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db_machdep.h revision 1.11 
      1 /*	$NetBSD: db_machdep.h,v 1.11 2011/05/26 15:34:12 joerg Exp $	*/
      2 
      3 /*	$OpenBSD: db_machdep.h,v 1.5 2001/02/16 19:20:13 mickey Exp $	*/
      4 
      5 /*
      6  * Copyright (c) 1998-2004 Michael Shalayeff
      7  * All rights reserved.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     21  * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
     22  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     23  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     24  * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     26  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
     27  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     28  * THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifndef	_HPPA_DB_MACHDEP_H_
     32 #define	_HPPA_DB_MACHDEP_H_
     33 
     34 #include <uvm/uvm_extern.h>
     35 #include <machine/pcb.h>
     36 
     37 #define	DB_ELF_SYMBOLS
     38 #define	DB_ELFSIZE	32
     39 
     40 /* types the generic ddb module needs */
     41 typedef	vaddr_t db_addr_t;
     42 #define	DDB_EXPR_FMT	"l"		/* expression is long */
     43 typedef	long db_expr_t;
     44 
     45 typedef struct trapframe db_regs_t;
     46 extern db_regs_t	ddb_regs;
     47 #define	DDB_REGS	(&ddb_regs)
     48 
     49 /* DDB commands not in db_interface.c */
     50 void	db_dump_trap(db_expr_t, bool, db_expr_t, const char *);
     51 
     52 /*
     53  * Things needed by kgdb:
     54  */
     55 typedef long kgdb_reg_t;
     56 /* From gdb's config/pa/tm-pa.h NUM_REGS value */
     57 #define KGDB_NUMREGS	(128)
     58 /* XXX fredette - I think this is just a "big enough" kind of value */
     59 #define KGDB_BUFLEN     2048
     60 
     61 #define	PC_REGS(regs)	((db_addr_t)(regs)->tf_iioq_head)
     62 
     63 /* Breakpoint related definitions */
     64 #define	BKPT_ADDR(addr)	(addr)		/* breakpoint address */
     65 #define	BKPT_INST	0x00010000	/* break 0,8 */
     66 #define	BKPT_SIZE	sizeof(int)
     67 #define	BKPT_SET(inst, addr)	BKPT_INST
     68 
     69 #define	IS_BREAKPOINT_TRAP(type, code) (type != T_RECOVERY)
     70 #define	IS_WATCHPOINT_TRAP(type, code) 0
     71 
     72 /*
     73  * The PA-RISC leaves tf_iioq_head pointing to the break
     74  * instruction, so we don't have to define FIXUP_PC_AFTER_BREAK.
     75  * However, we can't allow ddb/kgdb to simply add BKPT_SIZE to
     76  * tf_iioq_head to advance past the breakpoint, since this doesn't
     77  * address tf_iioq_tail.  So, we define PC_ADVANCE.
     78  */
     79 #define	PC_ADVANCE(regs) do { 				\
     80 	(regs)->tf_iioq_head = (regs)->tf_iioq_tail;	\
     81 	(regs)->tf_iioq_tail += BKPT_SIZE;		\
     82 } while(/* CONSTCOND */ 0)
     83 
     84 #define DB_VALID_BREAKPOINT(addr) db_valid_breakpoint(addr)
     85 
     86 static __inline int inst_call(u_int ins) {
     87 	return (ins & 0xfc00e000) == 0xe8000000 ||
     88 	       (ins & 0xfc00e000) == 0xe8004000 ||
     89 	       (ins & 0xfc000000) == 0xe4000000;
     90 }
     91 static __inline int inst_branch(u_int ins) {
     92 	return (ins & 0xf0000000) == 0xe0000000 ||
     93 	       (ins & 0xf0000000) == 0xc0000000 ||
     94 	       (ins & 0xf0000000) == 0xa0000000 ||
     95 	       (ins & 0xf0000000) == 0x80000000;
     96 }
     97 static __inline int inst_load(u_int ins) {
     98 	return (ins & 0xf0000000) == 0x40000000 ||
     99 	       (ins & 0xf4000200) == 0x24000000 ||
    100 	       (ins & 0xfc000200) == 0x0c000000 ||
    101 	       (ins & 0xfc001fc0) != 0x0c0011c0;
    102 }
    103 static __inline int inst_store(u_int ins) {
    104 	return (ins & 0xf0000000) == 0x60000000 ||	/* st */
    105 	       (ins & 0xf4000200) == 0x24000200 ||	/* fst/cst */
    106 	       (ins & 0xfc000200) == 0x0c000200 ||	/* stby */
    107 	       (ins & 0xfc0003c0) == 0xc0001c0;		/* ldcw */
    108 }
    109 static __inline int inst_return(u_int ins) {
    110 	return (ins & 0xfc00e000) == 0xe800c000 ||
    111 	       (ins & 0xfc000000) == 0xe0000000;
    112 }
    113 static __inline int inst_trap_return(u_int ins)	{
    114 	return (ins & 0xfc001fc0) == 0x00000ca0;
    115 }
    116 
    117 #define db_clear_single_step(r)	((r)->tf_ipsw &= ~PSW_R)
    118 #define db_set_single_step(r)	((r)->tf_ipsw |= PSW_R)
    119 
    120 #define DB_MACHINE_COMMANDS
    121 
    122 int db_valid_breakpoint(db_addr_t);
    123 int kdb_trap(int, int, db_regs_t *);
    124 
    125 #endif /* _HPPA_DB_MACHDEP_H_ */
    126