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9206efaabe
The dynamic loader was mistakenly assuming that there are only two types of program load headers: text (RX) and data (RW). Now that we're linking with `-z separate-code`, we will also get some read-onlydata (R) segments. These can be memory-mapped directly without making a private per-process copy. To solve this, the code now instead separates the headers into map/copy instead of text/data. Writable segments get copied, while non-writable segments get memory-mapped. :^)