Re: [go-nuts] question about asm doc

[buaa . cch]

I also wonder if there are some official doc about this stack layout on 
amd64..

在 2018年4月18日星期三 UTC+8上午3:48:46，Ian Lance Taylor写道：
>
> On Tue, Apr 17, 2018 at 9:46 AM,   
> wrote: 
> > here: 
> > https://github.com/golang/go/files/447163/GoFunctionsInAssembly.pdf 
>
> OK, you'll have to ask Michael Munday, CC'ed. 
>
> Ian 
>
> > 在 2018年4月17日星期二 UTC+8下午10:15:07，Ian Lance Taylor写道： 
> >> 
> >> On Tue, Apr 17, 2018 at 5:33 AM,  wrote: 
> >> > 
> >> > Official doc (golang.org/doc/asm) said that: 
> >> > 
> >> > The SP pseudo-register is a virtual stack pointer used to refer to 
> >> > frame-local variables and the arguments being prepared for function 
> calls. 
> >> > It points to the top of the local stack frame, so references should 
> use 
> >> > negative offsets in the range [−framesize, 0): x-8(SP), y-4(SP), and 
> so on. 
> >> > 
> >> > And I've found a slide introduce the amd64 stack frame layout. 
> >> > 
> >> > So, is the -framesize a correct value? If I count from the SP(virtual 
> >> > register), the min address will exceed the stack frame address range. 
> >> 
> >> I don't think the diagram you are looking at describes how the Go 
> >> assembler works.  I note that it seems to say IBM on the side.  Where 
> >> did you find the diagram? 
> >> 
> >> Ian 
> > 
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Re: [go-nuts] question about asm doc

[Ian Lance Taylor]

On Tue, Apr 17, 2018 at 9:46 AM,   wrote:
> here:
> https://github.com/golang/go/files/447163/GoFunctionsInAssembly.pdf

OK, you'll have to ask Michael Munday, CC'ed.

Ian

> 在 2018年4月17日星期二 UTC+8下午10:15:07，Ian Lance Taylor写道：
>>
>> On Tue, Apr 17, 2018 at 5:33 AM,  wrote:
>> >
>> > Official doc (golang.org/doc/asm) said that:
>> >
>> > The SP pseudo-register is a virtual stack pointer used to refer to
>> > frame-local variables and the arguments being prepared for function calls.
>> > It points to the top of the local stack frame, so references should use
>> > negative offsets in the range [−framesize, 0): x-8(SP), y-4(SP), and so on.
>> >
>> > And I've found a slide introduce the amd64 stack frame layout.
>> >
>> > So, is the -framesize a correct value? If I count from the SP(virtual
>> > register), the min address will exceed the stack frame address range.
>>
>> I don't think the diagram you are looking at describes how the Go
>> assembler works.  I note that it seems to say IBM on the side.  Where
>> did you find the diagram?
>>
>> Ian
>
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Re: [go-nuts] question about asm doc

[buaa . cch]

here:
https://github.com/golang/go/files/447163/GoFunctionsInAssembly.pdf

在 2018年4月17日星期二 UTC+8下午10:15:07，Ian Lance Taylor写道：
>
> On Tue, Apr 17, 2018 at 5:33 AM,  wrote: 
> > 
> > Official doc (golang.org/doc/asm) said that: 
> > 
> > The SP pseudo-register is a virtual stack pointer used to refer to 
> frame-local variables and the arguments being prepared for function calls. 
> It points to the top of the local stack frame, so references should use 
> negative offsets in the range [−framesize, 0): x-8(SP), y-4(SP), and so on. 
> > 
> > And I've found a slide introduce the amd64 stack frame layout. 
> > 
> > So, is the -framesize a correct value? If I count from the SP(virtual 
> register), the min address will exceed the stack frame address range. 
>
> I don't think the diagram you are looking at describes how the Go 
> assembler works.  I note that it seems to say IBM on the side.  Where 
> did you find the diagram? 
>
> Ian 
>

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Re: [go-nuts] question about asm doc

[Ian Lance Taylor]

On Tue, Apr 17, 2018 at 5:33 AM,  wrote:
>
> Official doc (golang.org/doc/asm) said that:
>
> The SP pseudo-register is a virtual stack pointer used to refer to 
> frame-local variables and the arguments being prepared for function calls. It 
> points to the top of the local stack frame, so references should use negative 
> offsets in the range [−framesize, 0): x-8(SP), y-4(SP), and so on.
>
> And I've found a slide introduce the amd64 stack frame layout.
>
> So, is the -framesize a correct value? If I count from the SP(virtual 
> register), the min address will exceed the stack frame address range.

I don't think the diagram you are looking at describes how the Go
assembler works.  I note that it seems to say IBM on the side.  Where
did you find the diagram?

Ian

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[go-nuts] question about asm doc

[buaa . cch]

Official doc (golang.org/doc/asm) said that:

The SP pseudo-register is a virtual stack pointer used to refer to 
frame-local variables and the arguments being prepared for function calls. 
It points to the top of the local stack frame, so references should use 
negative offsets in the range [−framesize, 0): x-8(SP), y-4(SP), and so on.

And I've found a slide introduce the amd64 stack frame layout.


So, is the -framesize a correct value? If I count from the SP(virtual 
register), the min address will exceed the stack frame address range.

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