updates to enable functionality necessary for SEABIOS to run

[palacios.git] / palacios / include / palacios / vmm_instr_decoder.h

diff --git a/palacios/include/palacios/vmm_instr_decoder.h b/palacios/include/palacios/vmm_instr_decoder.h
index 6e9785e..a7c63fb 100644 (file)
--- a/palacios/include/palacios/vmm_instr_decoder.h
+++ b/palacios/include/palacios/vmm_instr_decoder.h
@@ -478,6 +478,24 @@ static inline int decode_cr(struct guest_info * core,
     return 0;
 }
 
+static struct v3_segment * get_instr_segment(struct guest_info * core, struct x86_instr * instr) {
+    struct v3_segment * seg = &(core->segments.ds);
+
+    if (instr->prefixes.cs_override) {
+       seg = &(core->segments.cs);
+    } else if (instr->prefixes.es_override) {
+       seg = &(core->segments.es);
+    } else if (instr->prefixes.ss_override) {
+       seg = &(core->segments.ss);
+    } else if (instr->prefixes.fs_override) {
+       seg = &(core->segments.fs);
+    } else if (instr->prefixes.gs_override) {
+       seg = &(core->segments.gs);
+    } 
+
+    return seg;
+}
+
 
 
 #define ADDR_MASK(val, length) ({                            \