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/8.0/sys/mips/include/db_machdep.h 178172 2008-04-13 07:27:37Z imp $
   35  */
   36 
   37 #ifndef _MIPS_DB_MACHDEP_H_
   38 #define _MIPS_DB_MACHDEP_H_
   39 
   40 #include <machine/frame.h>
   41 #include <machine/psl.h>
   42 #include <machine/trap.h>
   43 #include <machine/endian.h>
   44 
   45 typedef struct trapframe db_regs_t;
   46 extern db_regs_t        ddb_regs;       /* register state */
   47 
   48 typedef vm_offset_t     db_addr_t;      /* address - unsigned */
   49 typedef int             db_expr_t;      /* expression - signed */
   50 
   51 #if BYTE_ORDER == _BIG_ENDIAN
   52 #define BYTE_MSF        (1)
   53 #endif
   54 
   55 #define SOFTWARE_SSTEP          /* Need software single step */
   56 #define SOFTWARE_SSTEP_EMUL     /* next_instr_address() emulates 100% */
   57 db_addr_t       next_instr_address(db_addr_t, boolean_t);
   58 #define BKPT_SIZE                       (4)
   59 #define BKPT_SET(ins)                   (BREAK_DDB)
   60 #define DB_VALID_BREAKPOINT(addr)       (((addr) & 3) == 0)
   61 
   62 #define IS_BREAKPOINT_TRAP(type, code)  ((type) == T_BREAK)
   63 #define IS_WATCHPOINT_TRAP(type, code)  (0)     /* XXX mips3 watchpoint */
   64 
   65 #define PC_REGS()       ((db_addr_t)kdb_thrctx->pcb_regs.pc)
   66 #define BKPT_SKIP                                       \
   67         do {                                                    \
   68                 if((db_get_value(kdb_frame->pc, sizeof(int), FALSE) &   \
   69                     ~BREAK_VAL_MASK) == BREAK_INSTR) {                  \
   70                         kdb_frame->pc += BKPT_SIZE;                     \
   71                         kdb_thrctx->pcb_regs.pc +=  BKPT_SIZE;          \
   72                 }                                                       \
   73         } while (0);
   74 
   75 
   76 /*
   77  *  Test of instructions to see class.
   78  */
   79 #define IT_CALL         0x01
   80 #define IT_BRANCH       0x02
   81 #define IT_LOAD         0x03
   82 #define IT_STORE        0x04
   83 
   84 #define inst_branch(i)          (db_inst_type(i) == IT_BRANCH)
   85 #define inst_trap_return(i)     ((i) & 0)
   86 #define inst_call(i)            (db_inst_type(i) == IT_CALL)
   87 #define inst_return(i)          ((i) == 0x03e00008)
   88 #define inst_load(i)            (db_inst_type(i) == IT_LOAD)
   89 #define inst_store(i)           (db_inst_type(i) == IT_STORE)
   90 
   91 #define DB_SMALL_VALUE_MAX      0x7fffffff
   92 #define DB_SMALL_VALUE_MIN      (-0x400001)
   93 
   94 int db_inst_type(int);
   95 void db_dump_tlb(int, int);
   96 db_addr_t branch_taken(int inst, db_addr_t pc);
   97 void stacktrace_subr(db_regs_t *, int (*)(const char *, ...));
   98 
   99 #endif  /* !_MIPS_DB_MACHDEP_H_ */

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

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sys/mips/include/db_machdep.h