1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

Linux 3.4 Kernel Has x32 ABI Support

Linux Kernel

Published on 05 April 2012 10:49 AM EDT
Written by Michael Larabel in Linux Kernel
37 Comments

The pull happened last week prior to the Linux 3.4-rc1 release, but one of the other interesting changes in the Linux 3.4 kernel that hasn't been talked about much is the x32 support.

Back in February I talked about the x32 support being called in for kernel review, which Ingo Molnar sent in during the 3.4 merge window and he was successful in getting Linus to pull the tree.

Linux x32 is a new, native 32-bit ABI for x86_64 on Linux. Applications not needing 64-bit address space can now optionally target this 32-bit ABI to take advantage of the smaller 32-bit memory foot-print while still being able to take advantage of x86_64 CPU instructions and other functionality.

On the GCC side the x32 compiler support has already been merged and now the Linux kernel support is in place. There's also changes needed for x32 with GNU binutils and glibc.

On the kernel side, per the Git pull message, is the x32 binary format and execution mode for x86. This provides 32-bit data-space binaries using 64-bit instructions and 64-bit kernel syscalls.

Since the 3.4-rc1 release, on the GCC mailing list there's now an RFC message concerning the x32 TLS specification.

It will be a while until the x32 support is fully ready and found throughout new Linux distribution releases, but this 32-bit ABI is finally materializing in the real world.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Linux Hardware Reviews
  1. Intel Xeon E5-1680 v3 & E5-2687W v3 Compared To The Core i7 5960X On Linux
  2. Intel 120GB 530 Series SSD Linux Performance
  3. Btrfs/EXT4/XFS/F2FS RAID 0/1/5/6/10 Linux Benchmarks On Four SSDs
  4. AMD's Windows Catalyst Driver Remains Largely Faster Than Linux Drivers
Latest Linux Articles
  1. NVIDIA vs. Nouveau Drivers With Linux 3.18 + Mesa 10.4-devel
  2. Is The Open-Source NVIDIA Driver Fast Enough For Steam On Linux Gaming?
  3. Linux 3.18 File-System Performance Minimally Changed But Possible Regressions
  4. AMD Radeon Gallium3D Is Catching Up & Sometimes Beating Catalyst On Linux
Latest Linux News
  1. Linux 3.18-rc6 Released, A Worrisome Regression Remains
  2. HandBrake 0.10 Brings H.265 & VP8 Encoders
  3. Gngr: A New Web Browser Focused On Privacy
  4. Linux 3.18 Kernel: Not Much Change With Intel Haswell Performance
  5. More File-System Tests Of The Linux 3.18 Kernel
  6. Using NVIDIA's NVENC On Linux With FFmpeg
  7. There's Talk Again About An "Open To The Core" Ubuntu Laptop
  8. PowerVR SGX Driver Code Gets Leaked
  9. V2 Of KDBUS Published For Linux Kernel Review
  10. VirtualBox 4.3.20 Arrives, Still No Sign Of VirtualBox 4.4
Latest Forum Discussions
  1. PulseAudio 6.0 Is Coming & Other Linux Audio Plans For The Future
  2. Debian Developer Resigns From The Systemd Maintainership Team
  3. Roadmap to Catalyst 14.10 ?
  4. Updated and Optimized Ubuntu Free Graphics Drivers
  5. Cant get working Kaveri APU - A10-7850k
  6. Script for Fan Speed Control
  7. Debian Init System Coupling Vote Results
  8. The Slides Announcing The New "AMDGPU" Kernel Driver