116a6f8233
Add ddb support for QED opcodes, fill in enough routines so "next" usually works, kdbpoke support for any size. Add callback that ports can hook when entering and leaving ddb. This can be used for things like turning off watchdogs while in ddb.
122 lines
4.2 KiB
C
122 lines
4.2 KiB
C
/* $NetBSD: db_machdep.h,v 1.10 2000/07/17 07:04:19 jeffs 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 <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/proc.h> /* register state */
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typedef vaddr_t db_addr_t; /* address - unsigned */
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typedef long db_expr_t; /* expression - signed */
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typedef struct frame db_regs_t;
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db_regs_t ddb_regs; /* register state */
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#define DDB_REGS (&ddb_regs)
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#define PC_REGS(regs) ((db_addr_t)(regs)->f_regs[PC])
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#define PC_ADVANCE(regs) do { \
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if ((db_get_value((regs)->f_regs[PC], sizeof(int), FALSE) & \
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0xfc00003f) == 0xd) \
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(regs)->f_regs[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)->f_regs[PC], sizeof(int), FALSE) == 0xd) \
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(regs)->f_regs[PC] += BKPT_SIZE; \
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} while(0)
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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) (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 __P((int insn, db_addr_t loc, boolean_t 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 __P((db_regs_t *));
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void db_set_ddb_regs __P((int type, mips_reg_t *));
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int kdb_trap __P((int type, mips_reg_t *));
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void db_machine_init __P((void));
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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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boolean_t inst_branch __P((int inst));
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boolean_t inst_call __P((int inst));
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boolean_t inst_return __P((int inst));
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boolean_t inst_load __P((int inst));
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boolean_t inst_store __P((int inst));
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boolean_t inst_unconditional_flow_transfer __P((int inst));
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db_addr_t branch_taken __P((int inst, db_addr_t pc, db_regs_t *regs));
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db_addr_t next_instr_address __P((db_addr_t pc, boolean_t bd));
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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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/*
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* Hook to MIPS platform code to allow management of kernel breakpoints.
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*/
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extern void (*db_mach_break_hook)(int);
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#endif /* _MIPS_DB_MACHDEP_H_ */
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