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x86 setup: correct the base in the GDT_ENTRY() macro

The GDT_ENTRY() macro in pm.c would incorrectly cut the bottom 8 bits
off the base.  We didn't define any bases with the bottom 8 bits
nonzero, so it is a non-manifest bug, but it's still a bug.

Pointed out by John Smith <johnsmith9344@gmail.com>.
Cc: John Smith <johnsmith9344@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
H. Peter Anvin 17 年之前
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共有 1 個文件被更改,包括 1 次插入1 次删除
  1. 1 1
      arch/x86/boot/pm.c

+ 1 - 1
arch/x86/boot/pm.c

@@ -104,7 +104,7 @@ static void reset_coprocessor(void)
 	(((u64)(base & 0xff000000) << 32) |	\
 	 ((u64)flags << 40) |			\
 	 ((u64)(limit & 0x00ff0000) << 32) |	\
-	 ((u64)(base & 0x00ffff00) << 16) |	\
+	 ((u64)(base & 0x00ffffff) << 16) |	\
 	 ((u64)(limit & 0x0000ffff)))
 
 struct gdt_ptr {