tree db5780ca34bee26bfcb1bbbdb8a2a3ab71c14b5a
parent 5149fa47ec90eb5e79e28f3a7fbcf29421524817
author Laurent MEYER <meyerlau@fr.ibm.com> 1143452261 +0200
committer Paul Mackerras <paulus@samba.org> 1143524724 +1100

[PATCH] powerpc: fix incorrect SA_ONSTACK behaviour for 64-bit processes

*) When setting a sighandler using sigaction() call, if the flag
SA_ONSTACK is set and no alternate stack is provided via sigaltstack(),
the kernel still try to install the alternate stack. This behavior is
the opposite of the one which is documented in Single Unix
Specifications V3.

*) Also when setting an alternate stack using sigaltstack() with the
flag SS_DISABLE, the kernel try to install the alternate stack on
signal delivery.

These two use cases makes the process crash at signal delivery.

This fixes it.

Signed-off-by: Laurent Meyer <meyerlau@fr.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>