diff options
Diffstat (limited to 'man2/pkey_alloc.2')
| -rw-r--r-- | man2/pkey_alloc.2 | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/man2/pkey_alloc.2 b/man2/pkey_alloc.2 index 53d8f2a..5d72fb9 100644 --- a/man2/pkey_alloc.2 +++ b/man2/pkey_alloc.2 @@ -2,7 +2,7 @@ .\" .\" SPDX-License-Identifier: Linux-man-pages-copyleft .\" -.TH pkey_alloc 2 2023-03-30 "Linux man-pages 6.05.01" +.TH pkey_alloc 2 2023-10-31 "Linux man-pages 6.7" .SH NAME pkey_alloc, pkey_free \- allocate or free a protection key .SH LIBRARY @@ -12,7 +12,7 @@ Standard C library .nf .BR "#define _GNU_SOURCE" " /* See feature_test_macros(7) */" .B #include <sys/mman.h> -.PP +.P .BI "int pkey_alloc(unsigned int " flags ", unsigned int " access_rights ");" .BI "int pkey_free(int " pkey ");" .fi @@ -20,12 +20,12 @@ Standard C library .BR pkey_alloc () allocates a protection key (pkey) and allows it to be passed to .BR pkey_mprotect (2). -.PP +.P The .BR pkey_alloc () .I flags is reserved for future use and currently must always be specified as 0. -.PP +.P The .BR pkey_alloc () .I access_rights @@ -36,13 +36,13 @@ Disable all data access to memory covered by the returned protection key. .TP .B PKEY_DISABLE_WRITE Disable write access to memory covered by the returned protection key. -.PP +.P .BR pkey_free () frees a protection key and makes it available for later allocations. After a protection key has been freed, it may no longer be used in any protection-key-related operations. -.PP +.P An application should not call .BR pkey_free () on any protection key which has been assigned to an address @@ -96,7 +96,7 @@ It can be used in lieu of any other mechanism for detecting pkey support and will simply fail with the error .B ENOSPC if the operating system has no pkey support. -.PP +.P The kernel guarantees that the contents of the hardware rights register (PKRU) will be preserved only for allocated protection keys. |