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yoyoyip
Cheater
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Joined: 09 Apr 2006
Posts: 29
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 Posted: Tue Oct 31, 2006 7:22 am Post subject: AA failed to assemble 'movzx eax,word ptr [ebp+4]' |
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Hi DarkByte,
| Code: | | movzx eax,word ptr [ebp+4] |
the code byte turn out to be
0F 00 45 04 sldt [ebp+4] <<< assemble wrongly
the correct code byte supposed to be
0F B7 45 04 movzx eax,word ptr [ebp+4]
but
| Code: | | movsx eax,word ptr [ebp+4] |
will assemble correctly
0F BF 45 04 movsx eax,word ptr [ebp+4]
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Dark Byte
Site Admin
 Reputation: 474
Joined: 09 May 2003
Posts: 25958
Location: The netherlands
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| Posted: Tue Oct 31, 2006 7:38 am Post subject: |
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doh
| Code: |
(mnemonic:'MOVSX';opcode1:eo_reg;paramtype1:par_r16;paramtype2:par_rm8;bytes:3;bt1:$66;bt2:$0f;bt3:$be),
(mnemonic:'MOVSX';opcode1:eo_reg;paramtype1:par_r32;paramtype2:par_rm8;bytes:2;bt1:$0f;bt2:$be),
(mnemonic:'MOVSX';opcode1:eo_reg;paramtype1:par_r32;paramtype2:par_rm16;bytes:2;bt1:$0f;bt2:$bf),
(mnemonic:'MOVZX';opcode1:eo_reg;paramtype1:par_r16;paramtype2:par_rm8;bytes:3;bt1:$66;bt2:$0f;bt3:$b6),
(mnemonic:'MOVZX';opcode1:eo_reg;paramtype1:par_r32;paramtype2:par_rm8;bytes:2;bt1:$0f;bt2:$b6),
(mnemonic:'MOVZX';opcode1:eo_reg;paramtype1:par_r32;paramtype2:par_rm16;bytes:2;bt1:$0f;bt3:$b7),
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guess what is wrong. (hint , 3 -> 2)
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