[Qemu-devel] [PATCH v3 30/45] windbg: implemented windbg_set_sr

[Mihail Abakumov]

Signed-off-by: Mihail Abakumov <mikhail.abaku...@ispras.ru>
Signed-off-by: Pavel Dovgalyuk <dovga...@ispras.ru>
Signed-off-by: Dmitriy Koltunov <koltu...@ispras.ru>
---
 target/i386/windbgstub.c |   17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/target/i386/windbgstub.c b/target/i386/windbgstub.c
index 63962b48dd..c59d1401ad 100755
--- a/target/i386/windbgstub.c
+++ b/target/i386/windbgstub.c
@@ -277,7 +277,22 @@ static void windbg_set_dr(CPUState *cpu, int index, 
target_ulong value)
 {}
 
 static void windbg_set_sr(CPUState *cpu, int sr, uint16_t selector)
-{}
+{
+    CPUArchState *env = cpu->env_ptr;
+
+    if (selector != env->segs[sr].selector &&
+        (!(env->cr[0] & CR0_PE_MASK) || (env->eflags & VM_MASK))) {
+        unsigned int limit, flags;
+        target_ulong base;
+
+        int dpl = (env->eflags & VM_MASK) ? 3 : 0;
+        base = selector << 4;
+        limit = 0xffff;
+        flags = DESC_P_MASK | DESC_S_MASK | DESC_W_MASK |
+                DESC_A_MASK | (dpl << DESC_DPL_SHIFT);
+        cpu_x86_load_seg_cache(env, sr, selector, base, limit, flags);
+    }
+}
 
 static int windbg_read_context(CPUState *cpu, uint8_t *buf, int buf_size,
                                int offset, int len)