When a branch instruction (i.e. call/ret/jmp) triggers a control-protection fault, si_code is set to SEGV_CPERR. Add the new si_code to sigaction.2.
Signed-off-by: Yu-cheng Yu <yu-cheng...@intel.com> Cc: Alejandro Colomar <alx.manpa...@gmail.com> Cc: Michael Kerrisk <mtk.manpa...@gmail.com> Cc: Andy Lutomirski <l...@kernel.org> Cc: Borislav Petkov <b...@alien8.de> Cc: Dave Hansen <dave.han...@linux.intel.com> Cc: Florian Weimer <fwei...@redhat.com> Cc: "H.J. Lu" <hjl.to...@gmail.com> Cc: linux-kernel@vger.kernel.org Cc: linux-...@vger.kenel.org Link: https://lore.kernel.org/linux-api/20210217222730.15819-7-yu-cheng...@intel.com/ --- man2/sigaction.2 | 3 +++ 1 file changed, 3 insertions(+) diff --git a/man2/sigaction.2 b/man2/sigaction.2 index cc183198d..49a30f11e 100644 --- a/man2/sigaction.2 +++ b/man2/sigaction.2 @@ -737,6 +737,9 @@ See .BR pkeys (7). The protection key which applied to this access is available via .IR si_pkey . +.TP +.B SEGV_CPERR +A branch instruction (call, ret, or jmp) triggered a control-protection fault. .RE .PP The following values can be placed in -- 2.21.0
