diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/parisc/lib/lusercopy.S')
| -rw-r--r-- | ANDROID_3.4.5/arch/parisc/lib/lusercopy.S | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/ANDROID_3.4.5/arch/parisc/lib/lusercopy.S b/ANDROID_3.4.5/arch/parisc/lib/lusercopy.S deleted file mode 100644 index 1bd23cce..00000000 --- a/ANDROID_3.4.5/arch/parisc/lib/lusercopy.S +++ /dev/null @@ -1,180 +0,0 @@ -/* - * User Space Access Routines - * - * Copyright (C) 2000-2002 Hewlett-Packard (John Marvin) - * Copyright (C) 2000 Richard Hirst <rhirst with parisc-linux.org> - * Copyright (C) 2001 Matthieu Delahaye <delahaym at esiee.fr> - * Copyright (C) 2003 Randolph Chung <tausq with parisc-linux.org> - * - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -/* - * These routines still have plenty of room for optimization - * (word & doubleword load/store, dual issue, store hints, etc.). - */ - -/* - * The following routines assume that space register 3 (sr3) contains - * the space id associated with the current users address space. - */ - - - .text - -#include <asm/assembly.h> -#include <asm/errno.h> -#include <linux/linkage.h> - - /* - * get_sr gets the appropriate space value into - * sr1 for kernel/user space access, depending - * on the flag stored in the task structure. - */ - - .macro get_sr - mfctl %cr30,%r1 - ldw TI_SEGMENT(%r1),%r22 - mfsp %sr3,%r1 - or,<> %r22,%r0,%r0 - copy %r0,%r1 - mtsp %r1,%sr1 - .endm - - .macro fixup_branch lbl - ldil L%\lbl, %r1 - ldo R%\lbl(%r1), %r1 - bv %r0(%r1) - .endm - - /* - * long lstrncpy_from_user(char *dst, const char *src, long n) - * - * Returns -EFAULT if exception before terminator, - * N if the entire buffer filled, - * otherwise strlen (i.e. excludes zero byte) - */ - -ENTRY(lstrncpy_from_user) - .proc - .callinfo NO_CALLS - .entry - comib,= 0,%r24,$lsfu_done - copy %r24,%r23 - get_sr -1: ldbs,ma 1(%sr1,%r25),%r1 -$lsfu_loop: - stbs,ma %r1,1(%r26) - comib,=,n 0,%r1,$lsfu_done - addib,<>,n -1,%r24,$lsfu_loop -2: ldbs,ma 1(%sr1,%r25),%r1 -$lsfu_done: - sub %r23,%r24,%r28 -$lsfu_exit: - bv %r0(%r2) - nop - .exit -ENDPROC(lstrncpy_from_user) - - .section .fixup,"ax" -3: fixup_branch $lsfu_exit - ldi -EFAULT,%r28 - .previous - - .section __ex_table,"aw" - ASM_ULONG_INSN 1b,3b - ASM_ULONG_INSN 2b,3b - .previous - - .procend - - /* - * unsigned long lclear_user(void *to, unsigned long n) - * - * Returns 0 for success. - * otherwise, returns number of bytes not transferred. - */ - -ENTRY(lclear_user) - .proc - .callinfo NO_CALLS - .entry - comib,=,n 0,%r25,$lclu_done - get_sr -$lclu_loop: - addib,<> -1,%r25,$lclu_loop -1: stbs,ma %r0,1(%sr1,%r26) - -$lclu_done: - bv %r0(%r2) - copy %r25,%r28 - .exit -ENDPROC(lclear_user) - - .section .fixup,"ax" -2: fixup_branch $lclu_done - ldo 1(%r25),%r25 - .previous - - .section __ex_table,"aw" - ASM_ULONG_INSN 1b,2b - .previous - - .procend - - /* - * long lstrnlen_user(char *s, long n) - * - * Returns 0 if exception before zero byte or reaching N, - * N+1 if N would be exceeded, - * else strlen + 1 (i.e. includes zero byte). - */ - -ENTRY(lstrnlen_user) - .proc - .callinfo NO_CALLS - .entry - comib,= 0,%r25,$lslen_nzero - copy %r26,%r24 - get_sr -1: ldbs,ma 1(%sr1,%r26),%r1 -$lslen_loop: - comib,=,n 0,%r1,$lslen_done - addib,<> -1,%r25,$lslen_loop -2: ldbs,ma 1(%sr1,%r26),%r1 -$lslen_done: - bv %r0(%r2) - sub %r26,%r24,%r28 - .exit - -$lslen_nzero: - b $lslen_done - ldo 1(%r26),%r26 /* special case for N == 0 */ -ENDPROC(lstrnlen_user) - - .section .fixup,"ax" -3: fixup_branch $lslen_done - copy %r24,%r26 /* reset r26 so 0 is returned on fault */ - .previous - - .section __ex_table,"aw" - ASM_ULONG_INSN 1b,3b - ASM_ULONG_INSN 2b,3b - .previous - - .procend - - .end |