--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lphobos/gc/gclinux.d	Mon Nov 12 06:32:46 2007 +0100
@@ -0,0 +1,107 @@
+
+// Copyright (C) 2001-2004 by Digital Mars, www.digitalmars.com
+// All Rights Reserved
+// Written by Walter Bright
+
+import std.c.linux.linuxextern;
+import std.c.linux.linux;
+
+/+
+extern (C)
+{
+    // from <sys/mman.h>
+    void* mmap(void* addr, uint len, int prot, int flags, int fd, uint offset);
+    int munmap(void* addr, uint len);
+    const void* MAP_FAILED = cast(void*)-1;
+
+    // from <bits/mman.h>
+    enum { PROT_NONE = 0, PROT_READ = 1, PROT_WRITE = 2, PROT_EXEC = 4 }
+    enum { MAP_SHARED = 1, MAP_PRIVATE = 2, MAP_TYPE = 0x0F,
+	   MAP_FIXED = 0x10, MAP_FILE = 0, MAP_ANON = 0x20 }
+}
++/
+
+/***********************************
+ * Map memory.
+ */
+
+void *os_mem_map(uint nbytes)
+{   void *p;
+
+    //errno = 0;
+    p = mmap(null, nbytes, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
+    return (p == MAP_FAILED) ? null : p;
+}
+
+/***********************************
+ * Commit memory.
+ * Returns:
+ *	0	success
+ *	!=0	failure
+ */
+
+int os_mem_commit(void *base, uint offset, uint nbytes)
+{
+    return 0;
+}
+
+
+/***********************************
+ * Decommit memory.
+ * Returns:
+ *	0	success
+ *	!=0	failure
+ */
+
+int os_mem_decommit(void *base, uint offset, uint nbytes)
+{
+    return 0;
+}
+
+/***********************************
+ * Unmap memory allocated with os_mem_map().
+ * Returns:
+ *	0	success
+ *	!=0	failure
+ */
+
+int os_mem_unmap(void *base, uint nbytes)
+{
+    return munmap(base, nbytes);
+}
+
+
+/**********************************************
+ * Determine "bottom" of stack (actually the top on x86 systems).
+ */
+
+void *os_query_stackBottom()
+{
+    version (none)
+    {	// See discussion: http://autopackage.org/forums/viewtopic.php?t=22
+	static void** libc_stack_end;
+
+	if (libc_stack_end == libc_stack_end.init)
+	{
+	    void* handle = dlopen(null, RTLD_NOW);
+	    libc_stack_end = cast(void **)dlsym(handle, "__libc_stack_end");
+	    dlclose(handle);
+	}
+	return *libc_stack_end;
+    }
+    else
+    {	// This doesn't resolve on all versions of Linux
+	return __libc_stack_end;
+    }
+}
+
+
+/**********************************************
+ * Determine base address and size of static data segment.
+ */
+
+void os_query_staticdataseg(void **base, uint *nbytes)
+{
+    *base = cast(void *)&__data_start;
+    *nbytes = cast(byte *)&_end - cast(byte *)&__data_start;
+}