[PATCH] i386: annotate FIX_STACK() and the rest of nmi()

In i386's entry.S, FIX_STACK() needs annotation because it
replaces the stack pointer.  And the rest of nmi() needs
annotation in order to compile with these new annotations.

Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: Andi Kleen <ak@suse.de>

diff --git a/arch/i386/kernel/entry.S b/arch/i386/kernel/entry.S
index 0928f70..4b08452 100644 (file)
--- a/arch/i386/kernel/entry.S
+++ b/arch/i386/kernel/entry.S
@@ -701,9 +701,15 @@ device_not_available_emulate:
        jne ok;                                 \
 label:                                         \
        movl TSS_sysenter_esp0+offset(%esp),%esp;       \
+       CFI_DEF_CFA esp, 0;                     \
+       CFI_UNDEFINED eip;                      \
        pushfl;                                 \
+       CFI_ADJUST_CFA_OFFSET 4;                \
        pushl $__KERNEL_CS;                     \
-       pushl $sysenter_past_esp
+       CFI_ADJUST_CFA_OFFSET 4;                \
+       pushl $sysenter_past_esp;               \
+       CFI_ADJUST_CFA_OFFSET 4;                \
+       CFI_REL_OFFSET eip, 0
 
 KPROBE_ENTRY(debug)
        RING0_INT_FRAME
@@ -754,6 +760,7 @@ KPROBE_ENTRY(nmi)
        cmpl $sysenter_entry,12(%esp)
        je nmi_debug_stack_check
 nmi_stack_correct:
+       /* We have a RING0_INT_FRAME here */
        pushl %eax
        CFI_ADJUST_CFA_OFFSET 4
        SAVE_ALL
@@ -764,9 +771,12 @@ nmi_stack_correct:
        CFI_ENDPROC
 
 nmi_stack_fixup:
+       RING0_INT_FRAME
        FIX_STACK(12,nmi_stack_correct, 1)
        jmp nmi_stack_correct
+
 nmi_debug_stack_check:
+       /* We have a RING0_INT_FRAME here */
        cmpw $__KERNEL_CS,16(%esp)
        jne nmi_stack_correct
        cmpl $debug,(%esp)
@@ -777,8 +787,10 @@ nmi_debug_stack_check:
        jmp nmi_stack_correct
 
 nmi_16bit_stack:
-       RING0_INT_FRAME
-       /* create the pointer to lss back */
+       /* We have a RING0_INT_FRAME here.
+        *
+        * create the pointer to lss back
+        */
        pushl %ss
        CFI_ADJUST_CFA_OFFSET 4
        pushl %esp

diff --git a/include/asm-i386/dwarf2.h b/include/asm-i386/dwarf2.h
index fe2392f..5d1a8db 100644 (file)
--- a/include/asm-i386/dwarf2.h
+++ b/include/asm-i386/dwarf2.h
@@ -26,6 +26,7 @@
 #define CFI_RESTORE .cfi_restore
 #define CFI_REMEMBER_STATE .cfi_remember_state
 #define CFI_RESTORE_STATE .cfi_restore_state
+#define CFI_UNDEFINED .cfi_undefined
 
 #else
 
@@ -46,6 +47,7 @@
 #define CFI_RESTORE    ignore
 #define CFI_REMEMBER_STATE ignore
 #define CFI_RESTORE_STATE ignore
+#define CFI_UNDEFINED ignore
 
 #endif