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- /* Store register values as _Unwind_Word type in DWARF2 EH unwind context.
- Copyright (C) 2017-2022 Free Software Foundation, Inc.
- This file is part of GCC.
- GCC is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 3, or (at your
- option) any later version.
- GCC 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 General Public
- License for more details.
- Under Section 7 of GPL version 3, you are granted additional
- permissions described in the GCC Runtime Library Exception, version
- 3.1, as published by the Free Software Foundation.
- You should have received a copy of the GNU General Public License and
- a copy of the GCC Runtime Library Exception along with this program;
- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
- <http://www.gnu.org/licenses/>. */
- /* Define this macro if the target stores register values as _Unwind_Word
- type in unwind context. Only enable it for ilp32. */
- #if defined __aarch64__ && !defined __LP64__
- # define REG_VALUE_IN_UNWIND_CONTEXT
- #endif
- /* Return the value of the pseudo VG register. This should only be
- called if we know this is an SVE host. */
- static inline int
- aarch64_vg (void)
- {
- register int vg asm ("x0");
- /* CNTD X0. */
- asm (".inst 0x04e0e3e0" : "=r" (vg));
- return vg;
- }
- /* Lazily provide a value for VG, so that we don't try to execute SVE
- instructions unless we know they're needed. */
- #define DWARF_LAZY_REGISTER_VALUE(REGNO, VALUE) \
- ((REGNO) == AARCH64_DWARF_VG && ((*VALUE) = aarch64_vg (), 1))
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