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-/* _Unwind_Resume wrapper for ARM EABI.
- Copyright (C) 2015-2017 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/>. */
-
-#include <sysdep.h>
-
-/* This is just implementing exactly what the C version does.
- We do it in assembly just to ensure that we get an unmolested tail
- call to the libgcc function, which is necessary for the ARM unwinder. */
-
-ENTRY (_Unwind_Resume)
- LDR_HIDDEN (ip, ip, __libgcc_s_resume, 0)
- cmp ip, #0
- beq 1f
-0: PTR_DEMANGLE (ip, ip, r2, r3)
- bx ip
-
- /* We need to save and restore LR (for our own return address)
- and R0 (for the argument to _Unwind_Resume) around the call. */
-1: push {r0, lr}
- cfi_adjust_cfa_offset (8)
- cfi_rel_offset (r0, 0)
- cfi_rel_offset (lr, 4)
- bl __libgcc_s_init
- pop {r0, lr}
- cfi_adjust_cfa_offset (-8)
- cfi_restore (r0)
- cfi_restore (lr)
-
- LDR_HIDDEN (ip, ip, __libgcc_s_resume, 0)
- b 0b
-END (_Unwind_Resume)