Date: Fri, 3 Apr 2020 17:17:17 +0000 (UTC) From: Ed Maste <emaste@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r359608 - head/share/man/man5 Message-ID: <202004031717.033HHHXZ021255@repo.freebsd.org>
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Author: emaste Date: Fri Apr 3 17:17:17 2020 New Revision: 359608 URL: https://svnweb.freebsd.org/changeset/base/359608 Log: elf.5: expand on NT_FREEBSD_FEATURE_CTL bit definitions Based on suggestions from kib in review D23982. Sponsored by: The FreeBSD Foundation Modified: head/share/man/man5/elf.5 Modified: head/share/man/man5/elf.5 ============================================================================== --- head/share/man/man5/elf.5 Fri Apr 3 17:08:47 2020 (r359607) +++ head/share/man/man5/elf.5 Fri Apr 3 17:17:17 2020 (r359608) @@ -1317,12 +1317,24 @@ is ignored. Contains the MACHINE_ARCH that the executable was built for. .It Dv NT_FREEBSD_FEATURE_CTL Pq Value: 4 Contains a bitmask of mitigations and features to enable: -.Bl -column "NT_FREEBSD_FCTL_PROTMAX_DISABLE" "0x00" "Disable implicit PROT_MAX" -.Sy Name Ta Sy Value Ta Sy Description -.It NT_FREEBSD_FCTL_ASLR_DISABLE Ta 0x01 Ta Disable ASLR -.It NT_FREEBSD_FCTL_PROTMAX_DISABLE Ta 0x02 Ta Disable implicit PROT_MAX -.It NT_FREEBSD_FCTL_STKGAP_DISABLE Ta 0x04 Ta Disable stack gap -.It NT_FREEBSD_FCTL_WXNEEDED Ta 0x08 Ta Binary makes W+X mappings +.Bl -tag -width 4n +.\" .Bl -column "NT_FREEBSD_FCTL_PROTMAX_DISABLE" "0x00" "Disable implicit PROT_MAX" +.\" .Sy Name Ta Sy Value Ta Sy Description +.It NT_FREEBSD_FCTL_ASLR_DISABLE Pq Value: 0x01 +Request that address randomization (ASLR) not be performed. +See +.Xr security 7 . +.It NT_FREEBSD_FCTL_PROTMAX_DISABLE Pq Value: 0x02 +Request that +.Xr mmap 2 +calls not set PROT_MAX to the initial value of the +.Fa prot +argument. +.It NT_FREEBSD_FCTL_STKGAP_DISABLE Pq Value: 0x04 +Disable stack gap. +.It NT_FREEBSD_FCTL_WXNEEDED Pq Value: 0x08 +Indicate that the binary requires mappings that are simultaneously +writeable and executable. .El .El .Sh SEE ALSO
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