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mgr.inz.Player
I post too much
 Reputation: 222
Joined: 07 Nov 2008
Posts: 4438
Location: W kraju nad Wisla. UTC+01:00
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 Posted: Tue Nov 20, 2012 3:22 pm Post subject: writeBytes[solved] and Foundlist[solved] |
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Bugs:
- last element from LUA table is ignored - writeBytes(address,luaTable)
- and variable created just before writeBytes is overwritten.
| Code: | changeTo = {1,1,1,2}
local aobs = AOBScan(searchString)
if(aobs ~= nil) then
for i=0,(stringlist_getCount(aobs)-1) do
local address=stringlist_getString(aobs,i);
writeBytes('0x'..address ,changeTo)
end
object_destroy(aobs);
aobs=nil
end
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it writes 1, 1, 1. But it doesn't write '2'.
My first attempt to fix this, I used this code just after first writeBytes:
| Code: | | writeBytes('0x'..address+#changeTo-1,changeTo[#changeTo]) |
But is doesn't work. Variable address is overwritten with "written bytes" value. In above example, address variable will change to 3.
Full temporary fix needs one dummy variable and above final writeBytes which writes last element:
| Code: | changeTo = {1,1,1,2}
local aobs = AOBScan(searchString)
if(aobs ~= nil) then
for i=0,(stringlist_getCount(aobs)-1) do
local address=stringlist_getString(aobs,i);
local dummy=0
writeBytes('0x'..address ,changeTo)
writeBytes('0x'..address+#changeTo-1,changeTo[#changeTo])
end
object_destroy(aobs);
aobs=nil
end
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or
| Code: | (...)
writeBytes('0x'..address,changeTo,#changeTo)
writeBytes('0x'..address+#changeTo-1,changeTo[#changeTo])
(...) |
Summary
There are few ways to temporary fix this:
- first temporary fix (dummy is overwritten, second writeBytes doesn't use luatable ):
| Code: | local dummy=0
writeBytes('0x'..address,changeTo)
writeBytes('0x'..address+#changeTo-1,changeTo[#changeTo]) |
- second temporary fix (memory allocated for third param is overwritten, second writeBytes doesn't use luatable)
| Code: | writeBytes('0x'..address,changeTo,#changeTo)
writeBytes('0x'..address+#changeTo-1,changeTo[#changeTo]) |
- third temporary fix (add one extra element to table; it will be ignored)(fix not compatible with future fixed CE)
| Code: | table.insert(changeTo,'dummy')
writeBytes('0x'..address,changeTo) |
_________________
Last edited by mgr.inz.Player on Fri Nov 23, 2012 6:47 pm; edited 2 times in total |
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Dark Byte
Site Admin
 Reputation: 470
Joined: 09 May 2003
Posts: 25806
Location: The netherlands
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| Posted: Tue Nov 20, 2012 7:43 pm Post subject: |
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fixed in the svn and compatible with the third fix
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mgr.inz.Player
I post too much
Reputation: 222
Joined: 07 Nov 2008
Posts: 4438
Location: W kraju nad Wisla. UTC+01:00
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| Posted: Thu Nov 22, 2012 7:02 am Post subject: |
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OK, svn 1507 (compiled with Lazarus-1.1-39122-fpc-2.6.1-20121018-win32.exe):
1) writeBytes - fixed
2) searching unicode string, simple scan - bug, CE just hangs, or crash without error
(edit) the same for autoguessed unicode strings (dissect structure)
I tried under Lazarus debugger. I see "SIGSEGV", and I see
SYSTEM_UTF8TOUNICODE$PUNICODECHAR$LONGWORD$PCHAR$LONGWORD$$LONGWORD
or
SYSTEM_SYSGETMEM_FIXED$LONGWORD$$POINTER
Note:
In revision 1490 "unicode string scan" is OK
I think, something (changes made) from revision 1492 mess "string scan".
(Edit)This readAndParsePointer (byteinterpreter.pas) function causes SIGSEGV.
To be more specific, this:
getmem(ws, bytesize+2);
(its inside vtUnicodeString case)
3) foundlist - bug, we only see '???' for custom type scans
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mgr.inz.Player
I post too much
Reputation: 222
Joined: 07 Nov 2008
Posts: 4438
Location: W kraju nad Wisla. UTC+01:00
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| Posted: Fri Nov 23, 2012 8:53 am Post subject: |
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searching unicode string - fixed. Thanks.
Edit:
1) writeBytes - fixed
2) searching unicode string - fixed
3) foundlist for custom type scans - fixed
Thank you.
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