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>

diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 64dfe30..6f30583 100644 (file)
--- a/arch/x86/kernel/entry_64.S
+++ b/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 */