makecontext.3: Minor rewording

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man3/makecontext.3

@@ -36,8 +36,12 @@ makecontext, swapcontext \- manipulate user context
 .PP
 .BI "int swapcontext(ucontext_t *" oucp ", const ucontext_t *" ucp );
 .SH DESCRIPTION
-In a System V-like environment, one has the type \fIucontext_t\fP defined in
+In a System V-like environment, one has the type
+.I ucontext_t
+(defined in
 .I <ucontext.h>
+and described in
+.BR getcontext (3))
 and the four functions
 .BR getcontext (3),
 .BR setcontext (3),
@@ -47,9 +51,6 @@ and
 that allow user-level context switching
 between multiple threads of control within a process.
 .PP
-For the type and the first two functions, see
-.BR getcontext (3).
-.PP
 The
 .BR makecontext ()
 function modifies the context pointed to

man7/signal.7

@@ -287,6 +287,13 @@ the thread's current signal mask;
 .IP +
 the thread's alternate signal stack settings.
 .RE
+.IP
+(If the signal handler was installed using the
+.BR sigaction (2)
+.B SA_SIGINFO
+flag, then the above information is accessible via the
+.I ucontext
+pointer that is passed as the third argument of the signal handler.)
 .IP d)
 Any signals specified in
 .I act\->sa_mask