8 files changed, 64 insertions, 0 deletions
diff --git a/sys/src/chdir.c b/sys/src/chdir.c
new file mode 100644
index 0000000..fd1385d
--- /dev/null
+++ b/sys/src/chdir.c
@@ -0,0 +1,7 @@
+#include "internal.h"
+
+int
+sys·chdir(char *path)
+{
+    return syscall(·Chdir, path);
+}
diff --git a/sys/src/close.c b/sys/src/close.c
new file mode 100644
index 0000000..88b1e2b
--- /dev/null
+++ b/sys/src/close.c
@@ -0,0 +1,7 @@
+#include "internal.h"
+
+int
+sys·close(int fd)
+{
+    return syscall(·Close, fd);
+}
diff --git a/sys/src/dup.c b/sys/src/dup.c
new file mode 100644
index 0000000..0943f52
--- /dev/null
+++ b/sys/src/dup.c
@@ -0,0 +1,7 @@
+#include "internal.h"
+
+int
+sys·dup(int fd)
+{
+    return syscall(·Dup, fd);
+}
diff --git a/sys/src/internal.h b/sys/src/internal.h
new file mode 100644
index 0000000..2bb1422
--- /dev/null
+++ b/sys/src/internal.h
@@ -0,0 +1,21 @@
+#pragma once
+
+#include <u.h>
+#include <internal/syscall.h>
+
+#define syscall1(n,a1)                   _syscall1(n,sysarg(a1))
+#define syscall2(n,a1,a2)                _syscall2(n,sysarg(a1),sysarg(a2))
+#define syscall3(n,a1,a2,a3)             _syscall3(n,sysarg(a1),sysarg(a2),sysarg(a3))
+#define syscall4(n,a1,a2,a3,a4)          _syscall4(n,sysarg(a1),sysarg(a2),sysarg(a3),sysarg(a4))
+#define syscall5(n,a1,a2,a3,a4,a5)       _syscall5(n,sysarg(a1),sysarg(a2),sysarg(a3),sysarg(a4),sysarg(a5))
+#define syscall6(n,a1,a2,a3,a4,a5,a6)    _syscall6(n,sysarg(a1),sysarg(a2),sysarg(a3),sysarg(a4),sysarg(a5),sysarg(a6))
+#define syscall7(n,a1,a2,a3,a4,a5,a6,a7) _syscall7(n,sysarg(a1),sysarg(a2),sysarg(a3),sysarg(a4),sysarg(a5),sysarg(a6),sysarg(a7))
+
+#define __SYSCALL_NARGS_X(a,b,c,d,e,f,g,h,n,...) n
+#define __SYSCALL_NARGS(...) __SYSCALL_NARGS_X(__VA_ARGS__,7,6,5,4,3,2,1,0,)
+#define __SYSCALL_CONCAT_X(a,b) a##b
+#define __SYSCALL_CONCAT(a,b) __SYSCALL_CONCAT_X(a,b)
+#define __SYSCALL_DISP(b,...) __SYSCALL_CONCAT(b,__SYSCALL_NARGS(__VA_ARGS__))(__VA_ARGS__)
+
+#define syscall(...) __SYSCALL_DISP(syscall,__VA_ARGS__)
+
diff --git a/sys/src/mmap.c b/sys/src/mmap.c
new file mode 100644
index 0000000..fb5c5f4
--- /dev/null
+++ b/sys/src/mmap.c
@@ -0,0 +1 @@
+#include "internal.h"
diff --git a/sys/src/open.c b/sys/src/open.c
new file mode 100644
index 0000000..02d2ca8
--- /dev/null
+++ b/sys/src/open.c
@@ -0,0 +1,7 @@
+#include "internal.h"
+
+int
+sys·open(char *path, int flag, int mode)
+{
+    return syscall(·Open, flag, mode);
+}
diff --git a/sys/src/read.c b/sys/src/read.c
new file mode 100644
index 0000000..3aa3e29
--- /dev/null
+++ b/sys/src/read.c
@@ -0,0 +1,7 @@
+#include "internal.h"
+
+intptr
+sys·read(int fd, intptr len, void *buf)
+{
+    return syscall(·Read, fd, buf, len);
+}
diff --git a/sys/src/write.c b/sys/src/write.c
new file mode 100644
index 0000000..c1faff5
--- /dev/null
+++ b/sys/src/write.c
@@ -0,0 +1,7 @@
+#include "internal.h"
+
+intptr
+sys·write(int fd, intptr size, intptr len, void *buf)
+{
+    return syscall(·Write, fd, buf, size*len);
+}