programs/winedbg/be_arm.c

   1 /*
   2  * Debugger ARM specific functions
   3  *
   4  * Copyright 2000-2003 Marcus Meissner
   5  *                2004 Eric Pouech
   6  *                2010 André Hentschel
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 #include "debugger.h"
  24
  25 #if defined(__arm__)
  26
  27 static unsigned be_arm_get_addr(HANDLE hThread, const CONTEXT* ctx,
  28                                 enum be_cpu_addr bca, ADDRESS64* addr)
  29 {
  30     switch (bca)
  31     {
  32     case be_cpu_addr_pc:
  33         return be_cpu_build_addr(hThread, ctx, addr, 0, ctx->Pc);
  34     case be_cpu_addr_stack:
  35         return be_cpu_build_addr(hThread, ctx, addr, 0, ctx->Sp);
  36     case be_cpu_addr_frame:
  37         return be_cpu_build_addr(hThread, ctx, addr, 0, ctx->Fp);
  38     }
  39     return FALSE;
  40 }
  41
  42 static unsigned be_arm_get_register_info(int regno, enum be_cpu_addr* kind)
  43 {
  44     dbg_printf("not done\n");
  45     return FALSE;
  46 }
  47
  48 static void be_arm_single_step(CONTEXT* ctx, unsigned enable)
  49 {
  50     dbg_printf("not done\n");
  51 }
  52
  53 static void be_arm_print_context(HANDLE hThread, const CONTEXT* ctx, int all_regs)
  54 {
  55     dbg_printf("Context printing for arm not done yet\n");
  56 }
  57
  58 static void be_arm_print_segment_info(HANDLE hThread, const CONTEXT* ctx)
  59 {
  60 }
  61
  62 static struct dbg_internal_var be_arm_ctx[] =
  63 {
  64     {0,                 NULL,           0,                                      dbg_itype_none}
  65 };
  66
  67 static unsigned be_arm_is_step_over_insn(const void* insn)
  68 {
  69     dbg_printf("not done\n");
  70     return FALSE;
  71 }
  72
  73 static unsigned be_arm_is_function_return(const void* insn)
  74 {
  75     dbg_printf("not done\n");
  76     return FALSE;
  77 }
  78
  79 static unsigned be_arm_is_break_insn(const void* insn)
  80 {
  81     dbg_printf("not done\n");
  82     return FALSE;
  83 }
  84
  85 static unsigned be_arm_is_func_call(const void* insn, ADDRESS64* callee)
  86 {
  87     return FALSE;
  88 }
  89
  90 static unsigned be_arm_is_jump(const void* insn, ADDRESS64* jumpee)
  91 {
  92     return FALSE;
  93 }
  94
  95 static void be_arm_disasm_one_insn(ADDRESS64* addr, int display)
  96 {
  97     dbg_printf("Disasm NIY\n");
  98 }
  99
 100 static unsigned be_arm_insert_Xpoint(HANDLE hProcess, const struct be_process_io* pio,
 101                                      CONTEXT* ctx, enum be_xpoint_type type,
 102                                      void* addr, unsigned long* val, unsigned size)
 103 {
 104     SIZE_T              sz;
 105
 106     switch (type)
 107     {
 108     case be_xpoint_break:
 109         if (!size) return 0;
 110         if (!pio->read(hProcess, addr, val, 4, &sz) || sz != 4) return 0;
 111     default:
 112         dbg_printf("Unknown/unsupported bp type %c\n", type);
 113         return 0;
 114     }
 115     return 1;
 116 }
 117
 118 static unsigned be_arm_remove_Xpoint(HANDLE hProcess, const struct be_process_io* pio,
 119                                      CONTEXT* ctx, enum be_xpoint_type type,
 120                                      void* addr, unsigned long val, unsigned size)
 121 {
 122     SIZE_T              sz;
 123
 124     switch (type)
 125     {
 126     case be_xpoint_break:
 127         if (!size) return 0;
 128         if (!pio->write(hProcess, addr, &val, 4, &sz) || sz == 4) return 0;
 129         break;
 130     default:
 131         dbg_printf("Unknown/unsupported bp type %c\n", type);
 132         return 0;
 133     }
 134     return 1;
 135 }
 136
 137 static unsigned be_arm_is_watchpoint_set(const CONTEXT* ctx, unsigned idx)
 138 {
 139     dbg_printf("not done\n");
 140     return FALSE;
 141 }
 142
 143 static void be_arm_clear_watchpoint(CONTEXT* ctx, unsigned idx)
 144 {
 145     dbg_printf("not done\n");
 146 }
 147
 148 static int be_arm_adjust_pc_for_break(CONTEXT* ctx, BOOL way)
 149 {
 150     if (way)
 151     {
 152         ctx->Pc--;
 153         return -1;
 154     }
 155     ctx->Pc++;
 156     return 1;
 157 }
 158
 159 static int be_arm_fetch_integer(const struct dbg_lvalue* lvalue, unsigned size,
 160                                 unsigned ext_sign, LONGLONG* ret)
 161 {
 162     dbg_printf("not done\n");
 163     return FALSE;
 164 }
 165
 166 static int be_arm_fetch_float(const struct dbg_lvalue* lvalue, unsigned size,
 167                               long double* ret)
 168 {
 169     dbg_printf("not done\n");
 170     return FALSE;
 171 }
 172
 173 struct backend_cpu be_arm =
 174 {
 175     IMAGE_FILE_MACHINE_ARM,
 176     4,
 177     be_cpu_linearize,
 178     be_cpu_build_addr,
 179     be_arm_get_addr,
 180     be_arm_get_register_info,
 181     be_arm_single_step,
 182     be_arm_print_context,
 183     be_arm_print_segment_info,
 184     be_arm_ctx,
 185     be_arm_is_step_over_insn,
 186     be_arm_is_function_return,
 187     be_arm_is_break_insn,
 188     be_arm_is_func_call,
 189     be_arm_is_jump,
 190     be_arm_disasm_one_insn,
 191     be_arm_insert_Xpoint,
 192     be_arm_remove_Xpoint,
 193     be_arm_is_watchpoint_set,
 194     be_arm_clear_watchpoint,
 195     be_arm_adjust_pc_for_break,
 196     be_arm_fetch_integer,
 197     be_arm_fetch_float,
 198 };
 199 #endif