/* RSEQ_* accessors.  i386 version.
   Copyright (C) 2002-2025 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/>.  */

/* Read member of the RSEQ area directly.  */
#define RSEQ_GETMEM(member) \
  ({									      \
     _Static_assert (sizeof (RSEQ_SELF()->member) == 1			      \
		     || sizeof (RSEQ_SELF()->member) == 4		      \
		     || sizeof (RSEQ_SELF()->member) == 8,		      \
		     "size of rseq data");				      \
     (*(__typeof (RSEQ_SELF()->member) __seg_gs *)			      \
      (__rseq_offset + offsetof (struct rseq_area, member)));		      \
  })

/* Read member of the RSEQ area directly, with single-copy atomicity semantics.
   Static assert for types >= 64 bits since they can't be loaded atomically on
   x86-32.  */
#define RSEQ_GETMEM_ONCE(member) \
  ({									      \
     _Static_assert (sizeof (RSEQ_SELF()->member) == 1			      \
		     || sizeof (RSEQ_SELF()->member) == 4,		      \
		     "size of rseq data");				      \
     (*(volatile __typeof (RSEQ_SELF()->member) __seg_gs *)		      \
      (__rseq_offset + offsetof (struct rseq_area, member)));		      \
  })

/* Set member of the RSEQ area directly.  */
#define RSEQ_SETMEM(member, value) \
  ({									      \
     _Static_assert (sizeof (RSEQ_SELF()->member) == 1			      \
		     || sizeof (RSEQ_SELF()->member) == 4		      \
		     || sizeof (RSEQ_SELF()->member) == 8,		      \
		     "size of rseq data");				      \
     (*(__typeof (RSEQ_SELF()->member) __seg_gs *)			      \
      (__rseq_offset + offsetof (struct rseq_area, member)) = (value));	      \
  })

/* Set member of the RSEQ area directly, with single-copy atomicity semantics.
   Static assert for types >= 64 bits since they can't be stored atomically on
   x86-32.  */
#define RSEQ_SETMEM_ONCE(member, value) \
  ({									      \
     _Static_assert (sizeof (RSEQ_SELF()->member) == 1			      \
		     || sizeof (RSEQ_SELF()->member) == 4,		      \
		     "size of rseq data");				      \
     (*(volatile __typeof (RSEQ_SELF()->member) __seg_gs *)		      \
      (__rseq_offset + offsetof (struct rseq_area, member)) = (value));	      \
  })