sys/arch/powerpc/include/db_machdep.h

   1 /*      $OpenBSD: db_machdep.h,v 1.2 1997/03/21 00:48:48 niklas Exp $   */
   2 /*      $NetBSD: db_machdep.h,v 1.19 2006/05/14 21:56:32 elad Exp $     */
   3
   4 /*
   5  * Mach Operating System
   6  * Copyright (c) 1992 Carnegie Mellon University
   7  * All Rights Reserved.
   8  *
   9  * Permission to use, copy, modify and distribute this software and its
  10  * documentation is hereby granted, provided that both the copyright
  11  * notice and this permission notice appear in all copies of the
  12  * software, derivative works or modified versions, and any portions
  13  * thereof, and that both notices appear in supporting documentation.
  14  *
  15  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  16  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  17  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  18  *
  19  * Carnegie Mellon requests users of this software to return to
  20  *
  21  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  22  *  School of Computer Science
  23  *  Carnegie Mellon University
  24  *  Pittsburgh PA 15213-3890
  25  *
  26  * any improvements or extensions that they make and grant Carnegie Mellon
  27  * the rights to redistribute these changes.
  28  */
  29
  30 /*
  31  * Machine-dependent defines for new kernel debugger.
  32  */
  33 #ifndef _PPC_DB_MACHDEP_H_
  34 #define _PPC_DB_MACHDEP_H_
  35
  36 #include <uvm/uvm_prot.h>
  37 #include <uvm/uvm_param.h>
  38 #include <machine/trap.h>
  39
  40 #ifdef _KERNEL
  41 #include "opt_ppcarch.h"
  42 #endif
  43
  44 #define DB_ELF_SYMBOLS
  45 #define DB_ELFSIZE      32
  46
  47 typedef vaddr_t         db_addr_t;      /* address - unsigned */
  48 typedef long            db_expr_t;      /* expression - signed */
  49 struct powerpc_saved_state {
  50         u_int32_t       r[32];          /* data registers */
  51         u_int32_t       iar;
  52         u_int32_t       msr;
  53         u_int32_t       lr;
  54         u_int32_t       ctr;
  55         u_int32_t       cr;
  56         u_int32_t       xer;
  57         u_int32_t       mq;
  58         u_int32_t       dear;
  59         u_int32_t       esr;
  60         u_int32_t       pid;
  61 };
  62 typedef struct powerpc_saved_state db_regs_t;
  63 extern  db_regs_t       ddb_regs;               /* register state */
  64 #define DDB_REGS        (&ddb_regs)
  65
  66 #define PC_REGS(regs)   (*(db_addr_t *)&(regs)->iar)
  67
  68 #define BKPT_ADDR(addr) (addr)          /* breakpoint address */
  69 #define BKPT_ASM        "trap"          /* should match BKPT_INST */
  70 #define BKPT_INST       0x7fe00008      /* breakpoint instruction */
  71 #define BKPT_SIZE       (4)             /* size of breakpoint inst */
  72 #define BKPT_SET(inst, addr)    (BKPT_INST)
  73
  74 #ifndef PPC_IBM4XX
  75 #define SR_SINGLESTEP   0x400
  76 #define db_clear_single_step(regs)      ((regs)->msr &= ~SR_SINGLESTEP)
  77 #define db_set_single_step(regs)        ((regs)->msr |=  SR_SINGLESTEP)
  78 #else
  79 #define SOFTWARE_SSTEP
  80 #endif
  81
  82 #define T_BREAKPOINT    0xffff
  83 #define IS_BREAKPOINT_TRAP(type, code)  ((type) == T_BREAKPOINT)
  84
  85 #define T_WATCHPOINT    0xeeee
  86 #ifdef T_WATCHPOINT
  87 #define IS_WATCHPOINT_TRAP(type, code)  ((type) == T_WATCHPOINT)
  88 #else
  89 #define IS_WATCHPOINT_TRAP(type, code)  0
  90 #endif
  91
  92 #define M_RTS           0xfc0007ff
  93 #define I_RTS           0x4c000020
  94 #define I_BLRL          0x4c000021
  95 #define M_BC            0xfc000001
  96 #define I_BC            0x40000000
  97 #define I_BCL           0x40000001
  98 #define M_B             0xfc000001
  99 #define I_B             0x48000000
 100 #define I_BL            0x48000001
 101 #define M_BCTR          0xfc0007fe
 102 #define I_BCTR          0x4c000420
 103 #define I_BCTRL         0x4c000421
 104 #define M_RFI           0xfc0007fe
 105 #define I_RFI           0x4c000064
 106
 107 #define inst_trap_return(ins)   (((ins)&M_RFI) == I_RFI)
 108 #define inst_return(ins)        (((ins)&M_RTS) == I_RTS)
 109 #define inst_call(ins)          (((ins)&M_BC  ) == I_BCL   || \
 110                                  ((ins)&M_B   ) == I_BL    || \
 111                                  ((ins)&M_BCTR) == I_BCTRL || \
 112                                  ((ins)&M_RTS ) == I_BLRL )
 113 #define inst_branch(ins)        (((ins)&M_BC  ) == I_BC || \
 114                                  ((ins)&M_B   ) == I_B  || \
 115                                  ((ins)&M_BCTR) == I_BCTR )
 116 #define inst_unconditional_flow_transfer(ins)   \
 117                                 (((ins)&M_B   ) == I_B    || \
 118                                  ((ins)&M_BCTR) == I_BCTR )
 119 #define inst_load(ins)          0
 120 #define inst_store(ins)         0
 121 #ifdef PPC_IBM4XX
 122 #define next_instr_address(v, b) ((db_addr_t) ((b) ? (v) : ((v) + 4)))
 123 extern db_addr_t branch_taken(int, db_addr_t, db_regs_t *);
 124 #endif
 125
 126 /*
 127  * GDB's register array is:
 128  *  32 4-byte GPRs
 129  *  32 8-byte FPRs
 130  *   7 4-byte UISA special-purpose registers
 131  *  16 4-byte segment registers
 132  *  32 4-byte standard OEA special-purpose registers,
 133  * and up to 64 4-byte non-standard OES special-purpose registers.
 134  * GDB keeps some extra space, so the total size of the register array
 135  * they use is 880 bytes (gdb-5.0).
 136  */
 137 typedef long    kgdb_reg_t;
 138 #define KGDB_NUMREGS    220     /* Treat all registers as 4-byte */
 139 #define KGDB_BUFLEN     (2*KGDB_NUMREGS*sizeof(kgdb_reg_t)+1)
 140 #define KGDB_PPC_PC_REG         96      /* first UISA SP register */
 141 #define KGDB_PPC_MSR_REG        97
 142 #define KGDB_PPC_CR_REG         98
 143 #define KGDB_PPC_LR_REG         99
 144 #define KGDB_PPC_CTR_REG        100
 145 #define KGDB_PPC_XER_REG        101
 146 #define KGDB_PPC_MQ_REG         102
 147
 148 #ifdef _KERNEL
 149
 150 void    kdb_kintr(void *);
 151 int     kdb_trap(int, void *);
 152
 153 #ifdef PPC_IBM4XX
 154 /*
 155  * We have machine-dependent commands.
 156  */
 157 #define DB_MACHINE_COMMANDS
 158 #endif
 159
 160 #endif /* _KERNEL */
 161
 162 #endif  /* _PPC_DB_MACHDEP_H_ */