db_machdep.h

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    1 /*-
    2  * Copyright (c) 2015-2016 Ruslan Bukin <br@bsdpad.com>
    3  * All rights reserved.
    4  *
    5  * Portions of this software were developed by SRI International and the
    6  * University of Cambridge Computer Laboratory under DARPA/AFRL contract
    7  * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
    8  *
    9  * Portions of this software were developed by the University of Cambridge
   10  * Computer Laboratory as part of the CTSRD Project, with support from the
   11  * UK Higher Education Innovation Fund (HEIF).
   12  *
   13  * Redistribution and use in source and binary forms, with or without
   14  * modification, are permitted provided that the following conditions
   15  * are met:
   16  * 1. Redistributions of source code must retain the above copyright
   17  *    notice, this list of conditions and the following disclaimer.
   18  * 2. Redistributions in binary form must reproduce the above copyright
   19  *    notice, this list of conditions and the following disclaimer in the
   20  *    documentation and/or other materials provided with the distribution.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   32  * SUCH DAMAGE.
   33  *
   34  * $FreeBSD$
   35  */
   36 
   37 #ifndef _MACHINE_DB_MACHDEP_H_
   38 #define _MACHINE_DB_MACHDEP_H_
   39 
   40 #include <machine/riscvreg.h>
   41 #include <machine/frame.h>
   42 #include <machine/trap.h>
   43 
   44 #define T_BREAKPOINT    (SCAUSE_BREAKPOINT)
   45 #define T_WATCHPOINT    (0)
   46 
   47 typedef vm_offset_t     db_addr_t;
   48 typedef long            db_expr_t;
   49 
   50 #define PC_REGS()       ((db_addr_t)kdb_frame->tf_sepc)
   51 
   52 #define BKPT_INST       (0x00100073)
   53 #define BKPT_SIZE       (INSN_SIZE)
   54 #define BKPT_SET(inst)  (BKPT_INST)
   55 
   56 #define BKPT_SKIP do {                                                  \
   57         uint32_t _instr;                                                \
   58                                                                         \
   59         _instr = db_get_value(PC_REGS(), sizeof(uint32_t), FALSE);      \
   60         if ((_instr & 0x3) == 0x3)                                      \
   61                 kdb_frame->tf_sepc += 4;        /* ebreak */            \
   62         else                                                            \
   63                 kdb_frame->tf_sepc += 2;        /* c.ebreak */          \
   64 } while (0)
   65 
   66 #define db_clear_single_step    kdb_cpu_clear_singlestep
   67 #define db_set_single_step      kdb_cpu_set_singlestep
   68 
   69 #define IS_BREAKPOINT_TRAP(type, code)  (type == T_BREAKPOINT)
   70 #define IS_WATCHPOINT_TRAP(type, code)  (type == T_WATCHPOINT)
   71 
   72 #define inst_trap_return(ins)   (ins == 0x10000073)     /* eret */
   73 #define inst_return(ins)        (ins == 0x00008067)     /* ret */
   74 #define inst_call(ins)          (((ins) & 0x7f) == 111 || \
   75                                  ((ins) & 0x7f) == 103) /* jal, jalr */
   76 
   77 #define inst_load(ins) ({                                                       \
   78         uint32_t tmp_instr = db_get_value(PC_REGS(), sizeof(uint32_t), FALSE);  \
   79         is_load_instr(tmp_instr);                                               \
   80 })
   81 
   82 #define inst_store(ins) ({                                                      \
   83         uint32_t tmp_instr = db_get_value(PC_REGS(), sizeof(uint32_t), FALSE);  \
   84         is_store_instr(tmp_instr);                                              \
   85 })
   86 
   87 #define is_load_instr(ins)      (((ins) & 0x7f) == 3)
   88 #define is_store_instr(ins)     (((ins) & 0x7f) == 35)
   89 
   90 #define next_instr_address(pc, bd)      ((bd) ? (pc) : ((pc) + 4))
   91 
   92 #define DB_ELFSIZE              64
   93 
   94 #endif /* !_MACHINE_DB_MACHDEP_H_ */

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

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