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| author | Rich Felker <dalias@aerifal.cx> | 2011-06-30 16:31:43 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2011-06-30 16:31:43 -0400 |
| commit | f6fd351c703a2843959b3be83078d9dce33f30f3 (patch) | |
| tree | 0ee99bf56d4a10d72707b4e1e1625e0e289aaf18 | |
| parent | e5cb55fedd811f71cd91ef097a8a4a4964d8c564 (diff) | |
| download | musl-f6fd351c703a2843959b3be83078d9dce33f30f3.tar.gz musl-f6fd351c703a2843959b3be83078d9dce33f30f3.tar.xz musl-f6fd351c703a2843959b3be83078d9dce33f30f3.zip | |
catch invalid ld80 bit patterns and treat them as nan
this should not be necessary - the invalid bit patterns cannot be created except through type punning. however, some broken gnu software is passing them to printf and triggering dangerous stack-smashing, so let's catch them anyway...
| -rw-r--r-- | src/math/__fpclassifyl.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/math/__fpclassifyl.c b/src/math/__fpclassifyl.c index 4f93bef1..4f4f37a7 100644 --- a/src/math/__fpclassifyl.c +++ b/src/math/__fpclassifyl.c @@ -7,10 +7,10 @@ int __fpclassifyl(long double __x) union { long double __ld; __uint16_t __hw[5]; - __uint64_t __m; + __int64_t __m; } __y = { __x }; int __ee = __y.__hw[4]&0x7fff; if (!__ee) return __y.__m ? FP_SUBNORMAL : FP_ZERO; if (__ee==0x7fff) return __y.__m ? FP_NAN : FP_INFINITE; - return FP_NORMAL; + return __y.__m < 0 ? FP_NORMAL : FP_NAN; } |