/* AArch64 GCS (Guarded Control Stack) declarations.
This file is part of the GNU C Library.
Copyright (C) 2024-2025 Free Software Foundation, Inc.
Copyright The GNU Toolchain Authors.
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
. */
#ifndef _AARCH64_GCS_H
#define _AARCH64_GCS_H
#include
#include
struct gcs_record
{
void *gcs_base;
void *gcs_token;
size_t gcs_size;
};
void *__alloc_gcs (size_t, struct gcs_record *) attribute_hidden;
static inline bool
has_gcs (void)
{
register unsigned long x16 asm ("x16") = 1;
asm ("hint 40" /* chkfeat x16 */ : "+r" (x16));
return x16 == 0;
}
#endif