x86, 64-bit: add gate_offset() and gate_segment() macros
For calculating the offset from struct gate_struct fields. [ gate_offset and gate_segment were broken for 32-bit. ] Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: xen-devel <xen-devel@lists.xensource.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -75,10 +75,14 @@ struct ldttss_desc64 {
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typedef struct gate_struct64 gate_desc;
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typedef struct ldttss_desc64 ldt_desc;
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typedef struct ldttss_desc64 tss_desc;
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#define gate_offset(g) ((g).offset_low | ((unsigned long)(g).offset_middle << 16) | ((unsigned long)(g).offset_high << 32))
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#define gate_segment(g) ((g).segment)
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#else
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typedef struct desc_struct gate_desc;
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typedef struct desc_struct ldt_desc;
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typedef struct desc_struct tss_desc;
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#define gate_offset(g) (((g).b & 0xffff0000) | ((g).a & 0x0000ffff))
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#define gate_segment(g) ((g).a >> 16)
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#endif
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struct desc_ptr {
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