| 1 | /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * |
| 2 | * Mupen64plus - dbg_breakpoints.c * |
| 3 | * Mupen64Plus homepage: http://code.google.com/p/mupen64plus/ * |
| 4 | * Copyright (C) 2008 DarkJeztr HyperHacker * |
| 5 | * * |
| 6 | * This program is free software; you can redistribute it and/or modify * |
| 7 | * it under the terms of the GNU General Public License as published by * |
| 8 | * the Free Software Foundation; either version 2 of the License, or * |
| 9 | * (at your option) any later version. * |
| 10 | * * |
| 11 | * This program is distributed in the hope that it will be useful, * |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
| 14 | * GNU General Public License for more details. * |
| 15 | * * |
| 16 | * You should have received a copy of the GNU General Public License * |
| 17 | * along with this program; if not, write to the * |
| 18 | * Free Software Foundation, Inc., * |
| 19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * |
| 20 | * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ |
| 21 | |
| 22 | #include <SDL.h> |
| 23 | #include <SDL_thread.h> |
| 24 | |
| 25 | #include "dbg_types.h" |
| 26 | #include "debugger.h" |
| 27 | #include "dbg_breakpoints.h" |
| 28 | #include "dbg_memory.h" |
| 29 | |
| 30 | #include "api/m64p_types.h" |
| 31 | #include "api/callbacks.h" |
| 32 | |
| 33 | int g_NumBreakpoints=0; |
| 34 | breakpoint g_Breakpoints[BREAKPOINTS_MAX_NUMBER]; |
| 35 | |
| 36 | |
| 37 | int add_breakpoint( uint32 address ) |
| 38 | { |
| 39 | if( g_NumBreakpoints == BREAKPOINTS_MAX_NUMBER ) { |
| 40 | DebugMessage(M64MSG_ERROR, "BREAKPOINTS_MAX_NUMBER have been reached."); |
| 41 | return -1; |
| 42 | } |
| 43 | g_Breakpoints[g_NumBreakpoints].address=address; |
| 44 | g_Breakpoints[g_NumBreakpoints].endaddr=address; |
| 45 | BPT_SET_FLAG(g_Breakpoints[g_NumBreakpoints], BPT_FLAG_EXEC); |
| 46 | |
| 47 | enable_breakpoint(g_NumBreakpoints); |
| 48 | |
| 49 | return g_NumBreakpoints++; |
| 50 | } |
| 51 | |
| 52 | int add_breakpoint_struct(breakpoint* newbp) |
| 53 | { |
| 54 | if( g_NumBreakpoints == BREAKPOINTS_MAX_NUMBER ) { |
| 55 | DebugMessage(M64MSG_ERROR, "BREAKPOINTS_MAX_NUMBER have been reached."); |
| 56 | return -1; |
| 57 | } |
| 58 | |
| 59 | memcpy(&g_Breakpoints[g_NumBreakpoints], newbp, sizeof(breakpoint)); |
| 60 | |
| 61 | if(BPT_CHECK_FLAG(g_Breakpoints[g_NumBreakpoints], BPT_FLAG_ENABLED)) |
| 62 | { |
| 63 | BPT_CLEAR_FLAG(g_Breakpoints[g_NumBreakpoints], BPT_FLAG_ENABLED); |
| 64 | enable_breakpoint( g_NumBreakpoints ); |
| 65 | } |
| 66 | |
| 67 | return g_NumBreakpoints++; |
| 68 | } |
| 69 | |
| 70 | void enable_breakpoint( int bpt) |
| 71 | { |
| 72 | breakpoint *curBpt = g_Breakpoints + bpt; |
| 73 | uint64 bptAddr; |
| 74 | |
| 75 | if(BPT_CHECK_FLAG((*curBpt), BPT_FLAG_READ)) { |
| 76 | for(bptAddr = curBpt->address; bptAddr <= (curBpt->endaddr | 0xFFFF); bptAddr+=0x10000) |
| 77 | if(lookup_breakpoint((uint32) bptAddr & 0xFFFF0000, 0x10000, BPT_FLAG_ENABLED | BPT_FLAG_READ) == -1) |
| 78 | activate_memory_break_read((uint32) bptAddr); |
| 79 | } |
| 80 | |
| 81 | if(BPT_CHECK_FLAG((*curBpt), BPT_FLAG_WRITE)) { |
| 82 | for(bptAddr = curBpt->address; bptAddr <= (curBpt->endaddr | 0xFFFF); bptAddr+=0x10000) |
| 83 | if(lookup_breakpoint((uint32) bptAddr & 0xFFFF0000, 0x10000, BPT_FLAG_ENABLED | BPT_FLAG_WRITE) == -1) |
| 84 | activate_memory_break_write((uint32) bptAddr); |
| 85 | } |
| 86 | |
| 87 | BPT_SET_FLAG(g_Breakpoints[bpt], BPT_FLAG_ENABLED); |
| 88 | } |
| 89 | |
| 90 | void disable_breakpoint( int bpt ) |
| 91 | { |
| 92 | breakpoint *curBpt = g_Breakpoints + bpt; |
| 93 | uint64 bptAddr; |
| 94 | |
| 95 | BPT_CLEAR_FLAG(g_Breakpoints[bpt], BPT_FLAG_ENABLED); |
| 96 | |
| 97 | if(BPT_CHECK_FLAG((*curBpt), BPT_FLAG_READ)) { |
| 98 | for(bptAddr = curBpt->address; bptAddr <= ((unsigned long)(curBpt->endaddr | 0xFFFF)); bptAddr+=0x10000) |
| 99 | if(lookup_breakpoint((uint32) bptAddr & 0xFFFF0000, 0x10000, BPT_FLAG_ENABLED | BPT_FLAG_READ) == -1) |
| 100 | deactivate_memory_break_read((uint32) bptAddr); |
| 101 | } |
| 102 | |
| 103 | if(BPT_CHECK_FLAG((*curBpt), BPT_FLAG_WRITE)) { |
| 104 | for(bptAddr = curBpt->address; bptAddr <= ((unsigned long)(curBpt->endaddr | 0xFFFF)); bptAddr+=0x10000) |
| 105 | if(lookup_breakpoint((uint32) bptAddr & 0xFFFF0000, 0x10000, BPT_FLAG_ENABLED | BPT_FLAG_WRITE) == -1) |
| 106 | deactivate_memory_break_write((uint32) bptAddr); |
| 107 | } |
| 108 | |
| 109 | BPT_CLEAR_FLAG(g_Breakpoints[bpt], BPT_FLAG_ENABLED); |
| 110 | } |
| 111 | |
| 112 | void remove_breakpoint_by_num( int bpt ) |
| 113 | { |
| 114 | int curBpt; |
| 115 | |
| 116 | if(BPT_CHECK_FLAG(g_Breakpoints[bpt], BPT_FLAG_ENABLED)) |
| 117 | disable_breakpoint( bpt ); |
| 118 | |
| 119 | for(curBpt=bpt+1; curBpt<g_NumBreakpoints; curBpt++) |
| 120 | g_Breakpoints[curBpt-1]=g_Breakpoints[curBpt]; |
| 121 | |
| 122 | g_NumBreakpoints--; |
| 123 | } |
| 124 | |
| 125 | void remove_breakpoint_by_address( uint32 address ) |
| 126 | { |
| 127 | int bpt = lookup_breakpoint( address, 1, 0 ); |
| 128 | if(bpt==-1) |
| 129 | { |
| 130 | DebugMessage(M64MSG_ERROR, "Tried to remove Nonexistant breakpoint %x!", address); |
| 131 | } |
| 132 | else |
| 133 | remove_breakpoint_by_num( bpt ); |
| 134 | } |
| 135 | |
| 136 | void replace_breakpoint_num( int bpt, breakpoint* copyofnew ) |
| 137 | { |
| 138 | |
| 139 | if(BPT_CHECK_FLAG(g_Breakpoints[bpt], BPT_FLAG_ENABLED)) |
| 140 | disable_breakpoint( bpt ); |
| 141 | |
| 142 | memcpy(&(g_Breakpoints[bpt]), copyofnew, sizeof(breakpoint)); |
| 143 | |
| 144 | if(BPT_CHECK_FLAG(g_Breakpoints[bpt], BPT_FLAG_ENABLED)) |
| 145 | { |
| 146 | BPT_CLEAR_FLAG(g_Breakpoints[bpt], BPT_FLAG_ENABLED); |
| 147 | enable_breakpoint( bpt ); |
| 148 | } |
| 149 | } |
| 150 | |
| 151 | int lookup_breakpoint( uint32 address, uint32 size, uint32 flags) |
| 152 | { |
| 153 | int i; |
| 154 | uint64 endaddr = ((uint64)address) + ((uint64)size) - 1; |
| 155 | |
| 156 | for( i=0; i < g_NumBreakpoints; i++) |
| 157 | { |
| 158 | if((g_Breakpoints[i].flags & flags) == flags) |
| 159 | { |
| 160 | if(g_Breakpoints[i].endaddr < g_Breakpoints[i].address) |
| 161 | { |
| 162 | if((endaddr >= g_Breakpoints[i].address) || |
| 163 | (address <= g_Breakpoints[i].endaddr)) |
| 164 | return i; |
| 165 | } |
| 166 | else // endaddr >= address |
| 167 | { |
| 168 | if((endaddr >= g_Breakpoints[i].address) && |
| 169 | (address <= g_Breakpoints[i].endaddr)) |
| 170 | return i; |
| 171 | } |
| 172 | } |
| 173 | } |
| 174 | return -1; |
| 175 | } |
| 176 | |
| 177 | int check_breakpoints( uint32 address ) |
| 178 | { |
| 179 | return lookup_breakpoint( address, 1, BPT_FLAG_ENABLED | BPT_FLAG_EXEC ); |
| 180 | } |
| 181 | |
| 182 | |
| 183 | int check_breakpoints_on_mem_access( uint32 pc, uint32 address, uint32 size, uint32 flags ) |
| 184 | { |
| 185 | //This function handles memory read/write breakpoints. size specifies the address |
| 186 | //range to check, flags specifies the flags that all need to be set. |
| 187 | //It automatically stops and updates the debugger on hit, so the memory access |
| 188 | //functions only need to call it and can discard the result. |
| 189 | int bpt; |
| 190 | if(run == 2) |
| 191 | { |
| 192 | bpt=lookup_breakpoint( address, size, flags ); |
| 193 | if(bpt != -1) |
| 194 | { |
| 195 | if(BPT_CHECK_FLAG(g_Breakpoints[bpt], BPT_FLAG_LOG)) |
| 196 | log_breakpoint(pc, flags, address); |
| 197 | |
| 198 | run = 0; |
| 199 | update_debugger(pc); |
| 200 | |
| 201 | return bpt; |
| 202 | } |
| 203 | } |
| 204 | return -1; |
| 205 | } |
| 206 | |
| 207 | int log_breakpoint(uint32 PC, uint32 Flag, uint32 Access) |
| 208 | { |
| 209 | char msg[32]; |
| 210 | |
| 211 | if(Flag & BPT_FLAG_READ) sprintf(msg, "0x%08X read 0x%08X", PC, Access); |
| 212 | else if(Flag & BPT_FLAG_WRITE) sprintf(msg, "0x%08X wrote 0x%08X", PC, Access); |
| 213 | else sprintf(msg, "0x%08X executed", PC); |
| 214 | DebugMessage(M64MSG_INFO, "BPT: %s", msg); |
| 215 | return 0; |
| 216 | } |
| 217 | |