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CRIS: __do_strncpy_from_user: Don't read the byte beyond the nil
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Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
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Jesper Nilsson committed Aug 4, 2010
1 parent 2dc1c40 commit da2af0a
Showing 1 changed file with 3 additions and 4 deletions.
7 changes: 3 additions & 4 deletions arch/cris/include/arch-v32/arch/uaccess.h
Original file line number Diff line number Diff line change
Expand Up @@ -122,14 +122,14 @@ __do_strncpy_from_user(char *dst, const char *src, long count)
__asm__ __volatile__ (
" move.d %3,%0\n"
"5: move.b [%2+],$acr\n"
"1: beq 2f\n"
"1: beq 6f\n"
" move.b $acr,[%1+]\n"

" subq 1,%0\n"
"2: bne 1b\n"
" move.b [%2+],$acr\n"

" sub.d %3,%0\n"
"6: sub.d %3,%0\n"
" neg.d %0,%0\n"
"3:\n"
" .section .fixup,\"ax\"\n"
Expand All @@ -140,8 +140,7 @@ __do_strncpy_from_user(char *dst, const char *src, long count)
/* The address for a fault at the first move is trivial.
The address for a fault at the second move is that of
the preceding branch insn, since the move insn is in
its delay-slot. That address is also a branch
target. Just so you don't get confused... */
its delay-slot. Just so you don't get confused... */
" .previous\n"
" .section __ex_table,\"a\"\n"
" .dword 5b,4b\n"
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