156 lines
4.8 KiB
C
156 lines
4.8 KiB
C
/* $NetBSD: db_machdep.h,v 1.38 2021/05/18 06:38:24 skrll Exp $ */
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/*
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* Copyright (c) 1997 Jonathan Stone (hereinafter referred to as the author)
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* All rights reserved.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Jonathan Stone for
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* the NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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 _MIPS_DB_MACHDEP_H_
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#define _MIPS_DB_MACHDEP_H_
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#include <sys/types.h>
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#include <sys/stdbool.h>
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#include <uvm/uvm_param.h> /* XXX boolean_t */
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#include <mips/trap.h> /* T_BREAK */
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#include <mips/reg.h> /* register state */
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#include <mips/regnum.h> /* symbolic register indices */
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#include <mips/pcb.h>
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#define DB_ELF_SYMBOLS
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typedef vaddr_t db_addr_t; /* address - unsigned */
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#ifdef __mips_n32
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#define DDB_EXPR_FMT "ll" /* expression is long long */
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typedef int64_t db_expr_t; /* expression - signed */
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#else
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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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#endif
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typedef struct reg db_regs_t;
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extern db_regs_t ddb_regs; /* register state */
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#define DDB_REGS (&ddb_regs)
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#define PC_REGS(regs) ((regs)->r_regs[_R_PC])
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#define PC_ADVANCE(regs) do { \
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if ((db_get_value((regs)->r_regs[_R_PC], sizeof(int), false) &\
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0xfc00003f) == 0xd) \
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(regs)->r_regs[_R_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(regs) do { \
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if (db_get_value((regs)->r_regs[_R_PC], sizeof(int), false) == 0xd) \
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(regs)->r_regs[_R_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 0x0001000D
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#define BKPT_SIZE (4) /* 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) == T_BREAK)
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#define IS_WATCHPOINT_TRAP(type, code) (0) /* XXX mips3 watchpoint */
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/*
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* Interface to disassembly (shared with mdb)
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*/
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db_addr_t db_disasm_insn(int 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, struct reg *);
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static inline void
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db_set_ddb_regs(int type, struct reg *regs)
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{
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ddb_regs = *regs;
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}
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/*
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* Helper functions for fetching 32-bit and 64-bit kernel memory.
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*/
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bool kdbpeek(vaddr_t, unsigned *);
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mips_reg_t kdbrpeek(vaddr_t, size_t);
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/*
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* Constants for KGDB.
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*/
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typedef mips_reg_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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* MIPS 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(int inst);
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bool inst_call(int inst);
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bool inst_return(int inst);
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bool inst_load(int inst);
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bool inst_store(int inst);
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bool inst_unconditional_flow_transfer(int inst);
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db_addr_t branch_taken(int 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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void db_mips_stack_trace(void *, void *, void (*pr)(const char *, ...));
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#ifdef _KERNEL
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/*
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* Optional function to perform machine- or cpu-specific reset.
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* Called from ddb "machine reset".
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*/
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extern void (*cpu_reset_address)(void);
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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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#define db_stacktrace_print(prfunc) \
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db_mips_stack_trace(__builtin_return_address(0), \
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__builtin_frame_address(0), prfunc)
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#endif /* _MIPS_DB_MACHDEP_H_ */
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