Adding SafePOSIX Implementation of Syscalls

GlibC

To deliver the syscall to NaCl, add the interface of the syscall here:

• Lind-GlibC/sysdeps/nacl/lind_syscalls.h
• Lind-GlibC/sysdeps/nacl/lind_syscalls.c

Native Client

To pack the syscall and send it to Repy, add Remote Procedure Call (RPC) here:

• native_client/src/shared/platform/lind_platform.h
• native_client/src/shared/platform/lind_platform.c

To have SafePOSIX do the actual work, edit the syscall's NaCl implementation here:

• native_client/src/trusted/service_runtime/nacl_syscall_common.c

Repy + SafePOSIX

This file is where RPC is accepted and syscalls are delivered to the dispatcher. Have the new syscall included here:

• nacl_repy/seattlelib/lind_server.mix

To match the syscall with its Lind implementation, add a new pairing here:

• nacl_repy/seattlelib/dispatcher.repy

Add the syscall's Lind implementation here:

• nacl_repy/seattlelib/lind_fs_calls.py

In this directory, you will also need to create a new .repy file that will act as the syscall's handler. There you do any mandatory checking and, after the syscall is implemented, pack the result back to NaCl.