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[Qemu-devel] [PATCH v4 08/46] windbg: hook to wrmsr operation
From: |
Mihail Abakumov |
Subject: |
[Qemu-devel] [PATCH v4 08/46] windbg: hook to wrmsr operation |
Date: |
Mon, 11 Dec 2017 16:22:03 +0300 |
User-agent: |
StGit/0.17.1-dirty |
Inserted hook to wrmsr operation. Windows Kernel put address on KPCR struct to
fs/gs (x32/x64) register. Needs catch this moment and allow windbg server
handle packets.
Signed-off-by: Mihail Abakumov <address@hidden>
Signed-off-by: Pavel Dovgalyuk <address@hidden>
Signed-off-by: Dmitriy Koltunov <address@hidden>
---
include/exec/windbgstub-utils.h | 2 ++
include/exec/windbgstub.h | 1 +
stubs/windbgstub.c | 3 +++
target/i386/misc_helper.c | 3 +++
target/i386/windbgstub.c | 10 ++++++++++
windbgstub.c | 13 +++++++++++++
6 files changed, 32 insertions(+)
diff --git a/include/exec/windbgstub-utils.h b/include/exec/windbgstub-utils.h
index 4c747fa23e..a181e172e9 100755
--- a/include/exec/windbgstub-utils.h
+++ b/include/exec/windbgstub-utils.h
@@ -47,4 +47,6 @@ typedef struct SizedBuf {
size_t size;
} SizedBuf;
+bool windbg_on_load(void);
+
#endif
diff --git a/include/exec/windbgstub.h b/include/exec/windbgstub.h
index 21bc552e58..309f692383 100755
--- a/include/exec/windbgstub.h
+++ b/include/exec/windbgstub.h
@@ -18,6 +18,7 @@
#define WINDBG_DEBUG_ON false
#endif
+void windbg_try_load(void);
int windbg_server_start(const char *device);
#endif
diff --git a/stubs/windbgstub.c b/stubs/windbgstub.c
index 4951f59203..bd7e2dccd1 100755
--- a/stubs/windbgstub.c
+++ b/stubs/windbgstub.c
@@ -12,6 +12,9 @@
#include "qemu/osdep.h"
#include "exec/windbgstub.h"
+void windbg_try_load(void)
+{}
+
int windbg_server_start(const char *device)
{
return 0;
diff --git a/target/i386/misc_helper.c b/target/i386/misc_helper.c
index 628f64aad5..ec1fcd2899 100644
--- a/target/i386/misc_helper.c
+++ b/target/i386/misc_helper.c
@@ -24,6 +24,7 @@
#include "exec/exec-all.h"
#include "exec/cpu_ldst.h"
#include "exec/address-spaces.h"
+#include "exec/windbgstub.h"
void helper_outb(CPUX86State *env, uint32_t port, uint32_t data)
{
@@ -385,6 +386,8 @@ void helper_wrmsr(CPUX86State *env)
/* XXX: exception? */
break;
}
+
+ windbg_try_load();
}
void helper_rdmsr(CPUX86State *env)
diff --git a/target/i386/windbgstub.c b/target/i386/windbgstub.c
index df89e1edd8..0938f738e6 100755
--- a/target/i386/windbgstub.c
+++ b/target/i386/windbgstub.c
@@ -10,3 +10,13 @@
*/
#include "qemu/osdep.h"
+
+#ifndef TARGET_X86_64
+#include "exec/windbgstub-utils.h"
+
+bool windbg_on_load(void)
+{
+ return false;
+}
+
+#endif
diff --git a/windbgstub.c b/windbgstub.c
index e30b8500e0..a2a6eb81b4 100755
--- a/windbgstub.c
+++ b/windbgstub.c
@@ -16,6 +16,7 @@
#include "qemu/cutils.h"
#include "exec/windbgstub.h"
#include "exec/windbgstub-utils.h"
+#include "sysemu/kvm.h"
typedef struct WindbgState {
bool is_loaded;
@@ -45,6 +46,13 @@ static void windbg_exit(void)
g_free(windbg_state);
}
+void windbg_try_load(void)
+{
+ if (windbg_state && !windbg_state->is_loaded) {
+ windbg_state->is_loaded = windbg_on_load();
+ }
+}
+
int windbg_server_start(const char *device)
{
Chardev *chr = NULL;
@@ -54,6 +62,11 @@ int windbg_server_start(const char *device)
exit(1);
}
+ if (kvm_enabled()) {
+ WINDBG_ERROR("KVM is not supported.");
+ exit(1);
+ }
+
if (!strstart(device, "pipe:", NULL)) {
WINDBG_ERROR("Unsupported device. Supported only pipe.");
exit(1);
- [Qemu-devel] [PATCH v4 00/46] Windbg supporting, Mihail Abakumov, 2017/12/11
- [Qemu-devel] [PATCH v4 01/46] windbg: added empty windbgstub files, Mihail Abakumov, 2017/12/11
- [Qemu-devel] [PATCH v4 02/46] windbg: added windbg's KD header file, Mihail Abakumov, 2017/12/11
- [Qemu-devel] [PATCH v4 03/46] windbg: modified windbgkd.h, Mihail Abakumov, 2017/12/11
- [Qemu-devel] [PATCH v4 04/46] windbg: added '-windbg' option, Mihail Abakumov, 2017/12/11
- [Qemu-devel] [PATCH v4 05/46] windbg: added helper features, Mihail Abakumov, 2017/12/11
- [Qemu-devel] [PATCH v4 06/46] windbg: added WindbgState, Mihail Abakumov, 2017/12/11
- [Qemu-devel] [PATCH v4 07/46] windbg: added chardev, Mihail Abakumov, 2017/12/11
- [Qemu-devel] [PATCH v4 08/46] windbg: hook to wrmsr operation,
Mihail Abakumov <=
- [Qemu-devel] [PATCH v4 09/46] windbg: handler of fs/gs register, Mihail Abakumov, 2017/12/11
- [Qemu-devel] [PATCH v4 10/46] windbg: structures for parsing data stream, Mihail Abakumov, 2017/12/11
- [Qemu-devel] [PATCH v4 11/46] windbg: parsing data stream, Mihail Abakumov, 2017/12/11
- [Qemu-devel] [PATCH v4 12/46] windbg: send data and control packets, Mihail Abakumov, 2017/12/11
- [Qemu-devel] [PATCH v4 13/46] windbg: handler of parsing context, Mihail Abakumov, 2017/12/11
- [Qemu-devel] [PATCH v4 14/46] windbg: init DBGKD_ANY_WAIT_STATE_CHANGE, Mihail Abakumov, 2017/12/11
- [Qemu-devel] [PATCH v4 15/46] windbg: generate ExceptionStateChange, Mihail Abakumov, 2017/12/11
- [Qemu-devel] [PATCH v4 16/46] windbg: generate LoadSymbolsStateChange, Mihail Abakumov, 2017/12/11
- [Qemu-devel] [PATCH v4 17/46] windbg: windbg_vm_stop, Mihail Abakumov, 2017/12/11
- [Qemu-devel] [PATCH v4 18/46] windbg: implemented windbg_process_control_packet, Mihail Abakumov, 2017/12/11