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Rev | Author | Line No. | Line |
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431 | serge | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;; |
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4 | ;; Distributed under terms of the GNU General Public License ;; |
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5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | |||
593 | mikedld | 8 | $Revision: 593 $ |
9 | |||
10 | |||
40 | halyavin | 11 | ; diamond, 2006 |
12 | sys_debug_services: |
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66 | diamond | 13 | cmp eax, 9 |
40 | halyavin | 14 | ja @f |
15 | jmp dword [sys_debug_services_table+eax*4] |
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16 | @@: ret |
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17 | sys_debug_services_table: |
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18 | dd debug_set_event_data |
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19 | dd debug_getcontext |
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20 | dd debug_setcontext |
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21 | dd debug_detach |
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22 | dd debug_suspend |
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23 | dd debug_resume |
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24 | dd debug_read_process_memory |
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25 | dd debug_write_process_memory |
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26 | dd debug_terminate |
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66 | diamond | 27 | dd debug_set_drx |
40 | halyavin | 28 | |
29 | debug_set_event_data: |
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30 | ; in: ebx = pointer |
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31 | ; destroys eax |
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465 | serge | 32 | mov eax, [current_slot] |
33 | mov [eax+APPDATA.dbg_event_mem], ebx |
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40 | halyavin | 34 | ret |
35 | |||
36 | get_debuggee_slot: |
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37 | ; in: ebx=PID |
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38 | ; out: CF=1 if error |
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39 | ; CF=0 and eax=slot*0x20 if ok |
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40 | ; out: interrupts disabled |
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41 | cli |
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42 | mov eax, ebx |
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43 | call pid_to_slot |
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44 | test eax, eax |
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45 | jz .ret_bad |
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46 | shl eax, 5 |
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47 | push ebx |
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379 | serge | 48 | mov ebx, [CURRENT_TASK] |
380 | serge | 49 | cmp [SLOT_BASE+eax*8+APPDATA.debugger_slot], ebx |
40 | halyavin | 50 | pop ebx |
51 | jnz .ret_bad |
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52 | ; clc ; automatically |
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53 | ret |
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54 | .ret_bad: |
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55 | stc |
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56 | ret |
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57 | |||
58 | debug_detach: |
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59 | ; in: ebx=pid |
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60 | ; destroys eax,ebx |
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61 | call get_debuggee_slot |
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62 | jc .ret |
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380 | serge | 63 | and dword [eax*8+SLOT_BASE+APPDATA.debugger_slot], 0 |
40 | halyavin | 64 | call do_resume |
65 | .ret: |
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66 | sti |
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67 | ret |
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68 | |||
69 | debug_terminate: |
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70 | ; in: ebx=pid |
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71 | call get_debuggee_slot |
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72 | jc debug_detach.ret |
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73 | mov ebx, eax |
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74 | shr ebx, 5 |
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75 | push 2 |
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76 | pop eax |
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77 | jmp sys_system |
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78 | |||
79 | debug_suspend: |
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80 | ; in: ebx=pid |
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81 | ; destroys eax,ebx |
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82 | call get_debuggee_slot |
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83 | jc .ret |
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379 | serge | 84 | mov bl, [CURRENT_TASK+eax+TASKDATA.state] ; process state |
40 | halyavin | 85 | test bl, bl |
86 | jz .1 |
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87 | cmp bl, 5 |
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88 | jnz .ret |
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89 | mov bl, 2 |
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379 | serge | 90 | .2: mov [CURRENT_TASK+eax+TASKDATA.state], bl |
40 | halyavin | 91 | .ret: |
92 | sti |
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93 | ret |
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94 | .1: |
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95 | inc ebx |
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96 | jmp .2 |
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97 | |||
98 | do_resume: |
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379 | serge | 99 | mov bl, [CURRENT_TASK+eax+TASKDATA.state] |
40 | halyavin | 100 | cmp bl, 1 |
101 | jz .1 |
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102 | cmp bl, 2 |
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103 | jnz .ret |
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104 | mov bl, 5 |
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379 | serge | 105 | .2: mov [CURRENT_TASK+eax+TASKDATA.state], bl |
40 | halyavin | 106 | .ret: ret |
107 | .1: dec ebx |
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108 | jmp .2 |
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109 | |||
110 | debug_resume: |
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111 | ; in: ebx=pid |
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112 | ; destroys eax,ebx |
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113 | call get_debuggee_slot |
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114 | jc .ret |
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115 | call do_resume |
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116 | .ret: sti |
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117 | ret |
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118 | |||
119 | debug_getcontext: |
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120 | ; in: |
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121 | ; ebx=pid |
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122 | ; ecx=sizeof(CONTEXT) |
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123 | ; edx->CONTEXT |
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124 | ; destroys eax,ecx,edx,esi,edi |
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125 | cmp ecx, 28h |
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126 | jnz .ret |
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127 | push ebx |
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128 | mov ebx, edx |
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129 | call check_region |
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130 | pop ebx |
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131 | dec eax |
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132 | jnz .ret |
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133 | call get_debuggee_slot |
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134 | jc .ret |
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465 | serge | 135 | mov eax, [eax*8+SLOT_BASE+APPDATA.pl0_stack] |
136 | lea esi, [eax+RING0_STACK_SIZE] |
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137 | mov edi, edx |
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40 | halyavin | 138 | .ring0: |
139 | ; note that following code assumes that all interrupt/exception handlers |
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465 | serge | 140 | ; saves ring-3 context by pushad in this order |
141 | ; top of ring0 stack: ring3 stack ptr (ss+esp), iret data (cs+eip+eflags), pushad |
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142 | sub esi, 8+12+20h |
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143 | lodsd ;edi |
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40 | halyavin | 144 | mov [edi+24h], eax |
465 | serge | 145 | lodsd ;esi |
40 | halyavin | 146 | mov [edi+20h], eax |
465 | serge | 147 | lodsd ; ebp |
40 | halyavin | 148 | mov [edi+1Ch], eax |
465 | serge | 149 | lodsd ;esp |
150 | lodsd ;ebx |
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40 | halyavin | 151 | mov [edi+14h], eax |
465 | serge | 152 | lodsd ;edx |
40 | halyavin | 153 | mov [edi+10h], eax |
465 | serge | 154 | lodsd ;ecx |
40 | halyavin | 155 | mov [edi+0Ch], eax |
465 | serge | 156 | lodsd ;eax |
40 | halyavin | 157 | mov [edi+8], eax |
465 | serge | 158 | lodsd ;eip |
40 | halyavin | 159 | mov [edi], eax |
465 | serge | 160 | lodsd ;cs |
161 | lodsd ;eflags |
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40 | halyavin | 162 | mov [edi+4], eax |
465 | serge | 163 | lodsd ;esp |
40 | halyavin | 164 | mov [edi+18h], eax |
165 | .ret: |
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166 | sti |
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167 | ret |
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168 | |||
169 | debug_setcontext: |
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170 | ; in: |
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171 | ; ebx=pid |
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172 | ; ecx=sizeof(CONTEXT) |
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173 | ; edx->CONTEXT |
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174 | ; destroys eax,ecx,edx,esi,edi |
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175 | cmp ecx, 28h |
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176 | jnz .ret |
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177 | push ebx |
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178 | mov ebx, edx |
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179 | call check_region |
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180 | pop ebx |
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181 | dec eax |
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182 | jnz .ret |
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183 | call get_debuggee_slot |
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184 | jc .stiret |
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465 | serge | 185 | mov eax, [eax*8+SLOT_BASE+APPDATA.pl0_stack] |
186 | lea edi, [eax+RING0_STACK_SIZE] |
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187 | mov esi, edx |
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40 | halyavin | 188 | .ring0: |
465 | serge | 189 | sub edi, 8+12+20h |
190 | mov eax, [esi+24h] ;edi |
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40 | halyavin | 191 | stosd |
465 | serge | 192 | mov eax, [esi+20h] ;esi |
40 | halyavin | 193 | stosd |
465 | serge | 194 | mov eax, [esi+1Ch] ;ebp |
40 | halyavin | 195 | stosd |
465 | serge | 196 | scasd |
197 | mov eax, [esi+14h] ;ebx |
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40 | halyavin | 198 | stosd |
465 | serge | 199 | mov eax, [esi+10h] ;edx |
40 | halyavin | 200 | stosd |
465 | serge | 201 | mov eax, [esi+0Ch] ;ecx |
40 | halyavin | 202 | stosd |
465 | serge | 203 | mov eax, [esi+8] ;eax |
40 | halyavin | 204 | stosd |
465 | serge | 205 | mov eax, [esi] ;eip |
40 | halyavin | 206 | stosd |
207 | scasd |
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465 | serge | 208 | mov eax, [esi+4] ;eflags |
40 | halyavin | 209 | stosd |
465 | serge | 210 | mov eax, [esi+18h] ;esp |
40 | halyavin | 211 | stosd |
212 | .stiret: |
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213 | sti |
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214 | .ret: |
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215 | ret |
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216 | |||
66 | diamond | 217 | debug_set_drx: |
218 | call get_debuggee_slot |
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219 | jc .errret |
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220 | mov ebp, eax |
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380 | serge | 221 | lea eax, [eax*8+SLOT_BASE+APPDATA.dbg_regs] |
66 | diamond | 222 | ; [eax]=dr0, [eax+4]=dr1, [eax+8]=dr2, [eax+C]=dr3 |
223 | ; [eax+10]=dr7 |
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465 | serge | 224 | cmp edx, OS_BASE |
225 | jae .errret |
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66 | diamond | 226 | cmp cl, 3 |
227 | ja .errret |
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228 | mov ebx, dr7 |
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229 | shr ebx, cl |
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230 | shr ebx, cl |
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231 | test ebx, 2 ; bit 1+2*index = G0..G3, global break enable |
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232 | jnz .errret2 |
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233 | test ch, ch |
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234 | jns .new |
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235 | ; clear breakpoint |
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236 | movzx ecx, cl |
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237 | add ecx, ecx |
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238 | and dword [eax+ecx*2], 0 ; clear DR |
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239 | btr dword [eax+10h], ecx ; clear L bit |
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240 | test byte [eax+10h], 55h |
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241 | jnz .okret |
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465 | serge | 242 | ; imul eax, ebp, tss_step/32 |
243 | ; and byte [eax + tss_data + TSS._trap], not 1 |
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244 | and [ebp*8 + SLOT_BASE+APPDATA.dbg_state], not 1 |
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66 | diamond | 245 | .okret: |
246 | and dword [esp+36], 0 |
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247 | sti |
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248 | ret |
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249 | .errret: |
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250 | sti |
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251 | mov dword [esp+36], 1 |
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252 | ret |
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253 | .errret2: |
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254 | sti |
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255 | mov dword [esp+36], 2 |
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256 | ret |
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257 | .new: |
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258 | ; add new breakpoint |
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259 | ; cl=index; ch=flags; edx=address |
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260 | test ch, 0xF0 |
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261 | jnz .errret |
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262 | mov bl, ch |
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263 | and bl, 3 |
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264 | cmp bl, 2 |
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265 | jz .errret |
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266 | mov bl, ch |
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267 | shr bl, 2 |
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268 | cmp bl, 2 |
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269 | jz .errret |
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270 | test dl, bl |
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271 | jnz .errret |
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272 | or byte [eax+10h+1], 3 ; set GE and LE flags |
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273 | movzx ebx, ch |
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274 | movzx ecx, cl |
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275 | add ecx, ecx |
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276 | bts dword [eax+10h], ecx ; set L flag |
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277 | add ecx, ecx |
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278 | mov [eax+ecx], edx ; set DR |
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279 | shl ebx, cl |
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280 | mov edx, 0xF |
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281 | shl edx, cl |
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282 | not edx |
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283 | and [eax+10h+2], dx |
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284 | or [eax+10h+2], bx ; set R/W and LEN fields |
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465 | serge | 285 | ; imul eax, ebp, tss_step/32 |
286 | ; or byte [eax + tss_data + TSS._trap], 1 |
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287 | or [ebp*8 + SLOT_BASE+APPDATA.dbg_state], 1 |
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66 | diamond | 288 | jmp .okret |
289 | |||
40 | halyavin | 290 | debug_read_process_memory: |
291 | ; in: |
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292 | ; ebx=pid |
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293 | ; ecx=length |
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294 | ; esi->buffer in debugger |
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295 | ; edx=address in debuggee |
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44 | halyavin | 296 | ; out: [esp+36]=sizeof(read) |
40 | halyavin | 297 | ; destroys all |
298 | push ebx |
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299 | mov ebx, esi |
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300 | call check_region |
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301 | pop ebx |
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302 | dec eax |
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44 | halyavin | 303 | jnz .err |
40 | halyavin | 304 | call get_debuggee_slot |
44 | halyavin | 305 | jc .err |
306 | shr eax, 5 |
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40 | halyavin | 307 | mov ebx, esi |
308 | call read_process_memory |
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309 | sti |
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44 | halyavin | 310 | mov dword [esp+36], eax |
40 | halyavin | 311 | ret |
44 | halyavin | 312 | .err: |
313 | or dword [esp+36], -1 |
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314 | ret |
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40 | halyavin | 315 | |
316 | debug_write_process_memory: |
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317 | ; in: |
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318 | ; ebx=pid |
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319 | ; ecx=length |
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320 | ; esi->buffer in debugger |
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321 | ; edx=address in debuggee |
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44 | halyavin | 322 | ; out: [esp+36]=sizeof(write) |
40 | halyavin | 323 | ; destroys all |
324 | push ebx |
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325 | mov ebx, esi |
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326 | call check_region |
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327 | pop ebx |
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328 | dec eax |
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44 | halyavin | 329 | jnz debug_read_process_memory.err |
40 | halyavin | 330 | call get_debuggee_slot |
44 | halyavin | 331 | jc debug_read_process_memory.err |
332 | shr eax, 5 |
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40 | halyavin | 333 | mov ebx, esi |
334 | call write_process_memory |
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335 | sti |
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44 | halyavin | 336 | mov [esp+36], eax |
40 | halyavin | 337 | ret |
338 | |||
339 | debugger_notify: |
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340 | ; in: eax=debugger slot |
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341 | ; ecx=size of debug message |
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342 | ; [esp+4]..[esp+4+ecx]=message |
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343 | ; interrupts must be disabled! |
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344 | ; destroys all general registers |
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345 | ; interrupts remain disabled |
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66 | diamond | 346 | xchg ebp, eax |
63 | halyavin | 347 | mov edi, [timer_ticks] |
348 | add edi, 500 ; 5 sec timeout |
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40 | halyavin | 349 | .1: |
66 | diamond | 350 | mov eax, ebp |
351 | shl eax, 8 |
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380 | serge | 352 | mov edx, [SLOT_BASE+eax+APPDATA.dbg_event_mem] |
40 | halyavin | 353 | test edx, edx |
354 | jz .ret |
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355 | ; read buffer header |
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356 | push ecx |
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357 | push eax |
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358 | push eax |
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359 | mov eax, ebp |
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360 | mov ebx, esp |
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361 | mov ecx, 8 |
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362 | call read_process_memory |
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363 | cmp eax, ecx |
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364 | jz @f |
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365 | add esp, 12 |
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366 | jmp .ret |
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367 | @@: |
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368 | cmp dword [ebx], 0 |
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369 | jg @f |
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370 | .2: |
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371 | pop ecx |
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372 | pop ecx |
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373 | pop ecx |
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379 | serge | 374 | cmp dword [CURRENT_TASK], 1 |
66 | diamond | 375 | jnz .notos |
63 | halyavin | 376 | cmp [timer_ticks], edi |
377 | jae .ret |
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66 | diamond | 378 | .notos: |
40 | halyavin | 379 | sti |
380 | call change_task |
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381 | cli |
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382 | jmp .1 |
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383 | @@: |
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384 | mov ecx, [ebx+8] |
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385 | add ecx, [ebx+4] |
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386 | cmp ecx, [ebx] |
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387 | ja .2 |
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388 | ; advance buffer position |
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389 | push ecx |
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390 | mov ecx, 4 |
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391 | sub ebx, ecx |
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392 | mov eax, ebp |
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393 | add edx, ecx |
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394 | call write_process_memory |
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395 | pop eax |
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396 | ; write message |
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397 | mov eax, ebp |
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398 | add edx, ecx |
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399 | add edx, [ebx+8] |
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400 | add ebx, 20 |
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401 | pop ecx |
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402 | pop ecx |
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403 | pop ecx |
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404 | call write_process_memory |
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405 | ; new debug event |
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406 | mov eax, ebp |
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407 | shl eax, 8 |
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380 | serge | 408 | or byte [SLOT_BASE+eax+APPDATA.event_mask+1], 1 ; set flag 100h |
40 | halyavin | 409 | .ret: |
410 | ret |
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66 | diamond | 411 | |
412 | debug_exc: |
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413 | ; int 1 = #DB |
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414 | save_ring3_context |
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113 | diamond | 415 | cld |
465 | serge | 416 | mov ax, app_data ;os_data |
66 | diamond | 417 | mov ds, ax |
418 | mov es, ax |
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419 | mov eax, dr6 |
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420 | push eax |
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421 | xor eax, eax |
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422 | mov dr6, eax |
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423 | ; test if debugging |
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424 | cli |
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465 | serge | 425 | mov eax, [current_slot] |
426 | mov eax, [eax+APPDATA.debugger_slot] |
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66 | diamond | 427 | test eax, eax |
428 | jnz .debug |
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429 | sti |
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430 | ; not debuggee => say error and terminate |
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465 | serge | 431 | add esp, 0x20+4 |
66 | diamond | 432 | mov [error_interrupt], 1 |
433 | call show_error_parameters |
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379 | serge | 434 | mov edx, [TASK_BASE] |
115 | poddubny | 435 | mov byte [edx+TASKDATA.state], 4 |
66 | diamond | 436 | jmp change_task |
437 | .debug: |
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438 | ; we are debugged process, notify debugger and suspend ourself |
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439 | ; eax=debugger PID |
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440 | pop edx |
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441 | mov ebx, dr7 |
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442 | mov cl, not 1 |
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443 | .l1: |
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444 | test bl, 1 |
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445 | jnz @f |
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446 | and dl, cl |
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447 | @@: |
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448 | shr ebx, 2 |
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449 | add cl, cl |
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450 | inc ecx |
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451 | cmp cl, not 10h |
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452 | jnz .l1 |
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453 | push edx ; DR6 image |
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379 | serge | 454 | mov ecx, [TASK_BASE] |
115 | poddubny | 455 | push dword [ecx+TASKDATA.pid] ; PID |
66 | diamond | 456 | push 12 |
457 | pop ecx |
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458 | push 3 ; 3 = debug exception |
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459 | call debugger_notify |
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460 | pop ecx |
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461 | pop ecx |
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462 | pop ecx |
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379 | serge | 463 | mov edx, [TASK_BASE] |
115 | poddubny | 464 | mov byte [edx+TASKDATA.state], 1 ; suspended |
66 | diamond | 465 | call change_task |
466 | restore_ring3_context |
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467 | iretd |