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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/riscv/include/gdb_machdep.h
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/*-

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 * SPDX-License-Identifier: BSD-2-Clause

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 *

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 * Copyright (c) 2021 Mitchell Horne <[email protected]>

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 *

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 * Redistribution and use in source and binary forms, with or without

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 * modification, are permitted provided that the following conditions

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 * are met:

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 *

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 * 1. Redistributions of source code must retain the above copyright

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 *    notice, this list of conditions and the following disclaimer.

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 * 2. Redistributions in binary form must reproduce the above copyright

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 *    notice, this list of conditions and the following disclaimer in the

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 *    documentation and/or other materials provided with the distribution.

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 *

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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

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 * SUCH DAMAGE.

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 */

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#ifndef _MACHINE_GDB_MACHDEP_H_

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#define	_MACHINE_GDB_MACHDEP_H_

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#define	GDB_BUFSZ		4096

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#define	GDB_NREGS		33

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#define	GDB_REG_ZERO		0

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#define	GDB_REG_RA		1

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#define	GDB_REG_SP		2

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#define	GDB_REG_GP		3

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#define	GDB_REG_TP		4

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#define	GDB_REG_T0		5

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#define	GDB_REG_FP		8

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#define	GDB_REG_S1		9

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#define	GDB_REG_A0		10

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#define	GDB_REG_S2		18

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#define	GDB_REG_T3		28

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#define	GDB_REG_PC		32

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#define	GDB_REG_CSR_BASE	65

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#define	GDB_REG_SSTATUS		(GDB_REG_CSR_BASE + 0x100)

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#define	GDB_REG_SCAUSE		(GDB_REG_CSR_BASE + 0x142)

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#define	GDB_REG_STVAL		(GDB_REG_CSR_BASE + 0x143)

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_Static_assert(GDB_BUFSZ >= (GDB_NREGS * 8), "buffer fits 'g' regs");

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static __inline size_t

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gdb_cpu_regsz(int regnum __unused)

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{

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	return (8);

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}

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static __inline int

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gdb_cpu_query(void)

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{

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	return (0);

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}

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static __inline void *

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gdb_begin_write(void)

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{

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	return (NULL);

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}

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static __inline void

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gdb_end_write(void *arg __unused)

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{

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}

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static __inline void

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gdb_cpu_stop_reason(int type __unused, int code __unused)

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{

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}

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void	*gdb_cpu_getreg(int, size_t *);

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void	 gdb_cpu_setreg(int, void *);

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int	 gdb_cpu_signal(int, int);

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#endif /* !_MACHINE_GDB_MACHDEP_H_ */

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