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SubjectRe: sigcontext on Linux-ppc in user space
John Kacur <> writes:

> Does anyone know how to get at the struct sigcontext in a signal handler
> on Linux for powerpc? sigaction of course lets you create a signal
> handler as a function with the prototype void(*)(int, siginfo_t *, void
> *)
> where the last argument, a pointer to void, is the sigcontext. I believe
> that the last argument is NOT defined by POSIX and so is implementation
> dependent.
> On Intel it seems sufficient to use #include <asm/sigcontext.h>
> to get the definition of struct sigcontext, and then get the values
> you'd like out of the signal handler. But on Linux for powerpc, the same
> thing doesn't work. Does anyone know what the trick is here to
> accomplish this?

You should never include kernel headers in user space.

If you have a glibc 2.1 (or newer) based system, just include
<signal.h> which will include <bits/sigcontext.h> with the struct
(this works on all architectures).

Andreas Jaeger
SuSE Labs
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