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x86: merge putuser asm functions.

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putuser_32.S and putuser_64.S are merged into putuser.S.

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 17:40:14 -03:00 committed by Ingo Molnar
parent 2528de431d
commit 5cbbc3b1eb
3 changed files with 10 additions and 97 deletions
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2
arch/x86/lib/Makefile
View file

@ -5,7 +5,7 @@
obj-$(CONFIG_SMP) := msr-on-cpu.o
lib-y := delay.o
lib-y += usercopy_$(BITS).o getuser.o putuser_$(BITS).o
lib-y += usercopy_$(BITS).o getuser.o putuser.o
lib-y += memcpy_$(BITS).o
ifeq ($(CONFIG_X86_32),y)

11
arch/x86/lib/putuser_32.S → arch/x86/lib/putuser.S
View file

@ -2,6 +2,8 @@
* __put_user functions.
*
* (C) Copyright 2005 Linus Torvalds
* (C) Copyright 2005 Andi Kleen
* (C) Copyright 2008 Glauber Costa
*
* These functions have a non-standard call interface
* to make them more efficient, especially as they
@ -11,6 +13,7 @@
#include <linux/linkage.h>
#include <asm/dwarf2.h>
#include <asm/thread_info.h>
#include <asm/errno.h>
#include <asm/asm.h>
@ -69,15 +72,17 @@ ENTRY(__put_user_8)
sub $7,%_ASM_BX
cmp %_ASM_BX,%_ASM_CX
jae bad_put_user
4: movl %_ASM_AX,(%_ASM_CX)
4: mov %_ASM_AX,(%_ASM_CX)
#ifdef CONFIG_X86_32
5: movl %edx,4(%_ASM_CX)
#endif
xor %eax,%eax
EXIT
ENDPROC(__put_user_8)
bad_put_user:
CFI_STARTPROC
movl $-14,%eax
movl $-EFAULT,%eax
EXIT
END(bad_put_user)
@ -86,5 +91,7 @@ END(bad_put_user)
_ASM_PTR 2b,bad_put_user
_ASM_PTR 3b,bad_put_user
_ASM_PTR 4b,bad_put_user
#ifdef CONFIG_X86_32
_ASM_PTR 5b,bad_put_user
#endif
.previous

94
arch/x86/lib/putuser_64.S
View file

@ -1,94 +0,0 @@
/*
* __put_user functions.
*
* (C) Copyright 1998 Linus Torvalds
* (C) Copyright 2005 Andi Kleen
*
* These functions have a non-standard call interface
* to make them more efficient, especially as they
* return an error value in addition to the "real"
* return value.
*/
/*
* __put_user_X
*
* Inputs: %rcx contains the address
* %rdx contains new value
*
* Outputs: %rax is error code (0 or -EFAULT)
*
* %rbx is destroyed.
*
* These functions should not modify any other registers,
* as they get called from within inline assembly.
*/
#include <linux/linkage.h>
#include <asm/dwarf2.h>
#include <asm/page.h>
#include <asm/errno.h>
#include <asm/asm-offsets.h>
#include <asm/thread_info.h>
#include <asm/asm.h>
#define ENTER CFI_STARTPROC ; \
GET_THREAD_INFO(%_ASM_BX)
#define EXIT ret ; \
CFI_ENDPROC
.text
ENTRY(__put_user_1)
ENTER
cmp TI_addr_limit(%_ASM_BX),%_ASM_CX
jae bad_put_user
1: movb %al,(%_ASM_CX)
xor %eax,%eax
EXIT
ENDPROC(__put_user_1)
ENTRY(__put_user_2)
ENTER
mov TI_addr_limit(%_ASM_BX),%_ASM_BX
sub $1, %_ASM_BX
cmp %_ASM_BX ,%_ASM_CX
jae bad_put_user
2: movw %ax,(%_ASM_CX)
xor %eax,%eax
EXIT
ENDPROC(__put_user_2)
ENTRY(__put_user_4)
ENTER
mov TI_addr_limit(%_ASM_BX),%_ASM_BX
sub $3, %_ASM_BX
cmp %_ASM_BX, %_ASM_CX
jae bad_put_user
3: movl %eax,(%_ASM_CX)
xor %eax,%eax
EXIT
ENDPROC(__put_user_4)
ENTRY(__put_user_8)
ENTER
mov TI_addr_limit(%_ASM_BX),%_ASM_BX
sub $7, %_ASM_BX
cmp %_ASM_BX, %_ASM_CX
jae bad_put_user
4: movq %_ASM_AX,(%_ASM_CX)
xor %eax,%eax
EXIT
ENDPROC(__put_user_8)
bad_put_user:
CFI_STARTPROC
mov $(-EFAULT),%eax
EXIT
END(bad_put_user)
.section __ex_table,"a"
_ASM_PTR 1b,bad_put_user
_ASM_PTR 2b,bad_put_user
_ASM_PTR 3b,bad_put_user
_ASM_PTR 4b,bad_put_user
.previous