From d75abc611fa66dcf1d439bcb019fe993bafe730e Mon Sep 17 00:00:00 2001
From: Theodore Dubois <tblodt@icloud.com>
Date: Fri, 5 Jun 2020 00:31:19 -0700
Subject: [PATCH] Stub splice()

I was running ./configure for https://github.com/redneb/ghc-alt-libc and
spotted a bad syscall in the linker, this was an easy fix
---
 kernel/calls.c | 1 +
 kernel/calls.h | 1 +
 kernel/fs.c    | 3 +++
 3 files changed, 5 insertions(+)

diff --git a/kernel/calls.c b/kernel/calls.c
index 88a3eddf..0c9c278b 100644
--- a/kernel/calls.c
+++ b/kernel/calls.c
@@ -196,6 +196,7 @@ syscall_t syscall_table[] = {
     [309] = (syscall_t) sys_ppoll,
     [311] = (syscall_t) sys_set_robust_list,
     [312] = (syscall_t) sys_get_robust_list,
+    [313] = (syscall_t) sys_splice,
     [319] = (syscall_t) sys_epoll_pwait,
     [320] = (syscall_t) sys_utimensat,
     [322] = (syscall_t) sys_timerfd_create,
diff --git a/kernel/calls.h b/kernel/calls.h
index fdb7b88e..ec74a5fe 100644
--- a/kernel/calls.h
+++ b/kernel/calls.h
@@ -149,6 +149,7 @@ dword_t sys_umask(dword_t mask);
 
 dword_t sys_sendfile(fd_t out_fd, fd_t in_fd, addr_t offset_addr, dword_t count);
 dword_t sys_sendfile64(fd_t out_fd, fd_t in_fd, addr_t offset_addr, dword_t count);
+dword_t sys_splice(fd_t in_fd, addr_t in_off_addr, fd_t out_fd, addr_t out_off_addr, dword_t count, dword_t flags);
 dword_t sys_copy_file_range(fd_t in_fd, addr_t in_off, fd_t out_fd, addr_t out_off, dword_t len, uint_t flags);
 
 dword_t sys_statfs(addr_t path_addr, addr_t buf_addr);
diff --git a/kernel/fs.c b/kernel/fs.c
index 149c0b12..5d0f5339 100644
--- a/kernel/fs.c
+++ b/kernel/fs.c
@@ -961,6 +961,9 @@ dword_t sys_sendfile(fd_t UNUSED(out_fd), fd_t UNUSED(in_fd), addr_t UNUSED(offs
 dword_t sys_sendfile64(fd_t UNUSED(out_fd), fd_t UNUSED(in_fd), addr_t UNUSED(offset_addr), dword_t UNUSED(count)) {
     return _EINVAL;
 }
+dword_t sys_splice(fd_t UNUSED(in_fd), addr_t UNUSED(in_off_addr), fd_t UNUSED(out_fd), addr_t UNUSED(out_off_addr), dword_t UNUSED(count), dword_t UNUSED(flags)) {
+    return _EINVAL;
+}
 dword_t sys_copy_file_range(fd_t UNUSED(in_fd), addr_t UNUSED(in_off), fd_t UNUSED(out_fd),
         addr_t UNUSED(out_off), dword_t UNUSED(len), uint_t UNUSED(flags)) {
     return _EPERM; // good enough for ruby