The function code itself is in the text segment. The variables for a particular invocation of the function are on the stack. Padding out the function with NOP creates space within the function, which I'm using as a variable. Basically I'm interpreting the "working memory" part of the post to mean "variables allocated on the stack". Now that I think of it, what I'm doing is basically a static variable, which (according to the link) C puts in the initialized data segment if you do it the right way, but then it would legitimately be a variable so I'd lose.
It's probably not a legit way to do things (and might be impossible if the text segment is read-only as the link says it might be), but people had already posted the legit ways.
Thanks for that explanation. It's been a while since I've written C/C++, but this approach makes sense. I love the thought process of cleverly using that available memory, even if it doesn't work out. 👏👏👏
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C memory layout:
The function code itself is in the
textsegment. The variables for a particular invocation of the function are on the stack. Padding out the function withNOPcreates space within the function, which I'm using as a variable. Basically I'm interpreting the "working memory" part of the post to mean "variables allocated on the stack". Now that I think of it, what I'm doing is basically a static variable, which (according to the link) C puts in theinitialized datasegment if you do it the right way, but then it would legitimately be a variable so I'd lose.It's probably not a legit way to do things (and might be impossible if the text segment is read-only as the link says it might be), but people had already posted the legit ways.
Thanks for that explanation. It's been a while since I've written C/C++, but this approach makes sense. I love the thought process of cleverly using that available memory, even if it doesn't work out. 👏👏👏