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/* $NetBSD: db_machdep.h,v 1.8 2023/06/12 19:04:14 skrll Exp $ */
/*-
* Copyright (c) 2014 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Matt Thomas of 3am Software Foundry.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _RISCV_DB_MACHDEP_H_
#define _RISCV_DB_MACHDEP_H_
#include <riscv/locore.h> /* T_BREAK */
#include <riscv/frame.h>
#define DB_ELF_SYMBOLS
typedef vaddr_t db_addr_t; /* address - unsigned */
#define DDB_EXPR_FMT "l" /* expression is long */
typedef long db_expr_t; /* expression - signed */
typedef struct trapframe db_regs_t;
extern const uint32_t cpu_Debugger_insn[];
extern const uint32_t cpu_Debugger_ret[];
extern db_regs_t ddb_regs;
#define DDB_REGS (&ddb_regs)
#define PC_REGS(tf) ((tf)->tf_pc)
#define PC_ADVANCE(tf) do { \
if (db_get_value((tf)->tf_pc, sizeof(uint32_t), false) == BKPT_INST) \
(tf)->tf_pc += BKPT_SIZE; \
} while(0)
/* Similar to PC_ADVANCE(), except only advance on cpu_Debugger()'s bpt */
#define PC_BREAK_ADVANCE(tf) do { \
if ((tf)->tf_pc == (register_t)cpu_Debugger_insn) \
(tf)->tf_pc = (register_t)cpu_Debugger_ret; \
} while(0)
#define BKPT_ADDR(addr) (addr) /* breakpoint address */
#define BKPT_INST 0x00100073
#define BKPT_SIZE (sizeof(uint32_t)) /* size of bkpt inst */
#define BKPT_SET(inst, addr) (BKPT_INST)
/*
* XXX with the C extension there's also a 16-bit-wide breakpoint
* instruction, the idea being that you use it when inserting a
* breakpoint into a stream of 16-bit instructions, but it looks like
* MI ddb can't cope with having two sizes :-(
*/
#if 0
#define BKPT_INST_2 0x9002
#define BKPT_SIZE_2 (sizeof(uint16_t))
#endif
#define IS_BREAKPOINT_TRAP(type, code) ((type) == CAUSE_BREAKPOINT)
#define IS_WATCHPOINT_TRAP(type, code) (0)
/*
* Interface to disassembly
*/
db_addr_t db_disasm_insn(uint32_t, db_addr_t, bool);
/*
* Entrypoints to DDB for kernel, keyboard drivers, init hook
*/
void kdb_kbd_trap(db_regs_t *);
int kdb_trap(int, db_regs_t *);
static inline void
db_set_ddb_regs(int type, struct trapframe *tf)
{
*curcpu()->ci_ddb_regs = *tf;
}
/*
* Constants for KGDB.
*/
typedef register_t kgdb_reg_t;
#define KGDB_NUMREGS 90
#define KGDB_BUFLEN 1024
/*
* RISCV cpus have no hardware single-step.
*/
#define SOFTWARE_SSTEP
#define inst_trap_return(ins) ((ins)&0)
bool inst_branch(uint32_t inst);
bool inst_call(uint32_t inst);
bool inst_return(uint32_t inst);
bool inst_load(uint32_t inst);
bool inst_store(uint32_t inst);
bool inst_unconditional_flow_transfer(uint32_t inst);
db_addr_t branch_taken(uint32_t inst, db_addr_t pc, db_regs_t *regs);
db_addr_t next_instr_address(db_addr_t pc, bool bd);
bool ddb_running_on_this_cpu_p(void);
bool ddb_running_on_any_cpu_p(void);
void db_resume_others(void);
#if 0
/*
* We have machine-dependent commands.
*/
#define DB_MACHINE_COMMANDS
#endif
void dump_trapframe(const struct trapframe *, void (*)(const char *, ...) __printflike(1, 2));
#endif /* _RISCV_DB_MACHDEP_H_ */
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