CLEO Help Question about 0C11

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monday

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http://www.cplusplus.com/reference/cstring/memset/
it has 3 input parameters: destination, value and size. So you can do the following:

Code: 
DEST_PLUS_SIZE = DEST + SIZE
for 0@ = DEST to DEST_PLUS_SIZE
write_mem pointer 0@ value VALUE size 1
end


Alternatively (does the same thing):

Code: 
1@ = DEST
for 0@ = 0 to SIZE
write_mem pointer 1@ value VALUE size 1
1@ += 1
end
 
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Parazitas

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monday said:
http://www.cplusplus.com/reference/cstring/memset/
it has 3 input parameters: destination, value and size. So you can do the following:

Code: 
DEST_PLUS_SIZE = DEST + SIZE
for 0@ = DEST to DEST_PLUS_SIZE
write_mem pointer 0@ value VALUE size 1
end


Alternatively (does the same thing):

Code: 
1@ = DEST
for 0@ = 0 to SIZE
1@ += 1
write_mem pointer 1@ value VALUE size 1
end
Click to expand...

Okay i try it , thx.
 
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Parazitas

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monday said:
just edited that post, 1@ should be increased after write_mem, my bad
Click to expand...
Maybe you know what's wrong?
Tested both.
PHP: 
:memset

var
0@ : integer
1@ : integer
2@ : integer
end

// 0@ - destination, 1@ - value, 2@ - size
// Example: 0AB1: @memset destination 0@ value 32 size 1

for 3@ = 0 to 2@
0A8C: write_memory 0@ size 1 value 1@ virtual_protect 0
1@ += 1
end

0AB2: ret 0
PHP: 
:memset

var
0@ : integer
1@ : integer
2@ : integer
3@ : integer
4@ : integer
end

// 0@ - destination, 1@ - value, 2@ - size
// Example: 0AB1: @memset destination 0@ value 32 size 1 

0A8E: 4@ = 0@ + 2@ // int
for 3@ = 0@ to 4@
0A8C: write_memory 0@ size 1 value 1@ virtual_protect 0
end

0AB2: ret 0
 
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monday

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In the first example you're adding to value instead of a pointer, so youre overwriting the same byte with different values repetitively
In the second example you're writing to 0@ instead of 3@, so you're overwriting the same byte repetitively

If all you want to do is to reset all bytes to 0, then you could try:
0A8C: write_memory 0@ size 100000 value 0 virtual_protect 0
 
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Parazitas

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monday said:
In the first example you're adding to value instead of a pointer, so youre overwriting the same byte with different values repetitively
In the second example you're writing to 0@ instead of 3@, so you're overwriting the same byte repetitively

If all you want to do is to reset all bytes to 0, then you could try:
0A8C: write_memory 0@ size 100000 value 0 virtual_protect 0
Click to expand...
Thanks for answer.
In the first example - i changed from 1@ += 1 to 0@ += 1 and i still get crash
In the second example - i changed write mem from 0@ to 3@ and i still get crash , sadly..
All i want is just make it work properly.
 
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Parazitas

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monday said:
can you post the full code that crashes?
Click to expand...
I just changing sampfuncs opcode to this snippets, that's help work without sampfuncs.
Code works perfect with sampfuncs opcode.
PHP: 
{$CLEO .cs}

0000:

REPEAT
WAIT 0
UNTIL 0AFA:

WHILE TRUE
WAIT 0

call @GetNameFromFile_2206 0 2@
chatmsg "%s" -1 2@

END

:GetNameFromFile_2206
if
1@ = File.Open("CLEO\admin.txt", "rt")
jf @GetNameFromFile_2473
alloc 2@ 64
alloc 3@ 20000
0C11: memset destination 3@ value 0 size 20000 
0085: 4@ = 3@ // (int)
0C11: memset destination 3@ value 32 size 1 
3@ += 1

:GetNameFromFile_2296
if
File.ReadString(1@, 2@, 60)
jf @GetNameFromFile_2360
0C17: 5@ = strlen 2@
call @GetNameFromFile_2483 2 2@ 5@
//0C10: memcpy destination 3@ source 2@ size 5@
0AB1: @memcpy 3 destination 3@ source 2@ size 5@
005A: 3@ += 5@ // (int)

:GetNameFromFile_2360
0C11: memset destination 2@ value 0 size 64  
   File.EOF(1@)
jf @GetNameFromFile_2296
free 2@
File.Close(1@)
0C11: memset destination 3@ value 32 size 1
0085: 3@ = 4@ // (int)
0C17: 5@ = strlen 3@
5@ += 1
alloc 6@ 5@
0C11: memset destination 6@ value 0 size 5@
0AB1: @memcpy 3 destination 6@ source 3@ size 5@
//0C10: memcpy destination 6@ source 3@ size 5@
4@ = 0
free 3@
return_true
goto @GetNameFromFile_2475

:GetNameFromFile_2473
return_false

:GetNameFromFile_2475
ret 1 6@

:GetNameFromFile_2483
1@ -= 1
005A: 0@ += 1@ // (int)
0A8D: 2@ = read_memory 0@ size 1 virtual_protect 0
if
  2@ == 10
jf @GetNameFromFile_2537
0C11: memset destination 0@ value 32 size 1
:GetNameFromFile_2537
0062: 0@ -= 1@ // (int)
ret 0

:memcpy

var
0@ : integer
1@ : integer
2@ : integer
3@ : integer
end

// 0@ - destination, 1@ - source, 2@ - size
// Example: 0AB1: @memcpy 3 destination 0@ source 1@ size 2@

dec(2@)
for 3@ = 0 to 2@
    0A8D: 4@ = read_memory 1@ size 1 virtual_protect 0
    0A8C: write_memory 0@ size 1 value 4@ virtual_protect 0
    1@ += 1
    0@ += 1
end

0AB2: ret 0

:memset

var
0@ : integer
1@ : integer
2@ : integer
3@ : integer
end

// 0@ - destination, 1@ - value, 2@ - size
// Example: 0AB1: @memset destination 0@ value 32 size 1

for 3@ = 0 to 2@
0A8C: write_memory 0@ size 1 value 1@ virtual_protect 0
0@ += 1
end
0AB2: ret 0
 
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monday

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my bad, it should be:

for 0@ = DEST to (DEST_PLUS_SIZE - 1)

or
for 0@ = 0 to (SIZE - 1)
 
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Parazitas

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monday said:
my bad, it should be:

for 0@ = DEST to (DEST_PLUS_SIZE - 1)

or
for 0@ = 0 to (SIZE - 1)
Click to expand...

still not work :/
PHP: 
:memset

var
0@ : integer
1@ : integer
2@ : integer
3@ : integer
end

// 0@ - destination, 1@ - value, 2@ - size
// Example: 0AB1: @memset destination 0@ value 32 size 1
2@ -= 1
for 3@ = 0 to 2@
0A8C: write_memory 0@ size 1 value 1@ virtual_protect 0
0@ += 1
end

0AB2: ret 0
 
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monday

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the code you posted doesn't have any calls to that memset function so it's hard to tell if that is the problem but the "Example" comment under the ":memset" label has mistake, it doesn't have the number of parameters

It should be this:
0AB1: @memset number_of_parameters 3 destination 0@ value 32 size 1

Instead of this:
0AB1: @memset destination 0@ value 32 size 1
 
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Parazitas

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monday said:
the code you posted doesn't have any calls to that memset function so it's hard to tell if that is the problem but the "Example" comment under the ":memset" label has mistake, it doesn't have the number of parameters

It should be this:
0AB1: @memset number_of_parameters 3 destination 0@ value 32 size 1

Instead of this:
0AB1: @memset destination 0@ value 32 size 1
Click to expand...
I know about opcode " 0AB1: " params and returns very good , but this time you are right i forgot put how many params i writing to snippet, now working.
Thanks, i appreciate your help.

Now can use everyone , fully working. Big Thanks Monday.
PHP: 
:memcpy

var
0@ : integer
1@ : integer
2@ : integer
3@ : integer
end

// 0@ - destination, 1@ - source, 2@ - size
// Example: 0AB1: @memcpy 3 destination 0@ source 1@ size 2@

dec(2@)
for 3@ = 0 to 2@
    0A8D: 4@ = read_memory 1@ size 1 virtual_protect 0
    0A8C: write_memory 0@ size 1 value 4@ virtual_protect 0
    1@ += 1
    0@ += 1
end

0AB2: ret 0
PHP: 
:memset

var
0@ : integer
1@ : integer
2@ : integer
3@ : integer
end

// 0@ - destination, 1@ - value, 2@ - size
// Example: 0AB1: @memset 3 destination 0@ value 32 size 1
2@ -= 1
for 3@ = 0 to 2@
0A8C: write_memory 0@ size 1 value 1@ virtual_protect 0
0@ += 1
end

0AB2: ret 0
 
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Parazitas

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C++: 
2@ = strlen 0@
3@ = strlen 1@
memcpy(0@ + 2@, 1@, 3@)
memset(0@ + 2@ + 3@, 0, 1) // null char

tested , works perfect.
PHP: 
:strcat

// 0@ - destination, 1@ - source
// Example: 0AB1: @strcat 2 destination 0@ source 1@

0AB1: @strlen 1 string 0@ _return: 2@
0AB1: @strlen 1 string 1@ _return: 3@
005A: 0@ += 2@  // (int)
0AB1: @memcpy 3 destination 0@ source 1@ size 3@
005A: 0@ += 3@  // (int)
0AB1: @memset 3 destination 0@ value 0 size 1
0AB2: ret 0

springfield said:
Also, all these functions(RtlFillMemory, strcat, strcpy etc.) are exported by ntdll, so u can use this tutorial, to make shorter and easier functions.
Click to expand...
I know only samp.dll call , i first time see ntdll i have no idea how it works.

monday
springfield
Thanks for help , now i can finally make more stuff with snippets.
 
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monday

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It sets each byte to have the same value.

If you have an array of bytes and you'd like to set all of the bytes to 0, you could create a loop like this:
Code: 
for ADDRESS = ARRAY_POINTER to END_OF_ARRAY_POINTER
    write 0 at ADDRESS
end

You can notice that it takes 3 lines of this pseudocode (and would take even more lines of code in CLEO). So to make it shorter and more readable we can use "memset" function (which is what 0C11 opcode implements).

You could check these for practical examples:
https://www.geeksforgeeks.org/memset-c-example/
https://www.youtube.com/results?search_query=memset
 
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