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[Qemu-devel] [PATCH v4 23/46] windbg: implemented kd_api_get_context and


From: Mihail Abakumov
Subject: [Qemu-devel] [PATCH v4 23/46] windbg: implemented kd_api_get_context and kd_api_set_context
Date: Mon, 11 Dec 2017 16:23:28 +0300
User-agent: StGit/0.17.1-dirty

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 ++
 target/i386/windbgstub.c        |   39 +++++++++++++++++++++++++++++++++++++++
 windbgstub.c                    |    8 ++++++++
 3 files changed, 49 insertions(+)

diff --git a/include/exec/windbgstub-utils.h b/include/exec/windbgstub-utils.h
index 1cee2aed18..d4efabba0b 100755
--- a/include/exec/windbgstub-utils.h
+++ b/include/exec/windbgstub-utils.h
@@ -76,6 +76,8 @@ InitedAddr *windbg_get_version(void);
 
 void kd_api_read_virtual_memory(CPUState *cpu, PacketData *pd);
 void kd_api_write_virtual_memory(CPUState *cpu, PacketData *pd);
+void kd_api_get_context(CPUState *cpu, PacketData *pd);
+void kd_api_set_context(CPUState *cpu, PacketData *pd);
 void kd_api_unsupported(CPUState *cpu, PacketData *pd);
 
 SizedBuf kd_gen_exception_sc(CPUState *cpu);
diff --git a/target/i386/windbgstub.c b/target/i386/windbgstub.c
index 11c35a4207..7558349469 100755
--- a/target/i386/windbgstub.c
+++ b/target/i386/windbgstub.c
@@ -273,6 +273,45 @@ typedef struct _CPU_KPROCESSOR_STATE {
     CPU_KSPECIAL_REGISTERS SpecialRegisters;
 } CPU_KPROCESSOR_STATE, *PCPU_KPROCESSOR_STATE;
 
+static int windbg_read_context(CPUState *cpu, uint8_t *buf, int buf_size,
+                               int offset, int len)
+{
+    return 0;
+}
+
+static int windbg_write_context(CPUState *cpu, uint8_t *buf, int buf_size,
+                                int offset, int len)
+{
+    return 0;
+}
+
+void kd_api_get_context(CPUState *cpu, PacketData *pd)
+{
+    int err;
+
+    pd->extra_size = sizeof(CPU_CONTEXT);
+    err = windbg_read_context(cpu, pd->extra, pd->extra_size, 0,
+                              pd->extra_size);
+
+    if (err) {
+        pd->extra_size = 0;
+        pd->m64.ReturnStatus = STATUS_UNSUCCESSFUL;
+    }
+}
+
+void kd_api_set_context(CPUState *cpu, PacketData *pd)
+{
+    int err;
+
+    err = windbg_write_context(cpu, pd->extra, pd->extra_size, 0,
+                               sizeof(CPU_CONTEXT));
+    pd->extra_size = 0;
+
+    if (err) {
+        pd->m64.ReturnStatus = STATUS_UNSUCCESSFUL;
+    }
+}
+
 bool windbg_on_load(void)
 {
     CPUState *cpu = qemu_get_cpu(0);
diff --git a/windbgstub.c b/windbgstub.c
index 14caacef81..be40e3e53b 100755
--- a/windbgstub.c
+++ b/windbgstub.c
@@ -148,6 +148,14 @@ static void 
windbg_process_manipulate_packet(ParsingContext *ctx)
         kd_api_write_virtual_memory(cpu, &ctx->data);
         break;
 
+    case DbgKdGetContextApi:
+        kd_api_get_context(cpu, &ctx->data);
+        break;
+
+    case DbgKdSetContextApi:
+        kd_api_set_context(cpu, &ctx->data);
+        break;
+
     default:
         kd_api_unsupported(cpu, &ctx->data);
         break;




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