1 files changed, 20 insertions, 0 deletions
diff --git a/chapter25/src/main/smp/sys/libc.smp b/chapter25/src/main/smp/sys/libc.smp
new file mode 100644
index 00000000..42fc7313
--- /dev/null
+++ b/chapter25/src/main/smp/sys/libc.smp
@@ -0,0 +1,20 @@
+// -*- mode: java;  -*-
+
+// libc bindings:
+//   https://www.man7.org/linux/man-pages/man2/<libc call>.2.html
+
+// fd  buf len -> len
+{  i32 i64 u32 -> u32 } write = "C";
+// fd  buf len -> len
+{  i32 i64 u32 -> u32 } read = "C";
+// status
+{  i32 -> i32 } _exit = "C";
+// addr len prot flags fd  off -> void*
+{  i64  i64 i32  i32   i32 i32 -> i64 } mmap = "C";
+// mmap flags
+i32 PROT_EXEC = 4;
+i32 PROT_READ = 1;
+i32 PROT_WRITE= 2;
+i32 PROT_NONE = 0;
+i32 MAP_PRIVATE = 2;
+i32 MAP_ANON = 32;