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how to reserve N bytes for dynamic string / array ?

 
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peddroelm
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Joined: 03 Oct 2014
Posts: 84
PostPosted: Thu Jan 12, 2023 12:03 pm    Post subject: how to reserve N bytes for dynamic string / array ? Reply with quote
Code:
label(myBigString)
registerSymbol(myBigString)


newmem:

bytes_save:
  readmem(AOB_LOG_f_ActiveTalentListOnUrbanZoneLand,5)

myBigString:
db [100]   cannot be compiled

db 'init string',0
[b]myBigString+100:[/b] ??   would this do it ?

code:


...
jmp code  // instead of jmp newmem


the string is built in a lua function and then the address passed as parameter for asm function call .. But if I don't reserve enough bytes the string will overwrite code:

myBigString+100: // ADDRESS NOT VALID
db 0
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ParkourPenguin
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Posts: 4289
PostPosted: Thu Jan 12, 2023 12:17 pm    Post subject: Reply with quote
`resb` pseudoinstruction. Don't use it in tandem with db: what you're trying to do in that first post would reserve 0x10C bytes, and the 'init string' would be written at myBigString+100.

Or just put the data after the code.

Code:
newmem:
code:
  // ...
bytes_save:
  readmem(...)
myBigString:
  db 'whatever',0
  // rest of newmem is reserved for myBigString

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