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>

diff --git a/arch/x86/include/asm/calling.h b/arch/x86/include/asm/calling.h
index 30af5a8..b67e06c 100644 (file)
--- 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