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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  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, ADDRESS* 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 void be_ppc_single_step(CONTEXT* ctx, unsigned enable)
  42 {
  43 #ifndef MSR_SE
  44 # define MSR_SE (1<<10)
  45 #endif
  46     if (enable) ctx->Msr |= MSR_SE;
  47     else ctx->Msr &= ~MSR_SE;
  48 }
  49
  50 static void be_ppc_print_context(HANDLE hThread, const CONTEXT* ctx)
  51 {
  52     dbg_printf("Context printing for PPC not done yet\n");
  53 }
  54
  55 static void be_ppc_print_segment_info(HANDLE hThread, const CONTEXT* ctx)
  56 {
  57 }
  58
  59 static struct dbg_internal_var be_ppc_ctx[] =
  60 {
  61     {0,                 NULL,           0,                                      dbg_itype_none}
  62 };
  63
  64 static const struct dbg_internal_var* be_ppc_init_registers(CONTEXT* ctx)
  65 {
  66     dbg_printf("not done\n");
  67     return be_ppc_ctx;
  68 }
  69
  70 static unsigned be_ppc_is_step_over_insn(void* insn)
  71 {
  72     dbg_printf("not done\n");
  73     return FALSE;
  74 }
  75
  76 static unsigned be_ppc_is_function_return(void* insn)
  77 {
  78     dbg_printf("not done\n");
  79     return FALSE;
  80 }
  81
  82 static unsigned be_ppc_is_break_insn(void* insn)
  83 {
  84     dbg_printf("not done\n");
  85     return FALSE;
  86 }
  87
  88 static unsigned be_ppc_is_func_call(void* insn, void** insn_callee)
  89 {
  90     return FALSE;
  91 }
  92
  93 static void be_ppc_disasm_one_insn(ADDRESS* addr, int display)
  94 {
  95     dbg_printf("Disasm NIY\n");
  96 }
  97
  98 static unsigned be_ppc_insert_Xpoint(HANDLE hProcess, struct be_process_io* pio,
  99                                      CONTEXT* ctx, enum be_xpoint_type type,
 100                                      void* addr, unsigned long* val, unsigned size)
 101 {
 102     unsigned long       xbp;
 103     unsigned long       sz;
 104
 105     switch (type)
 106     {
 107     case be_xpoint_break:
 108         if (!size) return 0;
 109         if (!pio->read(hProcess, addr, val, 4, &sz) || sz != 4) return 0;
 110         xbp = 0x7d821008; /* 7d 82 10 08 ... in big endian */
 111         if (!pio->write(hProcess, addr, &xbp, 4, &sz) || sz != 4) return 0;
 112         break;
 113     default:
 114         dbg_printf("Unknown/unsupported bp type %c\n", type);
 115         return 0;
 116     }
 117     return 1;
 118 }
 119
 120 static unsigned be_ppc_remove_Xpoint(HANDLE hProcess, struct be_process_io* pio,
 121                                      CONTEXT* ctx, enum be_xpoint_type type,
 122                                      void* addr, unsigned long val, unsigned size)
 123 {
 124     unsigned long       sz;
 125
 126     switch (type)
 127     {
 128     case be_xpoint_break:
 129         if (!size) return 0;
 130         if (!pio->write(hProcess, addr, &val, 4, &sz) || sz == 4) return 0;
 131         break;
 132     default:
 133         dbg_printf("Unknown/unsupported bp type %c\n", type);
 134         return 0;
 135     }
 136     return 1;
 137 }
 138
 139 static unsigned be_ppc_is_watchpoint_set(const CONTEXT* ctx, unsigned idx)
 140 {
 141     dbg_printf("not done\n");
 142     return FALSE;
 143 }
 144
 145 static void be_ppc_clear_watchpoint(CONTEXT* ctx, unsigned idx)
 146 {
 147     dbg_printf("not done\n");
 148 }
 149
 150 static int be_ppc_adjust_pc_for_break(CONTEXT* ctx, BOOL way)
 151 {
 152     dbg_printf("not done\n");
 153     return 0;
 154 }
 155
 156 static int be_ppc_fetch_integer(const struct dbg_lvalue* lvalue, unsigned size,
 157                                 unsigned ext_sign, long long int* ret)
 158 {
 159     dbg_printf("not done\n");
 160     return FALSE;
 161 }
 162
 163 static int be_ppc_fetch_float(const struct dbg_lvalue* lvalue, unsigned size,
 164                               long double* ret)
 165 {
 166     dbg_printf("not done\n");
 167     return FALSE;
 168 }
 169
 170 struct backend_cpu be_ppc =
 171 {
 172     be_cpu_linearize,
 173     be_cpu_build_addr,
 174     be_ppc_get_addr,
 175     be_ppc_single_step,
 176     be_ppc_print_context,
 177     be_ppc_print_segment_info,
 178     be_ppc_init_registers,
 179     be_ppc_is_step_over_insn,
 180     be_ppc_is_function_return,
 181     be_ppc_is_break_insn,
 182     be_ppc_is_func_call,
 183     be_ppc_disasm_one_insn,
 184     be_ppc_insert_Xpoint,
 185     be_ppc_remove_Xpoint,
 186     be_ppc_is_watchpoint_set,
 187     be_ppc_clear_watchpoint,
 188     be_ppc_adjust_pc_for_break,
 189     be_ppc_fetch_integer,
 190     be_ppc_fetch_float,
 191 };
 192 #endif