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99 lines
3.3 KiB
C
99 lines
3.3 KiB
C
/* vDSO common definition for Linux.
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Copyright (C) 2015-2017 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 SYSDEP_VDSO_LINUX_H
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# define SYSDEP_VDSO_LINUX_H
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#define VDSO_SYMBOL(__name) __vdso_##__name
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#ifndef INTERNAL_VSYSCALL_CALL
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# define INTERNAL_VSYSCALL_CALL(funcptr, err, nr, args...) \
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funcptr (args)
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#endif
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#ifdef SHARED
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# ifdef HAVE_VSYSCALL
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# include <libc-vdso.h>
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# define INLINE_VSYSCALL(name, nr, args...) \
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({ \
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__label__ out; \
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__label__ iserr; \
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INTERNAL_SYSCALL_DECL (sc_err); \
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long int sc_ret; \
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\
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__typeof (__vdso_##name) vdsop = __vdso_##name; \
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PTR_DEMANGLE (vdsop); \
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if (vdsop != NULL) \
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{ \
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sc_ret = INTERNAL_VSYSCALL_CALL (vdsop, sc_err, nr, ##args); \
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if (!INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
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goto out; \
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if (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err) != ENOSYS) \
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goto iserr; \
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} \
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\
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sc_ret = INTERNAL_SYSCALL (name, sc_err, nr, ##args); \
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if (INTERNAL_SYSCALL_ERROR_P (sc_ret, sc_err)) \
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{ \
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iserr: \
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__set_errno (INTERNAL_SYSCALL_ERRNO (sc_ret, sc_err)); \
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sc_ret = -1L; \
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} \
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out: \
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sc_ret; \
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})
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# define INTERNAL_VSYSCALL(name, err, nr, args...) \
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({ \
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__label__ out; \
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long v_ret; \
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\
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__typeof (__vdso_##name) vdsop = __vdso_##name; \
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PTR_DEMANGLE (vdsop); \
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if (vdsop != NULL) \
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{ \
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v_ret = INTERNAL_VSYSCALL_CALL (vdsop, err, nr, ##args); \
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if (!INTERNAL_SYSCALL_ERROR_P (v_ret, err) \
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|| INTERNAL_SYSCALL_ERRNO (v_ret, err) != ENOSYS) \
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goto out; \
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} \
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v_ret = INTERNAL_SYSCALL (name, err, nr, ##args); \
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out: \
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v_ret; \
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})
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# else
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# define INLINE_VSYSCALL(name, nr, args...) \
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INLINE_SYSCALL (name, nr, ##args)
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# define INTERNAL_VSYSCALL(name, err, nr, args...) \
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INTERNAL_SYSCALL (name, err, nr, ##args)
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# endif /* HAVE_VSYSCALL */
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# else /* SHARED */
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# define INLINE_VSYSCALL(name, nr, args...) \
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INLINE_SYSCALL (name, nr, ##args)
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# define INTERNAL_VSYSCALL(name, err, nr, args...) \
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INTERNAL_SYSCALL (name, err, nr, ##args)
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#endif /* SHARED */
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#endif /* SYSDEP_VDSO_LINUX_H */
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