The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/mips/include/db_machdep.h

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    1 /*      $OpenBSD: db_machdep.h,v 1.2 1998/09/15 10:50:12 pefo Exp $ */
    2 
    3 /*
    4  * Copyright (c) 1998 Per Fogelstrom, Opsycon AB
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  * 3. All advertising materials mentioning features or use of this software
   15  *    must display the following acknowledgement:
   16  *      This product includes software developed under OpenBSD by
   17  *      Per Fogelstrom, Opsycon AB, Sweden.
   18  * 4. The name of the author may not be used to endorse or promote products
   19  *    derived from this software without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
   22  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   23  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
   25  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      JNPR: db_machdep.h,v 1.7 2006/10/16 12:30:34 katta
   34  * $FreeBSD: releng/8.4/sys/mips/include/db_machdep.h 215938 2010-11-27 12:26:40Z jchandra $
   35  */
   36 
   37 #ifndef _MIPS_DB_MACHDEP_H_
   38 #define _MIPS_DB_MACHDEP_H_
   39 
   40 #include <machine/frame.h>
   41 #include <machine/trap.h>
   42 #include <machine/endian.h>
   43 
   44 typedef struct trapframe db_regs_t;
   45 extern db_regs_t        ddb_regs;       /* register state */
   46 
   47 typedef vm_offset_t     db_addr_t;      /* address - unsigned */
   48 typedef register_t      db_expr_t;      /* expression - signed */
   49 
   50 #if BYTE_ORDER == _BIG_ENDIAN
   51 #define BYTE_MSF        (1)
   52 #endif
   53 
   54 #define SOFTWARE_SSTEP          /* Need software single step */
   55 #define SOFTWARE_SSTEP_EMUL     /* next_instr_address() emulates 100% */
   56 db_addr_t       next_instr_address(db_addr_t, boolean_t);
   57 #define BKPT_SIZE                       (4)
   58 #define BKPT_SET(ins)                   (MIPS_BREAK_DDB)
   59 #define DB_VALID_BREAKPOINT(addr)       (((addr) & 3) == 0)
   60 
   61 #define IS_BREAKPOINT_TRAP(type, code)  ((type) == T_BREAK)
   62 #define IS_WATCHPOINT_TRAP(type, code)  (0)     /* XXX mips3 watchpoint */
   63 
   64 #define PC_REGS()       ((db_addr_t)kdb_thrctx->pcb_regs.pc)
   65 #define BKPT_SKIP                                       \
   66         do {                                                    \
   67                 if((db_get_value(kdb_frame->pc, sizeof(int), FALSE) &   \
   68                     ~MIPS_BREAK_VAL_MASK) == MIPS_BREAK_INSTR) {        \
   69                         kdb_frame->pc += BKPT_SIZE;                     \
   70                         kdb_thrctx->pcb_regs.pc +=  BKPT_SIZE;          \
   71                 }                                                       \
   72         } while (0);
   73 
   74 
   75 /*
   76  *  Test of instructions to see class.
   77  */
   78 #define IT_CALL         0x01
   79 #define IT_BRANCH       0x02
   80 #define IT_LOAD         0x03
   81 #define IT_STORE        0x04
   82 
   83 #define inst_branch(i)          (db_inst_type(i) == IT_BRANCH)
   84 #define inst_trap_return(i)     ((i) & 0)
   85 #define inst_call(i)            (db_inst_type(i) == IT_CALL)
   86 #define inst_return(i)          ((i) == 0x03e00008)
   87 #define inst_load(i)            (db_inst_type(i) == IT_LOAD)
   88 #define inst_store(i)           (db_inst_type(i) == IT_STORE)
   89 
   90 #define DB_SMALL_VALUE_MAX      0x7fffffff
   91 #define DB_SMALL_VALUE_MIN      (-0x400001)
   92 
   93 int db_inst_type(int);
   94 db_addr_t branch_taken(int inst, db_addr_t pc);
   95 void stacktrace_subr(register_t pc, register_t sp, register_t ra, int (*)(const char *, ...));
   96 int kdbpeek(int *);
   97 
   98 #endif  /* !_MIPS_DB_MACHDEP_H_ */

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