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•Created by Marvee Amasi on 8/8/2024 in #middleware-and-os
Why Does Piping Output to Hexdump Fail for My Assembly printf Function?
@Marvee Amasi The issue you're encountering is due to the buffering behavior of the standard
output stream (stdout). In C, the standard library handles the buffering of stdout, which ensures that the buffer is flushed when the program exits or when the buffer is full. However, when you implement printf in assembly, you're bypassing these standard library mechanisms, which can lead to different behavior, especially when piping the output.
To make sure that your assembly implementation behaves consistently, you need to explicitly flush the stdout buffer. You can achieve this by using a write system call directly instead of relying on the C printf function.4 replies