aravindh at virtuata
Apr 25, 2012, 11:38 AM
Views: 61
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[PATCH 2 of 2] [v3] xen/x86: Add FS and GS base to HVM VCPU context
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Add FS and GS base to the HVM VCPU context returned by xc_vcpu_getcontext()
Signed-off-by: Aravindh Puthiyaparambil <aravindh [at] virtuata>
diff -r be41f3b599d9 -r 1f39b9fe704f xen/arch/x86/domctl.c
--- a/xen/arch/x86/domctl.c Wed Apr 25 11:35:29 2012 -0700
+++ b/xen/arch/x86/domctl.c Wed Apr 25 11:35:43 2012 -0700
@@ -1590,8 +1590,23 @@ void arch_get_info_guest(struct vcpu *v,
c.nat->user_regs.es = sreg.sel;
hvm_get_segment_register(v, x86_seg_fs, &sreg);
c.nat->user_regs.fs = sreg.sel;
+#ifdef __x86_64__
+ c.nat->fs_base = sreg.base;
+#endif
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;
+ c.nat->gs_base_user = hvm_get_shadow_gs_base(v);
+ }
+ else
+ {
+ c.nat->gs_base_user = sreg.base;
+ c.nat->gs_base_kernel = hvm_get_shadow_gs_base(v);
+ }
+#endif
}
else
{
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[PATCH 2 of 2] [v3] xen/x86: Add FS and GS base to HVM VCPU context
