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TIL: Go not only passes all arguments via the stack on x86-64, it passes *return values* via the stack too. 😧

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All architectures right?

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I think so, but not sure.

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and

Yes, all.

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and

Is there a reason other than simplicity of the initial implementation?

12:06 AM · Apr 3, 2019Twitter Web Client

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Ah, I see twitter.com/bradfitz/statu.

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Brad Fitzpatrick

@bradfitz

Apr 2, 2019

Replying to @graydon_pub @pcwalton and @phenlix

Yes, that was the original reason and stuck. And that the traditional ABIs don't define multiple return values or as Go needed. That said, Go just started ABI versioning to explore changing it.