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x86: replace function headers by macros. 

In putuser_64.S, do it the i386 way, and replace the code
in beginning and end of functions with macros, since it's
always the same thing. Save lines.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Glauber Costa 2008-06-24 16:56:30 -03:00 committed by Ingo Molnar
parent 663aa96df3
commit 766ed42821
1 changed files with 14 additions and 18 deletions
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32
arch/x86/lib/putuser_64.S
View File

@ -31,62 +31,58 @@
#include <asm/asm-offsets.h>
#include <asm/thread_info.h>
#define ENTER CFI_STARTPROC ; \
GET_THREAD_INFO(%rbx)
#define EXIT ret ; \
CFI_ENDPROC
.text
ENTRY(__put_user_1)
CFI_STARTPROC
GET_THREAD_INFO(%rbx)
ENTER
cmpq TI_addr_limit(%rbx),%rcx
jae bad_put_user
1: movb %al,(%rcx)
xorl %eax,%eax
ret
CFI_ENDPROC
EXIT
ENDPROC(__put_user_1)
ENTRY(__put_user_2)
CFI_STARTPROC
GET_THREAD_INFO(%rbx)
ENTER
mov TI_addr_limit(%rbx),%rbx
sub $1, %rbx
cmpq %rbx ,%rcx
jae bad_put_user
2: movw %ax,(%rcx)
xorl %eax,%eax
ret
CFI_ENDPROC
EXIT
ENDPROC(__put_user_2)
ENTRY(__put_user_4)
CFI_STARTPROC
GET_THREAD_INFO(%rbx)
ENTER
mov TI_addr_limit(%rbx),%rbx
sub $3, %rbx
cmp %rbx, %rcx
jae bad_put_user
3: movl %eax,(%rcx)
xorl %eax,%eax
ret
CFI_ENDPROC
EXIT
ENDPROC(__put_user_4)
ENTRY(__put_user_8)
CFI_STARTPROC
GET_THREAD_INFO(%rbx)
ENTER
mov TI_addr_limit(%rbx),%rbx
sub $7, %rbx
cmp %rbx, %rcx
jae bad_put_user
4: movq %rax,(%rcx)
xorl %eax,%eax
ret
CFI_ENDPROC
EXIT
ENDPROC(__put_user_8)
bad_put_user:
CFI_STARTPROC
movq $(-EFAULT),%rax
ret
CFI_ENDPROC
EXIT
END(bad_put_user)
.section __ex_table,"a"