On Wed, Jun 22, 2016 at 04:49:52PM +0100, Catalin Marinas wrote: > On Tue, Jun 21, 2016 at 08:06:55AM +0300, Yury Norov wrote: > > This patch adds support for ILP32 syscalls, sign and zero extending > > where needed. Unlike LP64, pointers are 32bit and need to be zero > > extended rather than the standard sign extend that the code would do. > > We take advatage of ssize_t being long rather than int for ILP32, > > to get this correct. > > Unless I misunderstand what this patch does, I thought we agreed that > 32-bit arguments are passed as 32-bit values and it is the kernel's > responsibility to zero or sign-extend the upper half (IOW, assume > garbage just like the PCS ABI). > > We are still debating whether 64-bit values are passed in one or two > registers but this doesn't change the situation of 32-bit values like > pointers. > > -- > Catalin
Hi Catalin, I dropped this patch with no regressions. It might be needed it we choose s390-like wrappers, but this series is not about it anyway. BTW, what about 64-bit values passing? Any new comments? Yury.
