Am Tue, Apr 12, 2022 at 12:29:21PM -0000 schrieb Christos Zoulas: > In article > <CALigkZQpW8-wAty57d=hpsx6eo_RmacQ=pkej+FezNS_r6Mq=w...@mail.gmail.com>, > Piyush Sachdeva <piyushsachdeva...@gmail.com> wrote: > >-=-=-=-=-=- > > > >Dear Stephen Borrill, > >My name is Piyush, and I was looking into the > >'Emulating missing Linux syscalls' project hoping to contribute > >to this year's GSoC. > > > >I wanted to be sure of a few basic things before I go ahead: > >- linux binaries are found in- src/sys/compat/linux > >- particular implementation in - src/sys/compat/linux/common > >- a few architecture-specific implementations in- > > src/sys/compat/linux/arch/<arch_name>. > >- The src/sys/compat/linux/arch/<arch_name>/linux_syscalls.c file > > lists of system calls, and states if a particular syscall is present or > >not. > > > >I was planning to work on the 'sendfile()' syscall, which I believe > >is unimplemented for amd64 and a few other architectures as well. > > > >Considering the above points, I was hoping you could point me in > >the right direction for this project. Hope to hear from you soon. > > I would look into porting the FreeBSD implementation of sendfile to NetBSD.
sendfile(2) for Linux compat can be emulated in the kernel without backing. That said, a real splice(2) or even splicev(2) would be really nice to have. But that's a different project and arguable, a potentially more generally useful one, too. Joerg