Jan Beulich
2006-Nov-13 11:47 UTC
[Xen-devel] [PATCH, resend] x86: eliminate unused {g,i}dt{,_descr}
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Index: 2006-09-21/xen/arch/x86/boot/x86_32.S
==================================================================---
2006-09-21.orig/xen/arch/x86/boot/x86_32.S 2006-08-21 18:02:23.000000000 +0200
+++ 2006-09-21/xen/arch/x86/boot/x86_32.S 2006-09-21 11:04:30.000000000 +0200
@@ -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
Index: 2006-09-21/xen/arch/x86/boot/x86_64.S
==================================================================---
2006-09-21.orig/xen/arch/x86/boot/x86_64.S 2006-09-20 18:25:09.000000000 +0200
+++ 2006-09-21/xen/arch/x86/boot/x86_64.S 2006-09-21 11:05:00.000000000 +0200
@@ -192,9 +192,6 @@ ignore_int:
/*** DESCRIPTOR TABLES ***/
-.globl idt
-.globl gdt
-
.align 8, 0xCC
multiboot_ptr:
.long 0
@@ -210,13 +207,11 @@ cpuid_ext_features:
.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)
Index: 2006-09-21/xen/include/asm-x86/desc.h
==================================================================---
2006-09-21.orig/xen/include/asm-x86/desc.h 2006-02-28 17:35:12.000000000 +0100
+++ 2006-09-21/xen/include/asm-x86/desc.h 2006-09-21 11:04:30.000000000 +0200
@@ -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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