diff --git a/src/debug/ptrace.c b/src/debug/ptrace.c
new file mode 100644
index 0000000000000000000000000000000000000000..a6996250f4e0a590e08ae8d91a2b892fc4ab8df6
--- /dev/null
+++ b/src/debug/ptrace.c
@@ -0,0 +1,7 @@
+#include <nxos/syscall.h>
+#include <nxos/ptrace.h>
+
+NX_Error NX_Ptrace(enum __ptrace_request request, NX_I32 tid, void *addr, void *data)
+{
+    return NX_Syscall(NX_API_Ptrace, request, tid, addr, data);
+}
\ No newline at end of file
diff --git a/src/include/nxos/debug.h b/src/include/nxos/debug.h
index 29acbf799340119ec1ff98501d64fda2ff6d47cf..7cb722a6f8f3b914d47506894de302b017f82e60 100644
--- a/src/include/nxos/debug.h
+++ b/src/include/nxos/debug.h
@@ -13,12 +13,13 @@
 #define __NXOS_DEBUG_H__
 
 #include <nxos/xbook.h>
-
+#include <nxos/ptrace.h>
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 NX_Error NX_DebugLog(char *buf, NX_Size len);
+NX_Error NX_Ptrace(enum __ptrace_request request, NX_I32 tid, void *addr, void *data);
 
 #ifdef __cplusplus
 }
diff --git a/src/include/nxos/process.h b/src/include/nxos/process.h
index 824246c810a5d0df115960af00f9575f3e9cf522..c461a8f54f011b6002a17714dd31b71b9b489454 100644
--- a/src/include/nxos/process.h
+++ b/src/include/nxos/process.h
@@ -43,6 +43,7 @@ extern "C" {
 #define NX_THREAD_CREATE_NORMAL     0x00 /* thread create with normal flag(no wait, no suspend, running) */   
 #define NX_THREAD_CREATE_SUSPEND    0x01 /* thread create with suspend flag(no running) */
 #define NX_THREAD_CREATE_WAIT       0x02 /* thread create with wait thread exit(no return, must wait exit) */
+#define NX_THREAD_CREATE_DEBUG      0x04 /* thread create to be debugged by gdb */
 
 #define NX_THREAD_DEFAULT_STACK_SZ  8192   /* default thread stack size */
 
diff --git a/src/include/nxos/ptrace.h b/src/include/nxos/ptrace.h
new file mode 100644
index 0000000000000000000000000000000000000000..3d91d018250dfe8822254bf4ba67d26ac05714b4
--- /dev/null
+++ b/src/include/nxos/ptrace.h
@@ -0,0 +1,46 @@
+#ifndef __NXOS_PTRACE_H__
+#define __NXOS_PTRACE_H__
+
+
+enum __ptrace_request{
+
+  PTRACE_PEEKINT8 = 0,
+
+  PTRACE_PEEKINT16 = 1,
+
+  PTRACE_PEEKINT32 = 2,
+
+  PTRACE_PEEKINT64 = 3,
+
+  PTRACE_POKEINT8 = 4,
+
+  PTRACE_POKEINT16 = 5,
+
+  PTRACE_POKEINT32 = 6,
+
+  PTRACE_POKEINT64 = 7,
+
+  /* Continue the process.  */
+  PTRACE_CONT = 8,
+
+  /* Kill the process.  */
+  PTRACE_KILL = 9,
+
+  /* Single step the process.  */
+  PTRACE_SINGLESTEP = 10,
+
+  /* Get all general purpose registers used by a processes.  */
+  PTRACE_GETREGS = 11,
+
+  /* Set all general purpose registers used by a processes.  */
+  PTRACE_SETREGS = 12,
+
+  /* Get all floating point registers used by a processes.  */
+  PTRACE_GETFPREGS = 13,
+
+  /* Set all floating point registers used by a processes.  */
+  PTRACE_SETFPREGS = 14,
+
+};
+
+#endif
\ No newline at end of file
diff --git a/src/include/nxos/signal.h b/src/include/nxos/signal.h
index 6edace2c3745a08f3bcc2099d608ed5a555281b9..72729a98091d346ec13845183777c83a444b10a5 100644
--- a/src/include/nxos/signal.h
+++ b/src/include/nxos/signal.h
@@ -35,6 +35,7 @@ extern "C" {
 #define NX_SIGNAL_SEGV          14 /* segment fault */
 #define NX_SIGNAL_ILLEGAL       15 /* illegal instruction */
 #define NX_SIGNAL_INST          16 /* instruction aceesss */
+#define NX_SIGNAL_CHILD         17 /* child process */
 
 /* ...-31 RESERVED */
 #define NX_SIGNAL_ANONYMOUS     32 /* anonymous signal */
diff --git a/src/include/nxos/syscall.h b/src/include/nxos/syscall.h
index 28d8af2d4a64210f3f0772669c865faa67ddf33f..806fb753bfdb5cbde893337848a86cc9241a23be 100644
--- a/src/include/nxos/syscall.h
+++ b/src/include/nxos/syscall.h
@@ -162,6 +162,7 @@ enum NX_SysApi
     NX_API_ConditionWaitTimeout,
     NX_API_ConditionSignal,     /* 100 */
     NX_API_ConditionBroadcast,
+    NX_API_Ptrace,
 };
 
 #ifdef __cplusplus