1 /* Target-dependent header for the Nios II architecture, for GDB. 2 Copyright (C) 2012-2015 Free Software Foundation, Inc. 3 Contributed by Mentor Graphics, Inc. 4 5 This file is part of GDB. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 19 20 #ifndef NIOS2_TDEP_H 21 #define NIOS2_TDEP_H 22 23 /* Registers. */ 24 #define NIOS2_Z_REGNUM 0 /* Zero */ 25 #define NIOS2_R2_REGNUM 2 /* used for return value */ 26 #define NIOS2_R3_REGNUM 3 /* used for return value */ 27 /* Used for hidden zero argument to store ptr to struct return value. */ 28 #define NIOS2_R4_REGNUM 4 29 #define NIOS2_R7_REGNUM 7 30 #define NIOS2_GP_REGNUM 26 /* Global Pointer */ 31 #define NIOS2_SP_REGNUM 27 /* Stack Pointer */ 32 #define NIOS2_FP_REGNUM 28 /* Frame Pointer */ 33 #define NIOS2_EA_REGNUM 29 /* Exception address */ 34 #define NIOS2_BA_REGNUM 30 /* Breakpoint return address */ 35 #define NIOS2_RA_REGNUM 31 /* Return address */ 36 #define NIOS2_PC_REGNUM 32 37 38 /* Control registers. */ 39 #define NIOS2_STATUS_REGNUM 33 40 #define NIOS2_ESTATUS_REGNUM 34 41 #define NIOS2_BSTATUS_REGNUM 35 42 #define NIOS2_IENABLE_REGNUM 36 43 #define NIOS2_IPENDING_REGNUM 37 44 #define NIOS2_CPUID_REGNUM 38 45 #define NIOS2_EXCEPTION_REGNUM 40 46 #define NIOS2_PTEADDR_REGNUM 41 47 #define NIOS2_TLBACC_REGNUM 42 48 #define NIOS2_TLBMISC_REGNUM 43 49 #define NIOS2_ECCINJ_REGNUM 44 50 #define NIOS2_BADADDR_REGNUM 45 51 #define NIOS2_CONFIG_REGNUM 46 52 #define NIOS2_MPUBASE_REGNUM 47 53 #define NIOS2_MPUACC_REGNUM 48 54 55 /* R4-R7 are used for argument passing. */ 56 #define NIOS2_FIRST_ARGREG NIOS2_R4_REGNUM 57 #define NIOS2_LAST_ARGREG NIOS2_R7_REGNUM 58 59 /* Number of all registers. */ 60 #define NIOS2_NUM_REGS 49 61 62 /* Size of an instruction, in bytes. */ 63 #define NIOS2_OPCODE_SIZE 4 64 65 /* Target-dependent structure in gdbarch. */ 66 struct gdbarch_tdep 67 { 68 /* Assumes FRAME is stopped at a syscall (trap) instruction; returns 69 the expected next PC. */ 70 CORE_ADDR (*syscall_next_pc) (struct frame_info *frame); 71 72 /* Offset to PC value in jump buffer. 73 If this is negative, longjmp support will be disabled. */ 74 int jb_pc; 75 }; 76 77 extern struct target_desc *tdesc_nios2_linux; 78 extern struct target_desc *tdesc_nios2; 79 80 #endif /* NIOS2_TDEP_H */ 81