x86: move dwarf2 related macro to dwarf2.h

Impact: cleanup

Move recently introduced dwarf2 macros to dwarf2.h file.
It allow us to not duplicate them in assembly files.

Active usage of _cfi macros don't make assembly files
more obvious to understand but we already have a lot of
macros there which requires to search the definitions
of them *anyway*. But at least it make every cfi usage
one line shorter.

Also some code alignment is done.

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/include/asm/dwarf2.h b/arch/x86/include/asm/dwarf2.h
index 804b6e6..3afc5e8 100644 (file)
--- a/arch/x86/include/asm/dwarf2.h
+++ b/arch/x86/include/asm/dwarf2.h
@@ -6,56 +6,91 @@
 #endif
 
 /*
-   Macros for dwarf2 CFI unwind table entries.
-   See "as.info" for details on these pseudo ops. Unfortunately
-   they are only supported in very new binutils, so define them
-   away for older version.
+ * Macros for dwarf2 CFI unwind table entries.
+ * See "as.info" for details on these pseudo ops. Unfortunately
+ * they are only supported in very new binutils, so define them
+ * away for older version.
  */
 
 #ifdef CONFIG_AS_CFI
 
-#define CFI_STARTPROC .cfi_startproc
-#define CFI_ENDPROC .cfi_endproc
-#define CFI_DEF_CFA .cfi_def_cfa
-#define CFI_DEF_CFA_REGISTER .cfi_def_cfa_register
-#define CFI_DEF_CFA_OFFSET .cfi_def_cfa_offset
-#define CFI_ADJUST_CFA_OFFSET .cfi_adjust_cfa_offset
-#define CFI_OFFSET .cfi_offset
-#define CFI_REL_OFFSET .cfi_rel_offset
-#define CFI_REGISTER .cfi_register
-#define CFI_RESTORE .cfi_restore
-#define CFI_REMEMBER_STATE .cfi_remember_state
-#define CFI_RESTORE_STATE .cfi_restore_state
-#define CFI_UNDEFINED .cfi_undefined
+#define CFI_STARTPROC          .cfi_startproc
+#define CFI_ENDPROC            .cfi_endproc
+#define CFI_DEF_CFA            .cfi_def_cfa
+#define CFI_DEF_CFA_REGISTER   .cfi_def_cfa_register
+#define CFI_DEF_CFA_OFFSET     .cfi_def_cfa_offset
+#define CFI_ADJUST_CFA_OFFSET  .cfi_adjust_cfa_offset
+#define CFI_OFFSET             .cfi_offset
+#define CFI_REL_OFFSET         .cfi_rel_offset
+#define CFI_REGISTER           .cfi_register
+#define CFI_RESTORE            .cfi_restore
+#define CFI_REMEMBER_STATE     .cfi_remember_state
+#define CFI_RESTORE_STATE      .cfi_restore_state
+#define CFI_UNDEFINED          .cfi_undefined
 
 #ifdef CONFIG_AS_CFI_SIGNAL_FRAME
-#define CFI_SIGNAL_FRAME .cfi_signal_frame
+#define CFI_SIGNAL_FRAME       .cfi_signal_frame
 #else
 #define CFI_SIGNAL_FRAME
 #endif
 
 #else
 
-/* Due to the structure of pre-exisiting code, don't use assembler line
-   comment character # to ignore the arguments. Instead, use a dummy macro. */
+/*
+ * Due to the structure of pre-exisiting code, don't use assembler line
+ * comment character # to ignore the arguments. Instead, use a dummy macro.
+ */
 .macro cfi_ignore a=0, b=0, c=0, d=0
 .endm
 
-#define CFI_STARTPROC  cfi_ignore
-#define CFI_ENDPROC    cfi_ignore
-#define CFI_DEF_CFA    cfi_ignore
+#define CFI_STARTPROC          cfi_ignore
+#define CFI_ENDPROC            cfi_ignore
+#define CFI_DEF_CFA            cfi_ignore
 #define CFI_DEF_CFA_REGISTER   cfi_ignore
 #define CFI_DEF_CFA_OFFSET     cfi_ignore
 #define CFI_ADJUST_CFA_OFFSET  cfi_ignore
-#define CFI_OFFSET     cfi_ignore
-#define CFI_REL_OFFSET cfi_ignore
-#define CFI_REGISTER   cfi_ignore
-#define CFI_RESTORE    cfi_ignore
-#define CFI_REMEMBER_STATE cfi_ignore
-#define CFI_RESTORE_STATE cfi_ignore
-#define CFI_UNDEFINED cfi_ignore
-#define CFI_SIGNAL_FRAME cfi_ignore
+#define CFI_OFFSET             cfi_ignore
+#define CFI_REL_OFFSET         cfi_ignore
+#define CFI_REGISTER           cfi_ignore
+#define CFI_RESTORE            cfi_ignore
+#define CFI_REMEMBER_STATE     cfi_ignore
+#define CFI_RESTORE_STATE      cfi_ignore
+#define CFI_UNDEFINED          cfi_ignore
+#define CFI_SIGNAL_FRAME       cfi_ignore
 
 #endif
 
+/*
+ * An attempt to make CFI annotations more or less
+ * correct and shorter. It is implied that you know
+ * what you're doing if you use them.
+ */
+#ifdef __ASSEMBLY__
+#ifdef CONFIG_X86_64
+       .macro pushq_cfi reg
+       pushq \reg
+       CFI_ADJUST_CFA_OFFSET 8
+       .endm
+
+       .macro popq_cfi reg
+       popq \reg
+       CFI_ADJUST_CFA_OFFSET -8
+       .endm
+
+       .macro movq_cfi reg offset=0
+       movq %\reg, \offset(%rsp)
+       CFI_REL_OFFSET \reg, \offset
+       .endm
+
+       .macro movq_cfi_restore offset reg
+       movq \offset(%rsp), %\reg
+       CFI_RESTORE \reg
+       .endm
+#else /*!CONFIG_X86_64*/
+
+       /* 32bit defenitions are missed yet */
+
+#endif /*!CONFIG_X86_64*/
+#endif /*__ASSEMBLY__*/
+
 #endif /* _ASM_X86_DWARF2_H */

diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index e5ddf57..249eb60 100644 (file)
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -60,29 +60,6 @@
 #define __AUDIT_ARCH_LE           0x40000000
 
        .code64
-/*
- * Some macro's to hide the most frequently occuring CFI annotations.
- */
-       .macro pushq_cfi reg
-       pushq \reg
-       CFI_ADJUST_CFA_OFFSET 8
-       .endm
-
-       .macro popq_cfi reg
-       popq \reg
-       CFI_ADJUST_CFA_OFFSET -8
-       .endm
-
-       .macro movq_cfi reg offset=0
-       movq %\reg, \offset(%rsp)
-       CFI_REL_OFFSET \reg, \offset
-       .endm
-
-       .macro movq_cfi_restore offset reg
-       movq \offset(%rsp), %\reg
-       CFI_RESTORE \reg
-       .endm
-
 #ifdef CONFIG_FUNCTION_TRACER
 #ifdef CONFIG_DYNAMIC_FTRACE
 ENTRY(mcount)