[uml-devel] Question about syscall in UML tt mode

[uml-devel] Question about syscall in UML tt mode

[Alex LIU]

Hi all:

Now I added a system call in UML which should use pt_regs as its parameter. So the system call is "sys_XXX(struct pt_regs)" just like sys_fork(struct pt_regs) under i386 architecture. But I didn't find any syscall under UML which use pt_regs as its parameter. 

I found the EXECUTE_SYSCALL(syscall,regs) in UML is defined only with 6 parameters which are ebx,ecx.... So I think I can't use pt_regs as my syscall parameter,right?

So I directly use current->thread.regs in my system call. It seems worked.

I want to know whether it's safe to do that. Thanks!

Alex



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