc.git
synced 2025-03-06 20:58:33 +01:00
e7919e0db2
The new riscv_hwprobe syscall also comes with a vDSO for faster answers to your most common questions. Call in today to speak with a kernel representative near you! Signed-off-by: Evan Green <evan@rivosinc.com> Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
88 lines
3 KiB
C
88 lines
3 KiB
C
/* Data for vDSO support. Linux version.
|
|
Copyright (C) 2020-2024 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
/* This file is included in three different modes for both static (libc.a)
|
|
and shared (rtld) modes:
|
|
|
|
1. PROCINFO_DECL is defined, meaning we are only interested in
|
|
declarations. For static it requires use the extern keyword along with
|
|
the attribute_relro while for shared it will be embedded in the
|
|
rtld_global_ro.
|
|
|
|
2. PROCINFO_DECL and SHARED are not defined. Nothing to do, the default
|
|
zero initializion is suffice.
|
|
|
|
3. PROCINFO_DECL is not defined while SHARED is. Similar to 2., the zero
|
|
initialization of rtld_global_ro is suffice. */
|
|
|
|
#ifndef PROCINFO_CLASS
|
|
# define PROCINFO_CLASS
|
|
#endif
|
|
|
|
#ifndef SHARED
|
|
# define RELRO attribute_relro
|
|
#else
|
|
# define RELRO
|
|
#endif
|
|
|
|
#if defined PROCINFO_DECL || !defined SHARED
|
|
# ifdef HAVE_CLOCK_GETTIME_VSYSCALL
|
|
PROCINFO_CLASS int (*_dl_vdso_clock_gettime) (clockid_t,
|
|
struct timespec *) RELRO;
|
|
#endif
|
|
# ifdef HAVE_CLOCK_GETTIME64_VSYSCALL
|
|
PROCINFO_CLASS int (*_dl_vdso_clock_gettime64) (clockid_t,
|
|
struct __timespec64 *) RELRO;
|
|
#endif
|
|
# ifdef HAVE_GETTIMEOFDAY_VSYSCALL
|
|
PROCINFO_CLASS int (*_dl_vdso_gettimeofday) (struct timeval *, void *) RELRO;
|
|
#endif
|
|
# ifdef HAVE_TIME_VSYSCALL
|
|
PROCINFO_CLASS time_t (*_dl_vdso_time) (time_t *) RELRO;
|
|
# endif
|
|
# ifdef HAVE_GETCPU_VSYSCALL
|
|
PROCINFO_CLASS int (*_dl_vdso_getcpu) (unsigned *, unsigned *, void *) RELRO;
|
|
# endif
|
|
# ifdef HAVE_CLOCK_GETRES_VSYSCALL
|
|
PROCINFO_CLASS int (*_dl_vdso_clock_getres) (clockid_t,
|
|
struct timespec *) RELRO;
|
|
# endif
|
|
# ifdef HAVE_CLOCK_GETRES64_VSYSCALL
|
|
PROCINFO_CLASS int (*_dl_vdso_clock_getres_time64) (clockid_t,
|
|
struct __timespec64 *) RELRO;
|
|
# endif
|
|
|
|
/* PowerPC specific ones. */
|
|
# ifdef HAVE_GET_TBFREQ
|
|
PROCINFO_CLASS uint64_t (*_dl_vdso_get_tbfreq)(void) RELRO;
|
|
# endif
|
|
|
|
/* RISC-V specific ones. */
|
|
# ifdef HAVE_RISCV_HWPROBE
|
|
PROCINFO_CLASS int (*_dl_vdso_riscv_hwprobe)(void *,
|
|
size_t,
|
|
size_t,
|
|
unsigned long *,
|
|
unsigned int) RELRO;
|
|
# endif
|
|
|
|
#endif
|
|
|
|
#undef RELRO
|
|
#undef PROCINFO_DECL
|
|
#undef PROCINFO_CLASS
|