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x86: introduce ldt_desc type.

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this patch introduces ldt_desc type to account for the differences
in the ldt descriptor in x86_64 and i386

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Glauber de Oliveira Costa
2008-01-30 13:31:13 +01:00
committed by Ingo Molnar
parent 8d947344c4
commit 25deca53e9
2 changed files with 4 additions and 2 deletions
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2
include/asm-x86/desc_64.h
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@@ -113,7 +113,7 @@ static inline void store_idt(struct desc_ptr *dtr)
static inline void set_tssldt_descriptor(void *ptr, unsigned long tss, static inline void set_tssldt_descriptor(void *ptr, unsigned long tss,
unsigned type, unsigned size) unsigned type, unsigned size)
{ {
struct ldttss_desc d; struct ldttss_desc64 d;
memset(&d, 0, sizeof(d)); memset(&d, 0, sizeof(d));
d.limit0 = size & 0xFFFF; d.limit0 = size & 0xFFFF;

4
include/asm-x86/desc_defs.h
View File

@@ -58,7 +58,7 @@ enum {
}; };
// LDT or TSS descriptor in the GDT. 16 bytes. // LDT or TSS descriptor in the GDT. 16 bytes.
struct ldttss_desc { struct ldttss_desc64 {
u16 limit0; u16 limit0;
u16 base0; u16 base0;
unsigned base1 : 8, type : 5, dpl : 2, p : 1; unsigned base1 : 8, type : 5, dpl : 2, p : 1;
@@ -69,8 +69,10 @@ struct ldttss_desc {
#ifdef CONFIG_X86_64 #ifdef CONFIG_X86_64
typedef struct gate_struct64 gate_desc; typedef struct gate_struct64 gate_desc;
typedef struct ldttss_desc64 ldt_desc;
#else #else
typedef struct desc_struct gate_desc; typedef struct desc_struct gate_desc;
typedef struct desc_struct ldt_desc;
#endif #endif
struct desc_ptr { struct desc_ptr {