[Qemu-devel] [PATCH v3 32/45] windbg: implemented windbg_set_dr7

[Mihail Abakumov]

Signed-off-by: Mihail Abakumov <address@hidden>
Signed-off-by: Pavel Dovgalyuk <address@hidden>
Signed-off-by: Dmitriy Koltunov <address@hidden>
---
 target/i386/windbgstub.c |   27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/target/i386/windbgstub.c b/target/i386/windbgstub.c
index 14ad195107..deb0e728e0 100755
--- a/target/i386/windbgstub.c
+++ b/target/i386/windbgstub.c
@@ -299,7 +299,32 @@ static int windbg_hw_breakpoint_remove(CPUState *cpu, int 
index)
 }
 
 static void windbg_set_dr7(CPUState *cpu, target_ulong new_dr7)
-{}
+{
+    CPUArchState *env = cpu->env_ptr;
+    target_ulong old_dr7 = env->dr[7];
+    int iobpt = 0;
+    int i;
+
+    new_dr7 |= DR7_FIXED_1;
+    if (new_dr7 == old_dr7) {
+        return;
+    }
+
+    for (i = 0; i < DR7_MAX_BP; i++) {
+        if (IS_BP_ENABLED(old_dr7, i) && !IS_BP_ENABLED(new_dr7, i)) {
+            windbg_hw_breakpoint_remove(cpu, i);
+        }
+    }
+
+    env->dr[7] = new_dr7;
+    for (i = 0; i < DR7_MAX_BP; i++) {
+        if (IS_BP_ENABLED(env->dr[7], i)) {
+            iobpt |= windbg_hw_breakpoint_insert(cpu, i);
+        }
+    }
+
+    env->hflags = (env->hflags & ~HF_IOBPT_MASK) | iobpt;
+}
 
 static void windbg_set_dr(CPUState *cpu, int index, target_ulong value)
 {