From 871480933a1c28f8a9fed4c4d34d06c439a7a422 Mon Sep 17 00:00:00 2001 From: Srikant Patnaik Date: Sun, 11 Jan 2015 12:28:04 +0530 Subject: Moved, renamed, and deleted files The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure. --- arch/ia64/lib/strncpy_from_user.S | 44 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 arch/ia64/lib/strncpy_from_user.S (limited to 'arch/ia64/lib/strncpy_from_user.S') diff --git a/arch/ia64/lib/strncpy_from_user.S b/arch/ia64/lib/strncpy_from_user.S new file mode 100644 index 00000000..a504381f --- /dev/null +++ b/arch/ia64/lib/strncpy_from_user.S @@ -0,0 +1,44 @@ +/* + * Just like strncpy() except that if a fault occurs during copying, + * -EFAULT is returned. + * + * Inputs: + * in0: address of destination buffer + * in1: address of string to be copied + * in2: length of buffer in bytes + * Outputs: + * r8: -EFAULT in case of fault or number of bytes copied if no fault + * + * Copyright (C) 1998-2001 Hewlett-Packard Co + * Copyright (C) 1998-2001 David Mosberger-Tang + * + * 00/03/06 D. Mosberger Fixed to return proper return value (bug found by + * by Andreas Schwab ). + */ + +#include + +GLOBAL_ENTRY(__strncpy_from_user) + alloc r2=ar.pfs,3,0,0,0 + mov r8=0 + mov r9=in1 + ;; + add r10=in1,in2 + cmp.eq p6,p0=r0,in2 +(p6) br.ret.spnt.many rp + + // XXX braindead copy loop---this needs to be optimized +.Loop1: + EX(.Lexit, ld1 r8=[in1],1) + ;; + EX(.Lexit, st1 [in0]=r8,1) + cmp.ne p6,p7=r8,r0 + ;; +(p6) cmp.ne.unc p8,p0=in1,r10 +(p8) br.cond.dpnt.few .Loop1 + ;; +(p6) mov r8=in2 // buffer filled up---return buffer length +(p7) sub r8=in1,r9,1 // return string length (excluding NUL character) +[.Lexit:] + br.ret.sptk.many rp +END(__strncpy_from_user) -- cgit