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sigaction.2: Describe obsolete usage of struct sigcontext as signal handler argument 

* man2/sigaction.2 (.SS Undocumented): Provide information about
  relation between the second argument of sa_handler and
  uc_mcontext field of the struct ucontext structure.

Signed-off-by: Eugene Syromyatnikov <evgsyr@gmail.com>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Eugene Syromyatnikov 2019-02-22 17:26:08 +01:00 committed by Michael Kerrisk
parent e4092d5e51
commit e1836e9d9e
1 changed files with 8 additions and 1 deletions
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@ -1009,7 +1009,14 @@ it was also possible to get some additional information,
namely by using a namely by using a
.I sa_handler .I sa_handler
with a second argument of type with a second argument of type
.IR "struct sigcontext". .I "struct sigcontext"
(it is the same structure as the one that is passed in the
.I uc_mcontext
field of the
.I struct ucontext
structure, pointer to which is passed in the third argument of
.I sa_sigaction
handler).
See the relevant Linux kernel sources for details. See the relevant Linux kernel sources for details.
This use is obsolete now. This use is obsolete now.
.SH BUGS .SH BUGS