diff options
Diffstat (limited to 'arch/x86/lib/putuser_64.S')
| -rw-r--r-- | arch/x86/lib/putuser_64.S | 32 |
1 files changed, 14 insertions, 18 deletions
diff --git a/arch/x86/lib/putuser_64.S b/arch/x86/lib/putuser_64.S index a96bd8a5298e..6d7513bf885e 100644 --- a/arch/x86/lib/putuser_64.S +++ b/arch/x86/lib/putuser_64.S @@ -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" |