1 /* ppc ABI-specified defaults for DWARF CFI. 2 Copyright (C) 2012, 2013 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 ppc_ 36 #include "libebl_CPU.h" 37 38 int 39 ppc_abi_cfi (Ebl *ebl __attribute__ ((unused)), Dwarf_CIE *abi_info) 40 { 41 static const uint8_t abi_cfi[] = 42 { 43 /* This instruction is provided in every CIE. It is not repeated here: 44 DW_CFA_def_cfa, ULEB128_7 (1), ULEB128_7 (0) */ 45 /* r1 is assumed to be restored from cfa adress, 46 r1 acts as a stack frame pointer. */ 47 DW_CFA_val_offset, ULEB128_7 (1), ULEB128_7 (0), 48 /* lr is not callee-saved but it needs to be preserved as it is pre-set 49 by the caller. */ 50 DW_CFA_same_value, ULEB128_7 (65), /* lr */ 51 52 /* Callee-saved regs. */ 53 #define SV(n) DW_CFA_same_value, ULEB128_7 (n) 54 SV (2), /* r2 is TOC pointer. */ 55 SV (13), /* Reserved as system thread id (is it for CFI?). */ 56 /* r14-r31 are non-volatile registers. */ 57 SV (14), SV (15), SV (16), SV (17), SV (18), SV (19), SV (20), SV (21), 58 SV (22), SV (23), SV (24), SV (25), SV (26), SV (27), SV (28), SV (29), 59 SV (30), SV (31) 60 /* VMX registers v20-v31 and vrsave are non-volatile but they are 61 assigned DWARF registers 1144-1156 (v20-v31) which is outside of the 62 CFI supported range. */ 63 #undef SV 64 }; 65 66 abi_info->initial_instructions = abi_cfi; 67 abi_info->initial_instructions_end = &abi_cfi[sizeof abi_cfi]; 68 abi_info->data_alignment_factor = ebl->class == ELFCLASS64 ? 8 : 4; 69 70 abi_info->return_address_register = 65; 71 72 return 0; 73 } 74 75 __typeof (ppc_abi_cfi) 76 ppc64_abi_cfi 77 __attribute__ ((alias ("ppc_abi_cfi"))); 78
