Linux prepares to axe legacy x32 hybrid mode — hybrid 32-bit/64-bit mode faces complete removal by 2027 due to low adoption
Linux is planning to remove the x32 hybrid mode from its kernel by 2027 due to its low adoption rates. The x32 ABI was introduced to optimize memory usage for 64-bit applications but has not gained significant traction among developers. As a result, the proposal to retire this feature is likely to proceed without objections.
- ▪The x32 ABI was introduced in 2012 to reduce the memory footprint of 64-bit applications.
- ▪Its main advantage was allowing access to the full 64-bit register file while using 32-bit pointers.
- ▪The lack of mainstream adoption and technical limitations have led to the proposal for its removal.
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Software Operating Systems Linux Linux prepares to axe legacy x32 hybrid mode — hybrid 32-bit/64-bit mode faces complete removal by 2027 due to low adoption News By Aaron Klotz published 29 May 2026 x32 ABI is designed to reduce the memory footprint of 64-bit applications When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. (Image credit: Shutterstock (539485015)) Copy link Facebook X Whatsapp Reddit Pinterest Flipboard Email Share this article 0 Join the conversation Follow us Add us as a preferred source on Google Newsletter Subscribe to our newsletter Linux developers are looking into retiring the x32 ABI that was introduced into the Linux kernel in 2012.
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