1// Exception handling and frame unwind runtime interface routines. 2// Copyright (C) 2011-2020 Free Software Foundation, Inc. 3 4// GCC is free software; you can redistribute it and/or modify it under 5// the terms of the GNU General Public License as published by the Free 6// Software Foundation; either version 3, or (at your option) any later 7// version. 8 9// GCC is distributed in the hope that it will be useful, but WITHOUT ANY 10// WARRANTY; without even the implied warranty of MERCHANTABILITY or 11// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12// for more details. 13 14// Under Section 7 of GPL version 3, you are granted additional 15// permissions described in the GCC Runtime Library Exception, version 16// 3.1, as published by the Free Software Foundation. 17 18// You should have received a copy of the GNU General Public License and 19// a copy of the GCC Runtime Library Exception along with this program; 20// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 21// <http://www.gnu.org/licenses/>. 22 23// extern(C) interface for the ARM EABI unwinder library. 24// This corresponds to unwind-arm.h 25 26module gcc.unwind.arm; 27 28import gcc.config; 29 30version (ARM): 31static if (GNU_ARM_EABI_Unwinder): 32 33public import gcc.unwind.arm_common; 34import gcc.unwind.pe; 35 36extern (C): 37@nogc: 38 39enum int UNWIND_STACK_REG = 13; 40// Use IP as a scratch register within the personality routine. 41enum int UNWIND_POINTER_REG = 12; 42 43version (linux) 44 enum _TTYPE_ENCODING = (DW_EH_PE_pcrel | DW_EH_PE_indirect); 45else version (NetBSD) 46 enum _TTYPE_ENCODING = (DW_EH_PE_pcrel | DW_EH_PE_indirect); 47else version (FreeBSD) 48 enum _TTYPE_ENCODING = (DW_EH_PE_pcrel | DW_EH_PE_indirect); 49else version (Symbian) 50 enum _TTYPE_ENCODING = (DW_EH_PE_absptr); 51else version (uClinux) 52 enum _TTYPE_ENCODING = (DW_EH_PE_absptr); 53else 54 enum _TTYPE_ENCODING = (DW_EH_PE_pcrel); 55 56// Return the address of the instruction, not the actual IP value. 57_Unwind_Word _Unwind_GetIP(_Unwind_Context* context) 58{ 59 return _Unwind_GetGR(context, 15) & ~ cast(_Unwind_Word) 1; 60} 61 62void _Unwind_SetIP(_Unwind_Context* context, _Unwind_Word val) 63{ 64 return _Unwind_SetGR(context, 15, val | (_Unwind_GetGR(context, 15) & 1)); 65} 66 67_Unwind_Word _Unwind_GetIPInfo(_Unwind_Context* context, int* ip_before_insn) 68{ 69 *ip_before_insn = 0; 70 return _Unwind_GetIP(context); 71} 72