x86, asm: Thin down SAVE/RESTORE_* asm macros

Use dwarf2 cfi annotation macros, making SAVE/RESTORE_* marginally more
readable.

No functionality change.

Signed-off-by: Borislav Petkov <bp@alien8.de>
Link: http://lkml.kernel.org/r/1306873314-32523-2-git-send-email-bp@alien8.de
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

1 files changed, 41 insertions, 60 deletions

diff --git a/arch/x86/include/asm/calling.h b/arch/x86/include/asm/calling.h
index 30af5a832163..b67e06c4710e 100644
--- a/arch/x86/include/asm/calling.h
+++ b/arch/x86/include/asm/calling.h
@@ -46,6 +46,7 @@ For 32-bit we have the following conventions - kernel is built with
 
 */
 
+#include "dwarf2.h"
 
 /*
  * 64-bit system call stack frame layout defines and helpers, for
@@ -87,30 +88,25 @@ For 32-bit we have the following conventions - kernel is built with
         .macro SAVE_ARGS addskip=0, norcx=0, nor891011=0
         subq  $9*8+\addskip, %rsp
         CFI_ADJUST_CFA_OFFSET   9*8+\addskip
-        movq  %rdi, 8*8(%rsp)
-        CFI_REL_OFFSET  rdi, 8*8
-        movq  %rsi, 7*8(%rsp)
-        CFI_REL_OFFSET  rsi, 7*8
-        movq  %rdx, 6*8(%rsp)
-        CFI_REL_OFFSET  rdx, 6*8
+        movq_cfi rdi, 8*8
+        movq_cfi rsi, 7*8
+        movq_cfi rdx, 6*8
+
         .if \norcx
         .else
-        movq  %rcx, 5*8(%rsp)
-        CFI_REL_OFFSET  rcx, 5*8
+        movq_cfi rcx, 5*8
         .endif
-        movq  %rax, 4*8(%rsp)
-        CFI_REL_OFFSET  rax, 4*8
+
+        movq_cfi rax, 4*8
+
         .if \nor891011
         .else
-        movq  %r8, 3*8(%rsp)
-        CFI_REL_OFFSET  r8,  3*8
-        movq  %r9, 2*8(%rsp)
-        CFI_REL_OFFSET  r9,  2*8
-        movq  %r10, 1*8(%rsp)
-        CFI_REL_OFFSET  r10, 1*8
-        movq  %r11, (%rsp)
-        CFI_REL_OFFSET  r11, 0*8
+        movq_cfi r8,  3*8
+        movq_cfi r9,  2*8
+        movq_cfi r10, 1*8
+        movq_cfi r11, 0*8
         .endif
+
         .endm
 
 #define ARG_SKIP        (9*8)
@@ -119,37 +115,34 @@ For 32-bit we have the following conventions - kernel is built with
                             skipr8910=0, skiprdx=0
         .if \skipr11
         .else
-        movq (%rsp), %r11
-        CFI_RESTORE r11
+        movq_cfi_restore 0*8, r11
         .endif
+
         .if \skipr8910
         .else
-        movq 1*8(%rsp), %r10
-        CFI_RESTORE r10
-        movq 2*8(%rsp), %r9
-        CFI_RESTORE r9
-        movq 3*8(%rsp), %r8
-        CFI_RESTORE r8
+        movq_cfi_restore 1*8, r10
+        movq_cfi_restore 2*8, r9
+        movq_cfi_restore 3*8, r8
         .endif
+
         .if \skiprax
         .else
-        movq 4*8(%rsp), %rax
-        CFI_RESTORE rax
+        movq_cfi_restore 4*8, rax
         .endif
+
         .if \skiprcx
         .else
-        movq 5*8(%rsp), %rcx
-        CFI_RESTORE rcx
+        movq_cfi_restore 5*8, rcx
         .endif
+
         .if \skiprdx
         .else
-        movq 6*8(%rsp), %rdx
-        CFI_RESTORE rdx
+        movq_cfi_restore 6*8, rdx
         .endif
-        movq 7*8(%rsp), %rsi
-        CFI_RESTORE rsi
-        movq 8*8(%rsp), %rdi
-        CFI_RESTORE rdi
+
+        movq_cfi_restore 7*8, rsi
+        movq_cfi_restore 8*8, rdi
+
         .if ARG_SKIP+\addskip > 0
         addq $ARG_SKIP+\addskip, %rsp
         CFI_ADJUST_CFA_OFFSET   -(ARG_SKIP+\addskip)
@@ -176,33 +169,21 @@ For 32-bit we have the following conventions - kernel is built with
         .macro SAVE_REST
         subq $REST_SKIP, %rsp
         CFI_ADJUST_CFA_OFFSET   REST_SKIP
-        movq %rbx, 5*8(%rsp)
-        CFI_REL_OFFSET  rbx, 5*8
-        movq %rbp, 4*8(%rsp)
-        CFI_REL_OFFSET  rbp, 4*8
-        movq %r12, 3*8(%rsp)
-        CFI_REL_OFFSET  r12, 3*8
-        movq %r13, 2*8(%rsp)
-        CFI_REL_OFFSET  r13, 2*8
-        movq %r14, 1*8(%rsp)
-        CFI_REL_OFFSET  r14, 1*8
-        movq %r15, (%rsp)
-        CFI_REL_OFFSET  r15, 0*8
+        movq_cfi rbx, 5*8
+        movq_cfi rbp, 4*8
+        movq_cfi r12, 3*8
+        movq_cfi r13, 2*8
+        movq_cfi r14, 1*8
+        movq_cfi r15, 0*8
         .endm
 
         .macro RESTORE_REST
-        movq (%rsp),     %r15
-        CFI_RESTORE r15
-        movq 1*8(%rsp),  %r14
-        CFI_RESTORE r14
-        movq 2*8(%rsp),  %r13
-        CFI_RESTORE r13
-        movq 3*8(%rsp),  %r12
-        CFI_RESTORE r12
-        movq 4*8(%rsp),  %rbp
-        CFI_RESTORE rbp
-        movq 5*8(%rsp),  %rbx
-        CFI_RESTORE rbx
+        movq_cfi_restore 0*8, r15
+        movq_cfi_restore 1*8, r14
+        movq_cfi_restore 2*8, r13
+        movq_cfi_restore 3*8, r12
+        movq_cfi_restore 4*8, rbp
+        movq_cfi_restore 5*8, rbx
         addq $REST_SKIP, %rsp
         CFI_ADJUST_CFA_OFFSET   -(REST_SKIP)
         .endm