Signed-off-by: Florian Weimer <fweimer@xxxxxxxxxx> --- man2/sigaltstack.2 | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/man2/sigaltstack.2 b/man2/sigaltstack.2 index 53268ccbe..1510a98ab 100644 --- a/man2/sigaltstack.2 +++ b/man2/sigaltstack.2 @@ -54,7 +54,10 @@ alternate signal stack. An alternate signal stack is used during the execution of a signal handler if the establishment of that handler (see .BR sigaction (2)) -requested it. +requested it using the +.B SA_ONSTACK +flag. Each thread that can execute such signal handlers needs its own +separate alternate signal stack. .PP The normal sequence of events for using an alternate signal stack is the following: @@ -67,7 +70,7 @@ signal stack. Use .BR sigaltstack () to inform the system of the existence and -location of the alternate signal stack. +location of the alternate signal stack for the current thread. .TP 3. When establishing a signal handler using
