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x86: eliminate [gi]dt{,_descr}

PATCH In review Jan Beulich 1 participant 1 message Aug 23, 2006

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Jan Beulich

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PATCH 4/7 x86: eliminate [gi]dt{,_descr}

(in preparation for initial PAE-guest-on-64bit patches) These symbols aren't used anywhere. Again results in less changes needed when introducing the compatibility GDT page.

Signed-off-by Jan Beulich <[email protected]>
xen/arch/x86/boot/x86_32.S +0 -5
Index: 2006-08-16/xen/arch/x86/boot/x86_32.S
===================================================================
@@ -196,21 +196,16 @@ ENTRY(stack_start)
         
 /*** DESCRIPTOR TABLES ***/
 
-.globl idt
-.globl gdt        
-
         ALIGN
         
         .word   0    
 idt_descr:
         .word	256*8-1
-idt:
         .long	idt_table
 
         .word   0
 gdt_descr:
         .word	LAST_RESERVED_GDT_BYTE
-gdt:
         .long   gdt_table - FIRST_RESERVED_GDT_BYTE
 
         .word   0
xen/arch/x86/boot/x86_64.S +0 -5
Index: 2006-08-16/xen/arch/x86/boot/x86_64.S
===================================================================
@@ -192,9 +192,6 @@ ignore_int:
 
 /*** DESCRIPTOR TABLES ***/
 
-.globl idt
-.globl gdt        
-
         .org    0x300
         .code32
 

@@ -212,13 +209,11 @@ cpuid_ext_features:   /* 0x310 */
         .word   0
 gdt_descr:
         .word   LAST_RESERVED_GDT_BYTE
-gdt:
         .quad   gdt_table - FIRST_RESERVED_GDT_BYTE
 
         .word   0,0,0
 idt_descr:
         .word   256*16-1
-idt:
         .quad   idt_table
 
 ENTRY(stack_start)
xen/include/asm-x86/desc.h +0 -5
Index: 2006-08-16/xen/include/asm-x86/desc.h
===================================================================
@@ -155,17 +155,12 @@ __asm__ __volatile__ ("movw %w3,0(%2)\n\
 #endif
 
 extern struct desc_struct gdt_table[];
-extern struct desc_struct *gdt;
-extern idt_entry_t        *idt;
 
 struct Xgt_desc_struct {
     unsigned short size;
     unsigned long address __attribute__((packed));
 };
 
-#define idt_descr (*(struct Xgt_desc_struct *)((char *)&idt - 2))
-#define gdt_descr (*(struct Xgt_desc_struct *)((char *)&gdt - 2))
-
 extern void set_intr_gate(unsigned int irq, void * addr);
 extern void set_system_gate(unsigned int n, void *addr);
 extern void set_task_gate(unsigned int n, unsigned int sel);

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