[Xen-devel] [PATCH] xen: Add GS base to HVM VCPU context

[Aravindh Puthiyaparambil <aravindh@xxxxxxxxxxxx>]

Add GS base to the HVM VCPU context returned by xc_vcpu_getcontext()

Signed-off-by: Aravindh Puthiyaparambil <aravindh@xxxxxxxxxxxx>

diff -r e62ab14d44af -r babbb3e0f4d3 xen/arch/x86/domctl.c
--- a/xen/arch/x86/domctl.c     Fri Apr 20 11:36:02 2012 -0700
+++ b/xen/arch/x86/domctl.c     Fri Apr 20 17:55:49 2012 -0700
@@ -1592,6 +1592,12 @@ void arch_get_info_guest(struct vcpu *v,
         c.nat->user_regs.fs = sreg.sel;
         hvm_get_segment_register(v, x86_seg_gs, &sreg);
         c.nat->user_regs.gs = sreg.sel;
+#ifdef __x86_64__
+        if ( ring_0(&c.nat->user_regs) )
+            c.nat->gs_base_kernel = sreg.base;
+        else
+            c.nat->gs_base_user = sreg.base;
+#endif
     }
     else
     {

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