@@ -14,6 +14,21 @@
#ifndef TARGET_X86_64
#include "exec/windbgstub-utils.h"
+#define IS_LOCAL_BP_ENABLED(dr7, index) (((dr7) >> ((index) * 2)) & 1)
+
+#define IS_GLOBAL_BP_ENABLED(dr7, index) (((dr7) >> ((index) * 2)) & 2)
+
+#define IS_BP_ENABLED(dr7, index) \
+ (IS_LOCAL_BP_ENABLED(dr7, index) | IS_GLOBAL_BP_ENABLED(dr7, index))
+
+#define BP_TYPE(dr7, index) \
+ ((int) ((dr7) >> (DR7_TYPE_SHIFT + ((index) * 4))) & 3)
+
+#define BP_LEN(dr7, index) ({ \
+ int _len = (((dr7) >> (DR7_LEN_SHIFT + ((index) * 4))) & 3); \
+ (_len == 2) ? 8 : _len + 1; \
+})
+
#ifdef TARGET_X86_64
# define OFFSET_SELF_PCR 0x18
# define OFFSET_VERS 0x108
@@ -273,9 +288,42 @@ typedef struct _CPU_KPROCESSOR_STATE {
CPU_KSPECIAL_REGISTERS SpecialRegisters;
} CPU_KPROCESSOR_STATE, *PCPU_KPROCESSOR_STATE;
-static void windbg_set_dr(CPUState *cpu, int index, target_ulong value)
+static int windbg_hw_breakpoint_insert(CPUState *cpu, int index)
+{
+ return 0;
+}
+
+static int windbg_hw_breakpoint_remove(CPUState *cpu, int index)
+{
+ return 0;
+}
+
+static void windbg_set_dr7(CPUState *cpu, target_ulong new_dr7)
{}
+static void windbg_set_dr(CPUState *cpu, int index, target_ulong value)
+{
+ CPUArchState *env = cpu->env_ptr;
+
+ switch (index) {
+ case 0 ... 3:
+ if (IS_BP_ENABLED(env->dr[7], index) && env->dr[index] != value) {
+ windbg_hw_breakpoint_remove(cpu, index);
+ env->dr[index] = value;
+ windbg_hw_breakpoint_insert(cpu, index);
+ } else {
+ env->dr[index] = value;
+ }
+ return;
+ case 6:
+ env->dr[6] = value | DR6_FIXED_1;
+ return;
+ case 7:
+ windbg_set_dr7(cpu, value);
+ return;
+ }
+}
+
static void windbg_set_sr(CPUState *cpu, int sr, uint16_t selector)
{
CPUArchState *env = cpu->env_ptr;