[Bug tapsets/23160] 4.17 breaks syscalls tapset

[fche at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=23160

Frank Ch. Eigler <fche at redhat dot com> changed:

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                 CC|                            |fche at redhat dot com

--- Comment #2 from Frank Ch. Eigler <fche at redhat dot com> ---
Created attachment 11073
  --> https://sourceware.org/bugzilla/attachment.cgi?id=11073&action=edit
adaptation example for syscall.read

This patch is an example of the adaptation of syscall.read to both 4.17 and the
tracepoint (bug #14690) as fallbacks.  The gist is to factor out the
registers.stp-based argument fetching code into a separate macro, and to
introduce a new embedded-c function to set the context uregs to the pt_regs*
struct we get with either the 4.17 style syscall wrapper or the tracepoints.

... now to repeat some 330 times ... eww

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