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authorJeremy Fitzhardinge <jeremy@goop.org>2008-06-25 00:19:04 -0400
committerIngo Molnar <mingo@elte.hu>2008-07-08 13:10:28 +0200
commit43adfc26dea171558f944adbc9adecddf2d4602f (patch)
treed0b2b3b3b1c6ba1c47080d06639c37e357118a9d /include/asm-x86/desc_defs.h
parent4583ed514ea9ac844a6eb02d33120beaedf6837f (diff)
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>
Diffstat (limited to 'include/asm-x86/desc_defs.h')
-rw-r--r--include/asm-x86/desc_defs.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h
index eccb4ea1f918..f7bacf357dac 100644
--- a/include/asm-x86/desc_defs.h
+++ b/include/asm-x86/desc_defs.h
@@ -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 {