db_interface.c

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    1 /*-
    2  * Copyright (c) 2015 The FreeBSD Foundation
    3  * All rights reserved.
    4  *
    5  * This software was developed by Semihalf under
    6  * the sponsorship of the FreeBSD Foundation.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  */
   29 
   30 #include <sys/cdefs.h>
   31 __FBSDID("$FreeBSD: releng/11.2/sys/arm64/arm64/db_interface.c 287136 2015-08-25 17:02:28Z andrew $");
   32 #include <sys/param.h>
   33 #include <sys/proc.h>
   34 #include <vm/vm.h>
   35 #include <vm/pmap.h>
   36 #include <vm/vm_map.h>
   37 
   38 #ifdef KDB
   39 #include <sys/kdb.h>
   40 #endif
   41 
   42 #include <ddb/ddb.h>
   43 #include <ddb/db_variables.h>
   44 
   45 #include <machine/cpu.h>
   46 #include <machine/pcb.h>
   47 #include <machine/stack.h>
   48 #include <machine/vmparam.h>
   49 
   50 static int
   51 db_frame(struct db_variable *vp, db_expr_t *valuep, int op)
   52 {
   53         long *reg;
   54 
   55         if (kdb_frame == NULL)
   56                 return (0);
   57 
   58         reg = (long *)((uintptr_t)kdb_frame + (db_expr_t)vp->valuep);
   59         if (op == DB_VAR_GET)
   60                 *valuep = *reg;
   61         else
   62                 *reg = *valuep;
   63         return (1);
   64 }
   65 
   66 #define DB_OFFSET(x)    (db_expr_t *)offsetof(struct trapframe, x)
   67 struct db_variable db_regs[] = {
   68         { "spsr", DB_OFFSET(tf_spsr),   db_frame },
   69         { "x0", DB_OFFSET(tf_x[0]),     db_frame },
   70         { "x1", DB_OFFSET(tf_x[1]),     db_frame },
   71         { "x2", DB_OFFSET(tf_x[2]),     db_frame },
   72         { "x3", DB_OFFSET(tf_x[3]),     db_frame },
   73         { "x4", DB_OFFSET(tf_x[4]),     db_frame },
   74         { "x5", DB_OFFSET(tf_x[5]),     db_frame },
   75         { "x6", DB_OFFSET(tf_x[6]),     db_frame },
   76         { "x7", DB_OFFSET(tf_x[7]),     db_frame },
   77         { "x8", DB_OFFSET(tf_x[8]),     db_frame },
   78         { "x9", DB_OFFSET(tf_x[9]),     db_frame },
   79         { "x10", DB_OFFSET(tf_x[10]),   db_frame },
   80         { "x11", DB_OFFSET(tf_x[11]),   db_frame },
   81         { "x12", DB_OFFSET(tf_x[12]),   db_frame },
   82         { "x13", DB_OFFSET(tf_x[13]),   db_frame },
   83         { "x14", DB_OFFSET(tf_x[14]),   db_frame },
   84         { "x15", DB_OFFSET(tf_x[15]),   db_frame },
   85         { "x16", DB_OFFSET(tf_x[16]),   db_frame },
   86         { "x17", DB_OFFSET(tf_x[17]),   db_frame },
   87         { "x18", DB_OFFSET(tf_x[18]),   db_frame },
   88         { "x19", DB_OFFSET(tf_x[19]),   db_frame },
   89         { "x20", DB_OFFSET(tf_x[20]),   db_frame },
   90         { "x21", DB_OFFSET(tf_x[21]),   db_frame },
   91         { "x22", DB_OFFSET(tf_x[22]),   db_frame },
   92         { "x23", DB_OFFSET(tf_x[23]),   db_frame },
   93         { "x24", DB_OFFSET(tf_x[24]),   db_frame },
   94         { "x25", DB_OFFSET(tf_x[25]),   db_frame },
   95         { "x26", DB_OFFSET(tf_x[26]),   db_frame },
   96         { "x27", DB_OFFSET(tf_x[27]),   db_frame },
   97         { "x28", DB_OFFSET(tf_x[28]),   db_frame },
   98         { "x29", DB_OFFSET(tf_x[29]),   db_frame },
   99         { "lr", DB_OFFSET(tf_lr),       db_frame },
  100         { "elr", DB_OFFSET(tf_elr),     db_frame },
  101         { "sp", DB_OFFSET(tf_sp), db_frame },
  102 };
  103 
  104 struct db_variable *db_eregs = db_regs + nitems(db_regs);
  105 
  106 void
  107 db_show_mdpcpu(struct pcpu *pc)
  108 {
  109 }
  110 
  111 /*
  112  * Read bytes from kernel address space for debugger.
  113  */
  114 int
  115 db_read_bytes(vm_offset_t addr, size_t size, char *data)
  116 {
  117         jmp_buf jb;
  118         void *prev_jb;
  119         const char *src;
  120         int ret;
  121 
  122         prev_jb = kdb_jmpbuf(jb);
  123         ret = setjmp(jb);
  124 
  125         if (ret == 0) {
  126                 src = (const char *)addr;
  127                 while (size-- > 0)
  128                         *data++ = *src++;
  129         }
  130         (void)kdb_jmpbuf(prev_jb);
  131 
  132         return (ret);
  133 }
  134 
  135 /*
  136  * Write bytes to kernel address space for debugger.
  137  */
  138 int
  139 db_write_bytes(vm_offset_t addr, size_t size, char *data)
  140 {
  141         jmp_buf jb;
  142         void *prev_jb;
  143         char *dst;
  144         int ret;
  145 
  146         prev_jb = kdb_jmpbuf(jb);
  147         ret = setjmp(jb);
  148         if (ret == 0) {
  149                 dst = (char *)addr;
  150                 while (size-- > 0)
  151                         *dst++ = *data++;
  152 
  153                 dsb(ish);
  154 
  155                 /* Clean D-cache and invalidate I-cache */
  156                 cpu_dcache_wb_range(addr, (vm_size_t)size);
  157                 cpu_icache_sync_range(addr, (vm_size_t)size);
  158         }
  159         (void)kdb_jmpbuf(prev_jb);
  160 
  161         return (ret);
  162 }

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FreeBSD/Linux Kernel Cross Reference sys/arm64/arm64/db_interface.c

FreeBSD/Linux Kernel Cross Reference
sys/arm64/arm64/db_interface.c