125 lines
3.8 KiB
C
125 lines
3.8 KiB
C
/* $NetBSD: db_machdep.h,v 1.1 2014/09/19 17:36:26 matt Exp $ */
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/*-
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* Copyright (c) 2014 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matt Thomas of 3am Software Foundry.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _RISCV_DB_MACHDEP_H_
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#define _RISCV_DB_MACHDEP_H_
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#include <riscv/locore.h> /* T_BREAK */
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#define DB_ELF_SYMBOLS
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#ifndef DB_ELFSIZE
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#define DB_ELFSIZE 32
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#endif
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typedef vaddr_t db_addr_t; /* address - unsigned */
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#define DDB_EXPR_FMT "l" /* expression is long */
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typedef long db_expr_t; /* expression - signed */
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typedef struct trapframe db_regs_t;
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extern const uint32_t __cpu_Debugger_insn[1];
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#define DDB_REGS (curcpu()->ci_ddb_regs)
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#define PC_REGS(tf) ((tf)->tf_pc)
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#define PC_ADVANCE(tf) do { \
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if (db_get_value((tf)->tf_pc, sizeof(uint32_t), false) == BKPT_INST) \
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(tf)->tf_pc += BKPT_SIZE; \
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} while(0)
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/* Similar to PC_ADVANCE(), except only advance on cpu_Debugger()'s bpt */
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#define PC_BREAK_ADVANCE(tf) do { \
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if ((tf)->tf_pc == (register_t) __cpu_Debugger_insn) \
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(tf)->tf_pc += BKPT_SIZE; \
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} while(0)
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#define BKPT_ADDR(addr) (addr) /* breakpoint address */
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#define BKPT_INST 0x00100073
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#define BKPT_SIZE (sizeof(uint32_t)) /* size of breakpoint inst */
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#define BKPT_SET(inst, addr) (BKPT_INST)
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#define IS_BREAKPOINT_TRAP(type, code) ((type) == CAUSE_BREAKPOINT)
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#define IS_WATCHPOINT_TRAP(type, code) (0)
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/*
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* Interface to disassembly
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*/
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db_addr_t db_disasm_insn(uint32_t insn, db_addr_t loc, bool altfmt);
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/*
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* Entrypoints to DDB for kernel, keyboard drivers, init hook
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*/
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void kdb_kbd_trap(db_regs_t *);
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int kdb_trap(int type, struct trapframe *);
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static inline void
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db_set_ddb_regs(int type, struct trapframe *tf)
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{
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*curcpu()->ci_ddb_regs = *tf;
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}
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/*
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* Constants for KGDB.
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*/
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typedef register_t kgdb_reg_t;
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#define KGDB_NUMREGS 90
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#define KGDB_BUFLEN 1024
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/*
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* RISCV cpus have no hardware single-step.
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*/
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#define SOFTWARE_SSTEP
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#define inst_trap_return(ins) ((ins)&0)
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bool inst_branch(uint32_t inst);
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bool inst_call(uint32_t inst);
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bool inst_return(uint32_t inst);
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bool inst_load(uint32_t inst);
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bool inst_store(uint32_t inst);
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bool inst_unconditional_flow_transfer(uint32_t inst);
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db_addr_t branch_taken(uint32_t inst, db_addr_t pc, db_regs_t *regs);
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db_addr_t next_instr_address(db_addr_t pc, bool bd);
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bool ddb_running_on_this_cpu_p(void);
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bool ddb_running_on_any_cpu_p(void);
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void db_resume_others(void);
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#if 0
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/*
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* We have machine-dependent commands.
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*/
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#define DB_MACHINE_COMMANDS
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#endif
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#endif /* _RISCV_DB_MACHDEP_H_ */
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