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sigaction.2: Mention that libc sets the act.sa_restorer field 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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Michael Kerrisk 2017-10-08 14:46:20 +02:00
parent 3ddb841ebb
commit be98c938b5
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@ -961,6 +961,19 @@ See
.BR nptl (7) .BR nptl (7)
for details. for details.
.PP .PP
On architectures where the signal trampoline resides in the C library,
the glibc wrapper function for
.BR sigaction ()
places the address of the trampoline code in the
.I act.sa_restorer
field and sets the
.B SA_RESTORER
flag in the
.IR act.sa_flags
field.
See
.BR sigreturn (2).
.PP
The original Linux system call was named The original Linux system call was named
.BR sigaction (). .BR sigaction ().
However, with the addition of real-time signals in Linux 2.2, However, with the addition of real-time signals in Linux 2.2,