Re: [uml-devel] [RFC] PATCH 3/4 - Time virtualization : PTRACE_SYSCALL_MASK

[Jeff Dike]

On Fri, Apr 28, 2006 at 10:28:46PM +0200, Blaisorblade wrote:
> Ok, this gives us a definite proposal, which I finally like:
> 
> * to exclude sys_tee:
> 
> bitmask = 0;
> set_bit(__NR_tee, bitmask);
> ptrace(PTRACE_SET_NOTRACE, bitmask);
> 
> * to trace only sys_tee:
> 
> bitmask = 0;
> set_bit(__NR_tee, bitmask);
> ptrace(PTRACE_SET_TRACEONLY, bitmask);

Yup, I like this.

> the call fails if any of them is 1, and in the failure case E2BIG or 
> EOVERFLOW is returned

strerror(E2BIG) is "Arg list too long"

strerror(EOVERFLOW) is "Value too large for defined data type"

Neither of those seems right.  I'd just as soon stick with -EINVAL.

				Jeff


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