1 /* RISC-V ABI-specified defaults for DWARF CFI. 2 This file is part of elfutils. 3 4 This file is free software; you can redistribute it and/or modify 5 it under the terms of either 6 7 * the GNU Lesser General Public License as published by the Free 8 Software Foundation; either version 3 of the License, or (at 9 your option) any later version 10 11 or 12 13 * the GNU General Public License as published by the Free 14 Software Foundation; either version 2 of the License, or (at 15 your option) any later version 16 17 or both in parallel, as here. 18 19 elfutils is distributed in the hope that it will be useful, but 20 WITHOUT ANY WARRANTY; without even the implied warranty of 21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 22 General Public License for more details. 23 24 You should have received copies of the GNU General Public License and 25 the GNU Lesser General Public License along with this program. If 26 not, see <http://www.gnu.org/licenses/>. */ 27 28 #ifdef HAVE_CONFIG_H 29 # include <config.h> 30 #endif 31 32 #include <dwarf.h> 33 34 #define BACKEND aarch64_ 35 #include "libebl_CPU.h" 36 37 38 int 39 riscv_abi_cfi (Ebl *ebl __attribute__ ((unused)), Dwarf_CIE *abi_info) 40 { 41 static const uint8_t abi_cfi[] = 42 { 43 /* The initial Canonical Frame Address is the value of the 44 Stack Pointer (r2) as setup in the previous frame. */ 45 DW_CFA_def_cfa, ULEB128_7 (2), ULEB128_7 (0), 46 47 /* The Stack Pointer (r2) is restored from CFA address by default. */ 48 DW_CFA_val_offset, ULEB128_7 (2), ULEB128_7 (0), 49 50 #define SV(n) DW_CFA_same_value, ULEB128_7 (n) 51 /* The return address register contains the return address setup by 52 caller. */ 53 SV (1), 54 55 /* Callee-saved registers s0-s11, fs0-fs11. */ 56 SV(8), SV (9), SV (18), SV (19), SV (20), SV (21), 57 SV (22), SV (23), SV (24), SV (25), SV (26), SV (27), 58 59 SV (40), SV (41), SV (50), SV (51), SV (52), SV (53), 60 SV (54), SV (55), SV (56), SV (57), SV (58), SV (59), 61 #undef SV 62 63 /* XXX Note: registers intentionally unused by the program, 64 for example as a consequence of the procedure call standard 65 should be initialized as if by DW_CFA_same_value. */ 66 }; 67 68 abi_info->initial_instructions = abi_cfi; 69 abi_info->initial_instructions_end = &abi_cfi[sizeof abi_cfi]; 70 abi_info->data_alignment_factor = -4; 71 72 abi_info->return_address_register = 1; /* ra. */ 73 74 return 0; 75 } 76
