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db_machdep.h revision 1.8 
      1 /*	$NetBSD: db_machdep.h,v 1.8 2009/11/03 05:07:26 snj 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 
     36 #define	DB_ELF_SYMBOLS
     37 #define	DB_ELFSIZE	32
     38 
     39 /* types the generic ddb module needs */
     40 typedef	vaddr_t db_addr_t;
     41 typedef	long db_expr_t;
     42 
     43 typedef struct trapframe db_regs_t;
     44 extern db_regs_t	ddb_regs;
     45 #define	DDB_REGS	(&ddb_regs)
     46 
     47 /*
     48  * Things needed by kgdb:
     49  */
     50 typedef long kgdb_reg_t;
     51 /* From gdb's config/pa/tm-pa.h NUM_REGS value */
     52 #define KGDB_NUMREGS	(128)
     53 /* XXX fredette - I think this is just a "big enough" kind of value */
     54 #define KGDB_BUFLEN     2048
     55 
     56 #define	PC_REGS(regs)	((db_addr_t)(regs)->tf_iioq_head)
     57 
     58 /* Breakpoint related definitions */
     59 #define	BKPT_ADDR(addr)	(addr)		/* breakpoint address */
     60 #define	BKPT_INST	0x00010000	/* break 0,8 */
     61 #define	BKPT_SIZE	sizeof(int)
     62 #define	BKPT_SET(inst, addr)	BKPT_INST
     63 
     64 #define	IS_BREAKPOINT_TRAP(type, code) (type != T_RECOVERY)
     65 #define	IS_WATCHPOINT_TRAP(type, code) 0
     66 
     67 /*
     68  * The PA-RISC leaves tf_iioq_head pointing to the break
     69  * instruction, so we don't have to define FIXUP_PC_AFTER_BREAK.
     70  * However, we can't allow ddb/kgdb to simply add BKPT_SIZE to
     71  * tf_iioq_head to advance past the breakpoint, since this doesn't
     72  * address tf_iioq_tail.  So, we define PC_ADVANCE.
     73  */
     74 #define	PC_ADVANCE(regs) do { 				\
     75 	(regs)->tf_iioq_head = (regs)->tf_iioq_tail;	\
     76 	(regs)->tf_iioq_tail += BKPT_SIZE;		\
     77 } while(/* CONSTCOND */ 0)
     78 
     79 #define DB_VALID_BREAKPOINT(addr) db_valid_breakpoint(addr)
     80 
     81 static __inline int inst_call(u_int ins) {
     82 	return (ins & 0xfc00e000) == 0xe8000000 ||
     83 	       (ins & 0xfc00e000) == 0xe8004000 ||
     84 	       (ins & 0xfc000000) == 0xe4000000;
     85 }
     86 static __inline int inst_branch(u_int ins) {
     87 	return (ins & 0xf0000000) == 0xe0000000 ||
     88 	       (ins & 0xf0000000) == 0xc0000000 ||
     89 	       (ins & 0xf0000000) == 0xa0000000 ||
     90 	       (ins & 0xf0000000) == 0x80000000;
     91 }
     92 static __inline int inst_load(u_int ins) {
     93 	return (ins & 0xf0000000) == 0x40000000 ||
     94 	       (ins & 0xf4000200) == 0x24000000 ||
     95 	       (ins & 0xfc000200) == 0x0c000000 ||
     96 	       (ins & 0xfc001fc0) != 0x0c0011c0;
     97 }
     98 static __inline int inst_store(u_int ins) {
     99 	return (ins & 0xf0000000) == 0x60000000 ||	/* st */
    100 	       (ins & 0xf4000200) == 0x24000200 ||	/* fst/cst */
    101 	       (ins & 0xfc000200) == 0x0c000200 ||	/* stby */
    102 	       (ins & 0xfc0003c0) == 0xc0001c0;		/* ldcw */
    103 }
    104 static __inline int inst_return(u_int ins) {
    105 	return (ins & 0xfc00e000) == 0xe800c000 ||
    106 	       (ins & 0xfc000000) == 0xe0000000;
    107 }
    108 static __inline int inst_trap_return(u_int ins)	{
    109 	return (ins & 0xfc001fc0) == 0x00000ca0;
    110 }
    111 
    112 #define db_clear_single_step(r)	((r)->tf_ipsw &= ~PSW_R)
    113 #define db_set_single_step(r)	((r)->tf_ipsw |= PSW_R)
    114 
    115 int db_valid_breakpoint(db_addr_t);
    116 int kdb_trap(int, int, db_regs_t *);
    117 
    118 #endif /* _HPPA_DB_MACHDEP_H_ */
    119