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| author |   Joseph Myers <joseph@codesourcery.com> | 2018-11-07 16:27:35 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2018-11-07 16:27:35 +0000 |
| commit | 596cc360aa9f0484d6621fd9dfa5de83c3a24dc5 (patch) | |
| tree | 429562abeb09809b004957798b71a3603c474d3a /sysdeps | |
| parent | support: Fix printf format for TEST_COMPARE_STRING (diff) | |
| download | glibc-596cc360aa9f0484d6621fd9dfa5de83c3a24dc5.tar.gz glibc-596cc360aa9f0484d6621fd9dfa5de83c3a24dc5.tar.bz2 glibc-596cc360aa9f0484d6621fd9dfa5de83c3a24dc5.zip | |
Fix __ASSUME_MLOCK2 for ARM, MicroBlaze (bug 23867).
The generic kernel-features.h defines __ASSUME_MLOCK2 for 4.4 and
later kernels. However, for 32-bit ARM binaries running on 64-bit ARM
kernels, and for MicroBlaze, the syscall was only wired up in the 4.7
kernel. (32-bit ARM kernels did have the syscall from 4.4 onwards.)
This patch duly arranges for the macro to be undefined for those
architectures for kernels before 4.7.
Tested with build-many-glibcs.py for its ARM and MicroBlaze
configurations.
[BZ #23867]
* sysdeps/unix/sysv/linux/arm/kernel-features.h
[__LINUX_KERNEL_VERSION < 0x040700] (__ASSUME_MLOCK2): Undefine.
* sysdeps/unix/sysv/linux/microblaze/kernel-features.h
[__LINUX_KERNEL_VERSION < 0x040700] (__ASSUME_MLOCK2): Undefine.
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/unix/sysv/linux/arm/kernel-features.h | 7 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/microblaze/kernel-features.h | 5 |
2 files changed, 12 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/arm/kernel-features.h b/sysdeps/unix/sysv/linux/arm/kernel-features.h index 7831ab1e0f..c6e745227c 100644 --- a/sysdeps/unix/sysv/linux/arm/kernel-features.h +++ b/sysdeps/unix/sysv/linux/arm/kernel-features.h @@ -40,5 +40,12 @@ #define __ASSUME_RECV_SYSCALL 1 #define __ASSUME_SEND_SYSCALL 1 +/* Support for the mlock2 syscall was added to the compat syscall + table for 64-bit kernels in 4.7, although present in 32-bit kernels + from 4.4. */ +#if __LINUX_KERNEL_VERSION < 0x040700 +# undef __ASSUME_MLOCK2 +#endif + #undef __ASSUME_CLONE_DEFAULT #define __ASSUME_CLONE_BACKWARDS 1 diff --git a/sysdeps/unix/sysv/linux/microblaze/kernel-features.h b/sysdeps/unix/sysv/linux/microblaze/kernel-features.h index e8e2ac6a87..dfee428f49 100644 --- a/sysdeps/unix/sysv/linux/microblaze/kernel-features.h +++ b/sysdeps/unix/sysv/linux/microblaze/kernel-features.h @@ -58,6 +58,11 @@ # undef __ASSUME_EXECVEAT #endif +/* Support for the mlock2 syscall was added in 4.7. */ +#if __LINUX_KERNEL_VERSION < 0x040700 +# undef __ASSUME_MLOCK2 +#endif + /* Support for the copy_file_range syscall was added in 4.10. */ #if __LINUX_KERNEL_VERSION < 0x040A00 # undef __ASSUME_COPY_FILE_RANGE |