如何在LLDB中写入XMM寄存器 [英] How to write into XMM Registers in LLDB

问题描述

我正在尝试使用LLDB API从python中的寄存器读取和写入值.对于通用寄存器，我一直使用 frame.register ['register name'].value 读取和写入寄存器值，这对我来说是成功的.

I am trying to read and write values from registers in python using the LLDB API. For the General Purpose Registers, I have been using the frame.register['register name'].value to read and write register values, which works successfully for me.

但是，当我接近浮点寄存器时，我发现无法再这样做了，因为某些寄存器(例如XMM寄存器)没有 value 属性例如， frame.register ['xmm0'].value 将返回 None .

However, as I approach the Floating Point Registers, I found that this could not be done anymore, as some of the registers, such as the XMM registers do not have a value attribute e.g frame.register['xmm0'].value would return None.

我查看了LLDB API文档，尽管它没有返回字符串格式，但是我可以通过 frame.register ['xmm0'].GetData()获得寄存器值.例如 value 属性.但是，我仍然找不到使用LLDB API写入寄存器的方法.我了解我可以使用 register write xmm0"{0x00 0x01 ... 0x0f}" 在CLI中以交互方式执行此操作，如下所示 https://www.mail-archive.com/[e-mail]/msg03228.html ，但是我希望能够在python中做到这一点，因为我正在编写脚本来执行此任务.

I have looked into the LLDB API Documentation and I could somehow get the register value using the frame.register['xmm0'].GetData(), although it doesn't return a string format like the value attribute. However, I am still unable to find a way to write into the registers using the LLDB API. I understand that I would be able to do this interactively in CLI using register write xmm0 "{0x00 0x01 ... 0x0f}", as shown in https://www.mail-archive.com/[e-mail]/msg03228.html, but I would like to be able to do it in python, as I am writing a script in order to perform this task.

那么，有没有办法让我使用LLDB API写入XMM寄存器或一般的矢量类型寄存器?

So, is there a way for me to write into the XMM registers, or in general, vector type registers using LLDB API?

推荐答案

几天后，我终于设法使用LLDB API读写向量寄存器.XMM寄存器具有属性 summary ，也可以使用 SBValue.GetSummary()获得该属性，该属性以以下形式返回XMM寄存器内的值的字符串:(0x00 0x01 .... 0x0f)字符串格式.

After a few days, I finally managed to read and write into the vector registers using the LLDB API. The XMM Registers has an attribute summary, which can also be obtained using SBValue.GetSummary(), this attribute returns a string of the values inside the XMM register in the form of (0x00 0x01 .... 0x0f) string format.

要修改XMM寄存器，因为XMM寄存器不具有属性 value ，所以 lldb.frame.register ['register name'].value 将是无用的，但是还有一种使用 lldb.frame.registers [0] .GetChildMemberWithName('xmm0').SetValueFromCString(value，self.error)更新寄存器值的方法.值对象必须是字符串格式，仍然遵循"{0x00 0x01 ... 0x0f}" 格式.

To modify the XMM Registers, since the XMM registers have no attribute value, lldb.frame.register['register name'].value would be useless , but there is another way to update registers value, using lldb.frame.registers[0].GetChildMemberWithName('xmm0').SetValueFromCString(value, self.error). The value object has to be a string format, still following the "{0x00 0x01 ... 0x0f}" format.

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