From 43adfc26dea171558f944adbc9adecddf2d4602f Mon Sep 17 00:00:00 2001 From: Jeremy Fitzhardinge Date: Wed, 25 Jun 2008 00:19:04 -0400 Subject: 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 Signed-off-by: Jeremy Fitzhardinge Cc: xen-devel Cc: Stephen Tweedie Cc: Eduardo Habkost Cc: Mark McLoughlin Signed-off-by: Ingo Molnar --- include/asm-x86/desc_defs.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/asm-x86/desc_defs.h') diff --git a/include/asm-x86/desc_defs.h b/include/asm-x86/desc_defs.h index eccb4ea1f91..f7bacf357da 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 { -- cgit v1.2.3-18-g5258