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- /* Target-dependent header for the Nios II architecture, for GDB.
- Copyright (C) 2012-2022 Free Software Foundation, Inc.
- Contributed by Mentor Graphics, Inc.
- This file is part of GDB.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
- #ifndef NIOS2_TDEP_H
- #define NIOS2_TDEP_H
- #include "gdbarch.h"
- /* Nios II ISA specific encodings and macros. */
- #include "opcode/nios2.h"
- /* Registers. */
- #define NIOS2_Z_REGNUM 0 /* Zero */
- #define NIOS2_R2_REGNUM 2 /* used for return value */
- #define NIOS2_R3_REGNUM 3 /* used for return value */
- /* Used for hidden zero argument to store ptr to struct return value. */
- #define NIOS2_R4_REGNUM 4
- #define NIOS2_R7_REGNUM 7
- #define NIOS2_GP_REGNUM 26 /* Global Pointer */
- #define NIOS2_SP_REGNUM 27 /* Stack Pointer */
- #define NIOS2_FP_REGNUM 28 /* Frame Pointer */
- #define NIOS2_EA_REGNUM 29 /* Exception address */
- #define NIOS2_BA_REGNUM 30 /* Breakpoint return address */
- #define NIOS2_RA_REGNUM 31 /* Return address */
- #define NIOS2_PC_REGNUM 32
- /* Control registers. */
- #define NIOS2_STATUS_REGNUM 33
- #define NIOS2_ESTATUS_REGNUM 34
- #define NIOS2_BSTATUS_REGNUM 35
- #define NIOS2_IENABLE_REGNUM 36
- #define NIOS2_IPENDING_REGNUM 37
- #define NIOS2_CPUID_REGNUM 38
- #define NIOS2_EXCEPTION_REGNUM 40
- #define NIOS2_PTEADDR_REGNUM 41
- #define NIOS2_TLBACC_REGNUM 42
- #define NIOS2_TLBMISC_REGNUM 43
- #define NIOS2_ECCINJ_REGNUM 44
- #define NIOS2_BADADDR_REGNUM 45
- #define NIOS2_CONFIG_REGNUM 46
- #define NIOS2_MPUBASE_REGNUM 47
- #define NIOS2_MPUACC_REGNUM 48
- /* R4-R7 are used for argument passing. */
- #define NIOS2_FIRST_ARGREG NIOS2_R4_REGNUM
- #define NIOS2_LAST_ARGREG NIOS2_R7_REGNUM
- /* Number of all registers. */
- #define NIOS2_NUM_REGS 49
- /* Size of an instruction, in bytes. */
- #define NIOS2_OPCODE_SIZE 4
- #define NIOS2_CDX_OPCODE_SIZE 2
- /* Target-dependent structure in gdbarch. */
- struct nios2_gdbarch_tdep : gdbarch_tdep
- {
- /* Assumes FRAME is stopped at a syscall (trap) instruction; returns
- the expected next PC. */
- CORE_ADDR (*syscall_next_pc) (struct frame_info *frame,
- const struct nios2_opcode *op) = nullptr;
- /* Returns true if PC points to a kernel helper function. */
- bool (*is_kernel_helper) (CORE_ADDR pc) = nullptr;
- /* Offset to PC value in jump buffer.
- If this is negative, longjmp support will be disabled. */
- int jb_pc = 0;
- };
- extern struct target_desc *tdesc_nios2_linux;
- extern struct target_desc *tdesc_nios2;
- #endif /* NIOS2_TDEP_H */
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