Fix from glibc for possible crash when printf()'ing a long double.
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@ -1,4 +1,4 @@
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/* Copyright (C) 1995, 1996, 1997, 2000 Free Software Foundation, Inc.
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/* Copyright (C) 1995, 1996, 1997, 2000, 2007 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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The GNU C Library is free software; you can redistribute it and/or
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@ -46,7 +46,7 @@ __mpn_extract_long_double (mp_ptr res_ptr, mp_size_t size,
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#elif BITS_PER_MP_LIMB == 64
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#elif BITS_PER_MP_LIMB == 64
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/* Hopefully the compiler will combine the two bitfield extracts
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/* Hopefully the compiler will combine the two bitfield extracts
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and this composition into just the original quadword extract. */
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and this composition into just the original quadword extract. */
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res_ptr[0] = ((unsigned long int) u.ieee.mantissa0 << 32) | u.ieee.mantissa1;
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res_ptr[0] = ((mp_limb_t) u.ieee.mantissa0 << 32) | u.ieee.mantissa1;
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#define N 1
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#define N 1
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#else
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#else
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#error "mp_limb size " BITS_PER_MP_LIMB "not accounted for"
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#error "mp_limb size " BITS_PER_MP_LIMB "not accounted for"
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@ -109,6 +109,13 @@ __mpn_extract_long_double (mp_ptr res_ptr, mp_size_t size,
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}
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}
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}
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}
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}
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}
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else if (u.ieee.exponent < 0x7fff
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#if N == 2
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&& res_ptr[0] == 0
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#endif
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&& res_ptr[N - 1] == 0)
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/* Pseudo zero. */
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*expt = 0;
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return N;
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return N;
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}
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}
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