From 1283c478aa0a9b3d84320db5745a61b7f61b360c Mon Sep 17 00:00:00 2001 From: Joseph Myers Date: Fri, 23 Nov 2018 17:53:50 +0000 Subject: Fix Arm __ASSUME_COPY_FILE_RANGE (bug 23915). The generic kernel-features.h defines __ASSUME_COPY_FILE_RANGE for 4.5 and later kernels. However, for 32-bit Arm binaries running on 64-bit Arm kernels, the syscall was only wired up in the 4.7 kernel, although the 32-bit Arm kernel had the syscall from 4.5 onwards. This patch corrects the Arm kernel-features.h to undefine the macro for configured minimum kernel versions before 4.7. Tested (compilation only) with a build-many-glibcs.py build for arm-linux-gnueabi. [BZ #23915] * sysdeps/unix/sysv/linux/arm/kernel-features.h [__LINUX_KERNEL_VERSION < 0x040700] (__ASSUME_COPY_FILE_RANGE): Undefine. --- ChangeLog | 7 +++++++ sysdeps/unix/sysv/linux/arm/kernel-features.h | 7 ++++--- 2 files changed, 11 insertions(+), 3 deletions(-) diff --git a/ChangeLog b/ChangeLog index ce7a55f1fc..f8f7672c5b 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,10 @@ +2018-11-23 Joseph Myers + + [BZ #23915] + * sysdeps/unix/sysv/linux/arm/kernel-features.h + [__LINUX_KERNEL_VERSION < 0x040700] (__ASSUME_COPY_FILE_RANGE): + Undefine. + 2018-11-23 H.J. Lu * sysdeps/x86/Makefile (tests): Add tst-cet-legacy-1a. diff --git a/sysdeps/unix/sysv/linux/arm/kernel-features.h b/sysdeps/unix/sysv/linux/arm/kernel-features.h index c6e745227c..e4ca98bfea 100644 --- a/sysdeps/unix/sysv/linux/arm/kernel-features.h +++ b/sysdeps/unix/sysv/linux/arm/kernel-features.h @@ -40,11 +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. */ +/* Support for the mlock2 and copy_file_range syscalls was added to + the compat syscall table for 64-bit kernels in 4.7, although + present in 32-bit kernels from 4.4 and 4.5 respectively. */ #if __LINUX_KERNEL_VERSION < 0x040700 # undef __ASSUME_MLOCK2 +# undef __ASSUME_COPY_FILE_RANGE #endif #undef __ASSUME_CLONE_DEFAULT -- cgit 1.4.1