sys/arch/hppa/include/db_machdep.h

   1 /*      $NetBSD: db_machdep.h,v 1.7 2007/04/07 08:38:28 skrll 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_ */