db_machdep.h

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    1 /*-
    2  * Copyright (c) 2014 Andrew Turner
    3  * Copyright (c) 2014-2015 The FreeBSD Foundation
    4  * All rights reserved.
    5  *
    6  * This software was developed by Semihalf under
    7  * sponsorship from the FreeBSD Foundation.
    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 AND CONTRIBUTORS ``AS IS'' AND
   19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   28  * SUCH DAMAGE.
   29  *
   30  * $FreeBSD: releng/11.2/sys/arm64/include/db_machdep.h 281494 2015-04-13 14:43:10Z andrew $
   31  */
   32 
   33 #ifndef _MACHINE_DB_MACHDEP_H_
   34 #define _MACHINE_DB_MACHDEP_H_
   35 
   36 #include <machine/armreg.h>
   37 #include <machine/frame.h>
   38 #include <machine/trap.h>
   39 
   40 #define T_BREAKPOINT    (EXCP_BRK)
   41 #define T_WATCHPOINT    (EXCP_WATCHPT_EL1)
   42 
   43 typedef vm_offset_t     db_addr_t;
   44 typedef long            db_expr_t;
   45 
   46 #define PC_REGS()       ((db_addr_t)kdb_thrctx->pcb_pc)
   47 
   48 #define BKPT_INST       (0xd4200000)
   49 #define BKPT_SIZE       (4)
   50 #define BKPT_SET(inst)  (BKPT_INST)
   51 
   52 #define BKPT_SKIP do {                                                  \
   53         kdb_frame->tf_elr += BKPT_SIZE; \
   54 } while (0)
   55 
   56 #define db_clear_single_step    kdb_cpu_clear_singlestep
   57 #define db_set_single_step      kdb_cpu_set_singlestep
   58 
   59 #define IS_BREAKPOINT_TRAP(type, code)  (type == T_BREAKPOINT)
   60 #define IS_WATCHPOINT_TRAP(type, code)  (type == T_WATCHPOINT)
   61 
   62 #define inst_trap_return(ins)   (0)
   63 /* ret */
   64 #define inst_return(ins)        (((ins) & 0xfffffc1fu) == 0xd65f0000)
   65 #define inst_call(ins)          (((ins) & 0xfc000000u) == 0x94000000u || /* BL */ \
   66                                  ((ins) & 0xfffffc1fu) == 0xd63f0000u) /* BLR */
   67 
   68 #define inst_load(ins) ({                                                       \
   69         uint32_t tmp_instr = db_get_value(PC_REGS(), sizeof(uint32_t), FALSE);  \
   70         is_load_instr(tmp_instr);                                               \
   71 })
   72 
   73 #define inst_store(ins) ({                                                      \
   74         uint32_t tmp_instr = db_get_value(PC_REGS(), sizeof(uint32_t), FALSE);  \
   75         is_store_instr(tmp_instr);                                              \
   76 })
   77 
   78 #define is_load_instr(ins)      ((((ins) & 0x3b000000u) == 0x18000000u) || /* literal */ \
   79                                  (((ins) & 0x3f400000u) == 0x08400000u) ||  /* exclusive */ \
   80                                  (((ins) & 0x3bc00000u) == 0x28400000u) || /* no-allocate pair */ \
   81                                  ((((ins) & 0x3b200c00u) == 0x38000400u) && \
   82                                   (((ins) & 0x3be00c00u) != 0x38000400u) && \
   83                                   (((ins) & 0xffe00c00u) != 0x3c800400u)) || /* immediate post-indexed */ \
   84                                  ((((ins) & 0x3b200c00u) == 0x38000c00u) && \
   85                                   (((ins) & 0x3be00c00u) != 0x38000c00u) && \
   86                                   (((ins) & 0xffe00c00u) != 0x3c800c00u)) || /* immediate pre-indexed */ \
   87                                  ((((ins) & 0x3b200c00u) == 0x38200800u) && \
   88                                   (((ins) & 0x3be00c00u) != 0x38200800u) && \
   89                                   (((ins) & 0xffe00c00u) != 0x3ca00c80u)) || /* register offset */ \
   90                                  ((((ins) & 0x3b200c00u) == 0x38000800u) && \
   91                                   (((ins) & 0x3be00c00u) != 0x38000800u)) || /* unprivileged */ \
   92                                  ((((ins) & 0x3b200c00u) == 0x38000000u) && \
   93                                   (((ins) & 0x3be00c00u) != 0x38000000u) && \
   94                                   (((ins) & 0xffe00c00u) != 0x3c800000u)) ||  /* unscaled immediate */ \
   95                                  ((((ins) & 0x3b000000u) == 0x39000000u) && \
   96                                   (((ins) & 0x3bc00000u) != 0x39000000u) && \
   97                                   (((ins) & 0xffc00000u) != 0x3d800000u)) &&  /* unsigned immediate */ \
   98                                  (((ins) & 0x3bc00000u) == 0x28400000u) || /* pair (offset) */ \
   99                                  (((ins) & 0x3bc00000u) == 0x28c00000u) || /* pair (post-indexed) */ \
  100                                  (((ins) & 0x3bc00000u) == 0x29800000u)) /* pair (pre-indexed) */
  101 
  102 #define is_store_instr(ins)     ((((ins) & 0x3f400000u) == 0x08000000u) || /* exclusive */ \
  103                                  (((ins) & 0x3bc00000u) == 0x28000000u) || /* no-allocate pair */ \
  104                                  ((((ins) & 0x3be00c00u) == 0x38000400u) || \
  105                                   (((ins) & 0xffe00c00u) == 0x3c800400u)) || /* immediate post-indexed */ \
  106                                  ((((ins) & 0x3be00c00u) == 0x38000c00u) || \
  107                                   (((ins) & 0xffe00c00u) == 0x3c800c00u)) || /* immediate pre-indexed */ \
  108                                  ((((ins) & 0x3be00c00u) == 0x38200800u) || \
  109                                   (((ins) & 0xffe00c00u) == 0x3ca00800u)) || /* register offset */ \
  110                                  (((ins) & 0x3be00c00u) == 0x38000800u) ||  /* unprivileged */ \
  111                                  ((((ins) & 0x3be00c00u) == 0x38000000u) || \
  112                                   (((ins) & 0xffe00c00u) == 0x3c800000u)) ||  /* unscaled immediate */ \
  113                                  ((((ins) & 0x3bc00000u) == 0x39000000u) || \
  114                                   (((ins) & 0xffc00000u) == 0x3d800000u)) ||  /* unsigned immediate */ \
  115                                  (((ins) & 0x3bc00000u) == 0x28000000u) || /* pair (offset) */ \
  116                                  (((ins) & 0x3bc00000u) == 0x28800000u) || /* pair (post-indexed) */ \
  117                                  (((ins) & 0x3bc00000u) == 0x29800000u)) /* pair (pre-indexed) */
  118 
  119 #define next_instr_address(pc, bd)      ((bd) ? (pc) : ((pc) + 4))
  120 
  121 #define DB_SMALL_VALUE_MAX      (0x7fffffff)
  122 #define DB_SMALL_VALUE_MIN      (-0x40001)
  123 
  124 #define DB_ELFSIZE              64
  125 
  126 #endif /* !_MACHINE_DB_MACHDEP_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/arm64/include/db_machdep.h

FreeBSD/Linux Kernel Cross Reference
sys/arm64/include/db_machdep.h