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

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 * Copyright (c) 2015-2016 Ruslan Bukin <[email protected]>

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 * All rights reserved.

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 *

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 * Portions of this software were developed by SRI International and the

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 * University of Cambridge Computer Laboratory under DARPA/AFRL contract

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 * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.

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 *

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 * Portions of this software were developed by the University of Cambridge

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 * Computer Laboratory as part of the CTSRD Project, with support from the

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 * UK Higher Education Innovation Fund (HEIF).

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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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 * 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_DB_MACHDEP_H_

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#define	_MACHINE_DB_MACHDEP_H_

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#include <machine/riscvreg.h>

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#include <machine/frame.h>

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#include <machine/trap.h>

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#define	T_BREAKPOINT	(SCAUSE_BREAKPOINT)

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#define	T_WATCHPOINT	(0)

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typedef vm_offset_t	db_addr_t;

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typedef long		db_expr_t;

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#define	PC_REGS()	((db_addr_t)kdb_frame->tf_sepc)

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#define	BKPT_INST	(0x00100073)

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#define	BKPT_SIZE	(INSN_SIZE)

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#define	BKPT_SET(inst)	(BKPT_INST)

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#define	BKPT_SKIP do {							\

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	uint32_t _instr;						\

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									\

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	_instr = db_get_value(PC_REGS(), sizeof(uint32_t), FALSE);	\

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	if ((_instr & 0x3) == 0x3)					\

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		kdb_frame->tf_sepc += 4;	/* ebreak */		\

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	else								\

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		kdb_frame->tf_sepc += 2;	/* c.ebreak */		\

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} while (0)

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#define	db_clear_single_step	kdb_cpu_clear_singlestep

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#define	db_set_single_step	kdb_cpu_set_singlestep

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#define	IS_BREAKPOINT_TRAP(type, code)	(type == T_BREAKPOINT)

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#define	IS_WATCHPOINT_TRAP(type, code)	(type == T_WATCHPOINT)

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#define	inst_trap_return(ins)	(ins == 0x10000073)	/* eret */

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#define	inst_return(ins)	(ins == 0x00008067)	/* ret */

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#define	inst_call(ins)		(((ins) & 0x7f) == 111 || \

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				 ((ins) & 0x7f) == 103) /* jal, jalr */

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#define	inst_load(ins) ({							\

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	uint32_t tmp_instr = db_get_value(PC_REGS(), sizeof(uint32_t), FALSE);	\

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	is_load_instr(tmp_instr);						\

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})

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#define	inst_store(ins) ({							\

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	uint32_t tmp_instr = db_get_value(PC_REGS(), sizeof(uint32_t), FALSE);	\

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	is_store_instr(tmp_instr);						\

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})

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#define	is_load_instr(ins)	(((ins) & 0x7f) == 3)

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#define	is_store_instr(ins)	(((ins) & 0x7f) == 35)

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#define	next_instr_address(pc, bd)	((bd) ? (pc) : ((pc) + 4))

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#define	DB_ELFSIZE		64

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#endif /* !_MACHINE_DB_MACHDEP_H_ */

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