diff options
Diffstat (limited to 'arch/cris/arch-v10/lib/csumcpfruser.S')
-rw-r--r-- | arch/cris/arch-v10/lib/csumcpfruser.S | 65 |
1 files changed, 0 insertions, 65 deletions
diff --git a/arch/cris/arch-v10/lib/csumcpfruser.S b/arch/cris/arch-v10/lib/csumcpfruser.S deleted file mode 100644 index beb8992ed478..000000000000 --- a/arch/cris/arch-v10/lib/csumcpfruser.S +++ /dev/null @@ -1,65 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * Add-on to transform csum_partial_copy_nocheck in checksumcopy.S into - * csum_partial_copy_from_user by adding exception records. - * - * Copyright (C) 2001 Axis Communications AB. - * - * Author: Hans-Peter Nilsson. - */ - -#include <asm/errno.h> - -/* Same function body, but a different name. If we just added exception - records to _csum_partial_copy_nocheck and made it generic, we wouldn't - know a user fault from a kernel fault and we would have overhead in - each kernel caller for the error-pointer argument. - - unsigned int csum_partial_copy_from_user - (const char *src, char *dst, int len, unsigned int sum, int *errptr); - - Note that the errptr argument is only set if we encounter an error. - It is conveniently located on the stack, so the normal function body - does not have to handle it. */ - -#define csum_partial_copy_nocheck csum_partial_copy_from_user - -/* There are local labels numbered 1, 2 and 3 present to mark the - different from-user accesses. */ -#include "checksumcopy.S" - - .section .fixup,"ax" - -;; Here from the movem loop; restore stack. -4: - movem [$sp+],$r8 -;; r12 is already decremented. Add back chunk_size-2. - addq 40-2,$r12 - -;; Here from the word loop; r12 is off by 2; add it back. -5: - addq 2,$r12 - -;; Here from a failing single byte. -6: - -;; Signal in *errptr that we had a failing access. - moveq -EFAULT,$r9 - move.d $r9,[[$sp]] - -;; Clear the rest of the destination area using memset. Preserve the -;; checksum for the readable bytes. - push $srp - push $r13 - move.d $r11,$r10 - clear.d $r11 - jsr memset - pop $r10 - jump [$sp+] - - .previous - .section __ex_table,"a" - .dword 1b,4b - .dword 2b,5b - .dword 3b,6b - .previous |