Added function for generate ExceptionStateChange packet.

Signed-off-by: Mihail Abakumov <mikhail.abakumov@ispras.ru>
Signed-off-by: Pavel Dovgalyuk <dovgaluk@ispras.ru>
Signed-off-by: Dmitriy Koltunov <koltunov@ispras.ru>
---
 include/exec/windbgstub-utils.h |    2 ++
 target/i386/windbgstub.c        |   20 +++++++++++++++++++-
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/include/exec/windbgstub-utils.h b/include/exec/windbgstub-utils.h
index b729cd604e..f35873eca0 100755
--- a/include/exec/windbgstub-utils.h
+++ b/include/exec/windbgstub-utils.h
@@ -86,6 +86,8 @@ typedef struct SizedBuf {
 InitedAddr *windbg_get_KPCR(void);
 InitedAddr *windbg_get_version(void);
 
+SizedBuf kd_gen_exception_sc(CPUState *cpu);
+
 bool windbg_on_load(void);
 
 #endif
diff --git a/target/i386/windbgstub.c b/target/i386/windbgstub.c
index a3c433f756..f0edd94dde 100755
--- a/target/i386/windbgstub.c
+++ b/target/i386/windbgstub.c
@@ -70,7 +70,6 @@ bool windbg_on_load(void)
     return true;
 }
 
-__attribute__ ((unused)) /* unused yet */
 static void kd_init_state_change(CPUState *cpu,
                                  DBGKD_ANY_WAIT_STATE_CHANGE *sc)
 {
@@ -115,4 +114,23 @@ static void kd_init_state_change(CPUState *cpu,
     }
 }
 
+SizedBuf kd_gen_exception_sc(CPUState *cpu)
+{
+    CPUArchState *env = cpu->env_ptr;
+    DBGKD_ANY_WAIT_STATE_CHANGE *sc;
+    DBGKM_EXCEPTION_RECORD64 *exc;
+    SizedBuf buf;
+
+    SBUF_MALLOC(buf, sizeof(DBGKD_ANY_WAIT_STATE_CHANGE) + sizeof(int));
+    sc = (DBGKD_ANY_WAIT_STATE_CHANGE *) buf.data;
+    exc = &sc->u.Exception.ExceptionRecord;
+    kd_init_state_change(cpu, sc);
+
+    stl_p(&sc->NewState, DbgKdExceptionStateChange);
+    stl_p(&exc->ExceptionCode, 0x80000003);
+    sttul_p(&exc->ExceptionAddress, env->eip);
+
+    return buf;
+}
+
 #endif