commpage: randomize position of commpage

This patch introduces randomization of commpage position. From now on commpage
table contains offsets from begining to of the commpage to the particular
commpage entry. Similary addresses of symbols in ELF memory image "commpage"
are just offsets from the begining of the commpage.

This patch also updates KDL so that commpage entries are recognized and shown
correctly in stack trace. An update of Debugger is yet to be done.

headers/private/kernel/commpage.h

@@ -18,8 +18,9 @@ extern "C" {
 status_t	commpage_init(void);
 status_t	commpage_init_post_cpus(void);
 void*		allocate_commpage_entry(int entry, size_t size);
-void*		fill_commpage_entry(int entry, const void* copyFrom, size_t size);
+addr_t		fill_commpage_entry(int entry, const void* copyFrom, size_t size);
 image_id	get_commpage_image();
+area_id		clone_commpage_area(team_id team, void** address);
 
 // implemented in the architecture specific part
 status_t	arch_commpage_init(void);

headers/private/kernel/ksignal.h

@@ -52,6 +52,7 @@ struct signal_frame_data {
 	int32		thread_flags;
 	uint64		syscall_restart_return_value;
 	uint8		syscall_restart_parameters[SYSCALL_RESTART_PARAMETER_SIZE];
+	void*		commpage_address;
 };
 
 

headers/private/kernel/thread_types.h

@@ -259,6 +259,8 @@ struct Team : TeamThreadIteratorEntry<team_id>, KernelReferenceable,
 	size_t			used_user_data;
 	struct free_user_thread* free_user_threads;
 
+	void*			commpage_address;
+
 	struct team_debug_info debug_info;
 
 	// protected by scheduler lock

headers/private/libroot/libroot_private.h

@@ -34,7 +34,7 @@ void __init_env(const struct user_space_program_args *args);
 void __init_heap(void);
 void __init_heap_post_env(void);
 
-void __init_time(void);
+void __init_time(addr_t commPageTable);
 void __arch_init_time(struct real_time_data *data, bool setDefaults);
 bigtime_t __arch_get_system_time_offset(struct real_time_data *data);
 bigtime_t __get_system_time_offset();

headers/private/runtime_loader/runtime_loader.h

@@ -51,6 +51,7 @@ struct rld_export {
 	void (*call_termination_hooks)();
 
 	const struct user_space_program_args *program_args;
+	const void* commpage_address;
 };
 
 extern struct rld_export *__gRuntimeLoader;

headers/private/system/arch/arm/arch_commpage_defs.h

@@ -12,8 +12,4 @@
 //#define COMMPAGE_ENTRY_M68K_SYSCALL	(COMMPAGE_ENTRY_FIRST_ARCH_SPECIFIC + 0)
 //#define COMMPAGE_ENTRY_M68K_MEMCPY	(COMMPAGE_ENTRY_FIRST_ARCH_SPECIFIC + 1)
 
-/* 0xffff0000 colides with IO space mapped with TT1 on Atari */
-#warning ARM: determine good place for compage..
-#define ARCH_USER_COMMPAGE_ADDR (0xfeff0000)
-
 #endif	/* _SYSTEM_ARCH_M68K_COMMPAGE_DEFS_H */

headers/private/system/arch/m68k/arch_commpage_defs.h

@@ -12,7 +12,4 @@
 #define COMMPAGE_ENTRY_M68K_SYSCALL	(COMMPAGE_ENTRY_FIRST_ARCH_SPECIFIC + 0)
 #define COMMPAGE_ENTRY_M68K_MEMCPY	(COMMPAGE_ENTRY_FIRST_ARCH_SPECIFIC + 1)
 
-/* 0xffff0000 colides with IO space mapped with TT1 on Atari */
-#define ARCH_USER_COMMPAGE_ADDR (0xfeff0000)
-
 #endif	/* _SYSTEM_ARCH_M68K_COMMPAGE_DEFS_H */

headers/private/system/arch/mipsel/arch_commpage_defs.h

@@ -14,7 +14,5 @@
 #define COMMPAGE_ENTRY_MIPSEL_SYSCALL	(COMMPAGE_ENTRY_FIRST_ARCH_SPECIFIC + 0)
 #define COMMPAGE_ENTRY_MIPSEL_MEMCPY	(COMMPAGE_ENTRY_FIRST_ARCH_SPECIFIC + 1)
 
-#define ARCH_USER_COMMPAGE_ADDR (0xffff0000)
-
 #endif	/* _SYSTEM_ARCH_MIPSEL_COMMPAGE_DEFS_H */
 

headers/private/system/arch/ppc/arch_commpage_defs.h

@@ -12,6 +12,4 @@
 #define COMMPAGE_ENTRY_PPC_SYSCALL	(COMMPAGE_ENTRY_FIRST_ARCH_SPECIFIC + 0)
 #define COMMPAGE_ENTRY_PPC_MEMCPY	(COMMPAGE_ENTRY_FIRST_ARCH_SPECIFIC + 1)
 
-#define ARCH_USER_COMMPAGE_ADDR (0xffff0000)
-
 #endif	/* _SYSTEM_ARCH_PPC_COMMPAGE_DEFS_H */

headers/private/system/arch/x86/arch_commpage_defs.h

@@ -19,6 +19,4 @@
 #define COMMPAGE_ENTRY_X86_THREAD_EXIT \
 									(COMMPAGE_ENTRY_FIRST_ARCH_SPECIFIC + 5)
 
-#define ARCH_USER_COMMPAGE_ADDR (0xffff0000)
-
 #endif	/* _SYSTEM_ARCH_x86_COMMPAGE_DEFS_H */

headers/private/system/arch/x86_64/arch_commpage_defs.h

@@ -16,6 +16,4 @@
 #define COMMPAGE_ENTRY_X86_THREAD_EXIT \
 									(COMMPAGE_ENTRY_FIRST_ARCH_SPECIFIC + 3)
 
-#define ARCH_USER_COMMPAGE_ADDR		(0xffffffffffff0000)
-
 #endif	/* _SYSTEM_ARCH_x86_64_COMMPAGE_DEFS_H */

headers/private/system/commpage_defs.h

@@ -19,11 +19,6 @@
 #define COMMPAGE_SIGNATURE 'COMM'
 #define COMMPAGE_VERSION 1
 
-#define USER_COMMPAGE_ADDR	ARCH_USER_COMMPAGE_ADDR
-	// set by the architecture specific implementation
-
-#define USER_COMMPAGE_TABLE	((void**)(USER_COMMPAGE_ADDR))
-
 #include <arch_commpage_defs.h>
 
 #endif	/* _SYSTEM_COMMPAGE_DEFS_H */