diff --git a/sys/debug_info.h b/sys/debug_info.h
new file mode 100644
index 0000000..34fb7ee
--- /dev/null
+++ b/sys/debug_info.h
@@ -0,0 +1,218 @@
+#ifndef LPC_DEBUG_INFO_H_
+#define LPC_DEBUG_INFO_H_ 1
+
+#include "/sys/driver_info.h"
+
+/* Request values for efun debug_info().
+ */
+
+#define DINFO_OBJECT  0  /* Print information about an object */
+#define DINFO_MEMORY  1  /* Print memory usage of an object */
+#define DINFO_OBJLIST 2  /* Return an object from the global list */
+#define DINFO_MALLOC  3  /* Print the information from the 'malloc' cmd */
+#define DINFO_STATUS  4  /* Return the 'status' information */
+#define DINFO_DUMP    5  /* Dump some special information into files */
+#define DINFO_DATA    6  /* Return internal information */
+#define DINFO_TRACE   7  /* Return the current call trace */
+#define DINFO_EVAL_NUMBER 8 /* Return the current eval number */
+
+/* Sub-request values for debug_info(DINFO_DATA) */
+
+#define DID_STATUS  0  /* Return the 'status' and 'status tables' information */
+#define DID_SWAP    1  /* Return the 'status swap' information */
+#define DID_MEMORY  2  /* Return the 'status malloc' information */
+
+/* Sub-request values for debug_info(DINFO_TRACE) */
+
+#define DIT_CURRENT        0  /* Return the current call chain as an array */
+#define DIT_ERROR          1  /* Return the last error call chain as an array */
+#define DIT_UNCAUGHT_ERROR 2  /* Return the last uncaught error call chain */
+#define DIT_STR_CURRENT    3  /* Return the current call chain as a string */
+#define DIT_CURRENT_DEPTH  4  /* Return the current control stack depth */
+
+/* Indices into the array resulting from debug_info(DINFO_DATA, DID_STATUS)
+ */
+
+#define DID_ST_ACTIONS             0
+#define DID_ST_ACTIONS_SIZE        1
+#define DID_ST_SHADOWS             2
+#define DID_ST_SHADOWS_SIZE        3
+
+#define DID_ST_OBJECTS             4
+#define DID_ST_OBJECTS_SIZE        5
+#define DID_ST_OBJECTS_SWAPPED     6
+#define DID_ST_OBJECTS_SWAP_SIZE   7
+#define DID_ST_OBJECTS_LIST        8
+#define DID_ST_OBJECTS_NEWLY_DEST  9
+#define DID_ST_OBJECTS_DESTRUCTED 10
+#define DID_ST_OBJECTS_PROCESSED  11
+#define DID_ST_OBJECTS_AVG_PROC   12
+
+#define DID_ST_OTABLE             13
+#define DID_ST_OTABLE_SLOTS       14
+#define DID_ST_OTABLE_SIZE        15
+
+#define DID_ST_HBEAT_OBJS         16
+#define DID_ST_HBEAT_CALLS        17
+#define DID_ST_HBEAT_CALLS_TOTAL  18
+#define DID_ST_HBEAT_SLOTS        19
+#define DID_ST_HBEAT_SIZE         20
+#define DID_ST_HBEAT_PROCESSED    21
+#define DID_ST_HBEAT_AVG_PROC     22
+
+#define DID_ST_CALLOUTS           23
+#define DID_ST_CALLOUT_SIZE       24
+
+#define DID_ST_ARRAYS             25
+#define DID_ST_ARRAYS_SIZE        26
+
+#define DID_ST_MAPPINGS           27
+#define DID_ST_MAPPINGS_SIZE      28
+#define DID_ST_HYBRID_MAPPINGS    51
+#define DID_ST_HASH_MAPPINGS      54
+
+#define DID_ST_STRUCTS            29
+#define DID_ST_STRUCTS_SIZE       30
+#define DID_ST_STRUCT_TYPES       31
+#define DID_ST_STRUCT_TYPES_SIZE  32
+
+#define DID_ST_PROGS              33
+#define DID_ST_PROGS_SIZE         34
+
+#define DID_ST_PROGS_SWAPPED      35
+#define DID_ST_PROGS_SWAP_SIZE    36
+
+#define DID_ST_USER_RESERVE       37
+#define DID_ST_MASTER_RESERVE     38
+#define DID_ST_SYSTEM_RESERVE     39
+
+#define DID_ST_ADD_MESSAGE        40
+#define DID_ST_PACKETS            41
+#define DID_ST_PACKET_SIZE        42
+#define DID_ST_PACKETS_IN         43
+#define DID_ST_PACKET_SIZE_IN     44
+
+#define DID_ST_APPLY              45
+#define DID_ST_APPLY_HITS         46
+
+#define DID_ST_STRINGS            47
+#define DID_ST_STRING_SIZE        48
+#define DID_ST_STR_TABLE_SIZE     49
+#define DID_ST_STR_OVERHEAD       50
+#define DID_ST_UNTABLED           52
+#define DID_ST_UNTABLED_SIZE      53
+#define DID_ST_UNUSED54           54 /* UNUSED */
+#define DID_ST_UNUSED55           55 /* UNUSED */
+#define DID_ST_TABLED             56
+#define DID_ST_TABLED_SIZE        57
+#define DID_ST_STR_SEARCHES       58
+#define DID_ST_STR_SEARCHLEN      59
+#define DID_ST_STR_SEARCHES_BYVALUE   60
+#define DID_ST_STR_SEARCHLEN_BYVALUE  61
+#define DID_ST_STR_CHAINS         62
+#define DID_ST_STR_ADDED          63
+#define DID_ST_STR_DELETED        64
+#define DID_ST_STR_COLLISIONS     65
+#define DID_ST_STR_FOUND          66
+#define DID_ST_STR_FOUND_BYVALUE  67
+
+#define DID_ST_RX_CACHED          68
+#define DID_ST_RX_TABLE           69
+#define DID_ST_RX_TABLE_SIZE      70
+#define DID_ST_RX_REQUESTS        71
+#define DID_ST_RX_REQ_FOUND       72
+#define DID_ST_RX_REQ_COLL        73
+
+#define DID_ST_MB_FILE            74
+#define DID_ST_MB_SWAP            75
+
+#define DID_ST_BOOT_TIME          76
+
+#define DID_STATUS_MAX            77 /* Total number of entries */
+
+
+/* Indices into the array resulting from debug_info(DINFO_DATA, DID_SWAP)
+ */
+
+#define DID_SW_PROGS            0
+#define DID_SW_PROG_SIZE        1
+#define DID_SW_PROG_UNSWAPPED   2
+#define DID_SW_PROG_U_SIZE      3
+#define DID_SW_VARS             4
+#define DID_SW_VAR_SIZE         5
+#define DID_SW_FREE             6
+#define DID_SW_FREE_SIZE        7
+#define DID_SW_FILE_SIZE        8
+#define DID_SW_REUSED           9
+#define DID_SW_SEARCHES        10
+#define DID_SW_SEARCH_LEN      11
+#define DID_SW_F_SEARCHES      12
+#define DID_SW_F_SEARCH_LEN    13
+#define DID_SW_COMPACT         14
+#define DID_SW_RECYCLE_FREE    15
+
+#define DID_SWAP_MAX           16
+
+
+/* Indices into the array resulting from debug_info(DINFO_DATA, DID_MEMORY)
+ */
+
+#define DID_MEM_NAME            0
+#define DID_MEM_SBRK            1
+#define DID_MEM_SBRK_SIZE       2
+#define DID_MEM_LARGE           3
+#define DID_MEM_LARGE_SIZE      4
+#define DID_MEM_LFREE           5
+#define DID_MEM_LFREE_SIZE      6
+#define DID_MEM_LWASTED         7
+#define DID_MEM_LWASTED_SIZE    8
+#define DID_MEM_CHUNK           9
+#define DID_MEM_CHUNK_SIZE     10
+#define DID_MEM_SLAB            (DID_MEM_CHUNK)
+#define DID_MEM_SLAB_SIZE       (DID_MEM_CHUNK_SIZE)
+#define DID_MEM_SMALL          11
+#define DID_MEM_SMALL_SIZE     12
+#define DID_MEM_SFREE          13
+#define DID_MEM_SFREE_SIZE     14
+#define DID_MEM_SWASTED        15
+#define DID_MEM_SWASTED_SIZE   16
+#define DID_MEM_SMALL_OVERHEAD_SIZE  (DID_MEM_SWASTED_SIZE)
+#define DID_MEM_MINC_CALLS     17
+#define DID_MEM_MINC_SUCCESS   19
+#define DID_MEM_MINC_SIZE      19
+#define DID_MEM_PERM           20
+#define DID_MEM_PERM_SIZE      21
+#define DID_MEM_CLIB           22
+#define DID_MEM_CLIB_SIZE      23
+#define DID_MEM_OVERHEAD       24
+#define DID_MEM_ALLOCATED      25
+#define DID_MEM_USED           26
+#define DID_MEM_TOTAL_UNUSED   27
+#define DID_MEM_DEFRAG_CALLS             28
+#define DID_MEM_DEFRAG_CALLS_REQ         29
+#define DID_MEM_SLAB_FREE                 (DID_MEM_DEFRAG_CALLS)
+#define DID_MEM_SLAB_FREE_SIZE            (DID_MEM_DEFRAG_CALLS_REQ)
+#define DID_MEM_DEFRAG_REQ_SUCCESS       30
+#define DID_MEM_DEFRAG_BLOCKS_INSPECTED  31
+#define DID_MEM_DEFRAG_BLOCKS_MERGED     32
+#define DID_MEM_DEFRAG_BLOCKS_RESULT     33
+#define DID_MEM_AVL_NODES      34
+#define DID_MEM_EXT_STATISTICS 35
+
+#define DID_MEMORY_MAX         36
+
+/* Indices into the subarrays of DID_MEM_EXT_STATISTICS (if given) */
+
+#define DID_MEM_ES_MAX_ALLOC   0
+#define DID_MEM_ES_CUR_ALLOC   1
+#define DID_MEM_ES_MAX_FREE    2
+#define DID_MEM_ES_CUR_FREE    3
+#define DID_MEM_ES_AVG_XALLOC  4
+#define DID_MEM_ES_AVG_XFREE   5
+#define DID_MEM_ES_FULL_SLABS  6
+#define DID_MEM_ES_FREE_SLABS  7
+#define DID_MEM_ES_TOTAL_SLABS 8
+
+#define DID_MEM_ES_MAX  9
+
+#endif /* LPC_DEBUG_INFO_H_ */