| /* _Unwind_Resume wrapper for ARM EABI. |
| Copyright (C) 2015-2018 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) |
