Re: [PATCH v3] x86/altcall: use an union as register type for function parameters on clang

On 23.02.2024 14:03, Roger Pau Monne wrote: > The current code for alternative calls uses the caller parameter types as the > types for the register variables that serve as function parameters: > > uint8_t foo; > [...] > alternative_call(myfunc, foo); > > Would expand roughly into: > > register

[PATCH v3] x86/altcall: use an union as register type for function parameters on clang

The current code for alternative calls uses the caller parameter types as the types for the register variables that serve as function parameters: uint8_t foo; [...] alternative_call(myfunc, foo); Would expand roughly into: register unint8_t a1_ asm("rdi") = foo; register unsigned long a2_