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Commit 43adfc26 authored by Jeremy Fitzhardinge's avatar Jeremy Fitzhardinge Committed by Ingo Molnar
Browse files

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: default avatarEduardo Habkost <ehabkost@redhat.com>
Signed-off-by: default avatarJeremy 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: default avatarIngo Molnar <mingo@elte.hu>
parent 4583ed51

include/asm-x86/desc_defs.h

+4 −0
Original line number Diff line number Diff line
@@ -75,10 +75,14 @@ struct ldttss_desc64 { 
typedef struct gate_struct64 gate_desc;

typedef struct ldttss_desc64 ldt_desc;

typedef struct ldttss_desc64 tss_desc;

#define gate_offset(g) ((g).offset_low | ((unsigned long)(g).offset_middle << 16) | ((unsigned long)(g).offset_high << 32))

#define gate_segment(g) ((g).segment)

#else

typedef struct desc_struct gate_desc;

typedef struct desc_struct ldt_desc;

typedef struct desc_struct tss_desc;

#define gate_offset(g)		(((g).b & 0xffff0000) | ((g).a & 0x0000ffff))

#define gate_segment(g)		((g).a >> 16)

#endif



struct desc_ptr {