lib/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2025-07-28 00:21:52 +03:00
Code Activity

Linux: Implement interfaces for memory protection keys

Browse Source 
This adds system call wrappers for pkey_alloc, pkey_free, pkey_mprotect,
and x86-64 implementations of pkey_get and pkey_set, which abstract over
the PKRU CPU register and hide the actual number of memory protection
keys supported by the CPU.  pkey_mprotect with a -1 key is implemented
using mprotect, so it will work even if the kernel does not support the
pkey_mprotect system call.

The system call wrapers use unsigned int instead of unsigned long for
parameters, so that no special treatment for x32 is needed.  The flags
argument is currently unused, and the access rights bit mask is limited
to two bits by the current PKRU register layout anyway.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
This commit is contained in:
Florian Weimer
2017-12-05 15:20:30 +01:00
parent da616c1496
commit 446d22e91d
50 changed files with 1179 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
View File

@ -1984,6 +1984,11 @@ GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F
GLIBC_2.27 mlock2 F
GLIBC_2.27 pkey_alloc F
GLIBC_2.27 pkey_free F
GLIBC_2.27 pkey_get F
GLIBC_2.27 pkey_mprotect F
GLIBC_2.27 pkey_set F
GLIBC_2.27 strfromf128 F
GLIBC_2.27 strfromf64x F
GLIBC_2.27 strtof128 F

5
sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
View File

@ -1921,6 +1921,11 @@ GLIBC_2.27 glob F
GLIBC_2.27 glob64 F
GLIBC_2.27 memfd_create F
GLIBC_2.27 mlock2 F
GLIBC_2.27 pkey_alloc F
GLIBC_2.27 pkey_free F
GLIBC_2.27 pkey_get F
GLIBC_2.27 pkey_mprotect F
GLIBC_2.27 pkey_set F
GLIBC_2.27 strfromf128 F
GLIBC_2.27 strfromf64x F
GLIBC_2.27 strtof128 F