gotls:get ret_len by register in go >1.17

[alahaiyo]

修复了gotls获取到的ret_len不正确问题

fix: #618

[cfc4n]

Could you provide some information on the changes in register passing parameters for Go version 1.7?

[alahaiyo]

Could you provide some information on the changes in register passing parameters for Go version 1.7?

golang/go#40724

[cfc4n]

感谢回复。

不过，我没有找到关于返回值在寄存器内的参数顺序变更的描述，能否给出相关描述？

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Thank you for your response. However, I couldn't find any description regarding the change in the order of parameters within the 'return value' register. Could you provide a relevant description?

[alahaiyo]

感谢回复。

不过，我没有找到关于返回值在寄存器内的参数顺序变更的描述，能否给出相关描述？

Thank you for your response. However, I couldn't find any description regarding the change in the order of parameters within the 'return value' register. Could you provide a relevant description?感谢您的回复。但是，我找不到任何关于“返回值”寄存器中参数顺序变化的描述。您能否提供相关描述？

Oh, I apologize. The specific ABI specification can be found in this document: https://go.googlesource.com/go/+/refs/heads/dev.regabi/src/cmd/compile/internal-abi.md
In our scenario, the first return value of the function is stored in the register RAX. I called your function go_get_argument_by_reg.

[cfc4n]

Sorry, I’ve been a little busy recently. I‘ll review it later.

[cfc4n]

The implementation here indeed has issues; it should utilize the encapsulated function go_get_argument instead of go_get_argument_by_stack.

I plan to release a new version soon, and I guess you should be on vacation. So I will submit a new PR, thank you for your feedback.

[cfc4n]

The new PR #646 has been merged. Thanks.