[PATCH] [19/35] i386: Add dwarf2 annotations to *_user and checksum functions
From: Andi Kleen
Date: Sat Apr 28 2007 - 14:14:39 EST
From: Jan Beulich <jbeulich@xxxxxxxxxx>
Signed-off-by: Andi Kleen <ak@xxxxxxx>
---
arch/i386/lib/checksum.S | 69 ++++++++++++++++++++++++++++++++++++++++-------
arch/i386/lib/getuser.S | 26 +++++++++++------
arch/i386/lib/putuser.S | 39 +++++++++++++++++---------
3 files changed, 102 insertions(+), 32 deletions(-)
Index: linux/arch/i386/lib/checksum.S
===================================================================
--- linux.orig/arch/i386/lib/checksum.S
+++ linux/arch/i386/lib/checksum.S
@@ -25,6 +25,8 @@
* 2 of the License, or (at your option) any later version.
*/
+#include <linux/linkage.h>
+#include <asm/dwarf2.h>
#include <asm/errno.h>
/*
@@ -36,8 +38,6 @@ unsigned int csum_partial(const unsigned
*/
.text
-.align 4
-.globl csum_partial
#ifndef CONFIG_X86_USE_PPRO_CHECKSUM
@@ -48,9 +48,14 @@ unsigned int csum_partial(const unsigned
* Fortunately, it is easy to convert 2-byte alignment to 4-byte
* alignment for the unrolled loop.
*/
-csum_partial:
+ENTRY(csum_partial)
+ CFI_STARTPROC
pushl %esi
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET esi, 0
pushl %ebx
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET ebx, 0
movl 20(%esp),%eax # Function arg: unsigned int sum
movl 16(%esp),%ecx # Function arg: int len
movl 12(%esp),%esi # Function arg: unsigned char *buff
@@ -128,16 +133,27 @@ csum_partial:
roll $8, %eax
8:
popl %ebx
+ CFI_ADJUST_CFA_OFFSET -4
+ CFI_RESTORE ebx
popl %esi
+ CFI_ADJUST_CFA_OFFSET -4
+ CFI_RESTORE esi
ret
+ CFI_ENDPROC
+ENDPROC(csum_partial)
#else
/* Version for PentiumII/PPro */
-csum_partial:
+ENTRY(csum_partial)
+ CFI_STARTPROC
pushl %esi
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET esi, 0
pushl %ebx
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET ebx, 0
movl 20(%esp),%eax # Function arg: unsigned int sum
movl 16(%esp),%ecx # Function arg: int len
movl 12(%esp),%esi # Function arg: const unsigned char *buf
@@ -245,8 +261,14 @@ csum_partial:
roll $8, %eax
90:
popl %ebx
+ CFI_ADJUST_CFA_OFFSET -4
+ CFI_RESTORE ebx
popl %esi
+ CFI_ADJUST_CFA_OFFSET -4
+ CFI_RESTORE esi
ret
+ CFI_ENDPROC
+ENDPROC(csum_partial)
#endif
@@ -278,19 +300,24 @@ unsigned int csum_partial_copy_generic (
.long 9999b, 6002f ; \
.previous
-.align 4
-.globl csum_partial_copy_generic
-
#ifndef CONFIG_X86_USE_PPRO_CHECKSUM
#define ARGBASE 16
#define FP 12
-csum_partial_copy_generic:
+ENTRY(csum_partial_copy_generic)
+ CFI_STARTPROC
subl $4,%esp
+ CFI_ADJUST_CFA_OFFSET 4
pushl %edi
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET edi, 0
pushl %esi
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET esi, 0
pushl %ebx
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET ebx, 0
movl ARGBASE+16(%esp),%eax # sum
movl ARGBASE+12(%esp),%ecx # len
movl ARGBASE+4(%esp),%esi # src
@@ -400,10 +427,19 @@ DST( movb %cl, (%edi) )
.previous
popl %ebx
+ CFI_ADJUST_CFA_OFFSET -4
+ CFI_RESTORE ebx
popl %esi
+ CFI_ADJUST_CFA_OFFSET -4
+ CFI_RESTORE esi
popl %edi
+ CFI_ADJUST_CFA_OFFSET -4
+ CFI_RESTORE edi
popl %ecx # equivalent to addl $4,%esp
+ CFI_ADJUST_CFA_OFFSET -4
ret
+ CFI_ENDPROC
+ENDPROC(csum_partial_copy_generic)
#else
@@ -421,10 +457,17 @@ DST( movb %cl, (%edi) )
#define ARGBASE 12
-csum_partial_copy_generic:
+ENTRY(csum_partial_copy_generic)
+ CFI_STARTPROC
pushl %ebx
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET ebx, 0
pushl %edi
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET edi, 0
pushl %esi
+ CFI_ADJUST_CFA_OFFSET 4
+ CFI_REL_OFFSET esi, 0
movl ARGBASE+4(%esp),%esi #src
movl ARGBASE+8(%esp),%edi #dst
movl ARGBASE+12(%esp),%ecx #len
@@ -485,9 +528,17 @@ DST( movb %dl, (%edi) )
.previous
popl %esi
+ CFI_ADJUST_CFA_OFFSET -4
+ CFI_RESTORE esi
popl %edi
+ CFI_ADJUST_CFA_OFFSET -4
+ CFI_RESTORE edi
popl %ebx
+ CFI_ADJUST_CFA_OFFSET -4
+ CFI_RESTORE ebx
ret
+ CFI_ENDPROC
+ENDPROC(csum_partial_copy_generic)
#undef ROUND
#undef ROUND1
Index: linux/arch/i386/lib/getuser.S
===================================================================
--- linux.orig/arch/i386/lib/getuser.S
+++ linux/arch/i386/lib/getuser.S
@@ -8,6 +8,8 @@
* return an error value in addition to the "real"
* return value.
*/
+#include <linux/linkage.h>
+#include <asm/dwarf2.h>
#include <asm/thread_info.h>
@@ -24,19 +26,19 @@
*/
.text
-.align 4
-.globl __get_user_1
-__get_user_1:
+ENTRY(__get_user_1)
+ CFI_STARTPROC
GET_THREAD_INFO(%edx)
cmpl TI_addr_limit(%edx),%eax
jae bad_get_user
1: movzbl (%eax),%edx
xorl %eax,%eax
ret
+ CFI_ENDPROC
+ENDPROC(__get_user_1)
-.align 4
-.globl __get_user_2
-__get_user_2:
+ENTRY(__get_user_2)
+ CFI_STARTPROC
addl $1,%eax
jc bad_get_user
GET_THREAD_INFO(%edx)
@@ -45,10 +47,11 @@ __get_user_2:
2: movzwl -1(%eax),%edx
xorl %eax,%eax
ret
+ CFI_ENDPROC
+ENDPROC(__get_user_2)
-.align 4
-.globl __get_user_4
-__get_user_4:
+ENTRY(__get_user_4)
+ CFI_STARTPROC
addl $3,%eax
jc bad_get_user
GET_THREAD_INFO(%edx)
@@ -57,11 +60,16 @@ __get_user_4:
3: movl -3(%eax),%edx
xorl %eax,%eax
ret
+ CFI_ENDPROC
+ENDPROC(__get_user_4)
bad_get_user:
+ CFI_STARTPROC
xorl %edx,%edx
movl $-14,%eax
ret
+ CFI_ENDPROC
+END(bad_get_user)
.section __ex_table,"a"
.long 1b,bad_get_user
Index: linux/arch/i386/lib/putuser.S
===================================================================
--- linux.orig/arch/i386/lib/putuser.S
+++ linux/arch/i386/lib/putuser.S
@@ -8,6 +8,8 @@
* return an error value in addition to the "real"
* return value.
*/
+#include <linux/linkage.h>
+#include <asm/dwarf2.h>
#include <asm/thread_info.h>
@@ -23,23 +25,28 @@
* as they get called from within inline assembly.
*/
-#define ENTER pushl %ebx ; GET_THREAD_INFO(%ebx)
-#define EXIT popl %ebx ; ret
+#define ENTER CFI_STARTPROC ; \
+ pushl %ebx ; \
+ CFI_ADJUST_CFA_OFFSET 4 ; \
+ CFI_REL_OFFSET ebx, 0 ; \
+ GET_THREAD_INFO(%ebx)
+#define EXIT popl %ebx ; \
+ CFI_ADJUST_CFA_OFFSET -4 ; \
+ CFI_RESTORE ebx ; \
+ ret ; \
+ CFI_ENDPROC
.text
-.align 4
-.globl __put_user_1
-__put_user_1:
+ENTRY(__put_user_1)
ENTER
cmpl TI_addr_limit(%ebx),%ecx
jae bad_put_user
1: movb %al,(%ecx)
xorl %eax,%eax
EXIT
+ENDPROC(__put_user_1)
-.align 4
-.globl __put_user_2
-__put_user_2:
+ENTRY(__put_user_2)
ENTER
movl TI_addr_limit(%ebx),%ebx
subl $1,%ebx
@@ -48,10 +55,9 @@ __put_user_2:
2: movw %ax,(%ecx)
xorl %eax,%eax
EXIT
+ENDPROC(__put_user_2)
-.align 4
-.globl __put_user_4
-__put_user_4:
+ENTRY(__put_user_4)
ENTER
movl TI_addr_limit(%ebx),%ebx
subl $3,%ebx
@@ -60,10 +66,9 @@ __put_user_4:
3: movl %eax,(%ecx)
xorl %eax,%eax
EXIT
+ENDPROC(__put_user_4)
-.align 4
-.globl __put_user_8
-__put_user_8:
+ENTRY(__put_user_8)
ENTER
movl TI_addr_limit(%ebx),%ebx
subl $7,%ebx
@@ -73,10 +78,16 @@ __put_user_8:
5: movl %edx,4(%ecx)
xorl %eax,%eax
EXIT
+ENDPROC(__put_user_8)
bad_put_user:
+ CFI_STARTPROC simple
+ CFI_DEF_CFA esp, 2*4
+ CFI_OFFSET eip, -1*4
+ CFI_OFFSET ebx, -2*4
movl $-14,%eax
EXIT
+END(bad_put_user)
.section __ex_table,"a"
.long 1b,bad_put_user
-
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