The register constraints for the inline assembly in fsqr() and fsqr2() are pretty tight on what the compiler may assign to the remaining three register variables. The clobber list only allows the following to be used: RDI, RSI, RBP and R12. With RAP reserving R12 and a kernel having CONFIG_FRAME_POINTER=y, claiming RBP, there are only two registers left so the compiler rightfully complains about impossible constraints. Provide alternatives that'll allow a memory reference for 'out' to solve the allocation constraint dilemma for this configuration. Also make 'out' an input-only operand as it is only used as such. This not only allows gcc to optimize its usage further, but also works around older gcc versions, apparently failing to handle multiple alternatives correctly, as in failing to initialize the 'out' operand with its input value. Signed-off-by:Mathias Krause <minipli@grsecurity.net> Signed-off-by:
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| README.md |
WireGuard was merged into the Linux kernel for 5.6. This repository contains a backport of WireGuard for kernels 3.10 to 5.5, as an out of tree module.
More information may be found at WireGuard.com.
This project is released under the GPLv2.