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      1 /*	$NetBSD: db_machdep.h,v 1.36 2020/03/10 15:54:52 christos 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	_SPARC64_DB_MACHDEP_H_
     30 #define	_SPARC64_DB_MACHDEP_H_
     31 
     32 /*
     33  * Machine-dependent defines for new kernel debugger.
     34  */
     35 
     36 #include <sys/types.h>
     37 
     38 #include <uvm/uvm_extern.h>
     39 
     40 #include <machine/frame.h>
     41 #include <machine/pcb.h>
     42 #include <machine/psl.h>
     43 #include <machine/trap.h>
     44 #include <machine/reg.h>
     45 
     46 
     47 /* use 64-bit types explicitly for 32-bit kernels */
     48 typedef	vaddr_t		db_addr_t;	/* address - unsigned */
     49 #ifdef __arch64__
     50 #define	DDB_EXPR_FMT	"l"		/* expression is int64_t (long) */
     51 #else
     52 #define	DDB_EXPR_FMT	"ll"		/* expression is int64_t (long long) */
     53 #endif
     54 typedef	int64_t		db_expr_t;	/* expression - signed */
     55 
     56 struct trapstate {
     57 	int64_t tstate;
     58 	int64_t tpc;
     59 	int64_t	tnpc;
     60 	int64_t	tt;
     61 };
     62 
     63 typedef struct {
     64 	struct trapframe64	db_tf;
     65 	struct frame64		db_fr;
     66 	struct trapstate	db_ts[5];
     67 	int			db_tl;
     68 	struct fpstate64	db_fpstate __aligned(SPARC64_BLOCK_SIZE);
     69 } db_regs_t;
     70 
     71 /* Current CPU register state */
     72 #ifdef _KERNEL
     73 #define	DDB_REGS	((db_regs_t*)__UNVOLATILE(curcpu()->ci_ddb_regs))
     74 #define	DDB_TF		(&DDB_REGS->db_tf)
     75 #define	DDB_FP		(&DDB_REGS->db_fpstate)
     76 #endif
     77 
     78 /* DDB commands not in db_interface.c */
     79 void	db_dump_ts(db_expr_t, bool, db_expr_t, const char *);
     80 void	db_dump_trap(db_expr_t, bool, db_expr_t, const char *);
     81 void	db_dump_fpstate(db_expr_t, bool, db_expr_t, const char *);
     82 void	db_dump_window(db_expr_t, bool, db_expr_t, const char *);
     83 void	db_dump_stack(db_expr_t, bool, db_expr_t, const char *);
     84 
     85 #define	PC_REGS(regs)	((regs)->db_tf.tf_pc)
     86 #define	PC_ADVANCE(regs) do {				\
     87 	vaddr_t n = (regs)->db_tf.tf_npc;		\
     88 	(regs)->db_tf.tf_pc = n;			\
     89 	(regs)->db_tf.tf_npc = n + 4;			\
     90 } while(0)
     91 
     92 #define	BKPT_ADDR(addr)	(addr)		/* breakpoint address */
     93 #define	BKPT_INST	0x91d02001	/* breakpoint instruction */
     94 #define	BKPT_SIZE	(4)		/* size of breakpoint inst */
     95 #define	BKPT_SET(inst, addr)	(BKPT_INST)
     96 
     97 #define	IS_BREAKPOINT_TRAP(type, code)	\
     98 	((type) == T_BREAKPOINT || (type) == T_KGDB_EXEC)
     99 #define IS_WATCHPOINT_TRAP(type, code)	\
    100 	((type) ==T_PA_WATCHPT || (type) == T_VA_WATCHPT)
    101 
    102 /*
    103  * Sparc cpus have no hardware single-step.
    104  */
    105 #define SOFTWARE_SSTEP
    106 
    107 bool		db_inst_trap_return(int inst);
    108 bool		db_inst_return(int inst);
    109 bool		db_inst_call(int inst);
    110 bool		db_inst_branch(int inst);
    111 int		db_inst_load(int inst);
    112 int		db_inst_store(int inst);
    113 bool		db_inst_unconditional_flow_transfer(int inst);
    114 db_addr_t	db_branch_taken(int inst, db_addr_t pc, db_regs_t *regs);
    115 
    116 #define inst_trap_return(ins)	db_inst_trap_return(ins)
    117 #define inst_return(ins)	db_inst_return(ins)
    118 #define inst_call(ins)		db_inst_call(ins)
    119 #define inst_branch(ins)	db_inst_branch(ins)
    120 #define inst_load(ins)		db_inst_load(ins)
    121 #define inst_store(ins)		db_inst_store(ins)
    122 #define	inst_unconditional_flow_transfer(ins) \
    123 				db_inst_unconditional_flow_transfer(ins)
    124 #define branch_taken(ins, pc, regs) \
    125 				db_branch_taken((ins), (pc), (regs))
    126 
    127 /* see note in db_interface.c about reversed breakpoint addrs */
    128 #define next_instr_address(pc, bd) \
    129 	((bd) ? (pc) : DDB_REGS->db_tf.tf_npc)
    130 
    131 #define DB_MACHINE_COMMANDS
    132 
    133 int kdb_trap(int, struct trapframe64 *);
    134 
    135 /*
    136  * We use elf symbols in DDB.
    137  */
    138 #define	DB_ELF_SYMBOLS
    139 
    140 /*
    141  * KGDB definitions
    142  */
    143 typedef u_long		kgdb_reg_t;
    144 #define KGDB_NUMREGS	125
    145 #define KGDB_BUFLEN	2048
    146 
    147 #endif	/* _SPARC64_DB_MACHDEP_H_ */
    148