1 /* arm64 ABI-specified defaults for DWARF CFI. 2 Copyright (C) 2013, 2018 Red Hat, Inc. 3 This file is part of elfutils. 4 5 This file is free software; you can redistribute it and/or modify 6 it under the terms of either 7 8 * the GNU Lesser General Public License as published by the Free 9 Software Foundation; either version 3 of the License, or (at 10 your option) any later version 11 12 or 13 14 * the GNU General Public License as published by the Free 15 Software Foundation; either version 2 of the License, or (at 16 your option) any later version 17 18 or both in parallel, as here. 19 20 elfutils is distributed in the hope that it will be useful, but 21 WITHOUT ANY WARRANTY; without even the implied warranty of 22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 23 General Public License for more details. 24 25 You should have received copies of the GNU General Public License and 26 the GNU Lesser General Public License along with this program. If 27 not, see <http://www.gnu.org/licenses/>. */ 28 29 #ifdef HAVE_CONFIG_H 30 # include <config.h> 31 #endif 32 33 #include <dwarf.h> 34 35 #define BACKEND aarch64_ 36 #include "libebl_CPU.h" 37 38 39 /* ABI-specified state of DWARF CFI based on: 40 41 "DWARF for the ARM 64 bit architecture (AArch64) 1.0" 42 http://infocenter.arm.com/help/topic/com.arm.doc.ihi0057b/IHI0057B_aadwarf64.pdf 43 44 "Procedure Call Standard for the ARM 64 bit Architecture 1.0" 45 http://infocenter.arm.com/help/topic/com.arm.doc.ihi0055b/IHI0055B_aapcs64.pdf 46 */ 47 48 int 49 aarch64_abi_cfi (Ebl *ebl __attribute__ ((unused)), Dwarf_CIE *abi_info) 50 { 51 static const uint8_t abi_cfi[] = 52 { 53 /* The initial Canonical Frame Address is the value of the 54 Stack Pointer (r31) as setup in the previous frame. */ 55 DW_CFA_def_cfa, ULEB128_7 (30), ULEB128_7 (0), 56 57 #define SV(n) DW_CFA_same_value, ULEB128_7 (n) 58 /* Callee-saved regs r19-r28. */ 59 SV (19), SV (20), SV (21), SV (22), SV (23), 60 SV (24), SV (25), SV (26), SV (27), SV (28), 61 62 /* The Frame Pointer (FP, r29) and Link Register (LR, r30). */ 63 SV (29), SV (30), 64 65 /* The Stack Pointer (r31) is restored from CFA address by default. */ 66 DW_CFA_val_offset, ULEB128_7 (31), ULEB128_7 (0), 67 68 /* Callee-saved fpregs v8-v15. v0 == 64. */ 69 SV (72), SV (73), SV (74), SV (75), 70 SV (76), SV (77), SV (78), SV (79), 71 #undef SV 72 73 /* XXX Note: registers intentionally unused by the program, 74 for example as a consequence of the procedure call standard 75 should be initialized as if by DW_CFA_same_value. */ 76 }; 77 78 abi_info->initial_instructions = abi_cfi; 79 abi_info->initial_instructions_end = &abi_cfi[sizeof abi_cfi]; 80 abi_info->data_alignment_factor = -4; 81 82 abi_info->return_address_register = 30; /* lr. */ 83 84 return 0; 85 } 86
