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      1 /*	$NetBSD: db_machdep.h,v 1.30 2023/10/26 10:41:03 andvar Exp $ */
      2 
      3 /*
      4  * Mach Operating System
      5  * Copyright (c) 1991,1990 Carnegie Mellon University
      6  * All Rights Reserved.
      7  *
      8  * Permission to use, copy, modify and distribute this software and its
      9  * documentation is hereby granted, provided that both the copyright
     10  * notice and this permission notice appear in all copies of the
     11  * software, derivative works or modified versions, and any portions
     12  * thereof, and that both notices appear in supporting documentation.
     13  *
     14  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     15  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
     16  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     17  *
     18  * Carnegie Mellon requests users of this software to return to
     19  *
     20  *  Software Distribution Coordinator  or  Software.Distribution (at) CS.CMU.EDU
     21  *  School of Computer Science
     22  *  Carnegie Mellon University
     23  *  Pittsburgh PA 15213-3890
     24  *
     25  * any improvements or extensions that they make and grant Carnegie Mellon
     26  * the rights to redistribute these changes.
     27  */
     28 
     29 #ifndef	_SPARC_DB_MACHDEP_H_
     30 #define	_SPARC_DB_MACHDEP_H_
     31 
     32 /*
     33  * Machine-dependent defines for new kernel debugger.
     34  */
     35 #include <sys/types.h>
     36 
     37 #include <uvm/uvm_extern.h>
     38 
     39 #include <machine/frame.h>
     40 #include <machine/pcb.h>
     41 #include <machine/psl.h>
     42 #include <machine/trap.h>
     43 #include <machine/reg.h>
     44 
     45 typedef	vaddr_t		db_addr_t;	/* address - unsigned */
     46 #define	DDB_EXPR_FMT	"l"		/* expression is long */
     47 typedef	long		db_expr_t;	/* expression - signed */
     48 
     49 typedef struct {
     50 	struct trapframe db_tf;
     51 	struct frame	 db_fr;
     52 } db_regs_t;
     53 
     54 /* Current CPU register state */
     55 extern struct cpu_info *ddb_cpuinfo;
     56 extern db_regs_t	*ddb_regp;
     57 #define DDB_REGS        ddb_regp
     58 #define	DDB_TF		(&ddb_regp->db_tf)
     59 #define	DDB_FR		(&ddb_regp->db_fr)
     60 
     61 #define	PC_REGS(regs)	((regs)->db_tf.tf_pc)
     62 #define	PC_ADVANCE(regs) do {				\
     63 	int n = (regs)->db_tf.tf_npc;			\
     64 	(regs)->db_tf.tf_pc = n;			\
     65 	(regs)->db_tf.tf_npc = n + 4;			\
     66 } while(0)
     67 
     68 #define	BKPT_ADDR(addr)	(addr)		/* breakpoint address */
     69 #define	BKPT_INST	0x91d02001	/* breakpoint instruction */
     70 #define	BKPT_SIZE	(4)		/* size of breakpoint inst */
     71 #define	BKPT_SET(inst, addr)	(BKPT_INST)
     72 
     73 #define	IS_BREAKPOINT_TRAP(type, code)	\
     74 	((type) == T_BREAKPOINT || (type) == T_KGDB_EXEC)
     75 #define IS_WATCHPOINT_TRAP(type, code)	(0)
     76 
     77 /*
     78  * Sparc cpus have no hardware single-step.
     79  */
     80 #define SOFTWARE_SSTEP
     81 
     82 bool		db_inst_trap_return(int inst);
     83 bool		db_inst_return(int inst);
     84 bool		db_inst_call(int inst);
     85 bool		db_inst_branch(int inst);
     86 int		db_inst_load(int inst);
     87 int		db_inst_store(int inst);
     88 bool		db_inst_unconditional_flow_transfer(int inst);
     89 db_addr_t	db_branch_taken(int inst, db_addr_t pc, db_regs_t *regs);
     90 
     91 void		ddb_suspend(struct trapframe *);
     92 
     93 #define inst_trap_return(ins)	db_inst_trap_return(ins)
     94 #define inst_return(ins)	db_inst_return(ins)
     95 #define inst_call(ins)		db_inst_call(ins)
     96 #define inst_branch(ins)	db_inst_branch(ins)
     97 #define inst_load(ins)		db_inst_load(ins)
     98 #define inst_store(ins)		db_inst_store(ins)
     99 #define	inst_unconditional_flow_transfer(ins) \
    100 				db_inst_unconditional_flow_transfer(ins)
    101 #define branch_taken(ins, pc, regs) \
    102 				db_branch_taken((ins), (pc), (regs))
    103 
    104 /* see note in db_interface.c about reversed breakpoint addrs */
    105 #define next_instr_address(pc, bd) \
    106 	((bd) ? (pc) : ddb_regp->db_tf.tf_npc)
    107 
    108 
    109 
    110 #define DB_MACHINE_COMMANDS
    111 
    112 int kdb_trap(int, struct trapframe *);
    113 
    114 /*
    115  * We use elf symbols in DDB.
    116  */
    117 #define	DB_ELF_SYMBOLS
    118 
    119 
    120 /*
    121  * KGDB definitions
    122  */
    123 typedef u_long		kgdb_reg_t;
    124 #define KGDB_NUMREGS	72
    125 #define KGDB_BUFLEN	1024
    126 
    127 #endif	/* _SPARC_DB_MACHDEP_H_ */
    128