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prctl.2: Fixes to Dave Martin's patch 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2020-06-09 13:33:23 +02:00
parent 8165500d4c
commit 7289930f20
1 changed files with 6 additions and 6 deletions
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12
man2/prctl.2
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@ -984,7 +984,7 @@ generic authentication \(lqA\(rq key.
.IP
As a special case, if
.I arg2
is zero then all the keys are reset.
is zero, then all the keys are reset.
Since new keys could be added in future,
this is the recommended way to completely wipe the existing keys
when establishing a clean execution context.
@ -997,7 +997,7 @@ since
resets all the pointer authentication keys.
.IP
The remaining arguments
.IR arg3 ", " arg4 " and " arg5
.IR arg3 ", " arg4 ", and " arg5
must all be zero.
.IP
If the arguments are invalid,
@ -1005,13 +1005,16 @@ and in particular if
.I arg2
contains set bits that are unrecognized
or that correspond to a key not available on this platform,
the call fails with error
then the call fails with error
.BR EINVAL .
.IP
.B Warning:
Because the compiler or run-time environment
may be using some or all of the keys,
a successful
may crash the calling process.
The conditions for using it safely are complex and system-dependent.
Don't use it unless you know what you are doing.
.IP
For more information, see the kernel source file
.I Documentation/arm64/pointer\-authentication.rst
@ -1020,9 +1023,6 @@ For more information, see the kernel source file
.I Documentation/arm64/pointer\-authentication.txt
before Linux 5.3).
.B PR_PAC_RESET_KEYS
may crash the calling process.
The conditions for using it safely are complex and system-dependent.
Don't use it unless you know what you are doing.
.\" prctl PR_SET_PDEATHSIG
.TP
.BR PR_SET_PDEATHSIG " (since Linux 2.1.57)"