x86: merge getuser asm functions.
getuser_32.S and getuser_64.S are merged into getuser.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>
diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index 86960a6..e929482 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -5,7 +5,7 @@
obj-$(CONFIG_SMP) := msr-on-cpu.o
lib-y := delay.o
-lib-y += usercopy_$(BITS).o getuser_$(BITS).o putuser_$(BITS).o
+lib-y += usercopy_$(BITS).o getuser.o putuser_$(BITS).o
lib-y += memcpy_$(BITS).o
ifeq ($(CONFIG_X86_32),y)
diff --git a/arch/x86/lib/getuser_64.S b/arch/x86/lib/getuser.S
similarity index 88%
rename from arch/x86/lib/getuser_64.S
rename to arch/x86/lib/getuser.S
index e333884..ad37400 100644
--- a/arch/x86/lib/getuser_64.S
+++ b/arch/x86/lib/getuser.S
@@ -3,6 +3,7 @@
*
* (C) Copyright 1998 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
@@ -13,13 +14,13 @@
/*
* __get_user_X
*
- * Inputs: %rax contains the address.
+ * Inputs: %[r|e]ax contains the address.
* The register is modified, but all changes are undone
* before returning because the C code doesn't know about it.
*
- * Outputs: %rax is error code (0 or -EFAULT)
- * %rdx contains zero-extended value
- *
+ * Outputs: %[r|e]ax is error code (0 or -EFAULT)
+ * %[r|e]dx contains zero-extended value
+ *
*
* These functions should not modify any other registers,
* as they get called from within inline assembly.
@@ -71,6 +72,7 @@
CFI_ENDPROC
ENDPROC(__get_user_4)
+#ifdef CONFIG_X86_64
ENTRY(__get_user_8)
CFI_STARTPROC
add $7,%_ASM_AX
@@ -83,6 +85,7 @@
ret
CFI_ENDPROC
ENDPROC(__get_user_8)
+#endif
bad_get_user:
CFI_STARTPROC
@@ -96,5 +99,6 @@
_ASM_PTR 1b,bad_get_user
_ASM_PTR 2b,bad_get_user
_ASM_PTR 3b,bad_get_user
+#ifdef CONFIG_X86_64
_ASM_PTR 4b,bad_get_user
-.previous
+#endif
diff --git a/arch/x86/lib/getuser_32.S b/arch/x86/lib/getuser_32.S
deleted file mode 100644
index 2bb0a18..0000000
--- a/arch/x86/lib/getuser_32.S
+++ /dev/null
@@ -1,79 +0,0 @@
-/*
- * __get_user functions.
- *
- * (C) Copyright 1998 Linus Torvalds
- *
- * 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.
- */
-#include <linux/linkage.h>
-#include <asm/dwarf2.h>
-#include <asm/thread_info.h>
-#include <asm/asm.h>
-
-
-/*
- * __get_user_X
- *
- * Inputs: %eax contains the address
- *
- * Outputs: %eax is error code (0 or -EFAULT)
- * %edx contains zero-extended value
- *
- * These functions should not modify any other registers,
- * as they get called from within inline assembly.
- */
-
-.text
-ENTRY(__get_user_1)
- CFI_STARTPROC
- GET_THREAD_INFO(%_ASM_DX)
- cmp TI_addr_limit(%_ASM_DX),%_ASM_AX
- jae bad_get_user
-1: movzb (%_ASM_AX),%edx
- xor %eax,%eax
- ret
- CFI_ENDPROC
-ENDPROC(__get_user_1)
-
-ENTRY(__get_user_2)
- CFI_STARTPROC
- add $1,%_ASM_AX
- jc bad_get_user
- GET_THREAD_INFO(%_ASM_DX)
- cmp TI_addr_limit(%_ASM_DX),%_ASM_AX
- jae bad_get_user
-2: movzwl -1(%_ASM_AX),%edx
- xor %eax,%eax
- ret
- CFI_ENDPROC
-ENDPROC(__get_user_2)
-
-ENTRY(__get_user_4)
- CFI_STARTPROC
- add $3,%_ASM_AX
- jc bad_get_user
- GET_THREAD_INFO(%_ASM_DX)
- cmp TI_addr_limit(%_ASM_DX),%_ASM_AX
- jae bad_get_user
-3: mov -3(%_ASM_AX),%edx
- xor %eax,%eax
- ret
- CFI_ENDPROC
-ENDPROC(__get_user_4)
-
-bad_get_user:
- CFI_STARTPROC
- xor %edx,%edx
- mov $-14,%_ASM_AX
- ret
- CFI_ENDPROC
-END(bad_get_user)
-
-.section __ex_table,"a"
- _ASM_PTR 1b,bad_get_user
- _ASM_PTR 2b,bad_get_user
- _ASM_PTR 3b,bad_get_user
-.previous
diff --git a/include/asm-x86/asm.h b/include/asm-x86/asm.h
index 435402e..57750a9 100644
--- a/include/asm-x86/asm.h
+++ b/include/asm-x86/asm.h
@@ -3,8 +3,10 @@
#ifdef __ASSEMBLY__
# define __ASM_FORM(x) x
+# define __ASM_EX_SEC .section __ex_table
#else
# define __ASM_FORM(x) " " #x " "
+# define __ASM_EX_SEC " .section __ex_table,\"a\"\n"
#endif
#ifdef CONFIG_X86_32
@@ -30,7 +32,7 @@
/* Exception table entry */
# define _ASM_EXTABLE(from,to) \
- " .section __ex_table,\"a\"\n" \
+ __ASM_EX_SEC \
_ASM_ALIGN "\n" \
_ASM_PTR #from "," #to "\n" \
" .previous\n"