[PATCH 06/15] mips64: Consolidate Linux sysdep.h

Joseph Myers joseph@codesourcery.com
Mon Feb 10 22:48:00 GMT 2020


On Mon, 10 Feb 2020, Adhemerval Zanella wrote:

> The mips64 Linux syscall macros only differs argument type and
> the requirement of zero-extending values on n32.  The headers

It's sign-extension, not zero-extension (because that's the 
architecturally-defined rule for how 32-bit values must be represented in 
64-bit registers for 32-bit instructions to work correctly - though 
current Linux kernels ensure syscall arguments are properly extended 
before they reach any C functions in the kernel).

-- 
Joseph S. Myers
joseph@codesourcery.com



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