x86: don't clobber r8 nor use rcx.

[linux-beck.git] / arch / x86 / lib / getuser_64.S

diff --git a/arch/x86/lib/getuser_64.S b/arch/x86/lib/getuser_64.S
index 5448876261f8734b2b4367c3295dd074c8d33542..2b003d313480fba488ed80fc8b58d069b8ff37d7 100644 (file)
--- a/arch/x86/lib/getuser_64.S
+++ b/arch/x86/lib/getuser_64.S
@@ -36,10 +36,10 @@
        .text
 ENTRY(__get_user_1)
        CFI_STARTPROC
-       GET_THREAD_INFO(%r8)
-       cmpq threadinfo_addr_limit(%r8),%rcx
+       GET_THREAD_INFO(%rdx)
+       cmpq threadinfo_addr_limit(%rdx),%rax
        jae bad_get_user
-1:     movzb (%rcx),%edx
+1:     movzb (%rax),%edx
        xorl %eax,%eax
        ret
        CFI_ENDPROC
@@ -47,48 +47,48 @@ ENDPROC(__get_user_1)
 
 ENTRY(__get_user_2)
        CFI_STARTPROC
-       GET_THREAD_INFO(%r8)
-       addq $1,%rcx
+       GET_THREAD_INFO(%rdx)
+       addq $1,%rax
        jc 20f
-       cmpq threadinfo_addr_limit(%r8),%rcx
+       cmpq threadinfo_addr_limit(%rdx),%rax
        jae 20f
-       decq   %rcx
-2:     movzwl (%rcx),%edx
+       decq   %rax
+2:     movzwl (%rax),%edx
        xorl %eax,%eax
        ret
-20:    decq    %rcx
+20:    decq    %rax
        jmp     bad_get_user
        CFI_ENDPROC
 ENDPROC(__get_user_2)
 
 ENTRY(__get_user_4)
        CFI_STARTPROC
-       GET_THREAD_INFO(%r8)
-       addq $3,%rcx
+       GET_THREAD_INFO(%rdx)
+       addq $3,%rax
        jc 30f
-       cmpq threadinfo_addr_limit(%r8),%rcx
+       cmpq threadinfo_addr_limit(%rdx),%rax
        jae 30f
-       subq $3,%rcx
-3:     movl (%rcx),%edx
+       subq $3,%rax
+3:     movl (%rax),%edx
        xorl %eax,%eax
        ret
-30:    subq $3,%rcx
+30:    subq $3,%rax
        jmp bad_get_user
        CFI_ENDPROC
 ENDPROC(__get_user_4)
 
 ENTRY(__get_user_8)
        CFI_STARTPROC
-       GET_THREAD_INFO(%r8)
-       addq $7,%rcx
+       GET_THREAD_INFO(%rdx)
+       addq $7,%rax
        jc 40f
-       cmpq threadinfo_addr_limit(%r8),%rcx
+       cmpq threadinfo_addr_limit(%rdx),%rax
        jae     40f
-       subq    $7,%rcx
-4:     movq (%rcx),%rdx
+       subq    $7,%rax
+4:     movq (%rax),%rdx
        xorl %eax,%eax
        ret
-40:    subq $7,%rcx
+40:    subq $7,%rax
        jmp bad_get_user
        CFI_ENDPROC
 ENDPROC(__get_user_8)