I need to pause execution when any register contains a specific value. I'd also like to know if it's possible to pause when a specific string of data is written to the stack.

OllyDbg help file -> Breakpoints -> Conditional Breakpoint

In other words, RTFM.

Forums like this exist for people to share information they got from the manual. Don't abuse the RTFM acronym.

My question regarding the register condition is if I can specify any and all registers. I was not able to find that in the help file. Hence why I made the post...

Conditional BPs can be easy.

This is thanks to the program made by L. Spiro, his program can be found at this link: http://www.memoryhacking.com

The debugger is in the tools menu, there is a 'conditions' button, if you click that button it will bring up the conditions editor.

? you want ollydbg to stop if eax or ecx or edx or esp or ###
contains lets says 12345678 ??

give it a condition like

ECX == 0x12ffb0 || EBP== 0x12ffb0 || REG == same constant || another reg == Same Constant

i would have liked it easier like specifiying r32 == SOME CONST

but ollydbg wont like genreal specification
Log data, item 301
Address=00401031
Message=Conditional breakpoint at win.00401031: Undefined registers not allowed in expression


as to string in stack you can check it with some thing like

string [[esp+0x60]]

it will stop if there is a string in starting at specified address

Log data, item 22
Address=0040103E
Message=Conditional breakpoint at win.0040103E: "D:\Borland\odbg110\win.exe"

About the registers thing, that's what I was wondering. If you could specify all registers with one token or if you had to specify them all in manually.

About the string in stack. Thanks, that's perfect.