Move syscall definitions to an external package.

packages/Makefile

@@ -0,0 +1,5 @@
+nop:
+	@echo "Run make syscall to update syscall.lisp"
+
+syscall:
+	{ cat syscall.header; awk '/^#define __NR_/ { name=$$2; sub(/^__NR_/, "", name); print "(defconst SYS_" name " " $$3 ")" }' /usr/include/x86_64-linux-gnu/asm/unistd_64.h; } > syscall.lisp

packages/README.md

@@ -69,6 +69,15 @@ Property list code, included as part of `stdlib.lisp`, so there is no need to ad
 ```
 
 
+### syscall
+
+A package containing the definition of linux kernel syscall-numbers, as read from `/usr/include/x86_64-linux-gnu/asm/unistd_64.h`.
+
+```lisp
+(require syscall)
+```
+
+
 ### tree
 
 A package containing simple AVL-tree routines, used by [our lisp interpreter](../INCEPTION.md).

packages/syscall.header

@@ -0,0 +1,4 @@
+;;; syscall-constants
+;;
+;; These constants define known syscalls, and are auto-generated.
+;;