Add VDSO support to sparc.
* sysdeps/unix/sysv/linux/sparc/init-first.c: New file. * sysdeps/unix/sysv/linux/sparc/libc-vdso.h: New file. * sysdeps/unix/sysv/linux/sparc/Makefile: Add dl-vdso to sysdep_routines in subdir elf. * sysdeps/unix/sysv/linux/sparc/Versions: Add GLIBC_PRIVATE version for __vdso_clock_gettime. * sysdeps/unix/sysv/linux/sparc/sysdep.h (INTERNAL_VSYSCALL_CALL): Define. (HAVE_CLOCK_GETTIME_VSYSCALL): Define. (HAVE_GETTIMEOFDAY_VSYSCALL): Define.
This commit is contained in:
David S. Miller
parent
0a271c8f25
commit
94a3a27f5d
11
ChangeLog
11
ChangeLog
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@ -1,5 +1,16 @@
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2018-10-18 David S. Miller <davem@davemloft.net>
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* sysdeps/unix/sysv/linux/sparc/init-first.c: New file.
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* sysdeps/unix/sysv/linux/sparc/libc-vdso.h: New file.
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* sysdeps/unix/sysv/linux/sparc/Makefile: Add dl-vdso to
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sysdep_routines in subdir elf.
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* sysdeps/unix/sysv/linux/sparc/Versions: Add GLIBC_PRIVATE
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version for __vdso_clock_gettime.
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* sysdeps/unix/sysv/linux/sparc/sysdep.h (INTERNAL_VSYSCALL_CALL):
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Define.
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(HAVE_CLOCK_GETTIME_VSYSCALL): Define.
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(HAVE_GETTIMEOFDAY_VSYSCALL): Define.
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* sysdeps/sparc/fpu/libm-test-ulps: Regenerated.
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2018-10-17 H.J. Lu <hongjiu.lu@intel.com>
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@ -7,6 +7,10 @@ librt-routines += rt-sysdep
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librt-shared-only-routines += rt-sysdep
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endif
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ifeq ($(subdir),elf)
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sysdep_routines += dl-vdso
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endif
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ifeq ($(subdir),sysvipc)
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sysdep_routines += getshmlba
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endif
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@ -29,6 +29,10 @@ libc {
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__getshmlba;
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}
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GLIBC_PRIVATE {
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# nptl/pthread_cond_timedwait.c uses INTERNAL_VSYSCALL(clock_gettime).
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__vdso_clock_gettime;
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}
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}
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libpthread {
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@ -0,0 +1,46 @@
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/* SPARC VDSO initialization
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Copyright (C) 2018 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 License as
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published by the Free Software Foundation; either version 2.1 of the
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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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<http://www.gnu.org/licenses/>. */
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#ifdef SHARED
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# include <dl-vdso.h>
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# include <libc-vdso.h>
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long int (*VDSO_SYMBOL (gettimeofday)) (struct timeval *, void *)
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attribute_hidden;
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long int (*VDSO_SYMBOL (clock_gettime)) (clockid_t, struct timespec *)
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attribute_hidden;
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static inline void
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_libc_vdso_platform_setup (void)
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{
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PREPARE_VERSION_KNOWN (linux_version, LINUX_2_6);
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void *p = _dl_vdso_vsym ("__vdso_gettimeofday", &linux_version);
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PTR_MANGLE (p);
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VDSO_SYMBOL (gettimeofday) = p;
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p = _dl_vdso_vsym ("__vdso_clock_gettime", &linux_version);
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PTR_MANGLE (p);
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VDSO_SYMBOL (clock_gettime) = p;
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}
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# define VDSO_SETUP _libc_vdso_platform_setup
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#endif
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#include <csu/init-first.c>
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@ -0,0 +1,33 @@
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/* VDSO function pointer declarations.
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Copyright (C) 2018 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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<http://www.gnu.org/licenses/>. */
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#ifndef _LIBC_VDSO_H
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#define _LIBC_VDSO_H
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#ifdef SHARED
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# include <sysdep-vdso.h>
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extern long int (*VDSO_SYMBOL(gettimeofday)) (struct timeval *, void *)
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attribute_hidden;
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extern long int (*VDSO_SYMBOL(clock_gettime)) (clockid_t, struct timespec *);
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#endif
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#endif /* _LIBC_VDSO_H */
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@ -34,6 +34,17 @@
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#else /* __ASSEMBLER__ */
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#define INTERNAL_VSYSCALL_CALL(funcptr, err, nr, args...) \
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({ \
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long _ret = funcptr (args); \
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err = ((unsigned long) (_ret) >= (unsigned long) -4095L); \
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_ret; \
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})
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/* List of system calls which are supported as vsyscalls. */
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# define HAVE_CLOCK_GETTIME_VSYSCALL 1
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# define HAVE_GETTIMEOFDAY_VSYSCALL 1
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#undef INLINE_SYSCALL
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#define INLINE_SYSCALL(name, nr, args...) \
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({ INTERNAL_SYSCALL_DECL(err); \
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