| Subject | [PATCH 08 of 36] x86_64: Add gate_offset() and gate_segment() macros | Date | Wed, 25 Jun 2008 00:19:04 -0400 | From | Jeremy Fitzhardinge <> |
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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> --- include/asm-x86/desc_defs.h | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h --- a/include/asm-x86/desc_defs.h +++ b/include/asm-x86/desc_defs.h @@ -75,10 +75,14 @@ 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 {
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