Both ways are fine, but the second is a little more conventional.
The rule is this: when a compiler generates code to call a function, it assumes that the contents of ebx will be the same after the call as before. In your program, the only situation where that applies is to the startup code which calls
main. For both versions of your code,
ebx has the same value when
main returns as when it was entered, so all is well.
If you had a C function in your program which called
main function, and you know that
ebx and you are taking appropriate action to save and restore it, so that’s fine.
To put it another way, in the first version of the code,
CLICK HERE to find out more related problems solutions.