Reserving syscall numbers for shared memory

kernel/include/shm.h

@@ -0,0 +1,17 @@
+/* vim: tabstop=4 shiftwidth=4 noexpandtab
+ */
+
+#ifndef SHM_H
+#define SHM_H
+
+#include <types.h>
+
+typedef struct {
+	char name[256];
+} shm_node_t;
+
+char * shm_negotiate(char * shm_path, uintptr_t address, size_t * size);
+int shm_free(char * shm_path);
+
+
+#endif

kernel/mem/shm.c

@@ -0,0 +1,34 @@
+/* vim: tabstop=4 shiftwidth=4 noexpandtab
+ *
+ * Shared Memory Negotiation
+ *
+ */
+#include <system.h>
+#include <syscall.h>
+#include <process.h>
+#include <logging.h>
+#include <fs.h>
+#include <pipe.h>
+#include <shm.h>
+#include <tree.h>
+#include <list.h>
+
+tree_t * shm_tree = NULL;
+
+void shm_install() {
+	LOG(INFO, "Installing SHM");
+}
+
+char * shm_negotiate(char * shm_path, uintptr_t address, size_t * size) {
+	/* Sanity check */
+	if (__builtin_expect(shm_tree == NULL, 0)) {
+		shm_tree = tree_create();
+	}
+
+	return 0;
+}
+
+int shm_free(char * shm_path) {
+	
+	return 0;
+}

kernel/sys/syscall.c

@@ -10,6 +10,7 @@
 #include <fs.h>
 #include <pipe.h>
 #include <version.h>
+#include <shm.h>
 
 #define SPECIAL_CASE_STDIO
 
@@ -426,6 +427,8 @@ static uintptr_t syscalls[] = {
 	(uintptr_t)&gethostname,		/* 32 */
 	(uintptr_t)&mousedevice,
 	(uintptr_t)&sys_mkdir,
+	(uintptr_t)&shm_negotiate,
+	(uintptr_t)&shm_free,			/* 33 */
 	0
 };
 uint32_t num_syscalls;