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