programs/winedbg/be_ppc.c

   1 /*
   2  * Debugger Power PC specific functions
   3  *
   4  * Copyright 2000-2003 Marcus Meissner
   5  *                2004 Eric Pouech
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include "debugger.h"
  23
  24 #if defined(__powerpc__)
  25
  26 static unsigned be_ppc_get_addr(HANDLE hThread, const CONTEXT* ctx,
  27                                 enum be_cpu_addr bca, ADDRESS64* addr)
  28 {
  29     switch (bca)
  30     {
  31     case be_cpu_addr_pc:
  32         return be_cpu_build_addr(hThread, ctx, addr, 0, ctx->Iar);
  33     default:
  34     case be_cpu_addr_stack:
  35     case be_cpu_addr_frame:
  36         dbg_printf("not done\n");
  37     }
  38     return FALSE;
  39 }
  40
  41 static unsigned be_ppc_get_register_info(int regno, enum be_cpu_addr* kind)
  42 {
  43     dbg_printf("not done\n");
  44     return FALSE;
  45 }
  46
  47 static void be_ppc_single_step(CONTEXT* ctx, unsigned enable)
  48 {
  49 #ifndef MSR_SE
  50 # define MSR_SE (1<<10)
  51 #endif
  52     if (enable) ctx->Msr |= MSR_SE;
  53     else ctx->Msr &= ~MSR_SE;
  54 }
  55
  56 static void be_ppc_print_context(HANDLE hThread, const CONTEXT* ctx, int all_regs)
  57 {
  58     dbg_printf("Context printing for PPC not done yet\n");
  59 }
  60
  61 static void be_ppc_print_segment_info(HANDLE hThread, const CONTEXT* ctx)
  62 {
  63 }
  64
  65 static struct dbg_internal_var be_ppc_ctx[] =
  66 {
  67     {0,                 NULL,           0,                                      dbg_itype_none}
  68 };
  69
  70 static unsigned be_ppc_is_step_over_insn(const void* insn)
  71 {
  72     dbg_printf("not done\n");
  73     return FALSE;
  74 }
  75
  76 static unsigned be_ppc_is_function_return(const void* insn)
  77 {
  78     dbg_printf("not done\n");
  79     return FALSE;
  80 }
  81
  82 static unsigned be_ppc_is_break_insn(const void* insn)
  83 {
  84     dbg_printf("not done\n");
  85     return FALSE;
  86 }
  87
  88 static unsigned be_ppc_is_func_call(const void* insn, ADDRESS64* callee)
  89 {
  90     return FALSE;
  91 }
  92
  93 static unsigned be_ppc_is_jump(const void* insn, ADDRESS64* jumpee)
  94 {
  95     return FALSE;
  96 }
  97
  98 static void be_ppc_disasm_one_insn(ADDRESS64* addr, int display)
  99
 100 {
 101     dbg_printf("Disasm NIY\n");
 102 }
 103
 104 static unsigned be_ppc_insert_Xpoint(HANDLE hProcess, const struct be_process_io* pio,
 105                                      CONTEXT* ctx, enum be_xpoint_type type,
 106                                      void* addr, unsigned long* val, unsigned size)
 107 {
 108     unsigned long       xbp;
 109     SIZE_T              sz;
 110
 111     switch (type)
 112     {
 113     case be_xpoint_break:
 114         if (!size) return 0;
 115         if (!pio->read(hProcess, addr, val, 4, &sz) || sz != 4) return 0;
 116         xbp = 0x7d821008; /* 7d 82 10 08 ... in big endian */
 117         if (!pio->write(hProcess, addr, &xbp, 4, &sz) || sz != 4) return 0;
 118         break;
 119     default:
 120         dbg_printf("Unknown/unsupported bp type %c\n", type);
 121         return 0;
 122     }
 123     return 1;
 124 }
 125
 126 static unsigned be_ppc_remove_Xpoint(HANDLE hProcess, const struct be_process_io* pio,
 127                                      CONTEXT* ctx, enum be_xpoint_type type,
 128                                      void* addr, unsigned long val, unsigned size)
 129 {
 130     SIZE_T              sz;
 131
 132     switch (type)
 133     {
 134     case be_xpoint_break:
 135         if (!size) return 0;
 136         if (!pio->write(hProcess, addr, &val, 4, &sz) || sz == 4) return 0;
 137         break;
 138     default:
 139         dbg_printf("Unknown/unsupported bp type %c\n", type);
 140         return 0;
 141     }
 142     return 1;
 143 }
 144
 145 static unsigned be_ppc_is_watchpoint_set(const CONTEXT* ctx, unsigned idx)
 146 {
 147     dbg_printf("not done\n");
 148     return FALSE;
 149 }
 150
 151 static void be_ppc_clear_watchpoint(CONTEXT* ctx, unsigned idx)
 152 {
 153     dbg_printf("not done\n");
 154 }
 155
 156 static int be_ppc_adjust_pc_for_break(CONTEXT* ctx, BOOL way)
 157 {
 158     dbg_printf("not done\n");
 159     return 0;
 160 }
 161
 162 static int be_ppc_fetch_integer(const struct dbg_lvalue* lvalue, unsigned size,
 163                                 unsigned ext_sign, LONGLONG* ret)
 164 {
 165     dbg_printf("not done\n");
 166     return FALSE;
 167 }
 168
 169 static int be_ppc_fetch_float(const struct dbg_lvalue* lvalue, unsigned size,
 170                               long double* ret)
 171 {
 172     dbg_printf("not done\n");
 173     return FALSE;
 174 }
 175
 176 struct backend_cpu be_ppc =
 177 {
 178     IMAGE_FILE_MACHINE_POWERPC,
 179     4,
 180     be_cpu_linearize,
 181     be_cpu_build_addr,
 182     be_ppc_get_addr,
 183     be_ppc_get_register_info,
 184     be_ppc_single_step,
 185     be_ppc_print_context,
 186     be_ppc_print_segment_info,
 187     be_ppc_ctx,
 188     be_ppc_is_step_over_insn,
 189     be_ppc_is_function_return,
 190     be_ppc_is_break_insn,
 191     be_ppc_is_func_call,
 192     be_ppc_is_jump,
 193     be_ppc_disasm_one_insn,
 194     be_ppc_insert_Xpoint,
 195     be_ppc_remove_Xpoint,
 196     be_ppc_is_watchpoint_set,
 197     be_ppc_clear_watchpoint,
 198     be_ppc_adjust_pc_for_break,
 199     be_ppc_fetch_integer,
 200     be_ppc_fetch_float,
 201 };
 202 #endif