glibc/sysdeps/unix/sysv/linux/mips/sysdep.h

/* Syscall definitions, Linux MIPS generic version.
   Copyright (C) 2019-2020 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
   <http://www.gnu.org/licenses/>.  */

#define VDSO_NAME  "LINUX_2.6"
#define VDSO_HASH  61765110

/* List of system calls which are supported as vsyscalls.  */
#define HAVE_CLOCK_GETTIME_VSYSCALL     "__vdso_clock_gettime"
#define HAVE_GETTIMEOFDAY_VSYSCALL      "__vdso_gettimeofday"

#ifndef __ASSEMBLER__

/* Standard MIPS syscalls have an error flag, and return a positive errno
   when the error flag is set. Emulate this behaviour for vsyscalls so that
   the INTERNAL_SYSCALL_{ERROR_P,ERRNO} macros work correctly.  */
#define INTERNAL_VSYSCALL_CALL(funcptr, err, nr, args...)		\
  ({									\
    long _ret = funcptr (args);						\
    err = ((unsigned long) (_ret) >= (unsigned long) -4095L);		\
    if (err)								\
      _ret = -_ret;							\
    _ret;								\
  })

#endif /* __ASSEMBLER__  */