[uml-devel] fixing ptrace for ARM

[uml-devel] fixing ptrace for ARM

[Sam T Sander]

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As a first step toward porting UML to ARM, I need to fix ptrace to modify system call numbers.  Unfortunately, I don't know where to start.  Can anyone point me in the right direction? Has anyone looked into this for ARM or any of the other ports?  What was changed in the X86 ptrace to fix it?
 
Thanks,
Sam
 
 

		
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Re: [uml-devel] fixing ptrace for ARM

[BlaisorBlade]

Alle 19:19, venerdì 27 agosto 2004, Sam T Sander ha scritto:
> As a first step toward porting UML to ARM, I need to fix ptrace to modify
> system call numbers.  Unfortunately, I don't know where to start.  Can
> anyone point me in the right direction? Has anyone looked into this for ARM
> or any of the other ports?  What was changed in the X86 ptrace to fix it?
I think that the work must be done in the stack layout on ptracing (read the 
handle_trap() function for what UML does). But also see this URL: 

http://perso.wanadoo.fr/laurent.vivier/UML/

One of the nice thing of those patches is that if you implement something 
similar (which is a lot easier IMHO) you don't need to be able to change 
system call numbers.
-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729


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Re: [uml-devel] fixing ptrace for ARM

[Sam T Sander]

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Thanks for the tip BlaisorBlade!  Something about sysemu should be added to the porting page.
 
-Sam

BlaisorBlade <blaisorblade_spam@yahoo.it> wrote:
I think that the work must be done in the stack layout on ptracing (read the 
handle_trap() function for what UML does). But also see this URL: 

http://perso.wanadoo.fr/laurent.vivier/UML/

One of the nice thing of those patches is that if you implement something 
similar (which is a lot easier IMHO) you don't need to be able to change 
system call numbers.
-- 
Paolo Giarrusso, aka Blaisorblade
Linux registered user n. 292729

		
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