x86-64: Use symbolics instead of raw numbers in entry_64.S

... making the code a little less fragile.

Also use pushq_cfi instead of raw CFI annotations in two more
places, and add two missing annotations after stack pointer
adjustments which got modified here anyway.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
Acked-by: Alexander van Heukelum <heukelum@fastmail.fm>
LKML-Reference: <4C7FBACF0200007800013F6A@vpn.id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/entry_64.S

@@ -795,8 +795,8 @@ END(interrupt)
 
 /* 0(%rsp): ~(interrupt number) */
 	.macro interrupt func
-	subq $10*8, %rsp
-	CFI_ADJUST_CFA_OFFSET 10*8
+	subq $ORIG_RAX-ARGOFFSET+8, %rsp
+	CFI_ADJUST_CFA_OFFSET ORIG_RAX-ARGOFFSET+8
 	call save_args
 	PARTIAL_FRAME 0
 	call \func
@@ -1035,8 +1035,8 @@ ENTRY(\sym)
 	INTR_FRAME
 	PARAVIRT_ADJUST_EXCEPTION_FRAME
 	pushq_cfi $-1		/* ORIG_RAX: no syscall to restart */
-	subq $15*8,%rsp
-	CFI_ADJUST_CFA_OFFSET 15*8
+	subq $ORIG_RAX-R15, %rsp
+	CFI_ADJUST_CFA_OFFSET ORIG_RAX-R15
 	call error_entry
 	DEFAULT_FRAME 0
 	movq %rsp,%rdi		/* pt_regs pointer */
@@ -1051,9 +1051,9 @@ END(\sym)
 ENTRY(\sym)
 	INTR_FRAME
 	PARAVIRT_ADJUST_EXCEPTION_FRAME
-	pushq $-1		/* ORIG_RAX: no syscall to restart */
-	CFI_ADJUST_CFA_OFFSET 8
-	subq $15*8, %rsp
+	pushq_cfi $-1		/* ORIG_RAX: no syscall to restart */
+	subq $ORIG_RAX-R15, %rsp
+	CFI_ADJUST_CFA_OFFSET ORIG_RAX-R15
 	call save_paranoid
 	TRACE_IRQS_OFF
 	movq %rsp,%rdi		/* pt_regs pointer */
@@ -1069,9 +1069,9 @@ END(\sym)
 ENTRY(\sym)
 	INTR_FRAME
 	PARAVIRT_ADJUST_EXCEPTION_FRAME
-	pushq $-1		/* ORIG_RAX: no syscall to restart */
-	CFI_ADJUST_CFA_OFFSET 8
-	subq $15*8, %rsp
+	pushq_cfi $-1		/* ORIG_RAX: no syscall to restart */
+	subq $ORIG_RAX-R15, %rsp
+	CFI_ADJUST_CFA_OFFSET ORIG_RAX-R15
 	call save_paranoid
 	TRACE_IRQS_OFF
 	movq %rsp,%rdi		/* pt_regs pointer */
@@ -1088,8 +1088,8 @@ END(\sym)
 ENTRY(\sym)
 	XCPT_FRAME
 	PARAVIRT_ADJUST_EXCEPTION_FRAME
-	subq $15*8,%rsp
-	CFI_ADJUST_CFA_OFFSET 15*8
+	subq $ORIG_RAX-R15, %rsp
+	CFI_ADJUST_CFA_OFFSET ORIG_RAX-R15
 	call error_entry
 	DEFAULT_FRAME 0
 	movq %rsp,%rdi			/* pt_regs pointer */
@@ -1106,8 +1106,8 @@ END(\sym)
 ENTRY(\sym)
 	XCPT_FRAME
 	PARAVIRT_ADJUST_EXCEPTION_FRAME
-	subq $15*8,%rsp
-	CFI_ADJUST_CFA_OFFSET 15*8
+	subq $ORIG_RAX-R15, %rsp
+	CFI_ADJUST_CFA_OFFSET ORIG_RAX-R15
 	call save_paranoid
 	DEFAULT_FRAME 0
 	TRACE_IRQS_OFF
@@ -1497,8 +1497,8 @@ ENTRY(nmi)
 	INTR_FRAME
 	PARAVIRT_ADJUST_EXCEPTION_FRAME
 	pushq_cfi $-1
-	subq $15*8, %rsp
-	CFI_ADJUST_CFA_OFFSET 15*8
+	subq $ORIG_RAX-R15, %rsp
+	CFI_ADJUST_CFA_OFFSET ORIG_RAX-R15
 	call save_paranoid
 	DEFAULT_FRAME 0
 	/* paranoidentry do_nmi, 0; without TRACE_IRQS_OFF */