* child_info.h (CURR_CHILD_INFO_MAGIC): Reset.

(child_info_fork::mount_table): Remove.
(child_info_fork::myself_addr): Remove.
* fork.cc (fork_child): Don't set either of the above.
* dcrt0.cc (dll_crt0_1): Call memory_init as early as possible.
* fhandler_console.cc (console_state): Move to shared_info.h.
(fhandler_console::get_tty_stuff): Reflect open_shared arg change.
* pinfo.cc (myself_addr): Remove definition.
(pinfo::init): Get myself address from open_shared.
* pinfo.h (myself_addr): Remove declaration.
* shared.cc (open_shared): Rework so that known shared memory locations are
protected.  Take shared memory type as fifth argument.
(memory_init): Reflect open_shared arg change.
* shared_info.h (shared_locations): New enum.
(console_state): Move here.
(open_shared): Reflect open_shared arg change in declaration.

winsup/cygwin/child_info.h

@@ -29,7 +29,7 @@ enum
 
 #define EXEC_MAGIC_SIZE sizeof(child_info)
 
-#define CURR_CHILD_INFO_MAGIC 0x64848c11U
+#define CURR_CHILD_INFO_MAGIC 0x8e0899faU
 
 /* NOTE: Do not make gratuitous changes to the names or organization of the
    below class.  The layout is checksummed to determine compatibility between
@@ -61,8 +61,6 @@ class child_info_fork: public child_info
 public:
   HANDLE forker_finished;// for synchronization with child
   DWORD stacksize;	// size of parent stack
-  mount_info *mount_table;// location of mount table in parent
-  _pinfo *myself_addr;	// where myself shared memory lives in the parent
   jmp_buf jmp;		// where child will jump to
   void *stacktop;	// location of top of parent stack
   void *stackbottom;	// location of bottom of parent stack