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-rw-r--r--arch/s390/lib/uaccess64.S207
1 files changed, 0 insertions, 207 deletions
diff --git a/arch/s390/lib/uaccess64.S b/arch/s390/lib/uaccess64.S
deleted file mode 100644
index 1f755be..0000000
--- a/arch/s390/lib/uaccess64.S
+++ /dev/null
@@ -1,207 +0,0 @@
-/*
- * arch/s390x/lib/uaccess.S
- * __copy_{from|to}_user functions.
- *
- * s390
- * Copyright (C) 2000,2002 IBM Deutschland Entwicklung GmbH, IBM Corporation
- * Authors(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
- *
- * These functions have standard call interface
- */
-
-#include <linux/errno.h>
-#include <asm/lowcore.h>
-#include <asm/asm-offsets.h>
-
- .text
- .align 4
- .globl __copy_from_user_asm
- # %r2 = to, %r3 = n, %r4 = from
-__copy_from_user_asm:
- slgr %r0,%r0
-0: mvcp 0(%r3,%r2),0(%r4),%r0
- jnz 1f
- slgr %r2,%r2
- br %r14
-1: la %r2,256(%r2)
- la %r4,256(%r4)
- aghi %r3,-256
-2: mvcp 0(%r3,%r2),0(%r4),%r0
- jnz 1b
-3: slgr %r2,%r2
- br %r14
-4: lghi %r0,-4096
- lgr %r5,%r4
- slgr %r5,%r0
- ngr %r5,%r0 # %r5 = (%r4 + 4096) & -4096
- slgr %r5,%r4 # %r5 = #bytes to next user page boundary
- clgr %r3,%r5 # copy crosses next page boundary ?
- jnh 6f # no, the current page faulted
- # move with the reduced length which is < 256
-5: mvcp 0(%r5,%r2),0(%r4),%r0
- slgr %r3,%r5
-6: lgr %r2,%r3
- br %r14
- .section __ex_table,"a"
- .quad 0b,4b
- .quad 2b,4b
- .quad 5b,6b
- .previous
-
- .align 4
- .text
- .globl __copy_to_user_asm
- # %r2 = from, %r3 = n, %r4 = to
-__copy_to_user_asm:
- slgr %r0,%r0
-0: mvcs 0(%r3,%r4),0(%r2),%r0
- jnz 1f
- slgr %r2,%r2
- br %r14
-1: la %r2,256(%r2)
- la %r4,256(%r4)
- aghi %r3,-256
-2: mvcs 0(%r3,%r4),0(%r2),%r0
- jnz 1b
-3: slgr %r2,%r2
- br %r14
-4: lghi %r0,-4096
- lgr %r5,%r4
- slgr %r5,%r0
- ngr %r5,%r0 # %r5 = (%r4 + 4096) & -4096
- slgr %r5,%r4 # %r5 = #bytes to next user page boundary
- clgr %r3,%r5 # copy crosses next page boundary ?
- jnh 6f # no, the current page faulted
- # move with the reduced length which is < 256
-5: mvcs 0(%r5,%r4),0(%r2),%r0
- slgr %r3,%r5
-6: lgr %r2,%r3
- br %r14
- .section __ex_table,"a"
- .quad 0b,4b
- .quad 2b,4b
- .quad 5b,6b
- .previous
-
- .align 4
- .text
- .globl __copy_in_user_asm
- # %r2 = from, %r3 = n, %r4 = to
-__copy_in_user_asm:
- aghi %r3,-1
- jo 6f
- sacf 256
- bras %r1,4f
-0: aghi %r3,257
-1: mvc 0(1,%r4),0(%r2)
- la %r2,1(%r2)
- la %r4,1(%r4)
- aghi %r3,-1
- jnz 1b
-2: lgr %r2,%r3
- br %r14
-3: mvc 0(256,%r4),0(%r2)
- la %r2,256(%r2)
- la %r4,256(%r4)
-4: aghi %r3,-256
- jnm 3b
-5: ex %r3,4(%r1)
- sacf 0
-6: slgr %r2,%r2
- br 14
- .section __ex_table,"a"
- .quad 1b,2b
- .quad 3b,0b
- .quad 5b,0b
- .previous
-
- .align 4
- .text
- .globl __clear_user_asm
- # %r2 = to, %r3 = n
-__clear_user_asm:
- slgr %r0,%r0
- larl %r5,empty_zero_page
-1: mvcs 0(%r3,%r2),0(%r5),%r0
- jnz 2f
- slgr %r2,%r2
- br %r14
-2: la %r2,256(%r2)
- aghi %r3,-256
-3: mvcs 0(%r3,%r2),0(%r5),%r0
- jnz 2b
-4: slgr %r2,%r2
- br %r14
-5: lghi %r0,-4096
- lgr %r4,%r2
- slgr %r4,%r0
- ngr %r4,%r0 # %r4 = (%r2 + 4096) & -4096
- slgr %r4,%r2 # %r4 = #bytes to next user page boundary
- clgr %r3,%r4 # clear crosses next page boundary ?
- jnh 7f # no, the current page faulted
- # clear with the reduced length which is < 256
-6: mvcs 0(%r4,%r2),0(%r5),%r0
- slgr %r3,%r4
-7: lgr %r2,%r3
- br %r14
- .section __ex_table,"a"
- .quad 1b,5b
- .quad 3b,5b
- .quad 6b,7b
- .previous
-
- .align 4
- .text
- .globl __strncpy_from_user_asm
- # %r2 = count, %r3 = dst, %r4 = src
-__strncpy_from_user_asm:
- lghi %r0,0
- lgr %r1,%r4
- la %r2,0(%r2,%r4) # %r2 points to first byte after string
- sacf 256
-0: srst %r2,%r1
- jo 0b
- sacf 0
- lgr %r1,%r2
- jh 1f # \0 found in string ?
- aghi %r1,1 # include \0 in copy
-1: slgr %r1,%r4 # %r1 = copy length (without \0)
- slgr %r2,%r4 # %r2 = return length (including \0)
-2: mvcp 0(%r1,%r3),0(%r4),%r0
- jnz 3f
- br %r14
-3: la %r3,256(%r3)
- la %r4,256(%r4)
- aghi %r1,-256
- mvcp 0(%r1,%r3),0(%r4),%r0
- jnz 3b
- br %r14
-4: sacf 0
- lghi %r2,-EFAULT
- br %r14
- .section __ex_table,"a"
- .quad 0b,4b
- .previous
-
- .align 4
- .text
- .globl __strnlen_user_asm
- # %r2 = count, %r3 = src
-__strnlen_user_asm:
- lghi %r0,0
- lgr %r1,%r3
- la %r2,0(%r2,%r3) # %r2 points to first byte after string
- sacf 256
-0: srst %r2,%r1
- jo 0b
- sacf 0
- aghi %r2,1 # strnlen_user result includes the \0
- # or return count+1 if \0 not found
- slgr %r2,%r3
- br %r14
-2: sacf 0
- slgr %r2,%r2 # return 0 on exception
- br %r14
- .section __ex_table,"a"
- .quad 0b,2b
- .previous
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